JP5111025B2 - System planning support system - Google Patents

Description

  System planning support system that can be used for equipment maintenance work, equipment renewal planning, etc., as well as selection of equipment constituting the power system and determination of system protection methods by sharing a centralized program and a single database About.

  Traditionally, the decision of “system protection method” for new and expansion of power systems and “relay operation study” by reviewing the power transmission system has been made and determined manually based on the division of work defined by the company. .

  However, in the judgment / decision made artificially, there is a risk of erroneous input or leakage of communication, and there is a problem that the supply reliability of the power system is lowered.

For this reason, a technique relating to a simulation method of the system protection relay itself, a technique relating to an accident sequence management device of a system accident training simulator system, and the like have been proposed (see, for example, Patent Document 1 and Patent Document 2).
Japanese Patent Laid-Open No. 5-199647 JP 2000-354328 A

  Conventionally, the creation of a power system plan such as system protection has a problem that it takes a lot of time for examination because work is divided into different departments in charge for each examination content, and it is performed artificially.

  In addition, there is a problem in that data sharing is not attempted because individual dedicated programs are used for each examination content.

  In addition, after the construction of the power system, even if the line constant is reviewed due to a change in the transmission system, if there is a lack of information provision or incorrect data provision from the department in charge of construction to the department in charge of relay operation However, there is a problem that the reliability of supply of the system decreases because the relay operation applied to the system review cannot be performed.

  The present invention has been made in view of such circumstances, and aims to unify the program in the department in charge of each examination step, share data, and further provide a simulation function of system protection operation, thereby providing power An object of the present invention is to provide a system planning support system capable of improving the supply reliability of the system.

  The present invention is a system planning support system for supporting power system planning work, and a plurality of programs prepared in advance according to each business process on a terminal of a department in charge of work necessary for system planning. Program execution means enabling operation of the program, system equipment selection means for selecting equipment constituting the power system based on the program operation in the terminal, and data of the equipment selected by the system equipment selection means And a system protection method based on facility data storage means for storing the respective business processes in association with each other in the database, equipment data stored by the equipment data storage means, and reference data used as a standard for system protection provided in advance. And a protection method selecting means for selecting

  Here, “selection of equipment constituting the power system” means that the specification of equipment, calculation of set values, and the like are included in addition to selection of the type of equipment.

  According to the present invention, a plurality of departments in charge of different business processes can examine system facilities and create a protection plan using a single program and a single database. Can be planned.

  Further, the system planning support system of the present invention simulates the operation of power system protection based on the system protection system selected by the protection system selection means and the reference data used as a standard for system protection provided in advance, and system protection In conformity determination means for determining conformity or nonconformity of the method, in response to the determination of nonconformity by the conformity determination means, to extract the non-conforming business process, to the terminal provided in the department in charge of the business process, And a determination result display means for displaying a determination result as nonconforming.

  Here, the “protection method” means various system protection methods for protecting the power system using a protective relay or the like. “Preliminary reference data for system protection” refers to, for example, manuals for system protection, laws that define system protection methods and relay operations, and internal rules, in the form of data, etc. It is a meaning to keep.

  According to the present invention, since the determination result indicating incompatibility is directly displayed on the terminal of the department in charge of the business process, there is an effect that the department in charge can quickly respond.

  Further, the program execution means provided in the system planning support system of the present invention is a terminal provided in a department in charge of a continuous business process upon completion of examination of system facilities at a terminal provided in a department in charge of a preceding business process. And displaying data indicating the end of the examination of the system facility of the preceding business process.

  Here, “display data indicating completion of examination” means that the data corresponding to the terminal provided in the department in charge of the continuous business process is displayed, and the user is guided to a screen displaying the corresponding data by e-mail or the like. The meaning is also included.

  According to the present invention, upon completion of one of the business processes, a notification is made to the department in charge of the next business process, so that leakage of communication due to human error is prevented and reliable work is performed. There is an effect that can be.

  Further, the reference data in the protection scheme selection means and the suitability determination means provided in the system planning support system of the present invention is data including laws and internal rules.

  According to the present invention, since the creation of the protection plan and the operation check are performed based on the laws and in-house rules stored in the system, there is an effect that the human error can be surely performed.

  Further, the protection method selection means provided in the system planning support system of the present invention determines whether or not there are restrictions on the relay operation and review of the settling value of the relay when it is executed for the purpose of review after the construction of the power system. It is characterized by that.

  Here, “revision of power system protection” means, for example, that if some settings are changed after construction of the power system, the power system protection method is reconfirmed, and a new one is added if necessary. It means creating a protection plan.

  According to the present invention, the relay operation corresponding to the system review after the construction of the power system can be performed, so that there is an effect of increasing the supply reliability of the system.

  The system protection method selected by the protection method selection means included in the system planning support system of the present invention is stored in the database and is responsible for facility maintenance work and update planning work after the construction of the power system. Each department terminal is provided with system information display means for displaying the database via a network.

  According to the present invention, the data of the system protection plan can be shared even after the construction of the power system, so that the data can be effectively used for the maintenance work of the facilities and the update plan work.

  In addition, the program execution unit and the protection method selection unit again receive the determination result of the nonconformity provided by the suitability determination unit included in the system planning support system of the present invention at the terminal of the department in charge of the non-conforming business process. The process is repeated until the compatibility is determined by the compatibility determination means.

