JP7149910B2 - WORK STOPPING PLANNING SUPPORT DEVICE AND WORK STOPPING PLANNING SUPPORT METHOD - Google Patents

Description

The present invention relates to a work stoppage planning support device and a work stoppage planning support method.

Power equipment included in the power system requires work such as inspection and repair depending on the situation. During the work, the work power equipment and related power equipment necessary for the work are stopped before the work is carried out.

In order to avoid these problems or minimize their impact, the work schedule for each work and the system configuration during work are examined and adjusted in advance. The prearranged work schedule for each work and system configuration during work is called a work stoppage plan. It is necessary to formulate and evaluate a work stoppage plan in order to minimize the impact on users due to the stoppage of power equipment and to perform inspections and repairs at low cost and with appropriate personnel allocation.

As a method of formulating a work stoppage plan, extract time and date cross sections that satisfy the restrictions on system operation when equipment is stopped, select those with high achievement values at the time of work stoppage, and create a work stoppage plan. It is known how to For example, in Patent Document 1 below, "Work process generation mechanism for generating a work process for work involving the stoppage of power system equipment, operational constraints for each cross section of the work process generated by the work process generation mechanism From the reliability system planning mechanism that plans a system configuration that ensures system reliability by observing conditions, the work process generated by the work process generation mechanism, and the system configuration of each section planned by the reliability system planning machine An equipment shutdown plan evaluation mechanism for evaluating the determined equipment shutdown plan, and an equipment shutdown plan storage mechanism for storing the plan with the highest evaluation value among the equipment shutdown plans evaluated by the equipment shutdown plan evaluation mechanism It is disclosed that it is characterized by

As described above, in Patent Literature 1 below, a work stoppage plan is created by considering constraints on system operation, selecting a system state that satisfies those constraints when equipment is stopped.

Japanese Patent Application Laid-Open No. 2012-10501

In the future, as the introduction of renewable energy expands, it is conceivable that the predictability of system power flow will decline. In addition, as typified by connect and manage, it is conceivable that operational technology will advance and the constraints on system operation itself will change from moment to moment. In order to create a work suspension plan that takes into account the decrease in predictability of power flow and changes in constraints on system operation, it is necessary to consider the power system operation plan when creating the work suspension plan. .

However, in the conventional technology described above, the operation plan of the electric power system is not taken into account when creating the work stoppage plan. On the other hand, simply integrating the work stoppage plan and the operation plan would result in a huge search range, and it would take a huge amount of processing time to obtain a solution that takes into account the reduced predictability of power flow and changes in constraints on system operation. There is a problem of getting stuck.

SUMMARY OF THE INVENTION An object of the present invention is to provide a work stoppage planning support device and a work stoppage plan making that can create a work stoppage plan in consideration of an operation plan of an electric power system in a shorter time. One purpose is to provide a method of assistance.

In order to solve this problem, in one aspect of the present invention, a work suspension plan creation support device for supporting the creation of a work suspension plan for stopping power equipment of a power system due to work includes a power flow cross section of the power system a stoppage possibility search unit that searches for a stoppage possibility profile that can stop the power equipment while satisfying work stop requirements that define the stoppage requirements of the power equipment, and the stop obtained by the stoppage possibility search unit a reliability sufficiency determination unit that determines whether the system reliability in a possible cross section is reliability sufficiency or reliability violation; an operation policy application unit that outputs the first post-application stoppability cross-section to which the first operation policy candidate is applied to apply the first operation policy candidate for the above-mentioned Satisfying the work stoppage requirement based on the stoppage possibility cross section determined by the reliability sufficiency determining unit to correspond to the reliability sufficiency and the first post-application stopfailure cross section output by the operation policy application unit. and a requirement-satisfying cross-section group extraction unit for extracting requirement-satisfying cross-sections.

According to the present invention, for example, a work stoppage plan that takes into consideration the operation plan of the electric power system can be created in a shorter period of time.

FIG. 3 is a diagram showing a hardware configuration example of the work suspension plan creation support device and a configuration example of the entire power system according to the first embodiment; FIG. 2 is a diagram showing a functional configuration example of a work stoppage planning support device according to the first embodiment; FIG. 4 is a diagram showing a configuration example of a database that stores work stop requirements according to the first embodiment; 4 is a diagram showing a configuration example of a database that stores system data according to the first embodiment; FIG. 4 is a configuration example of a database that stores applied operation policies in Embodiment 1. FIG. 4 is a configuration example of a database that stores a group of operation policy candidates according to the first embodiment; FIG. 4 is a diagram showing a configuration example of a database that stores violation sections and violation details according to the first embodiment; 4 is a flow chart showing an example of overall processing of the work stoppage planning support device in the first embodiment; 6 is a flow chart showing an example of operation policy candidate application processing of the work suspension plan creation support device according to the first embodiment. FIG. 4 is a diagram showing a display example of the work stoppage planning support device according to the first embodiment; FIG. 10 is a diagram showing a functional configuration example of a work stoppage planning support device according to the second embodiment; 10 is a flow chart showing an example of overall processing of the work stoppage planning support device according to the second embodiment; FIG. 11 is a flowchart showing an example of operation policy candidate application processing of the work suspension plan creation support device according to the second embodiment; FIG. The figure which shows the functional structural example of the work stoppage plan preparation support apparatus in Example 3. FIG. FIG. 11 is a diagram showing a configuration example of a database that stores equipment stoppage cost data according to the third embodiment; FIG. 11 is a diagram showing a configuration example of a database that stores a group of operation policy candidates according to the third embodiment; 11 is a flow chart showing an example of overall processing of the work stoppage planning support device according to the third embodiment; 11 is a flow chart showing an example of operation policy candidate application processing of the work suspension plan creation support device according to the third embodiment. The figure which shows the functional structural example of the work stop plan preparation support apparatus in Example 4. FIG. FIG. 12 is a diagram showing a configuration example of a database that stores equipment change/maintenance costs in Embodiment 4; 14 is a flow chart showing an example of overall processing of the work stoppage plan creation support device according to the fourth embodiment;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or similar elements and processes are denoted by the same reference numerals, and redundant description is omitted. Further, in the embodiments described later, only differences from the previously described embodiments will be described, and redundant description will be omitted.

The following description of the embodiments and the configurations and processes shown in the respective drawings are intended to outline the embodiments to the extent necessary for understanding and implementing the present invention, and are intended to limit the embodiments according to the present invention. not intended to do so. Further, each embodiment and each modification can be combined in whole or in part without departing from the gist of the present invention and within a mutually compatible range.

In the following description, various information may be described in a table format, but the various information may be expressed in a data structure other than the table. The "aaa table" can also be called "aaa information" because it does not depend on the data structure. The "aaa table" or "aaa information" is stored in a storage area secured in a storage resource (for example, memory or storage).

In the following description, when collectively referring to multiple elements with the same number and a branch number added, such as "xxx100-1", "xxx100-2", "xxx100a", and "xxx100b" are expressed as "xxx100" using only the same number.

(Configuration of Work Stoppage Planning Support Device 10 and Power System of Embodiment 1)
FIG. 1 is a diagram showing a hardware configuration example of a work suspension plan creation support device 10 and a configuration example of the entire power system according to the first embodiment. The work suspension plan creation support device 10 is a device configured by, for example, a computer device, and assists creation of a work suspension plan for suspending power equipment and devices of a power system as work progresses.

