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220kV变电设备带电水冲洗清洗效率试验研究

DOI: 10.13336/j.1003-6520.hve.2015.04.032, PP. 1313-1319

Keywords: 220,kV变电站,带电水冲洗,绝缘子,污秽度,冲洗方法,清洗效率

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Abstract:

清洗效率反映了带电水冲洗对绝缘子污秽清洗的洁净程度,国内外对220kV变电设备带电水冲洗清洗效率研究较少。为此,对220kV变电设备带电水冲洗盐密和灰密清洗效率开展了系统试验研究,针对3mm直径喷嘴4枪配合的冲洗方法,研究了典型设备绝缘子在不同冲洗角度和不同污秽度等级下的清洗效率。试验研究结果表明以绝缘子上/下表面盐密小于a级或盐密/灰密残余比例小于10%计,以3mm直径喷嘴4枪配合冲洗e级污秽度隔离开关支柱、TV瓷柱和TA瓷柱总冲洗时间不超过51s,总用水体积不超过137L;随着设备直径增大,冲洗干净所需冲洗时间逐渐增大。冲洗角度为30°时,设备直径每增加10cm,每5片伞裙冲洗时间需增加约1s;冲洗角度越大,冲洗时间也应逐渐提高;不同污秽度等级下绝缘子冲洗时间相差较大,从c级到e级污秽度等级下,隔离开关支柱冲洗时间从7s增加到17s,TV瓷柱冲洗时间从25s增加到38s,TA瓷柱冲洗时间从30s增加到51s。该试验研究结果对于220kV变电站带电水冲洗作业时间和冲洗洁净程度质量控制具有重要指导意义。

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