Anti- islanding detection for single-stage photovoltaic system based on Passivity

摘要

Based on the basic principles of anti-islanding detection, this paper puts forward an anti-islanding(AI) detection method which combined/q-axis voltage decoupling and positive feedback with Euler-Lagrange(EL) model .The proposed method is classified as an passive islanding detection method and it is based on the voltage change at the point of common coupling (PCC) that occurs in islanding .In the method, Add the d-axis decoupling voltage of PCC to the d-axis reference current of the EL model. A simulation study shows that the method is simple and feasible.