变压器相间后备保护现存问题及改善措施

摘要

Due to external factors in the transformer damage or failure,one of the main reasons is in phase backup pro-tection for transformer,mainly due to the interphase fault sensitive is not enough on the low voltage side and limitation of its action time is longer.This paper introduced the backup protection of transformer,analyzed the existing problems of transformer phase backup protection problem,and put forward some measures to solve and improve.%在导致变压器损坏或者故障的外部因素中，变压器相间后备保护方面的问题是最主要的因素之一，其对低压侧相间故障的灵敏程度不够，而且动作的时间限制较长是故障的主要原因。文中介绍了变压器的后备保护，分析了变压器相间后备保护中存在的问题，并且提出了针对性的改善措施。