500kV防污型与普通型支柱绝缘子带电清洗效率对比

发布时间：2018-03-05 08:57

本文选题：带电水冲洗　切入点：普通型支柱绝缘子　出处：《高电压技术》2017年05期 　论文类型：期刊论文

【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。
[Abstract]:In order to improve the engineering practice of 500 kV voltage grade live water flushing, 500 kV voltage grade antifouling type and common type pillar insulator have been developed. Comparison test of cleaning efficiency between coated room temperature vulcanized silicone rubber (RTV) and uncoated RTV insulator was carried out. Using 8 mm diameter nozzle and 4 gun to coordinate cleaning, manual washing and automatic washing by hand were considered. The cleaning efficiency of typical antifouling type insulator and common type prop insulator under the same pollution grade is compared, and the cleaning efficiency of RTV coated insulator and non-coated RTV insulator are also compared. The test results show that there are grooves on the bottom surface of the antifouling insulators. When the washing angle is between 10 掳and 30 掳, the average washing time of the anti-fouling insulator should be increased by 1 s. When the flushing angle is greater than 30 掳, there is no significant difference between common insulator and anti-fouling insulator after flushing. It takes 31 s and 34 s for a person to wash the whole insulator manually with a flushing gun on the ground, and 26 s and 32 s for an on-board machine hand to flush the whole insulator automatically. When washing the circuit breaker strut coated with RTV at a flushing angle of 30 掳, The time required to rinse off the uncoated RTV supporting unit skirt was 2 s-1 / 3 s-1 / 4 s, respectively, while the time required for RTV coating was 4 sL / 5 sm / 6 s respectively. The average time required for each unit skirt was 2 times longer than that for uncoated RTV equipment. As the diameter of the irrigated equipment increases, The time required to flush the unit group increases linearly; with the increase of contamination, the time required to flush the unit group increases; with the increase of the flushing angle, The research work is of great significance for carrying out electrified water washing of 500 kV voltage grade transmission and transformation equipment efficiently.
【作者单位】：武汉大学电气工程学院;广东电网有限责任公司佛山供电公司;
【基金】：中国南方电网有限责任公司科技项目(K-GD2012-147)~~
【分类号】：TM216

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