The work suspension plan creation support device 10 includes an output unit 11, an input unit 12, a communication unit 13, a CPU (Central Processing Unit) 14, a memory 15, and a database 16 built in a storage device, which are connected via a bus 17. It is configured.

The output unit 11 includes, for example, at least one of a display device, a printer device, an audio output device, and the like. The input unit 12 includes, for example, at least one of a keyboard, a pointing device such as a mouse, a touch panel, and a voice instruction device.

The communication unit 13 has a circuit and communication protocol for connecting to a communication network. The CPU 14 may be configured as one or more semiconductor chips, or may be configured as a computer device such as a calculation server.

The memory 15 is configured as, for example, a RAM (Random Access Memory), and stores computer programs, calculation result data, image data, and the like required for each process. The screen data stored in the memory 15 is sent to the output section 11 and displayed.

In FIG. 1, the database 16 stores a power system 200 . The power system 200 is an example of information related to the configuration of the power system, and in this embodiment, the configuration and processing of the work suspension plan creation support device 10 will be described using the power system 200 as an example. The database 16 includes databases DB1 to DB6, which will be described later.

The electric power system 200 includes a power source 310 (310a, 310b), a photovoltaic power source 311 (311a), a bus 320 (320a, 320b, 320c, 320d, 320e, 320f), and a power transmission line (track) 330 (330a, 330b, 330c). , 330d, 330e, 330f) and loads 360 (360a, 360b, 360c) are main circuit components.

(Functional configuration of the work stoppage planning support device 10 of the first embodiment)
FIG. 2 is a diagram showing a functional configuration example of the work stoppage planning support device 10 according to the first embodiment. Users of the work stoppage planning support device 10 include power transmission and distribution companies, power distribution system managers, and the like.

The work suspension plan creation support device 10 includes databases DB1, DB2, DB3, DB4, DB5, and DB6.

The database DB1 contains work stoppage requirements D1 including constraints such as facility to be stopped, stoppage period, possibility of simultaneous stoppage, system reliability at the time of facility stoppage, and others (for example, KPI (Key Performance Indicator) in the power system). to store The database DB2 stores system data D2 including the system configuration for the planning period and details of each facility. The database DB3 stores an applied operation policy D3 that summarizes the operation policies to be applied during the work suspension plan target period. The database DB4 stores a violation avoidable threshold value D4 for determining whether or not the reliability violation can be avoided by adjusting the operation plan when the system reliability violation occurs. The database DB5 stores an operational policy candidate group D5 including various operational policies used for adjustment of the operational plan. The database DB6 stores violation sections/violation details D6 including stoppable sections that are reliability violations but can be avoided.

In addition, the work suspension plan creation support device 10 includes a cross-section generation unit 21, an analysis unit 22, a stoppable cross-section search unit 23, a reliability sufficiency determination unit 24, an operation policy application unit 25, a requirement sufficiency cross-section group extraction unit 26, and a display A part 27 is included.

The profile generation unit 21 receives the system data D2 and the applied operation policy D3, generates a time profile group of the target system by integrating the system data D2 and the applied operation policy D3, and outputs it to the analysis unit 22 . The time slice group of the target system obtained by integrating the system data D2 and the applied operation policy D3 refers to the time slice group of the target system obtained by applying the applied operation policy D3 to the system data D2. For example, the profile generation unit 21 is connected to the photovoltaic power source 311a of the supply and demand data table D202 shown in FIG. Generate a group of time slices in which the generated active power and generated reactive power of the bus 320c are corrected.

The analysis unit 22 performs various power flow calculations on the time cross section group generated by the cross section generation unit 21 and, if necessary, performs a predetermined KPI analysis. The KPI analysis result executed by the above is added and output to the stoppable cross-section searching unit 23 . Here, there are methods such as the direct current method and the alternating current method for the power flow calculation. KPIs analyzed by the analysis unit 22 include power transmission loss and system steady-state stability.

The stoppable cross-section search unit 23 searches for a stoppable cross-section where the stop target equipment can be stopped from the power flow cross-section group and the KPI analysis result obtained by the analysis unit 22 and the work stoppage requirement D1, and the reliability is satisfied. Output to the determination unit 24 . The search for a stoppable section is performed based on time constraints, but if necessary, specify predetermined conditions such as the upper limit, lower limit, and range of the KPI achievement value, and search for a stoppable section where the KPI satisfies the predetermined conditions. You can

The reliability sufficiency determination unit 24 calculates the system reliability R of the stoppable cross section obtained by the stoppable cross section search unit 23, and determines whether or not there is a reliability violation. System reliability R is calculated using well-known techniques. If system reliability R≧reference value C, the relevant stoppable cross section is reliable enough. If the reference value C>system reliability R≧violation avoidable threshold value D4, then the relevant stoppable section is a reliability violation, but there is a possibility that this violation can be avoided. If violation avoidable threshold value D4>system reliability R, the relevant stop possible cross section is reliability violation, and there is no possibility that reliability violation can be avoided.

The reliability sufficiency determination unit 24 outputs the reliability-satisfied stoppable cross-sections to the requirement-satisfaction cross-section group extraction unit 26 . In addition, the reliability sufficiency determination unit 24 outputs a stoppable cross section that is a reliability violation but can be avoided, a violation occurrence location, and a violation content to the database DB6 as a violation cross section/violation content D6. On the other hand, the reliability sufficiency determination unit 24 determines that there is no reliability improvement possibility and discards the stoppable cross-sections that violate the reliability and have no possibility of avoiding the violation.

The operation policy application unit 25 selects an operation policy for resolving the reliability violation from the operation policy candidate group D5 for the violation section/violation content D6, which is the determination result of the reliability sufficiency determination unit 24, and selects the operation policy candidate group D5. and perform load flow calculation and reliability sufficiency determination again. After the application of the operation policy, the operation policy application unit 25 outputs the stoppable cross-sections that could avoid the reliability violation together with the applied operation policy to the requirement-satisfaction cross-section group extraction unit 26, while the reliability violation could not be avoided. Discard the stoppable section.

The requirement-satisfaction cross-section group extraction unit 26 selects, from the stoppable cross-sections without reliability violation obtained by the reliability sufficiency determination unit 24 and the operation policy application unit 25, a requirement-satisfaction cross-section that can be stopped while satisfying the work stop requirement D1. A group is extracted and the result is output to the display unit 27 . The display unit 27 is an example of the output unit 11, and displays the content of the requirement-satisfying cross-section group obtained by the requirement-satisfying cross-section group extraction unit 26 in the form of a table or a graph to the operation planner. An example of the screen displayed on the display unit 27 will be described later.

Here, the work stoppage requirement D1, the system data D2, the applied operation policy D3, the cross-section generation unit 21, the analysis unit 22, and the stoppable cross-section search unit 23 may be configured by an existing system. Also, the applied operation policy D3 is an operation policy that is scheduled to be applied at the planning stage, and if there is no operation policy that is to be applied, the applied operation policy D3 can be omitted. Further, the applied operation policy D3 may be configured to reflect an operation policy included in the operation policy candidate group D5, for example, an operation policy that resolves the violation section/violation content D6 by the operation policy application unit 25. .

