Details
| Original language | English |
|---|---|
| Title of host publication | 2021 29th Iranian Conference on Electrical Engineering, ICEE 2021 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 279-283 |
| Number of pages | 5 |
| ISBN (electronic) | 9781665433655 |
| Publication status | Published - 18 May 2021 |
| Event | 29th Iranian Conference on Electrical Engineering, ICEE 2021 - Tehran, Iran, Islamic Republic of Duration: 18 May 2021 → 20 May 2021 |
Publication series
| Name | 2021 29th Iranian Conference on Electrical Engineering, ICEE 2021 |
|---|
Abstract
The insulation system of converter transformers is more stressed electrically than of AC transformers while both types use the same insulation materials. However, the structure of insulation around valve winding in converter transformers is designed for withstanding AC and DC electric fields. In the DC field, electrical conductivity is the most important factor influencing the electric field distribution. Moreover, the electric conductivity is strongly dependent on the temperature and electric field. In this article, the dielectric parameters (DC conductivity and relative permittivity) were used in the COMSOL model to investigate the variation of electric field distribution at different temperatures and AC, DC and hybrid fields. The electrical conductivity of oil and pressboard was defined constant for simplicity. The results showed the great effect of temperature and DC voltage percentage on the electric field strength of pressboards used in the converter transformers.
Keywords
- Conductivity, Converter transformer, Electric field, FEM, HVDC, Oil, Pressboard, Temperature, Valve winding
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Instrumentation
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2021 29th Iranian Conference on Electrical Engineering, ICEE 2021. Institute of Electrical and Electronics Engineers Inc., 2021. p. 279-283 (2021 29th Iranian Conference on Electrical Engineering, ICEE 2021).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigation of electric stresses caused by applying DC and AC voltages on the insulation of converter transformers
AU - Sharifi, Aref
AU - Akbari, Asghar
AU - Werle, Peter
AU - Rasti, Keyvan
PY - 2021/5/18
Y1 - 2021/5/18
N2 - The insulation system of converter transformers is more stressed electrically than of AC transformers while both types use the same insulation materials. However, the structure of insulation around valve winding in converter transformers is designed for withstanding AC and DC electric fields. In the DC field, electrical conductivity is the most important factor influencing the electric field distribution. Moreover, the electric conductivity is strongly dependent on the temperature and electric field. In this article, the dielectric parameters (DC conductivity and relative permittivity) were used in the COMSOL model to investigate the variation of electric field distribution at different temperatures and AC, DC and hybrid fields. The electrical conductivity of oil and pressboard was defined constant for simplicity. The results showed the great effect of temperature and DC voltage percentage on the electric field strength of pressboards used in the converter transformers.
AB - The insulation system of converter transformers is more stressed electrically than of AC transformers while both types use the same insulation materials. However, the structure of insulation around valve winding in converter transformers is designed for withstanding AC and DC electric fields. In the DC field, electrical conductivity is the most important factor influencing the electric field distribution. Moreover, the electric conductivity is strongly dependent on the temperature and electric field. In this article, the dielectric parameters (DC conductivity and relative permittivity) were used in the COMSOL model to investigate the variation of electric field distribution at different temperatures and AC, DC and hybrid fields. The electrical conductivity of oil and pressboard was defined constant for simplicity. The results showed the great effect of temperature and DC voltage percentage on the electric field strength of pressboards used in the converter transformers.
KW - Conductivity
KW - Converter transformer
KW - Electric field
KW - FEM
KW - HVDC
KW - Oil
KW - Pressboard
KW - Temperature
KW - Valve winding
UR - http://www.scopus.com/inward/record.url?scp=85117460228&partnerID=8YFLogxK
U2 - 10.1109/ICEE52715.2021.9544148
DO - 10.1109/ICEE52715.2021.9544148
M3 - Conference contribution
AN - SCOPUS:85117460228
T3 - 2021 29th Iranian Conference on Electrical Engineering, ICEE 2021
SP - 279
EP - 283
BT - 2021 29th Iranian Conference on Electrical Engineering, ICEE 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 29th Iranian Conference on Electrical Engineering, ICEE 2021
Y2 - 18 May 2021 through 20 May 2021
ER -