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Journal of Superconductivity and Novel Magnetism

, Volume 32, Issue 2, pp 151–158 | Cite as

HTS Transformer Windings Design Using Distributive Ratios for Minimization of Short Circuit Forces

  • Ahmad MoradnouriEmail author
  • Mehdi Vakilian
  • Arsalan Hekmati
  • Mehdi Fardmanesh
Original Research
  • 73 Downloads

Abstract

High-temperature superconducting (HTS) transformers have a promising feature in reduction of total weight, total size, and the losses of large-scale distribution transformers. However, the lower leakage reactance of HTS transformers results in a higher short-circuit fault currents and electromagnetic forces. Therefore, optimization of short-circuit electromagnetic forces is one of the crucial aspects in the design of HTS transformers. In this paper, a novel analytical method is proposed for determination of optimum distributive ratios resulting in minimization of these forces for asymmetrical multi-segment windings of an HTS transformer. Employing these distributive ratios, radial and axial components of short-circuit electromagnetic forces in an HTS transformer are significantly reduced. Two- and three-dimensional (2D and 3D) finite element method (FEM) simulations are employed to verify the analytical method results.

Keywords

High-temperature superconducting (HTS) transformers Leakage flux Multi-segment winding Optimum distributive ratios Short circuit force 2D and 3D finite element method 

Nomenclature

E

Electric field intensity [V/m]

J

Current density [A/mm2]

Jc

Critical current density [A/mm2]

Tc

Critical temperature [ok]

B

Magnetic flux density [T]

H

Magnetic field intensity [A/m]

F

Force density [N/m3]

δ

Width of duct between LV and HV in (LH) transformer windings [mm]

NLV

Number of turns in LV winding

NHV

Number of turns in HV winding

MMF

Magneto-motive force [A.Turns]

Isc

Short circuit current [A]

I0

Initial current [A]

R

Resistance [Ω]

L

Inductance [H]

X

Reactance [Ω]

Vm

Maximum voltage [V]

hw

Winding height [mm]

WLV

Width of LV winding in (LH) transformer windings [mm]

WHV

Width of HV winding in (LH) transformer windings [mm]

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Electrical Engineering DepartmentSharif University of TechnologyTehranIran
  2. 2.Department of Electrical and Computer EngineeringShahid Beheshti UniversityTehranIran

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