JP3083502B2 - Planning method for power system switchgear operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system switch operating procedure planning method that satisfies the reliability of a power system by selecting the best solution from a plurality of solutions.

[0002]

2. Description of the Related Art A conventional power system switch operating procedure planning method will be described with reference to FIG. FIG. 28 is, for example, Kasuya, Inoue, Oda, Iizuka, IEEJ Transactions B,
Vol. 109, No. 4, April 1989, pp. 177 to 1
It is a flowchart which shows the conventional electric power system switchgear operation procedure planning method shown by page 84 "Development of the accident recovery operation system in a local supply system."

In FIG. 28, "before-operation system" means a system state before starting a switch operation, and "after-operation system" means a system state to be reached after all switch operations are completed. It is. The determination as to whether or not one end of the switch is charged is performed on the assumption that the switch operation for which the procedure has been prepared has already been charged.

[0004] Next, the operation of the above-described conventional power system switch operating procedure planning method will be described with reference to FIG.

[0005] Step 201 of the flowchart of FIG.
, Each operation is extracted. That is, a switch having a different open / closed state is extracted by comparing the pre-operation system and the post-operation system.

[0006] Next, in step 202, of the switches extracted in step 201, an open procedure, that is, an operation procedure of the switch in the current “closed” state is created and simulated in a computer.

[0007] Next, in step 203, of the switches extracted in step 201, the switch operating procedure of closing the switch that is currently in the “open” state and has at least one end charged. Is created and simulated in the computer.

In step 204, this operation is repeated until all of the switch operations extracted in step 201 are completed, and an operation procedure form is created.

[0009]

In the above-mentioned conventional method of planning the operation of a power system switch, the reliability of the power system such as overload of equipment during operation of the switch and duration of power failure is not considered. There was a problem.

[0010] Further, in planning a switch operation procedure for shifting from a certain system state to the next cross section where the switch ON / OFF state is different, execution of a certain switch is permitted due to restrictions of the switch state. If not, there is a problem that an operation procedure cannot be created.

[0011] Further, in planning a switch operation procedure for shifting from a certain system state to the next cross section where the switch on / off state is different, the execution of a certain switch is restricted by the power flow state of the system. If not allowed, there is a problem that an operation procedure cannot be created.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for drafting an operation procedure of a power system switch which can satisfy the reliability of the power system in all switch operation sections. With the goal.

Further, the present invention has been made to solve the above-mentioned problem, and has proposed a switch operating procedure for shifting from a certain system state to the next cross section where the ON / OFF state of the switch is different. In doing so, if the operation of a certain switch is not allowed due to the restrictions of the switch state, the operation procedure can be created by adding a procedure to remove the restriction. The purpose is to obtain a planning method.

Further, the present invention has been made in order to solve the above-mentioned problems, and has proposed a switch operating procedure for shifting from a certain system state to the next cross section in which the ON / OFF state of the switch is different. In doing so, if the operation of a switch is not allowed due to the power flow constraints of the system, an operation procedure can be created by adding a procedure to remove the constraint. The aim is to get the method.

[0015]

According to a first aspect of the present invention , there is provided a power system switch operating procedure planning method for transitioning from one system configuration of a power system to another system configuration having a different ON / OFF state of a switch. Extracting a switch having a different ON / OFF state as an operation candidate switch by comparing a system configuration before operation and a system configuration of an operation target in a power system switch operation procedure planning method for planning an operation procedure of the switch Repeat the operation procedure draft of the extracted operation candidate switch for a predetermined number of times.
In the processing, the first operation procedure arranges the operations arbitrarily
In the second and subsequent operation procedures.
To change the order of one switch operation in the operation procedure
The step of making a plan and the execution of the planned operation procedure are simulated, and the evaluation function = the number of switch operations + the overload continuation time
Calculate the value of interval × α (constant) + power failure duration × β (constant)
A step that the predetermined number of times of obtaining the value of the evaluation function
Selecting the operation procedure plan with the smallest value of the evaluation function from the operation procedure plans.

According to a second aspect of the present invention , there is provided a power system switch operating procedure planning method, wherein the planning step includes the following.
Execution of the operation of the operation candidate switch is limited by the restriction of the switch state.
If not allowed, additional opening and closing to allow operation
The device operation is planned and inserted into the operation procedure plan .

According to a third aspect of the present invention , there is provided a power system switch operating procedure planning method, wherein the planning step includes the following.
Operation of the candidate switch is allowed due to power flow restrictions
If not, change the generator output to enable the operation.
The work is planned and inserted into the operation procedure plan .

