Checking date: 09/05/2018


Course: 2019/2020

High voltage engineering
(14001)
Study: Bachelor in Electrical Power Engineering (222)


Coordinating teacher: MARTINEZ TARIFA, JUAN MANUEL

Department assigned to the subject: Department of Electrical Engineering

Type: Electives
ECTS Credits: 6.0 ECTS

Course:
Semester:




Students are expected to have completed
Fundamentos de Ingeniería Eléctrica Líneas eléctricas y aparamenta Circuitos Magnéticos y Transformadores
Competences and skills that will be acquired and learning results. Further information on this link
-Understanding essential properties of electrical insulating materials. -Knowledge about degradation mechanisms acting on insulating materials. -Analysing the interaction between different degradation mechanisms enhancing premature ageing of electrical equipment. -Understanding the behaviour of High Voltage (HV) generation and measurement circuits. -Calculating electrical stresses applied to one insulating material taking into account the knowledge of its design. -Getting useful information about acceptance and maintenance tests that certify the insulation status of electrical equipment subjected to High Voltages.
Description of contents: programme
Theoretical sessions. 1. Introduction. 1.1. High Voltage equipment. 1.2. Electrical, thermal and mechanical stresses applied to electrical equipment. 1.3. Insulation coordination. 1.4 Asset Management. 2. Electrical insulating materials. 2.1. Insulating gases. 2.1.1. Ionization process. 2.1.2. Air. 2.1.3. SF6 and other gases. 2.1.4. Applications 2.1.5. Degradation processes. 2.2. Insulating liquids. Applications and degradation processes. 2.3. Insulating solids. 2.3.1. Breakdown at insulating solids. 2.3.2. Applications. 2.3.3. Degradation mechanisms. 2.3.4. Partial discharges (PD) and tg delta. Equivalent circuit. 3. Devices for insulation tests. 3.1. High voltage generation circuits: AC, DC and impulse tests. 3.2. HV measurement circuits. 4. Insulation systems design. 4.1. Electrical stresses analysis in simple geometries. 4.2. Dielectric strength in common materials. 4.3. Oil-paper impregnation process. VPI treatment for rotating machines. 5. Degradation mechanisms in electrical equipment. 5.1. General issues. 5.2. Insulated power cables. 5.3. Insulators and bushings 5.4. Aerial conductors. 5.5. Switchgears. 5.6. Power transformers. 5.7. Rotating machines. 6. Maintenance tests for insulation status evaluation. 6.1. Insulation resistance measurement. Polarization index. Applications to different equipment. 6.2. AC and DC withstanding voltages. 6.3. Lightning and switching impulses tests. Surge tests. 6.4. Capacitance and tg delta measurement. Applications to different equipment. 6.5. PD measurements. Applications to different equipment. 6.6. Specific evaluation methods for transformers. 6.7. Specific evaluation methods for generators. 6.8. Fault location in power cables. Practical sessions: 1.- Introduction to the HV laboratory and safety rules. Impulse tests. 2.- Insulation resistance measurements in power transformer and surge tests measurements in one rotating machine. 3.- Capacitance and tg delta measurements. 4.- PD tests. Surface and volumetric resistance measurements.
Learning activities and methodology
- Learning in big groups (theoretical approach), learning in small groups (solving doubts), individual meetings to solve doubts (ask for them by email), individual student work. Theoretical knowledge (3 ECTS). - Laboratory learning (4 sessions), learning in small groups (solving practical problems), individual meetings to solve problems (ask for them by email), individual student work. Practical knowledge (3 ECTS).
Assessment System
  • % end-of-term-examination 40
  • % of continuous assessment (assigments, laboratory, practicals...) 60
Basic Bibliography
  • J.A. Martínez Velasco ,. Coordinación de aislamiento en redes eléctricas de Alta Tensión,. McGraw Hill.
  • Khalifa M.;. High Voltage Engineering. Theory and Practice,. Marcel Dekker.
  • Kreuger F.H.;. Partial Discharge Detection in High-Voltage Equipment,. Butterworth & Co..
  • P. Gill;. Electrical Power Equipment Maintenance and Testing;. Marcel Dekker.
  • R.E. James, Q. Su;. Condition assessment of High Voltage Insulation in Power System Equipment;. Institution of Engineering and Technology;.
  • Stone G., Boutler E.A., Culbert I., and Dhirani H.;. Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing and Repair;. IEEE Press Series on Power Engineering, Wiley Interscience.
Additional Bibliography
  • D. Kind and H. Kärner;. High-voltage insulation technology : textbook for electrical engineers;. Braunschweig : Vieweg;.
  • E. Kuffel, W.S. Zaengl, and J. Kuffel;. High Voltage Engineering: Fundamentals;. Butterworth-Heinemann;.
  • H.M. Ryan ;. High Voltage Engineering and Testing;. Institution of Electrical Engineers.
  • N.H. Malik;. Electrical Insulation in Power Systems;. Marcel Dekker.
  • R. Bartnikas and E. J. McMahon;. Engineering Dielectrics;. ASTM American Society for Testing and Materials;.
  • R.W. Sillars;. Electrical Insulating Materials and their Applications;. Ann Arbor, University Microfilms International;.
  • T.J. Gallagher and A.J. Pearmain;. High voltage: measurement, testing, and design;. Wiley.

The course syllabus and the academic weekly planning may change due academic events or other reasons.