变电站直流环网的处理方法探讨

直流系统环网会给电力系统带来极大的危害。结合实际提出了三种判断直流系统是否存在环网的方法和三种查找环网故障点的方法，并以一起典型的直流环网故障处理过程作为例子，分析了环网处理方法在实际中的应用，指出信号注入法具有极大的优势，但存在技术上的局限，有待进一步研究。

Discussion on the handling method of DC looped network in transformer substation

Combined with practice, this paper put forward three kinds of judgment methods which judged whether there was a looped network of DC system and three lookup methods of looped network fault points. With the treating processes of a typical fault of DC looped network as an example, analyzed the application on the judgment methods of the looped network in the practical, pointed out that the signal injection method had a great advantage, but there were technical limitations, and needed further study.