According to a fourth aspect of the present invention , there is provided a power system switch operating procedure planning method, wherein the planning step includes the following.
Operation of the candidate switch is allowed due to power flow restrictions
If not, set up a load shedding operation to enable operation.
This is inserted into the operation procedure plan .

Further , in the power system switch operating procedure planning method according to claim 5 of the present invention, the planning step includes a step of operating when a certain operation candidate switch is not permitted to be operated due to restrictions on the switch state. Additional opening to allow
In addition to planning a switch operation and inserting the operation procedure into the proposed operation procedure, a generator output change operation is planned and inserted into the proposed operation procedure if the operation is not permitted due to the restriction of the power flow .

[0020]

[0021]

[0022]

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. A power system switch operating procedure planning method according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a flowchart showing a power system switch operating procedure planning method according to Embodiment 1 of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, step 101 is a means for extracting an operation candidate switch. In step 101, a system configuration before operation and a system configuration after operation (operation target) based on a database including equipment information of a power system such as a switch, and information on an operation state such as an on / off state of each equipment. And switches having different ON / OFF states are extracted as operation candidate switches.

Next, step 102 is a means for drafting a switch operating procedure. In this step 102, it is required to sequentially generate another kind of switch operation order, and in the first processing among the repetition processing, a method of determining the operation order according to the priorities as in the conventional method is applied. It is possible, and the second and subsequent processes are realized by exchanging the order of a certain switch operation with the order of another switch operation.

Next, step 103 is the same as step 1 described above.
This is a means for simulating and evaluating the operation procedure created in 02. In step 103, the operation of the switch is simulated sequentially, and the reliability of the power system is evaluated by power flow calculation.

Next, step 104 is a means for storing the best solution of the operating procedure which is sequentially planned. In this step 104, among the operation procedure plans created in the above step 102 and evaluated in the above step 103, the plans with the smallest evaluation function in the operation process of all switches are stored.

Step 105 is a means for determining the end of the processing. In step 105, if steps 102 to 104 have been repeated a predetermined number of times, the process is terminated. If not, the process returns to step 102 and branches to draft a new operation procedure. .

As described above, by repeating steps 102 to 104, the operation procedure is planned and the operation procedure is evaluated by simulated execution in order to obtain the best solution.
This makes it possible to plan an operation procedure in consideration of the reliability of the power system during the operation of the switch.

Embodiment 2 FIG. A method for drafting an operation procedure of a power system switch according to Embodiment 2 of the present invention will be described with reference to FIGS.

That is, a case where a more specific application example of the present invention is applied to a power system switch operation procedure planning problem for determining a switch operation procedure from a certain system to an operation target system where a system operation is performed. explain. In this application example, the reliability of the power system was evaluated with respect to the number of switch operations up to the operation target system, the overload duration of the entire switch operation process, and the power outage duration of the full switch operation process. An operation procedure that minimizes the evaluation function obtained by summing the items is drafted.

In each of the figures, reference numeral 10 denotes an upper system, 11 denotes a generator, 12 to 16 denote loads, and 17 to 23 denote branches. A thin solid line is an incoming branch (capacity 100), a thick solid line is an incoming branch (capacity 300), a dotted line is an off branch,
Arrows indicate load (load amount 100), G circles indicate generators (power generation XXX), squares indicate overload amounts, and triangles indicate switch operation.

In FIG. 2, (a) is a system before operation,
(B) shows the operation target system, and (c) shows the contents required for the operation.

In this application example, if the system state is changed in any operation procedure from the system state shown in FIG. 2A to the system state shown in FIG. It is a problem to determine whether the operation time can be reduced as much as possible after satisfying the conditions. FIG. 4A shows a branch 17 having a capacity of 100, a branch 18 having a capacity of 300, and a branch 1 from the upper system 10 and the generator 11.
9, five loads 12, a load 13, a load 14, a load 15, and a load 16 having a load amount 100 via the branch 22.
Is a system state in which power is supplied. FIG.
From the upper system 10 and the generator 11 via the branch 18, the branch 19, the branch 20, and the branch 23,
This is a system state in which power is supplied to one of the loads 12 to 16.

FIG. 2C shows the operation candidate switch extracted in step 101 of FIG. This problem is to determine the order in which the operations of the four switches are performed. Here, operation 1 is an operation to enter the branch 20, operation 2 is an operation to disconnect the branch 17, operation 3 is an operation to enter the branch 23, and operation 4 is an operation to disconnect the branch 22.

