Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 2023 4th International Conference on High Voltage Engineering and Power Systems |
| Subtitle of host publication | ICHVEPS |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 293-298 |
| Number of pages | 6 |
| ISBN (electronic) | 9798350318678 |
| ISBN (print) | 979-8-3503-1868-5 |
| Publication status | Published - 2023 |
| Event | 4th International Conference on High Voltage Engineering and Power Systems, ICHVEPS 2023 - Denpasar Bali, Indonesia Duration: 6 Aug 2023 → 10 Aug 2023 |
Abstract
Dry type transformers can be manufactured by means of vacuum cast coil technology (VCC) or filament winding process (FW). Coils fabricated by means of the filament winding technology, in which reinforcing mineral fiber filaments are impregnated with an organic resin, have a high mechanical robustness. Also, due to the fact of the high amount of reinforcing material, the coils can withstand higher mechanical stresses, having a minor amount of flammable material. In this contribution, the influence of different manufacturing process parameters on the dielectric behavior of a composite insulation material for dry-type transformers produced under the filament winding technology is investigated. The experimental results of measurements over the frequency f of the relative permittivity r, the dissipation factor δ and the electrical conductivity κ of a composite insulation material, consisting of glass fiber filaments impregnated with epoxy resin, are presented. Six different production parameter variations were investigated. The measurements are performed in a frequency range between 10 Hz and 100 Hz considering the relevant operative values. Since the dielectric properties are strongly dependent on temperature, the measurements were performed at five different temperatures in a range between 50 °C and 120 °C. In general, the investigation shows an improvement in the dielectric parameters when the resin is vacuumed before the casting process. In that case, the dissipation factor δ is reduced in around 20 % compared with the case in which the samples were manufactured without additional process. Also, the dependency on the temperature of the δ is reduced. The application of vacuum during the curing process, as in the VCC technology, results contrarily in an impoverishment of the dielectric properties, leading to increasement of the dissipation factor near to the double of the base value and to high standard deviations on the measurements.
Keywords
- dielectric parameters, dissipation factor, dry type transformer, filament winding
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Safety, Risk, Reliability and Quality
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Proceedings of 2023 4th International Conference on High Voltage Engineering and Power Systems: ICHVEPS . Institute of Electrical and Electronics Engineers Inc., 2023. p. 293-298.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Influence of the Manufacture Process Parameters on the Dielectric Properties of a Composite Material for the Use in Dry Type Transformers
AU - Torres, Javier
AU - Stahl, Laureen
AU - Werle, Peter
PY - 2023
Y1 - 2023
N2 - Dry type transformers can be manufactured by means of vacuum cast coil technology (VCC) or filament winding process (FW). Coils fabricated by means of the filament winding technology, in which reinforcing mineral fiber filaments are impregnated with an organic resin, have a high mechanical robustness. Also, due to the fact of the high amount of reinforcing material, the coils can withstand higher mechanical stresses, having a minor amount of flammable material. In this contribution, the influence of different manufacturing process parameters on the dielectric behavior of a composite insulation material for dry-type transformers produced under the filament winding technology is investigated. The experimental results of measurements over the frequency f of the relative permittivity r, the dissipation factor δ and the electrical conductivity κ of a composite insulation material, consisting of glass fiber filaments impregnated with epoxy resin, are presented. Six different production parameter variations were investigated. The measurements are performed in a frequency range between 10 Hz and 100 Hz considering the relevant operative values. Since the dielectric properties are strongly dependent on temperature, the measurements were performed at five different temperatures in a range between 50 °C and 120 °C. In general, the investigation shows an improvement in the dielectric parameters when the resin is vacuumed before the casting process. In that case, the dissipation factor δ is reduced in around 20 % compared with the case in which the samples were manufactured without additional process. Also, the dependency on the temperature of the δ is reduced. The application of vacuum during the curing process, as in the VCC technology, results contrarily in an impoverishment of the dielectric properties, leading to increasement of the dissipation factor near to the double of the base value and to high standard deviations on the measurements.
AB - Dry type transformers can be manufactured by means of vacuum cast coil technology (VCC) or filament winding process (FW). Coils fabricated by means of the filament winding technology, in which reinforcing mineral fiber filaments are impregnated with an organic resin, have a high mechanical robustness. Also, due to the fact of the high amount of reinforcing material, the coils can withstand higher mechanical stresses, having a minor amount of flammable material. In this contribution, the influence of different manufacturing process parameters on the dielectric behavior of a composite insulation material for dry-type transformers produced under the filament winding technology is investigated. The experimental results of measurements over the frequency f of the relative permittivity r, the dissipation factor δ and the electrical conductivity κ of a composite insulation material, consisting of glass fiber filaments impregnated with epoxy resin, are presented. Six different production parameter variations were investigated. The measurements are performed in a frequency range between 10 Hz and 100 Hz considering the relevant operative values. Since the dielectric properties are strongly dependent on temperature, the measurements were performed at five different temperatures in a range between 50 °C and 120 °C. In general, the investigation shows an improvement in the dielectric parameters when the resin is vacuumed before the casting process. In that case, the dissipation factor δ is reduced in around 20 % compared with the case in which the samples were manufactured without additional process. Also, the dependency on the temperature of the δ is reduced. The application of vacuum during the curing process, as in the VCC technology, results contrarily in an impoverishment of the dielectric properties, leading to increasement of the dissipation factor near to the double of the base value and to high standard deviations on the measurements.
KW - dielectric parameters
KW - dissipation factor
KW - dry type transformer
KW - filament winding
UR - http://www.scopus.com/inward/record.url?scp=85174633941&partnerID=8YFLogxK
U2 - 10.1109/ICHVEPS58902.2023.10257568
DO - 10.1109/ICHVEPS58902.2023.10257568
M3 - Conference contribution
AN - SCOPUS:85174633941
SN - 979-8-3503-1868-5
SP - 293
EP - 298
BT - Proceedings of 2023 4th International Conference on High Voltage Engineering and Power Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th International Conference on High Voltage Engineering and Power Systems, ICHVEPS 2023
Y2 - 6 August 2023 through 10 August 2023
ER -