Parameters' sensitivity analysis of grid-connected photovoltaic power generation model under different kinds of disturbances

Establishment of accurate model of photovoltaic power station is the foundation for analyzing the security and stability of the electricity grid and photovoltaic power station. There are still difficulties to identify all the parameters of photovoltaic power stations accuracy. First establish simulation model of grid-connected photovoltaic system. Then analyze the parameters of inverter and filter, which influence the photovoltaic system tendencies, by the track sensitivity analysis method. Analyze sensitivity in the situations of three-phase fault, irradiance step-down, and DC voltage-drop. It proves that parameters of the outer voltage loop control and filter parameter have higher sensitivity than other inverter control parameters on the active and reactive power.