For transformer differential protection, one of the important issue is the research on excitation inrush current and fault, as it is significant to transformer differential protection. Combining with project cases, this paper discussed the unwanted operation of protection caused by excitation inrush current Through analyzing harmonic data and wave form, it studied how to get setting valve related to excitation inrush current to serve as a reference for the peer.%对于变压器的差动保护,一个重要的问题就是对其励磁涌流及故障的深入研究,因为其对变压器差动保护效果有着十分重要的影响.本文结合工程实例探讨了励磁涌流导致的变压器误动作现象,通过对有关谐波数据及波形的分析,研究如何获得与励磁涌流相关的整定值,可供同行人员参考.
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