Research on the Operation Mode Switching Strategy of Wind Power-Photovoltaic Micro Grid

Abstract

Wind energy and solar energy are complementary in time. The power generation system composed of wind and solar energy can make full use of the clean energy for wind and solar energy and have high reliability. It is very important to smooth transition between grid-connected mode and the island mode. The micro grid of hybrid power generation system based on wind power is established in DigSILENT/Power Factory. The improved control strategy, P-Q control and the control strategy based on droop characteristics, have been proposed to be applied in the transition state simulation study mode based on the micro grid. The results show that this advanced control strategy can ensure the power balance and reasonable power distribution, and can maintain the voltage and frequency stability of the connection bus during the operation mode switching.