Calculation method for one-section lumped-circuit model of uniform line

This paper aims to simulate transient characteristics of distributed parameter model by one-section lumped-circuit model (lumped-Π, lumped-T and lumped-Γ models). Based on error analysis of equivalent impedance in the lowest resonant frequency band of distributed parameter model and lumped circuits, a parameter calculation method of lumped circuits was proposed in this paper. The first simplification principle is to ensure power-frequency equivalent impedances equal. Secondly, be sure the first resonant frequency equal and comprehensive error of equivalent impedance in the lowest frequency band minimum. Contrast with traditional one-section lumped circuits, the applicable frequency band of one-section lumped-Γ, lumped-T and lumped-Γ models raised in this paper is extended. Obtained results can be used for the establishment of transient equivalent circuit.