主动移频式孤岛检测方法的参数优化  

Parameter Optimization of Active Frequency Drift Islanding Detection Method

作　　者：刘芙蓉[1] 康勇[1] 段善旭[1] 王志峰[1] 王辉[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2008年第1期95-99,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50237020);台达电力电子科教发展基金重点项目(DREK200501)。~~

摘　　要：孤岛检测是光伏系统并网必备的功能,要求既能快速检测出孤岛状态,同时又尽量减少对电网的不良影响。孤岛检测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是否合理,但目前的研究在参数优化的理论指导方面严重不足。该文通过对主动移频式孤岛检测方法的检测盲区进行分析,推导了带线性正反馈主动移频式(active frequency drift with positive feedback,AFDPF)孤岛检测方法的盲区大小与反馈增益间的关系,并得出特定负载下孤岛检测无盲区AFDPF反馈增益的取值范围,从而为AFDPF孤岛检测方法的参数优化提供了理论指导。Anti-islanding protection is mandatory feature for grid-connected inverters. Desired islanding detection method not only can detect islanding within acceptable duration but also require it has less adverse impact on power quality. The performance of islanding detection method is usually subject to anti-islanding strategy and parameter setting. The paper analyzes non detection zone （NDZ） of active frequency drift （AFD） and active frequency drift with positive feedback （AFDPF）. Based on analysis the relationship between NDZ and feedback gain of AFDPF is deduced, which can be expressed as a mathematics equation and gives range for feedback gain to guarantee anti-islanding protection. The calculation is simple and accurate, thus can be taken as a good guideline in AFDPF parameters setting.

关 键 词：主动移频 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]