JP5493170B2 - Recovery work planning system, blackout work planning method and program - Google Patents

Description

  The present invention relates to a recovery work planning system, a power outage work planning method, and a program.

  As is well known, the demand for electricity in Japan continues to increase. With the increase in power demand, power facilities such as generators, transformers, and transmission lines have been enhanced, and the scale of the power system has become very complex. On the other hand, as international competition intensifies with the globalization of the economy, electricity prices are required to be as low as in the United States and Europe, and the principle of competition has begun to be introduced in the electricity market due to deregulation. Against this backdrop of the times, electric power companies and the like have been demanded to promote the streamlining of electric power equipment and provide the maximum service with the minimum equipment.

JP-A-8-322149

  While it is necessary to respond to social demands in this way, electric power companies and the like must carry out operations such as expansion, improvement, repair, and inspection of power facilities in order to stably supply power. Here, when performing these operations, it is necessary to stop the function of the power equipment (hereinafter referred to as “power failure operation”). During this power failure operation, system switching, lightning timing and heavy load timing. In consideration of various circumstances such as restrictions on the work and reduction of work stoppage time due to synchronized work, a work plan (hereinafter referred to as “power outage work plan”) is made so as to suppress the influence of power outage work on consumers and the like as much as possible. There is a need.

  However, the power outage work plan must deal with a huge amount of power equipment and restrictions, and this requires a great deal of labor and extensive knowledge and experience. Therefore, in an electric power company or the like that maintains the power system, a system that is effective for a power outage work plan that can efficiently make a power outage work plan with high supply reliability is required.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a power failure work planning system, a power failure work planning method, and a program capable of efficiently creating an optimal power failure work plan.

  A main invention of the present invention for solving the above problems is a power failure work planning system used for a power failure work plan of a power system composed of a plurality of power facilities, and is a power failure that is a target of power failure work. A designation means for accepting designation of a target facility; and a work system candidate generation means for generating a work system candidate comprising a combination of states of the power equipment in the power system, wherein the power failure target equipment is in a power failure state in the power system. And N-1 system generation means for generating an N-1 system that is a power system in which at least one of the power facilities other than the power outage target facility is in a power outage state, and each work system candidate. In accordance with whether or not all of the corresponding N-1 systems satisfy a predetermined operation constraint, it is determined whether or not the work system candidate can be operated. When the availability determination means and the operable work system candidates do not exist, the N-1 systems corresponding to the work system candidates that do not satisfy the operation restrictions are not N Among other power systems different from the -1 system, the number of states of the power facilities in the N-1 system and the states of the power facilities in the other power systems is less than a predetermined value. When a certain recovery target system candidate is extracted, and there is a recovery target system candidate that satisfies the operation constraints, the recovery system that determines that the work system candidate is operable and the operational system that can be operated And a work plan determining means for determining a work system to be adopted as the power outage work plan.

  Further, the power outage work planning system of the present invention includes storage means for storing reliability information for calculating supply reliability of the power system in association with information for specifying the power equipment, the work system candidates, and For each of the N-1 systems, a supply reliability determination unit that determines a supply reliability based on information about each power facility stored in the storage unit, and the operation availability determination unit includes: According to the supply reliability of the work system candidate, it is determined whether or not the work system candidate can be operated, and the restoration unit determines whether the N-1 system is in operation restriction according to the supply reliability of the N-1 system. It may be determined whether or not the above is satisfied.

  Further, the power failure work planning system of the present invention comprises storage means for storing reliability information for calculating supply reliability of the power system in association with information for specifying the power equipment, and the resurrection means is The supply reliability is calculated for a recovery target system candidate that satisfies the operation constraints, the recovery target system candidate having the highest supply reliability is determined as a recovery target system, and the storage means includes the N-1 system. The recovery target system may be stored in association with each other.

  Another aspect of the present invention is a power outage work planning method used for a power outage work plan of a power system composed of a plurality of power equipments, wherein the computer is a power outage target for power outage work. Accepting designation of equipment, generating a work system candidate consisting of a combination of the states of the power equipment in the power system, where the power outage target equipment is in a power outage state in the power system, for each work system candidate, An N-1 system that is a power system in which at least one of the power facilities other than the power failure target equipment is in a power outage state is generated, and for each of the work system candidates, all of the corresponding N-1 systems have predetermined operation restrictions. It is determined whether or not the work system candidate can be operated according to whether or not the work system candidate is satisfied. Among the N-1 systems that do not satisfy the operational constraint, among other power systems that are different from the N-1 system that does not satisfy the operational constraint, the state of each power facility in the N-1 system When a recovery target system candidate in which the number of states different from the state of each power facility in the other power system is less than or equal to a predetermined value is extracted, and among the recovery target system candidates that satisfy the operation constraints exist The work system candidate is determined to be operable, and the work system to be adopted as the power outage work plan is determined from the operational work systems.

  Another aspect of the present invention is a program used for a power outage work plan of a power system composed of a plurality of power equipments, and the computer designates a power outage target equipment that is a power equipment subject to power outage work The step of accepting, the step of generating a work system candidate consisting of a combination of the states of the power equipment in the power system, where the power failure target equipment is in a power outage state in the power system, and each work system candidate, A step of generating an N-1 system that is a power system in which at least one of the power facilities other than the power failure target facility is in a power outage state, and for each of the work system candidates, all of the corresponding N-1 systems are predetermined. A step of determining whether or not the work system candidate can be operated according to whether or not an operation constraint is satisfied; Among the other power systems different from the N-1 system that does not satisfy the operation constraints, the N-1 systems corresponding to the work system candidates that do not satisfy the operation restrictions A recovery target system candidate in which the number of different states of the power facilities in the N-1 system and the states of the power facilities in the other power systems is equal to or less than a predetermined value is extracted, and the recovery target system candidates Determining that the candidate work system is operable, and determining a work system to be adopted as a power outage work plan from the operable work systems; , Are executed.

