JPH02299424A - Trouble restoring operation for electric power system - Google Patents

Abstract

PURPOSE:To permit the quick restoration of an electric power system by a method wherein restoration logics are developed in respective corresponding facilities through parallel processes upon trouble without waiting the execution of operation such as power supply, power re-supply or the like to produce a system restoration commanding sequence. CONSTITUTION:Processes of trouble detection, decision of facility of service interruption, trouble facility decision and the like are carried out to decide a trouble facility and, thereafter, restoration logic upon trouble when the trouble facility is supported to be a definite one and the restoration logic upon trouble when the accidental facility is supported to be an indefinite trouble facility are developed simultaneously in parallel to the execution of the production of power resupplying sequence and executive processes. Subsequently, the production of restoration commanding sequences of respective systems are finished and, thereafter, a result after finishing the power re-supplying operation and the produced system restoration commanding sequence are operated in conjunction with each other whereby the accident in the power system may be restored.

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to a power system fault recovery operation method for dealing with recovery when a wide-area power system fault occurs.

[Conventional technology]

Figure 2 shows, for example, automatic restoration in the event of an accident in a conventional electric power system as shown in Kasuya, Oda et al.'s Electrical Engineering Theory B, Vol. 109, No. 4, 1989, "Accidents in Local Supply Systems - Development of Recovery Operation Methods J. This is a conceptual diagram of the operation method. In the figure, ■ is the computer, 2 is the basic configuration data of the electric power system, 3 is the online input data, and 4 is the recovery procedure that is the recovery operation in the event of a system failure output by the computer 1. Next, the operation will be explained. First, the electronic computer 1, which is the core of the automatic restoration control system, collects basic configuration data 2 and online input data 3 of the electric power system in charge, and outputs restoration procedure data 4. The basic configuration data 2 of the power system shows equipment name data such as circuit breakers, disconnectors, power transmission and distribution lines, transformers, generators, etc. that make up the power system in charge, and the adjacency relationship of these equipment groups. combined data,
Allowable power capacity data for equipment groups such as transmission lines, busbars, transformers, and power sources are prepared. When an accident occurs, in order to restore the power system when an accident occurs, the substation system computer and the power supply system computer share the processing according to the flowchart shown in Figure 3, and the computers are organically connected via the transmission network. This allows for the integration of commands and operations. First, in Step STI, when a power system accident occurs, it automatically detects the occurrence of the accident based on display measurement information input from the substation system, and also determines the status of charging and power outage equipment based on operation information of circuit breakers, protection relays, etc. Determine faulty equipment within the system. Next, in step ST2, if the power transmission line is determined to be an accidental equipment based on the accidental equipment determination result, it is determined whether the conditions for power retransmission are satisfied. If possible, create a power retransmission operation procedure, automatically transmit the command to the substation system, and after performing the operation of the substation system, determine the result of the power retransmission operation from the displayed measurement information and confirm the faulty equipment. . If not, it is determined that the accident equipment is in accordance with the accident equipment determination result. In addition, in step ST3, the system that remains in a power outage state even after the power supply retransmission process is set as the system to be restored, and the accident recovery logic is developed, and the system that can actually be restored without overloading (hereinafter referred to as the restoration decision system) is developed. ). Furthermore, in step ST4, the current system after the accident is compared with the restoration determined system, and a system restoration command procedure is automatically created to change the system configuration from the current system to the restoration determined system. Similar to the power retransmission operation, this system restoration command procedure is automatically transmitted to the substation system as a power supply command, and the substation system executes the operation.

[Problem to be solved by the invention]

The conventional power system accident recovery operation method is carried out as described above, so when an accident occurs on a power transmission line, until the faulty equipment is determined during the work to determine the result of the power retransmission operation, Since it is not possible to develop the next fault recovery logic, there is a delay in creating a system recovery command procedure for a grid that is in a power outage state and has not yet been processed even after the power retransmission process, making it impossible to quickly restore the power system. was there. This invention was made in order to solve the above-mentioned problems, and it is possible to set temporary fault equipment on the power transmission line in parallel without waiting for the execution result of the power retransmission operation, and to develop the fault recovery logic. The purpose of this study is to obtain a power system accident recovery operation method that can quickly create a system restoration command procedure and restore the power system.

[Means to solve the problem]

The power system accident recovery operation method according to the present invention executes the accident detection/power outage equipment judgment and faulty equipment judgment processing group to determine the faulty equipment, and then, in parallel with the execution of the power retransmission procedure creation/execution processing group. , we simultaneously develop the accident recovery logic when it is assumed that the equipment that has been judged to have had an accident is a confirmed accident equipment, and the accident recovery logic when it is assumed that the accident equipment is not a confirmed accident equipment. After the creation of the system restoration command procedure is completed, the result after the completion of the power supply retransmission operation and the created system restoration command procedure are operated in conjunction with each other to restore the power system from an accident.

