JPS63316622A - Device for formation of power system recovery plan - Google Patents

Abstract

PURPOSE:To obtain a device for forming safe and reliable recovery plan corresponding to system condition, by judging a possibly faulty facility upon occurrence of fault then forming a recovery plan sequentially in the order of less possible faulty facility. CONSTITUTION:Information of a power system 1 is taken into an input device 2 so as to judge a power interruption zone through a power interruption zone judging means 5 based on operational information of relay or circuit breaker. A possibly faulty facility is judged through a faulty facility judging means 7 based on same information and the possibility of fault is calculated. Threshold of operational condition of the power system 1 obtained based on the system information is stored in a storage device 9. An arithmetic unit 10 prepares a recovery plan at first without employing the possibly faulty facility at all, and if the plan can not be prepared, facilities having operational condition lower than the threshold stored in the storage device 9 are employed in the order of increasing possibility so as to prepare a recovery plan.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention is a relay that is installed in the event of a power system accident.

The present invention relates to a power system restoration plan creation device that creates a safe and reliable power system restoration plan based on circuit breaker operation information.

(Prior Art) As electric power systems become more complex and enlarged, once a power outage occurs, operations for restoration become complicated and the time required for restoration becomes longer.

By the way, restoration of a load that has experienced a power outage due to an accident in the power system can be divided into two stages: determining the equipment in question and creating a restoration plan. In other words, the faulty equipment is determined based on information from relays and circuit breakers that were activated due to an accident in the power system, and then a recovery plan is created to restore the power outage without using the faulty equipment, and the system is operated. It is to do.

Conventionally, operators have determined which equipment has been involved in an accident based on information about activated relays and circuit breakers, and when it comes to creating recovery plans, recovery plans have been created in advance for hypothetical accidents. When this happens, operators make decisions based on this plan.

However, if operators make decisions based on faulty equipment and recovery plans, the system becomes complicated and there is a risk that faulty equipment may be overlooked in emergency situations. Mistakes may also occur during creation.

(Problem to be solved by the invention) Therefore, various attempts are currently being made to automate the determination of accidental equipment and the creation of recovery plans.In particular, methods using knowledge engineering and methods that apply probability are used to determine accidental equipment. If these methods are introduced, it is possible to indicate the candidates for the accident equipment using probability. In addition, there are methods for creating a recovery plan, such as a method based on a combination of recovery patterns and a method using knowledge engineering.

By the way, determining the equipment involved in an accident is an important factor for creating a recovery plan. For example, now A and B are candidates for the accident equipment.
, 95% probability that there are three C.

Let's consider the case where it is calculated as 4.9% and 0.1%.

Although it can be said from this result that A is probably the accidental equipment, there is a problem in creating a recovery plan based on this fact alone assuming that B and C are not the accidental equipment. Particularly in the case of target systems or core systems, even though the probability is low, if the equipment in question were to be used for restoration, it could cause a serious accident. Therefore, equipment that is likely to have been damaged should not be used for recovery, no matter how low the probability.

On the contrary, Relaysis 1 is like a secondary system! −
and 2' -be [If the main system is not fully equipped, there may be many accident candidate facilities, but as with the main system, all of these accident candidate facilities are not used. It is impossible to restore the system, and even if the accident equipment were to be used for restoration, it would not cause a serious accident in the case of the main system.

Therefore, when preparing a recovery plan, it is extremely important to deal with accident candidate equipment.

Therefore, in automating the determination of faulty equipment and the creation of recovery plans, the present invention creates a safe and reliable recovery plan according to the system situation based on the operation information of relays and circuit breakers that is acquired at the time of an accident in the power system. The purpose of the present invention is to provide a power system restoration plan creation device that can perform the following tasks.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an input device for receiving system information including information on relays and circuit breakers that operate in the event of an accident in the power system; a power outage area determining means for determining a power outage area based on operating information of relays and circuit breakers taken into the input device; a power outage area storage device for storing a result determined by the power outage area determination means; Based on the operation information of the relays and circuit breakers taken into the input device, the accident candidate equipment is determined by taking into account the possibility of malfunctions, malfunctions, multiple accidents, blind spot accidents, etc. of the relays and circuit breakers. and an accidental equipment determination means for determining the probability of an accident; an accidental equipment storage device that stores the result determined by the accidental equipment determination means; and an operation of the electric power system grasped from the system information taken in by the input device. A threshold storage device stores thresholds predetermined according to the situation and load conditions, and data stored in the power outage area storage device, accident equipment storage device, and threshold storage device is inputted to store the possibility of an accident. A first means of creating a recovery plan using only sound equipment excluding equipment with faulty conditions, and a probability that the power outage equipment is an accidental equipment if it is impossible to restore the power outage equipment by this first means is stored in the threshold storage device. a recovery plan creation means having a second means for selecting equipment with a lower probability than the stored threshold value and creating a restoration plan by sequentially using these equipment in descending order of probability of being an accident equipment; It is characterized by

(Function) Therefore, in the power system restoration plan creation device with such a configuration, when information on relays and circuit breakers that operate in the event of an accident in the power system is input, the power outage area can be determined based on that information. At the same time, fault candidate equipment is determined in consideration of the possibility of accident types such as malfunction or non-operation of the relays and circuit breakers, multiple 1 failures, blind spot accidents, etc.

