Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 2018 23rd International Conference on Electrical Machines, ICEM 2018 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1074-1079 |
| Number of pages | 6 |
| ISBN (electronic) | 9781538624777 |
| Publication status | Published - 24 Oct 2018 |
| Event | 23rd International Conference on Electrical Machines, ICEM 2018 - Alexandroupoli, Greece Duration: 3 Sept 2018 → 6 Sept 2018 |
Abstract
This paper investigates the prediction of sub-conductor circulating currents in hydro generators. First, an analytical field calculation approach, based on Biot-Savart law and Schwarz-Christoffel mappings is presented. Different field effects of both the stator and rotor are investigated and discussed. The analytical method also covers the calculation of the impedance matrix for a Roebel bar including effects inside the stator core. Finally, sub-conductor circulating currents are calculated based on the field calculation and the impedance matrix. The analytically calculated field and sub-conductor currents are compared to FE simulation results of a generator. One of the Roebel bars is modelled in detail inside the core as well as in the end region, including twelve twisted sub-conductors.
Keywords
- Conformal mapping, Energy efficiency, Finite element analysis, Hydroelectric power generation
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
Sustainable Development Goals
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Proceedings: 2018 23rd International Conference on Electrical Machines, ICEM 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1074-1079 8506880.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Analytical and Numerical Calculation of Sub-Conductor Circulationg Currents in Roebel Bars of Hydro Generators
AU - Fricke, Torben
AU - Rehfeldt, Alexander
AU - Schwarz, Babette
AU - Bresemann, Eva
AU - Ponick, Bernd
N1 - Publisher Copyright: © 2018 IEEE. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/10/24
Y1 - 2018/10/24
N2 - This paper investigates the prediction of sub-conductor circulating currents in hydro generators. First, an analytical field calculation approach, based on Biot-Savart law and Schwarz-Christoffel mappings is presented. Different field effects of both the stator and rotor are investigated and discussed. The analytical method also covers the calculation of the impedance matrix for a Roebel bar including effects inside the stator core. Finally, sub-conductor circulating currents are calculated based on the field calculation and the impedance matrix. The analytically calculated field and sub-conductor currents are compared to FE simulation results of a generator. One of the Roebel bars is modelled in detail inside the core as well as in the end region, including twelve twisted sub-conductors.
AB - This paper investigates the prediction of sub-conductor circulating currents in hydro generators. First, an analytical field calculation approach, based on Biot-Savart law and Schwarz-Christoffel mappings is presented. Different field effects of both the stator and rotor are investigated and discussed. The analytical method also covers the calculation of the impedance matrix for a Roebel bar including effects inside the stator core. Finally, sub-conductor circulating currents are calculated based on the field calculation and the impedance matrix. The analytically calculated field and sub-conductor currents are compared to FE simulation results of a generator. One of the Roebel bars is modelled in detail inside the core as well as in the end region, including twelve twisted sub-conductors.
KW - Conformal mapping
KW - Energy efficiency
KW - Finite element analysis
KW - Hydroelectric power generation
UR - http://www.scopus.com/inward/record.url?scp=85057167676&partnerID=8YFLogxK
U2 - 10.1109/icelmach.2018.8506880
DO - 10.1109/icelmach.2018.8506880
M3 - Conference contribution
AN - SCOPUS:85057167676
SP - 1074
EP - 1079
BT - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 23rd International Conference on Electrical Machines, ICEM 2018
Y2 - 3 September 2018 through 6 September 2018
ER -