电力设备绝缘诊断-绝缘子及套管篇

1、电力设备绝缘诊断-绝缘子及套管篇550kV变压器套管复合绝缘故障统计复合绝缘子引起闪络故障 支持瓷瓶 兰州供电局测试组变压器套管(户县电厂)变压器套管 假油位西安南郊变2006.6.23 仪器：P65兰州宣家沟变紫外线成像通过观察设备的 “电晕”及 “电气放电” “电弧” 来判断设备的故障所在位置断股，污染，裂纹等现象与红外互补紫外成像工作原理所有的电晕及放电现象都会产生不同份量、比例的：可见光 比例非常小紫外光 - 太阳盲区外 - 太阳盲区内紫外成像太阳盲区检测技术太阳盲区：指紫外光(UV)波段内一狭窄的、特定的光谱段(240 280nm)。一般认为此段内由太阳传来的紫外光份量极低，绝大部分

2、被臭氧层吸收。紫外线成像仪就是采用了对于太阳盲区内紫外光极其敏感的紫外线探测器及吸收太阳盲区外紫外光的UV滤片，集中检测盲区内的紫外光, 也就是所谓的太阳盲区检测技术。紫外光紫外图像信号UV滤片紫外线探测器紫外成像双光谱在白天、日光下检测 紫外光的放射现象太阳盲区滤片+紫外光探测器 检测电晕及电气放电用可见光图像 显示被测物体的实物形状光源紫外图像可见光图像图像重叠双光谱图像紫外成像污染、破损绝缘子用紫外法监测带电水冲洗Pollution Monitoring Interim SolutionPollution Severity Test Swab TestMeasurement of Non

3、-soluble Material Deposit Density (NSDD)An on-line disc surface condition monitoring system applied on 400kV overhead line system.A self-sustained solar power with battery supply system.Electric current flowing along the surface of the disc, temperature and relative humidity are measured periodicall

4、y. Data acquisition and control by means of wireless modem.Current and trend analysis on disc pollution condition. Disc Pollution Supervisory SystemDisc pollution supervisory system set-upprimaryprotectionunitDisc Pollution Supervisory SystemData acquisition unitSurface Hydrophobicity On-line Monitoring of Composite Insulator Electro-Controlled On-line WaterworksInfrared signal transmitting moduleInsulation action barInfrared signal-receiving & electric pump control moduleWater