  Other problems and solutions to be disclosed by the present application will be made clear by the embodiments of the invention and the drawings.

  According to the present invention, an optimal power outage work plan can be made efficiently.

It is a figure showing information processor 200 which realizes a power failure work planning system concerning one embodiment of the present invention. It is a figure explaining the flow of the process performed by the power failure work planning system which concerns on one Embodiment of this invention. It is a figure which shows an example of an electric power grid | system. It is a figure which shows an example of an electric power grid | system. It is a figure which shows an example of an electric power grid | system. It is a figure which shows the flow of a restoration process of a work system candidate. It is a figure which shows the flow of the process which checks the presence or absence of accident countermeasures. It is a figure for demonstrating the Hamming distance between systems. It is a figure which shows an example of an electric power grid | system. It is a figure which shows the example of the state transition of an electric power grid | system. It is a figure explaining the flow of a process which outputs an operation slip. It is a figure which shows the example of the state of each electric power installation in each of a normal system and a work system | strain. It is a figure which shows the transition from a regular system to a work system.

  Hereinafter, a power failure work planning system according to an embodiment of the present invention will be described in detail with reference to the drawings.

== System overview ==
The power failure work planning system is used for system switching procedure planning in a power failure work plan with high supply reliability so that the supply reliability is maximized within the work plan period. Here, the supply reliability is an index indicating the stability of the power. For example, when the function of the power facility is stopped due to a power failure operation, the redundancy of the power system is lowered, and thereby the supply reliability is lowered. become. As indicators of supply reliability, there are the number of power outages and power outage hours on the customer side. Further, the supply reliability index on the supplier side includes a supply reserve rate and a power shortage probability in the power supply department, adequacy and security in the power transmission and distribution department, and the like. Adequacy is a measure of the power system's ability to supply power without causing any abnormality in the power system, taking into account operational constraints of the power equipment that constitutes the power system. is there. These indexes are evaluated for each power facility or as a value (total or average) of the entire power system.

  In the power failure work planning system according to the present embodiment, in order to quantify the supply reliability, N-2 supply trouble power, N-2 overload power, N-2 margin power amount, etc. are used as indicators of supply reliability. Is used. Here, the case where one of the components of the power system stops functioning due to an accident or the like is N-1, and the case where two of the power facilities stop functioning is N-2. In general, the concept of equipment configuration assuming N-1 is called the N-1 standard. The N-2 standard assumes a more severe accident. The N-2 standard is a standard adopted when a higher level of reliability is required than N-1. General power equipment is created in accordance with the N-1 standard. In this embodiment, the N-2 standard is used in principle. However, as will be described later, the priority order of work system candidates to be adopted cannot always be completely ordered only by the N-2 standard. Therefore, in such a case, higher standards such as N-3 standard, N-4 standard,.

  The N-2 supply hindering power described above in the N-2 standard is a power hindering power supply when two power facilities out of the power facilities constituting the power system have stopped functioning due to an accident or the like. Supply hindering power includes power that is completely interrupted to the load and power that is not completely interrupted but is less than the power required for the load. included. In the present embodiment, as the N-2 supply hindrance power, the sum of the supply hindrance power of each load for all power system variations in which the functions of the two power facilities are stopped, or the total is the number of variations. The average value divided is used. The less reliable supply power, the higher the supply reliability.

  Among the N-2 standards, the N-2 overload amount described above does not stop the function when two power facilities of the power facilities constituting the power system are stopped due to an accident or the like. This is the amount of overload power flowing beyond the rated capacity to other power facilities. In the present embodiment, similar to the N-2 supply hindering power, the sum of the N-2 overload amounts of each power facility for all variations of the power system in which the functions of the two power facilities are stopped, or the above An average value obtained by dividing the sum by the number of variations is adopted. The smaller the overload amount, the higher the supply reliability.

  Among the N-2 standards, the above-mentioned N-2 marginal power amount does not stop the function when two of the power facilities constituting the power system have stopped functioning due to an accident or the like. It is the difference between the rated capacity of power in another power facility and the amount of power transmitted in that power facility. The greater the N-2 margin power amount, the higher the supply reliability.

  The supply reliability is not limited to that described above, and other indexes indicating the stability of power can be appropriately adopted.

== Information processing device ==
FIG. 1 shows an information processing apparatus 200 that realizes a power failure work planning system according to this embodiment. The CPU 201 is responsible for overall control of the information processing apparatus 200. By executing the program 202c stored in the memory 202 or the storage device 208 as storage means, the power failure work planning system function, database function, and the like are realized. To do. The recording medium reading device 204 is a device for reading a program and data recorded on the recording medium 207. The read program and data are stored in the memory 202 and the storage device 208. Therefore, for example, the program 202c for realizing the function of the power failure work planning system recorded in the recording medium 207 is read from the recording medium 207 using the recording medium reading device 204 and stored in the memory 202 or the storage device 208. Can be. For example, data stored in the above-described database is stored in the memory 202 or the storage device 208. As the recording medium 207, a flexible disk, CD-ROM, DVD-ROM / RAM, DVD-RAM / RAM, semiconductor memory, or the like can be used.

  The recording medium reading device 204 can be built in the information processing device 200 or can be externally attached. The storage device 208 is, for example, a hard disk device, a flexible disk device, a semiconductor storage device, or the like. The input device 205 is used for data input to the information processing apparatus 200 by an operator or the like. For example, a keyboard or a mouse is used as the input device 205. The output device 206 is a device for outputting information to the outside. For example, a display or a printer is used as the output device 206. The communication interface 203 is an interface for connecting the information processing apparatus 200 to an external network such as a LAN. The information processing apparatus 200 can communicate with an external apparatus such as another computer via the communication interface 203.

