By Topic

Five-legged wound-core transformer model: derivation, parameters, implementation and evaluation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Mork, B.A. ; Dept. of Electr. Eng., Michigan Technol. Univ., Houghton, MI, USA

The ability to predict or confirm ferroresonance and to evaluate its severity depends primarily on the correctness of the transformer model used in the computer simulation. An equivalent circuit is developed here for the widely used three-phase grounded-wye to grounded-wye five-legged wound-core distribution transformer. Recently developed equivalent circuits are generally correct, but cannot faithfully reproduce all of the ferroresonant modes possible in this transformer. This new equivalent circuit is derived using duality transformations. Core saturation and losses and coil capacitances are included in the model. Model parameters are obtained via measurement, obviating the need for proprietary manufacturer design information. The model is implemented in EMTP. Simulation results are presented and compared to measurements. A technique for predicting ferroresonance on a system level, based on the use of bifurcation diagrams and Poincare sections, is developed and implemented using EMTP. The model performs quite well, even though coil capacitances are not entirely included in the model. One of the key advancements is the development of a bifurcation simulation method to predict ferroresonant behaviors for a large range of capacitance values

Published in:

Power Delivery, IEEE Transactions on  (Volume:14 ,  Issue: 4 )