(Work stop requirement D1 in Example 1)
First, the work stop requirement D1 will be described. FIG. 3 is a diagram showing a configuration example of the database DB1 that stores the work stop requirement D1 according to the first embodiment. FIG. 3 exemplifies a stop target equipment/stop period data table D101 and a simultaneous stop possibility data table D102 included in the work stop requirement D1 stored in the database DB1.

The equipment to be stopped/suspension period data table D101 includes the conditions of the equipment to be stopped and the period of suspension. The simultaneous stop possibility/impossibility data table D102 includes combination patterns of target equipment that can be stopped.

For example, referring to the facility to be stopped/suspended period data table D101, it is indicated that the transmission line 330a must be stopped for three consecutive months. Further, referring to the simultaneous stop possibility data table D102, the power transmission lines 330a and 330b and the photovoltaic power source 311a can be stopped individually, and the power transmission lines 330a and 330b, and the power transmission line 330b and the photovoltaic power source 311 can be individually stopped. are shown to be capable of simultaneous termination. The work stop requirement D1 is saved, for example, in JSON format at the time of implementation.

(System data D2 of Example 1)
Next, system data D2 will be described. FIG. 4 is a diagram showing a configuration example of the database DB2 that stores the system data D2 according to the first embodiment. FIG. 4 illustrates an equipment data table D201 and a supply and demand data table D202 included in the system data D2 stored in the database DB2.

The facility data table D201 includes transmission capacity and transmission impedance as facility data of the power transmission line 330 at a certain point in the power system 200 . Here, "j" in the equipment data table D201 is an imaginary unit, and "pu" is a unit system symbol.

The supply and demand data table D202 records supply and demand data summarizing power generation (generated active power and generated reactive power) and demand (load active power and load reactive power) at a certain point in time in the power system 200 . FIG. 4 exemplifies the facility data table D201 and the supply and demand data table D202 at one date and time (for example, 2020/4/1 12:00) based on the prescribed time granularity, but the database DB2 stores A facility data table D201 and a demand/supply data table D202 are stored for a plurality of dates based on prescribed time granularity.

(Applied operation policy D3 of Example 1)
Next, the applied operation policy D3 will be described. FIG. 5 is a diagram showing a configuration example of the database DB3 that stores the applied operation policy D3 according to the first embodiment. FIG. 5 illustrates an applied operation policy data table D301 included in the applied operation policy D3 stored in the database DB3.

The applied operation policy data table D301 includes applied operation policies, implementation sections, implementation targets, and implementation details as operation measures to be implemented in the power system 200 during the work suspension plan target period. In the example of FIG. 5, an operation policy for suppressing the power generation amount of the photovoltaic power source 311a by 15% from 2021 to 2023 is shown. Here, in the item "details of execution contents" in FIG. 5, data having a structure composed of formulas, IDs, etc. is actually stored.

(Violation Avoidable Threshold D4 in Embodiment 1)
Next, the violation avoidable threshold value D4 will be described. The violation avoidable threshold value D4 stored in the database DB4 is used as a reliability threshold value for the reliability sufficiency determination unit 24 to determine whether or not it is a stop possible cross section of an avoidable reliability violation. It is a recorded number. The violation avoidable threshold D4 is given by the operation planner.

The database DB4 may store a reference value C for determining whether or not the reliability violation is reliability sufficiency, together with the violation avoidable threshold value D4. The reference value C is a general numerical value that indicates the criterion of reliability satisfaction, but may be given by the operation planner as well as the violation avoidable threshold value D4.

(Operation Policy Candidate Group D5 of Example 1)
Next, the operation policy candidate group D5 will be described. FIG. 6 is a diagram showing a configuration example of the database DB5 that stores the operation policy candidate group D5 according to the first embodiment. FIG. 6 illustrates an operational policy candidate group data table D501 included in the operational policy candidate group D5 stored in the database DB5. The operation policy candidate group D5 is for adjusting the operation plan so as to eliminate the reliability violation by applying it to the stoppable section of the reliability violation, as will be described later.

The operational policy candidate group data table D501 stores operational policy candidates, implementation methods of the operational policy candidates, and presence/absence of positive/negative contribution to each KPI determined by the operational planner. In FIG. 6, allowable current, voltage stabilization, transmission loss, failure rate, overload, and implementation cost are examples of KPIs determined by the operation planner. "+1" stored in association with each KPI of each operation policy candidate indicates that applying the corresponding operation policy candidate has a positive effect, that is, the KPI is improved, and "-1" indicates that the KPI is improved. , indicates that there is a negative effect, that is, the KPI is lowered by applying the relevant operational policy candidate.

Referring to FIG. 6, it can be seen that, for example, if the reliability violation is an overload, "replacement of generator output" or "application of N-1 shedding control" should be performed in order to eliminate the overload. FIG. 6 exemplifies "SVC introduction", "generator output transfer", and "N-1 shedding control application" as operation policy candidates, but is not limited to these. The operation policy candidate group D5 is created by an operation planner.

It should be noted that there may be a plurality of methods having the same effect but different implementation methods. For example, there are multiple generator output transfers as operation policy candidates, such as generator output transfer A, generator output transfer B, . There may be If the operation planner cannot create the operation policy candidate group D5, it may be generated from the past results of the operation policy.

(Violation cross section and violation content D6 of Example 1)
Next, the violation section/violation content D6 will be described. FIG. 7 is a diagram showing a configuration example of the database DB6 that stores the violation section/violation content D6 in the first embodiment. FIG. 7 illustrates a violation profile data table D601 and a violation content data table D602 included in the violation profile/violation details D6 stored in the database DB6. In the system cross section included in the violation cross section/violation content D6, the system reliability R is less than the reference value C and the reliability is violated, but since it is equal to or more than the violation avoidable threshold value D4, the operation policy candidate is applied. This is a cross section of the system that may improve the system reliability R, eliminate the violation, and satisfy the reliability.

The violation cross-section data table D601 records the occurrence time of the violation cross-section, the connection relationship of each bus line, the power flow rate, the phase, and the like. The connection relation of each bus line is indicated by "TO" for the bus line of the end point with respect to the bus line of the starting point. The information stored in the violation cross-section data table D601 is not limited to that illustrated in FIG. 7, and other information that is a calculation result executed by the analysis unit 22, which will be described later, may be stored. The violation content data table D602 records violation time, violation occurrence location, and violation content.

(Overall processing of the work stoppage planning support device 10 of the first embodiment)
FIG. 8 is a flow chart showing an example of overall processing of the work stoppage planning support device 10 according to the first embodiment. The process shown in FIG. 8 is executed in response to the operation planner inputting an execution instruction to the work suspension plan creation support device 10 .

First, in step S80, the work suspension plan creation support device 10 acquires the work suspension requirement D1, the system data D2, the applied operation policy D3, the violation avoidable threshold value D4, and the operation policy candidate group D5, and reads them into the memory 15. .

Next, in step S81, the profile generation unit 21 integrates the system data D2 and the applied operation policy D3, and generates a time profile group in a format that enables system analysis with a specified time granularity over a specified time width. In this embodiment, hourly system cross sections are generated for ten years.

