基于回路电流方程的变压器保护

The transformers protection based on loop current equation

差动保护是当前采用最为广泛的变压器保护,而励磁涌流是差动保护永远也无法回避的最为棘手的问题。文章介绍了一种新型变压器保护原理,即基于回路电流方程的变压器保护,还介绍了变压器的回路方程,并给出了基于回路电流方程变压器保护的判据,分析了当前基于回路电流方程的变压器保护所面临的问题及一些解决方案。

Differential protection is the most widely used transformer protection at present, but inrush current is the most difficult issue which differential protection can never avoid. This paper introduces a new type of transformer protection principle, that is, transformer protection based on loop current equation, and presents the transformer loop equation, gives the criterion of such protection, analyzes current issues of transformer protection based on loop current equation and some solutions.