Study on the grid adaptability test for photovoltaic inverter based on RT-LAB simulator

A grid adaptability simulation test scheme for photovoltaic inverter based on RT-LAB simulator is proposed. First, the photovoltaic inverter grid adaptability simulation testing platform is constructed, which contains power circuit model of grid adaptability test, controller board of the photovoltaic inverter, and physical interface circuit. And then, a grid adaptability test device model is proposed, which can realisticly simulate the changes of grid voltage and frequency at any time according GB/T 19964-2012 “Technical requirements for connecting photovoltaic power station to power system". Finally, based on the proposed simulation test platform and the model of grid adaptability test device, grid adaptability simulation test for 100kVA Photovoltaic inverter is carried out, and the test result verifies that the simulation test scheme is correct.