Using Series Capacitors for the Improvement and Evaluation of Transmission Line Utilization

Abstract

The increase of power demand in recent years have developed a number of challenges for power system engineers for
increasing the power transfer capability of the already installed transmission system without the expansion of the existing
transmission network. This is where FACTS (Flexible ac Transmission System) devices are very useful because of its low
initial cost as compared to setting up a completely new transmission network. The FACTS technology makes use of the already
installed generating and transmission systems with minimum line losses and maximum use of the existing system. This paper
analyzes the importance of Series Capacitance for the improvement of transmission line utilization. The circuit for a generic grid
system was designed using Simulink software. The system was tested for different load configurations. Calculation for bus voltages,
currents and other parameters were performed before and after series compensation using Matlab software. It was found out that the
Power transfer capability (PTC) of the circuit improved after using FACTS devices.