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
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 References :
