Effect of Series and Parallel Compensation on Internal Transients in Overhead Transmission Lines PDF

Keywords

voltage, transmission lines, internal transients

Abstract

The main parameters of transient phenomena in a line are analyzed. Both attenuation factor and propagation coefficient are investigated in the time domain for transient as well as for steady-state operation. A theoretical base for the proposed model is presented. The insulation-level dependence for overhead transmission lines is discussed for both transmission and distribution systems. The margin of this dependence is deduced according to the geometrical dimensions of conductors. Both capacitive and inductive compensation are inserted. The proposed algorithm reduces the computational time due to its simplicity even in lines with compensation. The dependence of the rate of rise of front voltage on series and parallel compensation is considered. The rate of rise of front voltage (RRFV) along a typical 750 kV 400 km line is evaluated. The dependence of the maximum value of RRFV on either the series-compensation rating or the shunt compensation at the receiving end of a typical 750 kV transmission line with different lengths is discussed