JPH0471330A - Power supply system accident recovery supporting system - Google Patents

Abstract

PURPOSE:To improve reliability of verification by forming a recovery procedure at each condition before and after alteration when recovery procedure forming knowledge or power system facility data is altered, automatically comparing both to verify many similar accidents. CONSTITUTION:A computer 15 has power system data storage means 4, recovering procedure forming knowledge storage means 5, block dividing means 6 for forming recovery procedure from power system data and recovery procedure forming knowledge, charging route forming means 7, power system simulating accident setting means 11 for setting similar fault of a power system 1, recovery procedure forming knowledge altering means 12 for altering recovery procedure forming knowledge, etc. When recovery procedure forming knowledge such as alteration of recovering method, etc., is altered, recovery procedure is formed by using power system facility data and knowledge stored in the means 5 before and after the alteration, both are compared to display a difference of a predetermined value or more.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to an electric power system that inputs system information into a computer when an accident occurs in an electric power system, and assists operators in recovering from the accident. Regarding accident recovery support equipment.

(Prior Art) When equipment that makes up a power system, such as a power transmission line or a transformer, stops due to an accident, customers who use those equipment to receive electricity will experience a power outage.

In order to save consumers from a power outage, a method is generally used to send power from another healthy system, and this is called accident recovery. This accident restoration operation restores power to power outage customers in a system state different from normal without using the equipment where the accident occurred (hereinafter referred to as accident equipment).

We carefully examine the balance between power supply and load, the capacity of power transmission lines and transformers, the installation status of protective relays (hereinafter referred to as RV), and confirm that there are no problems before proceeding with accident recovery operations. It is necessary to do this.

Furthermore, power system accidents have a large social impact, and recovery operations require speed and accuracy. Therefore, accident recovery operations require extremely advanced knowledge and technology.

Conventionally, this type of operation was normally performed by a skilled operator.

(Problem to be solved by the invention) In contrast to the above-mentioned conventional technology, a system applying knowledge engineering has recently been put into practical use with the aim of automating the creation of procedures for accident recovery operations using computers, and verification of processing methods has been carried out. A means to do so has become essential.

The present invention has been made in view of the above circumstances, and provides an electric power system in which the validity of the knowledge of the operation procedure is evaluated from the viewpoint of power system operation when outputting the operation procedure of the electric power system at the time of recovery from an accident. The purpose is to provide accident recovery support equipment.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a power system data storage means for collecting and storing power system information via an information transmission device, and a power system data storage means for collecting and storing power system information via an information transmission device. a power system simulation accident setting means for setting a power system accident, a recovery procedure creation knowledge storage means for storing knowledge regarding restoration of a power system accident, a recovery procedure creation knowledge changing means for changing the restoration procedure creation knowledge, and a power system data storage means. a recovery procedure creation means for creating a recovery procedure by applying knowledge in the recovery procedure creation knowledge storage means to data in the means; a recovery procedure storage means for storing a plurality of the created recovery procedures; and storage in the recovery procedure storage means. The present invention is comprised of a recovery procedure evaluation means for extracting the two restored recovery procedures and performing a predetermined evaluation, and a CRT device for displaying the data created by the recovery procedure evaluation means.

(Function) When the recovery procedure creation knowledge is changed due to a change in the recovery method, etc., each recovery procedure is created using the power system equipment data and the knowledge stored in the recovery procedure creation knowledge storage unit before and after the change. , compare the two, and display those with a difference greater than a predetermined value.

(Example) Examples will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of an embodiment of the power system accident recovery support device according to the present invention.

In Figure 1, 1 is the power system, 2.3 is the power system 1
2 is an upstream transmitting station from the power system 1 to the electronic computer 15, and 3 is an upstream receiving station.

15 is a transmitting station 2. an electronic computer 1 that creates a recovery procedure based on the status of the power system 1 obtained through the upstream receiving station 3;
Reference numeral 4 denotes a CRT device that displays the recovery procedure created by the computer 15 and the evaluation results of the recovery procedure, which will be described later.

