A Simple Suppressing Method for Transformer Inrush Current

C.-L. Cheng, J.-C. Yeh, and S.-C. Chern (Taiwan)


Inrush Current, Transformer, SuppressingMethod


The inrush current of transformers often result in a malfunction of the differential relay and also causes a stress impact to the transformer. These have an adverse effect on the security and stability of the power system. In this paper, a simple suppressing method is proposed to suppress the inrush current of transformers. The method is very useful for both single-phase and three-phase transformers. The proposed method is examined by means of experiments, which show excellent results in suppressing the inrush current.

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