Firstly

a 100 kW grid-connected photovoltaic (PV) power generation system simulation platform including PV inverter

controller and external power system is established by real-time digital simulator (RTDS) big-step models and small-step models. Then

the current controller’s working principle and its RTDS modeling method are described at length. Finally

steady state and transient simulation experiments are designed based on the platform to verify the performance of the current controller

and the same field experiment is carried out for an actual high-power PV grid connected inverter. By the contrast analysis

it is shown that the platform accustomed to the real situation is suitable for analyzing the controllers’ performance.