FIG. 3 shows a first operation procedure designed in step 102 of FIG. In the first switch operation procedure, the operation proceeds from “before operation” to “operation process 1” by operation 1 and then to “operation process 2” by operation 2; Thus, the procedure shifts to the “operation process system 3”, and finally, the operation 4 shifts to the “operation target system”. In the present embodiment, the first operation procedure is designed by arranging the operations arbitrarily. In the second and subsequent processes, the first
An operation procedure is planned by changing the order of one switch operation in the first operation procedure.

FIGS. 4 and 5 show the results obtained by simulating the first switch operating procedure in step 103 of FIG. 1 and evaluating the procedure. FIG. 4A shows the system before operation as in FIG. 2A, and FIGS. 4B, 4C, and 4D show the operation process system 1, the operation process system 2, and the operation process system. 3A and 3B, and FIG. 5A shows an operation target system similarly to FIG. 2B.

The evaluation is performed as shown in FIG.
The number of switch operations + overload duration × 100 + power failure duration × 100 ”is used as the evaluation function value. The “overload continuation time” is calculated by multiplying the “overload amount” by the “number of switch operations (continuation time)” while the overload continues. Further, the “power failure duration” is calculated by multiplying the “power failure amount” by the “number of switch operations” during the continuous power failure. Note that the generator output change amount (generator output change operation time) is very small and is not evaluated as the operation time. Here, the evaluation function value of the first switch operation procedure is: evaluation function value = 4 + 33 × 100 + 0 × 100 = 3304 because an overload occurs in the operation process system 1 between operation 1 and operation 2. Points.

Next, in step 104 of FIG. 1, the first switch operating procedure is stored as the best solution because the best solution has not yet been stored.

In step 105 of FIG. 1, it is determined whether the number of repetitions has reached a predetermined number of repetitions, and if it has, the process is terminated. In this embodiment, since the number of repetitions is three, the process proceeds to step 102 in FIG.

FIG. 6 shows a second switch operating procedure designed in step 102 of FIG. The second switch operation procedure is designed by replacing operation 4 of the first operation procedure before operation 1. In the second switch operation procedure, the operation 4 is performed from the “before operation system” and the operation is shifted to the “operation process system 1”. Then, the operation 1 is performed and the operation is shifted to the “operation process system 2”. Then, the procedure shifts to “operation process system 3”, and finally, the operation 3 is performed to shift to “operation target system”.

FIGS. 7 and 8 show the results of simulated execution of the second switch operation procedure in step 103 of FIG. 1 and evaluation. FIG. 7A shows the system before operation, as in FIG. 2A, and FIGS. 7B, 7C, and 7D show the operation process system 1, the operation process system 2, and the operation process system. 3A and 3B, and FIG. 8A shows an operation target system similarly to FIG. 2B.

As shown in FIG. 8 (b), the evaluation function value of the second switch operation procedure ranges from the operation process system 1 to the operation process system 3 because the load 16 is out of power. × 100 + 300 × 100 = 30004 points.

Next, in step 104 of FIG. 1, the evaluation of the second switch operation procedure is worse than that of the first switch operation procedure which is the best solution, so that it is not stored as the best solution.

In step 105 in FIG. 1, since the current number of repetitions is two, step 102 in FIG.
Move on to

FIG. 9 shows a third switch operating procedure designed in step 102 of FIG. The third switch operation procedure is designed by replacing operation 3 of the second operation procedure before operation 4. In the third switch operation procedure, the operation 3 is performed from the “before operation system” and the operation is shifted to the “operation process system 1”. Then, the operation 4 is performed and the operation is shifted to the “operation process system 2”. Then, the process proceeds to “operation process system 3”, and finally, the operation 2 is performed and the process proceeds to “operation target system”.

FIG. 10 and FIG. 11 show step 10 of FIG.
3 simulates the third switch operating procedure and shows the evaluation results. FIG. 10A shows the pre-operation system as in FIG. 2A, and FIGS. 10B, 10C, and 10D.
Are operation process system 1, operation process system 2, and operation process system 3.
11A shows an operation target system as in FIG. 2B.

As shown in FIG. 11B, the evaluation function value of the third switch operation procedure is: evaluation function value = 4 + 0 ×
100 + 0 × 100 = 4 points.

Next, in step 104 of FIG. 1, the third switch operating procedure is better evaluated than the first switch operating procedure, which is the best solution. Therefore, the third switch operating procedure is the best. The solution is saved.

