06EE764 - Insulation Engineering (2006 - 2007) |
PART – A |
UNIT – I ELECTROSTATIC FIELD, THEIR CONTROL AND ESTIMATIONS |
Electric Field Intensity, Electric Strength, Classification of Electric Fields,
Degree of Uniformity of Electric Fields, control of Electric field Intensity
(stress control), Estimation of Electric Field Intensity, Basic Equations for
potential and Field Intensity in Electrostatic Fields, Analysis of Electric Field
Intensity in Homogeneous Isotropic single dielectric only direct solution of
Laplace equation, Analysis of Electric field Intensity in Isotropic
Multidielectric system. |
UNIT – II INSULATION SYSTEM IN POWER SYSTEM APPARATUS |
Insulation
system in capacitors, bushings, and transformers modes of failure of
insulation systems. Insulation in rotating machines. |
UNIT – III DIELECTRIC PHENOMENA |
Dielectric phenomena in in solid insulation.
Macroscopic approach for describing the Dielectric phenomena microscopic
treatment for Dielectric phenomena. |
UNIT - IV PROPERTIES OF INSULATION MATERIALS |
Introduction to
properties of solid insulating materials (both of natural origin and synthetic
types) Properties of liquid insulating materials. |
PART – B |
UNIT – V GASEOUS INSULATION |
Requirement of gaseous insulation. Breakdown
process: types of collision, Elastic and inelastic, collision cross-section,
Mobility of ions, Diffusion of charges, Emission of radiation and excitation,
various secondary process and recombination, Mobility controlled and
diffusion controlled breakdown. |
UNIT – VI AGEING PHENOMENA |
Failure of electric insulation due to ageing.
Ageing mechanisms- Thermal ageing, Electrical ageing, combined thermal
and electrical ageing. |
UNIT – VII |
Analysis of insulation failure date Power law model, Graphical estimation of
power law constants, ageing date, plotting position and cumulative
probability.
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REFERENCE |
TEXT BOOKS: |
1. “Fundamentals of gaseous ionization and plasma electronics”-
Nasser E. John Wiley Interscience, New York, 1971.
2. “Methods of statistical analysis and life data”- Hann N.R. Schafer
R.E. and Singapore wall N.D. John Wiley and sons, New York,
1974.
3. “Theory of electric polarization”- Bother C.J.F. Elsevier
Publications.
4. “High Voltage Insulation Engineering” -Ravindra Arora,
Wolfgang Mosch, New age International Publishers Ltd.
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Reference Books |
1. “Electrical insulation”- Bradwell A. Peter Peregrinus Ltd, London,
1993.
2. Electrical breakdown of gass”- J.M. Meek and J.D. Craggs,
“Oxford university press, 11953
3. “High voltage Engineering fundamentals”-E. Kufell and W.S.
Zaengl, and J. Kufell, 2nd edition, Elsevier 2005
4. “High voltage Engineering”-M.S. Naidu and V Kamaraju, 3rd
edition, TMH, 2007.
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