摘要
在采用高压电网系统对主变压器进行空载充电操作时,由于断路器分合操作的瞬间,系统电压的相角通常都是随机的和不确定的。这常常导致产生过电压和励磁涌流,不仅对运行设备造成危害,而且可能会导致保护装置误动,严重威胁系统运行的安全性、可靠性和稳定性。因此采取可行的方法来控制断路器的合闸时间和角度,从而有效抑制空充主变时产生的励磁涌流就显得尤为重要。文章结合平班水电厂220 kV主变涌流抑制的可行性方案进行研究和探讨,为有效防止空充高压主变压器导致事故的措施研究提供了借鉴和参考。
The system voltage phase angle is usually random and undefined during switching on or off the isolator when we use the high-voltage grid system for the main transformer no-load charging operation. This often leads to over voltage and inrush current,which is not only harmful to the operation of the equipment,but also causes the pro-tection device malfunction and seriously threat the system security,reliability and stability. So how to take practical methods to control the circuit breaker closing time and angle,thus effectively suppressing air charge generated when the main transformer inrush current is particularly important. In this paper,the author studies and discusses the fea-sible plan combined with main transformer inrush current of 220kV main transformer inrush current of Pingaban hy-dropower station,which provides a reference to prevent such accident.
出处
《红水河》
2013年第5期87-90,共4页
Hongshui River
关键词
主变压器
励磁涌流
平班水电厂
main transformer
excitation inrush current
Pingban hydropower station