  According to the present invention, since the selection of the system equipment and the system protection method is repeatedly performed until the reference data is matched, the system equipment and the system protection system that are surely matched with the reference data are produced.

  According to the system planning support system of the present invention, it is possible to shorten the examination time by integrating the examination steps of the department in charge assigned to each examination content with a unified program.

  In addition, the examination results at each examination step are stored in a single database with a centralized program, and all departments in charge share the database, so the examination will be based on the same data, Consideration accuracy is greatly improved.

  Further, when the examination in each examination step is completed, the department in charge of the examination is automatically notified by e-mail or the like, so that communication failure can be prevented and reliable business execution can be achieved.

  In addition, since data necessary for system protection is stored in a single database, system protection operation simulation can be performed, and the examination accuracy is further improved.

  In addition, since examination history, examination data, examination results, and the like are accumulated in a single database, it can be used for equipment maintenance work and equipment update plans.

  Hereinafter, a first embodiment of the system planning support system of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of the system planning support system 1 of the present embodiment.
The system planning support system 1 of this embodiment includes a terminal 3 of the headquarters distribution business headquarters, a terminal 4 of the construction organization power transmission section, a terminal 5 of the construction organization substation section, and a terminal 6 of the power plant engineering section via the communication network 2. The terminal 7 of the power station power transmission section, the terminal 8 of the power station substation section, the terminal 9 of the power station control station, etc. are connected.

  The system planning support system 1 includes a transmission / reception unit 11 connected to the communication network 2, a central processing unit 12 that performs arithmetic processing related to power system planning, a storage unit 13 that holds data necessary for power system planning, and data An input unit 14 such as a keyboard for inputting data and a display device 15 for outputting data or an output unit 15 such as a printer are constituted.

  The transmission / reception unit 11 of the system planning support system 1 of this embodiment is connected to the terminal 3 of the head office distribution business headquarters via the communication network 2.

  The central processing unit 12 is a transmission / reception processing unit 121 that exchanges data with the transmission / reception unit 11, an input / output processing unit 122 that exchanges data with the input unit 14 or the output unit 15, and the facilities that make up the power system System facility selection means 123 that supports the selection of types, specifications, set values, etc., facility data storage means 124 that stores the types, specifications, set values, etc. of the selected facilities in a database, the types and specifications of the selected facilities -Based on data such as set values and standards stipulated by law or internal rules, protection method selection means 125 for selecting a system protection method, and an accident in the selected system protection method is simulated to determine suitability If the conformity determination means 126 determines that the conformity determination result is “nonconformity”, the business process causing the nonconformity is extracted and the business process is in charge. Determination result displaying means 127 notifies the police station, after construction of the power system, and a system information display means 128 for performing a database shared via the network 2.

  The central processing unit 12 includes a program execution unit 129 that unifies and manages a dedicated application program necessary for power system planning. The program execution means 129 loads an appropriate dedicated program from the program (FIG. 5) such as a power flow calculation program held in the dedicated program DB 133 to the central processing unit 12 according to each examination step of the power system plan, and examines it. The dedicated program can be operated on the terminal of the person in charge of the department in charge of the step.

  The storage unit 13 is a power system DB 131 that holds data of facilities constituting the power system, a law / internal standard DB 132 that holds data such as laws and in-house rules concerning power system protection, and a dedicated program necessary for studying the power system plan Are configured by a dedicated program DB 133 or the like. Note that these databases can be shared by all departments in charge, such as the terminal 3 of the head office distribution business headquarters connected via the communication network 2.

The power system DB 131 includes an equipment table, an examination step table, and the like.
In the equipment table, data such as the type, specification, performance, and set value of the equipment constituting each power system is held using a unique “transmission system name” for each power system as a main key (FIG. 2).

  In the study step table, for each power transmission system, the data of the department in charge or the person in charge responsible for studying the types, specifications, performance, and setting values of the equipment constituting each power system, and the person in charge at each study step The data of the dedicated program that supports the examination of this is held (Fig. 3). In this embodiment, input of data such as a department in charge and a person in charge is input in advance for each new transmission line project.

The legal / internal standard DB 132 includes a legal table, an internal standard table, and the like.
The law table and in-house rules table hold data such as laws and in-house rules necessary for determining the protection method of the power system and simulating the system protection operation (FIG. 4).

  The dedicated program DB 133 centralizes and manages dedicated application programs necessary for power system planning.

  Specifically, tidal current calculation program, technical calculation (maximum short-circuit capacity) program, transmission tower design program, circuit breaker / current transformer / transformer selection program, technical calculation (line constant) program, technical calculation (short-circuit capacity) program , Equipped with a technical calculation (zero-phase circulating current value) program, a system safety analysis program, etc. (Fig. 5), and according to the request from the program execution means 129, suitable dedicated according to each examination step and examination item of the power system plan Provide a program.

FIG. 6 is a schematic diagram showing a flow of the system planning support system 1 of the present embodiment.
In “Study Step 1” to “Study Step 5”, the type, specification, set value, etc. of the equipment constituting the power system when a new power system is added or expanded are examined. The construction of an electric power system requires many business processes, and the related departments are diverse. In the description of each examination step in FIG. 6, the name of the department in charge in the present embodiment is shown on the left.

