JP2666991B2 - Accident recovery system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention relates to an accident recovery system for quickly and efficiently creating a recovery procedure according to a system status.

(Prior Art) As an electric power system becomes complicated and huge, once an accident occurs, the operation for restoration thereof becomes complicated, and the time required for restoration becomes longer.

Currently, automation of recovery operations has been gradually introduced for power failures in the secondary and distribution systems.
On the other hand, for accidents in the backbone system, manual recovery by operators has been performed. In this method, a recovery procedure is prepared in advance for some assumed accidents, and when a power failure occurs, recovery is performed at the discretion of the operator according to this procedure.

(Problems to be Solved by the Invention) In the above-mentioned conventional method, since the restoration pattern differs depending on the system operation status and the load status before and after the accident, the amount of judgment by the operator increases, which is not very preferable. In order to avoid this, a proposal has already been made (Japanese Patent Application No. 62-152730) to support the creation of a recovery procedure using a knowledge engineering technique based on an operation rule based on the system status immediately after the accident.

In the case of this proposal, even if there was a similar accident in the past, the procedure was created from a completely blank state without referring to the recovery procedure. Therefore, it is not a good idea in terms of the time required for creating the procedure.

In this way, the recovery procedure is stored for each accident case,
In order to efficiently obtain an optimal recovery procedure based on a recovery procedure in a similar accident case, it is important to store a large number of accident cases and their recovery procedures.

However, since the number of past accident cases is not so large, and the system is changing regardless of whether it is equipment or operation, recovery procedures may be different even for the same accident case. For this reason, it is necessary that the storage means for storing the recovery procedure be sufficient and constantly updated.

The present invention has been made in view of the above circumstances, and refers to a stored accident case and a recovery procedure, creates an optimal recovery procedure corresponding to the accident, and stores a recovery procedure stored using the procedure. The purpose is to provide a more efficient accident recovery system by enhancing the procedures.

[Structure of the Invention] (Means for Solving the Problems) A structure for achieving the above object will be described with reference to FIG. 1 corresponding to the embodiment. In an accident recovery system that takes in information and outputs a recovery procedure for the system fault condition, information on the faulty equipment of the power system, connection status inside the system after the fault for power failure in the power system, and other system information And a second storage means 32 for storing various accident cases and recovery procedures for the accidents.
And a first calculating means 33 for selecting the most similar accident cases among the accident cases stored in advance in the second storage means based on the accident information inputted to the first storage means. Based on the recovery procedure for the accident case described above, and based on the system information immediately after the accident, a second computing means 34 for creating an optimal restoration procedure, and a restoration procedure created by the second computing means as a second Third calculating means 35 for inputting to the storage means for storing and updating the recovery procedure corresponding to the accident case;
And an output device 4 for outputting the calculation result.

(Operation) In the above system, a recovery procedure can be efficiently created by selecting a recovery procedure for an accident case similar to the input accident situation, setting the procedure to the initial state, and modifying the recovery procedure. At the same time, by using this recovery procedure to enhance and update the contents of the storage means that stores the accident case and its recovery procedure, the recovery procedure can be modified using a similar recovery procedure thereafter. Therefore, an efficient recovery procedure can be created.

(Example) Hereinafter, an example is described with reference to drawings.

FIG. 1 is a configuration diagram of an embodiment of an accident recovery system according to the present invention.

In FIG. 1, reference numeral 1 denotes a target power system, 2 denotes an input device that takes in system information from the power system 1, and 3 denotes an operation that will be described later in detail based on information taken in by the input device 2. The digital computer 4 is an output device from the digital computer, and is, for example, a CRT display device.

The digital computer 3 includes a storage unit 31 for storing system status before and after the accident, a storage unit 32 for storing various accident cases and their recovery procedures, and a system after the accident stored in the storage unit 31. An operation means 33 for selecting the most similar accident case from the storage means 32 based on the state and an algorithm described later, and an operation means 34 for creating and correcting a recovery procedure.
And an operation means 35 for classifying the restoration procedure into patterns and inputting the pattern to the storage means 32.

FIG. 2 is a flowchart showing the operation as a whole.

First, a power failure occurs in the power system 1 (step S2).
0), When an accident equipment is judged by an accident judgment unit (not shown), and when the equipment that cannot be used is fixed, the information to that effect is input to the digital computer 3 via the input device 2 and restoration is performed. Planning begins. The storage unit 31 stores the information on the unusable facilities, the operational facilities before and after the accident, the magnitude of the load, the output of the power plant, and the like. In step S21, using the stored information (of the storage means 31), the arithmetic means 33 performs collation with various accident cases stored in the storage means 32. In step S22, it is determined whether or not there is a similar accident, and if there is a similar accident, the process proceeds to step S23, where the restoration procedure of the similar accident is corrected. This is because even if the accident equipment or unusable equipment is the same, the restoration procedure may be completely different depending on the supply and demand conditions at the time of the accident.For example, during peak hours and off-peak hours,
Even if the accident equipment is the same, the recovery procedure is different (described later). As described above, even if all the supply and demand recovery procedures are stored, the accident of the equipment does not always correspond to the state. Therefore, in the present embodiment, the classification is made in the following pattern based on the examination of various accident cases so far.

Accident or unusable transmission and transformation equipment (including work stoppage equipment).

Supply and demand cross section, specifically peak hours, intermediate hours,
Off-peak hours.

 Power generation facilities that cannot be used in the event of an accident.

