High Voltage Engineering Fundamentals (Second edition)

High Voltage Engineering Fundamentals (Second edition)

by E. Kuffel, W.S. Zaengl and J. Kuffel

| Pages 539 | PDF | 4.4 MB |

Content,

Introduction

• Generation and transmission of electric energy 
• Voltage stresses 
• Testing voltages

Generation of high voltages

• Direct voltages
• Alternating voltages
• Impulse voltages
• Control systems

Measurement of high voltages

• Peak voltage measurements by spark gaps
• Electrostatic voltmeters
• Generating voltmeters and field sensors
• The measurement of peak voltages
• Voltage dividing systems and impulse voltage measurements
• Fast digital transient recorders for impulse measurements

Electrostatic fields and field stress control

• Electrical field distribution and breakdown strength of insulating materials
• Fields in homogeneous, isotropic materials
• Fields in multidielectric, isotropic materials
• Numerical methods

Electrical breakdown in gases

• Classical gas laws
• Ionization and decay processes
• Cathode processes – secondary effects
• Transition from non-self-sustained discharges to breakdown
• The streamer or ‘Kanal’ mechanism of spark
• The sparking voltage–Paschen’s law
• Penning effect
• The breakdown field strength (Eb)
• Breakdown in non-uniform fields
• Effect of electron attachment on the breakdown criteria
• Partial breakdown, corona discharges
• Polarity effect – influence of space charge
• Surge breakdown voltage–time lag

Breakdown in solid and liquid dielectrics

• Breakdown in solids
• Breakdown in liquids
• Static electrification in power transformers

Non-destructive insulation test techniques

• Dynamic properties of dielectrics
• Dielectric loss and capacitance measurements
• Partial-discharge measurements

Overvoltages, testing procedures and insulation coordination

• The lightning mechanism
• Simulated lightning surges for testing
• Switching surge test voltage characteristics
• Laboratory high-voltage testing procedures and statistical treatment of results
• Weighting of the measured breakdown probabilities
• Insulation coordination
• Modern power systems protection devices

Design and testing of external insulation

• Operation in a contaminated environment
• Flashover mechanism of polluted insulators under a.c. and d.c.
• Measurements and tests
• Mitigation of contamination flashover
• Design of insulators
• Testing and specifications

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