  Selection of the types, specifications, setting values, etc. of the equipment constituting the power system is performed by the person in charge of the department in charge of each business process with the support of a dedicated application program necessary for planning the power system.

  First, the program execution means 129 loads a dedicated program necessary for the first study step / study item from the dedicated program DB 133 to the central processing unit 12, and the person in charge of the department in charge of the first study step / study item An operation screen is displayed on the terminal via the communication network 2.

  The person in charge in the department in charge examines the examination item in charge on the operation screen displayed on the terminal, and inputs the result of the examination into the operation screen of the dedicated program.

  The system equipment selection unit 123 acquires data from the person in charge of the department in charge input on the operation screen via the communication network 2 and performs arithmetic processing related to setting of the equipment type, specification, setting value, and the like. The result of the arithmetic processing is stored in the equipment table of the system plan DB 131 by the equipment data storage means 124.

  The program execution means 129 ends the examination of the previous examination step at the terminal of the person in charge of the department in charge of the next examination step upon completion of the examination of the equipment type, specification, setting value, etc. in the first examination step. Automatic notification to the effect.

  Specifically, from the data held in the examination step table of the power system DB 131, the data of the department in charge, the person in charge and the mail address in charge of each examination item of the next examination step are referred to via the communication network 2. Then, an e-mail notifying the end of the examination of the previous examination step is transmitted (program execution means 129).

  It should be noted that the e-mail can be attached with a network address or the like of a dedicated program that supports the examination in the next examination step. Thereby, when the person in charge of the next examination step selects a link or the like, the corresponding dedicated program can be executed and the examination can be started quickly. In addition, instead of automatic notification by e-mail, it is also possible to execute a dedicated program for supporting the examination on the terminal of the person in charge of the next examination step so that the operation screen is displayed directly.

  The person in charge in the department in charge of the next examination step that receives the e-mail examines the type, specification, setting value, etc. of the equipment in charge with the support of the corresponding dedicated program.

  The examination of the type, specification, setting value, etc. of the equipment in the next examination step is performed based on the data of the equipment that has been examined in the previous examination step. That is, the examination result in the previous examination step is saved in the equipment table of the system plan DB 131 by the equipment data saving means 124, but a dedicated program that supports the examination of the person in charge in the next examination step is saved in the equipment table. The operation screen is displayed reflecting the recorded data.

  In addition, in the same examination step, even when the examination result is handed over to a person in charge of a different examination item, the automatic notification method can be used.

  When the examination of the types, specifications, set values, etc. of the facilities constituting the power system is completed, the system protection method is selected by the protection method selection means 125 and the system protection operation simulation is performed by the suitability determination means 126.

  If the transmission system is reviewed after the construction of the power system, change data such as the types, specifications, and setting values of the equipment constituting the power system is saved in the equipment table of the system plan DB 131 (not shown). After that, the relay operation is examined, and the system protection operation simulation is performed.

[Selection of system equipment]
Hereinafter, when the power system is newly added or added in the present embodiment, specific examination contents and the like at each examination step will be described (FIG. 6). In addition, although arithmetic processing regarding individual examination items is not specifically described here, each dedicated program is based on data input to the terminal of the person in charge and data held in the facility table of the system plan DB 131. To perform arithmetic processing (system equipment selection means 123).

  In “Study Step 1”, the power transmission system name, system voltage, planned power flow, maximum short-circuit current, and the like necessary for selecting the facilities constituting the power system are examined. The operation in “Study Step 1” is performed at the terminal 3 of the head office distribution business headquarters or the terminal 6 of the power plant engineering section connected via the communication network 2.

  First, the program execution means 129 displays an operation screen for registering basic data such as the name of the power transmission system, the power transmission length, the power transmission route, the system voltage, and the name of the electric station on the terminal of the person in charge. Get the data.

  Next, the program execution means 129 executes a “tidal flow calculation program”, which is a dedicated program, to support the calculation of the maximum operational flow and the minimum operational flow. These data are used as basic data for determining parameters such as transmission line type, power line type, circuit breaker rated current value, current transformation ratio, and transformation ratio in “Study Step 3”.

  Further, the program execution means 129 executes a “technical calculation (maximum short circuit current) program” which is a dedicated program, and supports the calculation of the maximum short circuit current value based on the data on the circuit breaker, the switch, and the like. These data are used as basic data for determining the rated breaking current in “Study Step 3”.

  The equipment data storage unit 124 stores the basic data and the calculated data registered in “Examination Step 1” in the equipment table provided in the power system DB 131. The program execution means 129 automatically notifies the terminal of the person in charge of the department in charge of “review step 2”, which is the next review step.

  In “Study Step 2”, the transmission length, the transmission tower structure, the power line type, the ground line type, the phase arrangement, and the like are studied. The operation in “Study Step 2” is performed at the terminal 4 of the construction organization power transmission section or the terminal 7 of the power station power transmission section connected via the communication network 2.

  The program execution means 129 executes a “transmission tower design program” which is a dedicated program, and based on data such as a transmission transmission length, a transmission route, and a system voltage registered or calculated in “examination step 1”, the transmission tower structure Support the study of In addition, based on the maximum operational flow calculated in “Examination step 1”, the examination of the power line type and the ground line type is supported.

