Module overview
This module provides a systematic understanding of knowledge and critical awareness of issues related to the management and design of high voltage insulation systems. The course introduces a number of topics related to the design and testing of insulation systems and breakdown phenomena in insulation materials. The students will also be exposed to research activities undertaken within the Tony Davies High Voltage Laboratory. The lectures (seminars) are intended to support student self learning activities and it is expected that the students should make use of a wide range of information resources including current IEC standards and research papers. Two assessment activities are designed to provide scope for students to work as a team (bushing insulation design) and individually (partial discharge classification). A range of skills, including technical (electric field simulation and programming) and transferable skills (presentation) are required to complete the two assignments.
Students are not required to have taken ELEC3211 before taking ELEC6225, but it is strongly recommended.
Aims and Objectives
Learning Outcomes
Subject Specific Practical Skills
Having successfully completed this module you will be able to:
- Design insulation system according to IEC standards
- Record your work accurately
- Demonstrate an appreciation of risk and safe laboratory practice.
- Undertake practical work in order to obtain data pertinent to a defined task.
Transferable and Generic Skills
Having successfully completed this module you will be able to:
- Organise your time to meet defined objectives.
- Work efficiently and effectively as a team.
- Communication and presentation skills
Subject Specific Intellectual and Research Skills
Having successfully completed this module you will be able to:
- Learn a comprehensive range of testing and measurement techniques to characterise insulation materials
- Expose to frontier research activities in high voltage insulation
- Acquire knowledge of partial discharges, condition monitoring, space charge measurement and insulation quality assessment
- Acquire knowledge of electric field modelling and electric field control
Knowledge and Understanding
Having successfully completed this module, you will be able to demonstrate knowledge and understanding of:
- Exposure to a range of insulation materials and composites used in HV insulation systems and their electrical properties
- Different requirements and compromised decision in practice when selecting insulation materials
- How electronic structure leads to materials with different macroscopic properties
Syllabus
Insulation System Design, Electrical Breakdown and Materials (8 Lectures).
- Review of electrical insulating materials, properties, composites, use in HV equipment, partial discharges, space charge, material ageing, charge transport in polymers, surface and bulk breakdown processes. Cable, transformer, capacitors and Bushing Insulation design and stress control.
HV Testing and Measurement Techniques (6 Lectures)
- International, BSI and IEEE Standards. Partial discharge, capacitance tan delta, withstand, lightning impulse etc. Material based of current IEC standards. Condition monitoring and assessment of HV insulation systems. Space charge measurements with pulsed-electro-acoustic method.
Research Issues (6 lectures)
- Solid Insulation: Electrical treeing and short-term breakdown processes, test geometries, environmental factors. Short term breakdown tests. Condition assessment, partial discharge detection and characterisation. New materials for HV insulation.
- Liquid Insulation: Discharges in oil, DGA and degradation of transformer oil.
- Gas Insulation: Production of corona, plasma, problems and applications
Electrical Field Control and Insulation Design (4 lectures)
- Bushing design, cable insulation design
Learning and Teaching
| Type | Hours |
|---|---|
| Tutorial | 4 |
| Completion of assessment task | 66 |
| Lecture | 24 |
| Wider reading or practice | 32 |
| Preparation for scheduled sessions | 12 |
| Follow-up work | 12 |
| Total study time | 150 |
Resources & Reading list
Textbooks
F.H. Kreuger (1991). Industrial High Voltage. Delft University Press.
E. Kuffel, W. S. Zaengl and John Kuffel (2000). High Voltage Engineering - Fundamentals. Butterworth-Heinemann.
W. Hauschild, E. Lemke (2014). High-Voltage Test and Measuring Techniques. Springer.
F. Kremer, A. Schönhals (2003). Broadband Dielectric Spectroscopy. Springer.
Len A. Dissado, John C. Fothergill (1992). Electrical Degradation and Breakdown in Polymers. IET.
Dieter Kind and Hermann Kärner (1985). High-Voltage Insulation Technology. Springer.
T. Tanaka, A.S. Vaughan (editors) (2017). Tailoring of Nanocomposite Dielectrics. Pan Stanford.
Assessment
Summative
This is how we’ll formally assess what you have learned in this module.
| Method | Percentage contribution |
|---|---|
| Coursework | 50% |
| Coursework | 50% |
Referral
This is how we’ll assess you if you don’t meet the criteria to pass this module.
| Method | Percentage contribution |
|---|---|
| Coursework | 100% |
Repeat
An internal repeat is where you take all of your modules again, including any you passed. An external repeat is where you only re-take the modules you failed.
| Method | Percentage contribution |
|---|---|
| Coursework | 100% |
Repeat Information
Repeat type: Internal & External