JP3887751B2 - Power system distributed monitoring and control system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power system distributed monitoring control apparatus including a plurality of distributed computers, such as a power system monitoring control system, and more particularly to a technique for managing a maintenance subject of power system facility data.
[0002]
[Prior art]
Generally, facilities that make up a power system include generators, transmission lines, transformers, switches, etc. In a power system monitoring and control system that monitors and controls the power system, data on these components Constitutes records by type, and these records together form a so-called equipment database.
If these power systems are added / deleted / changed (for example, addition of transmission lines, expansion of substations, capacity changes, etc.), the online operation will not be affected while the equipment database is maintained. In addition to the online equipment database used for online operations, the maintenance equipment database that can be changed offline is available. Updating to the equipment database (operation switching).
In addition, maintenance equipment databases are divided into online operation switching units, and are managed by subject so that they can be created and confirmed separately before the operation switching date (subject management). Each subject is created, confirmed, and switched in order of normal operation switching date (in chronological order).
Power system facilities are expanding and becoming more complex year by year, and power system monitoring and control systems for this purpose are required to have higher performance and higher reliability. Multiplexing and decentralized system configurations have been adopted. It consists of multiple computers.
Conventionally, as a distributed computer system composed of a plurality of computers and its database switching method, those disclosed in Japanese Patent Application Laid-Open No. 11-242607 are known. In other words, in a distributed computer system consisting of a main computer that performs online operations, a test computer that simulates (simulates) online operations, and a maintenance computer that maintains a maintenance facility database, the subject status of each computer's facility database ( During operation, testing, creation, etc.) during maintenance of the equipment database, during testing, or when the equipment database with abnormal test results is erroneously written and updated in the online equipment database, or after testing It has a function to interlock the user's erroneous operation so as not to accidentally change the equipment database determined for online use.
[0003]
[Problems to be solved by the invention]
However, in the above prior art, the subject management of a plurality of maintenance facility databases possessed by the maintenance computer has not been studied.
According to a general equipment data subject management method, there is a method of having all equipment data for each subject, but there is a problem that enormous memory capacity is required as the number of subjects increases and equipment data increases. .
In addition, there is no problem when multiple subjects are arranged in time series, but the operation switching date is changed and the subject time-series order is changed, and it is necessary to change the equipment data before the latest subject. In that case, since then, the equipment data of the subject must be changed to the latest, and there is a problem that it takes a lot of time to change the equipment data.
[0004]
It is an object of the present invention to create maintenance equipment data of a plurality of subjects without depending on time series in a power system distributed monitoring control system in which additions and changes of equipment are frequently performed, and efficiently subject with a small memory capacity. It is an object of the present invention to provide a power system distributed monitoring and control device that can be managed.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a distributed power system system composed of a plurality of computers, and the maintenance equipment database includes changes between the master data currently in operation and the subjects that are units of maintenance. The maintenance computer has a subject management function unit that manages each subject in the maintenance equipment database, an equipment data change function part that changes maintenance equipment data, and a maintenance equipment. An equipment database expansion function section for expanding data for online use and an equipment database switching function section for switching the online equipment database of each computer are provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram of a power system distributed monitoring and control apparatus according to an embodiment of the present invention, which simulates a dual system main computers A and B that execute monitoring control in a power system online and an online operation (simulation). ) Shows an example of a system (a power system monitoring and control computer system) including a test computer C and a maintenance computer D that maintains an equipment database (hereinafter, abbreviated as equipment DB).
In FIG. 1, the main computers A and B and the test computer C are online equipment DBs 101, 201, which are used in online operations such as power system voltage and current monitoring, generator control, and switch on / off operation commands. 301 and the equipment DB switching function unit 11, 21, 31 for updating the online equipment DB 101, 201, 301 of each computer in the online equipment DB 401 of the maintenance computer D.
