The Research on Micro Photovoltaic Inverter Dual-loop Control Strategy

Abstract

The math models of the grid-on mode and stand-alone mode of the micro photovoltaic inverter are established. In order to improve the system dynamic response characteristics and anti-interference ability, The dual-loop control strategy of the dual—mode inverter is presented under two phase synchronous rotating axis; when the inverter needs mode—change in the two modes, working on the current controlling stand-alone mode, which can realize seamless switching between the dual—mode. The simulation results show that this control strategy is effective