广东电力2017，Vol.30Issue(3)：128-132,5.DOI:10.3969/j.issn.1007-290X.2017.03.024
±800kV换流站直流分压器闪络事件及防范措施
Flashover of DC Voltage Divider in ±800 kV Converter Station and Corresponding Precaution Measures
谭明 1熊杭 1张鹏程1
作者信息
- 1. 中国南方电网有限责任公司超高压输电公司广州局,广东 广州 510663
- 折叠
摘要
Abstract
In allusion to an accident of monopole interlocking of the DC system in Suidong converter station caused by flashover of DC voltage divider, this paper analyzes reasons for flashover accident.Results indicate that reduced hydrophobicity of composite bushing of the post insulator, worse parameter characteristic of the bushing umbrella skirt and bad operational condition of DC equipment will cause flashover of the divider.Thus, this paper presents corresponding measures to prevent flashover by combining external insulation characteristic of the DC divider, which include installing silicone assistant umbrella skirt, improving umbrella spacing of the bushing and extended travel of umbrella, detecting hydrophobicity of the composite bushing regularly and spraying new-type anti-pollution flashover coating so as to improve hydrophobicity and corrosion resistance.Meanwhile, it proposes to apply for reduced voltage operation and reduce operational working frequency voltage under severe weather such as downpour and smog.关键词
特高压直流/支柱绝缘子/直流分压器/闪络/外绝缘Key words
ultra-high voltage direct current (UHVDC)/post insulator/direct current voltage divider/flashover/external insulation分类
信息技术与安全科学引用本文复制引用
谭明,熊杭,张鹏程..±800kV换流站直流分压器闪络事件及防范措施[J].广东电力,2017,30(3):128-132,5.
