A 3-phase, 10 MVA, 11 kV generator with a solidly earthed neutral point supplies a feeder. The relevant impedances of the generator and feeder in ohms are as under: Positive sequence impedance Negative sequence impedance Zero sequence impedance Generator j 1.2 j 0.9 j0.4 feeder j 1.0 j 1.0 j 3.0

Q: A 3-phase synchronous generator has no-load line-to-line terminal voltage of 1KV. When the output…

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Q: A three phase generator is operating at 1500rpm and has a no-load voltage of 7 kV. What would be the…

A: In this question, we need to choose the correct option.

Q: A 13.2 kV, 60 Hz, 3-phase synchronous generator is connected in star and its neutral point is…

A: Given, The supply voltage (E)= 13.2 kV(rms)  Frequency (f)= 50 Hz  Per phase inductance (L)= 0.02 H…

Q: Two single phase transformers A and B with equal turns ratio have reactance of j3.2 and j19.2…

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Q: In a three-phase system the per-unit phase voltages are Van = 0.9220° , Vin 0.9Z – 100° , Von…

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Q: 17 A3-phase generator rated 3000 KVA, 20 kV, 900 r/min, 60 Hz delivers power to a 2400 KVA, 16 kV…

A: In this question,  We need to determine the value of voltage per phase  if load of the system is…

Q: In figure below the rating of reactance and various components are shown. A load of 50MW at p.f.…

A: Let 100MVA and 11KV be the base in the generator circuit. accordingly the base in transmission line…

Q: O A. The reactive power is flowing from the generator to the load and from load to the generator at…

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Q: A synchronous generator is rated 645 MVA, 24 kV, 0.9 pf lagging. It has a synchronous reactance 1.2…

A: It is given that:Rating of the generator = 645 MVATerminal voltage = 24 kVcos = 0.9…

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.