The following data are obtained from tests on a 145-MVA, 13.8-kV, three phase, 6

Question

The following data are obtained from tests on a 145-MVA, 13.8-kV, three phase, 60-Hz, 72-pole hydroelectric generator.

Open-circuit characteristic:

Short-circuit test: If = 710 A, Ia = 6070 A
a. Plot using MATLAB the open-circuit saturation curve, the air-gap line, and the short-circuit characteristic.
b. Find AFNL and AFSC. (Note that if you use MATLAB for part (a), you can use the MATLAB function 'poly fit' to fit a second-order polynomial to the open-circuit saturation curve. You can then use this fit to find AFNL.)

Explanation / Answer

CODE:

Mainfunction:

Dataentry:

Line to line fault:

Double line to ground fault:

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