JPH0251326A - Stop schedule adjustment assisting device - Google Patents

Abstract

PURPOSE:To carry out adjustment accurately and quickly by reasoning the relation between the influence of stop schedule onto a power system and another stop schedule then displaying the validity of the stop schedule. CONSTITUTION:A stop schedule data storing means 11 stores the content of a stop schedule while a power system date storing means 12 models a power system and stores the modeled state and a knowledge storing means 13 stores knowledge necessary for judgement of the validity of the stop schedule. Upon request from a CRT unit 2, a reasoning means 14 applies the knowledge stored in the knowledge storing means 13 for the content stored in the stop schedule data storing means 11, and reasons the influence onto the content stored in the power system data storing means 12 or the relation between the stop schedule data storing means 11 and other stop schedule. Then the validity of the stop schedule is displayed on a CRT unit 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an outage plan adjustment support device that supports the task of adjusting an outage plan for an electric power system.

(Prior Art) When performing maintenance or construction on equipment that constitutes a power system, such as power transmission lines and transformers, the equipment is stopped and placed in a voltage-free state for safety reasons. The work performed by stopping the equipment 17 in this way is called a power outage work, and the plan for the power outage work is called a power outage plan. In order to prevent unnecessary power outages to customers who use these facilities to receive electric power, Su needs to adjust the outage plan to obtain the consent of customers regarding the power outage.

In order to make this adjustment, we confirm that there are no problems while examining details such as the balance between power supply capacity and load, the capacity of transmission lines and transformers, the installation status of protective relays, and the convenience of customers. There is a need to.

(Problem to be solved by the invention) As power systems become larger, the number of outage plans is also increasing.Furthermore, as power systems become more complex and social responsibility for stable power supply increases, Coordinating outage plans such as those described in 2.1 will be extremely difficult.

Against this background, there is an increasing demand for computer-assisted adjustment of shutdown plans, but such technology has not yet been established.

The present invention has been made in view of the above circumstances, and it is possible to infer the impact of an outage plan on the power system, such as the range of outage, customer convenience, or relationship with other outage plans, and evaluate the validity of the outage plan. The purpose of the present invention is to provide an outage plan adjustment support device that supports an outage plan adjustment person by showing the following information.

[Structure of the invention]

(Means for Solving the Problems) To explain the present invention with reference to FIG. 1, the present invention includes a shutdown plan data storage means 11 that stores the contents of a shutdown plan, and a system that stores equipment constituting an electric power system and their connection states. an electric power system data storage means 12 that stores knowledge for determining the validity of the outage plan; and a knowledge storage means 13 that stores knowledge for determining the validity of the outage plan, and applies the knowledge of the knowledge storage means to the data of the outage plan data storage means. The system includes a reasoning means 14 for determining the validity of the outage plan based on the influence on the power system and other outage plans.

(Function) The outage plan data storage means 11 stores various contents of the outage plan, and the power system data storage means 12 stores each piece of equipment constituting the power system and their connection relationships. Here, the request from the CRT device is accepted, and the knowledge storage means 13 receives the request from the stop plan data storage means 11.
The influence of this outage plan on the power system data storage means 12 and the relationship with other outage plans in the outage plan data storage means 11 are inferred by applying the knowledge of the outage plan. As a result, the validity of the suspension plan is displayed.

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

FIG. 1 is a functional block diagram of an embodiment of the stop needle ii@adjustment support device according to the present invention.

In FIG. 1, reference numeral 1 denotes an electronic computer, which includes an outage plan data storage means 11 that stores the contents of an outage plan, an electric power system data storage means 12 that models the power system and stores its state, and a computer that determines the validity of the outage plan. The knowledge storage means 13 stores knowledge for determining the system, and the request from the CRT device 2 is received and the knowledge stored in the knowledge storage means 13 is applied to the contents of the stop plan data storage means 11. , an inference means 14 that infers the influence on the contents of the power system data storage means 12 and the relationship with other outage plans in the outage plan data storage means 11, and displays the validity of the outage plan on the CRT device 2.
It consists of

FIG. 2 shows power supply to the CRT device 2, and is shown with respect to the power system shown in FIG. In the figure, the underlined portions are the inputs of the person in charge of adjusting the suspension plan, and the other portions are the outputs from the inference means 14. FIG. 3 is a flowchart showing the processing for outputting as shown in FIG. 2, which is performed by the inference means 14.

First, in step S31, a request from the CRT device 2 is accepted. All the underlined inputs shown in FIG. 2 are accepted as requests. In step 32, the input accepted in step S31 is determined, and if there is a request for inference, the process proceeds to step S33; otherwise, for example, rOK, ], the processing for supporting adjustment of the stoppage plan is terminated. Next step 3
In 3, we consider the impact of the outage plan on the power system, for example, from the scope of the outage, the convenience of customers, and the relationship with other outage plans.
．． Infer validity. In step S34, step 33
3 is displayed on the CRT device 2. By repeating steps S31 to S34 described above,
Assist in coordinating outage plans.

Step S31゜S3 of the flowchart shown in FIG.
3. The inference processing in S34 will be explained in detail below.

First, a configuration example of the outage plan data storage means 11 will be explained using FIGS. 4(a) and 4(b). What is shown in FIG. 4 is part of the suspension plan data, and these data, from order to priority, form a set of data regarding one suspension plan. For example, the outage plan for time 1 uses power transmission line L1 as the outage equipment, and the outage date and time is Tuesday, November 10, 1962.
9:00 until 3:00 p.m. The work was suspended to install anti-snow gear. During this period, all customer service was interrupted, and among the customers receiving power from two lines, the power transmission line L1 was disconnected. There is no customer who uses the transmission line L1 as a backup line, and there is a customer C who uses the power transmission line L1 as a backup line, indicating that the priority of the plan is B. Below, No. 2. N
o, 3. The suspension plan data shown in No. 4 can be read in the same manner as described above, so a detailed explanation thereof will be omitted.

FIG. 6 shows an example of the configuration of the power system data storage means 12.

What is shown here is part of the power system data stored in the power system data storage means 12, and is explained by taking the power system shown in FIG. 5 as an example.

To explain power system data 1, the equipment type of power transmission line L1 is a power transmission line, and the connected equipment includes substation A, customer C1, and substation B.
is the connected state with the switch AL210, consumer C is the open state with the switch CLO10, and consumer C is the open state with the switch DLO10.
It is connected to substation B with switch BL130, and the equipment tolerance is 400M V A''
``C'' indicates that the power transmission line L3 is a facility that must be stopped to prevent danger.

In addition, regarding power system data 2, as above, the equipment type for the customer is customer, and the connected equipment is the transmission line L.
1, it is connected to the power transmission line L1 through the switch DLO10, the contracted power is 200KW, the business day is every Wednesday, and there is a special note that there is an understanding of the power outage work and it is easy to get consent. Yes, indicating that the importance of the customer is D. In this way, information necessary for adjusting the outage plan, such as closed days and special notes, is stored.

Next, a specific example of the knowledge stored in the knowledge storage means 13 will be explained. The knowledge stored here is knowledge regarding the impact of the outage plan on the power system and knowledge about the relationship of the outage plan with other outage plans. First, knowledge regarding the impact that outage plans have on the power system includes knowledge that the contents of the outage plan directly impact the power system, such as registering the scope of outage and customer convenience in short-term memory, and knowledge that the contents of short-term memory There is knowledge of manipulating fishing season memory for secondary effects.

Figure 7 shows the direct impact of the contents of the outage plan on the power system, such as the knowledge that registers the power outage range and customer convenience in short-term memory, and Figure 8 shows the secondary impact from the contents of the fishing season memory. Figure 9 shows the knowledge of manipulating short-term memory, and Figure 9 shows the knowledge of the relationship of a stop plan with other stop plans.

Then, the output example in Figure 2, the stop plan example in Figure 4, the example in Figure 5,
A detailed explanation will be given below using the situation of the example power system shown in FIG. 6 as an example.

Focusing on the first knowledge in Fig. 7 and the outage plan in order 1 shown in Fig. 4(a), 110.1, Outage equipment: power transmission IL
I. Suspension date and time: 62-1l-10 (Tue).

There is an outage plan for 9:00-15:00, and outage plan meeting 1
An IP department has been established in which there is a total outage of customers and customers, and 62-1l-10 (Tuesday>, 9:00-
At 15:00, data indicating that the customer will experience a power outage is registered in the short-term memory. Similarly, focusing on the second knowledge and the outage plan No. 2 shown in Fig. 4(a), 110.2, Outage equipment: Transmission line L2. Outage date and time: 62-1l-10 (Tuesday), there is an outage plan from 9:00 to 15:00, and an IP section has been established that says outage plan No. 2 has a constant line customer: customer C. 62-it-io<Tue>, 9:00-15:00, data indicating that customer C will be switched to a protection line is registered in the short-term memory for 1st and 2nd.

Similarly, focusing on the third knowledge and the outage plan of No. 1, No. 1, outage equipment: transmission line Ll, outage date and time: 6
2-11-10 (Tue>, there is an outage plan from 9:00 to 15:00, and the IP section that there is a protection line consumer C in the outage plan 110.1 is established, and for NO, t. 62
-11-10 (Tuesday), from 9:00 to 15:00, data indicating that customer C cannot switch to the protection line is registered in the short-term memory.

Next, Figure 8 shows the knowledge for manipulating short-term memory regarding secondary effects from the contents of short-term memory. Focusing on the first knowledge and the data registered in the fishing season memory mentioned above, NQl
for 62-11-10 (Tue>, 9:00-15:Q
There is data in Q that customer C cannot switch to the protection line, and 62-11-10 for NO, 2.
(Tuesday), there is data that customer C will be switched to the backup line between 9:00 and 15:00, and 62-1l
-10 (Tue>, 9:00-15:00 and 62-1l-1
0 (Tuesday>, 9:00-15:00 overlaps) is established, and for NO, 2, 62-11-10
(Tue>, 9:00-15:00C Data that customer C will experience a power outage is registered in short-term memory.

In addition, when the request to execute NO, 2 is accepted from the CRT device 2 and registered in the short-term memory as shown in the execution example of FIG. 2, in the second knowledge of FIG. The data that Plan No. 2 will be implemented was received on 62-11-10 (Tuesday).

At 9:00-15:00, there is data indicating that customer C cannot switch to the protection line, and 110.
2 for 62-11-10 (Tue), 9:00-15
There is data that customer C will be switched to a backup line at 62-11-10 (Tuesday).

9:00-15:00 and 62-11-10 (Tue).

9:00-15:00 overlap, 6 for Shuu 2
2-1l-10 (Tue), 9:00-15:00, the IF section was established that customer C would experience a power outage, and it was embarrassing.
1 for 62-1l-10 (Tue>, 9:00-15:
At 00, the data indicating that customer C cannot switch to the protection line is deleted from the short-term memory, and the data is deleted from the short-term memory.
At 5:00, the data that customer C will experience a power outage is deleted from short-term memory as before, and 6 for 1 is deleted.
On 2-11-10 (Tuesday), from 9:00 to 15:00, the data that customer C will experience a power outage is registered in short-term memory, and the power outage plan as the basis for customer C's power outage is compiled. Changed from 2 to NO, 1.

Also, if we apply the third knowledge in Figure 8 to the short-term memory data and the contents of the power system data in Figure 6, we will get 62-11-10 (Tuesday) for the first meeting.

There is data that there will be a power outage for customers from 9:00 to 15:00, and there is an IF that 62-1l-10 (Tue), 9:00 to 15:00 is a holiday for customers. Data is registered in the short-term memory that the shutdown plan NQI can be implemented because the department is established and the customer is closed.

Next, Fig. 9 shows the knowledge about the relationship between the stop plan and other stop plans, and the shame shown in Fig. 4, 2 and! Focusing on the 1Q3 outage plan and the contents of the power system data in Figure 6, it can be seen that 3. Stop installation iI: Switch AL22G.

Outage date and time: 62-11-10 (Tue), 10:00-1
There is a shutdown plan at 5:00, the equipment type of switch AL220 is a switch, and switch AL220 is installed 1j: Power transmission IIaL2 switch tear, No. 2, f9 stop B
(fm: Power transmission t!IL2. Outage date and time: 62-1l-1
0 (Tuesday).

There is a planned outage from 9:00 to 15:00, and 62-11-
10 (Tue), 10:00-15:00 and 62-11-
10 (Tuesday), 9:00-15:00 overlap, the IF part is established, and the stop plan 3 is the stop plan No.
2 is registered in short-term memory. As a result, as shown in the execution example of FIG. 2, NO33 is output along with 2, which is a shame.

Due to the request to execute 2, N053 is also no longer output.

FIG. 10 is a flowchart of the processing contents of step S31 shown in FIG. In step 5100, the input from the CRT device 2 is taken in, the data taken in in step 5101 is determined, and an inference start request is issued, for example, r ST^.
RT. '', the process advances to step 5102; otherwise, the process advances to 8103. In step 5102, the contents of the short-term memory are initialized, and the contents of the shutdown plan data storage means 11 and the power system data storage means 12 are stored in the short-term memory. In step 3103, the data acquired in step 5100 is registered in short-term memory, and the process of step S31 in FIG. 3 is ended.

FIG. 11 is a flowchart of the inference process in step S33 in FIG. In step 5110, knowledge storage means 1
Take out one piece of knowledge from 3. Next, in step 5111, the IF part of the knowledge retrieved in step 5110 is compared with the contents of short-term memory, and it is determined whether the IF part is satisfied. If the IF part is satisfied, step 511
The process proceeds to step 2, and if the condition is not satisfied, the process proceeds to step 5113. In step 5112, the knowledge satisfied by the IF section is added to the competing knowledge set and saved. Step 511
In step 3, it is determined whether all the knowledge has been applied. If all the knowledge has been applied, the process proceeds to step 5114, and if there is other knowledge, the process returns to step 5110. In step 5114, if even one is saved in the competing knowledge set, step 5
The process advances to step 115, and if there is no one in the knowledge set, the inference process of step S33 in FIG. 3 is ended.

In step 5115, one piece of knowledge is selected from the competing knowledge sets according to a predetermined criterion, the THEN part is executed on the short-term memory, the competing knowledge set is initialized, and all the knowledge is targeted again. The process returns to step 5110.

Next, the process of step 334 in FIG.
This is a process of outputting the contents of the short-term memory newly added in step 3 to the CRT device 2 in a predetermined format, as in the execution example shown in FIG.

In the above embodiment, the knowledge stored in the knowledge storage means C is as follows:
Knowledge of the impact of the outage plan on the power system, such as the scope of the outage and customer convenience, as well as other outage plans (
We have explained the knowledge related to this influence. However, the knowledge is not limited to each of the above types of knowledge, and may include knowledge regarding system reliability (power flow frequency, voltage, stability, etc.), knowledge regarding simultaneity of outage plans, and knowledge regarding consistency of outage plans.

This will be explained in sequence below.

FIG. 12 is a specific example of knowledge regarding system reliability. FUNCTIOH shown here indicates that the specified procedure program is to be executed there.

Suppose that if the outage plan No. 2 shown in Figure 4 (a) is implemented, an overload will occur on the transmission line L1 of the power system shown in Figure 5. Based on this knowledge, 62 -1l-10 (Tue), there is data that customer C will be switched to the backup line from 9:00 to 15:00, and during the period from 9:00 to 15:00 on 62-11-10 (Tue). When all the switching has been carried out and the procedure program that creates the grid for that period is executed and power flow calculations are performed, an IF section is established that indicates that the equipment: transmission line will be overloaded, and the power flow will be overloaded.

62-11-10 (Tue), 9:00-1' for 2
At 5:00, the data that 1 was overloaded and stretched over the power transmission line is registered in short-term memory.

FIG. 13 is a specific example of knowledge regarding the simultaneity of stop plans. We will focus on the outage plans for Surprise 2 and N053 shown in FIGS. 4(a) and 4(b) and the contents of the power system data in FIG. 6. In this case, between the stop plans shown in FIG. 4(b),
3 outage date and time is 62-11-10 (Tue).

62-11-11 (Wed) instead of 10:00-15:00
, 10:00-15:00, No.3
+ Stop installation: Switch AL220. Stop date and time: 62-1l
-11 (Wednesday>, there is an outage plan from 10:00 to 15:00, the equipment type of switch AL220 is a switch, switch AL220 is a switch for installation m: power transmission @ L2, shame,
2. Stop membrane 11: Power transmission line L2. Stop date and time: 62-11
-10 <Tuesday>, 9:00-15:00 outage plan, 62-11-11 (Wednesday), 10:00-15:00
and 62-1l-10 (Tuesday>, 9:00-1.5:00 do not overlap), and the IF part is established, and during the outage plan, 3
Data indicating that this should be executed simultaneously with stop plan No. 2 is registered in the rule memory.

FIG. 14 is a specific example of knowledge regarding the consistency of the outage plan. During the period shown in Fig. 14(a), focusing on the outage plan in 1 and the contents of the power system data in Fig. 6, we find that: shame, ■, outage pitch fiII: transmission line Ll, outage date and time; 62-1l-10
(Tuesday>, There is a planned outage from 9:00 to 15:00, the equipment type of power transmission line L1 is a power transmission line, and the equipment to be shut down to prevent danger on power line L1 is power transmission line L3. Love? Outage equipment: The IF department has established that there is no outage plan for power transmission line L3゜ outage date and time, and for NQI 62-11-10 (
(Tuesday) from 9:00 to 15:00, data indicating that it is necessary to stop power transmission @L3 is registered in the abusive memory. In short, by adding knowledge about system reliability, knowledge about simultaneity of outage plans, and knowledge about consistency of outage plans and storing them in the knowledge storage means, higher quality support can be provided for adjustment of outage plans.

〔Effect of the invention〕

As explained above, according to the present invention, when a computer supports the adjustment of an outage plan, the impact of the outage plan on the power system and the relationship with other outage plans is inferred, and the validity of the outage plan is shown. Since this supports the person in charge of adjusting the outage plan, the person in charge can quickly make the correct adjustment even when adjusting an enormous and complicated outage plan.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the stop planning adjustment support device according to the present invention, and FIG. 2 shows an output side port to a CRT device.
Figure 3 is a flowchart of the process for outputting as shown in Figure 2, Figure 4 is the configuration of the outage plan data storage means, Figure 5 is the power system information, and Figure 6 is the power system data storage side. Actually, Figure 7 shows the details of the suspension plan! As an influence on the electric power system, for example, knowledge development is required to register the range of power outages and customer convenience in short-term memory, and Figure 8 shows knowledge development in which short-term memory is manipulated regarding the contents of short-term memory and secondary effects.
FIG. 9 shows the knowledge development of the relationship between the outage plan and other outage plans, FIG. 10 is a flowchart of the processing contents of step S31 shown in FIG. 3, and FIG. 11 shows the inference processing of step S33 shown in FIG. 3. In the flowchart, FIG. 12 shows knowledge about system reliability, FIG. 13 shows knowledge about simultaneity of outage plans, and FIG. 14 shows knowledge about consistency of outage plans. 1...Electronic computer 2...CRT device 11.
...Outage plan data storage means 12...Power system data storage means 13...Knowledge storage means 14...Inference means patent applicant Tokyo Electric Power Co., Inc. (and one other person) Representative patent attorney
Norio Ishii 5TART. 62-1l-10 (Tue) Due to power outage at customer C%,
Floor 2, m3. m4 suspension plans cannot be implemented at the same time. Perform Nn2. 62-1l-10 (Tue). Due to power outage for consumer C1, Nnl
The outage plan cannot be implemented on this day. Yang 1 date change 62-11-11゜62-1l-11 (Wed). Customer R experiences a power outage, but customer P is closed. The suspension plan for floor 1 can be implemented on this day. Q Eyu Guan 2 Ml Outage equipment: Transmission line L1 Outage date and time: 62-1l-10 (Tue), Work details:! 1. Snow accretion ring installation is complete.Customer: Consumer constant line: None Reserve line: Consumer C Priority 2B 9:00-15:00 Positive 2 Outage equipment: Transmission line L2 Outage date and time: 62-1l -10 (Tue), Work details: Replacement of insulators All outages Consumers: None Constant line: Consumer C Reserved days I: None Priority 2B Figure 4 9:00-15:00 Outage equipment 2 switch AI, 220 Outage date and time: 62-1l-10 (Tue), Work details: Inspection of switches Total outage Consumers: None Constant line: Consumer C Protection line: None Priority: C 10: 00-15: QC n4 Outage equipment: Switch BLL40 Shutdown date and time: 62-1l-10 (Tuesday), Work details: Relay inspection Total outage Consumer: None Constant line: Consumer C Backup line: None Priority: C 9:00-15:00 Kantsuji Figure 4 (b) Figure 5 Power system data 1 Equipment name: Transmission line L1 Equipment type: Transmission line connection equipment: Substation A AL210 ON demand 1 house c
CLOIOOFF Consumer D DLOIOON Substation B BL130 ON Permit value 2400MVA Risk prevention: Transmission line L3 Power system data 2 Equipment name 2 Consumer equipment type: Consumer connection equipment: Transmission MILL DLOIOON contract power crab 200MW Closed days: Weekly Special note on Wednesday: There was understanding and approval for the power outage work! stomach. Importance level: D Power system data 3 Equipment name: Switch AL220 Equipment type: Switch open/close status 20N (IF NcLx, shutdown equipment S1, shutdown plan mx with shutdown date and time T1 has total customer ■ 1 Due to a certain HEN NnX, T1 and 11 will have a power outage) (
IF Positive X1 outage equipment S1, outage meter 1i with outage plan for outage date and time T1 H
(For EN NnX, Jl is switched to T1 and Jl is switched to the protection line) (IF Nnx, outage facility S1, outage planned floor x with outage date and time T1 has customer equipment 1 of the protection line HEN positive x Figure 7 (IF mX1 to T1, Jl cannot switch to protection line) N11 to T2 for X2, Jl to protection line T1 and T2 are switched to T2 due to overlapping HEN mX2, and 11 becomes power outage) (
IF To T1 for mX1 implementing outage plan positive Delete HEN that causes a power outage to T2 and 11 (It is impossible to switch to T1 and 11 to the backup line due to NnX1) (Jl becomes a power outage to T2 due to ugly x) Delete 1mX1 to T1, 1
1 will have a power outage) (IF Nnx will cause a power outage on T1, Jl will have a power outage on T1)
is a holiday for consumer J1 HEN 11 is a holiday, so the shutdown meter IIIFkLx can be implemented) Figure 8 (IF mXl, shutdown equipment S1, equipment type of Sl that has a shutdown plan for shutdown date and time T1 is open/close) Sl is the switch of equipment S2, NnX2 is the switch of equipment S2, stop equipment S2, there is a stop plan with stop date and time T2. FUNCTION (carry out all switching during the Tl period) FUNCTION (power flow calculation) In which Jl is switched to the protection line FUNCTION (power flow calculation) Equipment S is overloaded HEN S is overloaded on T1 due to positive (to be put away) 1st
Figure 2, Figure 11

Claims (1)

[Claims] In an outage plan adjustment support device that supports the task of planning and coordinating outage plans for power systems, there is provided an outage plan data storage means for storing the contents of the outage plan, and an electric power system for storing the equipment constituting the power system and their connection states. a data storage means; a knowledge storage means storing knowledge for determining the validity of the outage plan; and a knowledge storage means that applies the knowledge of the knowledge storage means to the data of the outage plan data storage means to A stop plan adjustment support device comprising: a stop plan and an inference means for determining the validity of the stop plan based on its influence on the stop plan.