Further, the maintenance computer D includes an online equipment DB 401 used as an expansion area for updating the online equipment DBs 101, 201, and 301, and master data currently being used for maintenance work such as change / addition / deletion of equipment data. Maintenance facility equipment DB 402 that is stored separately in the difference data for each subject that is a unit of maintenance, maintenance equipment data 403 that is used for the change of maintenance equipment data and the extraction of the difference between changed parts, and after the change Equipment data 404, subject information table 405 that holds the status and operation switching date of each subject in maintenance equipment DB 402, subject management function unit 41 that manages each subject in maintenance equipment DB 402 by subject management table 405, maintenance Equipment that changes equipment data Data change function unit 42, an equipment DB development function unit 43 that develops post-change equipment data 404 in the online equipment DB 401, and an equipment DB that updates the online equipment DBs 101, 201, and 301 of each computer with the online equipment DB 401. A switching function unit 44 and a data input / output device 51 that outputs instruction data and change data to each of the function units 41, 42, 43, and 44, and outputs processing results thereof.
The prerequisites for this system are as follows.
(1) The main computers A and B form a dual system. The main computers A and B already have the facility DBs stored in the online facility DBs 101 and 201, and the online facility DBs 101 and 201 are exactly the same. Content.
(2) The main computer A is operating an online operation as a master system, while the main computer B is offline and is a slave system of the main computer A.
(3) The test computer C performs a simulation test of the online work using the online facility DB 301 and a simulation test of the online DB itself.
[0007]
Next, an example of the configuration of the subject information table 405 provided in the maintenance computer D is shown in FIG.
The subject information table 405 includes a transition state (subject state column 407) of the maintenance facility DB 402 for each subject and an operation switching date column 408 for updating the maintenance facility DB 402 to the online facilities DB 101 and 201 of the main computers A and B. Each number column 406 is stored.
The subject status column 407 changes as time passes, and manages the history of the maintenance facility DB 402, and is designated as “Creating”, “Testing”, “Tested”, “Switching”, “In operation”. .
[0008]
Here, the procedure by the general equipment database switching method in said structure and the subject state of each step are demonstrated using FIG.
Here, since it takes time and efficiency to re-create all equipment DBs first, the equipment data of the designated subject in the maintenance equipment DB 402 of the maintenance computer D having the same initial value as the online equipment DB is subject. After the change by the management function unit 41, the equipment data 404 is called, the equipment data change function part 42 is changed (S11), and the equipment DB development function part 43 develops it to the online equipment DB 401 (S12). Subject status column 407 = “Creating” >>.
Next, the facility DB switching function unit 44 of the maintenance computer D and the facility DB switching function unit 31 of the test computer C collectively update the online facility DB 301 of the maintenance computer D to the value of the online facility DB 401 of the maintenance computer D. (S13) Then, the updated online equipment DB 301 is subjected to a simulation test with the test computer C (S14) << Subject status column 407 = "under test">>.
It is determined whether or not there is a problem in the online equipment DB 301 updated by the simulation test by the test computer C (S15). As a result, if there is a problem (that is, “No”), the maintenance is performed again. Redo from the step (S11) of changing the facility DB 402.
On the other hand, when there is no problem in the test in the above step (S15) (that is, in the case of “Yes”), the subject status column 407 = “Tested” at this time is the main computer that was in operation first. A is offline and the main computer B, which is a standby system, is brought online (S16), and the maintenance computer D equipment DB switching function unit 44 and the main computer A equipment DB switching function unit 11 are used for the online operation of the main computer A. The equipment DB 101 is collectively updated to the value of the online equipment DB 401 of the maintenance computer D that has changed (S17).
Next, the main computer B is set offline and the main computer A is set online (S18), and the equipment DB switching function unit 44 of the maintenance computer D and the equipment DB switching function unit 21 of the main computer B are used to install the main computer B online equipment. The DB 201 is collectively updated to the value of the online equipment DB 401 of the changed maintenance computer D (S19) << Subject status column 407 = "switching" at this time >>.
With the above procedure, the updating and switching of the equipment DB is completed << the subject status column 407 at this time = “in operation” >>.
[0009]
Next, subject management in the maintenance computer D, which is a feature of the present invention, will be described.
The pre-change equipment data 403 and post-change equipment data 404, as shown in FIG. 4, have the type (transformer, circuit breaker, disconnector, etc.) and information (position, equipment, setting) of each equipment data in record format. ing.
As shown in FIGS. 1 and 5, the maintenance facility DB 402 performs batch management of the facility DB of each subject on the relational database management system (RDBMS), and difference between the master part (current data) for each facility data. Has data (data for each subject change). The difference data is a change from the master data, and is data that is maintained, changed, modified, and created by each subject. That is, a database corresponding to each subject name is obtained by combining the master data and the difference data.