[Effect]

The power system accident recovery operation method according to the present invention is based on the fault detection/power outage equipment determination and failure equipment determination processing group, without waiting for the results of the power supply retransmission procedure creation/execution processing group, and detecting the temporary accidental equipment and non-accident equipment. By processing two accident recovery logics in parallel, grid recovery command procedures can be quickly created.
Enables system restoration command execution.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as in FIG. 3 are designated by the same reference numerals, and since the operation of the substation system section is the same as that of the prior art, the explanation will be omitted. In the figure, step STI is an accident detection/power outage equipment determination, accident equipment determination processing group, step ST2 is a power retransmission procedure creation/execution processing group, step ST3 is an accident recovery logic process,
Step ST4 is a system restoration command procedure creation/execution processing group;
Step ST5 is a processing group for creating an accident recovery logic/system restoration command procedure when an accident occurs on a power transmission line, and step ST6 is a processing group for executing a system restoration command when an accident occurs on a power transmission line. Next, the operation will be explained. First, after completing step ST1, if it is determined that there is no power transmission line accident as a result of the accident equipment determination, steps ST3 and ST4 are executed, and the process ends. The operations of Sr3 and Sr1 are the same as those in the prior art, so the explanation will be omitted. After the STI ends, if it is determined that a power transmission line accident has occurred, proceed to step ST2.
and step ST5 are operated in parallel. The operation of step ST2 is the same as that of the prior art, and will therefore be omitted. On the other hand, in step ST5, accident recovery logic and system recovery designation procedures are created for both the cases where the transmission line is an accidental equipment and a case where the transmission line is not an accidental equipment. In other words, for a power transmission line that has been determined to be a faulty facility, fault recovery logic is developed using a power system that is assumed to be a faulty facility even after power supply and retransmission as a restoration target system. Then, create a system restoration command procedure. The operation of the accident recovery logic is the same as step ST3 of the conventional technology, and the operation of creating the system recovery command procedure is step S.
It is similar to T4. In parallel with the above processing, the following processing is performed in parallel. We develop accident recovery logic using the power system as a recovery target system, assuming that the transmission line determined to be the faulty equipment will be restored after power is retransmitted (the transmission line is not the faulty equipment), and then we will develop the fault recovery logic in the system to be restored. Create. Next, in step ST6, based on the result of determining whether the power transmission line is an accidental equipment obtained in step ST2 in determining the accidental equipment,
If the power transmission line is determined to be the faulty equipment, in step ST5, the grid restoration command procedure created by developing the accident recovery logic for the faulty equipment is officially adopted as the grid restoration command procedure. In addition, if it is determined that it is not the equipment that caused the accident, step S
In T.5, assuming that the equipment is not in an accident, adopt the system restoration command procedure created by developing the accident recovery logic. The system restoration command is executed based on the procedure adopted as described above. Regarding the operation of executing the grid restoration command, step S of the conventional technology is used.
It is similar to T4. In the above embodiment, a case was described in which a power supply retransmission operation was performed in the event of a power transmission line fault, but the same applies to the case of restoration using a power retransmission function using a reclosing device, and step ST2 in FIG. By replacing the function with the function of determining success or failure of restoration by the device, the same effect can be achieved by executing step ST5 in parallel without waiting for determination of success or failure of power retransmission. Furthermore, regarding the parallel operation of each function in the above embodiments, it is possible to further speed up the recovery of the power system by constructing a load distribution system such as a multi-CPU.

【Effect of the invention】

As described above, according to the present invention, it is possible to develop the accident recovery logic for each applicable equipment and create a system recovery command procedure using parallel processing without waiting for the execution of power retransmission operations such as power retransmission. Since the system is configured as follows, it is possible to quickly create a system restoration command procedure, which has the effect of shortening the time during which supply is interrupted due to the occurrence of an accident in the power system.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing a power system accident recovery operation method according to an embodiment of the present invention, FIG. 2 is a conceptual diagram of a conventional power system accident recovery operation method, and FIG. 3 is a flowchart showing a conventional power system accident recovery operation method. FIG. In the figure, 1 is a computer, 2 is basic configuration data of the power system, 3 is online input data, 4 is recovery procedure data, STI is accident detection / power outage equipment judgment, faulty equipment judgment processing group, Sr1 is power retransmission procedure Creation/execution processing group, Sr
5 is a processing group for creating an accident recovery logic/system restoration command procedure when a transmission line accident occurs, and Sr1 is a processing group for executing a system restoration command when a transmission line accident occurs. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] When an accident occurs in a power system, the basic configuration data and online input data of the power system are input into a computer, and the power outage equipment is determined for the system immediately after the accident, where the connection state has changed due to the power outage, and In the power system accident recovery operation method, which outputs and executes recovery procedure data for automatically restoring the power system based on the information of the power outage equipment and the accident equipment, determining the faulty equipment among the equipment, When an accident occurs on a power transmission line, execute the accident detection/outage equipment determination and faulty equipment determination processing groups to determine the faulty equipment, and execute the power retransmission procedure creation/execution processing group to determine the faulty equipment after power retransmission. , In parallel with the execution of the power supply retransmission procedure creation/execution processing group, a system restoration command procedure is created for cases in which the determined faulty equipment remains the faulty equipment even after the power supply retransmission, and cases in which the faulty equipment is not the faulty facility. When a power transmission line accident occurs, execute the accident recovery logic/grid restoration command procedure creation processing group, and upon completion of the grid restoration command procedure creation, execute the power retransmission procedure creation/execution processing group and perform the above operations according to the results obtained. 1. A power system accident recovery operation method, comprising selecting a system recovery command procedure and executing the system restoration command.