下垂控制并网逆变器的孤岛检测机理研究  

Research on islanding detection of grid-connected inverter system based on droop loop control

作　　者：王晓寰[1] 杨庆收 阚志忠[1] 王琳[1] WANG Xiao-huan;YANG Qing-shou;KAN Zhi-zhong;WANG Lin(ey Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province,College of Electrical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]电力电子节能与传动控制河北省重点实验室,燕山大学电气工程学院,河北秦皇岛066004

出　　处：《电工电能新技术》2018年第4期15-23,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51477148;51607154)、河北省自然科学基金项目(E2016203357)

摘　　要：分布式发电系统并网运行时,孤岛检测是必须具备的功能。孤岛检测既要求快速准确地检测孤岛,又要求尽量减少对电网造成的不良影响。本文针对微电网中应用越来越广泛的下垂控制并网逆变器进行研究,提出了一种基于相位差变化率检测的改进移相法,该方法具有非破坏性,能够快速准确地检测到孤岛的发生。通过仿真和实验,证明了所提出孤岛检测方法的可行性。Islanding detection is one of the necessary functions of grid connected distributed generation system.It requires not only to detecte the islanding state fast and accurately,but also to minimize the adverse impact on the grid.In this paper,phase shift detection method based on the change rate of phase difference is proposed for droop loop control inverter connected to the grid.The proposed method has the advantages of fast and non-destructive.At last the proposed method is tested to be effective by simulation and experiment.

关 键 词：分布式发电 下垂控制 孤岛检测方法 移相法 

分 类 号：TM74[电气工程—电力系统及自动化]