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本文介绍上海地铁1号线牵引变电站干式整流变压器的特殊结线和获得12脉波直流的整流器结线以及直流馈线保护。在直流馈线装置中设置有6种保护,其中di/dt及ΔⅠ保护、框架保护等不同于交流变电站中的保护,本文对它们的保护原理作了些介绍。直流馈线装置中的自动重合闸装置也有别于一般自动重合闸装置,它必须经过判别馈线是否无故障,而且不是经1次判别,而是可连续判别5次确定馈线无故障后,才使开关重合闸,若馈线上存在永久性故障则封锁合闸,所以本文把自动重合闸也列于馈线保护。对于牵引变电站中的直流馈线保护我们正处于运行经验的积累阶段。
This article introduces the special connection of dry-type rectifier transformer of Shanghai Subway Line No.1 traction substation and the rectifier connection of 12-pulse DC and the protection of DC feeder. Six kinds of protection are provided in the DC feeder device. Among them, di / dt and ΔI protection, frame protection and so on are different from the protection in AC substation. In this paper, the protection principle of them is introduced. DC feeder device is also different from the automatic reclosing device automatic reclosing device in general, it must go through the identification of feeder is faultless, but not by a judge, but can be identified 5 times a row to determine the feeder fault-free before the switch Reclosing, if there is a permanent fault on the feeder is closed, so this article is also listed in the automatic reclosure feeder protection. For DC feeder protection in traction substations we are in the accumulation phase of operational experience.