Transmission line parameters – resistance, inductance and capacitance calculations - single phase and three phase lines – double circuit line - effect of earth on transmission line capacitance


Performance of transmission lines – regulation and efficiency – tuned power lines power flow through a transmission line – power circle diagrams, formation of corona – critical voltages – effect on line performance


Mechanical design of overhead lines – line supports – insulators - voltage distribution in suspension insulators – string efficiency - testing of insulators stress and sag calculation – effects of wind and ice loading


Underground cables – comparison with overhead line – types of cables – insulation resistance – potential gradient – capacitance of single core and three core cables


Distribution systems – general aspects – Kelvin's Law, A.C. distribution – single phase and three phase - techniques of voltage control and power factor improvement, recent trends in transmission and distribution systems


References :

1. Wadhawa, C.L. „Electrical Power Systems‟, New Age International Publishers, 6th edition, 2009

2. D. P. Kothari and IJ Nagrath, „Power System Engineering‟ Tata Mcgraw – Hill, 2nd edition, 2008

3. Gupta B.R.,' Power system Analysis & Design', S. Chand and Company Ltd.,2nd edition, 2008