绝缘子及套管篇.ppt

电力设备绝缘诊断 绝缘子及套管篇,董明 西安交通大学 2009年9月,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。,紫外成像双光谱,在白天、日光下检测 紫外光的放射现象,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 Solution,Pollution Severity Test Swab Test,Measurement of Non-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 periodically. Data acquisition and control by means of wireless modem. Current and trend analysis on disc pollution condition.,Disc Pollution Supervisory System,Disc pollution supervisory system set-up,primary protection unit,Disc Pollution Supervisory System,Data acquisition unit,Surface Hydrophobicity On-line Monitoring of Composite Insulator,Electro-Controlled On-line Waterworks,Infrared signal transmitting module,Insulation action bar,Infrared signal-receiving & electric pump control module,Water jet