The computer 15 also includes a power system data storage means 4 for storing data fetched from the uplink receiving station 3, a recovery procedure creation knowledge storage means 5 for storing knowledge regarding restoration of power system accidents, and a power system data storage means 5 for storing knowledge regarding restoration of power system accidents. The details for creating a recovery procedure from . A charging route modification means 8, a recovery procedure creation means 9, a recovery procedure storage means 13 for storing two created recovery procedures, and a recovery procedure stored in the recovery procedure storage means 13 are retrieved and evaluated based on predetermined evaluation criteria. evaluation means 10 for recovery procedures to be performed; and power system simulated accident setting means 11 for setting a simulated power system accident.
and a recovery procedure creation knowledge storage means for changing the recovery procedure creation knowledge.

The functions of each component listed above will be explained below. First, Figure 2 shows the power system to be considered.

In FIG. 2, G#1 to G#3 indicate generators, and these constitute a power system as shown. Here, A to F, I, I, N, P.

Q is the electric station or load, J and M are the consumers or loads, 1
1 to 117 indicate power transmission lines. In Figure 2, the equipment involved in the accident is transmission line No. 2.

FIG. 3 shows a storage example of the power system data storage H4, and in particular, FIG.
1)) does not show an example of storing a generator, and Fig. 3 (C) does not show an example of storing a power transmission line.

In Fig. 3(a), power system data 1 is the equipment name, A
, -88 (substation), equipment type is electric station, load,
It is shown that the impact of the accident is healthy, and therefore both the pre-accident power demand and the current power are 250 [HW]. Also, as connection information, generator G#1 was OFF before the accident.
N (connected) transmission lines 11 and 12 were connected, but after the accident, generator G#1 was ON and transmission line 11 was connected, but transmission line J! , 2 indicates that it has become 0FF (Ll is disconnected). Power system data 2.3 can be understood in the same way, so the explanation will be omitted.

In Fig. 3(b), power system data 4 is the equipment name, G
In #1, the type of equipment is a generator, and the impact of the accident is healthy.The rated capacity is 700 [HW], but the current output is 560 [HW], and the connection information is that it is a generator before and after the accident. Indicates that A is ON (connected). The power system data 56 can be understood in the same way, so the explanation will be omitted.

In Figure 3 (C), power system data 7 is equipment name blade 2.
The type of equipment is a power transmission line, the impact of the accident is due to an accident, and the rated capacity is 1000 [MW].
, which indicates that it was connected to electric stations A and C before the accident, and was cut off from electric stations A and C after the accident. Since the power system data 8, 9, and 10 can be similarly understood, their explanation will be omitted.

Next, the block dividing means will be explained.

Figure 4 is a system diagram of the healthy system and equipment affected by the accident.It was created independently of Figure 2 to facilitate understanding, and is used to explain the blocks. In FIG. 4, A to F are blocks, and a healthy system is a part where there was no power outage due to an accident. In addition, the symbols I to I in the diagram indicate the equipment, and in particular, I, Ha, Po, 1, Nu, Wo, Power, Yu is the J8 line, Mou, He, Chi, Wa, Wa, Yo, Shi. is a power line,
Nir indicates a bank (transformer). Also, G1 is a generator, L
1 and L2 are loads, ■ to ■ indicate that the switching equipment has been cut off (hereinafter referred to as CB disconnected), and others indicate that the switching equipment is connected (hereinafter not referred to as C8 people).

The blocks shown in FIG. 4(a) can be expressed in units of equipment as shown in FIG. 4(b), and furthermore, they can be expressed in units of blocks.

As shown in FIG. 4 fa), the power outage system can be divided into subsystems using the CB cutoff position as a boundary. This is called a block. Then, the block dividing means 6 uses the knowledge stored in the recovery procedure creation knowledge storage means 5 to divide the power outage system into C.
At the B cut position, the partial system, that is, the block C- is stored in the power system data storage means 4.

For example, it is stored as shown in FIGS. 5(a) and 5(b). The features here are as follows.

■ Perform a list I/up of the equipment included in the block.

(2) Restore the opening/closing configuration a between each block (hereinafter referred to as interconnection point) and restore the adjacent blocks at the interconnection point.

■ Since both the stopped generator and the power outage load are included in the component equipment of the block, it is necessary to search within the block to target the generator and load individually. To avoid this, an index is provided as shown in FIG. 5(b) to correspond to the block to which it belongs.

