适用于高土壤电阻率地区的220/110kV输电线路塔型研究
Journal of Electric Power(2013)
Abstract
雷电故障是220/110 kV高压输电线路的主要故障型式,特别在高土壤电阻率地区体现为雷电反击故障。结合国家电网公司提出的输电线路典型设计思想,分析了高压输电线路的5种典型塔型结构,认为酒杯塔和猫头塔是承受线路反击故障的主体。选择220 kV同高度的典型酒杯塔和猫头塔建立仿真模型,采用ATP/EMTP的标准反击计算方法进行耐雷水平和反击跳闸率的计算。结果表明,在取冲击接地电阻为25Ω条件下,酒杯塔的反击耐雷性能稍好于同等参数的猫头塔。
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Key words
high soil resistivity,cup-type tower,ATP/EMTP,tower type of power transmission line,ehv power transmission,cat-head tower,lightning back-flashover performance
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