摘要
500 kV电压等级输变电设备带电水冲洗目前已在国内开展,为不断完善500 kV电压等级带电水冲洗工程实践,开展了500 kV电压等级防污型和普通型支柱绝缘子、涂覆室温硫化硅橡胶(RTV)与不涂覆RTV绝缘子清洗效率对比试验。采用8 mm直径喷嘴、4枪配合清洗,考虑人站地面持冲洗枪人工冲洗和车载机器手自动冲洗这2种工况,比较了500 kV电压等级典型防污型和普通型支柱绝缘子在同一污秽度等级下不同冲洗角度的清洗效率,也比较了涂覆RTV和不涂覆RTV绝缘子在不同污秽度等级、不同冲洗角度下的清洗效率。试验结果表明:防污型绝缘子下表面存在凹槽,在冲洗角度为10°~30°之间时,防污型绝缘子冲洗干净单位伞群平均需增加1 s冲洗时间;当冲洗角度大于30°时,普通型和防污型绝缘子冲洗后残余污秽差别不大;对于e级污秽度普通型绝缘子和防污型绝缘子,人在地面持冲洗枪人工冲洗干净整支绝缘子所需时间分别为31 s和34 s,车载机器手自动冲洗干净整支绝缘子所需时间分别为26 s和32 s。在c、d、e这3种污秽度等级下,以30°的冲洗角度冲洗涂覆RTV的断路器支柱时,冲洗干净不涂覆RTV的断路器支柱单位伞裙所需时间分别2 s、3 s、4 s,而涂覆RTV的所需时间分别为4 s、5 s、6 s。平均每组单位伞裙所需时间要比未涂覆RTV设备所需时间多2 s。随被冲洗设备直径增加,冲洗干净单位伞群所需时间线性增加;随污秽度增加,冲洗干净单位伞群所需时间增加;随冲洗角度增加,冲洗干净单位伞群所需时间增加。该研究工作对于高效开展500 kV电压等级输变电设备带电水冲洗具有重要的指导意义。
500 kV power transmission and transformation equipment is washed by hot water in domestic at present.To improve and perfect the 500 kV hot water washing engineering, we cpmpared and experimentally researched the washing efficiency of normal and anti-pollution type post insulators in 500 kV, RTV coating and un-eoating insulator. Washing ef- ficiency for typical 500 kV normal and anti-pollution type post insulators under the same level contamination degree and different washing angle was compared by using 8 mm diameter nozzle with 4 guns after considering two working condi- tions such as artificial and vehicle-carried robot arm washing. The test results show that the anti-pollution insulator washing time for cleaning a unit umbrella needs 1 s more time than normal insulator due to surface groove with washing angle from 10° to 30°, and when washing angle is greater than 30°, washing time for cleaning a unit umbrella of regular and anti-pollution insulator has little difference. Artificial washing time for cleaning a e-contamination degree normal in- sulator and a anti-pollution insulator needs 31 s and 34 s, respectively, while with vehicle-carried robot arm, washing and cleaning the same insulators needs 26 s and 32 s, respectively. Washing time for cleaning a RTV coating unit umbrella with 30° washing angle under c, d, e-contamination degree need 2 s, 3 s, and 4 s, respectively, while for a RTV un-coating unit umbrella need 4 s, 5 s, and 6 s, respectively, under the same condition, 2 s washing time increasing for a RTV coating than a RTV un-coating unit umbrella on average. In addition, The washing time for a unit umbrella will increase linearly with the increase of diameter, and increase with the contamination degree and washing angle increase.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第5期1500-1508,共9页
High Voltage Engineering
基金
中国南方电网有限责任公司科技项目(K-GD2012-147)~~
关键词
带电水冲洗
普通型支柱绝缘子
防污型支柱绝缘子
清洗效率
RTV
污秽度
hot water washing
normal type post insulator
anti-pollution type post insulator
washing efficiency
RTV
contamination degree
作者简介
樊亚东 1967-，女，博士教授，博导.主要从事高电压与绝缘技术、工程电磁场及成用等方面的研究工作 E-mail：ydfan@whuedu．cn
