Analyzing the model of transformer windings under very fast transient overvoltage

The Very Fast Transient Overvoltage (VFTO) can produce electromagnetic interference and influence the secondary equipment greatly in conventional substation. To analyze the influence of VFTO in secondary equipment in transformers, this article introduces the multiconductor transmission lines model (MTL) and derives the transfer function of parallel-interleaved of transformer windings. At the last of the article, Simulink and physical experiments are carried out to verify the correctness of this method.