In step 105 of FIG. 1, the current repetition number is three times, so the repetition processing ends. As described above, by combining the means for generating the operating procedure and the means for evaluating the operating procedure, the power system such as overload of equipment during switch operation and duration of power failure can be used without using operational priorities. Switch operation procedure in consideration of the reliability of the switch.

Embodiment 3 FIG. A method for drafting an operation procedure of a power system switch according to Embodiment 3 of the present invention will be described with reference to FIGS.

Embodiment 1 and Embodiment 2
Is to change the switch operation procedure necessary to shift from one system state to another system configuration with a different ON / OFF state of the switch, and to find the best switch operation procedure. If the operation procedure is not feasible due to the switch operation constraints, a new additional switch operation is planned and inserted into the switch operation procedure to satisfy the switch operation constraints. Can be made possible.

In the power system switch operating procedure planning problem of the second embodiment, the branch 22 and the branch 2 in FIG.
In the case of operating switch 3, if a switch operation restriction such that the branch 21 must be in the on state is added,
For example, the third switch operating procedure shown in FIGS. 9 to 11 does not satisfy the switch operating restrictions, and is a non-executable procedure.

Here, by inserting the additional switch operation shown in FIG. 12, it becomes possible to draft an operation procedure that satisfies the operation restrictions of the switch. In addition, the operation restriction of the switch corresponds to a restriction of the switch operation called an interlock in the electric power field. FIG. 12 shows an operation procedure in which the additional operation 1 is inserted before the operation 3 of the third switch operation procedure, and the additional operation 2 is inserted after the operation 4. The addition operation 1 is an input operation of the branch 21 and the addition operation 2 is a branch 2
This is a disconnection operation of 1. FIGS. 13, 14 and 15 show simulation execution examples of this operation procedure.

FIG. 12 shows a switch operating procedure designed in step 102 of FIG. In this switch operation procedure, the additional operation 1 is performed from the “before operation system”, the process is shifted to the “operation process system 1”, and then the operation 3 is performed to perform the “operation process system 2”.
, Then perform operation 4 to move to “operation process system 3”, then perform additional operation 2 and move to “operation process system 4”, further perform operation 1 and move to “operation process system 5” And
Finally, the operation 2 is performed and the procedure shifts to the “operation target system”.

FIGS. 13, 14 and 15 show the results of simulated execution of the above-mentioned switch operating procedure in step 103 of FIG. 1 and evaluation. FIG. 13A shows the pre-operation system similarly to FIG. 2A, and FIG. 13B, FIG.
(D), FIGS. 14 (a), (b) show the operation process system 1, the operation process system 2, the operation process system 3, the operation process system 4, and the operation process system 5, respectively, and FIG. FIG.
As in (b), the operation target system is shown.

The evaluation function values of the switch operating procedure are shown in FIG.
As shown in FIG. 5B, the evaluation function value = 6 + 0 × 100 +
0 × 100 = 6 points.

As described above, according to the third embodiment, the reliability of the electric power system in all the switch operation sections is satisfied, and from the state of one system to the next section in which the ON / OFF state of the switch is different. In planning a switch operation procedure for transition, if the execution of a switch operation is not allowed due to the restrictions of the switch state, create an operation procedure by adding a procedure to remove the restriction This makes it possible to formulate a power system switch operating procedure.

Embodiment 4 FIG. Embodiment 4 A method for drafting an operation procedure of a power system switch according to Embodiment 4 of the present invention will be described with reference to FIGS. 16 to 19.

Embodiment 1 and Embodiment 2
Is to change the switch operation procedure necessary to shift from one system state to another system configuration with a different ON / OFF state of the switch, and to find the best switch operation procedure. If the operation procedure cannot be executed due to the power flow restriction, the operation can be enabled by drafting a generator output change operation so as to satisfy the power flow restriction and inserting it into the switch operation procedure. The generator output changing operation can be determined by a method such as linear programming.

In the power system switch operation procedure planning problem of the second embodiment, the first switch operation procedure shown in FIGS. 3, 4, and 5 does not satisfy the power flow constraint in the system transition process. The procedure is not executable.

Here, by inserting the generator output changing operation shown in FIG. 16, it is possible to draft an operation procedure satisfying the power flow restriction. In the operation procedure of FIG. 16, an additional operation 3 is inserted before the operation 1 of the first switch operation procedure,
The operation procedure is such that an additional operation 4 is inserted after the operation 2. The additional operation 3 changes the output of the generator 11 from 100 to 150.
And the additional operation 4 changes the output of the generator 11 to 15
This is an operation for changing from 0 to 100. FIGS. 17, 18 and 19 show simulation execution examples of this operation procedure.

