JPH0568170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a recovery operation after removing a busbar accident in an electric station having a busbar, and particularly to a recovery method suitable for unmanned recovery operation.

[Background of the invention]

In recent years, with the advent of high-reliability equipment such as GIS at substations, the frequency of busbar accidents has been decreasing. It is necessary to For recovery operations, first, understand the accident situation,
After creating the restoration range and restoration procedure, the opening and closing operations for restoration are performed, but this series of operations requires knowledge and experience and is still performed by experienced maintenance personnel. however,
In recent years, there has been a trend of a shortage of skilled maintenance personnel, and automatic recovery that can quickly respond to accident situations is desired for early recovery. In addition, the number of unmanned substations has increased recently, and maintenance personnel must be dispatched to unmanned substations for restoration, so there is a high demand for early automatic restoration.

Among the recovery operations, simple ones such as re-closing devices are already being automated. Regarding methods for automating recovery operations that require advanced judgment, Japanese Patent Application Laid-Open No. 151830/1983 established a system generally called a production system as a computer program, and described procedures for grid recovery operations. The method for creating the is described. A production system is a problem-solving method often used in the field of artificial intelligence, especially knowledge engineering. In this method, a plurality of rules such as ``If the state of the target system is A, perform operation B on the working storage area of the system or computer'' are stored as data. In problem solving using this method, first, the state of the target system is detected,
Find a rule with a definition of A that matches the state and perform operation B stated in that rule. Then, the problem is answered by repeatedly detecting the state of the system.

In the above-mentioned known example, this production system is applied to power system restoration operations to enable qualitative and know-how control rather than quantitative control, but the following problems are not recognized.

(1) In the above-mentioned known example, the system is recognized as a circuit network with a substation bus as one node and transformers and power transmission lines as branches. In an actual substation, the busbar is divided into a number of sections, such as a double-bus 4-bus tie configuration, and switching operations of these divided sections are important elements in actual restoration operations, and as described above. Known examples cannot deal with this problem. That is, in the method of the above-mentioned known example, the bus bar can only be completely stopped or completely restored, and partial restoration is impossible.

(2) In an actual busbar accident, the switchgear mentioned above may become inoperable due to a short circuit or ground fault occurring in the circuit breaker or switchgear itself. This inability to operate may be discovered only after actually operating the device. In this case, the recovery operation procedure that has already been created will no longer be valid. The technique according to the above-mentioned known example cannot cope with such an abnormality.

[Purpose of the invention]

The purpose of the present invention is to enable partial recovery of the busbar depending on the accident situation, and to create an alternative recovery operation procedure depending on the situation even if the operated switchgear becomes inoperable during the recovery operation. The object of the present invention is to provide a busbar automatic recovery device that is capable of

[Summary of the invention]

The present invention divides the busbar and the equipment connected to the busbar, such as a transformer, into the minimum unit of the busbar configuration called a section, which will be described later, and installs an accident detection sensor of a system different from a protective relay in each section. Create a recovery procedure based on sensor information and the opening/closing status of the switchgear.
The production system described above is used to create the procedure.

[Embodiments of the invention]

The basic configuration of the present invention, the concept of sections that characterize the present invention, operating rules for creating procedures and their usage, and finally the general flow of creating recovery procedures will be described.

FIG. 1 shows the basic configuration of the present invention. In FIG. 1, 1 is a bus line to be operated, and 2 is a control device that issues an operation command to 1. 2 issues a switching operation command 3 to the switching device 1, that is, a circuit breaker or a switch. Also,
2 is a sensor signal 4 that detects in which part of 1 a short circuit or ground fault has occurred, and a signal 5 that indicates whether the operation command in 3 has been executed normally.
receive. 6, 7, and 8 are all storage devices used by 2. 6 is an operation rule knowledge base that stores operation rules for recovery;
The rule group stored in 1 has a condition part A ₁ indicating the state of the bus bar, and an operation part B ₁ that becomes valid when the condition is met. 7 is a bus bar configuration knowledge base that stores the bus bar configuration of 1; The data stored in 7 is for each switching device, and for example, in data regarding a certain circuit breaker CB1, the names of the sections on both sides of CB1 and the open/closed state of CB1 are stored.
Reference numeral 8 denotes a storage device that stores the restoration operation procedure determined in step 2 and a history of how the states of each switchgear and section change depending on each operation.

