电气工程专业术语

High Voltage Technology

Chapter 1

1.1 Dielectric polarization

(Electronic polarization, Ionic polarization, Orientation polarization, Interface polarization), Dipole

1.2 Permittivity (relative dielectric constant)

1.3 Dielectric conductivity

Ionic conductance

1.4 Dielectric dissipation (loss)

Dissipation or loss factor

Chapter 2 Mechanisms of gas discharge

2.1 Ionization in gases; Deionization in gases

Ionization by collision

Photo-ionization

Thermal ionization

Cathode processes

Electron Attachment: negative ion formation

Deionization in gases: Recombination of charged particles

2.2 Townsend and Stream mechanisms, Paschen’s law

Electron avalanche, self-sustained discharge,

2.3 Corona discharge

Non-uniform fields, strongly non-uniform fields

2.4 Breakdown in strongly non-uniform fields

Polarity effect

2.5 Lightning and thunder

Stepped leader, main discharge, afterglow (return) stroke

2.6 surface discharge

Flashover

Chapter 3 Electrical strength of gas gap

3.1 Time lag of breakdown

3.2 Volt-time characteristics

Breakdown under impulse voltage (lightning, switching)

3.3 Effect of atmospheric conditions

Temperature, pressure, (density), humidity

3.4 Breakdown voltages of gases in uniform fields

3.5 Breakdown voltages of gases in non-uniform fields

3.6 Approaches to improve electrical strength of gas gaps Improvement of electrode configuration

Increase of gas pressure

Vacuum gaps

High-electric-strength gases (SF6)

Chapter 4 Electrical strength of liquid and solid dielectrics

4.1 Mechanisms of breakdown in solid

Electronic breakdown

Thermal breakdown

Electrochemical breakdown

4.5 Mechanisms of breakdown in liquids

Cavity (bubble, impurity) breakdown

4.7 How to improve breakdown voltage of liquid (solid) dielectrics 4.10 Combination insulation

barrier-oil，oil-Kraft paper

Electrical field distribution

Chapter 5 and 6: Insulation test

Non-destructive test

Destructive test

5.1 Insulation resistance and dielectric absorption ratio

Chapter 7 Traveling waves process

7.1Traveling waves in single lossless lines

Wave impedance, wave velocity, wave equation

7.2 Reflection and refraction of traveling waves

Open circuit, short circuit, Example 7-1, 2, 3, 4

Peterson’s Rule (Thevenin’s Theorem)

7.3 Traveling waves against series inductors and parallel capacitors 7.4 Repeating reflection and refraction of traveling waves

The lattice diagram

7.5 Traveling waves in lossless parallel multi-lines

Mutual Wave impedance，coupling coefficient

7.6 Influence of corona on traveling waves