== Work system determination process ==
The power failure work planning system is provided by a program that operates on the information processing apparatus 200 described above. In the information processing apparatus 200, a database for storing various data is operating. In this database, for example, information (eg, power consumption, rated power, transmission capacity, power loss, etc.) relating to the configuration of the power system and the power facilities constituting the power system that are the targets of the system switching procedure plan (described above) Information for calculating supply reliability, hereinafter referred to as reliability information) is stored. In addition, various data used in the processes described below are appropriately stored in this database.

  FIG. 2 shows a flowchart for explaining the flow of processing executed by the power failure work planning system. This process includes: Work system candidate generation processing (I), 2. 2. System operation constraint judgment processing (II) Three processes of the system configuration combination process (III) are included. Hereinafter, each of these processes will be described in detail.

== 1. Work system candidate generation processing (I) ==
In the work system candidate generation process (I), a candidate (hereinafter referred to as a “work system candidate”) of the state of each power facility in the power system (hereinafter referred to as “work system”) used in a process subsequent to the process. ) Is generated. The generated work system candidates are stored in the database of the information processing apparatus 200. The work system candidate generation process (I) includes processes such as a reduced system generation process (S311), a detailed system generation process (S312), a power outage facility combination process (S313), and a candidate generation process (S314). It is.

  In the reduced system generation process (S311), a state that satisfies the power outage work request (hereinafter referred to as “reduced system”) is generated. The number of power system states can be calculated as 2b [b: number of power facilities (for example, number of power transmission lines + number of transformers)] because each power facility can take two states of energization and power failure. It becomes a huge number. Therefore, in this embodiment, two restrictions are imposed to narrow down the number of states of the power system to be processed. One of them is to treat the same power equipment as a single power equipment when the power equipment has a redundant configuration (hereinafter referred to as “contraction”). For example, when the same electrical station (power plant, substation, etc.) is composed of a plurality of transmission lines, these multiple lines are handled as one power facility. When the same power equipment (bus) is composed of a plurality of transformers, the plurality of transformers are handled as one power equipment. By imposing such restrictions, the amount of calculation can be reduced without substantially reducing the accuracy of optimization.

Ｍ＝1,2,…,ＭＭ，Ｎ＝1,2,…,ＭＮ The second restriction is to narrow down the working system candidates to be adopted to a configuration (periphery) that approximates a continuous system in which the number of power outage facilities in the continuous system is increased or decreased. The normal system is a state of the power system in a normal operation state. For example, when the number of power outage facilities in the normal system is 2, the number of power outage facilities is 1 or 3 is always around the system. The system for power outage work is a (peripheral) work system that is close to the system at all times, and the results have been obtained in the survey. By constraining the periphery of the system, the amount of calculation can be reduced without reducing the optimization accuracy. FIG. 3 shows an example of the state of the power system. In the case where FIG. 3 is a constant system, for example, the state shown in FIG. 4 is always around the system. Note that the number of systems when always restricted to the periphery of the system is obtained by the following equation, for example.

M = 1,2, ..., MM, N = 1,2, ..., MN

  In the above equation, MM is the maximum number that can be energized at the same time from power facilities that are always in a power outage state, MN is the maximum number that is always in a power outage state from power facilities that are always in an energized state, and off is a constant power outage. The number of power equipment in the state, on is the number of power equipment that is always energized, m is the number of power equipment that is always energized, and n is the power outage from the power equipment that is always energized. It is a number to do. The range around the normal system can be arbitrarily set by changing the values of MM and MN in the above equation. The range around the regular system is set to a range in which the amount of calculation can be reduced without reducing the optimization accuracy.

  In the detailed system generation process (S312), a state (hereinafter referred to as “detailed system”) in which the contraction system obtained by the contracted system generation process (S311) is restored to the original state is generated. The generated detailed system is stored in the database.

なお、上式において、ｗは同調作業の数、ＭＷは同調作業の最大数、ＭＢは全作業設備数である。 In the power outage work facility combination processing (S313), a power equipment combination that requires power outage work is generated and stored in the database. If a plurality of power outage operations (hereinafter referred to as “synchronization operations”) are performed at the same time, the supply reliability is lowered. Therefore, the generation of combinations is performed so that the number of combinations that can be synchronized operations is as small as possible. For example, the combination is generated such that the number of tuned operations is the minimum number required to shut down the required power equipment within the planning period. In this case, the number of combinations is obtained from the following equation.

In the above equation, w is the number of synchronized work, MW is the maximum number of synchronized work, and MB is the total number of work facilities.

  In the candidate generation process (S314), a candidate for the work system is generated by superimposing the combination obtained in the power outage work facility combination process (S313) on the detailed system obtained in the detailed system generation process (S312). Store in the database. 4 and 5 show an example of the power system. 4 is a detailed system obtained by the detailed system generation process (S312), and FIG. 5 requires the power outage work obtained by the combination process (S313) of the power outage work facility in the detailed system of FIG. It is a work system candidate generated by overlapping one of the combinations of electric power facilities. In this example, a power facility (hereinafter referred to as “power failure work facility”) to be subjected to a power failure operation is a transmission line b3.

== 2. System operation constraint judgment processing (II) ==
The system operation constraint determination process (II) includes a system power loss calculation process (S315), an NM system creation process (S316) for a work system candidate, and a process for determining whether or not the operation constraint is satisfied for the NM system ( S317).

