[1]张启浩,吴德贯,马正霖.±800 kV特高压直流输电工程直流穿墙套管设计缺陷及其改进方法[J].高压电器,2019,55(04):239-244.[doi:10.13296/j.1001-1609.hva.2019.04.034]
 ZHANG Qihao,WU Deguan,MA Zhenglin.Defect and Improved Method of DC Wall Bushing Design in ±800 kV UHVDC Transmission Project[J].High Voltage Apparatus,2019,55(04):239-244.[doi:10.13296/j.1001-1609.hva.2019.04.034]
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±800 kV特高压直流输电工程直流穿墙套管设计缺陷及其改进方法()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年04期
页码:
239-244
栏目:
技术讨论
出版日期:
2019-04-15

文章信息/Info

Title:
Defect and Improved Method of DC Wall Bushing Design in ±800 kV UHVDC Transmission Project
文章编号:
0239-0244
作者:
张启浩1 吴德贯2 马正霖1
1. 中国南方电网超高压输电公司昆明局,昆明650300;2. 中国南方电网超高压输电公司检修试验中心,昆明650217
Author(s):
ZHANG Qihao1WU Deguan2MA Zhenglin1
1. Kunming Bureau,CSG EHV Transmission Company,Kunming 650300,China;2. Test & Maintenance Center of CSG EHV Transmission Company,Kunming 650217,China
关键词:
直流穿墙套管表带触指均压罩等电位回路电阻
Keywords:
DC wall bushingband connectorshield electrodeequipotentialloop resistance
DOI:
10.13296/j.1001-1609.hva.2019.04.034
摘要:
2011~2016年期间,运用在±800 kV直流输电工程中的某类型直流穿墙套管先后6次发生故障,暴露出 其在电气连接方面的一系列设计缺陷:均压罩等电位接触不良、表带触指接触电阻过大等。结合直流穿墙 套管SF6分解产物超标、内部闪络、回路电阻超标、接头发热案例深入分析了直流穿墙套管故障的原因,总结 了增加防松螺钉、等电位线、O型密封圈、接头镀银等改进措施,提出了增加等电位连接可靠性、保证通流裕 度的直流穿墙套管设计建议,并提出重视SF6分解产物测试、增加回路电阻测试的运维建议。
Abstract:
DC wall bushing of certain type in ±800 kV UHVDC transmission projection successively malfunctioned six times,and exposing a series of design defects in its electrical design such as the bad contact of the equipotential shield electrode or the band connector,and so on. The paper deeply analyses fault causes of DC wall bushing through cases of SF6 breakdown products over proof,internal flashover,loop resistance over proof,connector overheating. Improved methods such as increasing the locking screws,equipotential wires,seal rings and plating connector with silver are summarized. Design proposals of DC wall bushing such as increasing the reliability of equipotential connec? tor and ensuring the current margin are proposed. The paper proposes the suggestions for operation and maintenance of paying more attention to SF6 breakdown products and increasing the loop resistance test.

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备注/Memo

备注/Memo:
收稿日期:2018?08?21; 修回日期:2018?10?24; 张启浩(1986—),男,学士,主要从事高压直流输电设备 检修维护工作。 吴德贯(1987—),男,学士,主要从事高压直流输电设备 检修试验工作。 马正霖(1990—),男,学士,主要从事高压直流输电设备 检修试验工作。
更新日期/Last Update: 2019-04-16