CAJ | 학술논문

针对安顺换流站 VBE 系统保护性触发导致极Ⅱ闭锁事故,基于高肇直流系统控制原理,分析了故障过程,指出UdL 分压器传感器故障是导致换流阀保护性触发的主要原因,换流变压器分接头采用 Udio 控制模式是间接原因.根据RTDS 仿真结果提出了如下反措:将整流侧换流变压器分接头控制设为角度控制模式,以避免类似的故障.
침대안순환류참 VBE 계통보호성촉발도치겁Ⅱ폐쇄사고,기우고조직류계통공제원리,분석료고장과정,지출UdL 분압기전감기고장시도치환류벌보호성촉발적주요원인,환류변압기분접두채용 Udio 공제모식시간접원인.근거RTDS 방진결과제출료여하반조:장정류측환류변압기분접두공제설위각도공제모식,이피면유사적고장.
Aiming at the blocking of poleⅡin Anshun Converter Station triggered by the VBE protective system, and accordint to the control principle of Guizhou-Guangdong DCⅡ, this paper analyzes the process of the first ESOF, and points out that the main cause of VBE firing is the sensor failure of the UdL voltage divider while the indirect one is the converter transformer tap using Udio control mode. Based on RTDS simulation results, a counter measure is proposed as following: to set the converter transformer tap changer control of the rectifier station as the angle control mode as to prevent the similar failure.