A 50 Hz synchronous generator is supplying 60% of its maximum power to an infinite bus through a reactive network. Due to a certain fault, the reactance of the network between the generator internal voltage and the infinite bus is increased four times. After the fault is cleared, 80% of maximum power can be transferred. Attya am 2020-21 Ayma tty

Q: 500MVA, 21KV, star connected, 3ph 50Hz synchronous generator is operating at the rated voltage, a…

A: Types of Short circuit Transient Sub Transient Period Transient Period Steady-state period

Q: G1 Bus 1 Bus 2 Line Bus 3 T2 Bus4 M1 j402 25 MVA Ye A 13.0 kV Xg1 =10% зо мVA 13.4/69 kV 20 MVA…

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Q: The subtransient reactance of a generator is typically much larger than the steady-state reactance.…

A: 1 ) generally the subtrasient  response of a generator is larger than the steady state reactance. So…

Q: What are the conditions for a group of synchronous generators to be connected to the same busbar…

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Q: Problem 2. A 69-kV transmission circuit supplies power from a large interconnected utility to a…

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Q: A star connected 3 phase wound field synchronous generator with a synchronous reactance of 20 Q is…

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Q: A 500 kVA, 6.6 kV star connected alternator has a synchronous reactance of 1.0 2 per phase and…

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Q: Question 4 In case of N-R method of power flow solution at the generator bus one column and one row…

A: 4) Newton- Raphson method of power flow solution at the generator bus

Q: A 300V, 60kW shunt generator has 1200 turns on each pole of its field wind ing. On load a current of…

A: It is given that: V=300 VP=60 KW=6000 W

Q: 7. Two 440V, 60Hz, 6 pole, 30 AC generators are running in parallel. The first supplies the busbars…

A: It refers to the connection of multiple generators in a way to supply a common load. This…

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.