Title :
Transformer design considerations for mitigating geomagnetic induced saturation
Author :
Viana, W.C. ; Micaleff, R.J. ; Young, S. ; Dawson, F.P. ; Dick, E.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
9/1/1999 12:00:00 AM
Abstract :
This paper shows that the placement of an auxiliary winding, used to compensate for GIC, significantly influences its rating and that of the associated DC power supply. This paper considers stresses in a banked step-up transformer under system fault conditions. Finite element simulations using the commercially available software package Magnet 5.2 are used to calculate the magnetic flux density distribution and the induced winding voltage per turn under the worst case condition of a short circuited high voltage winding. The variation in the induced voltage is greater if the winding is moved up from its optimal position and less if the auxiliary winding is moved towards the geometric centre of the transformer
Keywords :
compensation; eddy currents; finite element analysis; magnetic flux; power transformers; transformer windings; Magnet 5.2 software; auxiliary winding placement; banked step-up transformer; compensating winding; finite element simulations; geomagnetic induced currents; geomagnetic induced saturation; induced voltage; induced winding voltage per turn; magnetic flux density distribution; short circuited high voltage winding; stresses; system fault conditions; transformer design; worst case condition; Circuit faults; Circuit simulation; Finite element methods; Geomagnetism; Magnetic circuits; Magnetic flux; Magnetic flux density; Power supplies; Software packages; Stress;
Journal_Title :
Magnetics, IEEE Transactions on
