摘要
基于三相光伏并网逆变器论述了反孤岛效应策略,同时,为了进一步缩小不可检测区(NDZ)的范围,提出了一种正反馈频率偏移法与正反馈电压偏移法相结合的孤岛检测方法,并阐述了该方法的原理。利用Matlab/Simulink软件对其进行了系统建模与仿真研究,并根据仿真结果搭建测试电路,对并网逆变器的反孤岛控制能力进行了测试,实现了非检测区域的进一步减小。实验结果表明,该方法在100 ms内可有效地检测出系统的孤岛状态。
Based on the three-phase grid-connected photovoltaic inverter, the anti-lsland protection strategy was discussed. In order to reduce the non-detection zone （NDZ） , a new frequency drift with voltage drift technique was proposed. The simulation model of system was established in Matlab/Simulink, and the experiment was researched according to the simulation, the reduction of NDZ was realized. The experimental results prove that the islanding can be detected effectively within 100 milliseconds by new technique.
出处
《机电工程》
CAS
2008年第9期34-36,50,共4页
Journal of Mechanical & Electrical Engineering
关键词
孤岛检测
频率偏移
电压偏移
不可检测区
islanding detection
frequency drift
voltage drift
non-detectlon zone（NDZ）
作者简介
薄涛（1984-），男，山西太原人，主要从事电力电子与电力传动方面的研究。
