Model validation of PV power generation unit based on grid voltage disturbance test

To establish accurate grid-connected photovoltaic (PV) power generation model is the basic of studying PV generation control, protection and mechanism of interaction with power grid. In the paper, the assumptions and requirements of model validation standard FGW-TG4 will be explained, and the result of grid voltage disturbance test will be compared to simulation result based on a generic modeling approach. Defining periods of before, during and after voltage drop, the deviations between simulations and measurements were calculated, and the deviation was within an allowed range.