Next, in step S82, the analysis unit 22 performs power flow calculation based on the system cross section generated in step S81. As described above, there are methods such as the DC method and the AC method for power flow calculation, but in this embodiment, the AC method is used.

Next, in step S83, the stoppable cross-section searching unit 23 searches for each of the simultaneous stop patterns stored in the simultaneous stop possibility data table D102 of the work stoppage requirement D1. (group of power flow cross sections) to extract equipment stoppable cross sections that can be stopped so as to satisfy the restrictions of the date and time shown in the stop target equipment/stop period data table D101. If necessary, specify the range of KPI values in addition to the restrictions on the date and time shown in the stop target equipment / stop period data table D101, and stop the equipment from the analyzed system cross section group (tidal flow cross section group) Extraction of possible cross sections may be performed.

Next, in step S84, the reliability sufficiency determination unit 24 performs system reliability calculation and predetermined KPI calculation for all of the equipment stoppage possible sections extracted in step S83. In this embodiment, transmission loss and system steady-state stability are considered as KPIs. For example, the power transmission loss P _loss for each equipment stoppage possible section is calculated by the following formula (1). In the following equation (1), "E" is the voltage of each bus, "R" is the resistance component (real part) of the transmission line between the buses, and .delta. is the phase. Moreover, S method is mentioned as a method of calculating|requiring system steady-state stability. In the following formula (1), i and j (i≠j) are indices indicating the busbars in one equipment stoppage possible cross section.

Next, in step S85, the reliability sufficiency determination unit 24 determines the system reliability R of each equipment stoppage possible section calculated in step S84. The reliability sufficiency determination unit 24 outputs to the requirement sufficiency cross-section group extraction unit 26 the equipment stoppage possible cross sections for which the system reliability R is equal to or higher than the reference value C, and the system reliability R is less than the reference value C, but there is a violation. Equipment stoppage possible cross sections that are equal to or greater than the avoidable threshold D4 are output to the database DB6 as violation cross sections/violation details D6. On the other hand, the reliability sufficiency determination unit 24 discards the equipment stoppage possible cross sections in which the system reliability R is less than the violation avoidable threshold value D4 as the equipment stoppage impossible cross sections (step S89).

Next, in step S86, the operation policy application unit 25 operates an operation policy candidate that may improve the system reliability R of the violation section included in the violation section/violation content D6 stored in the database DB6 in step S85. It is extracted from policy candidate group D5. Then, the operation policy application unit 25 applies the extracted operation policy candidate, improves the system reliability R to the reference value C or more, and sends the equipment stoppage possible cross sections that satisfy the reliability to the requirement satisfaction cross section group extraction unit 26. Output. In step S86, the operation plan is adjusted by applying the operation policy candidate for improving the system reliability R to the reference value C or higher to the equipment stoppage possible section. Details of step S86 will be described later.

Next, in step S87, the requirement sufficiency section group extraction unit 26 extracts the possible equipment stoppage section output from the reliability sufficiency determination unit 24 and the possible facility stoppage section after application of the operation policy output from the operation policy application unit 25. From among them, the equipment stoppage possible cross-section group that satisfies the condition of the stoppage period in the stoppage target equipment/stoppage period data table D101 of the work stoppage requirement D1 is extracted. The requirement-satisfaction section group extraction unit 26 sets the extracted facility stoppage possible section group as a work stop date candidate group.

Next, in step S88, the display unit 27 outputs the candidate work stop date group extracted in step S87 to the planned worker.

(Operation policy candidate application process of the first embodiment)
Next, with reference to FIG. 9, detailed processing of step S86 in FIG. 8 will be described. FIG. 9 is a flow chart showing an operation policy candidate application process example of the work suspension plan creation support device 10 according to the first embodiment.

First, in step S860, the operation policy application unit 25 selects an operation policy candidate to be applied to each possible equipment stoppage according to the content of the reliability violation of each possible equipment stoppage calculated in step S84 (see FIG. 8). It is selected from the operation policy candidate group D5. At this time, for example, if the reliability violation is an overload, "replace generator output" and "N -1 Electric control application” is selected as an operational policy candidate.

Next, in step S861, the operation policy application unit 25 applies the operation policy candidates selected in step S860 to each equipment stoppage possible section calculated in step S84. Application of each operational policy candidate follows the implementation method indicated in the operational policy candidate group data table D501. One or more operational strategies are applied to each possible outage cross section. In addition, an operation policy applied flag is set to the equipment stoppage possible cross-sectional data to which the operation policy has been applied, so that it is not judged and output again in the process of step S85 (see FIG. 8).

Next, in step S862, the operation policy application unit 25 performs various power flow calculations and reliability calculations on the possible equipment stoppage cross section to which the operation policy has been applied, generated in step S861. Each calculation method conforms to steps S82 and S84.

Next, in step S863, the operation policy application unit 25 determines the system reliability R of each equipment stoppage possible section calculated in step S862. The determination in step S863 conforms to step S85 (see FIG. 8), but in step S863, determination based on the violation avoidable threshold value D4 is not performed. In step S863, the operation policy application unit 25 outputs the reliability-satisfied equipment stoppage possibility cross section together with the data of the applied operation policy as a reliability satisfaction cross-section. The cross section is discarded as a section for which violation avoidance cannot be avoided even by applying the operation policy (step S865).

Since a plurality of operation policies may be applied to the same time slice, there may be a plurality of reliability sufficiency cross sections with different applied operation policies in the same time slice.

Next, in step S<b>864 , the operation policy application unit 25 outputs to the requirement-satisfaction cross-section group extraction unit 26 the system cross section group whose system reliability is satisfied by applying the operation policy.

(Display output of work stoppage plan creation support device 10 of embodiment 1)
FIG. 10 is a diagram showing a display example of the work stoppage planning support device 10 according to the first embodiment. As exemplified in FIG. 10, in the display 27a displayed on the display unit 27, when the power equipment to be stopped is selected from the pull-down menu 27a1, the period candidate and the operation policy candidate that can be stopped are displayed in the display area 27a2. be.

For example, as shown in FIG. 10, in the display area 27a2 when the transmission line 330a is selected from the pull-down menu 27a1, the "suspension candidate period" "2021/4/13 00:00-2021/7/13 24:00 ” indicates a period during which the power transmission line 330a can be stopped when “N-1 shedding application” or “SVC introduction” is performed as an “operation policy candidate”. This is because the system reliability R is determined to be less than the reference value C and equal to or greater than the violation avoidable threshold value D4 in the processing of step S85 of the overall processing of the work stoppage planning support device 10 (see FIG. 8), and the processing of step S86 is performed. By applying the operation policy candidate in , the system reliability R becomes equal to or higher than the reference value C, and the violation can be avoided. The candidate dates for work suspension obtained by avoiding violations are extended candidate dates for work suspension.

Further, for example, in the display area 27a2, the "suspension candidate period" "2023/5/1 00:00-2023/8/1 24:00" has "-" in the "applied operation policy" and "applied It shows the period during which the power transmission line 330a can be stopped even if the "operation policy" is not performed. This is an example of an equipment stoppage possible cross section for which the system reliability R is determined to be equal to or higher than the reference value C in the processing of step S85 of the overall processing of the work stoppage planning support device 10 (see FIG. 8).

