Abstract：Research purposes: In order to take full advantage of the characteristics of network data sharing in intelligent traction substation and improve the overall performance of relay protection in traction substation, the disadvantages of traction substation conventional backup protection are analyzed, the functional requirements of backup protection in the station area of traction substation are proposed, the implementation schemes of traction transformer backup protection, bus main and backup protection, feeder remote backup protection, failure protection and dead zone protection based on comprehensive utilization of station area information are discussed, and the backup protection system of traction substation is constructed. Research conclusions: (1)The traction substation area backup protection system comprehensively utilizes the station information of traction substation, and makes comprehensive judgments based on protection direction selectivity and logic selectivity. (2)The area backup protection system realizes traction transformer backup protection, bus main and backup protection, feeder remote backup protection functions. (3)The analysis of protection action under typical fault conditions shows that the area backup protection system can improve and enhance the performance of traditional backup protection, achieve the goal of fast and accurate removal of faulty components, and improve the reliability of intelligent traction substation backup protection.(4)The research results can provide reference for the optimal configuration of relay protection in intelligent traction substation.
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2022, Vol. 39 
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