FIG. 5(a) is a diagram showing how the divided blocks are stored. As shown in the figure, the equipment and interconnection points included in each block are shown. That is, as for block A, the equipment included inside it is the power transmission line entrance, the bus bar A, the 2nd port, and the transformer 2, and the interconnection points are CB■ and the healthy system, CB■ and block ■,
CB ■ and block ◎ indicate that they are connected respectively. This also applies to block B, so a detailed explanation will be omitted.

Figure 5(b) shows the loads L1, L2,...G
The name of the belonging block corresponding to 1 is stored. That is, the load L1 belongs to the block B, the load L2 belongs to the block E, and the generator G1 belongs to the block F.

FIG. 6 is a diagram illustrating how to create a charging route by the charging route creation means 7. Here, the knowledge stored in the recovery procedure creation knowledge storage means 5 and the power system data storage means 4 are explained.
A charging route is created using the blocks stored in the block, and is stored in the power system data storage means 4. The charging route will be created based on the following items.

■ Detour around the accident equipment.

■ Prioritize routes that were electrically connected before the failure ■ Prioritize routes with higher voltage class ■ Prioritize routes with fewer interconnection points Here, the accident equipment is located at G1.

This shows the case where G2 is stopped. That is, as a detour charging route (hereinafter simply referred to as charging route) for the faulty equipment for the stopped generator G1, the healthy system → Po → 2 → Kuchi → Ha →
G1 is searched, and generator G2 is also found to be a healthy system →
H → 2 → RO → H → I → G2 is searched. The charging route obtained in this way is saved in the form shown in FIG.

In short, the format is (target generator, load: block name on recovery route (route order)), and the recovery route for stopped generators and power outage loads is saved.

FIG. 8 is a diagram illustrating how the charging route correction means 8 corrects the charging route evaluated from the entire system.

The basic idea here is as follows.

The power flow of the grid obtained by the charging route created by the charging route creation means 7 is calculated, and if one load is overworked, the knowledge stored in the recovery procedure creation knowledge storage means 5 and the power system data storage means 4 are calculated. The overload is eliminated using the stored blocks, the charging route is corrected, and the data is stored in the power system data storage means 4 again.

The system obtained by the revised charging route is not shown to the operator using the CRT device 14.

When considering the system shown in FIG. 8, a route from the healthy system to A-B-D-G for the stopped generator G can be considered. However, if this route is taken, overload may occur in the equipment shown with diagonal lines. In this case, by reconsidering the charging route in block D and choosing another interconnection point, healthy system → C-+D
- Get the root of +G. In this way, the charging route is corrected and the corrected charging route I. is stored again.

As is clear from the above description, the power system data storage means 4 stores data from the power system inputted from the power system 1 via the information transmission device, and the block dividing means 6. Each data of charging route creation means 7 and charging route modification means 8 is stored.

The recovery procedure creation means 9 uses the knowledge stored in the recovery procedure creation knowledge storage means 5 to create a recovery procedure from the charging route corrected by the charging route correction means 8, and stores the recovery procedure storage means 1.
3 and displayed on the CRT device 14.

The power system simulated accident setting means 11 is shown in Fig. 3 (aL (bL
After arbitrarily changing and setting all the data except for the rated capacity among the data shown in (C), block dividing means 6, charging route creating means 7. Charging route correction means 8, recovery procedure creation means 9
is operated, and the recovery procedure created as described above is stored in the recovery procedure storage means 13.

The recovery procedure creation knowledge changing means 12 is a means for arbitrarily changing the knowledge stored in the recovery procedure creation knowledge storage means 5 (for example, the knowledge shown in FIGS. 9 to 12).

Next, I will explain the effect.

FIG. 13 is a flowchart of the entire process.

First, in step S1, the post-accident system is divided into blocks. In this case, blocks are determined as shown in FIGS. 4(a) and 4(b), and the post-accident system is divided into blocks using the knowledge stored in the recovery procedure creation knowledge storage means 5.

For example, in the case of the system shown in FIG. 4(a), attention is paid to the CB cutting position and the system is divided into blocks ① to ②. This is shown in Figure 5(a).
The data is stored in the power system data storage means 4 in the form shown in FIG.

Furthermore, in order to search for a charging route, an index is provided for each of the power outage loads and stopped generators as shown in FIG. 5(b). Although detailed explanation will be given later in step S2,
Create a charging route.

