省级电能质量监测平台实测电压暂降特征分析  

Characteristics Analysis of Measured Voltage Sag in Provincial Power Quality Monitoring Platform

作　　者：李伟 丁凯 李琼林[2] 刘书铭[2] 禹华西 汪颖[3] LI Wei;DING Kai;LI Qiong-lin;LIU Shu-ming;YU Hua-xi;WANG Ying(State Grid Hubei Electric Power Research Institute,Wuhan 430077,China;Henan Electric Power Research Institute,Zhengzhou 450000,China;College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]河南电力试验研究院,河南郑州450000 [3]四川大学电气工程学院,四川成都610065

出　　处：《水电能源科学》2019年第10期155-157,162,共4页Water Resources and Power

基　　金：国家电网公司总部科技资助项目(52153218000B)

摘　　要：鉴于电压暂降特征信息是分析暂降发生原因和提出后续治理方案的关键,基于河南电网电能质量监测平台电压暂降实测数据,按不同电压等级将暂降特征信息划分为波形特征、幅值和持续时间进行统计分析。将波形特征划分为4种类型,发现短路故障、电机启动和变压器激磁是导致河南电网某地区电压暂降的主要原因。根据不同幅值和持续时间分区间统计电压暂降频次,揭示了电压暂降频次随持续时间减小,幅值增大而上升的趋势,并估计了敏感工业用户受影响情况。Characteristic information of voltage sag is the key to analyze the causes of sag and propose subsequent treatment schemes.Based on the measured data of voltage sag of Henan power quality monitoring platform,this paper divides the voltage sag characteristic information into waveform characteristics,amplitude and duration in different voltage levels,and carries out statistical analysis.The waveform characteristics are divided into four types.The conclusion shows that short-circuit fault,motor start and transformer excitation are the main causes for voltage sag in this region.Voltage sag frequency is counted by interval according to the different magnitude and duration.The trend of sag frequency increasing with the decrease of duration and the increase of amplitude is revealed.The influence on sensitive industrial users is estimated.

关 键 词：电压暂降 波形特征 暂降频次 实测数据 

分 类 号：TM71[电气工程—电力系统及自动化]