高速铁路牵引变电所电流预警系统研究

牵引变电所现有微机保护和综自系统未针对电流回路设置监测功能,而实际运行过程中一次主导流回路及电流二次回路异常均时有发生,严重危及系统运行安全。本文深入分析AT供电方式下单个牵引变电所各回路电流分布及同一供电臂上3个所亭的电流分布关系,设置牵引变电所电流预警系统,依据电流逻辑判据对电流回路进行监控,并在某变电所内进行了现场试运行,取得了良好的效果。该系统填补了既有微机保护及综自系统未设置电流回路监测预警的缺失,具有设置便捷、通用性高的优点。

The existing microprocessor-based protection and integrated automation system of traction substation does not have monitoring function for the current loop,but the primary main loop of current conducting and the secondary loop of current are abnormal from time to time during actual operation,which seriously endangers the system operation safety.The paper deeply analyzes the current distribution of each circuit in a single traction substation under AT power supply mode and the current distribution relationship of three substations on the same power supply section,sets current logic criteria to monitor the circuit of current.A trial operation test is conducted at the site of a substation and it obtains good results.The system fills in the absence of the circuit of current monitoring and pre-warning in the existing microcomputer-based protection and integrated automation system,and it has the advantages of convenient setting and high universality.