摘要
孤岛检测是光伏并网发电系统所必备的功能。在各种被动和主动孤岛检测方法中,主动移频是一种比较有效的检测手段。该方法通过对逆变器输出电流的频率进行扰动来实现孤岛状态检测。本文分析了主动移频孤岛检测法的工作原理,推导出带正反馈的主动移频法的检测盲区,并详细给出了相关参数的优化过程。仿真与实验验证了该优化方法的有效性。
Islanding detection is a islanding detection method, the acti mandatory function for grid-connected converters. Among all the passive ve frequency drift method is pretty attractive. It injects perturbations in the and active frequency of the converter output current to achieve islanding detection. The operation principle of such strategy is analyzed in this paper. Non-detection zone （NDZ） and the parameters optimization principle are provided as well. The islanding detection performance is evaluated through theoretical analysis and experimental results.
出处
《电工电能新技术》
CSCD
北大核心
2008年第3期22-25,共4页
Advanced Technology of Electrical Engineering and Energy
基金
台达电力电子科技发展基金重点项目(DREK200501)
关键词
光伏系统
并网
孤岛检测
主动移频
PV
grid-connected converter
islanding detection
active phase shift
