中国电力 ›› 2014, Vol. 47 ›› Issue (10): 36-39.DOI: 10.11930/j.issn.1004-9649.2014.10.36.3

• 电网—特高压直流输电专栏 • 上一篇    下一篇

±800 kV同塔双回直流输电工程绝缘配合研究

张刘春, 殷禹, 葛栋, 丁玉剑   

  1. 中国电力科学研究院,北京 100192
  • 收稿日期:2014-06-18 出版日期:2014-10-18 发布日期:2015-12-10
  • 作者简介:张刘春(1977—),女,山东济宁人,博士,高级工程师,注册设备监理师,从事交直流电力系统绝缘配合和防雷保护以及高电压与绝缘技术研究。E-mail: zhangliuchun@epri.sgcc.com.cn
  • 基金资助:
    国家电网公司科技资助项目“±800 kV同塔双回支流线路前期研究”(GY71-11-019)

Research on Insulation Coordination for ±800 kV UHVDC Double-Circuit Transmission Lines

ZHANG Liu-chun, YIN Yu, GE Dong, DING Yu-jian   

  1. China Electric Power Research Institute, Beijing 100192, China
  • Received:2014-06-18 Online:2014-10-18 Published:2015-12-10
  • Supported by:
    This work is supported by State Grid Corporation of China“preliminary research on ±800 kV UHVDC Double-Circuit Transmission Lines on Same Tower” (GY71-11-019)

摘要: 随着特高压电网的不断建设,可供特高压输电线路经过的通道逐渐变得有限,线路走廊的矛盾日益突出。为提高现有输电走廊的利用效率,有必要研究±800 kV特高压线路同塔双回输电技术。对换流站电气设备和架空输电线路的绝缘配合研究认为,换流站电气设备的绝缘水平,可与以往单回线的相同。对于±800 kV同塔双回输电线工程,由于线路之间的互感作用,其参数会有所改变,对线路上的过电压水平产生一定的影响。±800 kV同塔双回输电线路采用V形绝缘子串的悬挂方式,与中国以往±800 kV单回V形绝缘子串水平排列的悬挂方式有较大的差别。分析研究表明,±800 kV同塔双回输电线工程的空气间隙,决定于操作过电压。依据±800 kV同塔双回输电线工程操作过电压仿真计算,以及±800 kV同塔双回真型塔放电特性试验研究结果,进行了绝缘配合研究,推荐了±800 kV同塔双回直流线路最小空气间隙距离。

关键词: ±, 800 kV, 特高压直流, 同塔双回线路, 绝缘配合

Abstract: With the constant construction of UHV power grid, the available transmission corridors for planning UHV transmission lines is limited. To improve the efficiency of existing transmission corridors, it is necessary to research the transmission technology for ±800 kV double-circuit transmission lines on the same tower. An analysis is made on the insulation coordination of converter station and transmission line. In converter station, the adopted insulation level is same as the conventional one. For the ±800 kV double-circuit transmission lines on the same tower, the line parameters may vary due to the effect of the mutual inductance between lines, which could influence the overvoltage level. The suspension mode of V-shaped insulator string adopted in the ±800 kV double-circuit transmission lines is extremely different from the one adopted in the ±800 kV single-circuit transmission lines. Based on the researched results of overvoltage and the discharge characteristics experiment of the real tower in the project of double-circuit transmission lines, the insulation coordination has been investigated. For the ±800 kV double-circuit transmission lines, the minimum air gap is recommended.

Key words: ±800 kV, UHVDC, double-circuit transmission lines on the same tower, insulation coordination

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