FIG. 16 shows a switch operating procedure designed in step 102 of FIG. In this switch operation procedure, the additional operation 3 is performed from the “before operation system”, and the process is shifted to the “operation process system 1”. Then, the operation 1 is performed and the “operation process system 2” is performed.
, Then perform operation 2 to move to “operation process system 3”, then perform additional operation 4 to move to “operation process system 4”, and further perform operation 3 to move to “operation process system 5” And
Finally, the operation 4 is performed to shift to the “operation target system”.

FIGS. 17, 18 and 19 show the results obtained by simulating the switch operating procedure in step 103 of FIG. 1 and evaluating the same. FIG. 17A shows the pre-operation system similarly to FIG. 2A, and FIGS. 17B, 17C, and 17C.
(D), FIGS. 18 (a) and (b) show the operation process system 1, the operation process system 2, the operation process system 3, the operation process system 4, and the operation process system 5, respectively, and FIG. FIG.
As in (b), the operation target system is shown.

The evaluation function value of the switch operating procedure is shown in FIG.
As shown in FIG. 9B, the evaluation function value = 4 + 0 × 100 +
0 × 100 = 4 points.

As described above, according to the fourth embodiment, the reliability of the power system in all the switch operation sections is satisfied, and the state of the switch is changed from one system state to the next cross section in which the ON / OFF state of the switch is different. When drafting a switch operation procedure for transition, if the execution of a switch is not permitted due to power flow constraints in the system, add a procedure to remove the constraint and create an operation procedure. Thereby, a power system switch operating procedure can be drafted.

Embodiment 5 A method for drafting an operation procedure of a power system switch according to Embodiment 5 of the present invention will be described with reference to FIGS.

Embodiment 1 and Embodiment 2
Is to change the switch operation procedure necessary to shift from one system state to another system configuration with a different ON / OFF state of the switch, and to find the best switch operation procedure. If the operation procedure cannot be performed due to the power flow restriction, a load shedding operation is planned to satisfy the power flow restriction,
Operation can be enabled by inserting it into the switch operation procedure. The load shedding operation can be determined by a technique such as linear programming.

In the power system switch operation procedure planning problem according to the second embodiment, the first switch operation procedure shown in FIGS. 3, 4, and 5 does not satisfy the power flow constraint in the system transfer process. This is an infeasible procedure.

Here, by inserting the load shedding operation shown in FIG. 20, it becomes possible to draft an operation procedure satisfying the power flow restriction. The operation procedure in FIG. 20 is an operation procedure in which an additional operation 5 is inserted before operation 1 of the first switch operation procedure, and an additional operation 6 is inserted after operation 2. The additional operation 5 is an operation of cutting off the load of the load 12 from 100 to 50, and the additional operation 6 is an operation of transmitting the load of the load 12 from 50 to 100. Note that a similar result is obtained for the load 13. 21, 22 and 23.
Fig. 3 shows a simulation execution example of this operation procedure.

FIG. 20 shows the switch operating procedure developed in step 102 of FIG. In this switch operation procedure, the additional operation 5 is performed from the “before operation system”, the process is shifted to the “operation process system 1”, and then the operation 1 is performed and the “operation process system 2” is performed.
And then perform operation 2 to move to “operation process system 3”, then perform additional operation 6 and move to “operation process system 4”, and further perform operation 3 to move to “operation process system 5”. And
Finally, the operation 4 is performed to shift to the “operation target system”.

FIG. 21, FIG. 22 and FIG. 23 show the results of simulating the switch operating procedure in step 103 of FIG. 1 and evaluating the same. FIG. 21 (a) shows the pre-operation system as in FIG. 2 (a), and FIGS. 21 (b), (c),
(D), FIGS. 22 (a) and 22 (b) show the operation process system 1, the operation process system 2, the operation process system 3, the operation process system 4, and the operation process system 5, respectively, and FIG. FIG.
As in (b), the operation target system is shown.

The evaluation function value of the switch operating procedure is shown in FIG.
As shown in FIG. 3B, the evaluation function value = 4 + 0 × 100 +
100 × 100 = 10004 points.

As described above, according to the fifth embodiment, the reliability of the power system in all switch operation sections is satisfied, and the state of the switch from one system state to the next cross section in which the ON / OFF state of the switch is different is changed. When drafting a switch operation procedure for transition, if the execution of a switch is not permitted due to power flow constraints in the system, add a procedure to remove the constraint and create an operation procedure. Thereby, a power system switch operating procedure can be drafted.

Embodiment 6 FIG. A method for drafting an operating procedure of a power system switch according to Embodiment 6 of the present invention will be described with reference to FIGS.

Embodiment 1 and Embodiment 2
Is to change the switch operation procedure necessary to shift from one system state to another system configuration with a different ON / OFF state of the switch, and to find the best switch operation procedure. If the operation procedure is not executable due to switch operation restrictions and power flow restrictions, additional switch operation, generator output change operation,
The operation can be enabled by designing the load shedding operation and inserting the necessary operation into the switch operation procedure.

In the power system switch operation procedure planning problem of the second embodiment, the first operation shown in FIG. 3, FIG. 4, and FIG. The switch operation procedure does not satisfy the switch operation restrictions and power flow restrictions during the system transition process, and is an infeasible procedure.

Here, as shown in FIG. 24, first, an additional operation 3 is inserted before operation 1 of the first switch operating procedure, and an additional operation 3 is added after operation 2 so as to satisfy the switch operation restrictions. Insert work 4. Next, an additional operation 1 is inserted before the operation 3 and an additional operation 2 is performed after the operation 4 so as to satisfy the power flow constraint.
, It becomes possible to draft an operation procedure that satisfies the switch operation restrictions and power flow restrictions.

The addition operation 1 is an operation for entering the branch 21, and the addition operation 2 is an operation for turning off the branch 21. The additional operation 3 is an operation for changing the output of the generator 11 from 100 to 150, and the additional operation 4 is an operation for changing the output of the generator 11 from 150 to 100.
It is an operation to return to.

The load 12 or the load 13 is set to 100
The operation procedure that satisfies the power flow restriction can be drafted by inserting a load shedding operation that cuts off power from 50 to 50. Gets worse. For this reason, here, the operation procedure in which the generator output change operation procedure with good evaluation is inserted is selected. FIG. 25, FIG.
27 shows an example of simulated execution of this operation procedure.

FIG. 24 shows the switch operating procedure developed in step 102 of FIG. In this switch operation procedure, the additional operation 3 is performed from the “before operation system”, and the process is shifted to the “operation process system 1”. Then, the operation 1 is performed and the “operation process system 2” is performed.
, And then perform operation 2 to move to “operation process system 3”, then perform additional operation 4 and move to “operation process system 4”, and then perform additional operation 1 and perform “operation process system 5”. , And then perform operation 3 to move to “operation process system 6”,
Next, the operation 4 is performed to shift to the “operation process system 7”, and finally the additional operation 2 is performed to shift to the “operation target system”.

FIG. 25, FIG. 26, and FIG. 27 show the results of simulated execution of the switch operating procedure in step 103 of FIG. 1 and evaluation. FIG. 25 (a) shows the pre-operation system similarly to FIG. 2 (a), and FIG. 25 (b), (c),
(D), FIGS. 26 (a), (b), (c) and (d) show the operation process system 1, the operation process system 2, the operation process system 3, the operation process system 4, the operation process system 5, and the operation process. FIG. 27A shows the system 6 and the operation process system 7, respectively.
Similarly, the operation target system is shown.

The evaluation function value of the switch operating procedure is shown in FIG.
As shown in FIG. 7B, the evaluation function value = 6 + 0 × 100 +
0 × 100 = 6 points.

As described above, according to the sixth embodiment, the reliability of the power system in all the switch operation sections is satisfied, and the state of the switch is changed from one system state to the next cross section in which the ON / OFF state of the switch is different. In planning a switch operation procedure for transition, if the execution of a switch operation is not permitted due to the switch state restrictions, and if the power flow restriction of the system is not allowed, the procedure for releasing the restrictions By creating an operating procedure by adding the above, a power system switch operating procedure can be drafted.

[0085]

As described above, the power system switch operating procedure planning method according to claim 1 of the present invention shifts from one system mode of the power system to another system mode in which the ON / OFF state of the switch is different. In the power system switch operation procedure planning method for planning the operation procedure of the switch for the purpose, the system configuration before operation and the system configuration of the operation target are compared, and switches having different ON / OFF states are extracted as operation candidate switches. Step and the extracted operation procedure proposed for the operation candidate switch are repeated a predetermined number of times.
In the return operation, the first operation procedure is optional.
It is planned by arranging, and in the second and subsequent operation procedures
Change the order of one switch operation in the previous operation procedure
And simulates executing the steps of planning, the said drafted operating procedures proposed by the evaluation function = switch operation number + overload
Duration × α (constant) + Power failure duration × β (constant)
Determining a, the plant was determined value of the evaluation function
Selecting an operation procedure plan having the smallest value of the evaluation function from among the fixed number of operation procedure plans, thereby satisfying the reliability of the power system in all switch operation sections. It has the effect of being able to.

