Simulation on control strategies of grid-connected inverters

A new control strategy of grid-connected inverters in microgrid is presented in this paper. Combining the voltage, the frequency, the active power and the reactive power of microgrid, the structure of the grid-connected inverters is analyzed. And then it achieved the V/f-P/Q control strategy of the grid-connected inverters in microgrid. Also, the conventional P/Q control strategy of the grid-connected inverters is researched in the end. Through the example system, the dynamic characteristics of microgrid with the mode switching and load changing are detailedly analyzed. The simulation results show the correctness and validity of the control strategy of grid-connected inverters.