Research on Seamless Switching Control Strategy Based on Virtual Synchronous Generator  

作　　者：Wei Kang Jibo Wan Lixia Zhang Qilong Zhang 

机构地区：[1]China University of Petroleum, Qingdao, China [2]Zibo Power Supply Company, Zibo, China

出　　处：《Energy and Power Engineering》2017年第4期436-444,共9页能源与动力工程（英文）

摘　　要：This paper studies the voltage, phase and current tracking strategy to eliminate voltage and current mutations when the virtual synchronous generator is switching between grid-connected and islanded. By using these strategies the inverter can realize secondary frequency regulation and voltage regulation. If the phase is near 0 or 2π a little disturbance may made the PLL output a big error, so a new PLL is proposed by this paper. A sine module is added in the PLL to avoid this error. In order to verify the strategy proposed by this paper a simulation model is built in Matlab/Simulink. The simulation results show that the control strategy can realize seamless switching.This paper studies the voltage, phase and current tracking strategy to eliminate voltage and current mutations when the virtual synchronous generator is switching between grid-connected and islanded. By using these strategies the inverter can realize secondary frequency regulation and voltage regulation. If the phase is near 0 or 2π a little disturbance may made the PLL output a big error, so a new PLL is proposed by this paper. A sine module is added in the PLL to avoid this error. In order to verify the strategy proposed by this paper a simulation model is built in Matlab/Simulink. The simulation results show that the control strategy can realize seamless switching.

关 键 词：Virtual SYNCHRONOUS GENERATOR PLL SEAMLESS SWITCHING Micro GRID 

分 类 号：R73[医药卫生—肿瘤]