recitatin3

# recitatin3 - 1 Electric Energy Processing Fundamentals and...

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Unformatted text preview: 1 Electric Energy Processing: Fundamentals and Applications 18-418: Recitation #3 Dr. Nermeen T. Mahmoud ( [email protected] ) September 9,2009 Power Transformer Model and Per-Unit 2 Single Transformer Single Transformer consists of two or more coils placed around on the core so that they are linked by the same magnetic flux. The coils are placed on an iron core in order to confide the flux so that almost all of flux linking any one coil links the others. 3 Ideal Single Transformer Assuming All of the flux is confined the core and therefore links all of the turns of both side Core losses and the winding resistance are zero. 4 v v v v 2 1 2 1 2 2 1 1 N N dt d N dt d N Where:- Φ the flux links both primary and secondary [Wb]. N 1 the number of turns of the primary winding. N 2 the number of turns of the secondary winding. V 1 the primary terminal voltage [V]. V 2 the secondary terminal voltage [V].. Ideal Single Transformer 5 2 2 1 2 1 1 2 2 1 2 2 1 1 2 1 2 1 2 1 Z Z I I V V V V phasor N N N N I I S S N N In [1] Ideal Single Transformer 6 Example (3-1) 1/5 A single-phase power system is shown in Figure 3-1. The power source feeds a 100-kVA 14/2.4-kV transformer through a feeder impedance of 38.2 + 100-kVA 14/2....
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## This note was uploaded on 09/20/2010 for the course ECE 18418 taught by Professor Illic during the Fall '09 term at Carnegie Mellon.

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recitatin3 - 1 Electric Energy Processing Fundamentals and...

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