Research On Susceptibility Of The Conducted And Radiated Immunity Of The Shield Cable

With the development of power system and the increase of voltage level, electromagnetic interference has becoming a severe problem in substations.Based on the finite element software ANSYS,the electromagnetic field around the shield cable were analyzed and the inductance and capacitance matrices of the multiconductor transmission lines were acquired.In this paper the method was advanced for the expression of transmission-line parameters of the cable with shielding above ground. With the parameters get before,based on distribution parameter node admittance equations and the method of fast Fourier inverse transformation,this paper deduces respectively conducted immunity and radiated immunity equations with terminal voltage, and these formulas are validated by comparison simulation results with the reference result,Some experiments and simulated results have been done to research the crosstalk of shielded cable which proved the correctness and validity of this method.