Subject Groups
Workshop on Dielectric Ageing
8 July 2007
The Guildhall, Winchester, UK
Dielectric materials constitute a critical element of devices ranging in size from supergrid transformers to field effect transistors and for these devices to function reliably for extended periods of time, it essential that the dielectric elements within them do not degrade. Consequently, the topic of ageing of dielectrics is of academic interest and of critical importance to many industrial sectors. This workshop sets out to examine this topic in a format that aims to promote discussion, with the aim of defining the current state of the art.
This workshop, which will be held at the Guildhall, Winchester on 8 July 2007, will precede ICSD2007. It follows on from a successful event held in Autrans, France, in June 2005.
Objectives
The objectives of the workshop are to answer two questions:
- What is our current state of knowledge concerning ageing processes in dielectrics?
- What needs to be done to advance this topic?
This will be achieved in three phases.
Phase 1 - In Advance of the Workshop
Workshop attendees will be invited to make a contribution in the form of a short statement with supporting evidence. These will be posted here nearer the event to enable all workshop participants to consider them in advance of the workshop and submit questions and comments that will, similarly, be posted here.
- Nanodielectics: How does the presence of interfaces influence behaviours? - Toshikatsu TANAKA
- Dialectic ageing: How can there be a local energy density sufficient to account for the damage? - Marshall STONEHAM
- Dialectic ageing: Does progressive ageing exist or is breakdown due to material factors and independent events causing damage over time? - G. C. MONTANARI
- Ideas for Multifactor Ageing - Prof. Len DISSADO and Prof. Gary STEVENS
- Outdoor HV polymeric insulation - progressive ageing or event driven ageing - Simon ROWLAND
- Composite Insulation Ageing: Main Focosed Phenomena and Analysis’ Limitations. One Look to the Future … - Elizabeth Da Silva
From the extended abstracts, a small number will be selected to be presented as 3-5 min short contributions.
Phase 2 - The Workshop Itself
The workshop programme is given below.
09:00 | Registration (Workshop + Workshop & ICSD) | ||
09:45 | Coffee |
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10:00 | Welcome and Introductory Remarks | Len Dissado | |
10:15 | Session 1 | Rapporteur | Len Dissado |
| Does progressive ageing exist or is breakdown due to material factors and independent events causing damage over time? | ||
| To be answered by: | Giancarlo Montanari |
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10:45 | Invited contributions: From those submitted to the webpage | ||
11:00 | Summary from Raporteur |
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11:15 | Coffee |
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11:30 | Session 2 | Rapporteur | Len Dissado |
| Nanodielectrics; how does the presence of interfaces influence behaviour? | ||
| To be answered by: | Toshikatsu Tanaka |
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12:00 | Invited contributions: From those submitted to the webpage | ||
12:15 | Summary from Raporteur |
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12:30 | Lunch | Buffet lunch for Workshop Attendees | |
14:00 | Session 3 | Rapporteur | Gary Stevens |
| If ageing does exist, what roles do electrical, thermal and mechanical fields play? | ||
| To be answered by: | Len Dissado |
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14:30 | Invited contributions: From those submitted to the webpage | ||
14:45 | Summary from Raporteur |
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15:00 | Tea |
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15:15 | Session 4 | Rapporteur | Gary Stevens |
| How can there be a local energy density sufficient to account for damage? | ||
| To be answered by: | Marshall Stoneham |
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15:45 | Invited contributions: From those submitted to the webpage | ||
16:00 | Summary from Raporteur |
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16:15 | Session 5 |
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| Formulation of agreed outcomes |
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| Chaired by: | Len Dissado and Gary Stevens | |
16:45 | Close |
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Each technical session begins with reviews of key aspects of the field, presented by leading researchers in the area, to provide some context for the rest of the session. This is followed by a sequence of short contributions, finally, discussion of the topics, led by the session rapporteur.
Phase 3 - Outcomes
We intend that the workshop should generate agreed statements of what constitutes the current state of knowledge, where disagreement exists, where and what further work is necessary, and how these issues may be addressed. This will be posted on the workshop web site, again courtesy of the Institute of Physics Dielectrics Group, and written up by the workshop organizers and rapporteurs for publication in IEEE Electrical Insulation Magazine. In this way, the workshop will have a tangible outcome, which will help drive future agenda to advance the field both scientifically and in terms of engineering practice.
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