System and method for supporting the creation of work stoppage plans in power grids.

Abstract

When formulating a work stoppage plan for the power grid, it is difficult to consider whether it is possible to stop all combinations of work simultaneously. Furthermore, arbitrarily reducing combinations of work reduces the explainability and indicators of the work stoppage plan. [Solution] A power grid work stoppage plan creation support system comprising at least a processing unit and a memory unit takes work list data including one or more tasks, grid configuration data, and future forecast scenario data including future demand forecasts and renewable energy output forecasts as inputs. The processing unit uses the data from the memory unit to extract equipment whose power flow changes by a specified amount when the equipment is stopped due to work, calculates the power flow sensitivity for the extracted equipment, extracts the most severe conditions for the objective function or constraint function for the work stoppage plan using the power flow sensitivity, calculates the value of the objective function or constraint function when the work is performed according to the most severe conditions, and determines the importance of performing the work from the calculated value.

Claims

1. A power system work stoppage plan creation support system comprising at least a processing unit and a memory unit, The storage unit stores work list data including information about work in one or more power systems, system configuration data including information about equipment belonging to the power system, and future forecast scenario data including forecasts of power demand and renewable energy output for loads at future dates and times. The processing unit reads each of the data from the storage unit, A first function is executed to extract from the aforementioned work list data and the aforementioned system configuration data the equipment whose power flow changes by a specified amount when the equipment is stopped due to the aforementioned work, A second function is performed to calculate the tidal current sensitivity for the extracted equipment. A third function is performed to extract from the future prediction scenario data the most severe conditions under which the objective function or constraint function for the work stoppage plan is most severely affected, using the calculated tidal current sensitivity. A fourth function is executed to calculate the objective function or constraint function when the work is performed according to the extracted most severe conditions. A fifth function is performed to determine the importance of the operation to the power system when the operation is carried out, based on the calculated value of the objective function or the constraint function. A work stoppage plan creation support system characterized by the following features.

2. A work stoppage plan creation support system according to claim 1, The processing unit performs a sixth function, which extracts and groups the tasks having the same importance level. The seventh function is executed to generate combinations of tasks that may stop simultaneously for each group of the aforementioned grouped tasks. A work stoppage plan creation support system characterized by the following features.

3. A work stoppage plan creation support system according to claim 2, The processing unit determines the possibility of stopping a combination of tasks that may stop simultaneously within the same group generated, based on the value of the constraint function when such combinations of tasks are stopped. If such stopping is possible, it executes a task stop planning function to determine a task stop plan based on the objective function for each combination of tasks. A work stoppage plan creation support system characterized by the following features.

4. A work stoppage plan creation support system according to claim 2 or 3, The processing unit searches for equipment that is connected in series with the equipment targeted for the task and has no other equipment connected in parallel with it, based on the connection relationship with the equipment targeted for the task, extracts cases where the searched equipment is included as equipment targeted for other tasks, and performs a connection relationship grouping function to group tasks that have a connection relationship with the extracted equipment and have equipment targeted for the task. A work stoppage plan creation support system characterized by the following features.

5. A work stoppage plan creation support system according to claim 4, The processing unit executes a task extraction function to extract tasks that involve equipment affected by the same power system switching operation, based on the connection relationships of the equipment subject to the task and the equipment included in the configuration of the power system that is subject to switching of the power system. A work stoppage plan creation support system characterized by the following features.

6. A work stoppage plan creation support system according to claim 1 or 3, The processing unit retains and displays the execution result of the fifth function or the work stop planning function. A work stoppage plan creation support system characterized by the following features.

7. A work stoppage plan creation support system according to claim 4, The processing unit is characterized by holding and displaying the execution result of the connection relationship grouping function, and is used to create a work stop plan support system.

8. A method for supporting the creation of work stoppage plans in power systems, The first step is to extract equipment from work list data including information on work in one or more power systems and system configuration data including information on equipment belonging to the power system, the equipment whose power flow changes by a specified amount when the equipment is stopped due to the work; the second step is to calculate the power flow sensitivity for the extracted equipment; the third step is to use the calculated power flow sensitivity to extract the most severe conditions in which the objective function or constraint function for the work stoppage plan is most severely affected from future forecast scenario data including power demand forecasts and renewable energy output forecasts for future dates and times; the fourth step is to calculate the objective function or constraint function when the work is performed according to the extracted most severe conditions; and the fifth step is to determine the importance of the work to the power system when the work is performed based on the calculated objective function or constraint function. A method for supporting the creation of work stoppage plans, which includes the following:

9. A method for supporting the creation of a work stoppage plan according to claim 8, A sixth step of extracting and grouping tasks that have the same importance, and a seventh step of generating combinations of tasks that may stop simultaneously for each group of the grouped tasks. A method for supporting the creation of work stoppage plans, further comprising the features mentioned above.

10. A method for supporting the creation of a work stoppage plan according to claim 9, An eighth step of determining the possibility of stopping a combination of tasks that may stop simultaneously within the same group generated, based on the value of the constraint function when such combination of tasks is stopped, and a ninth step of determining a task stop plan based on the objective function for each combination of tasks if such stopping is possible. A method for supporting the creation of work stoppage plans, further comprising the features mentioned above.

11. A method for supporting the creation of a work stoppage plan according to claim 9 or 10, A connection relationship grouping step comprising: searching for equipment that is connected in series with the equipment targeted for the aforementioned work and has no other equipment connected in parallel with it, based on the connection relationship with the equipment targeted for the aforementioned work; extracting cases where the searched equipment is included as equipment targeted for other work; and grouping work that has a connection relationship with the extracted equipment and has equipment targeted for the aforementioned work. A method for supporting the creation of work stoppage plans, which also includes a work stoppage plan creation support method.

12. A method for creating a work stop plan according to claim 11, A task extraction step that extracts tasks that have equipment affected by the same power system switching operation, based on the connection relationships of the equipment subject to the aforementioned tasks and the equipment included in the configuration of the power system that is subject to switching of the power system. A method for supporting the creation of work stoppage plans, further comprising the features mentioned above.

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