Impact of disturbance method on parameter identification of photovoltaic inverter model

With large scale grid-connected photovoltaic (PV) generation, it plays a more and more important role in power system, while the investigation of PV integration problem and solution is based on accurate model parameters. In this paper, the inverter model is introduced and model parameter sensitivity is analysed under different disturbances. Then the impact of disturbance method on parameter identification of PV inverter is discussed. Three disturbance cases are simulated to provide data for identification, and the identification results from these cases are compared. The analysis conclusion is useful for experimental design. Finally, the parameters of an actual inverter are identified based on experimental data.