Unit 1

Unit 2

Capacitance of three phase transmission line – single and double circuit lines – symmetrical and unsymmetrical spacing – bundled conductors -Performance of transmission lines – Efficiency and regulation – Short, medium and long lines – ABCD constants – Ferranti effect – surge impedance – Real and reactive power flow in transmission lines – shunt and series compensation – corona loss. Cables – Construction and characteristics of single and three core cables – Insulation resistance and capacitance of a single core cable, most economical conductor size -Grading of cables.

Unit 3

Insulators – types – voltage distribution in suspension type insulators – string efficiency – Grading of insulators – Mechanical design of transmission lines – sag and span – supports at same level and different levels – sag template and stringing chart – Substations – types, general layout, Neutral grounding, Distribution systems: comparison of distribution systems – radial and ring – two wire dc, ac single phase and three phase systems – current and voltage calculations in distributors with concentrated and distributed loads.

• Kothari D. P. and Nagrath I. J., “Modern Power System Analysis” Tata McGraw Hill Publishing Company, 2003.

• Wadhwa C L, “Electrical Power System”, Wiley Eastern Limited, India, 2007.
• Hadi Saadat, “Power System Analysis” McGraw Hill Publishing Company, 2003.
• B. R. Gupta, “Power System Analysis and Design”, Third Edition, S. Chand & Company Ltd., 2004.
• Grigsby. L. L, “Electrical Power Engineering Handbook”, IEEE Press, 2001.