Suppression of Very Low Frequency Oscillation in Asynchronous Yunnan Grid Based on Hydroelectric Governor Additional Damping Control
Jianxin ZHANG , Gang CHEN , Jian ZHOU , Guangfu XU , Yong MEI , Wei LIU , Zhongfu DAI , Dongyang CAI , Tinghui ZHOU , Chao HONG
›› 2018, Vol. 12 ›› Issue (7) : 38 -43.
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Suppression of Very Low Frequency Oscillation in Asynchronous Yunnan Grid Based on Hydroelectric Governor Additional Damping Control
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Abstract
The review of mechanism of low frequency oscillation caused by speed governor and governor additional damping controller is presented. The mechanism of negative damping of hydroelectric speed governor is interpreted in depth. A kind of governor additional damping controller (GPSS, governor power system stabilization) is designed and proposed for hydroelectric speed governor in Yunnan grid. The time-domain simulation for Yunnan grid fully shows the effectiveness of GPSS to suppress very low frequency oscillation. The conflict between operational stability and adjust rapidity of hydroelectric unit can be solved effectively by installing GPSS on hydroelectric speed governor.
Keywords
very low frequency oscillation(VLFO) / governor power system stabilization (GPSS) / negative damping
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Funding
Science & Technology Project of China Southern Power Grid Co., Ltd.(ZDKJXM20160004)
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