  In the system power loss calculation process (S315), system power loss is calculated for each work system candidate generated in the above-described work system candidate generation process (S314). Here, the system loss power is the sum of losses generated in the power equipment. In the NM system creation process (S316) for the work system candidate, a work system candidate for the NM standard is created. Note that the initial value of M is “1”. In the determination process (S317) of whether or not the operation constraint is satisfied for the NM system, the system is determined for the work system candidates created in the NM system creation process (S316) for the work system candidates and stored in the database. It is determined whether or not operational constraints (hereinafter referred to as “operational constraints”) are satisfied, and work system candidates that can actually be operated are extracted. In addition, since the operation constraints differ depending on the operation location, the operation constraints are changed to various variations. Therefore, in the power failure work planning system of the present embodiment, the process for determining whether or not the constraint is satisfied is divided for each determined constraint. By dividing the processing in this way, it is possible to respond quickly and flexibly to various variations of operation constraints. In addition, the result of determination as to whether or not the constraint is satisfied is managed in a common table provided in the database. This makes it possible to comprehensively grasp and manage the determination results.

  The common table stores, for example, whether or not there is a violation of operation violation, NM supply hindrance power, NM margin power, transmission loss power, and the like, which will be described later. It should be noted that in determining whether or not the operation constraint is satisfied, any one work system candidate having an operation violation cannot be an operable candidate. Therefore, when a violation is confirmed in the determination of an operation violation, the processing efficiency is improved by excluding it from the determination processing target for other constraints thereafter.

  The operation constraint is determined using, for example, power flow calculation. As a power flow calculation method, it is desirable that the processing is performed at high speed. For example, OSPF (Optimal Switching Power Flow: For example, R. Bacher, H. Glavitsch: “Network Topology Optimization with Security Constraints” IEEE Trans. PS, Vol. PWRS -1, No. 4, 103-111 (1986)).

=== 3. System configuration combination processing (III) ===
In the system configuration combination process (III), the working system candidates extracted by the above-described system operation constraint determination process (II) are ranked by imposing various conditions, and the state of the power system with high supply reliability To extract. System configuration combination processing (III) includes NM supply hindrance power calculation processing (S318), NM overload amount calculation processing (S319), NM margin power amount calculation processing (S320), and repeated for each balance section. Calculation process (S321), work system candidate restoration process (S322), sort process (S323), judgment process whether work system candidates have been completely ordered (S324), system configuration that satisfies power outage work requirements Processing such as selection processing (S325), processing to determine whether the required number of days is within the planning period (S326) to (S327), and power outage work plan creation processing (S328) with high supply reliability within the planning period included.

  In the NM supply hindrance power calculation process (S318), the NM supply hindrance power for each work system candidate extracted by the above-described system operation restriction determination process (II) is calculated. The calculated NM supply hindrance power is stored in the database in correspondence with each work system candidate.

  In the NM overload amount calculation process (S319), the NM overload amount is calculated for each work system candidate extracted by the above-described system operation constraint determination process (II). The calculated NM overload amount is stored in the database in correspondence with each work system candidate.

  In the NM margin power amount calculation process (S320), the NM margin power amount is calculated for each work system candidate extracted by the above-described system operation constraint determination process (II). The calculated NM marginal electric energy is stored in the database in association with each work system candidate.

  In the repeated calculation process (S321) for each balance section, the processes from (S316) to (S320) are repeatedly executed for a plurality of balance sections with different load conditions of the power equipment. Here, the supply reliability of the power system varies depending on the state of the power equipment such as the state of the generator (start / stop) and the load of the power equipment constituting the power system, for example. The balance section is a state of power generation and load at a certain point of time that is actually collected or simulated. The processing results of (S316) to (S320) that are repeatedly executed are stored in the database for each balance section. The values of the NM supply hindrance power and the system loss power vary according to the balance section. Therefore, by obtaining the NM supply hindrance power and the system loss power for each balance section in this way, it is possible to prevent optimization from being performed depending on a specific balance section.

  In the work system candidate restoration process (S322), work that does not have an operable work system candidate is restored as an operational candidate when accident countermeasures are taken, even if the work system candidate cannot be operated. Let FIG. 6 is a flowchart showing the flow of work system candidate restoration processing.

  When M is 1 (S411: YES), the information processing apparatus 200 sequentially selects one power facility constituting the power system (S412). The information processing apparatus 200 searches the database for work system candidates that use the selected power equipment (hereinafter referred to as “selected equipment”) as a power outage work equipment (S413), and is operable among the searched work system candidates (operation If no candidate exists (no constraint violation) (S414: NO), one retrieved work system candidate is extracted in order (S415). The information processing apparatus 200 extracts one N-1 system corresponding to the extracted work system candidate (hereinafter referred to as “extracted system”) from the database (S416), and the extracted N-1 system satisfies the operation constraint. It is determined whether or not (S417). The determination as to whether or not the N-1 system satisfies the operation constraint is the same as the processing in (S317) above. When there is an N-1 operation constraint violation (S418: YES), the information processing apparatus 200 checks whether or not there is an accident countermeasure for the N-1 system (S419). FIG. 7 is a flowchart showing a flow of processing for checking whether or not there is an accident countermeasure for the N-1 system. The information processing apparatus 200 initializes the variable D to 0 (S431), increments D (S432), and determines that there is no accident countermeasure when D exceeds a specified value (S433: NO) ( S434). On the other hand, when D is equal to or less than the specified value (S433: YES), the information processing apparatus 200 has the Hamming distance from the extracted system among the detailed systems stored in the database in the detailed system generation process (S312). The list is extracted from the list (S435). The hamming distance between systems is the number of different characters when the state of each power facility constituting each system is expressed as a character string. For example, in the example of FIG. 8, the states of the facilities b1 to b9 configuring the system are expressed as a 9-character string as “1” in the energized state and “0” in the power failure state. In the example of FIG. 8, the state of the system 11 is expressed as “011001001”, the state of the system 12 is expressed as “010101001”, and “2”, which is the number of characters that differ between these character strings, is the Hamming distance. Become. The information processing apparatus 200 selects one of the detailed systems whose Hamming distance matches D (S436), and extracts the power equipment that is in the power outage state as the work target equipment in the extraction system and the above (S416) In the selected N-1 system, the power facility that is in a power outage state (hereinafter referred to as “accident equipment”) due to the occurrence of an accident or the like is changed to a power outage state in the selected detailed system (S437). It is determined whether the detailed system in which the facility is in a power failure state satisfies the operational constraints (S438). Note that whether or not the operation constraint is satisfied is the same as the processing in (S317) described above. When determining that the operation constraint is violated (S439: YES), the information processing apparatus 200 excludes the detailed system from the list (S440). The information processing apparatus 200 repeats the processing of (S435) to (S438) until all of the detailed systems extracted in (S435) are selected (S441: YES), and if no detailed system remains in the list (S442: NO) and (S432) are repeated. If the detailed system of the list remains (S442: YES), the information processing apparatus 200 calculates the supply reliability for each detailed system in the list (S443), and restores the detailed system with the highest supply reliability to the recovery target. The system is determined (S444), and it is judged that there is an accident countermeasure (S445).

