Research ArticleOpen AccessGoogle Scholar indexed
Research on Seamless Switching Control Strategy Based on Virtual Synchronous Generator
China University of Petroleum, Qingdao, China
Zibo Power Supply Company, Zibo, China
China University of Petroleum, Qingdao, China
China University of Petroleum, Qingdao, China
- 1 China University of Petroleum, Qingdao, China
- 2 Zibo Power Supply Company, Zibo, China
- 3 China University of Petroleum, Qingdao, China
- 4 China University of Petroleum, Qingdao, China
Energy and Power Engineering·Volume 09 (2017)·Pages 436–444·Published 6 April 2017·DOI10.4236/epe.2017.94B049
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Abstract
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.
KeywordsVirtual Synchronous GeneratorPLLSeamless SwitchingMicro Grid
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