架空输电线路作为电网的重要组成部分,其分布广且线路长,大部分输电线路处于野外环境中.所以在雷雨季节受到雷击的可能性非常大。线路受到雷击,不仅对线路造成严重的损坏,同时威胁变电站的安全运行,以及整个电力系统供电的可靠性。现就...架空输电线路作为电网的重要组成部分,其分布广且线路长,大部分输电线路处于野外环境中.所以在雷雨季节受到雷击的可能性非常大。线路受到雷击,不仅对线路造成严重的损坏,同时威胁变电站的安全运行,以及整个电力系统供电的可靠性。现就我局新建220 k V景黎线一起雷击跳闸故障,结合输电线路的实际运行与防雷现状进行原因分析,在此基础上探索有效的防雷保护措施,以提高我局架空输电线路的防雷能力。展开更多
雷击严重影响架空配电线路的安全稳定运行,为准确评估线路的耐雷性能,提出了一种新的分析方法。将可能出现的雷电流幅值按1 k A分成多个区间,分别计算电流各区间的引雷范围及雷击跳闸率,总的雷击跳闸率为各区间跳闸率之和,克服了以往方...雷击严重影响架空配电线路的安全稳定运行,为准确评估线路的耐雷性能,提出了一种新的分析方法。将可能出现的雷电流幅值按1 k A分成多个区间,分别计算电流各区间的引雷范围及雷击跳闸率,总的雷击跳闸率为各区间跳闸率之和,克服了以往方法引雷范围不准确的缺陷;由于规程感应过电压计算结果不准确,且不能反映土壤电阻率的影响,因此感应过电压计算选择Rusck模型及在此基础上提出的考虑土壤电阻率的计算公式。展开更多
In order to improve the lightning protection performance of transmission lines, lightning protection management has been divided into every tower that lightning protection performance has been evaluated respectively. ...In order to improve the lightning protection performance of transmission lines, lightning protection management has been divided into every tower that lightning protection performance has been evaluated respectively. According to factors such as landform, span, tower type, grounding resistance, isolator type, and so on, relative ratio of tripping operation of every tower in the line has been calculated to evaluate its lightning protection safety performance, it is beneficial to operation maintenance and lightning reconstruction of transmission lines.展开更多
文摘架空输电线路作为电网的重要组成部分,其分布广且线路长,大部分输电线路处于野外环境中.所以在雷雨季节受到雷击的可能性非常大。线路受到雷击,不仅对线路造成严重的损坏,同时威胁变电站的安全运行,以及整个电力系统供电的可靠性。现就我局新建220 k V景黎线一起雷击跳闸故障,结合输电线路的实际运行与防雷现状进行原因分析,在此基础上探索有效的防雷保护措施,以提高我局架空输电线路的防雷能力。
文摘雷击严重影响架空配电线路的安全稳定运行,为准确评估线路的耐雷性能,提出了一种新的分析方法。将可能出现的雷电流幅值按1 k A分成多个区间,分别计算电流各区间的引雷范围及雷击跳闸率,总的雷击跳闸率为各区间跳闸率之和,克服了以往方法引雷范围不准确的缺陷;由于规程感应过电压计算结果不准确,且不能反映土壤电阻率的影响,因此感应过电压计算选择Rusck模型及在此基础上提出的考虑土壤电阻率的计算公式。
文摘In order to improve the lightning protection performance of transmission lines, lightning protection management has been divided into every tower that lightning protection performance has been evaluated respectively. According to factors such as landform, span, tower type, grounding resistance, isolator type, and so on, relative ratio of tripping operation of every tower in the line has been calculated to evaluate its lightning protection safety performance, it is beneficial to operation maintenance and lightning reconstruction of transmission lines.
