An Integrated Frequency Regulation Method Based on System Frequency Security Posture

Qiang Zhang, Chao Wang, Wenting Song, Pupu Chao (), Yonglin Jin, Hui Zeng, Ping Li and Wansong Liu
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Qiang Zhang: Electric Power Research Institute, State Grid Liaoning Electric Power Company Ltd., Shenyang 110006, China
Chao Wang: Electric Power Research Institute, State Grid Liaoning Electric Power Company Ltd., Shenyang 110006, China
Wenting Song: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Pupu Chao: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Yonglin Jin: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Hui Zeng: Electric Power Research Institute, State Grid Liaoning Electric Power Company Ltd., Shenyang 110006, China
Ping Li: Electric Power Research Institute, State Grid Liaoning Electric Power Company Ltd., Shenyang 110006, China
Wansong Liu: Electric Power Research Institute, State Grid Liaoning Electric Power Company Ltd., Shenyang 110006, China

Energies, 2024, vol. 17, issue 19, 1-17

Abstract: As the share of renewable energy in a grid increases, the grid’s frequency support capability weakens, and the spatial distribution of grid frequency becomes more pronounced. As a result, control strategies based on system frequency consistency and traditional frequency regulation dominated by synchronous machines are becoming increasingly inadequate for meeting the frequency regulation requirements of new-type power systems. To enhance the system’s frequency support capability, it is imperative to fully utilize the frequency regulation resources within the power system. To address this issue, this paper first introduces a system frequency security posture assessment method that accounts for the spatial distribution characteristics of the grid. Subsequently, a parameter optimization method for diverse frequency regulation resources is proposed in conjunction with the proposed comprehensive evaluation method for frequency regulation. Next, using a renewable energy feeder regional grid as an example, an integrated frequency regulation method based on the system frequency security posture is presented. Finally, the frequency regulation performance and economic costs of different frequency regulation methods are analyzed under various operating scenarios and disturbances using a model based on actual data from the renewable energy feeder regional grid. The simulation and index calculation results demonstrate that the method proposed in this paper effectively enhances the system’s frequency support capability, reduces the frequency disparity between different nodes within the grid, and maintains high economic performance.

Keywords: comprehensive effectiveness evaluation; frequency regulation; frequency security posture; parameter optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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