复合材料杆塔输电线路接地方式优化研究  

Research on Grounding Optimization of Composite Material Tower Transmission Line

作　　者：雷梦飞[1] 赵淳[1] 苏杰[1] 任华[1] 王佩[1] 张伟[1] 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,湖北省武汉市430074

出　　处：《电网技术》2015年第9期2621-2626,共6页Power System Technology

基　　金：国家电网公司实用新型指南项目(复合材料杆塔线路过电压与防雷技术研究)~~

摘　　要：在运复合材料杆塔线路笼统采用逐基杆塔引下线接地的方式,增加投资费用,防雷性能裕度过大,而完全取消引下线又难以保障杆塔的安全运行,为此提出一种优化接地方式的方法。在计算杆塔耐雷水平和雷击跳闸率后,以雷击跳闸考核指标为参考依据,提出考虑杆塔地形环境、雷电活动等因素的接地方式配置实施流程,在保证技术性的前提下,提高经济性,确定合理的接地杆塔数量。对实际线路中的3个典型区段的配置结果表明,优化的方法较全线逐基接地分别减少使用1/2、2/3、1/3的接地引下线,同时满足考核指标,对工程应用具有较大的参考价值。It turns out to be redundant in lightning protection performance and increases investment cost when grounding for each composite material tower（CMT） on transmission lines, while completely cancellation of grounding cannot guarantee safety operation of tower. Therefore it is meaningful to propose a new way to optimize grounding. An implementation process of configuring grounding which takes the factors such as terrain conditions and lightning activities into account is developed in this paper, which iteratively computes lightning withstanding level and lightning trip-out rate（LTOR） of CMT before comparing it with the examination index until obtaining a rational grounding scheme, thus improving the economic efficiency on the premise of technical indicator. An application of it to 3 typical sections of a transmission line shows that optimized method has reduced the usage of downward ground wire respectively by 1/2、2/3、1/3 than the case of grounding each tower while meeting the operating requirement. The achievement of this paper has great reference value for engineering applications.

关 键 词：复合材料杆塔 接地 雷击跳闸率 优化 技术经济性 

分 类 号：TM86[电气工程—高电压与绝缘技术]