For loads that have lost power due to an accident and generators that have stopped, as shown in Figure 6, a charging route from a healthy system that did not experience a power outage, bypassing the accident equipment, is stored in the recovery procedure creation knowledge storage means 5. Create it using the knowledge you have.

In step S3, the charging route created in step S2 is modified (details will be described later). In step S4, a recovery operation command procedure is created from the charging route (details will be described later). In step S5, the recovery operation command procedure created in step S4 is stored in the recovery procedure storage means 13, and the CRT
Output it to the device and show it to the operator.

Step S6 is a step that operates when the recovery procedure creation knowledge changing means 12 is operated.

First, for example, knowledge is set as shown in FIGS. 9 to 12 by the recovery procedure creation knowledge changing means 12, and step 81.
S2.33. S4.35 is executed and one recovery procedure is stored in the recovery procedure storage means 13.

Next, for example, the knowledge in FIG. 11 is changed to the underlined part in FIG. 12, and the step S1. S2.83. S
/IS5 and stores one more recovery procedure (two in total) in the recovery procedure storage means 13.

FIG. 14 shows a situation where blocks A, B, C, D, E, F, and H are out of power due to an accident in the power transmission line L1.

FIGS. 15(a) and 15(b) show the recovery procedures obtained before and after the knowledge change, respectively.

FIG. 15(a) shows the result of creating a charging route in step S3 of FIG. 13 using the knowledge in FIG. The obtained recovery procedure indicates that a supply failure 100HI11 has occurred in block H.

Also, FIG. 15(b) shows the result of creating a charging route using the knowledge in FIG. 12 in step S3 of FIG.
Figure 15 (a) was obtained without modifying the charging route.
) indicates that there is no supply disruption. This is because, based on the knowledge of FIG. 12, it was determined that an excess of the installed capacity of the power transmission line was allowed up to 120%, and that no shortage of installed capacity occurred on the power transmission line L2. In such a case, step S6 treats the difference between the results of the two recovery procedures as the amount of supply disruption, and sets the difference to a predetermined value, for example 10.
When it exceeds MIII, it is output as an alarm. This means that when the power system operation policy is changed and the knowledge for creating recovery procedures is changed accordingly, an alarm will be sent to the power system operators to indicate that the accident recovery procedures are being affected.

FIG. 16 is a flowchart showing details of step 32 (creating a charging route).

First, in step S21, a load with a stopped generator or a power outage is extracted from the power system data storage means 4, and a charging route is searched among them according to a predetermined charging route creation priority order. In this case, select one generator or load.

In step S22, the block containing the generator or load selected in step 821 is checked using the index shown in FIG. 5(b). In step S23, a route from the block obtained in step 822 to the healthy system is obtained as shown in FIG. 6 using the knowledge stored in the recovery procedure creation knowledge storage means 5, and is stored in the power system data storage means 4. do. In step 824, it is checked whether charging routes have been created for all the loads or generators that are out of power and are stopped, and if there are any remaining loads or generators, the process returns to step 321 and the above process is repeated. The process ends when all systems are completed.

FIG. 17 is a flowchart showing details of step 83 (correction of charging route).

In step S31, the load demand of the power station that has experienced a power outage is set. In this case, referring to the contents of the power system data storage means 4 shown in Fig. 3, the current power demand is set as the target power demand for healthy loads that are not affected by the accident, and the target power demand is set as the target power demand for loads that have experienced a power outage due to the accident. The demand power is set as the target power demand. or,
The number of loads that have experienced a power outage due to the accident is counted as the number of power outage loads, and the pre-failure power is added up as the total supply disruption. For example, in A-SS of FIG. 3(a), the influence of the accident is healthy, so the target power demand is 250 [HW] of the current power.

In addition, since the 13-8S has a power outage as a result of the accident, the target power is 220 [HW], which is the power before the accident. In this way, the output shown in FIG. 18(a) is obtained. In addition, the first
The total values shown in Figure 8(a) have no direct relationship with the system diagram in Figure 2. In step S32, the generator output is set to match the load demand. The generator output is increased by an amount commensurate with the total supply disruption determined in step S31, and is set as the target output.

