双ZBS2型酒杯塔输电线路雷电绕击特性研究
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摘要
通过建立缩小比例为25∶1的双ZBS2型酒杯塔输电线路模型,对其进行长间隙放电,研究了塔头、避雷线保护角、地面倾斜度等因素对雷击绕击率的影响。结果表明:杆塔对雷电先导具有吸引作用,雷击杆塔附近时,线路绕击率较低,从杆塔到档距中央,绕击率呈现一种先增大后减小的趋势;随着避雷线保护角由正到负变化,绕击概率随之降低;线路绕击概率随地面倾斜角增大,而呈现先增大后减小的趋势。本研究结果可指导企业输配电线路的雷电防护工作,为线路绕击防护装置的研发提供数据支持。
The influence of the tower head,the protection angle of lightning arrester and the ground tilt on lightning shielding failure rate was studied by long gap discharging experiments with a 25:1 double ZBS2 cup tower transmission line model. It was found that the tower attracted lightning leader. The shielding failure rate was low near the tower,and first increased and then decreased when moving towards the middle of the span. The shielding failure probability decreased when the protection angle changed from positive to negative,and increased first and then decreased when ground inclination angle increased. The results of this study can guide the lightning protection work of transmission and distribution lines in enterprises,and provide data support for the development of line shielding protection devices.
The influence of the tower head,the protection angle of lightning arrester and the ground tilt on lightning shielding failure rate was studied by long gap discharging experiments with a 25:1 double ZBS2 cup tower transmission line model. It was found that the tower attracted lightning leader. The shielding failure rate was low near the tower,and first increased and then decreased when moving towards the middle of the span. The shielding failure probability decreased when the protection angle changed from positive to negative,and increased first and then decreased when ground inclination angle increased. The results of this study can guide the lightning protection work of transmission and distribution lines in enterprises,and provide data support for the development of line shielding protection devices.
引文
[1]莫付江,陈允平,阮江军.输电线路杆塔模型与防雷性能计算研究[J].电网技术,2004,28(21):80-84.
[2]李建伟,刘全桢,阎明,等.石化企业35kV输电线路防雷对策研究[J].安全、健康和环境,2015,15(3):11-14.
[3]吴昊.浅谈35kV输电线路防雷保护措施[J].企业技术开发,2014,33(15):108,111.
[4]司马文霞,杨庆,李永福,等.输电线路雷电绕击评估方法分析及展望[J].高电压技术,2015,41(8):2500-2513.
[5]王晓瑜.几种雷电屏蔽分析模型物理基础的研究[J].高电压技术,1994,20(1):12-16.
[6]蓝磊,邓维,黄文武,等.平原地区500kV输电线路雷电屏蔽性能的模型试验研究[J].电网技术,2006,30(9):72-76.
[7]郑家松,李广福,季征南,等.山区500kV输电线路雷电屏蔽性能模型试验研究[J].高压电器,2009,45(5):119-122.
[8]黄欢,曾华荣,罗洪,等.架空输电线路防绕击避雷针防护效果试验研究[J].电瓷避雷器,2013(1):98-101.
[9]庞宇.贵州清镇35kV系统防雷综合措施研究[D].重庆:重庆大学,2004.
[2]李建伟,刘全桢,阎明,等.石化企业35kV输电线路防雷对策研究[J].安全、健康和环境,2015,15(3):11-14.
[3]吴昊.浅谈35kV输电线路防雷保护措施[J].企业技术开发,2014,33(15):108,111.
[4]司马文霞,杨庆,李永福,等.输电线路雷电绕击评估方法分析及展望[J].高电压技术,2015,41(8):2500-2513.
[5]王晓瑜.几种雷电屏蔽分析模型物理基础的研究[J].高电压技术,1994,20(1):12-16.
[6]蓝磊,邓维,黄文武,等.平原地区500kV输电线路雷电屏蔽性能的模型试验研究[J].电网技术,2006,30(9):72-76.
[7]郑家松,李广福,季征南,等.山区500kV输电线路雷电屏蔽性能模型试验研究[J].高压电器,2009,45(5):119-122.
[8]黄欢,曾华荣,罗洪,等.架空输电线路防绕击避雷针防护效果试验研究[J].电瓷避雷器,2013(1):98-101.
[9]庞宇.贵州清镇35kV系统防雷综合措施研究[D].重庆:重庆大学,2004.