High voltage Engineering

3 Credits

6 Modules

Updated 12/31/2024

Introduction:

3 Lectures

Levels of voltages Electrical Insulation and Dielectrics Importance of Electric Field Intensity in the Dielectrics Types of Electric Fields Degree of Uniformity of Fields (Schwinger Factor) Stress Control.

Gaseous Dielectrics

Properties of atmospheric air and SF6 Related ionization Process Properties of vacuum Related ionization Process Development of Electron Avalanche Breakdown Mechanisms Townsend's Mechanism Streamer Mechanism Breakdown in Uniform Fields (Paschen's Law) Breakdown of gaseous dielectrics in Weakly Non uniform and the limiting value of η Development of 'Partial Breakdown' (PB) in Extremely Non-Uniform Fields Breakdown characteristics’ in air with stable PB (corona)

Liquid and Solid Dielectrics

6 Lectures

Classification and Properties of Liquid Dielectrics Classification and Properties of Solid Dielectrics Permittivity and Polarization in Dielectrics Insulation Resistance Conductivity and Losses in Dielectrics Partial Breakdown Phenomenon in Dielectrics Partial Breakdown Phenomenon on the Surfaces of Solid and Liquid Dielectrics Breakdown in Liquid and Solid Dielectrics Measurement of Intrinsic Breakdown in solid dielectrics Thermal and other Breakdown Mechanisms in extremely non-uniform fields Comparison of the development of breakdown in extremely and weakly non uniform fields and the requirement of time for breakdown in solid dielectrics.

Generation of High Test Voltages & Measurement techniques

12 Lectures

Generation of High Test Voltages & Measurement techniques Methods of generation of Power Frequency high test voltage Transformers in Cascade Resonance Transformers Generation of high dc voltage Voltage Multiplier Circuits and Ripple Minimization Sources of over voltages and Standard Lightning and Switching wave shapes Impulse Voltage Generator Analysis of Single Stage Circuit Multistage Impulse Generator and their Triggering Methods. Measurement of High Test Voltages i.e. Peak High Voltage measurement techniques Sphere gap; Effects of earthed objects and atmospheric conditions Electrostatic Voltmeters Principle and Construction Potential Dividers their types and applications

Non-destructive High Voltage Testing and Quality Control

3 Lectures

Measurable properties of dielectrics Measurement of Dielectric properties with Schering Bridge and Mega-ohm meter Partial Breakdown (PB) Measurement Techniques in Dielectrics/ Equipment.