  Furthermore, the examination of the tower phase arrangement is supported based on the transmission tower structure, power line line type, and ground line type determined in “Study Step 2”.

  The data of the power transmission tower structure, power line type, and ground line type are used as basic data for calculating the line constant in “Study Step 4”.

  When the process of “Examination Step 2” is completed, the equipment data storage means 124 saves the calculated data in the equipment table of the power system DB 131, and the program execution means 129 includes the person in charge of the department in charge of “Examination Step 3”. Automatic notification to the terminal.

  In “Study Step 3”, the specifications of the circuit breaker, current transformer, transformer, etc. are examined. The operation in “Study Step 3” is performed at the terminal 5 of the construction agency substation section or the terminal 8 of the power station substation section connected via the communication network 2.

  The program execution means 129 executes a “breaker / current transformer / transformer selection program” which is a dedicated program, and selects and selects the transformer based on data such as the system voltage registered in “Study Step 1”. Support the study of metamorphic ratio. In addition, based on the maximum operating current calculated in “Study Step 1”, support for selection of current transformers, determination of current transformation ratio, selection of circuit breakers, and determination of circuit breaker rated current, circuit breaker rated breaking current, etc. Made.

  When the process of “Examination step 3” is completed, the equipment data storage unit 124 stores the calculated data in the equipment table of the power system DB 131, and the program execution unit 129 stores the person in charge of the department in charge of the “examination step 4”. Automatic notification to the terminal.

  In “Study Step 4”, line constant, short-circuit capacity, ground charging current, zero-phase circulating current, and the like are calculated. The operation in the examination step 4 is performed at the terminal 3 of the head office distribution business headquarters connected via the communication network 2.

  The program execution means 129 executes a “technical calculation program (track constant)” that is a dedicated program, and is based on data such as the transmission tower structure, power line type, ground line type, etc. examined in “Study Step 2”. , Support the calculation of line constants (positive phase, zero phase impedance, ground charging current, admittance, etc.). In addition, a “technical calculation program (short-circuit capacity)” is executed to support the calculation of the short-circuit capacity based on the calculation result of the line constant. Furthermore, the “technical calculation program (zero-phase circulating current value)” is executed, the system voltage determined in “Study Step 1”, the transmission length determined in “Study Step 2”, the transmission tower structure, and the wire phase arrangement Based on the above, the calculation of the zero-phase circulating current value is supported.

  When the process of “Examination Step 4” is completed, the equipment data storage unit 124 stores the calculated data in the equipment table of the power system DB 131, and the program execution unit 129 is assigned to the person in charge of the department in charge of the “Examination Step 5”. Automatic notification to the terminal.

  In “Study Step 5”, the system stability is examined. The operation in the examination step 5 is performed at the terminal 3 of the head office distribution business headquarters connected via the communication network 2 or the terminal 9 of the power station control station.

  The program execution means 129 executes the “system stability analysis program” which is a dedicated program, and based on the examination results from “examination step 1” to “examination step 4”, the optimum fault removal time, that is, the system Supports calculation of interruption time, etc. without shaking or system out-of-step.

  When the process of “Examination Step 5” is completed, the equipment data storage means 124 saves the calculated data in the equipment table of the power system DB 131, and the program execution means 129 is responsible for “system protection method determination / relay operation examination”. Automatic notification is made to the terminal 3 of the headquarters distribution business headquarters or the terminal 6 of the power plant engineering section.

  As described above, in the selection of the system facility in the present embodiment, the result of the examination in each examination step can be reflected in the next examination step. FIG. 7 is an example showing the association of detailed processing flows of each examination step.

[System protection method decision]
The protection method selection means 125 is executed upon receiving an automatic notification from the program execution means 129 (FIG. 6). In the protection method selection means 125, data such as the type / specification / set value of the power system equipment registered / calculated in “Examination Step 1” to “Examination Step 5”, and the laws and regulations such as the electric equipment technical standards, etc. It has a decision support function for selecting a system protection method based on data such as internal standards such as standards, design guidelines, and relay setting standards.

  Specifically, the data stored in the equipment table of the system plan DB 131 by the equipment data storage means 124 is applied to the law table of the law / internal standard DB 132 provided in advance and the data held in the internal standard table, and Make a decision.

  Here, “determination of system protection method” means the optimal method from “PCM current differential protection relay method”, “line selection protection relay method”, “direction distance protection relay method”, “transfer cut-off method”, etc. Is to decide.

  The law table and the in-house rules table shown in FIG. 8 hold each rule as data that has been digitized, and perform comparison and determination with predetermined numeric values held in the equipment table to determine the optimum system protection method. In addition, in the system protection operation simulation (FIG. 11) and the system protection operation examination process (FIG. 13) at the time of reviewing the power transmission system, the data of the law table and the in-house rules table are used.

  The law table stipulates “Electrical Equipment Technical Standards” that specify accident removal times in the event of a short circuit or ground fault, and “Protective Relay Device Power Standards (B) that specifies system protection methods and specifications and test standards for each system. −401, 402) ”and the like are converted into data.

