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Measurement of λ-i characteristics of asymmetric three-phase transformers and their applications

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2 Author(s)
Fuchs, E.F. ; Colorado Univ., Boulder, CO, USA ; Yiming You

Modeling of three-phase transformers with three-limb cores is important, such units are very ubiquitous and are asymmetric due to the different lengths of the three limbs of the core. It is, therefore, important to devise a measuring procedure, where the (λ-i) characteristics of the three limbs and the zero-sequence (λ0-i0) characteristic due to the tank can be determined. A simulation program is developed so that currents at no-load and symmetric or asymmetric loads can be computed. Measured currents are compared with computed results for 2.3-kVA and 45-kVA units.

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Power Delivery, IEEE Transactions on  (Volume:17 ,  Issue: 4 )