Further, in the power system switch operating procedure planning method according to claim 2 of the present invention, as described above, the planning step includes executing the operation of a certain operation candidate switch.
Operation is allowed if it is not allowed due to restrictions on the closed state.
Additional switch operation to perform the
Since the input, line the creation of operating procedures that can be released the constraint
There is an effect that it is possible cormorant.

[0087] Further, the power system switch operating procedure planning method according to claim 3 of the present invention, as described above, wherein
The planning step is when the operation of a switch
If operation is not permitted due to flow restrictions,
A generator output change operation and insert it into the proposed operation procedure.
Since that an effect that it is the this <br/> of making operation procedures that can release the restriction.

[0088] Further, the power system switch operating procedure planning method according to claim 4 of the present invention, as described above, wherein
The planning step is when the operation of a switch
If operation is not permitted due to flow restrictions,
Since the load shedding operation is planned and inserted into the operation procedure plan, it is possible to create an operation procedure that can release the restriction .

Further , in the power system switch operation procedure planning method according to claim 5 of the present invention, as described above, the planning step is performed when the operation of a certain operation candidate switch is performed based on the restriction of the switch state. Operation allowed if not allowed
Additional switch operation to make the operation procedure draft
It is inserted, if not acceptable from the power flow restriction, because insertion into the operating procedure proposed by formulating the generator output change operation, an effect that it is possible to create operating procedure can release the restriction.

[0090]

[0091]

[0092]

[Brief description of the drawings]

FIG. 1 is a flowchart showing a power system switch operating procedure planning method according to Embodiment 1 of the present invention.

FIG. 2 is a diagram illustrating a pre-operation system and an operation target system for explaining a problem of drafting an operation procedure of a power system switch according to Embodiment 2 of the present invention;

FIG. 3 is a diagram illustrating a first switch operating procedure repeatedly in a power system switch operating procedure planning method according to Embodiment 2 of the present invention;

FIG. 4 is a diagram illustrating a simulation execution example of a first switch operation procedure repeatedly in a power system switch operation procedure planning method according to Embodiment 2 of the present invention;

FIG. 5 is a diagram illustrating a simulation execution example of a first switch operation procedure repeatedly in a power system switch operation procedure planning method according to Embodiment 2 of the present invention;

FIG. 6 is a diagram illustrating a switch operation procedure for a second time in a power system switch operation procedure planning method according to Embodiment 2 of the present invention;

FIG. 7 is a diagram illustrating a simulation execution example of a second switch operation procedure repeatedly in the power system switch operation procedure planning method according to the second embodiment of the present invention;

FIG. 8 is a diagram illustrating a simulation execution example of a second switch operation procedure repeatedly in the power system switch operation procedure planning method according to the second embodiment of the present invention;

FIG. 9 is a diagram for explaining a third switch operating procedure repeatedly in the power system switch operating procedure planning method according to Embodiment 2 of the present invention;

FIG. 10 is a diagram illustrating a simulation execution example of a third switch operation procedure repeatedly in the power system switch operation procedure planning method according to the second embodiment of the present invention;

FIG. 11 is a diagram illustrating a simulation execution example of a third switch operation procedure that is repeatedly performed in the power system switch operation procedure planning method according to the second embodiment of the present invention;

FIG. 12 is a diagram for explaining a third switch operation procedure that is repeated when an additional switch operation is inserted in the power system switch operation procedure planning method according to Embodiment 3 of the present invention;

FIG. 13 is a diagram illustrating a simulation execution example of a third switch operation procedure that is repeated when an additional switch operation is inserted in the power system switch operation procedure planning method according to Embodiment 3 of the present invention;

FIG. 14 is a diagram illustrating a simulation execution example of a third switch operation procedure that is repeated when an additional switch operation is inserted in the power system switch operation procedure planning method according to Embodiment 3 of the present invention;

FIG. 15 is a diagram illustrating an example of simulated execution of a third switch operation procedure in which an additional switch operation is inserted in the power system switch operation procedure planning method according to Embodiment 3 of the present invention;

FIG. 16 is a view for explaining a first-time switch operating procedure in which a generator output change operation is inserted in a power system switch operating procedure planning method according to Embodiment 4 of the present invention;

FIG. 17 is a diagram illustrating a simulation execution example of a first switch operation procedure repeatedly in which a generator output change operation is inserted in the power system switch operation procedure planning method according to Embodiment 4 of the present invention;

FIG. 18 is a diagram illustrating a simulation execution example of a first-time switch operation procedure in which a generator output change operation is inserted in a power system switch operation procedure planning method according to Embodiment 4 of the present invention;

FIG. 19 is a diagram for explaining a simulation execution example of a first-time switch operation procedure in which a generator output change operation is inserted in a power system switch operation procedure planning method according to Embodiment 4 of the present invention;

FIG. 20 is a diagram illustrating a first switching switch operation procedure in which a load shedding operation is inserted in a power system switch operation procedure planning method according to Embodiment 5 of the present invention;

FIG. 21 is a diagram illustrating an example of simulated execution of the first repetitive switch operating procedure in which a load shedding operation is inserted in the power system switch operating procedure planning method according to Embodiment 5 of the present invention;

FIG. 22 is a diagram illustrating a simulation execution example of a first switch operating procedure that is repeated for the first time in which a load shedding operation is inserted in the power system switch operating procedure planning method according to Embodiment 5 of the present invention;

FIG. 23 is a diagram illustrating a simulation execution example of a first switch operation procedure in which a load shedding operation is inserted in a power system switch operation procedure planning method according to Embodiment 5 of the present invention;

FIG. 24 is a diagram for explaining a first switch operation procedure that is repeated in which an additional switch operation and a generator output change operation are inserted in the power system switch operation procedure planning method according to the sixth embodiment of the present invention. .

FIG. 25 illustrates an example of simulated execution of a first switch operation procedure in which an additional switch operation and a generator output change operation are inserted in the power system switch operation procedure planning method according to the sixth embodiment of the present invention. FIG.

FIG. 26 illustrates an example of simulated execution of a first switch operation procedure in which an additional switch operation and a generator output change operation are inserted in the power system switch operation procedure planning method according to the sixth embodiment of the present invention. FIG.

FIG. 27 illustrates an example of simulated execution of a first switch operation procedure in which an additional switch operation and a generator output change operation are inserted in the power system switch operation procedure planning method according to the sixth embodiment of the present invention. FIG.

FIG. 28 is a flowchart showing a conventional power system switch operating procedure planning method.

[Explanation of symbols]

10 upper system, 11 generator, 12 load, 13 load, 14 load, 15 load, 16 load, 17 branch, 18 branch, 19 branch, 20 branch,
21 branches, 22 branches, 23 branches.

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

Claims (5)

(57) [Claims] In a power system switch operating procedure planning method for preparing a switch operating procedure for shifting from one system mode of a power system to another system mode in which the ON / OFF state of the switch is different, extracting different switch of comparing the system configuration of the system forms the operating target Nyusetsu state as candidate operation switch, the operation procedure proposed candidate operation switch that the extracted, predetermined number of times
In the repetitive processing of
The second and subsequent operating procedures
Then, the order of one switch operation of the last operation procedure was changed.
A step of planning by obtaining, by simulating execution of the planning has been operating procedure proposed evaluation function =
Number of switch operations + overload duration × α (constant) + power failure continuation
Calculating a value of time × β (constant); and determining the value of the evaluation function for the predetermined number of operation procedure proposals.
Selecting an operation procedure plan with the smallest value of the evaluation function from among them. 2. The method according to claim 1, wherein the planning step includes opening and closing a certain operation candidate.
Execution of switch operation is not allowed due to switch state constraints
If necessary, plan additional switch operation to enable operation
2. The method according to claim 1, wherein the method is inserted into the operation procedure plan. 3. The method according to claim 1, wherein the planning step includes opening and closing a certain operation candidate.
If the operation of the vessel is not permitted due to tidal restrictions,
Planning generator output change operation to enable operation
2. The method according to claim 1, wherein the method is inserted into an operation procedure plan . 4. The planning step includes opening and closing a certain operation candidate.
If the operation of the vessel is not permitted due to tidal restrictions,
Establish a load shedding operation to enable operation and
2. The method according to claim 1, wherein the procedure is inserted into a schedule. Wherein said planning step, if the execution of the operation of a certain candidate operation switch is not allowed from the constraints of the switch state, drafting additional switch operation to enable operation
Is inserted to the operation procedure proposed by, if not acceptable from the power flow restriction, the power of claim 1, wherein the insertion in the <br/> operating procedure proposed by formulating the generator output change operation How to plan system switchgear operation procedures.