高压直流瓷和玻璃绝缘子金属附件电解腐蚀试验方法

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摘要分别采用喷水法、盐雾法、电解法和固体污层法对绝缘子的铁帽、钢脚进行电解腐蚀模拟试验研究,并对不同试验方法的等效性和可行性进行分析。通过与金属附件的现场腐蚀情况进行对比,并综合考虑各种方法的可操作性,推荐采用喷水法和盐雾法进行绝缘子金属附件电解腐蚀的模拟试验研究。采用喷水法进行铁帽腐蚀试验时,盐溶液的电导率取8～10 mS/cm(20℃),喷水流量控制在8～10 L/h范围内;进行钢脚腐蚀试验时,溶液电导率取2～3 mS/cm(20℃),喷水流量为2～3 L/h。采用盐雾法进行试验时,盐水溶液的电导率调配为10～12 mS/cm,单个喷嘴的喷雾流量为0.25～0.4 L/h。

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	罗凌
	张福增
	王黎明
	梅红伟
	关志成
	李立浧

关键词 ：直流瓷和玻璃绝缘子, 金属附件, 电解腐蚀, 试验方法, 喷水法, 盐雾法

Abstract：In recent years,lots of porcelain and glass insulators on several HVDC transmission lines appeared hardware corrosion phenomena in China.The spray water method,the salt fog method,the electrolytic method,and the solid dirt layer method are used to carry out the corrosion tests for iron caps and pins of the insulators in this paper.Also,the equivalence and feasibility of those test methods are compared and analyzed.The spray water method and the salt fog method are proposed to research the electrolytic corrosion problem of hardware based on the comparison between the test results and the field corrosion.The conductivity and flow velocity of the solution are 8～10 mS/cm(20℃) and 8～10 L/h respectively while carrying on iron cap corrosion test with spray water method.For pin corrosion,these parameters are set as 2～3 mS/cm(20℃) and 2～3 L/h.The conductivity and flow velocity of the solution are 10～12 mS/cm(20℃) and 0.25～0.4 L/h per sprinkler for both iron cap and pin with salt fog method.

Key words： DC porcelain and glass insulator hardware electrolytic corrosion test method spray water method salt fog method

收稿日期: 2015-01-08 出版日期: 2015-05-22

PACS:

TM85

基金资助:国家重点基础研究发展计划(973计划)(2011CB209406),特高压工程技术(昆明、广州)国家工程实验室开放基金重点项目(NEL201203、NEL201301)和南方电网公司基础性、前瞻性科技项目(SEPRI-K133003)资助。

通讯作者: 罗凌男,1987年生,博士研究生,研究方向为特高压直流绝缘子金属附件电解腐蚀机理及其抑制措施。

作者简介: 罗凌男,1987年生,博士研究生,研究方向为特高压直流绝缘子金属附件电解腐蚀机理及其抑制措施。王黎明男,1963年生,博士,教授,博士生导师,研究方向为高压外绝缘和电工电能新技术等。

引用本文:

罗凌, 张福增, 王黎明, 梅红伟, 关志成, 李立浧. 高压直流瓷和玻璃绝缘子金属附件电解腐蚀试验方法[J]. 电工技术学报, 2015, 30(9): 103-111. Luo Ling , Zhang Fuzeng , Wang Liming , Mei Hongwei , Guan Zhicheng , Li Licheng. Test Methods for Hardware Electrolytic Corrosion of Porcelain and Glass Insulators on HVDC Transmission Lines. Transactions of China Electrotechnical Society, 2015, 30(9): 103-111.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I9/103

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