一起高厂变差动保护动作实例分析

An Example for Analysing the Action of Transformer Differential Protection

文章介绍了一起高厂变差动保护动作实例,针对故障现象和设备检查情况,分析了故障原因,提出改进措施:高厂变将传统励磁涌流制动改为自适应励磁涌流制动,提高了差动保护动作正确性。

This paper introduces a maloperation of transformer.As an example,analyses its cause of fault,and proposes the improving measures.The conventional harmonics restraint against inrush current was replaced with self adapting inrush current restraint.Its correct operation rate was enhanced.