主动电流幅值扰动的孤岛检测方法

Research of Islanding Detection Based on Active Current Amplitude Perturbation

本文根据光伏并网逆变器发生的孤岛效应原理,分析了被动式与主动式孤岛检测的优缺点,并提出了一种电流幅值扰动的孤岛检测方法,该方法有效地降低了被动式检测的非检测区域,同时不会对电网产生谐波污染。根据IEEE Std.1547中的规定对所提方法进行了理论分析,介绍了其工作过程,并给出了工作流程图,同时利用Matlab进行仿真,验证了该方法的有效性。

This paper investigates islanding detection problem of photovohaic grid-connected inverter. Firstly, ad- vantages and disadvantages of passive and active islanding detection are analyzed. Secondly, according to the theo- ry of islanding detection of PV-grid inverter, a novel islanding detection method of current amplitude perturbation is proposed, which effectively reduces the Non-Detection Zone of passive islanding detection and brings about no har- monic pollution to power networks. Furthermore, the working process and control flow chart are presented based on instructions of IEEE Std. 1547. Finally, the effectiveness of the proposed algorithm is verified by simulation results in Matlab.