Analysis Method of the Interstage Short Circuit Fault in the On-Load Tap Changer

On-load tap changer (OLTC) is the core component of transformer equipment. In order to solve the problem that the model can not simulate the interstage short circuit, and can not characterize the transient characteristics of gear switching. This paper provides an analysis method of transient simulation of short circuit between stages of On-load tap changer based Matlab/Simulink. The simulation model is applied to analyze the interstage short circuit process of a 110kV arc extinguishing On-load tap changer. The simulation results are consistent with the fault recording results, which proves the accuracy of the model and provides an effective means for subsequent analysis of such faults.