HIGH VOLTAGE TECHNIQUES

Content

Weeks	Topics
1. Weeks	Introduction about High Voltage Concepts, Electric Field Stresses, Insulators
2. Weeks	Introduction about High Voltage Concepts. Breakdown in Solids and Liquids. Estimation and Control of Electric Stress Surge Voltages
3. Weeks	Conduction and Breakdown in Gases. Gases as insulating media and Ionization. Townsend’s Current growth equation and Current growth in the presence of secondary processes. Townsend’s criterion for breakdown. Experimental determination of coefficients α and γ (homework). Breakdown in electronegative gases and Time lags for breakdown. Streamer theory for breakdown in gases Paschen’s law. Breakdown in non-uniform fields and corona discharges. Vacuum insulation
4. Weeks	Conduction and Breakdown in Liquids and Solids. Liquids as insulating media. Pure liquids and commercial liquids. Conduction and breakdown in pure liquids. Conduction and breakdown in commercial liquids. Introduction to breakdown in solid dielectrics. Breakdown of solid dielectrics in practice. Breakdown in composite dielectrics. Solid dielectrics used in practice
5. Weeks	Applications of Insulating Materials. Introduction Applications in Power Transformers. Applications in Rotating Machines. Applications in Circuit Breakers. Applications in Cables. Applications in Power Capacitors. Applications in Electronic Equipment
6. Weeks	Generation of High Voltages and Currents. Generation of High DC Voltages. Generation of High AC Voltages. Generation of Impulse Voltages. Generation of Impulse Currents. Tripping and Control of Impulse Generators
7. Weeks	Measurement of High Voltages and Currents. Measurement of High DC Voltages. Measurement of High AC Voltages. Measurement of High Impulse Voltages. Measurement of High DC, AC and Impulse Currents. Cathode Ray Oscillographs for Impulse Voltage and Current
8. Weeks	Overvoltage Phenomenon and Insulation Coordination. Natural Causes for Overvoltages - Ligtning Overvoltage Due to Switching Surges, System Faults and Other Abnormal Conditions. Principles of Insulation Coordination on High Voltage and Extra High Voltage Power Systems
9. Weeks	Non-Destructive Testing of Materials and Electrical Devices. Introduction Measurement of DC. Resistivity Measurement of Dielectric Constant and Loss Factor Partial Discharge Measurements
10. Weeks	High Voltage testing of Electrical Devices. Testing of Insulators and Bushings. Testing of Isolators and Circuit Breakers. Testing of Cables. Testing of Transformers. Testing of Surge Diverters. Radio Interference Measurements
11. Weeks	Design, Planning and Layout of High Voltage Laboratories. Introduction Test Facilities Provided in High Voltage Laboratories. Activities and Studies in High Voltage Laboratories. Classification of High Voltage Laboratories. Size and Ratings of Large Size High Voltage Laboratories. Grounding of Impulse Testing Laboratories
12. Weeks	Homework Presentations of Students
13. Weeks	Homework Presentations of Students
14. Weeks	Homework Presentations of Students