500 kV变电站工频电场的测量与分析  

Measurement and Analysis of Power Frequency Electric Field in a 500 kV Substation

作　　者：梁振光[1] 董霞[1] 郑路[1] 孟昭敦[1] 

机构地区：[1]山东大学电气工程学院,济南250061

出　　处：《高电压技术》2006年第11期81-83,122,共4页High Voltage Engineering

摘　　要：为了掌握500 kV变电站的工频电场分布,采用EFA-300低频电磁场分析仪,选取50Hz带通滤波、最大有效值方式,在某500 kV变电站厂区内,每间隔6 m测量电场强度值,将1092个测量数据绘制成电场强度分布图,找出其中电场强度较高的区域。测量结果显示,除个别区域外变电站内工频电场基本满足ICNIRP标准限值,分析变电站电场分布规律表明,电场强度较高的区域集中在主变、开关、断路器、互感器等设备及其连接线附近的区域,且场强最大值位于三相中的边相附近,应重点考核这一区域的工频电场值。In order to get much more understanding of power frequency electric field distribution, measurements are taken in a 500 kV substation. Measurement is taken once every 6 meter in the substation area. An EFA-300 low frequency electromagnetic field analyzer is used. 50Hz band-pass filtering mode and maximum RMS mode are selected. Summing up 1092 measuring data, the distribution of electric field strength is drawn and areas with high values of electric field are found out. Measuring results reveal that power frequency electric fields primarily satisfy limits of ICNIRP standard except in very few regions. Further analysis shows that high electric field values are mainly located in regions close to equipments and their connecting lines. These equipments include main transformers, disconnecter, circuit breakers, instrument transformers, etc. Positions of maximum electric field values are nearby outer phases of the three phases. Electric field values in these positions need to be examined in emphasis. A refine measuring positions with small spans is needed.

关 键 词：500 KV变电站 工频电场 测量 EFA-300 低频电磁场分析仪 

分 类 号：TM937[电气工程—电力电子与电力传动]