三相光伏并网逆变器电流扰动孤岛检测建模及分析  

Modeling and Analysis of Current-disturbance Based Islanding Detection for Three-phase Photovoltaic Grid-connected Inverters

作　　者：杨秋霞 赵清林[1] 郭小强[1] 

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,河北省秦皇岛市066004

出　　处：《电力系统自动化》2012年第4期45-49,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金重点项目(50837003);河北省高等学校科学研究项目(2011249);秦皇岛市科学技术研究与发展计划项目(201101A119);燕山大学博士基金项目(B541)~~

摘　　要：电流扰动法是孤岛检测方法之一。首先建立了三相光伏并网逆变器孤岛检测时域数学模型,在此基础上探讨了有功电流扰动和无功电流扰动对公共耦合点电压幅值和频率的影响,并进行了量化分析。在MATLAB/Simulink仿真环境中根据IEEE Std.929—2000标准进行三相逆变器孤岛测试仿真研究,仿真结果验证了量化分析的正确性。所得结论有助于在可靠进行孤岛检测的前提下,最大限度地减小电流扰动对电能质量的负面影响。Current disturbance is one of the methods for islanding detection.This paper presents the time-domain mathematic model for the three-phase photovoltaic grid-connected inverter.Based on this model the effects of the active and reactive current disturbances on the voltage frequency and amplitude at the point of common coupling are discussed.Quantitative analysis is also given.The islanding detection for three-phase inverter is simulated in the MATLAB/Simulink environment following IEEE Std.929—2000.The simulation results verify the theoretical analysis.The methods given in the paper are useful for minimizing the negative effect of the current disturbance on the power quality with the reliable islanding detection.

关 键 词：孤岛检测 光伏发电 并网逆变器 电流扰动 

分 类 号：TM464[电气工程—电器]