Two-Layer Optimization Strategy of Hydraulic Turbine Governing System Parameters in Ultra-Low Frequency Oscillation Damping Control
Yi Jianbo1, Zhang Guozhou1, Zhang Peng2, Liu Min3, Zhang Xing3
1. Key Laboratory of Wide-area Measurement and Control on Power System of Sichuan Province University of Electronic Science and Technology of China Chengdu 611731 China; 2. State Grid Sichuan Electric Power Research Institute Chengdu 610072 China; 3. China Electric Power Research Institute Co. Ltd Beijing 100192 China
Abstract：Aiming at the tricky problem of ultra-low frequency oscillation in the centralized hydropower delivery system, this paper proposes a parameter optimization strategy of hydro turbine governing system that takes into account both damping oscillation and frequency response dynamic performance. Firstly, this paper analyzes the mechanism and influencing factors of ultra-low frequency oscillation based on complex torque method. Secondly, it employs information entropy to develop a comprehensive performance index for suppressing ultra-low frequency oscillation and ensure the regulating ability of governing system. Thirdly, this paper builds a robust optimization model according to the above comprehensive performance index to achieve robust optimization of the governing parameters under complex operation conditions. Finally, the analysis of hydropower delivery real grid in Sichuan shows that the optimized parameters of the speed control system have good abilities to suppress ultra-low frequency oscillation and adjust the frequency under different working conditions.
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2022, Vol. 37 
