In response to the overhead contact system problems during the testing and commissioning process of Zhengzhou-Wanzhou section of the Zhengzhou-Chongqing high-speed railway,the paper introduces the evaluation methods of catenary dynamic inspection data,analyzes the causes of problems,and proposes corresponding rectifica-tion measures.After acceptance inspection,it was found that after the implementation of rectification measures,the dynamic defects in the overhead contact system has been eliminated such as contact wire height,stagger,adjacent reg-istration location height difference,and adjacent suspension point height difference within a span,which improved the hard spot and arcing defects of the contact wire.The dynamic parameters of the overhead contact system meet the re-quirements of Q/CR 841-2021 Evaluation method of catenary dynamic inspection data.These rectification measures can be used not only to guide the rectification defects in the overhead contact system for existing line,but also to pro-vide reference for the overhead contact system design and construction.
Zhengzhou-Chongqing High-speed RailwayOverhead Contact SystemTesting and CommissioningRectification Measures
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