  When it is determined that there is an accident countermeasure (S420: YES), the information processing apparatus 200 determines whether a procedure for switching from the extracted system to the recovery target system can be planned (S421). A general method can be used to determine whether or not the extraction system can be switched to the recovery target system. For example, in the power system state transition (hereinafter referred to as “switching procedure plan”) in which the power facility is interrupted one by one from the extracted system and the power system state is changed (hereinafter referred to as “switching procedure plan”) It is possible to determine whether or not there is a switching procedure plan that satisfies all of the predetermined constraints. If it is determined that switching is possible (S422: YES), the information processing apparatus 200 repeats the processing from (S416) for all N-1 systems (S423). The information processing apparatus 200 has no operation constraint violation for all N-1 systems (S418: NO), or has an accident countermeasure (S420: YES) and has an effective switching procedure plan (S422: YES) ), The database is updated so that the extracted system is a candidate for operation (S424). The information processing apparatus 200 repeats the above processing for all work system candidates searched in (S413) (S425).

  As described above, in the work system candidate revival process (S322), work that does not have a work system candidate can be operated even if the work system candidate that does not satisfy the operation constraints can be recovered from an accident. Can be revived as a candidate. Therefore, it is possible to make a power outage work plan on each day.

  In the sort process (S323), the work system candidates are sorted (aligned) in the ascending order of the NM supply trouble power using the NM supply trouble power as the first sort key. This sorting is performed on work system candidates obtained from all balance sections. When there are work system candidates having the same NM supply hindrance power, the relationship between the work system candidates is ascending order of the NM overload quantity with the NM overload quantity as the second sort key. Work system candidates are sorted so that Further, when there are work system candidates having the same NM overload amount, in the relationship of such work system candidates, the NM margin power amount is set as the third sort key and the NM margin power amount is descending. Work system candidates are sorted so that Further, when there are work system candidates having the same NM margin power amount, the work systems are arranged in the ascending order of the system loss power with the system loss power as the fourth sort key in the relationship of such work system candidates. Candidates are sorted.

  In the above processing, there may be the same work system candidates belonging to different balance sections, but even if the work system candidates are the same, the demand amount is different for each balance section. There will be a difference. That is, even if the work system candidates are the same, the sort order changes depending on the difference in NM supply hindrance power, so that the work system candidates to be preferentially selected can be determined. According to the above method, work system candidates are determined in consideration of a plurality of balance sections, thereby determining a schedule to be worked on, and work with higher supply reliability than when using a single balance section. You can make a plan.

  In the sorting process (S323) shown above, the NM supply trouble power, the NM overload amount, the NM margin power amount, and the system loss power are sorted in this order (sort key of the sort key). The priority can be arbitrarily changed by the user or the like depending on which value is important. This change can be performed by, for example, an interface using GUI (Graphical User Interface) or CLI (Command Line Interface). Further, it is possible to perform processing so that a state where the NM overload amount is equal to or greater than a specified value is not set as a work system candidate.

  In the determination process (S324) of whether or not the work system candidates have been completely ordered, it is determined whether or not the work system candidates have been completely ordered by the sort process in (S323). If the work system candidates are not completely ordered, the value of M is increased by 1 (S316) and the subsequent processing is executed again. In this way, when the work system candidates cannot be completely ordered, it is assumed that M (M = 3, 4, 5,...) Power facilities have stopped functioning (for example, these are , N-3 standard, N-4 standard,...), It is possible to finally order the work system candidates completely by repeatedly performing the processing after (S316).

  In the system configuration selection process that satisfies the power outage work request (S325), the work system candidates with high supply reliability are preferentially selected from the work system candidates sorted as described above until the power outage work request is satisfied. Select. Then, the number of days required when the work system candidate selected in this way is executed is calculated, and if the required number of days exceeds the set plan period (S326: YES), the work system candidates that have already been adopted Instead, a work system candidate that can be tuned with the highest supply reliability is adopted from the unselected work system candidates (S327), and the required number of days is adjusted to be within the planned period.

  Then, in the power outage work plan creation process (S328) with high supply reliability within the planning period, the power facility to be determined and stopped based on the work system candidates obtained as described above and the balance section. The work is decided from and a power outage work plan with high supply reliability within the planning period is created. As described above, when the work system is determined when the line b3 is a power failure facility in the power system shown in FIG. 4, for example, a work system as shown in FIG. 9 is obtained.

  As described above, according to the power failure work planning system of the present invention, it is possible to determine a work system that maximizes the supply reliability of the power system within the scope of operation restrictions and within the planning period. That is, the power failure work planning system of the present invention can determine the work system so as to maximize not only the operator of the power system but also the customer.