In the first embodiment, regarding the system reliability, in addition to the possible stoppage cross section that satisfies the reliability, the operation policy candidates of the operation policy candidate group D5 among the stoppage possible cross sections that are equal to or higher than the violation avoidable threshold value D4 are applied to the system reliability. Extract the stoppable cross section that satisfies the degree. In this way, by adjusting the operation policy to be applied to the possible stoppage section narrowed down using the reference value of the system reliability and the violation avoidable threshold value D4, the work including the extended work stoppage candidate date Outage plans can be developed quickly with realistic processing times. In addition, the plan creator inputs the work suspension requirement D1, the system data D2, the applied operation policy D3, the violation avoidable threshold value D4, and the operation policy candidate group D5, thereby linking the work suspension plan and the operation plan. It is possible to reduce the labor of creating a work stoppage plan.

Example 2 differs from Example 1 in that the operation plan is adjusted so as to improve not only the system reliability but also the numerical value of the KPI emphasized by the operation planner. is.

In Example 1, the violation avoidable threshold value D4 is set for the system reliability R, and the operation plan is adjusted. In the second embodiment, a KPI threshold set by the operation planner is further provided, and the operation plan is adjusted so as to improve the KPI achievement value, thereby improving the KPI at the time of work stoppage. KPIs set by the operation planner include power transmission loss and capacity factor.

(Functional configuration of the work stoppage planning support device 10B of the second embodiment)
FIG. 11 is a diagram showing a functional configuration example of a work stoppage planning support device 10B according to the second embodiment. Compared to the work stoppage plan creation support device 10 (see FIG. 2) of the first embodiment, the work stoppage plan creation support device 10B is added with a database DB7 in which the KPI violation threshold value D7 is stored. The difference is that the unit 24 is replaced with a reliability KPI sufficiency determination unit 24B, and the operation policy application unit 25 is replaced with a KPI improvement operation policy application unit 25B. The database 16 includes databases DB1 to DB6 and DB7.

The database DB7 stores a KPI violation threshold value D7 that regards an achievement value V (hereinafter simply referred to as an achievement value V) of a KPI emphasized by an operation planner (hereinafter referred to as an important KPI) as a violation. A case where the achieved value V≧KPI violation threshold value D7 is called KPI satisfaction, and a case where the achieved value V<KPI violation threshold value D7 is called KPI violation. In this embodiment, it is assumed that power transmission loss and system steady-state stability are determined in advance as important KPIs. A KPI violation threshold D7 is provided by the operations planner.

The reliability KPI sufficiency determination unit 24B calculates the system reliability R and the achieved value V of the important KPI for the possible stoppage cross section obtained by the stoppage possible cross section search unit 23 . The reliability KPI sufficiency determination unit 24B determines whether or not there is a reliability violation and a KPI violation. Whether or not there is a reliability violation is determined by comparing the system reliability R and the violation avoidance possibility threshold value D4, similarly to the reliability sufficiency determination unit 24 of the first embodiment. If the achieved value V≧KPI violation threshold value D7, it is determined that there is no KPI violation, while if the achieved value V<KPI violation threshold value D7, it is determined that there is a KPI violation.

The reliability KPI sufficiency determination unit 24B outputs the reliability sufficiency cross sections that can be stopped to the requirement sufficiency cross section group extraction unit 26 . In addition, the reliability KPI sufficiency determination unit 24B outputs a stop possible cross section that is a reliability violation but can be avoided, a violation occurrence location, and a violation content to the database DB6 as a violation cross section/violation content D6. In addition, the reliability KPI sufficiency determining unit 24B outputs the stoppable section whose achieved value V is less than the KPI violation threshold value D7 to the database DB6 as a violation section/violation content D6. On the other hand, the reliability KPI sufficiency determination unit 24B determines that there is no possibility of reliability improvement and discards the stoppable cross-sections that violate the reliability and have no possibility of avoiding the violation.

The KPI improvement operation policy application unit 25B, for the violation cross section/violation content D6, which is the determination result of the reliability KPI sufficiency determination unit 24B, applies an operation policy and an operation policy to eliminate the violation cross section or improve the achieved value V of the important KPI. is selected from the operation policy candidate group D5 and applied, and power flow calculation, KPI calculation, reliability sufficiency determination, and KPI improvement determination are executed. After the application of the operation policy, the KPI improvement operation policy application unit 25B outputs cross-sections that satisfy the reliability and have an improved achieved value V compared to before the application of the operation policy, together with the applied operation policy, to the requirement-satisfaction cross-section group extraction unit 26. do. On the other hand, the KPI improvement operation policy application unit 25B discards the cross section in which the reliability violation could not be avoided and the cross section in which the reliability violation could be avoided but the achieved value V was not improved.

(Overall processing of the work stoppage planning support device 10B of the second embodiment)
FIG. 12 is a flow chart showing an example of overall processing of the work stoppage planning support device 10B according to the second embodiment. The overall process of the second embodiment shown in FIG. 12 differs from the overall process of the first embodiment shown in FIG. 8 in that step S85 is replaced with step S85B and step S86 is replaced with step S86B.

In step S85B following step S84, the reliability KPI sufficiency determination unit 24B determines the system reliability R and the achieved value V of the weighted KPI for each equipment stoppage possible cross section calculated in step S84. The reliability KPI sufficiency determination unit 24B outputs to the requirement-satisfaction cross-section group extraction unit 26 the equipment stoppage possible cross sections whose system reliability R is equal to or higher than the reference value C, and even though the system reliability R is less than the reference value C, it is possible to avoid violations. A possible facility stoppage section that is equal to or greater than the threshold value D4 and a possible facility stoppage section where the achieved value V is less than the KPI violation threshold value D7 are output to the database DB6 as a violation section/violation content D6. On the other hand, the reliability KPI sufficiency determination unit 24B discards the equipment stoppage possible cross section in which the system reliability R is less than the violation avoidable threshold value D4 as the equipment stoppage impossible cross section (step S89).

Next, in step S86B, the KPI improvement operation policy application unit 25B applies an operation policy to resolve the reliability violation of the violation cross section included in the violation cross section/violation content D6 stored in the database DB6 in step S85B, or determines the reliability. An operation policy that satisfies the requirement and improves the achieved value V is extracted from the candidate operation policy group D5. Then, the KPI improvement operation policy application unit 25B applies the extracted operation policy and compares the possible equipment stoppage cross section in which the system reliability R is improved to the reference value C or more and the achieved value V outputs the improved equipment stoppage possible cross section to the requirement satisfying cross section group extraction unit 26 .

(Operation policy candidate application process of the second embodiment)
Next, detailed processing of step S86B in FIG. 12 will be described with reference to FIG. FIG. 13 is a flow chart showing an operation policy candidate application process example of the work suspension plan creation support device 10B according to the second embodiment. In the operation policy candidate application process of the second embodiment shown in FIG. 13, step S862 is replaced with step S862B, and the The difference is that steps S863-1 and S865-1 are executed.

In step S862B subsequent to step S861, the KPI improvement operation policy application unit 25B performs various power flow calculations, reliability calculations, and weighted KPI calculations on the possible equipment stoppage cross section to which the operation policy has been applied generated in step S861. . Each calculation method conforms to steps S82 and S84.

