Research on Grid-Connected Control Strategies for Two-Stage Photovoltaic Inverters

Abstract

This paper conducts an in-depth study on the grid-connected control strategies for two-stage photovoltaic inverters, with a focus on the maximum power point tracking (MPPT) technology and the virtual synchronous generator (VSG) control technology. It analyzes the implementation algorithm of MPPT and its performance under temperature conditions, and elaborates on the principle of VSG control and the analysis of grid stability under low voltage conditions. Through simulations and experiments, it is verified that the proposed control strategies can effectively improve the power generation efficiency and grid-connected power quality of photovoltaic systems, and enhance the friendliness and adaptability of photovoltaic systems in the power grid.