Introduction to over voltages phenomenon in power system: transient on transmission lines: infinite line definition and its transient behavior, finite line analyses, analysis for different line terminations, problems. Bewely lattice diagram, problems.
Use of transients network analyzer, digital and hybrid computers for solving large scale problems, characteristics of lightning discharges, theory of cloud formation origin of lightning, iso-Keronic level, leader development, return stroke, different types of lightning interaction, back flash over
Shielding angle calculation for line, grounding rods, counter poise, problems, origin and characteristics of switching over voltages and temporary over voltages, problems of switching surges.
Behavior of apparatus and line insulation under all types of over voltages, concept of BIL, protection of apparatus against over voltages, surge arresters, insulation co-ordination