  In the company rules table, “system protection relay installation standard” that defines the system protection method based on the power system configuration and voltage class, individual specifications and related equipment for each system protection method (current transformer, transformer, circuit breaker, “System Protection Relay Device Design Summary Standard Specification” that prescribes the specifications of transmission lines, etc., and “Protective Relay Settling Standards / Settling Manual” that prescribes the power system configuration, settling criteria for each system protection method, settling calculation methods, etc. In addition, “neutral point device facility details” that prescribe the selection conditions for neutral point devices (NGR, NGL, PC) necessary for ground fault protection method selection are stored in data.

  FIG. 9 shows the relationship between the equipment table in the system plan DB 131 and the law table and in-house rule table in the law / in-house rule DB 132.

  The legal table and in-house rules table hold data such as the appropriate setting values determined by each law and in-house rules, and are divided according to the conditions for each item, and further correspond to accident removal time, system constraints, etc. Specific protection methods and protection relay devices are defined.

  In addition, about system | strain restrictions, it can also set so that it may determine, after confirming by the person in charge as needed. Further, the part that needs to be confirmed is collated with the data of the examination item in the examination step table (FIG. 3) provided in the system planning DB 131, the department in charge of the corresponding item and the person in charge are specified, and the examination step table is held. You can also set up to get data for email addresses.

  The protection method selection means 125 follows the predetermined procedure for determining the system protection method when a system protection device is newly installed or added (FIG. 10), and acquires necessary items such as conditions, accident removal time, system constraints, etc. from the equipment table. The optimum system protection method is determined by extracting and applying it to the data held in the relevant legal table and in-house rules table.

  In addition, there exists an effect that management becomes easy by classifying the data used as the reference | standard of a system protection system into conditions, accident removal time, system | strain restrictions, etc. and hold | maintaining with a numerical value etc. At the same time, by providing standards for selecting system protection methods in the law table and in-house rules table, even if there is a change in the laws or in-house rules, we can respond quickly and easily by changing the values in the database. It becomes possible.

FIG. 10 illustrates a flow of a system protection method determination process when a system protection device is newly installed or added.
First, it is determined whether or not the system voltage of the power system related to the new / addition is 220 kV or more (S101). Here, the numerical value of the system voltage registered in “Examination Step 1” is determined in light of the data on the system protection relay device installation standard / design outline in the in-house rules table. As a result of the determination, if it is 220 kV or more, the processing ends as “current differential protection method” (S104).

  If it is not 220 kV or higher, based on the data on the system protection relay device installation standards and design guidelines in the in-house rules table, determine whether the number of balanced power receiving terminals registered in “Study Step 1” is three or more. Perform (S102). If the result of determination is that there are three or more terminals, the processing ends as “current differential protection method” (S104).

  If the number of terminals is not 3 or more, based on the data on the system protection relay installation standard / design outline in the in-house rules table, the presence / absence of the zero-phase circulating current registered in “Examination Step 4” is determined ( S103). As a result of the determination, if the zero-phase circulating current is generated, the process is terminated as the “current differential protection method” (S104).

  If no zero-phase circulating current is generated, it is determined whether or not there is an influence of the system stability registered in “Study Step 5” based on the electrical equipment technical standard data in the law table (S105). As a result of the determination, if there is an influence of the system stability, the processing is terminated as “current differential protection method” (S104).

  If there is no impact on system stability, based on the data in the in-house rules table for system protection relay equipment installation standards and design guidelines, whether it is a small rear capacity or a non-ground fault power source location registered in “Examination Step 4” Whether or not is determined (S106). As a result of the determination, if it is a small rear capacity or a non-ground fault power supply location, the process ends as the “transfer blocking protection method” (S107).

  If it is not a small rear capacity or a non-ground fault power supply location, the protection system registered in “Examination Step 1” is one line transmission line based on the data of the system protection relay installation standard / design outline in the internal rules table. It is determined whether or not (S108). If the result of determination is that the protection system is a single-line transmission line, the processing ends as “direction distance protection method” (S109).

  On the other hand, if the protection system is not a one-line power transmission line, the process ends as “rotation selection protection method” (S107).

  Through the above processing, one of the system protection methods is determined based on the data on the type, specifications, set values, etc. of the power system equipment and the data of the law and internal rules. The determined system protection method is stored in the equipment table of the system plan DB 131 by the equipment data storage means 124.

[System protection operation simulation]
In response to the determination of the system protection system by the protection system selection unit 125, the compatibility determination unit 126 executes and performs a system protection operation simulation (FIG. 6).

  Specifically, based on the data of “examination step 1” to “examination step 5”, an accident is simulated based on the determined system protection method, and “conformity” or “nonconformity” is determined. If the result of determination is “nonconformity”, the review steps that need to be reconsidered are displayed, and the reconsideration request data is automatically notified to the department in charge (determination result display means 127).

Description will be made based on the processing flow of the system protection operation simulation shown in FIG.
The processing by the suitability determination unit 126 is performed by applying the data stored in the equipment table to the data stored in the law table and the in-house rules table prepared in advance, as in the system protection method determination process (FIG. 9).

  First, it is determined whether or not the settling calculation result by the determined system protection method is capable of setting the relay based on the protection relay setting standard / manual data defined by the manual in the in-house rules table (S201). When the setting of the relay is not possible, it is determined as “non-conforming” (S206), and the process ends.

