基于某水电站PT一次保险熔断可监视化研究

Research Based on the Monitoring of PT Primary Fusing in a Hydropower Station

在发电系统中,电压互感器(PT)是测量主变低压侧、发电机机端等一次设备电压的重要装置,因采用设备质量不佳、保险老化、使用时间过久等固有因素,保险慢熔、熔断事件时有发生,可能会直接或间接导致一次设备停运,影响电站安全稳定运行。通过分析研究,在原有接线基础上增加电阻监视内容,在控制系统增加逻辑上的判据,从而有效降低电站发生PT一次保险熔断造成事故事件发生的风险。

In the power generation system,the voltage transformer(PT)is an important device to measure the voltage of primary equipment such as the low-voltage side of the main transformer and the generator terminal.Due to inherent factors such as poor equipment quality,aging insurance and long use time,insurance slow fusing and fusing events occur from time to time,which may directly or indirectly lead to the shutdown of primary equipment and to affecting the safe and stable operation of the power station.Through analysis and research,adding resistance monitoring content to the original wiring and adding logical criteria to the control system can effectively reduce the risk of accidents caused by PT insurance fusing of the primary equipment in the power station.