Next, the concept of an interval in the bus line representation method, which is a feature of the present invention, will be explained. FIG. 2 is an example of a double busbar configuration having two busbars. In Figure 2, a closed circuit breaker (hereinafter referred to as CB) is represented by the symbol ⓓ, and an open CB is represented by the symbol □.
In addition, closed switches (hereinafter referred to as LS) are ◎
It is represented by the symbol , and an open LS is represented by the symbol ○. In FIG. 2, 101, 102,
103, 104, 105, and 106 are power transmission lines, 301 is a first bus line, and 302 is a second bus line. In addition, in an actual busbar configuration, it is normal for an additional LS to be installed outside the CB of each transmission line.
It is omitted from FIG.

In such a busbar configuration, the sections are defined as follows. A section is the smallest electrically independent unit that occurs when all switchgear such as CB and LS are opened. In other words, the section is a closed part surrounded by the switchgear. Examples of sections in Figure 2 are the 301 K bus line, the 302 B bus line, 101, 102, 103, 104, 105, 1
06 power transmission line is the section. In addition to this,
111, which is a portion surrounded by CB 110 and LS 211 and 212, is also an interval. Similarly 1
21, 131, 141, 151, 161, 31
1,312 is also an interval. 111' and 3 in Figure 2
01' and 312' indicate the ranges of sections 111, 301, and 312, respectively. The present invention is characterized by defining such an interval and treating a portion such as 111, which has been ignored in the past, in the same way as the original bus lines 301 and 302.

By defining this section, CB, which is a switchgear,
LS (hereinafter collectively referred to as switches)
The connection relationships between can be clearly expressed. That is, there can be at most one switch between two sections. In other words, when one switch is designated, the sections at both ends are determined. From this property, a modified bus configuration representation method is obtained in which intervals are nodes and switches are branches. Third
The figure is a representation of this modified busbar configuration, showing the same busbars as in FIG. In FIG. 3, sections are represented by nodes having areas, and switches are represented by solid or broken line branches. Note that a solid line represents a closed switch, and a broken line represents an open switch. The number in Figure 3 is number 2.
The numbers represent the same items as those in the figure.

In the present invention, this modified bus line configuration representation is
It is adopted as an internal representation in the storage device. FIG. 4 shows the format of this internal representation, which is the busbar configuration of FIGS. 2 and 3. For example, the fourth
The first line of the diagram shows that CB110 is between section 101 and section 111, and its open/closed state is closed.
It means that.

Furthermore, in the present invention, each section is given an attribute of being recoverable or prohibited, and this is stored in the storage device 8. This attribute is defined when the operation part _B1 of the operation rule stored in 6 is executed. Therefore, the attributes of each section may change each time each operation rule is applied. 8 also stores the history of changes in this attribute. FIG. 5 shows the storage method of this history, and the attribute list of the section in the initial state is shown at the bottom. Figure 5 shows that when the accident point is detected by the sensor and operation rule 1 is applied, section 14
This indicates that the attribute of No. 1 has changed from recoverable to recoverable. In this way, attributes that change due to application of operation rules are stored as a history in a stacked manner.

Next, we will explain the operating rules for creating recovery procedures.

Each operation rule has a condition section that presents the bus status.
Consists of Ai and operation section Bi. These operating rules basically consist of the following two types of patterns.

If there is a switch S that satisfies the condition part Ai f ₁ (S) = true, open or close the operation part Bi S.

Conditional part A′i If there exists an interval B that satisfies fi(B)=true Operation unit Bi Give B the attribute of recoverable or non-recoverable.

However, the above-mentioned function f ₁ (x) is a logical function that has a value of true or false.

The task of detecting a rule that matches the bus status, which is the principle of creating the recovery procedure of the present invention, is to detect a rule that matches the bus status by detecting a switch that makes true the function f ₁ (x) (hereinafter referred to as the search function) described in the condition part. or interval 7 and 8
This is achieved by searching from . Such a switch and interval search mechanism does not write the interval name or switch name, which is a proper noun, in f ₁ (x) indicating the condition.