  When the setting of the relay is possible, it is determined whether or not protection in the event of a short circuit is possible (S202). Specifically, it is determined whether or not the settling calculation result and the verification result by the failure calculation program conform to the protection relay setting standard / manual of the in-house rule table. If protection in the event of a short circuit is not possible, it is determined as “nonconforming” (S206), and the process ends.

  If protection in the event of a short circuit is possible, it is determined whether protection in the event of a short circuit is possible (S203). Specifically, it is determined whether or not the settling calculation result and the verification result by the failure calculation program conform to the protection relay setting standard / manual of the in-house rule table. If protection in the event of a ground fault is not possible, it is determined as “non-conforming” (S206), and the process ends.

  If protection against a ground fault is possible, it is determined whether or not the shut-off time satisfies the law and internal regulations (S204). Specifically, it is determined whether or not the verification result by the failure calculation program conforms to the protection relay device power standard and the electrical equipment technical standard in the law table. If the shut-off time does not satisfy the law / internal standard, it is determined as “nonconformity” (S206), and the process is terminated.

  If the shut-off time satisfies the law / in-house standard, it is determined as “conforming” (S205), and the process is terminated.

  If the result of any of the determinations is “nonconforming”, the determination result data is notified to a terminal connected via the communication network 2 to the department in charge and the person in charge who has determined the nonconforming equipment or specifications. (Determination result display means 127).

  First, it is determined whether the transmission voltage is 500 kV / 220 kV system or 110 kV system or less by referring to the data of the equipment table provided in the system plan DB 131 (FIG. 2). Furthermore, it is determined whether the location that has become “non-conforming” is the location where the protection method is considered, the location where the transmission system is examined, such as the wire type, tower configuration, route selection, etc. 12).

  Specifically, when the transmission voltage is 500 kV / 220 kV system and the location where “non-conformity” is a protection method examination location, the distribution business headquarters system engineering staff and the transmission system examination location Is in charge of system planning in the distribution business headquarters, in charge of the equipment system (transmission), and in the case of a study point for circuit breakers, current transformers, etc. To do.

  In addition, when the transmission voltage is 110 kV system or less and the location where “non-conformity” is the protection method examination location, the power station engineering section planning staff, the control section, the control station, and the transmission system examination location If it is, it is determined to be a power station transmission section, and if it is an examination point such as a circuit breaker / current transformer, it is determined to be a power station transmission / transformation section.

  As described above, the department in charge and the person in charge who determined the non-conforming equipment or specifications are identified, and a predetermined review request mail is automatically notified.

  In addition, the location of “nonconformity” is collated with the data of the examination item in the examination step table (FIG. 3) provided in the system planning DB 131, the department in charge of the corresponding item and the person in charge are identified, and the examination step table holds You can also set up to get data for email addresses.

  When the determination result is “adapted”, the system protection plan created by the protection method selection unit 125 is finalized. In the department in charge of construction, etc., based on the final power system plan, the facilities that make up the power system will be newly added or expanded.

  Furthermore, in the equipment table provided in the system plan DB 131, data on the power system equipment to be newly installed and added and data on the system protection plan are stored as finally determined data (equipment data storage means 124). In addition to the terminals of each department in charge connected via the communication network 2, the stored data is displayed on the terminal of the department in charge of equipment maintenance work, the department in charge of update planning work, etc. (system information Display means 128).

  In the example of the present embodiment, when the equipment data storage unit 124 stores the data as finalized data, “Yes” is set in the “confirmation flag” field of the equipment table (FIG. 2). The system information display means 128 can be set to permit display of data having a “determined flag” of “present” when a display request is received from a terminal other than the terminal of the person in charge of the department in charge.

  As a result, the examination history, examination data, examination results, etc. in the power system plan can be stored in the shared database, so that it can be used for equipment maintenance work, equipment renewal planning, etc. even after the construction of the power system. it can.

[Relay operation study]
The system planning support system 1 according to the present embodiment can perform the “relay operation” examination process not only when the power system is newly added or added, but also when the power transmission system is reviewed after the construction of the power system. In other words, when the transmission system is reviewed, the relay settling value is reviewed and whether there are restrictions on system protection, etc., when changing the phase arrangement of the transmission system, changing the wire type, cable length, tower structure, etc. Therefore, in the power transmission system after review, it is determined whether or not the system can be operated by continuing the conventional system protection format (protection method selection unit 125).

In this embodiment, it is performed by the terminal 3 of the head office distribution business headquarters or the terminal 6 of the power station engineering section, which is the department in charge of “system protection method determination / relay operation examination” (FIG. 6).
Details will be described based on the flow shown in FIG.

  The system protection system review process by the protection system selection unit 125 applies the data stored in the equipment table to the data stored in the legal table / in-house rules table prepared in advance, as in the system protection system determination process. Perform (FIG. 9).

  Similar to the process of determining the system protection method when the system protection device is newly installed or added as described in FIG. 10, is the system voltage 220 kV or higher (S301), the balanced power receiving terminal is 3 terminals or more (S302), and the influence of system stability It is determined whether or not there is a zero-phase circulating current (S304). If any of these is true, it is determined whether or not the existing device is a “current differential protection method” ( S305) If the existing device is the “current differential protection method”, the process ends.

