摘要
南方电网直流输电系统中,交流滤波器的电容器不平衡保护的动作正确率非常低,运行中发现,误动往往发生在交流滤波器投入涌流瞬间。这里首先从理论上阐述了交流滤波器投入瞬间产生涌流的原因,然后通过运行实例分析,提出了一些改进建议,以提高直流输电系统的运行可靠性。
The correct actuation rate of the unbalance current protection for capacitor of AC filter is very low in HVDC system of SCG. It was found that most of the mis-operation of this protection occurs at the moment when inrush current of AC filter happened. Here the reason that inrush current happens at the moment when switching on AC filter is formulated theorectically at first, then with analyzing the practical operation examples, improvement suggestions are put forward to improve the reliability of HVDC system operation.
出处
《科技信息》
2010年第31期I0323-I0324,I0328,共3页
Science & Technology Information
关键词
交流滤波器
电容器不平衡保护
涌流
AC filter the
Unbalance Current Protection
Inrush Current