The maintenance facility DB 402 in FIG. 5 has a creation date and a deletion date for each record, and each data is valid in the subject number column 406 because the subject operation switching date column 408 is between the creation date and the deletion date. This is the case. Based on the creation date and the deletion date, a database corresponding to each subject number column 406 is extracted.
The definition of each date is shown below.
(The date is YYMMDD (YY: year, MM: month, DD: day), and the year indicates the last two digits of the year.)
-Creation date: Date of switching the subject that created the data (If any subject is valid, the minimum number of valid dates = 000000)
-Deletion date: The switching date of the subject from which the data was deleted (if any subject is valid, the maximum number of valid dates = 999999)
Data in each subject number column 406 is extracted from each table by the following inequality based on the creation date and the deletion date.
Inequality: creation date ≦ operation switching date <deletion date Here, ◯ indicates data extracted with the subject, and X indicates data not extracted with the subject.
[0010]
A method for changing the maintenance facility DB 402 in the above configuration will be described with reference to FIG.
The subject management function unit 41 determines whether the subject number input from the data input / output device 51 already exists in the subject number column 406 of the subject status table 405 (S21), and when there is no subject number (that is, “No”). In the case), the data is extracted from the maintenance facility DB 402 with the past operation switching date closest to the operation switching date input from the data input / output device 51 as a key, and the pre-change facility data 403 is created (S22). The previous equipment data is copied to the changed equipment data 404 (S27). If the subject number already exists (ie, “Yes”), it is determined whether the subject status column 407 stored in the subject status table 405 is in operation (S 23). If the subject number is in operation (ie, “Yes”). In the case of ()), the data input / output device 51 is notified of the error and the process ends (S24). When the subject status column 407 is not in operation (that is, “No”), the data is extracted from the maintenance facility DB 402 using the operation switching date of the input subject number as a key, and the pre-change facility data 403 is created. (S25), the pre-change equipment data is copied to the post-change equipment data 404 (S27).
The equipment data change function unit 42 changes or corrects the changed equipment data 404 in accordance with the instruction input from the data input / output device 51 (S28).
The subject management function unit 41 compares the pre-change equipment data 403 and the post-change equipment data 404 in accordance with the end instruction from the data input / output device 51 and writes the difference in the difference data of the maintenance equipment DB 402 (S29). The subject status column 407 of the subject number in the table 405 is being created (S30), and the subject number after the operation switching date after the specified subject was in the subject status table 405 (the equipment data before the latest subject has changed) In this case, the subject status column 407 of the subject number is returned to the creation state (S31).
[0011]
A system diagram example of each subject in the maintenance facility DB 402 in FIG. 5 will be described with reference to FIGS. In addition, this example changes, adds, and deletes the track (combination of two disconnectors LS and one breaker CB) in the order of subject numbers = 2, 3, 4, and 5 with respect to the subject number = 1 currently in operation. It is what went. However, the operation start date (2002/04/15) with the subject number = 5 is set to be before the operation start date (2002/05/06) with the subject number = 4, and the time series is changed.
[0012]
FIG. 7 is a system diagram example with subject number = 1 currently in operation (operation switching date = 2002/02/04), and FIG. 8 shows the maintenance facility DB 402. Since the disconnectors LS11, LS12 to LS51, LS52, circuit breakers CB1 to CB5, and transformer TR1 of each record in the maintenance facility DB 402 all satisfy the above inequality (creation date ≦ operation switching date <deletion date), All are valid. All records currently in operation are handled as master data.
[0013]
9 is a system diagram example of subject number = 2 (switching: operation switching date = 2002/03/04) in which CB4 in FIG. 7 (subject number = 1: in operation) is changed to CB4 ′. Indicates the maintenance facility DB 402. The master data CB4 before the change in the maintenance facility DB 402 is invalid because the deletion date is the same as the operation switching date, and the difference data CB4 ′ after the change is valid because the creation date is the same as the operation switching date.
[0014]
FIG. 11 is a system diagram example of subject number = 3 (tested: operation switching date = 2002/04/08) obtained by adding LS61, CB6, and LS62 to FIG. 9 (subject number = 2: switching). Reference numeral 12 denotes the maintenance facility DB 402. The difference data LS61, CB6, and LS62 added to the maintenance facility DB 402 are valid because the creation date is the same as the operation switching date.
