Power System Constraint Screening for Real-Time Grid Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power system stabilization systems face challenges in achieving real-time stabilization as the scale of the power system increases, due to prolonged calculation times even with existing optimization methods, and the process of identifying unnecessary constraints is cumbersome.
Innovation Solution
A power system stabilization system that generates a constraint condition list based on a power system model, state, and event list, using a constraint screening parameter to screen unnecessary conditions, reducing the matrix size and enabling faster preventive control calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of combinations of objects to be monitored and the number of assumed fault cases are increased to improve system coverage, then the number of constraint conditions becomes enormous, but the calculation time becomes excessively long
Solution Approach 1:
The patent extracts and removes unnecessary constraint conditions from the optimization problem. By identifying and eliminating redundant constraints that do not contribute to the optimal solution, the system maintains comprehensive monitoring coverage while significantly reducing the computational burden and calculation time required for preventive control.
Solution Approach 2:
The patent uses sensitivity analysis to identify constraint conditions that have negligible impact on the objective function. These redundant constraints are then removed from the optimization problem, allowing the system to maintain thorough system coverage through the remaining essential constraints while achieving faster calculation speeds.
2Quantity of substance
If the scale of the power system is increased to improve system capacity, then the problem size increases, but the calculation time becomes longer and real-time stabilization becomes difficult
Solution Approach 1:
The patent extracts unnecessary constraint conditions from large-scale power system optimization problems. By removing redundant constraints that do not significantly impact the optimal solution, the system can handle larger power system scales while maintaining real-time calculation capabilities for preventive control and stabilization.
Solution Approach 2:
The patent changes the parameter of constraint condition selection by using sensitivity analysis to identify and remove constraints with negligible impact. This parameter change allows the optimization problem to be solved efficiently even as the power system scale increases, maintaining real-time stabilization capability.
3Productivity
If constraint screening is performed to reduce calculation time, then the calculation speed improves, but the process of identifying unnecessary constraints becomes cumbersome
Solution Approach 1:
The patent implements feedback through sensitivity analysis, where the impact of each constraint condition on the objective function is evaluated and used to determine whether the constraint should be retained or removed. This automated feedback mechanism simplifies the constraint identification process while achieving effective constraint screening and improved calculation speed.
Solution Approach 2:
The optimization algorithm performs self-service by automatically identifying and removing unnecessary constraint conditions through sensitivity analysis. This self-service capability eliminates the need for manual constraint identification, reducing process complexity while maintaining high calculation speed for preventive control.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
There is provided a power system stabilization system and the like capable of achieving stabilization of a power system even when the scale of the power system is large. This include a processing unit configured to generate a constraint condition list which is a list of constraint conditions for performing preventive control on a power system, based on a power system model which is a model of the power system, a power system state which indicates a state of the power system, and an event list which is a list of events assumed in the power system. The processing unit is configured to display, by a display unit (16), information including a constraint screening parameter which serves as a criterion for whether to perform screening of the constraint conditions, and a screened constraint list which is a list of screened constraint conditions.