ADVANCED HIGH VOLTAGE TECHNIQUE

Assistant Professor Suna BOLAT

Office: ee 106

Phone: 366 2197

EE 552 ADVANCED HIGH VOLTAGE TECHNIQUE

Graduate

Semester Spring

Credit Hr (3,0) 3

Timetable

Period Mon Tue Wed Thu Fri Sat. 08:30 09:30 10:30 11:30 EE 552 12:30 EE 552 13:30 EE 552 14:30 15:30 16:30 17:30 18:30

Students’ free time who take this course

Period Mon Tue Wed Thu Fri 08:30 Occupied(1) Occupied(3) Occupied(1) 09:30 Occupied(2) Occupied(1) Occupied(2) Occupied(5) Occupied(1) 10:30 Occupied(1) Occupied(3) Occupied(2) Occupied(4) Occupied(5) 11:30 Occupied(1) Occupied(3) Occupied(5) Occupied(4) 12:30 Occupied(5) Occupied(2) Occupied(1) 13:30 Occupied(5) Occupied(2) Occupied(1) 14:30 Occupied(2) Occupied(3) Occupied(2) 15:30 Occupied(2) Occupied(3) Occupied(1) Occupied(2) 16:30 17:30 18:30

Catalog description

1. INSULATION PRINCIPLES & OVERVOLTAGES

Insulation principle in high voltage equipment.

Overvoltages and lightning discharges in high voltage systems.

2. PARTIAL DISCHARGES

Partial discharges. Computation of phase resolved partial discharge patterns.

Corona discharges and corona loss calculations.

Overvoltage limiting devices and protection.

Learning outcomes

After this course, the student should be able to: • Describe the principles behind insulation systems • Discuss overvoltages and their effects • Develop equivalent circuits models for different transient in a high

voltage system • Describe the measurement principles for corona loss and partial

discharges • Compute phase resolved partial discharge patterns from simple

models • Discuss the protection principles and devices against the

overvoltage, • Select appropriate protection devices and location against the

overvoltage.

Learning method

Classroom instruction includes tutorial sessions.

Students are encouraged to contact the course instructor during her office hours to discuss points they find difficult to understand.

During the course there will be homework assignments, term projects (oral presentation), some laboratory exercises and exams to measure understanding of students.

Office hours: ??

Grading policy

Do you have any other opinions on that?

Homework 10 Term project (oral presentation)

25

Lab. Exercise 10 Midterm exam 25 Final Exam 35

NG policy

Attendance is required. Students who attend less than 60% and who do not take exams receive an NG grade.

Make-up&Re-sit

• There will be no make-ups for any of the classroom activities!

• Students who miss either the midterm exam or the final exam with legitimate and documented excuses, may be eligible for the re-sit exam. In order to be able to take re-sit exam, valid documentation should be provided to the Department Administration within 3 working days of the scheduled exam that is missed. It is not conclusive that you can get a make-up exam. That depends on the departmental decision.

• Student who got an NG grade cannot take Re-Sit exam!

Homeworks&assignments

• You are expected to submit YOUR OWN WORK for all assignments and activities. You may consult with your fellow students and discuss each assignment. However, final work you submit must be your own.

• NO plagiarism!

• You should submit your homework at the exact deadline. If you are going to miss a deadline of a homework, you must inform the instructor ahead of time so that a suitable date should be arranged.

• For the papers that are not submitted on time, penalty is 10 points of deduction from the grade for each day!

Course instructions

• My approach is to encourage the student to learn how to learn. To take ownership of the learning process: Initiative, involvement, interactive participation are the keys to an effective learning experience.

• Please keep me informed if you do not feel that I have been successful in this goal. Do not wait until evaluation time to express your frustration ;)

• I want to listen to your concerns or difficulties with the material, and am always available to help you outside the classroom.

References

RECOMMENDED READING

E. Kuffel and W.S. Zaengl, High Voltage Engineering Fundamentals, Second Edition,

Pergamon Press, 1984, ISBN: 0-08-024213-X

A. Haddad and D. F. Warne, Advances in High Voltage Engineering, Inst. of Engineering &

Technology, 2009, ISBN-13: 978-0852961582

M.S. Naidu and V. Kamaraju, High Voltage Engineering, Second Edition, McGraw–Hill, 1996,

ISBN: 0-07-462286-2

H. M. Ryan and G. R. Jones, SF6 Switchgear, IEE Power Engineering Series 10, Peter

Peregrinus, 1989, ISBN: 0-86341-123 1.

D. Kind and H. Kärner, High Voltage Insulation Technology, Vieweg, 1985, ISBN: 3-528-

08599-1.

Tentative content and schedule

WEEK DESCRIPTION

1 Introduction, Review of basic concepts: Over voltage, Withstand voltage, Insulation, Insulation

level, Protection level, Discharge and breakdown phenomena

2-3 Overvoltages in high voltage systems: Classification and effects of overvoltages. Internal

overvoltages: power frequency overvoltages; short-circuits and their effects.

4 Internal overvoltages: Switching overvoltages. Transients in RL circuit, RC circuit, RLC circuit

5-6

External overvoltages: Overvoltages as a consequence of direct lightning strokes. Lightning

discharge, Lightning voltage and current. Effects of lightning. Standard impulse voltage,

generation of impulse voltage, Marx generators.

7-8 Partial discharges: Types of partial discharges. Measurement principles behind partial

discharges. Computation of phase resolved partial discharge patterns from simple models.

9 Corona discharges: Effects of corona,Corona loss calculations.

10 Overvoltage limiting devices: High voltage insulators, Bushings, Switchgears

11 Protection against overvoltages: protection devices, lightning arresters

12 Insulation coordination: definitions, withstand and protection levels, statistical evaluation.

Term project

1. Find a paper!

(or write a paper... even better)

Computation of phase resolved partial discharge patterns.

Corona discharges and corona loss calculations.

2. Bring it to me, so that we can discuss.

3. Write a report (might be like a paper in IEEE format.)

4. Present your work.

My plan

• I plan to have you conduct the topics on partial discharge and corona.

• You are engineers, do not complain!

• We might make the final exam in the way of take-home, we’ll discuss it when it’s time ;)

Your information

• Please give me the detailed information about your previous and current studies before you leave.

Create an e-mail group for me, so that we can keep in touch when needed.