This course focuses on the high-voltage technology used in electric power apparatuses and electric machinery. The gas breakdown, discharge initiation, electric conduction and breakdown of liquid/solid/composite materials are shown. The generation of DC, AC, pulsed high-voltage and large current, measurement techniques, and surge voltage propagation and protection will be explained. The topics include electric power equipment (bushings, cables, switchgears, and arresters), high-voltage and large-current test equipment, accelerators, electric precipitators, ozone generators, and other applications.
By the end of this course, students will be able to: 1) understand the basic theory of high-voltage engineering, 2) explain the operating principles of high-voltage and large-power apparatuses or other electric machinery, 3) understand measurement and evaluation methods for high voltage or large current, and 4) compute the basic breakdown phenomena with MATLAB® and analyze the transient circuit phenomena in high-voltage and large-power apparatuses using LTspice®.
|✔ Applicable||How instructors' work experience benefits the course|
|In this lecture, an instructor, who has practical experience in the development and adjustment of high-voltage equipment for high-power laser equipment in a private company, will make use of his practical experience to conduct safe handling, design development, maintenance and inspection of high-voltage equipment for on-site work.|
high voltage, large current, insulator, dielectric breakdown, sparking voltage, impulse voltage, voltage divider, bushing, gas-insulated switchgear, arrester, electric precipitator, ozone generator.
|Specialist skills||Intercultural skills||Communication skills||✔ Critical thinking skills||Practical and/or problem-solving skills|
|✔ ・Applied specialist skills on EEE|
The class proceeds with the course text book. A high-voltage lab tour, numerical simulations of transient circuits, and exercise problems related to the lecture will be provided. A summary of the topics and learning outcomes of each class will also be given. Handbook® is used for preparation, review purposes, and active learning.
|Course schedule||Required learning|
|Class 1||Overview, elementary processes of discharge phenomena (atomic collision, excitation, ionization, attachment, recombination, drift, and diffusion).||Peruse chapters 1 – 2 of the course textbook. Students shall answer end-of-chapter questions in Chapter 2 and their similar ones.|
|Class 2||Gas discharge / breakdown (impact ionization coefficient, Townsend theory, streamer theory, Paschen's law, electrode shape and discharge characteristics, voltage waveform and discharge characteristics).||Peruse sections 3.1 – 3.5. Students shall answer end-of-chapter questions 1 – 5 in Chapter 3 and their similar ones.|
|Class 3||Gas discharge / breakdown 2 (Lightning discharge, lightning shield, high-gas pressure, vacuum, negative gas, mixed gas, high- frequency electric field)||Peruse sections 3.6 – 3.12. Students shall answer end-of-chapter questions 6 – 9 in Chapter 3 and their similar ones.|
|Class 4||Steady gas discharge (glow discharge, voltage-current characteristics, arc discharge, their applications). Explanation and exercise of Boltzmann equation solver, free-software BOLSIG+.||Peruse chapter 4. Students shall answer end-of-chapter questions in Chapter 4 and their similar ones and use the software BOLSIG+.|
|Class 5||Discharge of liquids and solids (electrical conduction of liquids and solids, generation of charged particles, space charge effect, dielectric breakdown of liquids and that of solids).||Peruse chapter 5. Students shall answer end-of-chapter questions in Chapter 5.|
|Class 6||Discharge of composite dielectric 1 (electric field in composite dielectric, creeping discharge, fouling creepage flashover), and Lab-tour of ion beam sources and accelerators as high-voltage equipment (Van de graf type accelerator, linear accelerator including injector).||Peruse sections 6.1 – 6.3. Students shall answer end-of-chapter questions in Chapter 6. Understand real high-voltage apparatus.|
|Class 7||Composite dielectric discharge 2 (void discharge, tree, oil immersion insulation, discharge barrier effect), confirmation of understanding and summary of the first half.||Peruse sections 6.4 – 6.7. Self-evaluate achievement.|
|Class 8||High-voltage or large-current generation (large AC current, large DC current, large pulsed current by capacitor discharge).||Peruse sections 3.6–3.9. Analysis of high-voltage or large-current circuit using LTspice.|
|Class 9||Measurements of high voltage or large current (high DC voltage, high AC voltage, high impulse voltage, large current, partial discharge, discharge phenomena).||Peruse sections 4.1–4.7 of textbook II. Transient circuit analysis with LTspice.|
|Class 10||Measurements of high-voltage or large current (bushing, insulator, high-voltage power cable, rotating equipment, gas insulated switchgear).||Peruse sections 5.1–5.6 of textbook II.|
|Class 11||Overview of high-voltage apparatuses (vacuum interrupter, arrestor, transformer, capacitor).||Peruse sections 5.7–5.10 of textbook II.|
|Class 12||High-voltage surge generation, propagation, and protection in power system (over voltage, lightning overvoltage, protection).||Peruse sections 6.1–6.3 of textbook II.|
|Class 13||High-voltage breakdown test.||Peruse sections 7.1–7.10 of textbook II.|
|Class 14||Applications of high-voltage engineering (accelerator, electron microscope, electric discharge machineozone generator, hybrid DC circuit breaker, electric precipitator).||Peruse sections 8.1–8.8 of textbook II.|
I: Kunihiko Hidaka, “High voltage engineering”, Suurikougakusha, ISBN: 978-4-901683-59-3. (Japanese)
II: Tatsuo Kawamura, Teruya Kawano, Satoshi Yanabu, “High voltage engineering”, IEE Japan, ISBN: 978-4886862372. (Japanese)
R. Hanaoka, “High voltage engineering”, Morikita Publishing Co., Ltd., ISBN: 978-4627742512 (Japanese), O. Yamamoto, S. Hamada, “High voltage engineering”, Ohmsha, ISBN: 978-4274214448 (Japanese).
Students' course scores are based on midterm exams (50%) and final exams (50%).
Students must have successfully completed the following classes or have equivalent knowledge.
Electricity and Magnetism I(EEE.E201), Electricity and Magnetism II(EEE.E202), Electric Circuits I(EEE.C201), Electric Circuits II(EEE.C202)