[0015]
FIG. 13 is a system diagram example of subject number = 4 (during testing: operation switching date = 2002/05/06) obtained by deleting LS51, CB5, and LS52 from FIG. 11 (subject number = 3: tested). Reference numeral 14 denotes the maintenance facility DB 402. The master data LS51, CB5, LS52 deleted from the maintenance facility DB 402 is invalid because the deletion date is the same as the operation switching date.
[0016]
FIG. 15 shows a change in the time series, and subject number = 5 (under test: operation switching date = 2002/04/15) obtained by adding LS71, CB7, and LS72 to FIG. 11 (subject number = 3: tested). FIG. 16 shows the maintenance facility DB 402. The difference data LS71, CB7, LS72 added to the maintenance facility DB 402 is valid because the creation date is the same as the operation switching date.
At this time, since the equipment data before the latest subject (subject number = 4: operation switching date = 2002/05/06) has changed, the operation switching date is subject number = 5 (operation switching date = 2002/04). The subject status of subject number = 4 (under test: operation switching date = 2002/05/06) after / 15) returns to being created.
[0017]
FIG. 17 shows that the equipment data before the latest subject (subject number = 4: operation switching date = 2002/05/06) with the subject number = 5 (operation switching date = 2002/04/15) in FIG. 15 has changed. FIG. 18 is a system diagram example displaying the latest subject (subject number = 4: creating: operation switching date = 2002/05/06), and FIG. 18 shows the maintenance facility DB 402.
Here, unlike the system diagram example of the subject number = 4 (under test) in FIG. 13, the difference data LS71, CB7 added to the maintenance facility DB 402 with the subject number = 5 (operation switching date = 2002/04/15), The LS 72 is valid because the creation date is before the operation switching date. Thereby, even if a change occurs in the equipment data before the latest subject, it can be seen that the change contents are reflected in the equipment data of the subject from that time to the latest without special processing.
[0018]
Next, transition examples of master data and difference data in the maintenance facility DB 402 in FIG. 5 will be described with reference to FIGS. Note that the timing at which the master data and the difference data in the maintenance facility DB 402 are changed is when the subject state 408 of each subject is in operation, and the processing at that time is as follows.
(1) The difference data of creation date ≦ operation switching date is set as master data.
Note that the creation date = 000000.
(2) Delete master data of deletion date ≦ operation switching date.
FIG. 19 shows the maintenance facility DB 402 when the subject number = 2 in FIG. 5 (operation switching date = 2002/03/04) is in operation. The master data CB4 (deletion date = 2002/03/04) in the maintenance facility DB 402 is deleted, and the difference data CB4 ′ (creation date = 2002/03/04) becomes master data.
FIG. 20 shows the maintenance facility DB 402 when the subject number = 3 (operation switching date = 2002/04/08) in FIG. 19 is in operation. The difference data LS61, CB6, LS62 (creation date = 2002/04/08) of the maintenance facility DB 402 becomes master data.
FIG. 21 shows the maintenance facility DB 402 when the subject number = 5 (operation switching date = 2002/04/15) in FIG. 20 is in operation. The difference data LS71, CB7, LS72 (creation date = 2002/04/15) of the maintenance facility DB 402 becomes master data.
FIG. 22 shows the maintenance facility DB 402 when the subject number = 4 (operation switching date = 2002/05/06) in FIG. 21 is in operation. The master data LS51, CB5, LS52 (deletion date = 2002/05/06) in the maintenance facility DB 402 is deleted.
