电压暂降在时域和变换域中的检测算法综述  

Review on detection algorithm of voltage sag in time domain and transform domain

作　　者：伍红文 郭敏 邹建明 李强 陈智广 陈骏 张志辉 Wu Hongwen;Guo Min;Zou Jianming;Li Qiang;Chen Zhiguang;Chen Jun;Zhang ZhiHui(Wuzhou Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Wuzhou 543002,Guangxi,China;Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Nanning 530023,China)

机构地区：[1]广西电网有限责任公司梧州供电局,广西梧州543002 [2]广西电网有限责任公司电力科学研究院,南宁530023

出　　处：《电测与仪表》2021年第8期1-10,共10页Electrical Measurement & Instrumentation

基　　金：南方电网有限公司科技项目(GXKJXM20180337)。

摘　　要：电压暂降特征量是电能质量中重要的指标,针对当今电力系统中电压暂降敏感型负荷大量接入的现状,如何准确快速地识别电压暂降信息是保证用电设备安全稳定运行的关键。文章从电压暂降现象的概念与特征入手,对时域和变换域中不同的电压暂降检测方法原理进行综述,详细分析有效值检测法、残差电压检测法、d-q坐标分量检测法、两点检测法以及小波变换、傅里叶变换等方法的时效性、抗干扰性以及实用性等不同特点,并选取时域和变换域中的典型检测算法进行仿真分析,仿真结果验证了所述检测方法的时效性和抗谐波性能,最后对文中所列的主要检测方法进行归纳和总结。As an important indicator of power quality,how to accurately and quickly identify the voltage sag characteristic quantity information is the key issue for the situation of large-scale access to voltage sag sensitive load in power systems.This paper starts with the concept and characteristics of voltage sag and reviews the different voltage sag detection methods in the time domain and transform domain.Methods based on time domain such as the RMS detection method,residual voltage detection method,d-q coordinate component detection method,two-point detection method,wavelet transform and Fourier transform are analyzed in detail considering their timeliness,anti-interference and practicability.The typical detection algorithms in both time domain and transform domain are selected for simulation analysis.The simulation results verify the timeliness and anti-harmonic performance of the proposed detection method.Finally,this paper gives a brief summary of the main detection methods listed in the paper.

关 键 词：电压暂降 时域 变换域 检测 快速性 

分 类 号：TM761[电气工程—电力系统及自动化]