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《Engineering Journal of Wuhan University》 2017-02
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An equivalent modeling for hydropower generator group considering excitation and governor system

ZHANG Yangfan;LIU Dichen;LIANG Shanshan;PENG Changyong;School of Electrical Engineering,Wuhan University;Economic Research Institute,Hubei Electric Power Company;  
Building an equivalent model of mid-small sized hydropower generator group is a practical method carried out for dynamic analysis of water electricity grid;excitation and governor system have prominent influences on the precision of the equivalent model.This paper presents a method to build a dynamic equivalent model of hydropower generator units containing excitation and governing system.The method uses traditional equivalent model of hydropower generator group which is based on homology method as the foundation,and considers the equivalence of excitation and governor system;it uses PLPF method to get the equivalent parameters of excitation system and weighted average method to get the equivalent parameters of prime mover and speed governor.Numerical examples show that the error of the method in dynamic process is small;and it can improve the simulation accuracy.On this basis,further simulations are made to analyze the effect of excitation and governor system on dynamic characteristics.
【Fund】: 国家电网公司重点科技项目(编号:52153813020D)
【CateGory Index】: TM743
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