Additionally, a priority level is set for each operation rule. This is to apply the operation rule with the highest priority level when there are multiple operation rules that match the condition part Ai to the state of a certain bus line. By setting this priority level, it becomes possible to execute a recovery operation with a high priority.

Below are six examples of operating rules. of course,
Operation rules other than these can be created.

Operation rule 1 (priority level 1000) Definition: "Give the section where the accident occurred an attribute that prohibits restoration." The search function f ₁ of the condition part A ₁ and the operation part B ₁ are described as follows.

A ₁ :f ₁ (x)△=faulted(x) B ₁ :Set x=Recovery prohibited Note that the symbol △= means that the function on the left side is defined on the right side, and faulted(x) means that the function on the left side is defined on the right side. It is a logical function that becomes true when an accident occurs. That is,
f ₁ (x) is if there is an interval x that makes faulted(x) true,
becomes true.

In addition, all of the sections are given the attribute of being recoverable before the accident.

Operation rule 2 (priority level 900) Definition: "If there is a closed switch connected to a section with the attribute of prohibiting recovery, open it. If the switch cannot be opened due to a failure, prohibit recovery via this switch. The condition part A ₂ and the operation part B ₂ are described as follows.

A ₂ : f ₂ (SW) △ = unrestorrable (x) ∧ path (x, SW, y, close) B ₂ : Open (SW), if. Inoperable then Set y = Restoration prohibited However, the symbol ∧ is logical represents the product.

unrestorable(x) is true when x is a section that has the attribute of prohibiting restoration (hereinafter, such a section will be referred to as a restoration prohibited section). path is a closed switch connected to interval x, given interval x
This is to search for SW and the section y, which is the node on the opposite side of SW. For example, in the data in Figure 4, if x is given an interval (101), then
SW corresponds to CB (110), and y corresponds to section (111).

The operation section _B2 indicates that the SW obtained in the condition section is to be opened. Also, if
It is shown that if this SW is inoperable, an attribute of prohibition of restoration is given to section y.

Operation rule 3 (priority level 800) Definition: "The recovery-prohibited section is the bus line, and sections in parallel with that section, such as A and B, have the attribute of being recoverable (hereinafter, such sections will be referred to as recoverable sections. ), and there is a section that can be restored by a third party,
A switch exists between this third party and the first recovery prohibited section, and an open switch exists between the second recoverable section and the third recoverable section. If you open the former switch,
Then close the latter switch.'' The definitions of the condition part A ₃ and the operation part B ₃ of this rule are as follows.

A ₃ :f ₃ (SW1, SW2)△=unrestorable(x)∧ primary−bus(x)∧ parallel(x, y)∧ restorable(y)∧ path(x, SW1, z, 〓)∧ restorable(z )∧ path(y, SW2, z, close) B ₃ :Open(SW1) Close(SW2) However, primary-bus(x) is a function that is true when the interval x is the generatrix, and parallel(x ,y)
is a function that determines an interval y that is in a parallel relationship with x, and restorable(y) is a function that is true when y is a restorable interval. path(x, SW1, z,
〓) When the interval x is given, find the switch SW1 connected to x and the interval z on the opposite side. 〓
means that it does not matter whether SW1 is open or closed.
Path (y, SW2, z, close) determines the closed switch SW2 connected to the section y and the section z on the opposite side.

The operation part _B3 means first opening SW1 and then closing SW2.

The meaning of this operating rule will be explained using FIGS. 6 and 7. FIG. 6 is an extracted part of FIG. 2, where 301 is the first bus line and 302 is the second bus line. 110 is a closed CB, 211 is a closed LS, and 212 is an open LS. 7th
The figure is a modification of FIG. 6 into a section representation. This operation rule means that when the section 301 is a restoration prohibited section, the LS 211 is opened, the LS 212 is then closed, and the power transmission line 101 is switched from the first bus line 301 to the second bus line 302. In the function definition of A ₃ , x corresponds to 301, y corresponds to 302,
SW1 is 211, z is 111, SW2 is 21
2 respectively apply.

Operation rule 4 (priority level 600) Definition: "If there is a closed switch connecting the restoration prohibited area and the restoration prohibited area, open it." Condition part A ₄ and operation part B ₄ of this rule are as follows. defined.

A ₄ :f ₄ (SW)△=unrestrable(x)∧ path(x, SW, y, close)∧ restorable(y) B ₄ :Open(SW) Operation rule 5 (priority level 400) Definition: If the CB is a CB of a power transmission line or transformer, and the sections at both ends of the CB are both recoverable sections, close this CB.'' Condition part A ₅ and operation part B ₅ of this rule are as follows: Shown below.

A ₅ :f ₅ (SW)△=tripped(SW)∧ line−CB(SW)∧ path(x, SW, y, open)∧ restorable(x)∧ restorable(y) B ₅ :Close(SW) Above line−CB(SW) is a function that is true when SW is the CB of the transmission line or the CB of the transformer.

This rule will be explained using FIGS. 8 and 9.
Figure 8 is an extracted part of Figure 1.
01 is the first bus line, 302 is the first bus line, and 101 is the power transmission line. 110 is a tripped CB,
211 is a closed LS, and 212 is an open LS.
FIG. 9 is a diagram representing FIG. 8 using sections and switches. The CB of a transformer or transmission line described in this regulation corresponds to 110 in Figures 8 and 9. This rule applies to 101, which is the interval at both ends of 110.
If 111 and 111 are recoverable sections, this means that 110 is closed.

Operation rules (priority level 400) Definition: "The tripped CB is the CB between the busbars,
The accident did not occur on the busbar, and the above CB
If both ends of the CB are recoverable sections, close this CB. ” The condition part A ₆ and the operation part B ₆ of this rule are described as follows.

A ₆ :f ₆ (SW)△=tripped(SW)∧ cb−between−buses(SW)∧ path(x, SW, y, open)∧ restorable(x)∧ restorable(y)∧ faulted(z)∧ bus(z) B ₆ ：Close(SW) In the above cb−between−buses(SW), SW is
This is a function that is true when there is a CB between the busbars.
Moreover, bus(z) is true when z is a bus line.

The CB between busbars as defined in this rule will be explained using Fig. 10. Fig. 10 is an example of the busbar configuration of a double busbar 4 bus tie configuration, and 501 is the first busbar of A;
502 is between the first busbars, 503 is the first busbar, and 504 is the second busbar. 505,50
6,507,508 are CBs, and the inter-bus CBs in this rule refer to these CBs. The definition of this rule is that, taking 505 as an example, 505 is tripped, and the sections 509 and 510 at both ends of 505 are tripped.
If both are recoverable sections and the accident occurrence section is 501, 502, 503, or 504, this means that 505 is closed.

Above, examples of six types of operation rules have been described.

Finally, a general flow for creating a recovery procedure will be explained.

FIG. 11 is a schematic flowchart for creating a recovery procedure.
Procedure creation is divided into two steps. 1st
This step is the step of creating a recovery procedure, and the second
The step is a step in which the actual switch opening/closing operation is performed according to the procedure created in the first step. Blocks 601, 602, in the first step
In step 603, the switch to be operated is determined based on the aforementioned operating rules. However, the operation executed in step 603 is not an actual opening/closing operation of the device, but the contents stored in the storage device, such as the bus configuration knowledge base in 7 and the operation procedure and classification history in 8, shown in FIG. It is carried out against The operations from 601 to 603 are repeated until the creation of the recovery procedure is completed, but the open/close status of each switch and the attributes of each section change each time 603 is executed. The history of these changes is shown in Figure 5. As shown, it is stored inside 8.

The second step of the recovery operation is a step in which the actual switch opening/closing operation is performed according to the procedure chart (stored in 8) created in the first step. In this case, in block 604, it is determined for each individual switch operation whether the operation was executed normally. If the operation is normal, the next switch operation is performed, but if the switch is found to be abnormal, feedback 605 is activated.

The operation of 605 will be explained below with reference to FIG. In FIG. 12, 606 to 61
0 is the operating procedure created in the first step, and 611 to 616 indicate the open/close state of the switch and the attribute of the section, which vary depending on each operation. 606
.about.616 are stored at 8 in FIG.

In the second step of the recovery operation, 606-6
Consider a case where it is found that the switch cannot be operated in the i-th operation 608 while performing the operations according to the procedure in step 10. In this case, in the present invention, 613, which is the state i-1 immediately before determining 608, is stored in the storage device 8.
A new state 619 is created by applying the operation rule j of 618, which defines the work to be done when the operation 608 is impossible, to this 613. Thereafter, by searching for a matching operation rule for 619, 619, which is an alternative operation procedure, is determined.
~621 is created. The above is the outline of the feedback 605 in FIG. In addition,
As a specific example of 618, the above-mentioned operation rule 2
(priority level 900).

FIG. 13 shows the basic configuration of this embodiment. 13th
In the figure, 700 is a control device that creates a recovery procedure and issues commands to open and close each switch. 700
The interface with the substation busbar is made up of a switch opening/closing control device 701, a device 702 that detects the opening/closing status of each switch, a protective relay device 703, and a device that detects the occurrence of an accident in each section. This is done via a certain 704. 705 is a device that stores recovery operation rules. 706 is 701
This is a device that stores the operating procedures determined by the above, and also stores the attributes of each section that change depending on the application of each operation and the history of the open/closed state of each switch. Reference numeral 707 is a device that stores the connection relationship between sections and switches and the current open/close state of each switch.

FIG. 14 is a diagram showing an overview of 702 and 704. 702 monitors LSs such as 745 to 749 and CBs such as 750 and 751, and transmits the open/closed state to 700. 704 is 752-757
Collect information from sensors installed in each section, such as
This is a device that detects in which section an accident occurred.

FIG. 15 is a diagram showing the internal configuration of 707. Reference numeral 707 is a device that stores the bus configuration and the open/close status of each switch, and its interior includes a section 717 that stores the section and the connection status of the switch, a section 718 that stores the open/close status of each switch, and a control circuit. Consists of 719. In 717, there is a pair of one section and a switch for one switch, and the switch and the section names at both ends thereof are stored. 7
The contents of 17 are fixed. 718 is a register corresponding to each switch and stores the open/closed state of each switch. The contents of 718 vary depending on the recovery procedure.
When 719 receives a search command signal 720 regarding the bus configuration or switch status, it searches the data 717 and 718 and transmits an answer signal 721.
722 is a switch opening/closing command due to a recovery operation, and 7
Upon reception of 22, the contents of 718 are updated.

FIG. 16 shows the internal configuration of 706. 706 is a section 723 that stores the history of the status of each switch.
and a portion 724 that stores the history of attributes of each section.
and a control device 725. 725 inputs a signal 725 indicating a recovery operation and associated changes in switch open/close status and section attributes, and stores the status of each switch in a register 726 and the attribute of each section in a register 727. It also sends the operation to register 728 . Also, each operation is performed in register 7.
28, the contents of register 726 are sent to a stacked storage circuit 729. 729 is LIFO stack (Last-In-First-
Out), the contents of 726 are stored sequentially with each operation. The contents of 727 are similarly stored in 730, and the contents of 728 are similarly stored in 731.

Next, creation of a recovery procedure according to this embodiment will be explained along with the operation of each device. Two types of operation examples will be explained. 1
One is an example of the operation in the first step (creating a recovery procedure) in FIG. 11, and the other is an example of the operation when the switch becomes inoperable in the second step (execution of the recovery operation).

(1) Operation example 1 As an example of an accident, we will take a case where an accident occurred at location 800 in Figure 17. Figure 17 is a diagram showing the same bus line as Figure 2, and the accident point 800 is within section 141, and the closed LS 242 and section
This is the point of contact with 1. As a result of this accident, busbar 301
The relay that protects CB120 and CB14 operates.
0, CB160 and CB300 tripped. 1st
Figure 8 is a representation of Figure 17 using sections and switches, and is in the same format as Figure 3. However, the opened switch is not shown. Also, a tripped CB is indicated by a 〓 symbol.

Hereinafter, changes in the memory contents of 706 and 707 will be explained using the notation shown in FIGS. 17 and 18.

(1-a) When an accident occurs, the tripped CB and the section where the accident occurred are sent to 706 and 707 in accordance with the signals from 702, 703, and 704, and the initial state for creating a recovery operation procedure is set. Additionally, all sections are given the attribute of being recoverable.

(1-b) Recovery procedure creation is started, and the first operation rule that matches the situation is operation rule 1 with priority level 1000. By applying this rule, section 1
41 is given the attribute of prohibiting recovery. In FIG. 18, this restoration prohibited section is indicated by hatching.

(1-c) The next rule that matches the situation is operation rule 2 (priority level 900). By applying this rule, LS24, which is a switch around the restoration prohibited section 141,
2 will be opened. This operation is illustrated in FIGS. 19 and 20. Note that the tripped CB is not shown in Figure 20.

(1-d) The next rules that match the situation are operation rules 5 and 6 (both with priority level 400). 120 and 160, which are transmission line CBs, by application of the respective rules.
and the busbar CB 300 is closed. This operation is shown in FIGS. 21 and 22.

With the above, everything except the power transmission line 104 has been restored. Whether or not 104 will be restored depends on the nature of the accident that occurred at 141. In this example, a case is assumed in which restoration is not performed.

(2) Operation example 2 Here is an example where the target switch becomes inoperable while implementing the created recovery procedure. The same accident situation as in the first operation example is set for the accident in this operation example.

The recovery procedure creation stage is the same as operation example 1, and according to the recovery procedure, the LS242 operation (1
-c) Due to accident 801,
This operation example is when the LS242 itself is damaged and cannot be opened. This situation is shown in FIGS. 23 and 24.

(2-a) Due to the LS242 inoperability function, the history of the switch status and section attributes stored in 706 is retrieved, and the registers 706 and 707 are changed to the state at the stage (1-c) when the LS242 operation was decided. will be reset.

(2-b) In this situation, the inoperability clause of Operation Rule 2 is met. By applying this rule, the section 302 that connects to the restoration prohibited section 141 via the LS 242 is also given the restoration prohibited attribute. This operation is shown in FIGS. 25 and 26. In FIG. 26, 302, which has become a new restoration prohibited section, is hatched with diagonal lines.

(2-c) The next rule that matches the situation is operation rule 3 (priority level 800). By applying this rule, 30
LS222 and LS262 connected to LS2 are opened, and then LS221 and LS261 are closed. Through these operations, connection switching of the section 121 and the section 161 from the section (bus line) 302 to the section (bus line) 301 is achieved. This operation is shown in FIGS. 27 and 28.

(2-d) The next rule that matches the situation is operation rule 4 (priority level 600). By applying this rule, LS41
2 will be opened. This operation is shown in FIGS. 29 and 30.

(2-e) The next rule that matches the situation is operation rule 5 (priority level 400), and by applying this rule, CB1
20 and CB160 are closed. Repeat this operation in the third
This is shown in Figures 1 and 32.

(2-f) As described above, the power transmission lines except 104 are connected to 301 and restored. Next, the process returns to the second step in FIG. 11 based on the procedure created so far, and the switch operation for actual recovery is restarted.

The description of the operating rules used in this embodiment and the example of automatically creating operating procedures based on the rules have been described above.

According to this embodiment, the following advantages can be obtained.

(1) Flexibility of rules The operating rules of this example consist of a part that recognizes the open/closed state of the switch and the classification status of each section, and a part that specifies the operation of the switch. It is simply described in terms of the relationship between intervals and switches, without using . Therefore, the operating rules of this embodiment have the advantage that they can be applied to electrical stations with any busbar configuration, regardless of the busbar configuration of this embodiment.

(2) Implementation of LS operation restrictions Due to its current interrupting ability, LS must not be opened while current is flowing. In this example, by defining operation rules with priorities,
First, open and close the switches between the power outage sections, and finally close the CB to energize the power outage sections. Therefore, without explicitly stating the restrictions regarding the operation of LS in the operation algorithm,
It has the advantage of being expressed naturally.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

(1) Versatility and scalability The present invention describes a method for grasping the status of bus bars and switches at an electric station in the form of conditional search for sections and switches. This search is expressed as a logical product of individual conditions, and is versatile in that it can be applied to any bus configuration. When applying to individual substations, it is only necessary to create data that represents connections between sections and switches, and if the busbar configuration is changed due to substation remodeling or expansion work, the data that represents the connections between sections and switches can be created. It also has extensibility in that only the corresponding data needs to be changed.

