Question 1 Salient Pole Synchronous Machine (50 Marks] A three-phase, 100 MVA, 12 kV, 60 Hz, star-connected salient pole

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Question 1 Salient Pole Synchronous Machine 50 Marks A Three Phase 100 Mva 12 Kv 60 Hz Star Connected Salient Pole 1 (71.16 KiB) Viewed 34 times

Question 1 Salient Pole Synchronous Machine (50 Marks] A three-phase, 100 MVA, 12 kV, 60 Hz, star-connected salient pole synchronous machine has a direct-axis reactance of 1.0 pu. and a quadrature-axis synchronous reactance of 0.7 pu. The machine is connected to an infinite bus and delivers 72 MW at 0.9 lagging power factor. Determine the actual values of the d- and q-axis synchronous reactances. (a) Determine the excitation voltage E, and draw the phasor diagram using actual values assuming that the machine has a cylindrical rotor, where the synchronous reactance Xs = Xd. (b) Determine the excitation voltage E, and draw the phasor diagram using actual values assuming that the machine has a salient pole rotor. (c) Determine the excitation voltage E, and draw the phasor diagram using actual values assuming that the machine has a salient pole rotor and a stator resistance of 0.1 pu. (d) Determine the percentage error in the magnitude of the excitation voltage for the salient pole synchronous generator by assuming a cylindrical rotor while neglecting the stator resistance. (e) Determine the percentage error in the magnitude of the excitation voltage for the salient pole synchronous generator by neglecting the stator resistance. FRANCE SPAIN CO AL