桥接线变电站备用电源自投装置接线的改进

Improvement of Antomatic Switching Device of Reverse Source in Bridge Connector Transformer Substation

通过对桥接线变电站备用电源自动投入装置(BZT装置)接线的分析,指出在全接线运行方式下,主变压器保护动作闭锁BZT装置,将造成1台主变压器故障时,扩大为全站停电事故。在分析的基础上给出了桥接线变电站BZT装置接线的改进措施,使BZT装置能自动适应变电站运行方式,自动选择主变保护动作是否闭锁备投装置,避免停电事故的发生,提高供电可靠性。

Through analyzing the automatic switching device of reserve sources wiring of bridge connector transformer substation, this article indicated that generator transformer protection which blocked the automatic switching device of reserve sources would cause overall service interruption in the substation under the entire wiring running mode.Then the text provides improvement measures about the automatic switching device of reserve sources wiring in bridge connector transformer substation,in order to make the automatic switching device of reserve sources accommodate to different running modes in substation self-adaptation,and make the control of the generator transformer protection which is used to block the auto-switching equipment cast or cancel simultaneously.The improvement of the wiring not only avoid the overall service interruption in the substation,but also improve the reliability of power supply.