一种改进的频率正反馈无功电流扰动孤岛检测研究  

An improved frequency feedback method for islanding detection of reactive power current disturbance

作　　者：鲍晓婷 陈永强 张超 张金刚 余飞鸿 Bao Xiaoting;Chen Yongqiang;Zhang Chao;Zhang Jingang;Yu Feihong(School of Electrical Engineering and Electronic Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学电气与电子信息学院,成都610039

出　　处：《电测与仪表》2018年第15期25-30,共6页Electrical Measurement & Instrumentation

基　　金：西华大学研究生创新基金(ycjj2017062)

摘　　要：孤岛检测技术能保证逆变型光伏发电系统并网对电力系统安全运行和稳定工作。基于对传统无功电流扰动方法的分析,提出了一种改进的频率正反馈的无功电流扰动孤岛检测方法。通过周期性地施加无功扰动电流和扰动函数的正反馈作用,加大无功扰动量,使频率越限,从而实现防孤岛效应保护功能。通过Matlab/Simulink仿真软件搭建了仿真模型,实验结果表明,该方法对电能质量影响小,不向电网注入谐波,具有无检测盲区、检测速度快的优点。The islanding detection technology can guarantee the safe and stable operation of the inverting photovoltaic power generation system in connection with the power system. Based on the analysis of the traditional method of reactive current disturbance,this paper presents an improved frequency positive feedback method for islanding detection of reactive current disturbance. Through the periodic application of the reactive disturbance current and the positive feedback function of the disturbance function,the amount of reactive disturbance is increased to limit the frequency,so as to achieve the anti-islanding effect protection function. The simulation model was built by Matlab/Simulink simulation software. The experimental results show that this method has little influence on power quality and does not inject harmonics into the power grid. It has the advantages of no detection blind zone and fast detection speed.

关 键 词：孤岛检测 频率正反馈 无功电流 光伏并网系 

分 类 号：TM76[电气工程—电力系统及自动化]