一种自适应的主动移频孤岛检测方法  

A self-adapting active frequency-drift islanding detection method

作　　者：杨恢东[1] 吴浪[1] 李心茹 王河深 

机构地区：[1]暨南大学信息科学技术学院,广东广州510632

出　　处：《电子技术应用》2015年第12期65-68,共4页Application of Electronic Technique

基　　金：广东省科技计划项目(2014A010106014)

摘　　要：针对正反馈主动移频法存在检测速度不够快,对输出电流质量影响较大的问题,提出了一种自适应的正反馈主动移频检测方法。该方法采用新的初始截断系数,根据公共点的频率化率实时地调整正反馈系数,缩短了检测时间,减小了检测盲区。同时考虑了电网的波动,避免引入的频率差对输出电流质量的影响。通过相位理论分析和MATLAB/Simulink仿真,验证了该方法的有效性及优越性。Based on the islanding detection algorithm of active frequency-drift with positive feedback method, a self-adapting method is presented to surmount the disadvantages of the former. The self-adapting algorithm used the new initial chopper factor to replace the old and dynamically adjust the positive feedback parameter according to the rate of change of voltage frequency of the point of common coupling（PCC）. The non-detection zone（NDZ） is reduced, and the testing time is shortened. Considering the pow- er grid voltage fluctuations, it decreased the influence on output current. The phase of theoretical analysis and simulation results show that the self-adapting method is feasible and advantage.

关 键 词：孤岛检测 正反馈主动移频 截断系数 自适应 电网波动 

分 类 号：TM712[电气工程—电力系统及自动化]