500 kV双联耐张瓷绝缘子串的串间放电现象

doi:10.11930/j.issn.1004-9649.202309036

中国电力 ›› 2024, Vol. 57 ›› Issue (9): 231-237.DOI: 10.11930/j.issn.1004-9649.202309036

500 kV双联耐张瓷绝缘子串的串间放电现象

程洋¹(), 夏令志¹, 牛雷¹, 阮巍², 孙昊³(), 曹轩赫³, 张世珉³

1. 国网安徽省电力有限公司电力科学研究院，安徽合肥　230022
2. 国网安徽省电力有限公司超高压分公司，安徽合肥　230000
3. 中国科学院电工研究所等离子体科学和能源转化北京市国际科技合作基地，北京　100190

收稿日期:2023-09-08 接受日期:2024-08-10 出版日期:2024-09-28 发布日期:2024-09-23
作者简介:程洋（1991—），男，硕士，工程师，从事输电线路和绝缘技术研究，E-mail：310258226@qq.com
孙昊（1989—），男，通信作者，博士研究生，从事等离子体应用技术研究，E-mail：sunhao@mail.iee.ac.cn
基金资助:
国网安徽省电力有限公司科技项目（B31205220007）。

Discharge Phenomenon of a 500 kV Double Tension Porcelain Insulator String

Yang CHENG¹(), Lingzhi XIA¹, Lei NIU¹, Wei RUAN², Hao SUN³(), Xuanhe CAO³, Shimin ZHANG³

1. State Grid of Anhui Electric Power Research Institute, Hefei 230022, China
2. State Grid Anhui Electric Power Co., Ltd., Ultra High Voltage Company, Hefei 230000, China
3. Beijing International S & T Cooperation Base for Plasma Science and Energy Conversion, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2023-09-08 Accepted:2024-08-10 Online:2024-09-28 Published:2024-09-23
Supported by:
This work is supported by Science and Technology Project of State Grid Anhui Electric Power Co., Ltd. (No.B31205220007).

摘要/Abstract

摘要：

以某换流站500 kV出线双联耐张瓷绝缘子串为研究对象，研究了双联瓷绝缘子串串间放电现象的成因。开展了电阻测试、剖面染色等实验，建立了双联瓷绝缘子串电场与放电仿真模型，获得了双联绝缘子串空间电场分布规律。研究结果表明：水汽侵入水泥黏合剂缝隙导致多个绝缘子阻值下降形成大量零值绝缘子（西侧20片、东侧4片）。由于两侧零值绝缘子数量差距较大，产生122 kV串间电位差是串间放电的主要成因。

关键词: 双联耐张瓷绝缘子串, 零值绝缘子, 电场分布, 串间放电

Abstract:

The mechanism of this phenomenon was studied with a double tension porcelain insulator strings in a 500 kV converter station. Experiments including resistance testing and cross-sectional staining were conducted, and a simulation model of double insulator strings was established to obtain the distribution pattern of the space electric field. The result shows that water vapor intrusion into the cement adhesive gap resulted in the resistance decrease of several insulators and the formation of 24 zero-value insulators (20 on the west side and 4 on the east side). The 122kV voltage difference between the strings was the main cause of the inter string discharge.

Key words: double tension porcelain insulator string, zero-value insulator, electric field distribution, discharge between strings

程洋, 夏令志, 牛雷, 阮巍, 孙昊, 曹轩赫, 张世珉. 500 kV双联耐张瓷绝缘子串的串间放电现象[J]. 中国电力, 2024, 57(9): 231-237.

Yang CHENG, Lingzhi XIA, Lei NIU, Wei RUAN, Hao SUN, Xuanhe CAO, Shimin ZHANG. Discharge Phenomenon of a 500 kV Double Tension Porcelain Insulator String[J]. Electric Power, 2024, 57(9): 231-237.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309036

https://www.electricpower.com.cn/CN/Y2024/V57/I9/231

图/表 8

图 1 双联绝缘子串串间放电现象

Fig.1 Discharge phenomenon between insulator strings

图 2 零值绝缘子的染料渗透试验结果

Fig.2 Dye penetration test results of zero-value insulators

图 3 双联绝缘子仿真模型

Fig.3 Simulation model of double insulator strings

图 4 某换流站500 kV出线双联耐张瓷绝缘子串间电场分布

Fig.4 The electric field between the double tension porcelain insulator strings of a 500 kV converter station

图 5 不同检测距离的外侧电场强度分布

Fig.5 Electric field strength at different detection distances

图 6 双联绝缘子串串间放电现象仿真结果

Fig.6 Simulation results of discharge phenomenon between double insulator strings

图 7 零值绝缘子位置的影响

Fig.7 The influence of zero-value insulator position

图 8 零值绝缘子数量的影响

Fig.8 The influence of zero-value insulator number

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500 kV双联耐张瓷绝缘子串的串间放电现象

Discharge Phenomenon of a 500 kV Double Tension Porcelain Insulator String

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500 kV双联耐张瓷绝缘子串的串间放电现象

Discharge Phenomenon of a 500 kV Double Tension Porcelain Insulator String

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