LESSON PLAN LP-EE Sub Code: EE 2353 Sub Name: HIGH VOLTAGE ENGINEERING Unit: I Branch: EEE Semester: VI
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1 Unit: I Branch: EEE Semester: VI Page 1 of 6 OVER VOLTAGES IN ELECTRICAL POWER SYSTEMS Causes of over voltages and its effect on power system Lightning, switching surges and temporary over voltages - protection against over voltages-bewley lattice Diagram To understand the various types of over voltages in power system and protection methods. 1. Introduction about high voltage engineering - Nature of causes of Over voltages 2. Lightning Phenomenon- Mechanism of Lightning strokes 3. Mathematical model for lightning Computation of induced voltages 4. Overvoltage due to switching surges Origin Characteristics Switching Overvoltages in EHV and UHV systems 5. Power Frequency Overvoltages in power systems 50 1,2,3 BB 6. Control of Overvoltages due to Switching 7. Protection of Transmission lines against Overvoltages 8. Bewley lattice Diagram
2 Unit: II Branch: EEE Semester: VI Page : 2 of 6 ELECTRICAL BREAKDOWN IN GASES, SOLIDS AND LIQUIDS Gaseous breakdown in uniform and non-uniform fields Corona discharges Vacuum breakdown - conduction and breakdown in pure and commercial liquids breakdown mechanisms in solid and composite dielectrics. Nature of Breakdown mechanism in solid, liquid and gaseous dielectrics discussion on commercial insulation's 9 Gases as insulating media Collision processes Ionization processes 10 Townsend s Current Growth Equations and 50 1,2,3 BB problems. 11 Townsend s Current Growth problems. 12 Townsend s Criterion for Breakdown and Breakdown in electronegative gases. 13 lags for Breakdown and Streamer theory of breakdown in gases. 14 Paschen s law and Breakdown in nuniform fields and Corona discharges. 15 Vacuum Breakdown - Mechanisms 16 Conduction and Breakdown in Liquid Dielectrics Introduction and classifications & Characteristics. 17 Pure liquids and Commercial liquids Introduction, Conduction and breakdown in Pure liquids. 18 Conduction and Breakdown in Commercial Liquids 19 Intrinsic Breakdown Electronic Breakdown Avalanche Breakdown Thermal Breakdown 20 Breakdown Mechanism in Solid Dielectrics 21 Breakdown of Solid Dielectrics in practice 22 Breakdown in Composite Dielectrics 23 Mechanisms of Breakdown in composite Dielectrics
3 Unit: III Branch: EEE Semester: VI Page : 3 of 6 GENERATION OF HIGH VOLTAGES AND HIGH CURRENTS Generation of High DC, AC, impulse voltages and currents. Tripping and control of Impulse generators. Generation of High voltages and currents in laboratories. 24. Generation of High Direct Current Voltages HWR and FWR circuits Voltage Doubler Circuits 25. Voltage Multiplier Circuits and Cascade form of voltage multiplier 26. Electrostatic Machines Van de Graaff Generators and Problems. 50 1,2,3 BB 50 1,2,3 BB 27. Electrostatic Generators Introduction. 28. Generation of High Alternating Voltages Cascade Transformers 29. Resonant Transformers 30. Generation of impulse Voltages 50 1,2,3 BB 31. Analysis of Impulse Generator Circuit 32. Generation of Impulse Currents 33. Tripping and Control of Impulse Generators
4 Unit: IV Branch: EEE Semester: VI Date: 2/1/2015 Page 4 of 6 MEASUREMENT OF HIGH VOLTAGES AND HIGH CURRENTS Measurement of High voltages and High currents digital techniques in high voltage measurement. Measurement of High voltages and Currents. 34. Introduction to Measurement of High DC voltages 35. Generating Voltmeters Principle Advantages Limitations 36. Measurement of High Alternating voltages 37. Capacitance Voltage Transformers Potential Transformers 38. Sphere gap measurement 39. Measurement of High Power Frequency Alternating currents,measurement of High Direct currents 40. Measurement of High Impulse Currents 41. CRO for Impulse Voltage and Current Measurements (Digital Techniques) and problems.
5 Unit: V Branch: EEE Semester: VI Date:26/11/2014 Page 5 of 6 HIGH VOLTAGE TESTING & INSULATION COORDINATION High voltage testing of electrical power apparatus power frequency, impulse voltage and DC testing International and Indian standards Insulation Coordination. Testing of power apparatus and insulation coordination 42. Introduction to Testing and definition of terms. 43. Testing of Insulators - Power Frequency and Impulse Voltage Tests 44. Testing of Bushings - Power Frequency and Impulse Voltage Tests 45. Testing of Isolators and Circuit Breakers 46. Testing of Transformers 47. Testing of Surge Arresters 48 Testing of cables,international and Indian standards 49. Principles of Insulation Coordination on HV and EHV power systems 50 1,2,3, PPT
6 Branch: EEE Semester: VI Page 6 of 6 Course delivery plan: Weeks I II I II I II I II I II I II I II I II I II I II I II I II I Units TEXT BOOKS 1. M. S. Naidu and V. Kamaraju, High Voltage Engineering, Tata McGraw Hill, 3rd Edition, REFERENCES: 2. E. Kuffel and W. S. Zaengel, High Voltage Engineering Fundamentals, Pergamon Press, Oxford, London, L. L. Alston, Oxford University Press, New Delhi, First Indian Edition, Prepared by Approved by Signature Dr.M.Gopalakrishnan Name I. Venkatraman Dr.K.R.Santha Designation Date Professor-EE Asst.Prof-EE HOD-EE
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