变压器中低压后备保护与出线保护整定配合的研究

Research of the cooperation of middle-low voltage back up protection of transformer and outlet protection setting

介绍了镇江电网变压器的中、低压侧后备保护的一般配置,阐述了变压器的中压侧或低压侧后备保护与出线有时不能相互逐级配合的情况,以及这种情况造成的危害。提出了解决这种上下级保护不能相互逐级配合的两种处理方法,并通过运行实践证明该方法是行之有效的。

This paper introduces the general allocation of middle-low voltage back up protection of transformer in Zhenjiang electric network. A situation that middle-low voltage back up protection can＇t cooperate step by step with outlet protection sometimes and its harms are presented respectively. Two kinds of solutions to cooperate the superior protection with the subordinate protection are put forward. This method is effective proved by operating practice.