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Study on Enhancing Lightning Protection Scheme of Catenary in Subway Viaduct Section

  • Li, Rui-Fang (Dept. of Electrical Engineering, Southwest Jiaotong University) ;
  • Chen, Kui (Dept. of Electrical Engineering, Southwest Jiaotong University) ;
  • Chen, Li-Sheng (Dept. of Electrical Engineering, Southwest Jiaotong University) ;
  • Cao, Xiao-Bin (Dept. of Electrical Engineering, Southwest Jiaotong University) ;
  • Wu, Guang-Ning (Dept. of Electrical Engineering, Southwest Jiaotong University) ;
  • Zhang, Xue-Qin (Dept. of Electrical Engineering, Southwest Jiaotong University)
  • Received : 2016.05.23
  • Accepted : 2016.10.28
  • Published : 2017.03.01

Abstract

Viaduct increases the height of subway catenary, namely magnifies lightning attraction scope that lead to higher possibility of suffering lightning stroke. Therefore, it is necessary to analyze performance of lightning striking to catenary of subway in viaduct section and propose an improving lightning protection scheme. In this paper, using ATP-EMTP simulation software to establish an associated model to evaluate lightning withstand level of catenary with existing lightning protection schemes including arrester and grounding point, an improving lightning protection scheme is proposed - every pillar ground earth and arresters are installed with some installing spacing between 200m to 400m based on lightning damage degree and reliability requirements - according to analyzing results: while lightning withstand level is lowest for lightning striking to the neutral pillar, lightning withstand level is greatest for lightning striking to the both-ends pillar that arrester and grounding point are both installed; grounding point could obviously improve lightning withstand level for lightning striking to ground wire while arrester could obviously improve the lightning withstand level for lightning striking to catenary; every pillar ground earth could enhance the lowest lightning withstanding level up to 2.5 times than of that pillar ground earth across every 200m.

Keywords

Catenary of subway;Viaduct;Lightning protection scheme;Arrester;Grounding point

Acknowledgement

Supported by : National Natural Science, Central Universities of China

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