Calculation of transverse voltages of communication lines induced by the fault current of power system

A double-line model is presented to calculate the transverse voltage of communication lines induced by the fault current of power lines. By dividing the communication line into several fictitious segments, a chain composed by the coupling P1-type circuit with distributed source is formed. The enhanced node voltage analysis (ENVA) is also developed in order to evaluate such a kind of model. The ENVA cuts the number of nodes down greatly because of treating the active and coupling impedance branches as a whole. In addition, the transverse voltages in time domain can be obtained easily from those calculated in frequency domain by means of fast Fourier transform. The numerical examples prove the validity and efficiency of the method by comparison with analytical results. The model is of significance to the design and the rights-of-way selection of power lines and communication lines.