== System switching procedure plan creation process ==
When the work system is determined as described above, next, output processing of information (hereinafter referred to as “operation sheet”) indicating a procedure for shifting from the normal system to the work system is performed. Transition of the state of the power system from the regular system to the work system is performed by powering out the power equipment one by one. FIG. 10 is a diagram illustrating an example of state transition of the power system in the power outage work plan. In the example of FIG. 10, when the state of the electric power system is transferred from the constant system 41 to the work system 42, the operator who performs the control operation of the electric power system cuts off the power facility one by one from the constant system 41 one by one. The state of will be changed. The state during the transition from the regular system to the work system is the operating system 43. In the power outage work planning system of the present embodiment, as will be described later, the operating system is determined so that the supply reliability of the power system becomes high. From the power outage planning system, operation slips are created (output) based on the continuous system, the operating system, and the work system. The operator who performs the control operation of the power system performs the control operation of the power system based on the operation slip. FIG. 11 is a diagram illustrating a flow of operation sheet output processing.

  The information processing apparatus 200 stores, in the database, power equipment (hereinafter referred to as “difference equipment”) whose state changes between the regular system and the work system (S511). FIG. 12 shows an example of the state of each power facility in each of the regular system and the work system. In the example of FIG. 12, for each power facility, “1” is shown in the energized state and “0” is shown in the power outage state, and the state changes between the regular system and the work system. The power facilities b3, b4, b5, and b9 are indicated by the circles in the figure.

  The information processing apparatus 200 first stores the continuous system in the database as the current system (S512). Next, the information processing apparatus 200 is the number obtained by subtracting “1” from the number of energized facilities in the current system, the number of energized power facilities (hereinafter referred to as “number of energized facilities”) among the work system candidates. The difference equipment state is different from the difference equipment state in the current system (S513). In the example of FIG. 12, when the current system is the current system, the status of the differential equipment changes and the number of energized equipment is reduced by 1, so that the work system candidate in which the power equipment b3 or b5 is in the power outage state (0) Will be selected.

  The information processing apparatus 200 selects the extracted work system candidates (hereinafter referred to as “operating system candidates”) one by one as the operating system in descending order of supply reliability (S514). Thus, it is determined whether or not a constraint relating to changing the state of the power equipment from the current system to the operating system (hereinafter referred to as “operation constraint”) is satisfied (S515). In the present embodiment, as the operation constraint, it is adopted that the range of the phase difference angle between the current system and the operating system is within 15 °. When the operating system satisfies the operation constraint (S515: YES), the process proceeds to (S519) described later.

  When none of the above operating system candidates satisfies the operation constraint, the information processing apparatus 200 is the number obtained by adding “1” to the number of energized facilities in the current system, among the work system candidates. The difference equipment state is different from the state of the difference equipment in the current system (S516). In the example of FIG. 12, when the normal system is the current system, the work system candidate in which the state of the power equipment b4 or b9 is in the energized state (1) is selected.

  The information processing apparatus 200 selects the extracted operating system candidates one by one as the operating system in descending order of supply reliability (S517), and operates the selected operating system in the same manner as in the above (S515). It is determined whether or not the constraint is satisfied (S518). If the operating system satisfies the operation constraint (S518: YES) or if the operating system satisfies the operation constraint (S515: YES) in the above (S515), the information processing apparatus 200 sets the operating system as the current system in the database. (S519). When the current system and the work system match (S520: YES), the information processing apparatus 200 outputs the continuous system, the history of the operating system registered in the database, and the work system to the output device 206 (S521). ), The process is terminated. If the current system and the regular system are not the same (S521: NO), the history of the operating system is registered in the database (S522), and the process proceeds to (S513).

  On the other hand, when none of the above-described operating system candidates satisfy the operation constraint, error processing such as displaying a message indicating that the procedure satisfying the operation constraint cannot be indicated is performed (S523), and the processing is terminated.

  As described above, each state from the power system to the working system through the operating system is output. As a result, it is possible to indicate which power facility is going through a power failure, and an operation slip is created. Therefore, it is possible to automatically or semi-automatically perform power outage of the power facility based on the created operation slip. That is, processing can be performed as a series of flow from the power failure work plan to the system switching procedure plan.

  In addition, in (S514) of FIG. 11 described above, the operating systems may be selected one by one in descending order from the supply reliability of the operating system candidates that is high and the phase difference angle is small. In this case, since it is determined whether the operation constraints are satisfied in order from the highest possibility of satisfying the operation constraints, if the in-operation system candidate does not satisfy the operation constraints, another operation is performed. It is possible to proceed to (S516) without determining whether the middle system candidate satisfies the operation constraint.

  FIG. 13 is a diagram showing a transition from the regular system to the work system. In the example of FIG. 13, the power facility b3 is always changed from the power system to the power failure state by the first operation (S601), the power facility b5 is changed to the power failure state by the second operation (S602), and the power facility by the third operation. A procedure is shown in which b4 is energized (S603) and the power equipment b9 is energized by the fourth operation (S604). In this way, by defining the procedure for power failure of each power facility based on the transition of the state of the power system from the always-on system to the work system, it is easy and reliable to provide operation slips for shifting from the always-on system to the work system. Can be created. By creating the operation slip, the operator who performs the control operation of the power system can easily and surely grasp the power equipment to be subjected to the power failure at each stage of the operating system. In addition, the operator can easily perform system operation of the power system by performing a power outage of the power equipment so as to match each state of the output operation slip. Accordingly, an operation error can be prevented.

  Moreover, in the power failure work planning system of this embodiment, among the system candidates, the system with the highest supply reliability is selected as the operating system. That is, an operation slip that can perform a system operation for power failure through the power facility is output so that the supply reliability is highest in the state transition of the power system. Therefore, it is possible to change the state of the power system while keeping the supply reliability high, and the quality of the power supply service can be improved.

