35 kV配电线路直击雷防护计算
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摘要
山区配电线路运行时存在雷电直击现象,而目前35 kV配电线路的直击雷过电压研究相对较少。本文采用仿真计算的方法,研究35 kV配电线路耐雷水平变化规律并优化避雷器布置方式。仿真计算结果表明:线路无避雷器时耐雷水平低,装设避雷器可明显提升线路耐雷水平;采用每2至3基杆塔安装1组避雷器的安装方式,只有当雷击发生在安装了避雷器的杆塔附近的导线上时,才能显著提高线路耐雷水平;在易遭雷击的档距的两个杆塔上装设避雷器,线路耐雷水平能明显提升,且当雷击档距中央时耐雷水平最高。研究结论为35 kV配电线路直击雷过电压的防护及差异化防雷提供理论参考。
There's direct lightning strike to distributing line in mountain area. But only a few researches were conducted on direct lightning stroke over voltage of 35 kV distributing line. Simulation method is used to study lightning withstand level of 35 kV distributing line. Arrester arrangement form is optimized.The simulation results indicated that lightning withstand level is small without the arresters and it increased obviously with them. If one group of arresters is installed for every 2 or 3 towers,lightning withstand level increased obviously when lightning strike occurred on the line near the tower with the arrester.Lightning withstand level increased obviously if the arresters are installed on two towers of span vulnerable to lightning strikes. The lightning withstand level is maximum when lightning strikes on the middle span.This paper provides a theoretical reference for the protection and differential protection of lightning overvoltage of 35 kV power distribution lines.
There's direct lightning strike to distributing line in mountain area. But only a few researches were conducted on direct lightning stroke over voltage of 35 kV distributing line. Simulation method is used to study lightning withstand level of 35 kV distributing line. Arrester arrangement form is optimized.The simulation results indicated that lightning withstand level is small without the arresters and it increased obviously with them. If one group of arresters is installed for every 2 or 3 towers,lightning withstand level increased obviously when lightning strike occurred on the line near the tower with the arrester.Lightning withstand level increased obviously if the arresters are installed on two towers of span vulnerable to lightning strikes. The lightning withstand level is maximum when lightning strikes on the middle span.This paper provides a theoretical reference for the protection and differential protection of lightning overvoltage of 35 kV power distribution lines.
引文
[1]满超楠,杨帅峥,周琳,等.基于保护间隙的配电网差异性综合防雷保护[J].电瓷避雷器,2013,136(1):64-67,73.
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[5]江安烽,包炳生,顾承昱,等.后续雷击对10 k V配电线路耐雷性能及防雷措施的影响[J].电网技术,2014,38(6):1657-1663.
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[8]刘靖,刘明光,屈志坚,等.不同地形条件下架空配电线路的防雷分析[J].高电压技术,2011,37(4):848-853.
[9]陈洁,姜建勋. 10 k V配电线路雷害事故分析及防雷措施仿真研究[J].电瓷避雷器,2011,134(4):73-77.
[10]王羽,文习山,蓝磊,等.提高架空配电线路耐雷水平的仿真分析[J].高电压技术,2011,37(10):2471-2476.
[11]高新智,仇炜,韩爱芝,等.针对某35 kV配电线路防雷问题的探讨[J].高压电器,2010,46(4):69-73.
[12]高晓晶,杨林,周蠡,等. 10 kV配电线路感应雷过电压形成机理及计算研究[J].山东理工大学学报(自然科学版),2017,31(6):74-78.
[2]唐军,孔华东,陈焕栋,等. 10 kV架空配电线路避雷器感应雷保护特性分析[J].高压电器,2013,49(4):122-127.
[3]边凯,陈维江,沈海滨,等. 10 kV架空配电线路雷电防护用绝缘塔头[J].高电压技术,2013,39(3):749-754.
[4]张铁竹,张桂香.考虑线路走廊环境的35 k V配电网避雷器优化配置研究[J].电瓷避雷器,2016,139(5):74-78.
[5]江安烽,包炳生,顾承昱,等.后续雷击对10 k V配电线路耐雷性能及防雷措施的影响[J].电网技术,2014,38(6):1657-1663.
[6]何金良,曾嵘.配电线路雷电防护[M].北京:清华大学出版社,2013.
[7]陈思明,唐军,陈小平.根据电气几何模型对10 kV配电线路雷击跳闸率的计算分析[J].电瓷避雷器,2013,136(4):111-116.
[8]刘靖,刘明光,屈志坚,等.不同地形条件下架空配电线路的防雷分析[J].高电压技术,2011,37(4):848-853.
[9]陈洁,姜建勋. 10 k V配电线路雷害事故分析及防雷措施仿真研究[J].电瓷避雷器,2011,134(4):73-77.
[10]王羽,文习山,蓝磊,等.提高架空配电线路耐雷水平的仿真分析[J].高电压技术,2011,37(10):2471-2476.
[11]高新智,仇炜,韩爱芝,等.针对某35 kV配电线路防雷问题的探讨[J].高压电器,2010,46(4):69-73.
[12]高晓晶,杨林,周蠡,等. 10 kV配电线路感应雷过电压形成机理及计算研究[J].山东理工大学学报(自然科学版),2017,31(6):74-78.