并网风机群阻抗建模及系统谐振分析.pdf

Smart Grid 智能电网, 2017, 7(1), 37-45 Published Online February 2017 in Hans. /journal/sg /10.12677/sg.2017.71005 Impedance Modeling and Resonance Analysis of Grid-Connected Wind Turbine Group 1 2 3 1 1 1 1 Min Zhang , Qiuyu Chen , Jiajia Xu , Da Lei , Jinhao Wang , Weiwei Yang , Long Xu , Shengwen Li1, Huipeng Li1 1 State Grid Shanxi Electric Power Research Institute, Taiyuan Shanxi 2 State Grid Chengde Electric Power Company, Chengde Hebei 3 Wuxi Electric Power Company, Wuxi Jiangsu th th th Received: Feb. 7 , 2017; accepted: Feb. 25 , 2017; published: Feb. 28 , 2017 Abstract The harmonic resonance of wind power grid is an important reason leading to the resonance of global grid-connected system. It is a potential threat to the stable operation of the power system. Based on the grid-connected resonance principle of wind turbine generator, the grid-connected inverter impedance model is proposed to analyze the resonance of grid-connected wind turbine group. An actual wind farm model and parameters are modeled in MATLAB to calculate the re- sonance of grid-connected wind turbine group. The impact of wind turbine units number and output power to the resonant characteristics can be analyzed. The correctness of theoretical anal- ysis and effectiveness of the resonance analysis model is supported by the experimental results. It has a certain guiding significance to resonance analysis of running wind turbines group and grid- connected inverter design. Keywords Wind Turbines, Grid-Connected Inverter, Output Impedance, System Res