In an accident case where the above three conditions are met, the recovery procedure is almost the same. If all three conditions are not met, select an accident case that matches in the order of ,,. Here, if there is a very similar accident case that satisfies all of the conditions (1) and (2), the recovery procedure performed in step S23 needs to be slightly modified, which is efficient. From this point as well, it is desirable that the data in the storage means 32 be substantial. In step S23, the restoration procedure is modified, and in step 24, the restoration procedure of the accident pattern is updated to the modified restoration procedure. If it is determined in step S22 that there is no similar accident, the process proceeds to step S25, and a recovery plan is created from a blank state without considering an accident case in the storage unit. The recovery procedure thus obtained is in step S2
In 6, the pattern is newly registered in the storage means.

In any case, the recovery procedure selected from the storage means 32 is corrected by the arithmetic means 34, and a recovery procedure more suitable for an accident case is created. In this case, the efficiency is better than creating a recovery procedure from the beginning with the state immediately after the accident as the initial state. This restoration procedure is output to the output device 4.

On the other hand, the created restoration procedure is classified into each of the above-mentioned patterns by the arithmetic means 35, and the accident case and the restoration procedure are stored in the storage means 32. In this case, if the same accident pattern does not exist in the storage means 32, the restoration procedure is stored as it is to enhance the contents of the storage means 32. If the same accident pattern exists, the existing recovery procedure is discarded, the newly obtained dissemination procedure is stored, and the content is updated.

The above is the operation as a whole. A method of creating a recovery procedure will be described with reference to FIG. The basic idea in this case is to consider whether or not the recovery procedure selected by the arithmetic means 33 can be performed and whether or not the accident can be completely recovered (step S31). If it can be completely recovered, it is examined whether or not each recovery operation for that can be executed (step S3).
3). If feasible, past recovery procedures would have to be implemented for this accident case. For example, if there is an operation that cannot be performed due to a temporary overload, a measure is considered so that the operation that cannot be performed can be performed by the arithmetic unit 34 (step S34). In the case of a temporary overload, it is conceivable as one method to perform an unexecutable operation at an early stage when a tide is not flowing much.

 Examples of knowledge are listed below.

“Creation and modification of restoration procedure” section If there is a power outage load that cannot be restored, it will be temporarily restored from the substation that received power before the accident.

If an overload occurs, consider eliminating it by system operations such as power generation adjustment, system switching, and bus separation.

If the overload cannot be eliminated by any operation, the restoration of the load downstream of the overload facility will be partially explained.

About "Countermeasures" section If an overvoltage is expected to occur when charging the transmission line, add phase-modulating equipment.

When charging the transmission line, if the deviation of the operating capability of the power supply is expected, the charging operation is delayed.

If a transient overload occurs due to the loop switching operation, the load recovery order is changed.

Using such knowledge to create an optimal recovery procedure, if the recovery procedure is not feasible, do not consider past recovery procedures at all, and make a recovery plan from the beginning with the state immediately after the accident as the initial state. It will be reestablished (step S35). In such a case, a recovery plan is made after an extra procedure, so that the efficiency is worsened, but the number of study steps can be sufficiently reduced by a method of classifying patterns of past accident cases.

In short, if there is any remaining restoration by the restoration procedure selected by the calculation means 33, the system configuration after executing all the restoration procedures is set as the initial state, and the operation of the system so that there is no remaining restoration is examined by the calculation means 34. do it. That is, it is far more efficient than making a recovery plan from the beginning with the state immediately after the accident as the initial state. As described above, whether or not there is a recovery remaining is checked as to whether or not each recovery operation can be performed, and if there is an operation that cannot be performed,
We are studying the measures.

In the above-described embodiment, the description has been made that the system is used when an accident occurs in the system.However, the present invention is not limited to this. It is more desirable to be fulfilled and updated. Furthermore, the classification of accident cases is not limited to the above description, and can be arbitrarily considered.

[Effects of the Invention] As described above, according to the present invention, the system status at the time of occurrence of an accident is fetched, and it is examined whether there is a similar accident case in the accident information stored in advance, and Based on the recovery procedure for the accident case similar to the accident situation that occurred in the above, the procedure was modified to the optimal procedure based on the actual accident, and the obtained procedure was used to classify according to the accident case and then stored in the storage means Since the contents are input and the contents of the storage means are enriched and updated, an accident recovery system capable of efficiently creating an optimum recovery plan can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of an accident recovery system according to the present invention, FIG. 2 is a flowchart showing the operation of the entire system, and FIG. 3 is a flowchart of creating a recovery procedure. DESCRIPTION OF SYMBOLS 1 ... Power system, 2 ... Input device 3 ... Digital computer, 4 ... Output device 31,32 ... Storage means, 33 ... Calculation means 34,35 ... Storage means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiichi Kato 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Naka Plant (56) References JP-A-63-242132 (JP, A) JP-A-54- 53234 (JP, A) Actually open sho 59-108944 (JP, U)

Claims (1)

(57) [Claims] In an accident recovery system, which takes in accident information from a power system at the time of a system fault and outputs a recovery procedure for the system fault state, information on accident facilities of the power system and power failure in the power system are provided. First storage means for storing the connection state inside the system after the accident and other system information, second storage means for storing various accident cases and recovery means for the accident, and the first storage means Based on the accident information input to the first arithmetic means for selecting the most similar one of the accident cases stored in advance in the second storage means based on the accident information input to the second storage means, and a recovery procedure for similar accident cases, A second computing means for creating an optimal restoration means in consideration of the system information immediately after the accident, and a restoration procedure created by the second computing means inputted to the second storage means to respond to the accident case Restoration system characterized by a third computing means for the recovery procedure is stored and updated, and an output device for outputting the operation result that.