The resistances and leakage reactance’s of a 30-kVA, 60-Hz,1 answer below »

The resistances and leakage reactance’s of a 30-kVA, 60-Hz, 2400-V: 240-V distribution transformer are R1 = 0.68 ? R2 = 0.0068 ?, X11 = 7.8 ? X12 = 0.0780 ? where subscript 1 denotes the 2400-V winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer.
a. Draw the equivalent circuit referred to (i) the high- and (ii) the low-voltage sides. Label the impedances numerically. b. Consider the transformer to deliver its rated kVA to a load on the low-voltage side with 230 V across the load. (i) Find the high-side terminal voltage for a load power factor of 0.85 power factor lagging. (ii) Find the high-side terminal voltage for a load power factor of 0.85 power factor leading. c. Consider a rated-kVA load connected at the low-voltage terminals operating at 240V. Use MATLAB to plot the high-side terminal voltage as a function of the power-factor angle as the load power factor varies from 0.6 leading through unity power factor to 0.6 pf lagging.

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