35kV架空配电线路防雷性能研究

Lightning Protection Performance of 35kV Overhead Distribution Lines

大庆地区用电需求量大,对供电系统的安全性有很高要求。然而,大庆地区配电线路由于气候环境恶劣、线路防雷设施差、线路巡护不到位、电网结构分布复杂等原因,线路的防雷能力较低。配电线路除受到直击雷的伤害外,电线上产生的感应雷也会产生500 k V以上的电压,对配电线路造成了严重伤害。因此,在雷雨等极端恶劣天气时,配电网故障频发,雷击跳闸率居高不下,极大地影响了供电的可靠性和安全性。因此,为了分析大庆地区线路的运行状况,重点对35 k V架空配电线路防雷性能进行研究,以期提供借鉴。

Daqing region electricity demand is big, the safety of the power supply system now, however, requires a high degree of daqing region distribution circuit line lightning protection facilities, poor line patrol and protect because of the bad climate environment does not reach the designated position distribution grid structure complicated reasons such as line lightning protection ability of the low power distribution lines in addition to the direct lightning strike damage, produced by lightning in the wire will produce a voltage of 500 k V, harm the distribution circuit in the extreme weather such as storm, frequent distribution network fault, lightning trip-out rate is high, greatly affect the reliability of power supply and safety.Therefore, in order to analyze the operation status of Daqing area lines, the study focuses on the lightning protection performance of 35 k V overhead distribution lines with a view to provide reference.