Then, based on the probability that the equipment is the accident equipment, a recovery plan is first created without using any of these accident candidate equipment, and if it is impossible to create a recovery plan, the probability that the equipment is the accident equipment is calculated. Safe and reliable recovery can be achieved by selecting equipment that is below a predetermined threshold value according to the operating status and load status of the power system and creating a recovery plan using them in order of decreasing probability that they are accidental equipment. It becomes possible to create a plan.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of a power system restoration plan creation device according to the present invention.

In Fig. 1, 1 is the target power system, 2 is a human-powered device that takes in system information including operation information of relays and circuit breakers in the event of an accident in this power system 1, and 3 is the input device 2. A digital computer processes operation information of relays and circuit breakers to determine accidental equipment and create a recovery plan, which will be described in detail later. 4 is an output device that outputs recovery plan data created by this digital computer.

The digital computer 3 includes a power outage area calculation device 5 which processes operation information of relays and circuit breakers taken into the human power device 2 to determine a power outage area;
a power outage area storage device 6 that stores the determination results obtained from the
Operation information of relays and circuit breakers taken into the human-powered device 2 can be used to detect malfunctions, malfunctions, and multiple accidents of relays and circuit breakers.
An accident equipment calculation device 7 that performs calculations taking into consideration the possibility of accident situations such as blind spot accidents and obtains accident candidate equipment and the probability of the accident, and an accident equipment storage that stores the results obtained by the accident equipment calculation device 7. A device 8, a threshold storage device 9 that stores thresholds determined in advance according to the operational status and load status ascertained from the system information of the electric power system 1, a power outage area storage device 6, an accident equipment storage device 8, and A first calculation unit that processes the stored data respectively input from the threshold storage device 9 and creates a recovery plan using only sound equipment excluding equipment with a possibility of an accident, and this first calculation unit If it is impossible to restore the power outage equipment according to the recovery plan created in It is comprised of a recovery plan creation calculation device 10 having a second calculation unit that creates a recovery plan using equipment in descending order of probability.

Here, there are various methods for calculating accident candidate equipment and their accident probabilities in the accident equipment calculation device 7, but in this embodiment, for example, the method shown in Japanese Patent Application Laid-Open No. 60-28722, that is, A method is adopted in which the relationship between power outage sections is determined according to the protection area of the relay, and the probability that the equipment is an accident candidate or equipment is determined by taking into account the probability of malfunction of the relay. In addition, in the recovery plan creation calculation device 10, the recovery plan creation methods include a method using simulation, a method using mathematical planning (OR),
There are methods that apply knowledge engineering, but in this example, the IEEJ Journal Vol. 1.93-B, No. 8. P323~3
30, which is based on simulating operations actually performed in real systems using digital cost simulations and making decisions through trial and error.

Next, the operation of the power system restoration plan creation device configured as described above will be described.

Now, when a power outage accident occurs in the power system, operating information of relays and circuit breakers corresponding to the power outage section is input to the digital computer Z via the input device 2. First, the power outage area calculating device 5 processes operation information of relays and circuit breakers to determine the power outage area and the power outage load therein, and stores the determination result in the power outage area storage device 6. In addition, the accident equipment calculation unit 7 uses relay and breaker operation information to detect relay and breaker malfunctions, malfunctions, and multiplex 11
Therefore, calculations are performed taking into account the possibility of accident situations such as blind spot accidents, and the accident candidate equipment and its accident probability are determined and the results are stored in the accident equipment storage device 8. Furthermore, in the recovery plan creation calculation device 10, the power outage area and the power outage load stored in the power outage area storage device 6, the accident candidate equipment stored in the accident equipment storage device 8, the probability that the equipment is an accident equipment, and the threshold are calculated. A recovery plan is created using the threshold values stored in the value storage device 9.

Here, a method of creating a recovery plan created by the recovery plan creation arithmetic device 10 will be explained with reference to the flowchart shown in FIG. First, the first calculation unit creates a recovery plan using only sound equipment, excluding all accident candidate equipment, and examines each of them. For example, it is examined whether all the power outage loads can be restored under the condition that the two overload frequencies do not deviate from the specified range, and if restoration is possible, that restoration plan is adopted. If the result of the analysis created and examined by the first calculation unit is that it is impossible to restore the power outage equipment, the second calculation unit predetermines the probability that the equipment is the one that has failed among the accident candidate equipment. Check for the presence of equipment that is smaller than the threshold. If there is no equipment smaller than the threshold, the creation of the recovery plan ends without being able to restore all the power outage loads. Furthermore, if there is a facility among the accident candidate facilities whose probability of being an accident is smaller than a threshold value, a recovery plan is considered using the facility with the lowest probability of being an accident facility. Then, in the same way as the above-mentioned consideration in the first calculation unit, it is examined whether all the power outage loads can be restored, and if it is possible to restore them, that restoration plan is adopted. If recovery is not possible, consider a recovery plan using equipment that is smaller than the threshold and has a lower probability of being an accident equipment,
If recovery is possible, adopt that recovery plan.

Here, the threshold value can be determined as follows.

(1) If the accident occurs in the main system, set the threshold to 0.
shall be. In other words, equipment that is likely to cause an accident will not be used at all for recovery.

(2) If the accident occurs in the secondary system, set the threshold value to a slightly larger value, for example 3%.

(3) If an accident occurs in the same area, the threshold value used for heavy loads is set to a smaller value than the threshold value used for light loads. This is because if the accidental equipment were to be used for restoration, there is a higher possibility that serious consequences would result if the equipment was under heavy load.

[Effects of the Invention] As described above-1-, the present invention provides an input device that takes in grid information including information on relays and circuit breakers that operate in the event of an accident in a power system, and information that is taken into this input device. a power outage area determining means for determining a power outage area based on operation information of relays and circuit breakers; a power outage area storage device for storing results determined by the power outage area determination means; Malfunctions, malfunctions, and multiple accidents of the relays and circuit breakers are determined based on the operation information of the relays and circuit breakers.

Accidental equipment determining means for determining an accident candidate equipment and determining the probability of an accident in consideration of the possibility of an accident situation such as a blind spot accident; and an accidental equipment storage device for storing the results determined by the accidental equipment determining means; a threshold storage device that stores a threshold value determined in advance according to the operational status and load status of the electric power system ascertained from the system information taken in by the input device; the power outage area storage device; and the accident equipment. A first means for creating a recovery plan using only sound equipment excluding equipment with a possibility of an accident, in which data stored in a storage device and a threshold storage device are respectively input;
If it is not possible to restore the power outage equipment by the means described above, select the equipment whose probability of being an accidental equipment is lower than the threshold value stored in the threshold storage device, and calculate the probability that the equipment is an accidental equipment from among these equipment. Since the configuration is equipped with a recovery plan creation means having a second means for creating a recovery plan by sequentially using the highest to lowest power, the recovery plan is created based on the operating information of relays and circuit breakers that is taken in at the time of an accident in the power system. It is possible to provide an electric power system restoration plan creation device that can create a safe and reliable restoration plan according to the system situation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the power system restoration plan creation device according to the present invention, and FIG. 2 is a flowchart for explaining the operation of the embodiment. 1...Power system, 2...Input device, 3...
... Digital computer, 4 ... Output device, 5 ... Outage area calculation device, 6 ... Outage area storage device, 7 ... Accident Equipment calculation device, 8
. . . Accident equipment storage device, 9 . . . Threshold storage device, 10 . . . Recovery plan creation calculation device. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] An input device that captures system information including information on relays and circuit breakers that operate during power system accidents, and a power outage system that determines power outage areas based on the operating information of relays and circuit breakers captured in this input device. an area determining means; a power outage area storage device for storing the results determined by the power outage area determining means;
Based on the operation information of the relays and circuit breakers input into the input device, the accident candidate equipment is determined in consideration of the possibility of malfunctions, malfunctions, multiple accidents, blind spot accidents, etc. of the relays and circuit breakers. An accident equipment determination means for determining the probability of a determination and the accident; an accident equipment storage device for storing the results determined by the accident equipment determination means; and an operation of the electric power system ascertained from the system information taken in by the input device. A threshold storage device stores thresholds predetermined according to the situation and load conditions, and data stored in the power outage area storage device, accident equipment storage device, and threshold storage device is inputted to store the possibility of an accident. A first means of creating a recovery plan using only sound equipment excluding equipment with faults, and a probability that the power outage equipment is an accidental equipment when it is impossible to restore the power outage equipment by this first means is stored in the threshold storage device. and a recovery plan creation means having a second means for selecting equipment with a lower probability than the stored threshold value and creating a restoration plan by sequentially using these equipment in descending order of probability of being an accident equipment. A power system restoration plan creation device characterized by: