JP3247257B2 - Power system work stop plan support equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop plan support apparatus for supporting the planning and adjustment of a stop plan for temporarily stopping an electric power system to perform work.

[0002]

2. Description of the Related Art In order to perform a work while temporarily stopping a power system, it is necessary to sufficiently consider operational efficiency and stability of the power system and to perform the operation efficiently. Currently, suspension planning is performed manually by skilled suspension planners, or based on the knowledge required for suspension planning, the suspension planning is performed by a suspension planning support device that makes intelligent inferences. Created (“Development of work blackout planning system”) 89
IEEJ Power Technology Study Group PE-89-20).

[0003]

In the conventional work stoppage planning support apparatus, whether or not to stop the equipment is determined in consideration of the reliability of the power system when the equipment is stopped. Did not consider. For this reason, when the urgency of the work to be adjusted by the operator is high, the work stoppage is performed even if the reliability is somewhat low. Is not designed, the stop date is moved only because the reliability exceeds the threshold, and there is a disadvantage that the adjustment result is inflexible and does not fit the operator's feeling.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. A first object of the present invention is to judge whether or not a stop is possible by considering both the reliability of a system and the urgency of work.
An object of the present invention is to provide a work suspension plan support device that can obtain a highly flexible adjustment result that matches the sense of the operator.

It is a second object of the present invention to provide a work stoppage planning support apparatus which can change the threshold value of stoppage availability according to the operator's feeling. A third object is to display the adjustment result together with the urgency of the work and the reliability of the system so that the operator can know the appropriateness of the equipment stop, thereby obtaining a sense of trust from the operator. It is an object of the present invention to obtain a stop plan support device that enables an adjustment adapted to a user's sense.

[0006]

In order to solve the above-mentioned problems, according to the first and second aspects of the present invention, as shown in FIG. 1, a file 2 for storing power system facility stop request data is provided. Means 4 for grasping the system reliability when the power equipment is stopped using the data from the file 3 for storing the system equipment data, the urgency of the stop work stored in the stop request data file 2, A stop / non-stop determination unit 7 that determines whether or not to stop using the system facility data stored in the facility data file 3, the reliability of the system reliability file 5 and the threshold 6 for determining whether or not stop is possible, and determines that stop is not possible. In this case, the apparatus comprises a schedule adjusting means 8 for adjusting the schedule of the stop request and an adjustment result output means 9 for outputting the result of the schedule adjustment to the output device 10.

The invention according to claim 3 is as shown in FIG. 2, except that an input / output device 11 in which an operator can freely change a threshold value is provided in place of the output device 10 in FIG. It is the same as Claims 1 and 2. According to a fourth aspect of the present invention, in addition to the stop adjustment result, the system reliability and the urgency of the operation are output together.

[0008]

According to the first aspect of the present invention, the stop request data of the power system equipment input to the computer is determined based on the system equipment data, the system reliability, the urgency of the stop work, and the threshold value, and whether or not the stop is possible is determined. As a result, if possible, the result is output to the output device 10 as an adjustment result. If the result of the determination as to whether or not the stop is possible is negative, the work day is adjusted, and the result is output to the output device 10 in FIG. According to the first aspect of the present invention, it is possible to formulate a work suspension plan in consideration of both the urgency of work and the reliability of the system.

According to a second aspect of the present invention, it is determined whether or not to stop the stop request data by fuzzy inference from the system reliability and the urgency of the stop operation. According to the second aspect of the present invention, by applying fuzzy inference when considering both the urgency of work and the system reliability, the subjectivity of the operator can be taken in.

According to a third aspect of the present invention, the input / output device 11 shown in FIG.
The operator can change the setting of the threshold value for determining whether or not to stop by input from. According to the third aspect of the present invention, the criterion of the operator can be easily adopted by changing the threshold value.

According to a fourth aspect of the present invention, the adjustment result is further displayed on the output device 10 of FIG. 1 or the input / output device 11 of FIG. According to the fourth aspect of the present invention, since the urgency of the work and the system reliability are presented, the operator can formulate the work suspension plan with ease.

[0012]

FIG. 1 is a diagram showing an embodiment of a power system work stoppage planning support device according to the present invention, which comprises an electronic computer 1 and an output device 10. This computer 1 is composed of the following devices and function realizing means.
That is, reference numeral 2 denotes a file for storing stop request data of the power system equipment. In the stop request data 2, four factors of the stop equipment, the stop request date, the work content, and the urgency of the work are defined. Reference numeral 3 denotes a system facility data file, which stores connection relations between facilities constituting the power system, facility capacity, power generation amount, load values, and the like. Reference numeral 4 denotes a means for grasping the system reliability when the equipment is stopped, and reference numeral 5 denotes a system reliability file for storing the result of checking the system reliability by the grasp means 4. Reference numeral 6 denotes a threshold value for judging whether or not to stop, 7 denotes system facility data, system reliability, operation urgency, and a stop / non-judgment means for judging whether or not to stop the power system using the threshold value. 3 is a schedule adjusting means for adjusting the schedule by inputting the output of the stop possibility determining means and the output of the stop possibility determining means. An example of the schedule adjustment will be described below with reference to FIG. In FIG. 2, the generator G has three transmission lines (A
Line, B line, and C line). Now, considering the expected load on the A-line stop request day when the A-line is stopped, it is assumed that the load ratio of the B-line and the C-line exceeds 60% of the threshold value. The schedule adjusting means 8 determines the load ratio of the B line and the C line when the A line is stopped near the A line stop request date based on the estimated load value protected by the system equipment data file 3.
Search for a day below 60% and adjust that day as the A-line stop date. 9 is an adjustment result output means, and 10 is an output device. The output device 10 may be a CRT, a liquid crystal display, a typewriter, an audio output device, or a combination thereof.

Next, the operation of this embodiment will be described with reference to FIGS. 1, 2, 3 and 4. FIG. First, an example of system reliability is defined using FIG. In FIG. 2, line A is used as a work stop facility, and before line A is stopped, lines A, B, and C each apply a total of 120 MW of electric power of 40 MW from generators D, E, and F to load G.
It is assumed that power is transmitted to In order to stop the A line while maintaining this power transmission state, the B line and the C line must transmit 60 MW each. The system reliability in this state is determined based on whether or not the healthy line, which has not been powered down when either the B line or the C line is powered down due to an accident, is overloaded. If an overload does not occur in this state, the system reliability is determined to be high, and if an overload occurs, the system reliability is determined to be low. The load factor of the equipment is defined as (Equation 1).

[0014]

(Equation 1) As shown in Fig. 2, when power is transmitted through two routes, line B and line C, with the same installed capacity, if the load factor is, for example, 50% or less, it is determined that the system reliability is high. It is judged that the system reliability is low because the other transmission line is overloaded due to the transmission line accident.

Hereinafter, the system reliability will be represented by using the load factor of the facility. FIG. 3 shows the operation of the present invention in the form of a processing flow. Hereinafter, description will be given along the flow of FIG. The work stop request data is input to the computer 1 of FIG. Step S1 is system reliability grasping means 4
Of the process. In step S1, the load factor of the equipment is calculated using (Equation 1) from the information of the system equipment data file 3 storing the state of the system on the work stop request date and the stopped equipment. The calculated load factor is stored in the system reliability file 5 in step S2. Step S3 represents the process of the stoppage availability determination means 7. This step S3
Then, it is determined whether or not a stop request is possible based on the urgency of work in the work stop request data, the load factor of the equipment, and the threshold value 6.
The threshold value in this case is a value indicating that work stoppage is permitted if the value is equal to or less than this value, and not permitted if the value is exceeded. FIG. 4 shows an example of this threshold value. For example, if the urgency of the stop request for the facility A line is "urgent", the highest load factor in other facilities when the facility A line is stopped is 60% or less.
If not, it is determined to be no. FIG. 4 shows that the threshold value changes according to the degree of urgency, but the degree of urgency can be set variously. If it is determined to be acceptable in step S3, a command for performing the work on the requested date is output to the output device 10 from the adjustment result output means in step S5.
If it is not determined in step S3, the schedule is adjusted by the schedule adjusting means in step S4, and the result is output to the output device 10 by the adjustment result output means in step S5.

As described above, according to the present embodiment, it is possible to formulate a work suspension plan in consideration of both the urgency of work and the reliability of the system. Next, an embodiment of the invention described in claim 2 will be described.

The configuration of the present embodiment is the same as that of FIG. 1 when expressed by a function realizing means, but a part of the flowchart is different. That is, in the present embodiment, steps S1 and S2 are the same as those in the first aspect, but the processing in the processing step S3 of the stop possibility determination means 7 is different. 5 and 6 show the differences.
This will be described below. Recognition of the degree of urgency and system reliability involves an ambiguous assessment of the operator. Also, there is ambiguity in determining whether or not to implement. The urgency, the load factor, and the degree of availability are represented by membership functions as shown in FIG. FIG. 6 shows an example of a fuzzy rule for deciding whether or not to perform the operation in consideration of the urgency and reliability of the work. In step S3, the membership function of FIG. 5 and the fuzzy rule of FIG. 6 are applied to the equipment having the lowest system reliability,
Performs fuzzy operation. If the degree of feasibility when the result of the fuzzy operation is defuzzified is equal to or less than the threshold, it is determined that feasibility is feasible. The threshold value in this case corresponds to the degree of feasibility in FIG. 5 and is a value from 0 to 100. If it is larger than the threshold value, it is determined that the execution is not performed, and the process proceeds to the schedule adjustment in step S4. The processes in steps S4 and S5 are the same as those in the first aspect.

According to this embodiment, when formulating an action stop plan in consideration of both the urgency of work and the system reliability,
The operator's subjectivity can be taken in by fuzzy inference.

Next, an embodiment of the present invention will be described with reference to FIG. In the case of the present embodiment, all components other than the input / output device 11 are the same as in the first and second aspects. The operations of steps S1 to S5 in FIG. 3 are the same as in the first and second aspects. The only difference of the present invention is that the threshold value 6 is set / changed via the input / output device 11. That is, the threshold value shown in FIG. 4 is set by the operator using the input / output device 11 in accordance with the senses of the user, such as lowering the summer temperature when the outside air temperature is high and setting it higher during the winter time when the outside air temperature is low. be able to.

Next, a fourth embodiment will be described. The block diagram of this embodiment is similar to the first, second, and third aspects. In the present embodiment, steps S1 to S4 in the flowchart shown in FIG. 8 are the same as in claims 1, 2, and 3. The difference from the other embodiments is that the adjustment result output means outputs not only the adjustment result but also the equipment with the highest load factor and its load factor as indices of the urgency of the work and the system reliability in step S5. . According to this embodiment, the operator can determine the validity of the suspension, and can formulate the work suspension plan with confidence.

[0021]

As described above, according to the present invention, it is possible to formulate a highly flexible plan that takes into account the urgency of work that the operator is actually operating, and results in adapting to the operator's sense. Can be obtained. By adding fuzzy inference, it is also possible to make plans that incorporate the operator's subjectivity.

Furthermore, the ability to change the threshold value allows the operator's feeling to be taken in. Furthermore, since the urgency of the work and the system reliability are presented according to the work stoppage result, the operator can understand the validity of the stoppage, and the operator can work with peace of mind.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a work suspension plan support device according to the first, second, and third aspects of the invention.

FIG. 2 is an example of an electric power system diagram.

FIG. 3 is a processing flowchart for explaining the invention according to claims 1, 2 and 3;

FIG. 4 is a diagram illustrating a threshold.

FIG. 5 is a view for explaining a fuzzy membership function of the embodiment according to claim 2;

FIG. 6 is a diagram showing an example of a fuzzy rule of the embodiment according to claim 2;

FIG. 7 is a configuration diagram of a work suspension plan support device according to the invention according to claim 3;

FIG. 8 is a flowchart for explaining the invention according to claim 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Computer 2 ... Stop request data file 3 ... System equipment data file 4 ... System reliability grasp means 5 ... System reliability file 6 ... Threshold value, 7 ... Stop possibility determination means 8 ... Schedule adjustment means 9 ... Adjustment result Output means 10… Output device 11… Input / output device

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02J 3/00-5/00

Claims (4)

(57) [Claims] 1. A stop plan support device for creating a stop plan for a power system, a means for storing power system stop request data, a means for storing power system equipment data, and the stop request data and the system equipment data. Means for grasping the system reliability by using the system reliability, and whether or not the facility can be stopped based on the system reliability obtained by the grasping means, the urgency of the work defined in the stop request data, and the threshold value for determining whether or not the facility can be stopped. , A means for performing a schedule adjustment on a stoppable date in response to a stop request determined to be unstoppable, and an output device for outputting the adjustment result. Work suspension plan support device. 2. The power system work stop plan according to claim 1, wherein whether or not the stop is possible is determined by fuzzy inference from the system reliability and the urgency of the work defined in the stop request data. Support equipment. 3. An apparatus according to claim 1, further comprising an input device that allows an operator to set a threshold value for determining whether or not to stop the work. 4. The power system work stop plan support according to claim 1, wherein the system reliability and the urgency of the work are displayed together with the result of the stop adjustment. apparatus.