In step S863-1 subsequent to step S863, the KPI improvement operation policy application unit 25B improves the achieved value V of the important KPI by applying the application operation policy in the reliability-satisfied equipment stoppage possible section output in step S863. It is determined whether or not The KPI-improved operation policy application unit 25B outputs the possible equipment stoppage cross section in which the achieved value V of the important KPI has been improved by applying the applied operation policy, while discarding the possible equipment stoppage cross section in which the achieved value V has not improved (step S865-1).

In the second embodiment, in addition to avoiding reliability violations, by applying the operation policy of the operation policy candidate group D5, a stop possible cross section that can improve the value of the important KPI that the operation planner emphasizes is extracted. In this way, by adjusting the operation policy to be applied, it is possible not only to obtain extended work stoppage candidate dates, but also to improve the KPI in system operation during equipment stoppage. In addition to the work stop requirement D1, the system data D2, the applied operation policy D3, the violation avoidable threshold value D4, and the operation policy candidate group D5, the plan creator inputs the data of the KPI violation threshold value D7. It is possible to link the suspension plan and the operation plan, and reduce the effort required to create the work suspension plan.

In comparison with Example 2, the third embodiment determines an appropriate manipulated variable to be used in the operation policy when extracting the operation policy to be applied to the violation cross section/violation details D6, and the facility stop cost is reduced. This is the same as the second embodiment except that the minimum work stoppage plan is created.

(Functional configuration of work stoppage plan creation support device 10C of embodiment 3)
FIG. 14 is a diagram showing a functional configuration example of a work stoppage planning support device 10C in the third embodiment. Compared with the work suspension plan creation support device 10B (see FIG. 11) of the second embodiment, the work suspension plan creation support device 10C converts the operation policy candidate group D5 to the operation policy candidate group D9, and the KPI improvement operation policy application unit 25B is replaced with a KPI improvement operation policy application unit 25C, and a database DB8 storing equipment stoppage costs D8, a stoppage cost calculation unit 28, and a work stoppage plan creation unit 29 are added. The database 16 includes databases DB1 to DB6, DB7, and DB8.

The database DB8 stores a facility stoppage cost D8 that indicates the cost required to stop each facility. FIG. 15 is a diagram showing a configuration example of the database DB8 that stores the equipment stoppage cost D8 according to the third embodiment. FIG. 15 exemplifies a facility suspension cost data table D801 included in the facility suspension cost D8 stored in the database DB8.

The equipment stoppage cost data table D801 includes combination patterns of equipment to be stopped and the total cost of personnel, preparation period, construction costs, etc. for executing equipment stoppage corresponding to each pattern. In the example shown in FIG. 15, a cost of 100 million yen is required to stop the transmission line 330a alone, and a cost of 120 million yen is required to simultaneously stop the transmission lines 330a and 330b. is. Although the facility stoppage cost data table D801 describes a fixed total cost regardless of the period, the cost is not limited to this and may be recorded for each divided period. The equipment stoppage cost D8 is created by the operation planner.

The database DB9 stores an operation policy candidate group D9. FIG. 16 is a diagram showing a configuration example of the database DB9 that stores the operation policy candidate group D9 according to the third embodiment. FIG. 16 illustrates an operational policy candidate group data table D901 included in the operational policy candidate group D9 stored in the database DB9.

Compared with the operational policy candidate group data table D501 of the operational policy candidate group D5 in the first and second embodiments, the operational policy candidate group data table D901 of the operational policy candidate group D9 is different from the operation policy implementation method of each operational policy. The equipment and manipulated variables are described, but the manipulated variables of the manipulated variables are not. The manipulated variable of the manipulated variable is calculated by the KPI improvement operation policy application unit 25C.

For example, in the example of FIG. 16, in the operation policy candidate of "SVC introduction", the facility to be operated is "SVC" and the manipulated variable is "SVC capacity". In addition, in the operation policy of "generator output transfer", the facility to be operated is the "generator" and the manipulated variable is the "output of the generator". In addition, in the operation policy of "N-1 shedding", the facility to be operated is the "transmission line" and the manipulated variable is the "transmission capacity of the transmission line".

The KPI improvement operation policy application unit 25C selects an operation policy for resolving the violation of the violation section/violation content D6 from the operation policy candidate group D9, and applies it to the violation section. After the application of the operation policy, the KPI improvement operation policy application unit 25C determines the cross section in which the reliability is satisfied and the achieved value V is improved compared to before the application of the operation policy. It is output to the requirement-satisfying section group extraction unit 26 together with the quantity. On the other hand, the KPI improvement operation policy application unit 25C discards the cross section for which the reliability violation could not be avoided.

The stoppage cost calculation unit 28 refers to the equipment stoppage cost data table D801 of the equipment stoppage cost D8, and calculates the corresponding cost Give data and output. The work stoppage plan creating unit 29 generates, for example, a work stoppage plan that minimizes the cost based on the requirement satisfaction cross-section group to which the cost data is attached, which is the output of the stop cost calculation unit 28, and displays it to the display unit 27. Output.

(Overall processing of the work stoppage planning support device 10C of the third embodiment)
FIG. 17 is a flow chart showing an example of overall processing of the work stoppage planning support device 10C according to the third embodiment. In the overall processing of the third embodiment shown in FIG. 17, step S86B is replaced with step S86C, and steps S87-1 and S87 are replaced between steps S87 and S88 in comparison with the overall processing of the second embodiment shown in FIG. The difference is that -2 is executed.

Next, in step S86C, the KPI improvement operation policy application unit 25C applies an operation policy for resolving the reliability violation of the violation section included in the violation section/violation content D6 stored in the database DB6 in step S85B, or determines the reliability. An operation policy that satisfies and improves the achieved value V is extracted from the operation policy candidate group D9, and the manipulated variable of the manipulated variable of the equipment targeted by the extracted operation policy is determined. Then, the KPI improvement operation policy application unit 25C applies the extracted operation policy and the manipulated variable of the determined manipulated variable, and applies the equipment stoppage possible cross section in which the system reliability R is improved to the reference value C or higher, and the operation policy. The facility stoppage possible cross section with improved achievement value V compared with the previous one is output to the requirement satisfying cross section group extraction unit 26 .

In step S87-1 following step S87, the stoppage cost calculation unit 28 calculates the cost data stored in the equipment stoppage cost data table D801 for the equipment stoppage possible section group for each piece of equipment extracted in step S87. Give. Next, in step S87-2, the work stoppage plan creating section 29 creates a work stoppage plan from the work stoppage requirement cross-section group to which the cost data is assigned, according to a certain standard. An example of one criterion is minimizing the cost of outages. When formulating a work stoppage plan that covers equipment that requires work stoppage so as to minimize the cost of equipment stoppage, the following equations (3) to (5) are used as constraints, and equation (2) is optimized. you should solve the problem.

Here, in equations (2) to (5), i and j (i≠j) are facility numbers. Also, in equations (2) to (5), cost _i is the cost of the i-th work suspension candidate. In equations (2) to (5), x _i is a variable that is 1 when the i-th candidate is selected and 0 otherwise.