[0019]
【The invention's effect】
As described above, according to the present invention, maintenance of power system equipment data of a power system distributed monitoring and control system in which equipment is frequently added or changed without depending on time series of maintenance equipment data of multiple subjects. Even if there is a change in the equipment data before the latest subject, the changes are reflected in the equipment data of the subject from then on to the latest without any special processing, and there is little memory. The subject can be managed efficiently with the capacity.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a power system distributed monitoring and control apparatus according to an embodiment of the present invention. FIG. 2 is an example of a configuration of a subject information table 405 possessed by a maintenance computer of the present invention. FIG. 4 is a flow chart for explaining the procedure according to the present invention. FIG. 4 shows an example of the configuration of the pre-change equipment data 403 and post-change equipment data 404 of the present invention. Example (when subject number = 1 is in operation)
FIG. 6 is a flowchart for explaining a method for changing a maintenance facility database according to the present invention. FIG. 7 is a system diagram example with subject number = 1 (in operation: operation switching date = 2002/02/04) according to the present invention. Structure of maintenance facility DB 402 with subject number = 1 of the present invention FIG. 9: System diagram example with subject number = 2 of the present invention (under construction: operation switching date = 2002/03/04) FIG. Configuration of maintenance facility DB 402 with subject number = 2 [FIG. 11] Example of system diagram with subject number = 3 of the present invention (under construction: operation switching date = 2002/04/08) [FIG. 12] Subject number of the present invention = Configuration of maintenance facility DB 402 = 3 [Fig. 13] Example of system diagram with subject number of the present invention = 4 (Creating: Operation switching date = 2002/05/06) [Fig. 14] Subject number of the present invention = 4 Maintenance equipment DB40 FIG. 15 is a system diagram example of subject number = 5 of the present invention (in preparation: operation switching date = 2002/04/15). FIG. 16 is a configuration of a maintenance facility DB 402 having subject number = 5 of the present invention. FIG. 17 is an example of a system diagram in the case where the latest subject is displayed after a change has occurred in the equipment data before the latest subject of the present invention (subject number = 4: operation switching date = 2002/05/06). The latest subject of the invention (subject number = 4: operation switching date = 2002/05/06) Configuration of the maintenance subject DB 402 of the latest subject after the change has occurred in the equipment data before the change [FIG. 19] Subject number of the present invention = Configuration of maintenance equipment DB 402 when 2 is in operation [FIG. 20] Subject number of the present invention = Configuration of maintenance equipment DB 402 when 3 is in operation [FIG. 21] Subject number of the present invention = 5 is in operation [Description of sign construction of the maintenance equipment DB402 when the construction of maintenance facilities DB402 [Figure 22] Subject number = 4 of the present invention has been made during the operation at the time was
A, B ... main computer, C ... test computer, D ... maintenance computer, 11, 21, 31 ... equipment DB switching function part, 41 ... subject management function part, 42 ... equipment data change function part, 43 ... equipment DB deployment function , 44 ... equipment DB switching function section, 51 ... data input / output device, 101, 201, 301, 401 ... online equipment DB, 402 ... maintenance equipment DB, 403 ... equipment data before change, 404 ... equipment data after change 405 ... Subject information table 406 ... Subject number column 407 ... Subject status column 408 ... Operation switching date column

Claims (3)

A power system distributed computer system composed of a plurality of computers for maintaining at least two main computers each having an on-line facility database storing facility data, and the on-line facility database of the main computer A maintenance computer having a maintenance equipment database, and an on-line equipment database, and a test computer for switching to the online equipment database created by the maintenance computer and performing a simulation test of the online equipment database. In the power system distributed monitoring and control system,
In the maintenance equipment database, the master data that is currently in operation and the difference data for each change that is a unit of maintenance are separately stored and held in the maintenance computer. A subject management function for managing the subject, an equipment data change function for changing maintenance equipment data, an equipment database development function for developing maintenance equipment data online, and an online equipment database for each computer And a facility database switching function unit for switching between power systems. 2. A subject status table is provided, and the subject status table updates the transient status of the maintenance facility database of each subject and the maintenance facility database to the online facility database of the two main computers. An electric power system distributed monitoring control device, wherein an operation switching date is stored for each subject. 3. The maintenance management device according to claim 2, wherein the subject management function unit uses the operation switching date of the inputted designated subject as a key when the inputted designated subject is in the subject status table and is not in operation. Extract the data from the database, create the equipment data before the change, copy the equipment data before the change to the equipment data after the change, while the equipment data change function unit, according to the input instructions, the equipment data after the change Then, the subject management function unit compares the pre-change equipment data with the post-change equipment data and writes the difference in the maintenance equipment database differential data, and the subject status table When the entered subject is being created, and the subject whose operation switching date is later than the entered subject is in the subject status table Is the power system distributed monitoring control device and returning while creating its subject.

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