一起厂用电切换事故的分析及解决措施

Analysis and Solutions of an Accident of Auxiliary Power Supply Changeover

本文对一起厂用电公用段电源切换时发生的事故进行了分析,经过分析可见在并联切换过程中,形成了发电机到220 k V升压站的高低压电磁环网,从而造成了两公用段进线开关跳闸。同时提示今后工程中,可针对目前火电机组发电小时不断降低从而导致单机运行情况,适当调整方案以保证机组可靠性。

There is an accident during auxiliary power supply changeover. By analysis, it is concluded that a high and low electromagnetic loop network occurred between generation and switchyard. As though, it caused to trip of spare sections inconling breakers. It is concluded yet that in projects adjustments of scheme should be considered about the single unit operation due to reduction of power plants annual operation time.