(2) Situation Adaptability In the present invention, since the history of data at the time of creating a recovery procedure is saved, even if an error occurs during actual switch operation, an alternative recovery procedure can be created according to the situation. Has the ability to adapt to situations.

In addition, depending on the situation, busbars can be switched, making it possible to perform detailed operations such as partial restoration of electric station busbars.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic configuration of the present invention. Figure 2 shows an example of the electrical station busbar configuration;
This figure is a diagram expressing the bus bar configuration shown in FIG. 2 using the concepts of sections and switches based on the present invention. FIG. 4 is a diagram illustrating the connection relationship between the sections and the switches and the storage method of the open/closed states of the switches. FIG. 5 is a diagram showing the history of attributes of each section. FIG. 6 is a bus bar configuration diagram for showing bus bar switching according to operation rules, and FIG. 7 is a diagram expressing the configuration of FIG. 6 using sections and switches. FIG. 8 is a bus line configuration diagram similar to FIG. 6, and FIG. 9 is a diagram expressing FIG. 8 using sections and switches. FIG. 10 is a diagram showing an example of CB between bus bars. FIG. 11 is a flowchart for creating a recovery procedure and implementing recovery. FIG. 12 is a transition diagram of the attributes of each section and the open/closed state of the switch for each restoration operation. FIG. 13 shows the basic configuration of the embodiment, and FIG. 14 is a diagram of a device that collects information from the bus and switches. FIG. 15 is a configuration diagram of a storage device that stores the busbar configuration and the open/closed states of switches, and FIG. 16 is a configuration diagram of a storage device that stores the history of the attributes of each section and the history of the open/closed states of each switch. . 17 to 32 are diagrams showing an example of creating a recovery procedure according to the embodiment, and FIGS. 17, 19, 21, 23, 25, 27, and 29 31 and 31 are bus line configuration diagrams, and the others are expression diagrams using sections and switches. 6... Operation rule knowledge base, 7... Bus configuration storage device, 8... Section attribute and switch state history storage device,
101...An example of a section, 110...An example of a switch,
704...Intra-section accident detection device, 702...CB opening/closing state detection device.

Claims (1)

[Scope of Claims] 1. In an automatic bus recovery device that sequentially determines switching operation recovery procedures for a plurality of switchgears installed in a power system using an inference system, the power system surrounded by the switchgears is the minimum unit. , attribute storage means for storing the recovery state of the minimum unit, either recoverable or non-recoverable, as an attribute for the minimum unit together with the minimum unit; an operation rule storage means for storing a recovery operation rule including a reference condition section and a conclusion section for instructing a predetermined opening/closing operation of the switchgear for the condition section; and the minimum unit connected to the switchgear. bus bar configuration storage means for storing the connection relationship and the opening/closing state of the switching device; Based on the recovery operation rules,
An automatic bus recovery device comprising: control means for sequentially determining a recovery procedure for opening/closing operations of the switch using an inference system. 2. In claim 1, the restoration operation rule in the operation rule storage means is such that the minimum limit of the restoration prohibition is set while the opening/closing device is being restored in accordance with the opening/closing operation restoration procedure obtained from the control means. An automatic bus recovery device characterized by having a rule that prohibits recovery of attributes of other minimum units connected to the switching device when the switching device connected to the unit cannot be opened or closed. 3. In claim 2, there is provided an operation procedure storage means for storing the opening/closing operation recovery procedure obtained by the control means, and when the opening/closing operation recovery procedure cannot be executed due to the opening/closing operation of the opening/closing device being impossible, the The automatic bus recovery device is characterized in that the control device returns to the point before the determination of the opening/closing operation recovery procedure stored in the operation procedure storage means and sequentially determines the opening/closing operation recovery procedure again using the inference system.