In Expression (3), Facility_list is a list of equipment that requires work stoppage, and is a list listing "facility to be stopped" in the facility to be stopped/suspension period data table D101 of the work stoppage requirement D1. In the example of FIG. 3, Facility_list is "330a, 330b, 311a, ...", and length (Facility_list) represents the length of Facility_list, that is, the number of elements.

Also, in Expression (4), timelist _i is a list of equipment stoppage possible cross-section groups in which the i-th candidate equipment stops. Expression (4) expresses a time constraint in which no stop not described in the simultaneous stop possibility data table D102 is performed (no stop condition violation occurs).

Also, in Expression (5), targetnumber _i is a list of equipment numbers targeted by the i-th candidate equipment to be stopped. Equation (5) expresses a constraint that the same facility is stopped only once.

(Operation policy candidate application process of the third embodiment)
Next, with reference to FIG. 18, detailed processing of step S86C in FIG. 17 will be described. FIG. 18 is a flow chart showing an operation policy candidate application process example of the work suspension plan creation support device 10C according to the third embodiment. In the candidate operation policy application process of the third embodiment shown in FIG. 18, step S862B is replaced with step S862C, and the The difference is that step S861-1 is executed.

In step S861-1 following step S861, the KPI-improving operation policy application unit 25C sets the operation variable The power flow calculation is performed while operating , and the manipulated variables and the power flow state are determined. OPF (Optimized Power Flow) is an example of a method for determining the manipulated variables of manipulated variables. Also, the power flow calculation method in step S861-1 conforms to step S82 of the first embodiment (see FIG. 8).

In step S862C following step S861-1, the KPI improvement operation policy application unit 25C calculates reliability and important KPI for the power flow cross section obtained in step S861-1. The calculation method of step S862C conforms to step S84 of the first embodiment (see FIG. 8).

In Example 3, a stop possible cross-section is extracted that can avoid reliability violations or improve the numerical values of important KPIs and minimize the stoppage cost of equipment. In this way, by extracting a possible stoppage cross section that can minimize the stoppage cost of equipment based on data and algorithms based on clear criteria, the validity of the work stoppage plan, or the work stoppage plan It is possible to improve the explainability of the basis for the planning of

In addition, in the third embodiment, since the manipulated variables of the operation policy to be applied to the violation section/violation content D6 are appropriately determined, the application of the operation policy for reliability violation avoidance or KPI improvement can be performed flexibly and effectively. can be done systematically.

As described above, the work suspension plan creation support device 10C of the third embodiment is the operation variable used in the operation policy applied to the violation section/violation content D6 in the work suspension plan creation support device 10B of the second embodiment. and a function to create a work stoppage plan that minimizes the equipment stoppage cost. However, not limited to this, the work suspension plan creation support device 10 of the first embodiment has a function to determine the manipulated variable of the manipulated variable used in the operation policy applied to the violation section/violation content D6, and/or equipment It is also possible to implement a work stoppage plan creation support device with an added function of creating a work stoppage plan that minimizes the stoppage cost.

Example 4 differs from Example 3 in that it creates a work stoppage plan that minimizes all costs related to equipment, work stoppages, and operational measures, and is otherwise the same as Example 3.

(Functional configuration of work stoppage plan creation support device 10D of embodiment 4)
FIG. 19 is a diagram illustrating a functional configuration example of a work stoppage plan creation support device 10D according to the fourth embodiment. Compared to the work stoppage plan creation support device 10C (see FIG. 14) of the third embodiment, the work stoppage plan creation support device 10D is different from the work stoppage plan creation support device 10C in that the stop cost calculation unit 28 is replaced with a plan cost calculation unit 28D, and the operation adjustment unit 30 is The difference is that a database DB10 has been added and stores facility change/maintenance costs D10. The database 16 includes databases DB1 to DB6, DB7 to DB9, and DB10.

The operation adjustment unit 30 outputs from the KPI improvement operation policy application unit 25C, after the application of the operation policy, the cross section that satisfies the reliability and has improved the KPI achievement value V compared to before the application of the operation policy. The KPI at the time of application of the operation policy that maximizes the KPI improvement effect over a predetermined period and the predetermined period is calculated and output to the requirement-satisfying cross-section group extraction unit 26 .

For example, the function of the operation adjustment unit 30 will be described using a case where the operation policy is "SVC introduction". When the target facility is stopped, the SVC is added and used, and even after the target facility is restarted, the added SVC will continue to be used. Therefore, the operation adjustment unit 30 determines the achievement value of the comprehensive KPI (hereinafter referred to as operation KPI) over a predetermined period including the time when the target equipment is stopped (when the operation policy is applied) and after it is restarted (after application). Then, the application timing of the operation policy that maximizes the achieved value of the operation KPI is calculated. That is, the operation adjustment unit 30 adjusts the application timing of the operation policy so that the achieved value of the operation KPI becomes the best not only when the target equipment is stopped but also after the stoppage is cancelled.

When calculating the application timing of the operation policy, the operation adjustment unit 30 is not limited to the application timing when the operation KPI is the best. You can calculate the time.

Based on the facility change/maintenance cost D10, the facility stoppage cost D8, the requirement satisfaction section group output from the requirement satisfaction section group extraction section 26, and the operation KPI, the plan cost calculation section 28D , the total cost is calculated for each requirement-satisfying section group and the operation plan/equipment plan to which the aforementioned predetermined period including this requirement-satisfying section group belongs, and the result is output to the work stoppage plan creation unit 29 .

The work stoppage plan creation unit 29 generates a work stoppage plan that minimizes the total cost based on the requirement satisfaction section group to which the total cost is assigned, which is the output of the planned cost calculation unit 28D, and displays it on the display unit. 27.

(Equipment change/maintenance cost D10 in Example 4)
FIG. 20 is a diagram showing a configuration example of the database DB10 that stores the facility change/maintenance costs D10 according to the fourth embodiment. FIG. 20 illustrates an equipment change/maintenance cost table D1001 included in the equipment change/maintenance cost D10 stored in the database DB10.

The equipment change/maintenance cost table D1001 records the new construction cost, the retirement cost, the date and time when these are implemented, and the maintenance cost per year for each piece of equipment. In the example of FIG. 20, it is shown that the annual maintenance cost of the transmission line 330a is 5 million yen, and that the transmission line 330b will cost 200 million yen when it is removed in 2025. In addition, future new facilities determined in the facility plan for a predetermined period are also included, and the transmission line 330g is newly installed in 2028, and the new installation cost is 400 million yen.

In addition, the equipment change/maintenance cost table D1001 also records data about the application cost of an operation policy, such as SVC expansion, in the operation policy candidate group D9. In the example of FIG. 20, the installation cost and the maintenance cost are fixed regardless of the period, but the cost is not limited to this, and the cost may be determined so that the cost changes over time. The facility change/maintenance cost D10 is created by the facility planner.

(Overall processing of the work stoppage planning support device 10D of the fourth embodiment)
FIG. 21 is a flow chart showing an example of overall processing of the work stoppage planning support device 10D according to the fourth embodiment. In the overall processing of the fourth embodiment shown in FIG. 21, step S87-1 is replaced with step S87-1a in comparison with the overall processing of the third embodiment shown in FIG. The difference is that -1 is executed.

