Study on effect of series compensation on double-circuit transmission lines

Abstract

This paper presents a study about effect of series compensation on double-circuit transmission lines. It improves power transfer capability of a long distance transmission lines. Series capacitors connected reduce inductive reactance of transmission lines and hence reduce the losses. It controls load flow between parallel circuits and improves dynamic and transient stability. In this paper, simulations are carried out for a double-circuit transmission line for different faults and for different compensation levels using Matlab/Simulink. This study is done on double-circuit transmission line feeding both industrial and residential customers. Simulation results are shown for different levels of compensation (15, 40, and 80%) with different faults (single-phase to ground and three phase). Voltage regulation and power generation are studied in the results to check effectiveness of series compensation. Improvement of voltage profile during transient and steady state shows the effectiveness of series compensation.