METHOD FOR DETECTING ISLANDING PROTECTION PERFORMANCE OF INVERTER

摘要

A method for detecting an islanding protection performance of an inverter. An RLC circuit is connected in series between an inverter and a grid-connected switch, the resonant frequency of an RLC load is set to make same present three different values, namely a resistive value, a capacitive value and an inductive value, and every time a fundamental wave current value of the grid-connected switch is set as different values, a time value from turn-off of the grid-connected switch to stop of the detected inverter is recorded; and weighted calculation is performed so as to obtain an islanding protection capability test result and grade evaluation of the inverter. The detection method solves the problem of difficulty in fine evaluation of an islanding protection capability of a photovoltaic inverter, comprehensively and objectively reflects an islanding protection performance of the inverter, effectively avoids a phenomenon of incorrect reflection of islanding protection capabilities of some inverters designed for characteristic loads, provides technical support for an existing method for detecting an islanding protection performance, and further enriches and perfects relevant standard systems in the field of islanding protection performance detection.