Network equivalents in power system electromagnetic transient analysis

Abstract The paper develops an analysis basis and procedure by which parts of a complete network may be represented in equivalent form in evaluations of electromagnetic transient propagation in power systems. In particular, the equivalents are based on impulse driving-point and transfer impedance functions for networks of multi-conductor power transmission lines. The paper shows how these functions may first be defined numerically as discrete time series and then used in over-voltage studies of line energisation within a network, the analysis of the electromagnetic transients of short-circuit fault conditions, and the evaluation of circuit-breaker transient recovery voltages in fault current interruption.