摘要
通常用耐雷水平和雷击跳闸率来衡量输电线路的耐雷性能和安全性。为了提高其计算精度,利用电力系统电磁暂态仿真软件ATP-EMTP对跳闸率进行仿真计算,并结合目前带单避雷线和使用上字型直线塔的现状,改进了常用的电气几何模型(EGM)绕击特性分析方法。对比分析结果表明,改进后的计算方法和计算结果更加符合实际情况。同时对比分析了耐雷水平对跳闸率的影响,并对110kV输电线路提出改善耐雷性能的措施。
Lightning protection performance of transmission line is generally estimated by lightning withstand level and tripping rate. In order to improve their calculation accuracy, simulating calculations of tripping rate are studied by using the power system transient stability simulation software ATP-EMTP. Aiming at the present situation of upward-formed tangent tower with single overhead ground wire, the electrical geometry model （EMG） method is improved that commonly used for analyzing shielding failure characteristic. The contrast analysis results show that the improved method makes the results much more fit the fact. The influence of lightning withstand level on outage rate is analyzed and contrasted for putting forward measures for improving lightning protection performance of 110 kV transmission line.
出处
《煤矿机电》
2014年第2期28-30,33,共4页
Colliery Mechanical & Electrical Technology
基金
国家自然科学基金项目(51107143)
关键词
跳闸率
耐雷水平
电力系统电磁暂态仿真软件(ATP-EMTP)
电气几何模型
绕击
tripping rate
lightning withstand level
ATP-EMTP （Array Transform Processor-ExponentialMatched-Phase Transform）
electrical geometry model
shielding failure
