Islanding Detection Method for Inverter-Based Distributed Generation by Injecting Second Order Harmonic Current

摘要

Novel islanding detection method was proposed for the inverter-based distributed generation (DG). The proposed method detects the islanding state by inj ecting negligible amount of the 2nd order harmonic current and measuring the magnitude ratio of the 2nd order harmonic voltage to the fundamental voltage at the point of common coupling (PCC). The 2