Research on Damping Control Index of Ultra-Low-Frequency Oscillation in Hydro-Dominant Power Systems

Gang Chen, Chang Liu, Chengwei Fan, Xiaoyan Han, Huabo Shi, Guanhong Wang and Dongping Ai
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Gang Chen: State Grid Sichuan Electric Power Research Institute, Chengdu 610072, China
Chang Liu: State Grid Sichuan Electric Power Research Institute, Chengdu 610072, China
Chengwei Fan: State Grid Sichuan Electric Power Research Institute, Chengdu 610072, China
Xiaoyan Han: State Grid Sichuan Electric Power Company, Chengdu 610041, China
Huabo Shi: State Grid Sichuan Electric Power Research Institute, Chengdu 610072, China
Guanhong Wang: China Electric Power Research Institute, Haidian District, Beijing 100096, China
Dongping Ai: China Electric Power Research Institute, Haidian District, Beijing 100096, China

Sustainability, 2020, vol. 12, issue 18, 1-13

Abstract: In recent years, ultra-low-frequency oscillation (ULFO) is a prominent problem in power systems of dominant hydropower. In order to suppress ULFO, the most effective strategy is the governor parameters optimization to improve the system damping within the ultra-low-frequency band. However, no explicit standard has been established to stipulate the level of system damping for ULFO suppression. In this paper, the key factors that affect the amplitude and damping of ULFO are firstly analyzed. Then, the design principle of the damping control index of ULFO is put forward. According to it, a damping control index is proposed. After that, a case of ULFO in an actual power system proves the rationality of the proposed index. Finally, the application of the index in the Southwest China Power Grid illustrates its effectiveness and feasibility.

Keywords: ultra-low-frequency oscillation; primary frequency regulation; hydro-turbine governor; damping control index (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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