基于低频扰动的多分布式电源孤岛检测方法

针对被动法检测盲区较大和主动法易产生稀释效应的问题,提出基于主、被动结合的多分布式电源(distributed generation,DG)孤岛检测方法.首先,该方法利用有源电力滤波器(active power filter,APF)实现无功功率扰动,即通过扰动APF的q轴参数来控制其输出频率为2 Hz的无功功率,以扰动孤岛频率周期性波动.然后,利用小波分解和小波重构算法提取频率信号中的低频分量.最后,利用快速傅里叶变换(fast fourier transform,FFT)算法计算2 Hz低频分量的幅值并判断是否越限,以实现多DG孤岛检测.Matlab/Simulink建模仿真结果表明:该方...

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Published in电力系统保护与控制 Vol. 52; no. 16; pp. 132 - 140
Main Authors 杨帆, 杨志淳, 陈鹤冲, 雷杨, 徐丙垠, 张新慧
Format Journal Article
LanguageChinese
Published 国网湖北省电力有限公司电力科学研究院,湖北 武汉 430077%山东科汇电力自动化股份有限公司,山东 济南 250101 16.08.2024
Subjects
孤岛检测
小波分解与重构
active/passive combination
主、被动结合
multiple distributed generators
islanding detection
有源配电网
wavelet decomposition and reconstruction
多分布式电源
active distribution network
Online AccessGet full text
ISSN1674-3415
DOI10.19783/j.cnki.pspc.231514

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Abstract 针对被动法检测盲区较大和主动法易产生稀释效应的问题,提出基于主、被动结合的多分布式电源(distributed generation,DG)孤岛检测方法.首先,该方法利用有源电力滤波器(active power filter,APF)实现无功功率扰动,即通过扰动APF的q轴参数来控制其输出频率为2 Hz的无功功率,以扰动孤岛频率周期性波动.然后,利用小波分解和小波重构算法提取频率信号中的低频分量.最后,利用快速傅里叶变换(fast fourier transform,FFT)算法计算2 Hz低频分量的幅值并判断是否越限,以实现多DG孤岛检测.Matlab/Simulink建模仿真结果表明:该方法能够有效地避免稀释效应,实现多DG孤岛检测.
AbstractList 针对被动法检测盲区较大和主动法易产生稀释效应的问题,提出基于主、被动结合的多分布式电源(distributed generation,DG)孤岛检测方法.首先,该方法利用有源电力滤波器(active power filter,APF)实现无功功率扰动,即通过扰动APF的q轴参数来控制其输出频率为2 Hz的无功功率,以扰动孤岛频率周期性波动.然后,利用小波分解和小波重构算法提取频率信号中的低频分量.最后,利用快速傅里叶变换(fast fourier transform,FFT)算法计算2 Hz低频分量的幅值并判断是否越限,以实现多DG孤岛检测.Matlab/Simulink建模仿真结果表明:该方法能够有效地避免稀释效应,实现多DG孤岛检测.
Abstract_FL There are problems of large blind spots in passive detection and dilution effects in active detection.Thus this paper proposes a multi-distributed generation(DG)islanding detection method based on active/passive combination.First,this method uses an active power filter(APF)to achieve reactive power disturbance.This controls the reactive power output frequency of 2 Hz by perturbing the q-axis parameters of the APF,in order to perturb the periodic fluctuations of islanding frequency.Then,wavelet decomposition and wavelet reconstruction algorithms are used to extract low-frequency components from frequency signals.Finally,the fast Fourier transform(FFT)algorithm is used to calculate the amplitude of the 2 Hz low-frequency component and determine whether it is out of limit,to achieve multi-DG island detection.The modeling and simulation results using Matlab/Simulink show that this method can effectively avoid dilution effects and achieve multi-DG island detection.
Author 陈鹤冲
杨帆
雷杨
杨志淳
张新慧
徐丙垠
AuthorAffiliation 国网湖北省电力有限公司电力科学研究院,湖北 武汉 430077%山东科汇电力自动化股份有限公司,山东 济南 250101
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Author_FL YANG Zhichun
YANG Fan
LEI Yang
ZHANG Xinhui
CHEN Hechong
XU Bingyin
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Keywords 孤岛检测
小波分解与重构
active/passive combination
主、被动结合
multiple distributed generators
islanding detection
有源配电网
wavelet decomposition and reconstruction
多分布式电源
active distribution network
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PublicationTitle 电力系统保护与控制
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Publisher 国网湖北省电力有限公司电力科学研究院,湖北 武汉 430077%山东科汇电力自动化股份有限公司,山东 济南 250101
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Snippet 针对被动法检测盲区较大和主动法易产生稀释效应的问题,提出基于主、被动结合的多分布式电源(distributed generation,DG)孤岛检测方法.首先,该方法利用有源电力滤波器(active power filter,APF)实现无功功率扰动,即通过扰动APF的q轴参数来控制其输出频率为2...
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Title 基于低频扰动的多分布式电源孤岛检测方法
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