  If the existing equipment is not the “current differential protection method”, the existing equipment registered in “Examination Step 4” is zero-phase circulation based on the data of the system protection relay equipment installation standards and design guidelines in the in-house rules table. It is determined whether or not current countermeasures are provided (S306). If the existing device has a zero-phase circulating current countermeasure, the process ends.

  If the existing equipment is not equipped with a zero-phase circulating current countermeasure, it is determined whether or not the tower arrangement registered in “Examination Step 2” can be changed based on the transmission tower design standard data in the in-house rules table ( S307). If the steel tower arrangement can be changed, the process is terminated.

  If it is not possible to change the tower arrangement, the process is terminated (S308) by revising the “line selection protection method” with zero-phase circulating current countermeasures (S308).

  On the other hand, if there is no zero-phase circulating current in S304, it is determined whether it is a small rear capacity or a non-ground fault power source location based on the data of the system protection relay device installation standard / design outline in the in-house rules table. Is made (S309). If it is a small rear capacity or a non-ground fault power supply location, the “transfer interruption protection method” is considered (S310), and the process is terminated.

  If it is not a small rear capacity or a non-ground fault power supply location, it is determined whether or not the protection system is a single line transmission line based on the data of the system protection relay device installation standards and design guidelines in the in-house rules table ( S311). When the protection system is a one-line transmission line, the “direction distance protection method” is considered (S312), and the process ends. On the other hand, if the protection system is not a one-line power transmission line, the processing is terminated as it is.

  Through the above processing, the system protection method is reviewed as necessary based on the facilities and specifications of the power system. The system protection method that has been reviewed is stored in the equipment table by the equipment data storage means 124.

  In addition, in response to the review of the power transmission system by the protection method selection unit 125, the compatibility determination unit 126 executes the simulation of the system protection operation (FIG. 6). The processing flow of the system protection operation simulation is the same as the flow shown in FIG.

  The equipment table provided in the system plan DB 131 as the finally determined data, such as the data of the equipment and the like that have been reviewed for the power transmission system and the data of the system protection plan in response to the determination of “conformity” in the system protection operation simulation (Equipment data storage means 124). The stored data is displayed on the terminal of each department in charge by the system information display means 128.

[Second Embodiment]
In the first embodiment, at the time of new / addition of a power system, a system protection operation simulation is executed in response to the examination of the types, specifications, setting values, etc. of the equipment constituting the power system and the determination of the system protection method ( The conformity determination means 126) displays the determination result of “nonconformity” by e-mail or the like on the terminal of the department in charge of the examination step that needs to be reexamined when it is determined as “nonconformity” (determination result display means 127).

  In the determination result display means 127 of the second embodiment, the department in charge examines the input screen of the dedicated program that determines and calculates the type, specification, setting value, etc. of the equipment that has been determined as “non-conforming” as the determination result display method. The difference is that the item can be displayed on the terminal of the person in charge.

  In the display of the input screen, for example, the input area of the corresponding data is made conspicuous by color change or the like, and the data plan such as the appropriate equipment type / specification / set value calculated by the suitability determining means 126 is displayed in the data input area. Can be displayed in the margin of.

  Thereby, the person in charge can review again, referring to data, such as an appropriate kind, specification, and set value of equipment.

  When the person in charge inputs the change of data, the program execution means 129 extracts data such as the type, specification, and set value of the equipment determined and calculated based on the data of the changed examination item in the subsequent examination step. The dedicated program input screen is displayed on the terminal of the person in charge of the department in charge.

  By repeating these processes, the data changed in all necessary examination steps is input, and the plan of the system facility after the change is created. When the system facility plan is created, the protection system selection means 125 is executed to determine the system protection system based on the changed system facility plan.

  In the system protection operation simulation, “conformity” or “nonconformity” is determined based on the changed system facility plan and the changed system protection system (compatibility determination unit 126). If the determination result is “nonconforming”, the process is repeated again.

  As a result, the process is repeated until a determination result of “adaptation” is obtained, so that an appropriate system protection plan can be determined with certainty.

  In the present embodiment, it is also possible to manage the security of the person in charge who performs the examination operation on the terminal. Specifically, by storing the ID / password of the person in charge in the examination step table of the system plan DB 131, the program execution unit 129 displays an operation screen on the terminal of the person in charge of the department in charge of the examination item. At this time, it is possible to set so that the input to the operation screen is permitted only when the authentication by the ID / password is performed and the identity is confirmed.

  Furthermore, in the first embodiment, the person in charge of the department in charge of performing automatic e-mail notification is determined in advance. However, in this embodiment, the person in charge of the next examination based on the input contents of the examination step. Can be determined.

  Specifically, the type of equipment, numerical range, task difficulty, etc. set in the previous examination steps are stored in the database in association with the person in charge, and examination is performed from multiple persons in charge. The person in charge suitable for the contents of the equipment can be determined. In this case, the type of equipment that can be examined by the person in charge, the rank of person in charge based on the carrier, etc. are stored in a database. The program execution means 129 compares the input data in each examination step included in the equipment table of the system plan DB 131 with the data held in the person in charge database, and selects the person in charge.

  In response to the selection of the person in charge, the program execution unit 129 acquires the mail address of the person in charge from the examination step table of the system plan DB 131 and performs automatic notification by e-mail.

