This paper investigates the modeling and decoupling control of grid-connected voltage source inverter (GC-VSI) for wind energy conversion system (WECS) applications. Firstly, the typical configuration and operation principle of the direct-driven gridconnected WECS are analyzed. Then, by means of inputoutput modeling method and instantaneous active power theory, a time domain mathematical model of the GCVSI is set up. Besides, in order to resolve the GCVSI active current and reactive current crosscoupling nonlinear control problem, a vector decoupling control method for the GC-VSI firing pulse generation is deduced in the dq synchronous rotating coordinates. The proposed decoupling control method can realize the active power and reactive power of the GC-VSI injected into the grid are regulated independently. Finally, the performance of the proposed GC-VSI system is evaluated by using MATLAB/Simulink simulation.
Grid-Connected Inverter Voltage Source Inverter Decoupling Control Instantaneous Active Power Theory Wind Energy
Jingfeng MAO Guoqing WU Aihua WU Xudong ZHANG Kun YANG
School of Electrical Engineering, Nantong University, Nantong 226019, P. R. China Jiangsu Engineerin Jiangsu Engineering Research Center of Wind Energy Application, Nantong 226019, P. R. China School o School of Mechanical Engineering, Nantong University, Nantong, 226019, P. R. China Jiangsu Engineering Research Center of Wind Energy Application, Nantong 226019, P. R. China School of Electrical Engineering, Nantong University, Nantong 226019, P. R. China