Equivalent Modeling of Distributed Photovoltaic Considering Grid-Connected Characteristics

Aiming at the problem of large simulation calculation brought about by the use of the detailed model of distributed photovoltaic power generation systemin the simulation study of distributed photovoltaic grid-connected impact assessment power system, the paper proposes a distributed photovoltaic equivalent model considering the grid-connected characteristics. First, the composition of the PV power generation system is studied and a simplified model of each part is built, the output characteristics of each component module are analyzed, and a detailed model of the distributed PV power generation system is built ; second, a simplified model of the distributed PV power generation system is established, and the validity of the simplified model is verified by simulation ; then, according to the grid-connected characteristics of the inverter, the distributed PV is processed into different node types in the distributed PV grid-connected impact assessment simulation, and a distributed PV equivalent model is proposed. Then, according to the grid-connected inverter characteristics, the distributed PV is treated as different node types in the distributed PV grid-connected impact assessment simulation, and a distributed PV node equivalent model is proposed, and the validity of the node equivalent model is verified by simulation, and the applicability of the simplified model and node equivalent model is analyzed.