  Moreover, in the power failure work planning system of the present embodiment, an operation procedure for constantly changing the state of the power system from the system to the work system is output using the work system candidates created when determining the work system. Therefore, the information processing apparatus 200 does not need to generate a state that is a candidate for the currently operating system again when the procedure of the system operation for changing the state of the power system from the normal system to the working system is shown. Therefore, the processing load of the information processing apparatus 200 can be suppressed.

  In addition, when changing the state of the power system from the regular system to the work system, there are an enormous number of options for selecting which power facility to perform the power failure. Since the state of the equipment is changing and the option with the highest supply reliability is selected, it is not necessary to consider all of the huge options, and it is possible to easily select the one with the highest supply reliability. .

  In the process of creating the system switching procedure plan described above, in (S517), the operating system is selected one by one in descending order of supply reliability from the extracted work system candidates. The operating system may be selected one by one in ascending order of phase difference angle.

  Further, after the error process (S523), the process may not be terminated, and the process may proceed to (S514) or (S517) so as to select another work system candidate as the operating system. Further, returning to the work system determination process shown in FIG. 2, another work system may be determined.

  Further, in the present embodiment, in the restoration process of the work system candidates shown in FIG. 6, the detailed system with the highest supply reliability is determined as the recovery target system (S444) by checking whether there is an accident countermeasure (S419, FIG. 7). Later, it was checked whether or not a switching procedure plan from the work system candidate to the recovery target system could be created (S421). However, among the detailed systems that satisfy the operational constraints in the check process for accident countermeasures (S419, Fig. 7) The one with the highest supply reliability may be determined as the recovery target system. In this case, if there is no detailed system that satisfies the operational constraints, it is determined that there is no accident countermeasure.

  In this embodiment, in the switching procedure plan creation availability check process (S421), the switching procedure plan is created by a general method. However, the switching procedure plan is created by using the processing shown in FIG. You may make it do. That is, a computer having a CPU and a memory stores, in the memory, a continuous system composed of a combination of the states of the power equipment in the power system, and associates the power system with information for specifying the power equipment. The reliability information for calculating the supply reliability of the power is stored in the memory, the designation of the power outage target equipment that is the target of the power outage work is received, and the power outage target equipment is in a power outage state in the power system. Generating a work system candidate comprising a combination of the states of the power equipment in the power system, and for each of the work system candidates, the state of the power equipment in the work system candidate and the power in the work system candidate The supply reliability is calculated based on the reliability information corresponding to the facility, and based on the calculated supply reliability. And determining a work system that is one of the work system candidates, and among the work system candidates that are different from the work system, the energization equipment that is the number of the power facilities in the energized state in the work system candidate A difference between the number and the number of energized equipment in the regular system is within a predetermined range, and one of the selected work system candidates is operated based on the calculated supply reliability It is possible to determine the middle system and create a switching procedure plan. In this case, a system switching procedure planning system realized by a computer includes a CPU, a memory, a continuous system storage unit that stores a continuous system composed of a combination of the states of the power equipment in the power system, and the power equipment. In association with the information to be specified, a reliability information storage unit that stores reliability information for calculating the supply reliability of the power system, and designation of a power outage target facility that is a power facility subject to a power outage operation are received. The power failure target facility input unit, the power failure target facility in the power system is in a power failure state, a work system candidate generation unit that generates a work system candidate consisting of a combination of the states of the power facility in the power system, For each of the work system candidates, the state of the power equipment in the work system candidates and the power in the work system candidates A supply reliability calculation unit that calculates the supply reliability based on the reliability information corresponding to the preparation, and a work system that is one of the work system candidates is determined based on the calculated supply reliability. Among the work system candidates that are different from the work system, the number of energized equipment that is the number of the power facilities that are energized in the work system candidate, and the energized equipment in the regular system An in-operation system candidate selection unit that selects a difference between the number and the number within a predetermined range; and, based on the calculated supply reliability, one of the selected work system candidates as an in-operation system And an in-operation system determination unit to determine.

  The computer may output the continuous system, the operating system, and the work system to an output device. In this case, the system switching procedure planning system includes an operation form output unit that outputs the continuous system, the operating system, and the work system to an output device.

  In addition, the computer may store a plurality of the operating systems from the constant system to the working system in the memory.

  The computer may receive one designation of the plurality of operating systems and output the designated operating system to an output device.

  In addition, the computer stores, in the memory, differential equipment that is the power equipment whose state is changing between the regular system and the work system, and the work different from the work system. Among the system candidates, the difference between the number of energized facilities in the work system candidate and the number of energized facilities in the regular system is within a predetermined range, the state of the differential facility in the work system candidate, and the operating system You may make it select the thing in which the state of the said difference equipment in has changed.

  Further, the computer selects the number of energized equipment in the work system candidate among the work system candidates different from the work system, which is a number obtained by subtracting 1 from the number of energized equipment in the always-on system. When a work system candidate is selected and there is no selected work system candidate, among the work system candidates different from the work system, the number of energized equipment in the work system candidate is equal to the number of energized equipment in the regular system. You may make it select the thing which becomes the number added 1.

  In addition, the computer stores operation constraint information indicating a constraint in operating the power system in the memory, and determines the work system based on the supply reliability and the operation constraint information. May be. In this case, the system switching procedure planning system includes an operation constraint information storage unit that stores operation constraint information indicating constraints on performing a power failure of the power facility in the power system, and the in-operation system determination unit includes: The operating system is determined based on the supply reliability and the operation constraint information.

  Further, the computer stores operation restriction information indicating restrictions on performing power failure of the power facility in the power system in the memory, and the operation is performed based on the supply reliability and the operation restriction information. The middle system may be determined.

  The computer may determine the work system candidate having the highest supply reliability as the operating system.

