Study on the anti-islanding protection performance test for photovoltaic inverter based on digital/physical hybrid simulation

摘要

A modeling and testing scheme for photovoltaic grid-connected inverter anti-islanding protection performance based on RT-LAB simulator is proposed. First, the model of power loop of grid-connected PV inverter anti-islanding protection test is established, which contains PV array model, photovoltaic inverter power circuit model, anti-islanding protection performance testing device model and grid model; Then signal conditioning module model is built, the I/O physical interface circuit is constructed which connects the controller board of photovoltaic inverter and RT-LAB simulator. Finally, according to national standard GB/T 29319-2012 “Technical requirements for connecting photovoltaic power system to distribution network”, anti-islanding protection performance testing for the real control board of 125kVA photovoltaic inverter, and the test result can fully reflect dynamic and static performance in the process of anti-islanding protection performance test, and prove that the anti-islanding protection performance test scheme based on digital/physical hybrid simulation is effective.