中国电力 ›› 2015, Vol. 48 ›› Issue (8): 86-91.DOI: 10.11930.2015.8.86

• 电网 • 上一篇    下一篇

±500 kV兴安直流线路复合绝缘子积污特性

郑秋玮1,刘华钢2,邹建明2,杨帅1,喻剑辉1,周文俊1   

  1. 1. 武汉大学 电气工程学院,湖北 武汉 430072;
    2. 华中电网有限公司,湖北 武汉 430077
  • 收稿日期:2015-03-10 出版日期:2015-08-25 发布日期:2015-11-25
  • 作者简介:郑秋玮(1992—),男,湖北安陆人,硕士研究生,从事高电压技术、电气外绝缘研究。E-mail: 1539548096@qq.com
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(2042015KF0044)

Contamination Accumulating Features of Composite Insulator of ±500 kV Xingren-Baoan HVDC Transmission Line

ZHENG Qiuwei1, LIU Huagang2, ZHOU Jianming2, YANG Shuai1, YU Jianhui1, ZHOU Wenjun1   

  1. 1. School of Electrical Engineering, Wuhan University, Wuhan 430072, China;
    2. Central China Grid Company Limited, Wuhan 430077, China
  • Received:2015-03-10 Online:2015-08-25 Published:2015-11-25
  • Supported by:
    the Foundamental Research Funds for the Central Universities (No. 2042015Kf0044).

摘要: 受静电吸尘效应等影响,直流输电线路绝缘子积污相比交流输电线路的绝缘子较严重,污闪风险较大。测量、研究实际运行的直流线路绝缘子积污特性,有利于电力系统开展外绝缘配置、污闪防治工作,保障系统安全稳定运行。通过人工上塔擦拭的方法,采集±500 kV兴安直流线路实际运行的复合绝缘子表面污秽,测量其等值盐密,研究线路绝缘子积污特性。研究结果表明:±500 kV兴安直流线路复合绝缘子表面积污较轻,等值盐密都在0.025 mg/cm2以下,表面积污受污染源影响,2个直流极积污情况基本一致。复合绝缘子污秽沿串呈现两端大中间小的U形曲线分布,63%的取样样品上表面积污重于下表面,不同插花型式中小伞裙积污最严重。直流线路复合绝缘子积污特性与交流线路存在明显差异。

关键词: 直流, 复合绝缘子, 积污, 污闪, 等值盐密

Abstract: Under the influence of electrostatic dust collection effect, the insulator contamination of HVDC transmission line is heavier than that of HVAC and has a higher risk of pollution flashover. Study of the contamination features of insulators for DC transmission line is conducive to the external insulation configuration of power system as well as the prevention and control of pollution flashover, and can also ensure the safety operation of power system. This paper investigates the contamination features of insulators by collecting the contamination on the surface of composite insulators of ±500 kV Xingren-Baoan DC transmission line and by testing the ESDD under the laboratory environment. The experimental results show that the contamination on the surface of composite insulators of ±500 kV Xingren-Baoan HVDC transmission line is relatively light and the ESDD is below 0.025 mg/cm2; the contamination on the surface of insulators is influenced by the local pollution sources and the DC polarity has no effect on the contamination of insulator strings. The ESDD on the surface of composite insulator string appears U-shaped curve, and 63% of the sample’s ESDD in the upper surface is greater than that in the lower surface and the small insulator sheds have the worst polluted condition among different insulator sheds arrangement modes. Obvious differences are observed between DC and AC transmission lines in contamination features of composite insulators.

Key words: DC, composite insulator, contamination, pollution flashover, ESDD

中图分类号: