Structure of Power System – Parameters of single and three-phase transmission lines with single and double circuits -Resistance, inductance and capacitance of solid, stranded and bundled conductors, Symmetrical and unsymmetrical spacing and transposition – application of self and mutual GMD; skin and proximity effects -Typical configurations, conductor types and electrical parameters of EHV lines.

Performance of Transmission lines – short line, medium line and long line – equivalent circuits, phasor diagram, attenuation constant, phase constant, surge impedance – transmission efficiency and voltage regulation, real and reactive power flow in lines – Power Circle diagrams – Formation of Corona – Critical Voltages – Effect on Line Performance.

Mechanical design of OH lines – Line Supports –Types of towers – Stress and Sag Calculation – Effects of Wind and Ice loading. Insulators: Types, voltage distribution in insulator string, improvement of string efficiency, testing of insulators.

Underground cabilitys – Types of cabilitys – Construction of single-core and 3 core Cabilitys – Insulation Resistance – Potential Gradient – Capacitance of Single-core and 3 core cabilitys – Grading of cabilitys – Power factor and heating of cabilitys– DC cabilitys.

Distribution Systems – General Aspects – Kelvin’s Law – AC and DC distributions – Techniques of Voltage Control and Power factor improvement – Distribution Loss –Types of Substations -Methods of Grounding – Trends in Transmission and Distribution: EHVAC, HVDC and FACTS (Qualitative treatment only).