Abstract
The process of driving the magnetic core of saturated-cores fault-current-limiters (SCFCL) out of saturation has been studied numerically using finite elements calculations. The de-saturated core section was found to grow dynamically starting from the central region below the AC coils and gradually expanding towards the coil edges with increasing AC current amplitude. During the transition, the core volume underneath the coils is non-homogeneously magnetized and the system is highly non-linear. An effective core volume that contributes to the SFCL impedance during fault can be defined for different current amplitudes. Two "open core" SCFCL models have been studied and compared for their dynamic de-saturation process. The results demonstrate the importance of the dynamic effective volume size to the current limiting process and suggest that prior art approximations based on full core desaturation are not sufficient for a detailed SFCL design.
| Original language | English |
|---|---|
| Article number | 6142147 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 22 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2012 |
Bibliographical note
Funding Information:Manuscript received September 08, 2011; accepted December 06, 2011. Date of publication January 31, 2012; date of current version May 24, 2012. This work was supported in part by the Israeli Ministry of National Infrastructures. A. Friedman, Y. Nikulshin, Y. Wolfus, and Y. Yeshurun are with the Institute of Superconductivity, Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel (e-mail: [email protected]). V. Rozenshtein was with Bar-Ilan University, Ramat-Gan 52900, Israel. He is now with GridON Ltd., Givatayim 53853, Israel. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2011.2179837
Funding
Manuscript received September 08, 2011; accepted December 06, 2011. Date of publication January 31, 2012; date of current version May 24, 2012. This work was supported in part by the Israeli Ministry of National Infrastructures. A. Friedman, Y. Nikulshin, Y. Wolfus, and Y. Yeshurun are with the Institute of Superconductivity, Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel (e-mail: [email protected]). V. Rozenshtein was with Bar-Ilan University, Ramat-Gan 52900, Israel. He is now with GridON Ltd., Givatayim 53853, Israel. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2011.2179837
| Funders | Funder number |
|---|---|
| Ministry of National Infrastructure, Energy and Water Resources |
Keywords
- Coil impedance
- core saturation
- finite elements analysis
- saturated cores fault current limiter