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1. Safety monitoring and comprehensive automatic system for traction substation is the orientation of railway electrification today.
   牵引变电所安全监控及综合自动化系统是目前铁路电气化的发展方向。
2. The reasons why reverse current protection is not necessary in rectifiers of direct current traction substation are described.
   摘要通过分析，阐述了直流牵引变电所内的整流器不必设置逆流保护的理由。