Simulation of HVAC Transmission Line

The teaching of transmission lines at both undergraduate and postgraduate levels has been a popular topic in many electrical engineering courses. The teaching method used for delivering these courses was based on identifying the equivalent circuits and using mathematical analysis. Such approach will be difficult tasks for the students when dealing with a wide range of electrical components in a circuit. In the last decade or so circuit simulation has played a major role in facilitating the teaching of transmission lines at all levels.The Simulated transmission line used for this paper is HVAC transmission line of 180 km length. The transmission line may be simulated as a 3-phase of 180 km length or a simulated single phase transmission line of 540 km length. The 180 km transmission line is divided into 6 π sections where each π section is 30 km long. The line inductance is considered for every 30 km and the line capacitance considered for every 15 km. The actual values of the line parameters (RLC) of 400KV transmission line are: 0.02978 Ω/km, 1.06 mH/km and 0.0146 µF/km, respectively. The power carried by the transmission line is 250W.