基于谐波畸变率正反馈的孤岛检测新方法  

A Novel Islanding Detection Method Based on Positive Feedback of Voltage Harmonic Distortion

作　　者：马静 米超 王增平 

机构地区：[1]新能源电力系统国家重点实验室,华北电力大学,北京市102206

出　　处：《电力系统自动化》2012年第1期47-50,65,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219704);国家自然科学基金资助项目(50907021,50837002,50920105705);高等学校学科创新引智计划(“111”计划)(B08013);中央高校基本科研业务费专项资金资助项目(11MG01)~~

摘　　要：孤岛检测是微电网并网运行的必备功能,传统的被动检测方法存在盲区,而主动检测方法对微电网具有破坏性。为实现孤岛无盲区与非破坏性检测,文中提出一种基于电压谐波畸变率正反馈的孤岛检测方法。根据IEEE Std 1547规定的标准对所述方法进行了理论分析和仿真验证,结果表明该方法在电压和频率均处于正常范围的情况下,可快速、有效地检测出孤岛的发生,在电网单相及两相断路情况下仍然有效,且不受伪孤岛问题的影响。实现了非破坏性无盲区孤岛检测。Islanding detection is a mandatory feature for grid-connected microgrids.Conventional passive islanding detection methods suffer from the existence of non-detection zone,while active islanding detection approaches are devastating to microgrid.To realize the detection of the non-detection zone and devastating,a novel islanding detection method based on positive feedback of voltage harmonic distortion is proposed.According to the IEEE Std 1547,theoretical analysis and simulation tests are conducted.The results indicate that the proposed method is able to detect islanding rapidly and effectively in the case that voltage and frequency are within normal limits.Also,this method is effective when single-phase and two-phase of breaker are disconnected.Furthermore,trip on false islanding can be avoided.The method achieves the goals of islanding detection without devastation and non-detection zone.

关 键 词：孤岛检测 微电网 谐波畸变率 伪孤岛 

分 类 号：TM76[电气工程—电力系统及自动化]