Based On VFOC Control Of Distributed Solar Microgrid Power Generation Technology Research

Distributed solar microgrid power generation system is the main form of solar energy utilization in the future.In this paper,the topology and related technologies of 25 kW solar microgrid power generation system are studied and simulated.The topological structure and corresponding control algorithm of 45° staggered parallel MPPT are proposed to solve the discreteness problem of photovoltaic characteristics of solar photovoltaic cell modules and improve the efficiency of parallel circuit complementary and split MPPT.The DC/AC inverter module adopts a three-level topology structure based on virtual flux oriented vector control,which can effectively reduce the cost and volume of the inverter module and improve the grid-connected power quality.The entire system adopt RS485 communication technology,distributed control,provide monitoring foundation for system networking,and use C# to prepare monitoring software of upper computer,which is conducive to multi-system distributed control.The topology method and corresponding control technology proposed in this paper will be gradually applied to product design.