Electromagnetic Transient Analysis of Cable System Based on FDTD Method

Electromagnetic transient analysis of high-voltage cable system has significant practical meaning on the engineering problems,e.g.over-voltage protection,insulation coordination and electromagnetic interference.Frequency-dependent characteristics of both distributed parameters and phase-modal transformation matrices need to be taken into account for traditional method,e.g.EMTP software.Based on the finite difference time-domain(FDTD) method,a novel model is presented for transient analysis of power cable system.In this model,only frequency-dependent characteristic of cable's impedance parameters needs to be considered in phase domain.Compared with other models,the proposed model is demonstrated to be correct.As an extension,this model is improved for transient analysis of coaxial cable system.The calculated results are in good agreement with the experimental results.