Following step S86C, in step S86-1, the operation adjustment unit 30 applies the operation policy to the cross section at the time of shutdown and determines the application timing for applying the operation policy to the cross section for which the KPI has been improved or the reliability violation has been resolved. Then, the application period and the operation KPI for a predetermined period based on the application period are output to the requirement-satisfaction cross-section group extraction unit 26 .

In step S87-1a following step S87, the planned cost calculation unit 28D calculates the total sum of the numerical values of the cost-converted KPIs among the facility installation/removal/maintenance costs, the work stoppage costs, and the KPIs of the operation policy. , the group of sections satisfying the work stoppage requirement and the operation plan and equipment plan for a predetermined period linked thereto. Among the KPIs of the operation policy, KPIs for cost conversion include, for example, power transmission loss. The planned cost calculation unit 28D gives the total cost as cost data to the equipment stoppage possible cross-section group extracted in step S87.

In Example 4, in addition to avoiding reliability violations or improving the numerical values of important KPIs, the total cost including new installation/removal/maintenance costs of facilities converted to costs, work stoppage costs, and KPIs for operation plans Extract a stoppable cross-section that can minimize In this way, by extracting a possible stop section that can minimize the total cost, it is possible to reduce the cost of the entire system planning. Further, by standardizing the data types of the equipment stoppage cost D8 and the equipment change/maintenance cost D10 and the databases DB8 and DB10, it is possible to achieve smooth cooperation between the operation planner and the equipment planner.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Also, as long as there is no contradiction, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, replace, integrate, or distribute a part of the configuration of each embodiment. Also, the configuration and processing shown in the embodiments can be appropriately distributed or integrated based on processing efficiency or implementation efficiency.

10, 10B, 10C, 10D: work suspension plan creation support device, 21: section generation unit, 22: analysis unit, 23: stoppable section search unit, 24: reliability sufficiency determination unit, 24B: reliability KPI sufficiency determination unit , 25: Operation policy application unit, 25B, 25C: KPI improvement operation policy application unit, 26: Requirement satisfaction section group extraction unit, 27: Display unit, 28: Stop cost calculation unit, 28D: Planning cost calculation unit, 29: Work Suspension plan creation unit 30: Operation adjustment unit 200: Electric power system D1: Work suspension requirement D2: System data D3: Applied operation policy D4: Violation avoidable threshold D5: Operation policy candidate group D6 : Violation cross section/violation details, D7: KPI violation threshold, D8: equipment stoppage cost, D9: operation policy candidate group, D10: equipment change/maintenance cost

Claims (12)

A work suspension plan creation support device for supporting creation of a work suspension plan for stopping power equipment of a power system along with work,
a stoppability cross-section search unit that searches for a stoppability cross-section that can stop the power equipment while satisfying work stop requirements that define the stoppage requirements of the power equipment, from the power flow cross-section of the power system;
a reliability sufficiency determination unit that determines whether the system reliability in the stoppable cross section obtained by the stoppable cross section is reliability sufficiency or reliability violation;
After applying the first operation policy candidate for resolving the reliability violation to the stoppable section corresponding to the reliability violation, when the first stoppable section corresponds to the reliability satisfaction , an operational policy application unit that outputs the stoppable cross section after the first application;
Satisfying the work stoppage requirement based on the stoppage possibility cross section determined by the reliability sufficiency determination unit to correspond to the reliability sufficiency and the first post-application stopfailure cross section output by the operation policy application unit. and a requirement-satisfaction cross-section group extraction unit for extracting a requirement-satisfaction cross-section to be used. 2. The work suspension plan creation support according to claim 1, further comprising: a cross section generation unit that generates the power flow cross section from system data of the power system and an operation policy applied to the system data. Device. The stoppable cross-section searching unit
2. The method according to claim 1, wherein from the power flow cross section, the stop possible cross section that satisfies the work stop requirement and a predetermined KPI (Key Performance Indicator) in the power system satisfies a predetermined condition is searched. Work stoppage planning support device. The reliability sufficiency is when the system reliability is greater than or equal to a reference value,
The reliability violation is when the system reliability is less than the reference value,
The reliability sufficiency determination unit,
Determining a reliability violation with a possibility of violation avoidance when the system reliability in the stoppable cross section is the reliability violation and is equal to or greater than a first threshold,
The operational policy application unit,
When the first post-application stoppable section obtained by applying the first operational policy candidate to the stoppable section corresponding to the reliability violation with the possibility of violation avoidance corresponds to the reliability satisfaction, The work stoppage planning support device according to claim 1, wherein the work stoppable cross section after the first application is output. 2. The work stoppage planning support device according to claim 1, further comprising a display unit for displaying the requirement satisfying cross-sections extracted by the requirement satisfying cross-section group extraction unit. The reliability sufficiency determination unit,
It is determined whether the achievement value of a predetermined KPI (Key Performance Indicator) in the stoppable section is less than a second threshold, and if the achievement value is less than the second threshold, the KPI is violated. determined as
The operational policy application unit,
A second post-application stoppable section in which a second operation policy candidate for improving the achieved value is applied to the stoppable section that corresponds to the KPI violation corresponds to the reliability satisfaction and the second 2. The work suspension plan creation support device according to claim 1, wherein when there is an improvement in the achieved value compared to before the application of the candidate operation policy, the cross section that can be suspended after the second application is output. . With respect to the second post-application stoppable cross section output from the operational policy application unit, the second 7. The work stoppage planning support device according to claim 6, further comprising: an operation adjustment unit that adjusts the application timing of the second operation policy candidate. The operational policy application unit,
When applying the first operational policy candidate or the second operational policy candidate to the stoppable section, the operation amount of the device targeted by the first operational policy candidate or the second operational policy candidate 7. The work stoppage planning support device according to claim 6, wherein: a cost calculation unit that calculates a cost of the requirement-satisfaction cross-section extracted by the requirement-satisfaction cross-section group extraction unit;
7. The work stoppage plan creation support device according to claim 6, further comprising: a work stoppage plan creation unit that creates the work stoppage plan based on the cost calculated by the cost calculation unit. The work stoppage planning support device according to claim 9, wherein the cost includes a stoppage cost of the power equipment. The costs include installation, removal, and maintenance costs of the power equipment, and application costs when applying the first operation policy candidate or the second operation policy candidate to the stoppable section. 11. The work stoppage planning support device according to claim 10. A work suspension plan creation support method for assisting creation of a work suspension plan for stopping power equipment of a power system along with work,
The work stoppage plan creation support device
From the power flow cross section of the power system, search for a stop possible cross section that can stop the power equipment while satisfying work stop requirements that define the stop requirements of the power equipment,
Determining whether the system reliability in the stoppable cross section obtained by the search is reliability satisfaction or reliability violation,
After applying the first operation policy candidate for resolving the reliability violation to the stoppable section corresponding to the reliability violation, when the first stoppable section corresponds to the reliability satisfaction , outputting the stop-able profile after the first application;
including each process of extracting a requirement-satisfaction cross-section that satisfies the work stop requirement from the stop-feasible cross-section determined to satisfy the reliability level and the output first post-application stop-feasible cross-section; A work stoppage plan creation support method characterized by:

Images