摘要
根据避雷线在配电网的雷电防护作用中的机械应力要求,对避雷线的支架高度进行分析及计算。并利用感应雷过电压产生机理分析避雷线对感应雷防护,由于避雷线耦合作用在一定程度上降低相导线上的感应过电压,通过分析避雷线在不同档距及在不同导线搭配情况下计算得到的支架高度的取值范围。最后,在不同高度架设避雷线分析其与各相导线耦合系数和在感应雷作用下的各相导线过电压的降低量,并通过PSCAD仿真计算耐雷水平,得出10
According to mechanical stress requirements of the ground wire in the lightning protection in distribution network, the stent height of the ground wire is analyzed and calculated .And the lightning protection of ground wire is analyzed by using the generation mechanism of lightning overvohage, because the coupling of the ground wire to some extent reduce the induced voltage on the wire. By analyzing ground wire in different span and collocation of different line, the range of the stent height is calculated. Finally, when erecting ground wire in different height, the coupling coefficient of ground wire and each phase conductor and reduced amount of overvoltage of each phase conductor under the action of the lightning is analyzed, and the level of mine-resistant is simulated and calculated by PSCAD, the conclusion is obtained that 10 kV overhead distribution lines is not suitable for erecting ground wire.
出处
《电瓷避雷器》
CAS
北大核心
2012年第4期33-38,共6页
Insulators and Surge Arresters
基金
国家重点基础研究发展计划项目(973项目)(编号:2009CB7-24507)
广东电网公司科技项目番禺配网差异化防雷研究(编号:0113HK1100628)
关键词
10
kV架空配电线路
避雷线
架设高度
耦合系数
机械应力
雷电防护
10 kV overhead distribution lines
ground wire
erecting height
coupling coefficient
mechanical stress
lightning protection
作者简介
刘刚（1969～），男，副教授，研究方向为智能高压电网、过电压及其防护、电力设备外绝缘。
