35kV双回线路管型复合材料杆塔雷电防护研究  

Research on Lightning Protection of Tube Composite Pole of 35 kV Double Circuit Line

作　　者：林锋[1] 戴敏[2] 陈子涵[3] 刘宗喜[3] 文习山[3] 李志军[2] 王羽[3] 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]中国电力科学研究院,武汉430074 [3]武汉大学电气工程学院,武汉430072

出　　处：《电瓷避雷器》2016年第1期139-144,共6页Insulators and Surge Arresters

摘　　要：为了进一步利用复合材料杆塔本身结构特点,有效提高杆塔雷电性能,需设计合理的雷电防护方案。针对35 kV双回线路管型复合材料杆塔,提出了两种横担组合方式。根据该结构复合材料杆塔特点,从结构实现容易程度上分析,提出在多雷区采用架设地线,并采取杆塔线路内侧竖直接地引下方式的防雷方案。在两种横担组合方式下,对复合材料真型塔头进行雷电、操作冲击放电试验,确定了不同工况下接地引下线离塔身合适距离,以及杆塔雷电冲击绝缘强度。通过计算分析,获得35 kV双回线路管型复合材料杆塔防雷性能,与同电压等级一般铁塔防雷性能相比,复合材料杆塔雷电冲击绝缘强度提高了近1.67倍,在其他设计参数相同条件下,杆塔的耐雷水平提高了149%,雷击闪络跳闸率降低了78%。Based on the structure of the composite tower, reasonable lightning protection solutions need to be further designed to improve the lightning performance of the tower effectively. Two cross-arm combinations have been proposed to simulate the composite tower applied in 35kV double-circuit transmission line. According to the characteristics of the composite tower and the complexity of the structure to implement, a lightning protection solution is proposed to erect lighting line in lighting- prone areas and to take the form of grounded deflector internal side of the line. In both cross-arm combinations, lighting and switching impulse discharge tests are carried out on the model of composite tower, which is of the same physical dimensions as real one, to determine the suitable distance between grounding down line and tower and the insulation strength of the tower to the lighting impulse. By calculation and analysis, lightning performance of the composite tower in 35kV double-circuit transmission line is acquired. In comparison of the lighting performance of the general iron tower at the same voltage level, the lightning impulse dielectric strength of the composite material tower increases by nearly 1.67 times; when other design parameters are same, the lightning withstand levels of the tower increase by 149%, and lightning flashover trip rates decrease by 78%.

关 键 词：复合材料杆塔 接地引下方式 管型 雷电冲击绝缘强度 耐雷水平 雷击闪络跳闸率 

分 类 号：TM863[电气工程—高电压与绝缘技术]