In this case, refer to the contents of the power system data storage means 4 shown in Fig. 3, and select the generators that are not affected by the accident and are healthy, and the generators that are affected by the accident but can output immediately after restoration. Increase the output to the rated capacity in order of priority. In thermal power generation, if there is a device that automatically disconnects the generator from the grid and switches it to isolated operation in the event of a system failure, the generator will be ready to output immediately after the accident is restored. In addition, the number of power outages is calculated by counting the power outages due to the accident.

For example, G#1 in Fig. 3(b) has a healthy influence from the accident, so the current output changes from 560 [HW] to 140 [8
14] and increased the output to a rated capacity of 700 [81
4] is the target output. In addition, G#2 was affected by the accident due to successful isolated operation within the plant, and output could be produced immediately after recovery.
The rated capacity of 500[814] is set as the target output. Furthermore, the target for G#3 is set to O because the effect of the accident is a power outage and it takes a long time from restoration to start of output.

In this way, the output shown in FIG. 18(b) is obtained.

Note that in this case as well, there is no direct relationship with the system diagram in FIG. 2, as described above.

In step S33, a connection system is created in the computer according to the charging route created in step S2. In step 334, the load demand set in step S31 and the generator output set in step S32 are set for the system created in step S33, and power flow calculation is performed. In step S35, it is determined whether there is overloaded equipment based on the power flow calculation result in step 834. If there is an overload here, steps 836 and 337
Then, the overload is eliminated as shown in FIG. 8, which has already been explained, and the recovery system and charging route are corrected. Then, in step 838, the recovery procedure is stored in the recovery procedure storage means 13, and the recovery system is displayed on the CRT device.

FIG. 19 is a flowchart showing details of step 84 (creation of recovery operation command procedure).

In step 841, one of the loads experiencing a power outage and the stopped generator is selected to be restored. In step S42, a list of charging routes as shown in FIG. 7 is picked up from the power system data storage means 4 for the target load or generator in step 841.

Based on the charging route obtained here, the blocks shown in Fig. 5 (a) stored in the power system data storage means 4 are
), search for the CB cutting position closest to the healthy system. In step S43, a human command message is created for the CB cutting position searched in step S42.

In step S44, it is checked whether the operation on the charging route has been completed for all power outage loads and stopped generators, and if not completed, the process returns to step 341/\ and repeats the above process.

According to this embodiment, when the recovery procedure creation knowledge is changed,
Create a recovery procedure using power system data and the knowledge stored in the knowledge storage means to create a recovery procedure before and after the change, and calculate the amount of power supply disruption that will remain in the power system recovery system configured by the recovery procedure. , the two can be compared from the operator's perspective. This makes it possible to automate the verification of the validity of the knowledge of the knowledge engineering application system, making it possible to provide a highly reliable power system accident recovery support device.

In the above embodiment, when the recovery procedure creation knowledge is changed, it is shown to the operator that the change has affected the accident recovery procedure. However, the present invention is not limited to this, and when power system equipment data is changed due to changes in power system equipment, etc., the power system equipment data before and after the change and recovery procedure creation are stored in the knowledge storage means. A recovery procedure may be created using the knowledge that has been provided, and as described above, those with a difference greater than a predetermined value may be displayed.

FIG. 20 is a configuration diagram of an embodiment of the above purpose, and the difference from FIG. 1 is that power system equipment data changing means 12-1 is provided,
The data in the power system data storage means 4 can be changed.

The operational feature is the process of step S6 in FIG. 13, which in this embodiment is a step that operates when the power system simulated accident setting means 11 and the power system equipment data changing means 12-1 are operated. be. Furthermore, knowledge as shown in FIG. 21 is required for the recovery operation command procedure.

The other configurations and operations are the same as those of the embodiments already described, and therefore will be omitted.

Possible ways to evaluate recovery procedures are listed below.

■ When the restoration procedure creation knowledge and power system equipment data are changed, compare the values before and after the change based on the power flow values flowing through each equipment in the post-recovery power system configured by the restoration procedure, and check if the difference is greater than a predetermined value. Display those that have.

■ When restoration procedure creation knowledge and power system equipment data are not changed, compare the before and after changes based on the time required to resolve the supply disruption through the restoration procedure, and display those with a difference greater than a predetermined value. .

