某35kV线路并联可调式保护间隙应用研究  

Application Research on Parallel Adjustable Protection Gap Device for a 35 kV Line

作　　者：孙登敏[1] 葛广瑞 吴松[3] 刘源[1] 雷丰瑞[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410076 [2]菏泽市供电公司,山东菏泽274000 [3]华中科技大学,武汉430074

出　　处：《电瓷避雷器》2011年第4期78-82,共5页Insulators and Surge Arresters

摘　　要：对广宁地区一条35 kV架空线路现有防雷现状进行了分析,认为单纯地降低杆塔接地电阻提高线路的防雷性能并不理想。为此建议采用绝缘子串并联一种可调式保护间隙进行线路改造。分析了可调式保护间隙保护原理和结构,并通过大量的雷电冲击试验得出了用于3片和4片绝缘子保护间隙的距离:3片为345.12 mm,4片为440 mm,并验证了该保护装置的有效性,可适用于其他35 kV架空线路。对比试验及数据计算结果表明,当绝缘子片数增至4片时,既提高了线路的防雷性能,也确保了可调试保护间隙的应用效果。The present situation of lightning protection of a 35 kV line in the guangning area is analyzed, concluded that it is not ideal to improve the lightning protection performance only by reducing the grounding resistance of the towers. Line transformation is suggested carried out by the insulator string in parallel with a kind of adjustable protection gap. The principle and structure of the adjustable protection gap are analyzed： the distances of the protection gap for 3 and 4 pieces is obtained by a good deal of lightning impulse tests： 345.12 mm for 3 pieces is, 440 mm for 4 pieces, and the effectiveness of the protection device is verified, this device can be applied to other 35 kV overhead lines. The results of contrast test and data calculate shows that, the lightning protection capability of the line can be improved by increasing the number of the insulator to four, and the Lightning protection capability of the protection gap will not be affected.

关 键 词：35 KV线路 可调式保护间隙 接地电阻 雷击跳闸率 

分 类 号：TM862[电气工程—高电压与绝缘技术]