Sequence Impedance of Static Var Generator and Analysis of Influencing Factors on Subsynchronous Oscillation
Hu Peng1,2, Ai Xin1, Xiao Shiwu1, Zhang Mingyuan1, Yu Yongjun2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China 2. State Grid Xinjiang Electric Power Company Urumqi 830012 China
Abstract：Static Var generator (SVG) affects subsynchronous oscillation (SSO) characteristics of wind farm connected to grid. In this paper, the influence of SVG on the SSO characteristics was researched by impedance-based analysis method for gird-connected full-converter direct-drive wind farm. Firstly, the positive-sequence and negative-sequence impedance model were established, and the influence of SVG on the SSO characteristics of the system was revealed based on the stability criterion of multi-terminal impedance. The influence of control mode of SVG on SSO characteristics was researched combining with impedance-based stability criterion. Then, the dominant factors of the SVG control parameters affecting the SSO characteristics were identified based on the impedance sensitivity analysis method, and the adjustment scheme with SSO suppression based on the control optimization of SVG were proposed. Correctness and validity of the analysis were verified respectively with simulation.
胡鹏, 艾欣, 肖仕武, 张明远, 于永军. 静止无功发生器序阻抗建模及对次同步振荡影响因素的分析[J]. 电工技术学报, 2020, 35(17): 3703-3713.
Hu Peng, Ai Xin, Xiao Shiwu, Zhang Mingyuan, Yu Yongjun. Sequence Impedance of Static Var Generator and Analysis of Influencing Factors on Subsynchronous Oscillation. Transactions of China Electrotechnical Society, 2020, 35(17): 3703-3713.
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2020, Vol. 35 