  As described above, according to the system planning support system 1 of the present invention, it is possible to shorten the examination time by integrating the examination steps of the department in charge assigned to each examination content with a unified program. .

  In addition, when the examination at each examination step is completed, the department in charge of the examination is automatically notified of the completion of the examination by e-mail, etc., so that the communication is prevented and the work is performed reliably. Can do.

  In addition, the examination results at each examination step are stored in a single database, and the database is shared by all the departments in charge, so that the examination is performed based on the same data, and the examination accuracy is greatly improved. Furthermore, since data necessary for system protection is stored in a single database, it is possible to simulate system protection operation and improve examination accuracy.

  In addition, the examination history, examination data, examination results, etc. are stored in a single database, so it can be used for equipment maintenance work and equipment renewal planning even after construction of the power system. .

It is a functional block diagram of the system planning support system 1 concerning this embodiment. It is a structural example of the installation table of the system | strain plan DB131 in the memory | storage part 13 of FIG. It is an example of a structure of the examination step table of the system | strain plan DB131 in the memory | storage part 13 of FIG. 3 is a configuration example of a law table and an in-house rule table of a law and in-house rule DB 132 in the storage unit 13 of FIG. It is an example of the exclusive program which the exclusive program DB133 in the memory | storage part 13 of FIG. 1 hold | maintains. It is the figure which showed the whole work flow in the system | strain plan assistance system 1 of this embodiment. It is the figure which showed the correlation of the process flow of the examination step in the system | strain plan assistance system 1 of this embodiment. In the system plan support system 1 of this embodiment, it is a figure explaining the determination of the system | strain protection system based on the law table and internal company table of law | company internal database DB132. In the system plan support system 1 of this embodiment, it is a figure explaining the relationship between the equipment table of system plan DB131, and the law table and company internal table of law / internal standard DB132. It is the figure which showed the flow which determines the system | strain protection system in the system | strain plan assistance system 1 concerning this embodiment. It is the figure which showed the flow which performs the system | strain protection operation simulation in the system | strain plan assistance system 1 concerning this embodiment. FIG. 12 is a diagram for explaining identification of a study location by a determination result display unit 127 when the system protection operation simulation of FIG. 11 is “nonconforming”. It is the figure which showed the flow which examines relay operation in the system | strain plan assistance system 1 concerning this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 System planning support system 2 Communication network 3 Headquarters distribution business headquarters 4 Construction organization power transmission section terminal 5 Construction organization power generation and transformation section terminal 6 Power station engineering section terminal 7 Power station transmission section terminal 8 Power station power generation and transformation section terminal 9 Power station control Stations 11, 31, 41, 51, 61, 71, 81, 91 Transmitter / receivers 12, 32, 42, 52, 62, 72, 82, 92 Central processing units 13, 33, 43, 53, 63, 73, 83, 93 Storage unit 14, 34, 44, 54, 64, 74, 84, 94 Input unit 15, 35, 45, 55, 65, 75, 85, 95 Output unit 121 Transmission / reception processing unit 122 Input / output processing unit 123 System Equipment selection means 124 Equipment data storage means 125 Protection method selection means 126 Suitability determination means 127 Determination result display means 128 System information display means 129 Program execution means 131 Statistics image DB
132 Legal / In-house database
133 Dedicated Program DB

Claims (6)

A system planning support system for supporting power system planning work,
On the terminal of the department in charge of work necessary for system planning, from a plurality of programs prepared in advance, a program execution means that enables operation of the program according to each work process,
Based on the operation of the program in the terminal, system equipment selection means for selecting equipment constituting the power system,
Equipment data storage means for associating and storing the data of the equipment selected by the system equipment selection means and the respective business processes in a database;
Protection method selection means for selecting a system protection method based on equipment data stored by the equipment data storage means and reference data used as a reference for system protection provided in advance,
Equipped with a,
The program execution means, upon completion of the examination of the system equipment at the terminal provided in the department in charge of the preceding business process, the examination of the system equipment in the preceding business process is completed on the terminal provided in the department in charge of the continuous business process system planning support system which is characterized that you display the data that shows. Suitability for simulating the operation of power system protection based on the system protection system selected by the protection system selection means and the reference data used as a standard for system protection provided in advance to determine whether the system protection system is compliant or not A determination means;
In response to the nonconformity determination by the conformity determination means, extract a non-conforming business process, and a determination result display means for displaying a nonconformity determination result on a terminal provided in a department in charge of the business process;
The system planning support system according to claim 1, further comprising: 3. The system planning support system according to claim 1, wherein the reference data in the protection method selection means and the suitability determination means is data including a law and internal rules. The protection scheme selecting unit, when performing a review of post-construction of the power system to the purpose of restrictions on the relay operational presence and relay of claim 1, wherein determining a revision of setting value of The system planning support system according to any one of the above. The system protection method selected by the protection method selection means is stored in the database,
After construction of the power system, the terminal of each department in charge of maintenance work and updating planning operation of equipment, claims 1, characterized in that it comprises a system information display means for displaying the database via the network 4 System planning support system as described in any one of. In response to the determination result of nonconformity by the conformity determination unit, the program execution unit and the protection method selection unit execute again at the terminal of the department in charge of the non-conforming business process,
The system planning support system according to any one of claims 1 to 6 , wherein the process is repeated until the suitability is judged by the suitability judging means.