Details
| Original language | English |
|---|---|
| Title of host publication | 2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1-4 |
| Number of pages | 4 |
| ISBN (electronic) | 9781509048779 |
| Publication status | Published - 29 Nov 2017 |
| Event | 19th IEEE International Conference on Dielectric Liquids, ICDL 2017 - Manchester, United Kingdom (UK) Duration: 25 Jun 2017 → 29 Jun 2017 |
Abstract
The main goal of this research was to determine the influence of temperature and pressure on the development of partial discharges (PD) in sealed power transformers. A test vessel was developed to reproduce the conditions in a compact power transformer, which is commonly used in wind turbines. The electrode assembly resembles the structure of the high voltage winding in such a transformer. As insulation liquids a synthetic ester and a silicone fluid are investigated together with an aramid paper. This combination is typically used and allows high operating temperatures, but many of these transformers failed in the field. Therefore it was investigated how the PD inception and extinction voltage change over the temperature in an open system and how they are influenced by a change of the pressure of the gas cushion at different temperatures in a closed system. Furthermore dissolved and undissolved gases were evaluated after a stress with partial discharges over 72 hours. The obtained results show that the PD inception and extinction voltages are strongly influenced by temperature, pressure and type of gas used for the gas cushion.
Keywords
- Compact power transformer, Gas cushion, Hermetic transformer, Partial discharge
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
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2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 1-4.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigation on the development of load dependent partial discharges in compact power transformers of wind turbines
AU - Kuhnke, M.
AU - Münster, T.
AU - Werle, P.
N1 - Publisher Copyright: © 2017 IEEE. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017/11/29
Y1 - 2017/11/29
N2 - The main goal of this research was to determine the influence of temperature and pressure on the development of partial discharges (PD) in sealed power transformers. A test vessel was developed to reproduce the conditions in a compact power transformer, which is commonly used in wind turbines. The electrode assembly resembles the structure of the high voltage winding in such a transformer. As insulation liquids a synthetic ester and a silicone fluid are investigated together with an aramid paper. This combination is typically used and allows high operating temperatures, but many of these transformers failed in the field. Therefore it was investigated how the PD inception and extinction voltage change over the temperature in an open system and how they are influenced by a change of the pressure of the gas cushion at different temperatures in a closed system. Furthermore dissolved and undissolved gases were evaluated after a stress with partial discharges over 72 hours. The obtained results show that the PD inception and extinction voltages are strongly influenced by temperature, pressure and type of gas used for the gas cushion.
AB - The main goal of this research was to determine the influence of temperature and pressure on the development of partial discharges (PD) in sealed power transformers. A test vessel was developed to reproduce the conditions in a compact power transformer, which is commonly used in wind turbines. The electrode assembly resembles the structure of the high voltage winding in such a transformer. As insulation liquids a synthetic ester and a silicone fluid are investigated together with an aramid paper. This combination is typically used and allows high operating temperatures, but many of these transformers failed in the field. Therefore it was investigated how the PD inception and extinction voltage change over the temperature in an open system and how they are influenced by a change of the pressure of the gas cushion at different temperatures in a closed system. Furthermore dissolved and undissolved gases were evaluated after a stress with partial discharges over 72 hours. The obtained results show that the PD inception and extinction voltages are strongly influenced by temperature, pressure and type of gas used for the gas cushion.
KW - Compact power transformer
KW - Gas cushion
KW - Hermetic transformer
KW - Partial discharge
UR - http://www.scopus.com/inward/record.url?scp=85043518252&partnerID=8YFLogxK
U2 - 10.1109/icdl.2017.8124625
DO - 10.1109/icdl.2017.8124625
M3 - Conference contribution
AN - SCOPUS:85043518252
SP - 1
EP - 4
BT - 2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 19th IEEE International Conference on Dielectric Liquids, ICDL 2017
Y2 - 25 June 2017 through 29 June 2017
ER -