10kV架空配电线路避雷线架设高度的探讨

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...

Discussion on the Erecting Height of Ground Wire in 10 kV Overhead Distribution Lines

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 overvoltage,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.