Transient analysis of a 22.9 kV/2 kA HTS cable under short circuit using equivalent circuit model considering different fault parameters

Abstract

The transient behavior of high temperature superconducting (HTS) cables could significantly depends on fault parameters. This paper investigates impact of fault resistance, fault type, and fault duration time on the transient behavior of a 22.9 kV HTS AC cable. To accomplish this, an equivalent circuit model (ECM) is established to model transient and steady state behaviors of understudied cable, while recovery and twisting effects are also considered. Some simulations were conducted using MATLAB/SIMULINK as case studies to analyze the impact of the fault parameters on the transients of HTS cable. The results were shown that fault and grid parameters drastically change the electromagnetic and thermal behaviors of cable, namely, maximum fault current, maximum temperature, and induced Lorentz force. An increase in the fault resistance could significantly reduce the temperature increase and applied Lorentz force. On the other hand, type of fault changes the maximum induced Lorentz force on tapes and change it from kPa to MPa. Also, the effect of fault duration is studied which shows that a drastic increase in the fault time leads to burnout of tapes.