Reference no: EM13844417
For a given AC motor: 3-Φ, 625 kVA, 480 V, 670 HP, nn = 886 rpm (n0 = 900 rpm), 91% Efficiency. Also, R1 = 0.01 Ω, X1 = 0.06 Ω, R2' = 0.017 Ω, X2' = 0.066 Ω, and Xm = 2.23 Ω. Assume Rm → ∞.
The motor operates as a generator driven by wind turbine.
Obtain:
1) The required diameter of the rotor blades of the wind turbine.
2) Calculate the required capacitor bank that allows a stand-alone operation of the induction generator.
3) If the no-load excitation curve is given by V0ph = 2915 (1-e-0.043/m, where Im is the magnetizing current of the machine, and V0ph is the no-load phase voltage, obtain the actual voltage at no-load operation of the generator (at rated magnetizing current).
4) The maximum power the induction generator can supply to the load.
Assume: the maximum (critical) torque of the induction generator equals the pushover torque of the wind turbine at a wind speed of 32 mph.
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