基于负序功率正反馈的孤岛检测新方法  

A Novel Islanding Detection Method Based on Negative-Sequence Power Positive Feedback

作　　者：马静[1] 米超[1] 夏冰阳[1] 王增平[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电工技术学报》2013年第4期191-195,共5页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB215200);国家自然科学基金项目(51277193;50907021;50837002);中央高校基本科研业务费专项资金项目(11MG01);教育部留学回国人员科研启动基金资助项目(教外司留[2011]1139号);河北自然科学基金项目(E2012502034);中国电机工程学会电力青年科技创新项目(电机学[2012]46号);河北省电力公司科技项目(KJ[2012]278-280)资助

摘　　要：针对某些微网孤岛检测方法存在检测盲区以及具有破坏性等特点,提出了一种基于负序功率正反馈的孤岛检测新方法。该方法在微网原有控制系统中,引入负序功率正反馈回路,通过检测负序功率增益的大小判断孤岛的发生。该方法能在IEEE Std.1547标准中所定义的最恶劣情况下,快速、准确地检测出孤岛状态,并具有无盲区和非破坏性的特点,同时,该方法在微网单相断开、两相断开情况下,仍能正确识别孤岛状态,并可在伪孤岛现象发生的情况下避免误判。Due to the non-detection zone and devastating islanding detection existing in many methods of microgrid islanding detection, a novel method based on negative-sequence power positive feedback is proposed. The circuit of negative-sequence power positive feedback is added in the original grid-tied control system. And the islanding is detected by the gain of the negative sequence power. The method is able to detect islanding rapidly and accurately under most severe conditions defined by IEEE Std. 1547 and is characterized by its non-devastation and no non-detection zone. Furthermore, the method is capable of detecting islanding under conditions of one-phase or two-phase tripping. And the false islanding tripping can be avoided.

关 键 词：微网 孤岛检测 负序功率 伪孤岛 

分 类 号：TM727[电气工程—电力系统及自动化]