  Further, the computer selects one of the work system candidates whose phase difference angle between the normal system and the work system candidate is within a predetermined range among the work system candidates based on the supply reliability. You may make it determine as a middle system.

  Further, the computer accepts input of phase difference angle range information specifying the predetermined range of the phase difference angle between the regular system and the rear of the work system, and stores the received phase difference range information in the memory. May be.

  Further, the computer selects one of the work system candidates whose phase difference angle between the normal system and the work system candidate is within a predetermined range among the work system candidates, the supply reliability and the phase difference angle. May be determined as the operating system.

  In addition, the power equipment constituting the power system may include at least one of a generator, a transmission line, and a transformer.

  Although the present embodiment has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

200 Information processing apparatus 201 CPU
202 Memory 202c Program 205 Input Device 206 Output Device 207 Recording Medium 208 Storage Device S311 Reduced System Generation Processing
S312 Detailed system generation processing
S313 Combination processing of power failure work equipment
S314 candidate generation processing
S315 Power loss calculation processing
S316 NM system creation process S317 Judgment process whether operation constraint is satisfied
S318 N-2 supply hindrance power calculation processing
S319 N-2 overload calculation processing
S320 N-2 margin energy calculation process
S321 Iterative calculation process for each balance section
S322 Work system candidate restoration process S323 Sort process S325 System configuration selection process that satisfies power outage work request
S328 Create power outage work plan with high supply reliability within the planning period

Claims (5)

A power outage work planning system used for a power outage work plan of a power system composed of a plurality of power facilities,
A designation means for accepting designation of a power outage target facility which is a power facility subject to the power outage work,
Work system candidate generating means for generating a work system candidate consisting of a combination of states of the power facilities in the power system, wherein the power outage target facility is in a power outage state in the power system,
For each work system candidate, an N-1 system generating means for generating an N-1 system that is an electric power system in which at least one of the electric power facilities other than the power outage target equipment is in a power outage state;
For each of the work system candidates, an operation availability determination unit that determines whether the work system candidates can be operated according to whether all of the corresponding N-1 systems satisfy a predetermined operation constraint;
When there is no operable work system candidate, the N-1 system corresponding to each work system candidate is different from the N-1 system that does not satisfy the operation restriction for the N-1 system that does not satisfy the operation restriction. Among other power systems, restoration target system candidates in which the number of states of each power equipment in the N-1 system and the state of each power equipment in the other power system are less than or equal to a predetermined value. And when there is a recovery target system candidate that satisfies the operation constraint, the recovery system system determines that the work system candidate is operable,
Work plan determination means for determining a work system to be adopted as a power outage work plan from the operational work systems,
A blackout work planning system characterized by comprising: The power outage planning system according to claim 1,
Storage means for storing reliability information for calculating supply reliability of the power system in association with information for specifying the power equipment;
For each of the work system candidates and the N-1 system, supply reliability determination means for determining supply reliability based on information on each power facility stored in the storage means;
With
The operation availability determination means determines the operation availability of the work system candidate according to the supply reliability of the work system candidate,
The resurrection means determines whether or not the N-1 system satisfies operational restrictions according to the supply reliability of the N-1 system;
Power failure work planning system characterized by The power outage planning system according to claim 1,
Corresponding to the information specifying the electric power equipment, comprising storage means for storing reliability information for calculating the supply reliability of the electric power system,
The resurrection means calculates the supply reliability for a recovery target system candidate that satisfies the operation constraint, determines the recovery target system candidate with the highest supply reliability as a recovery target system,
The storage means stores the recovery target system in association with the N-1 system;
Power failure work planning system characterized by A power outage work planning method used for a power outage work plan of a power system composed of a plurality of power facilities,
Computer
Accepting designation of power outage target equipment that is the target of power outage work,
In the power system, the power outage target facility is in a power outage state, generating a work system candidate consisting of a combination of the states of the power equipment in the power system,
For each work system candidate, generate an N-1 system that is a power system in which at least one of the power facilities other than the power outage target facility is in a power outage state,
For each work system candidate, depending on whether all of the corresponding N-1 systems satisfy a predetermined operation constraint, determine whether the work system candidate can be operated,
When there is no operable work system candidate, the N-1 system corresponding to each work system candidate is different from the N-1 system that does not satisfy the operation restriction for the N-1 system that does not satisfy the operation restriction. Among other power systems, restoration target system candidates in which the number of states of each power equipment in the N-1 system and the state of each power equipment in the other power system are less than or equal to a predetermined value. Extract, and when there is a recovery target system candidate that satisfies the operation constraints, determine that the work system candidate is operable,
Determining a work system to be adopted as a power outage work plan from the operable work systems;
Power outage planning method characterized by A program used in a power outage work plan for a power system composed of a plurality of power facilities,
On the computer,
A step of receiving designation of a power outage target facility that is a power facility subject to the power outage work;
Generating a work system candidate consisting of a combination of each state of the power equipment in the power system, wherein the power outage target equipment is in a power outage state in the power system;
For each work system candidate, generating an N-1 system that is a power system in which at least one of the power facilities other than the power outage target facility is in a power outage state;
For each of the work system candidates, determining whether or not the work system candidates can be operated according to whether or not all of the corresponding N-1 systems satisfy a predetermined operation constraint;
When there is no operable work system candidate, the N-1 system corresponding to each work system candidate is different from the N-1 system that does not satisfy the operation restriction for the N-1 system that does not satisfy the operation restriction. Among other power systems, restoration target system candidates in which the number of states of each power equipment in the N-1 system and the state of each power equipment in the other power system are less than or equal to a predetermined value. Extracting, and when there is a recovery target system candidate that satisfies the operation constraint, determining that the work system candidate is operable;
Determining a work system to be adopted as a power outage work plan from the operable work systems;
A program for running

Images