■ When the restoration procedure creation knowledge and power system equipment data are changed, the before and after changes are compared based on the amount of power supply disruption by region remaining in the power system after restoration, which is configured by the restoration procedure, and if this is greater than the specified amount. Display those with a difference.

[Effects of the Invention] As explained above, according to the present invention, when restoration procedure creation knowledge or power system equipment data is changed, restoration procedures are created for each condition before and after the change, and the two are automatically compared. With this configuration, the verification time is shortened, many simulated accidents can be verified, and the reliability of verification can be improved. As a result, a highly reliable power system accident recovery support device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a functional block diagram of an embodiment of the power system accident recovery support device according to the present invention, Fig. 2 is a diagram of the power system to be considered, Fig. 3 is a storage side view of the power system data storage means, and Fig. 4 is an interrelationship diagram between healthy systems and accident-influenced considerations, Section 5.
The figure shows an example of storing blocks in the power system data storage means.
FIG. 6 is a diagram that does not show how to create a charging route by the charging route creation means, FIG. 7 is a diagram of an example of saving a recovery route, and FIG. 8 is a diagram illustrating route modification by the charging route modification means.
Figure 9 is a knowledge side diagram of block creation, Figure 10 is a knowledge side diagram of charging route creation, Figures 11 and 12 are knowledge side diagrams of overload elimination, Figure 13 is a flowchart of the entire process, and Figure 14 is System diagram after restoration of power outage due to accident, No. 15
Figure 16 shows a flowchart showing the details of the process related to creating a charging route, Figure 17 shows a flowchart showing the details of the process related to modifying the charging route, and Figure 18 shows the power system data storage means. 19 is a flowchart showing the details of processing related to creating a recovery operation command procedure, FIG. 20 shows the configuration of another embodiment, and FIG. 21 shows the second embodiment.
In the embodiment shown in FIG. 1...Power system 2...Transmitting station 3...Receiving station 4...Power system data storage means 5...Recovery procedure creation knowledge storage means 6...Block division means 7...Charging route Creation means 8...Charging rule I/Modification means 9...Recovery procedure creation means 10...Restoration procedure evaluation means 11...Power system simulated accident setting means 12...Recovery procedure creation knowledge change means

Claims (2)

[Claims] (1) Power system data storage means for storing power system equipment data including status data of the monitored system, power system simulated accident setting means for setting the power system data, and storing knowledge related to recovery from power system accidents. a recovery procedure creation means for creating a recovery procedure for a power system accident by applying the knowledge in the recovery procedure creation knowledge storage means to data in the power system data storage means; a recovery procedure creation knowledge changing means for changing the content of knowledge in the knowledge storage means; a recovery procedure storage means for storing two recovery procedures before and after changing the content of the recovery procedure creation knowledge; An electric power system comprising a recovery procedure evaluation means that compares at least one of [1] to [4] listed below regarding the procedure and outputs an alarm when the difference is larger than a predetermined value. Accident recovery support device. [1] Amount of power supply disturbance that remains in the power system after restoration of the power system configured by the restoration procedure [2] Value of power flow flowing to each facility in the power system after restoration of the power system configured by the restoration procedure [3] Restoration procedure [4] The amount of power supply disruption remaining in the power system after restoration configured by the restoration procedure according to the amount of power supply disruption by region (2) Power system data storage means for storing power system equipment data including status data of the monitored system, power system simulated accident setting means for setting the power system data, and storing knowledge related to recovery from power system accidents. recovery procedure creation means for creating a recovery procedure for a power system accident by applying the knowledge of the recovery procedure creation knowledge storage means to data in the power system data storage means;
a power system equipment data changing means for changing the contents of equipment data in the power system equipment data storage means; a recovery procedure storage means for storing two restoration procedures before and after changing the contents of the power system equipment data; It is characterized by comprising a recovery procedure evaluation means that compares at least one of [1] to [4] listed below regarding the two recovery procedures and outputs an alarm when the difference is larger than a predetermined value. A power system accident recovery support device. [1] Amount of power supply disturbance that remains in the power system after restoration of the power system configured by the restoration procedure [2] Value of power flow flowing to each facility in the power system after restoration of the power system configured by the restoration procedure [3] Restoration procedure [4] The amount of power supply disruption remaining in the power system after restoration configured by the restoration procedure according to the amount of power supply disruption by region