摘要
最近几年，已发生多起由于变电站直流电源消失，导致电力系统内的故障范围扩大，主变压器等电气设备受到严重损坏的事件。文中提出在不增加变电站设计复杂性的前提下，对上一级变电站的出线保护进行简单的改进，即设置能够切除110kV变电站主变压器低压侧各种短路故障的远后备保护。基于此思路，设计了一种新的保护继电器，并将其作为一个相对独立的模块置于现有的微机线路保护中。
In recent years. several accidents happened in 110 kV substations. Many power transformers are damaged seriously in the accidents when short-circuit faults occur at lower voltage sides of trans formers due to failure of DC supply systems. After analyzing the fault at secondary side of power transformer, this paper presents a technical scheme to trip out power supply of the substation from the supplying 110 kV substation. A new protective relay, based on the technique proposed in this paper. is installed in the remote substation. So the relay is called the remote backup protection for substation.
出处
《电力系统自动化》
EI
CSCD
北大核心
1999年第20期27-28,37,共3页
Automation of Electric Power Systems
