高电压技术2013，Vol.39Issue(6)：1515-1521,7.DOI:10.3969/j.issn.1003-6520.2013.06.033
接触网引雷范围划分及跳闸率的计算方法
Lightning Scope Division and Lightning Trip-out Rate Calculation Method for Overhead Catenary System
摘要
Abstract
In order to evaluate the reliability of traction power supply system struck by lightning,we divided lightning strokes into three types according to the way of lightning over-voltage production,and proposed that the lightning stroke type was decided by the position of lightning leader.Combined with the basic principle of the electrical geometry model(EGM),EGMs of single-line section and double-line section of railway were established.Then the exposure arc range of return line and catenary wire were given,and coordinates equations of each exposure arc's intersection were derived.By using these equations,work ranges of different lightning types were obtained.Furthermore,taking the recommended calculation formula of lightning current amplitude distribution and construction of arc rate in DL/T 620-1997 into consideration,we proposed formulas of trip rate for the three lightning stroke types and an assessment method of total trip rate.After calculating the trip out rate of an electrified railway by the method,we found a phenomenon that the lightning trip rate of double-line section was lower than that of single-line section in a direct power supply system.Further analysis indicated that the shielding effect of return line on catenary was the main reason for this phenomenon.关键词
高速铁路/电气几何模型/雷击跳闸率/接触网/感应雷/直击/反击/绕击Key words
high-speed railway/ electrical geometric model/ lightning trip-out rate/ overhead catenary/ induction lightning/direct stroke lightning/back stroke lightning/ shielding failure引用本文复制引用
曹晓斌,熊万亮,吴广宁,李瑞芳,周利军..接触网引雷范围划分及跳闸率的计算方法[J].高电压技术,2013,39(6):1515-1521,7.基金项目
铁道部重大专项课题(2011T008) （2011T008）
教育部中央高校基本科研业务费专项资金(SWJTU11CX035) （SWJTU11CX035）
Project supported by Key Special Subject of Ministry of Railway of PRC(2011T008),Fundamental Research Fund for the Central Universities(SWJTU11CX035). （2011T008）
