滑模频率偏移法的孤岛检测盲区分析  

Non-Detection Zone of Slip-Mode Frequency Shift Method

作　　者：刘芙蓉[1,2] 王辉[1] 康勇[1] 段善旭[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074 [2]武汉理工大学自动化学院,武汉430070

出　　处：《电工技术学报》2009年第2期178-182,共5页Transactions of China Electrotechnical Society

基　　金：台达科教发展基金资助项目(DREK200501)

摘　　要：孤岛检测是光伏系统并网必备的功能,其性能的好坏不仅取决于所采用的孤岛检测策略,也取决于检测策略中参数的设置,不当的设置直接导致检测能力不足或给电网带来较大负面影响。本文对滑动频率偏移法孤岛检测方法的工作机理和电网失压后公共点电压的频率偏移轨迹进行分析,得到不同算法参数下孤岛检测的盲区分布,为合理设置、优选算法参数提供理论依据。Anti-islanding protection is a mandatory feature for grid-connected inverters. A desired islanding detection method not only can detect islanding within acceptable duration, but also have less adverse impact on power quality. The performance of islanding detection method is usually subject to the anti-islanding strategy and parameter setting. The paper analyzes the mechanism of slip-mode frequency shift method and the frequency deviation in grid disconnection. Relationship between the non-detection zones （NDZs） and its algorithm parameter are discussed, which contribute to achieve ＂non islanding inverter＂ in practice.

关 键 词：滑模频率偏移法 孤岛检测 并网光伏系统 

分 类 号：TM92[电气工程—电力电子与电力传动]