Research on the DC rain flashover mechanism of polluted post insulators

被引：0

作者：

Zhang, Chuyan ^{[1
]}

Meng, Xiaobo ^{[2
]}

Zhang, Fuzeng ^{[2
]}

Li, Ruihai ^{[2
]}

Ma, Yi ^{[3
]}

Mei, Hongwei ^{[1
]}

Wang, Liming ^{[1
]}

Guan, Zhicheng ^{[1
]}

机构：

[1] Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong Province

[2] Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, Guangdong Province

[3] Yunnan Electric Power Test and Research Institute(Group)Co., Ltd, Kunming 650031, Yunnan Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2014年 / 34卷 / 09期

关键词：

Artificial contamination test; External insulation performance; Pollution flashover; Pollution rain flashover; Post insulator; UHV DC; Water-drop discharge;

D O I：

10.13334/j.0258-8013.pcsee.2014.09.020

中图分类号：

学科分类号：

摘要：

The pollution flashover of post insulators in moist weather is an important factor which affects the external insulation of HVDC converter stations. This paper carried out a lot of contamination flashover tests of converter station post insulators in artificial rain. The discharge characteristics and flashover process of polluted post insulator in rain were obtained. According to the observation of test phenomena, it was found that the breakdown between shed caused by the water-drop discharge on the shed edge played a very important role in the rain pollution flashover process. Due to the different damp bound and dry bound condition, surface discharge characteristics of post insulators in rain were different from those in fog. Furthermore, based on the classical model of pollution flashover of the insulator, a model to describe the dc flashover process of the post insulator in rain was carried out. Moreover, U50% values of composite post insulators in fog were compared with those and in rain. And the U50% values in fog were generally higher than those in rain. However, the post insulator's shed geometry had a significant influence on the U50%. This work can provide theoretical support for external insulation design and maintenance of HVDC converter stations. © 2014 Chin. Soc. for Elec. Eng.

引用

页码：1481 / 1489

页数：8

共 31 条

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