High Voltage Engineering

EE3701

HIGH VOLTAGE ENGINEERING

COURSE OBJECTIVES:

• Various types of over voltages in power system and protection methods.

• Generation of over voltages in laboratories.

• Measurement of over voltages.

• Nature of Breakdown mechanism in solid, liquid and gaseous dielectrics.

• Testing of power apparatus and insulation coordination.

UNIT I

OVER VOLTAGES IN ELECTRICAL POWER SYSTEMS

Causes of over voltages and its effects on power system - Lightning, switching surges and temporary over voltages - Reflection and Refraction of Travelling waves- protection against over voltages_ Insulation Coordination.

UNIT II

DIELECTRIC BREAKDOWN

Properties of Dielectric materials - Gaseous breakdown in uniform and non-uniform fields -Corona discharges Vacuum breakdown - Conduction and breakdown in pure and commercial liquids, Maintenance of oil Quality - Breakdown mechanisms in solid and composite dielectrics- Applications of insulating materials in electrical equipment.

UNIT III

GENERATION AND MEASUREMENTS OF HIGH VOLTAGES AND HIGH CURRENTS

Generation of High DC, AC, impulse voltages and currents - Analysis of DC/AC and Impulse generator circuits - Tripping and control of impulse generators, Measurement of High voltages and High currents - High Resistance with series ammeter - Dividers - Resistance, Capacitance and Mixed dividers - Peak Voltmeter, Generating Voltmeters, Electrostatic Voltmeters - Sphere Gaps, High current shunts- Digital techniques in high voltage measurement.

UNIT IV

HIGH VOLTAGE TESTING & INSULATION COORDINATION

High voltage testing of electrical power apparatus- International and Indian standards - Power frequency, impulse voltage and DC testing of Insulators, circuit breakers, bushing, isolators and transformers Insulation Coordination.

UNIT V

APPLICATION IN INDUSTRY

Introduction - electrostatic applications- electrostatic precipitation, separation, painting / coating, spraying, imaging, printing, Transport of materials - manufacturing of sand paper - Smoke particle detector - Electrostatic spinning, pumping, propulsion - Ozone generation - Biomedical applications.

TOTAL: 45 PERIODS

COURSE OUTCOMES:

Upon the successful completion of the course, students will be able to:

CO1: Explain various overvoltage's and its effects on power systems.

CO2: Understand the breakdown phenomena in different medium under uniform and non- uniform fields.

CO3: Explain the methodsof generating and measuring High DC, AC, Impulse voltage and currents.

CO4: Suggest and Conduct suitable HV testing of Electrical power apparatus as per Standards

CO5: Explain the Industrial Applications of Electrostatic Fields.

TEXT BOOKS

1. M.S.Naidu and V. Kamaraju, 'High Voltage Engineering', Tata McGraw Hill, Fifth Edition, 2013.

2. E. Kuffel and W.S. Zaengl, J.Kuffel, 'High voltage Engineering fundamentals', Newnes Second Edition, Elsevier, New Delhi, 2005.

3. C.L. Wadhwa, 'High voltage Engineering', New Age International Publishers, Fourth Edition, 2020.

REFERENCES

1. L.L.Alston, High Voltage Technology, Oxford University Press, First Indian Edition, 2006

2. C.L.Wadhwa, High voltage Engineering, New Age International Publishers, Fourth Edition, 2020

3. Mazen Abdel Salam, Hussein Anis, Ahdab A-Morshedy, RoshdayRadwan, High Voltage Engineering Theory & Practice, Second Edition, Taylor & Francis Gourp, 2019

4. Subir Ray." An Introduction to High Voltage Engineering "PHI Learning Private Limited, New Delhi, Second Edition-2011