# Gen_Calc_p1 - b Determine its per unit 2x2 admittance...

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SYNCH Homework - Problem 1 Date Due: Friday Oct 1, 5pm 1) [20 pts] A 50-MVA delta-wye transformer is rated 115-13.8-kV. It has standard phase shift of 30° (115-kV side leads 13.8-kV side by 30°). Its self-cooled short-circuit impedance is 0.005 + j0.045 p.u. on the base of the transformer. a) Convert the impedance to 100 MVA base for system calculations.

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Unformatted text preview: b) Determine its per unit 2x2 admittance matrix values for i) pos and ii) neg sequence, being sure to include the effect of phase shift. c) Repeat b) for the situation where the transformer is to connect system buses having base voltages of 115 kV and 12.47-kV. Include phase shift and off-nominal turns ratio....
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Gen_Calc_p1 - b Determine its per unit 2x2 admittance...

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