A submarine has a 3-phase, Y-connected, 2- pole, 60Hz
synchronous generator rated to deliver 1687.5 kVA...
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz
synchronous generator rated to deliver 1687.5 kVA at a FP = 0.8
lagging with a line voltage of 450-V. The machine stator resistance
RS = 0.004 ?. The synchronous reactance is Xs=0.08 ?. The actual
system load on the machine draws 900 kW at FP = 0.6 lagging. Assume
that a voltage regulator has automatically adjusted the field
current so that the terminal voltage is its rated value. Mechanical
losses are...
A synchronous generator 480-V, 50-Hz, Y-connected, six-pole has
a power rating of 50 kVA at pf...
A synchronous generator 480-V, 50-Hz, Y-connected, six-pole has
a power rating of 50 kVA at pf 0.8 lagging. The synchronous
Reactance Generator is 1.0 Ω per-phase. This Generator is connected
to the 45 kW steam turbine. The friction loss and the core
generators are respectively 1.5 kW and 1.0 kW.
Question : Draw a Capability curves!
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ,
synchronous generator has a synchronous reactance...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ,
synchronous generator has a synchronous reactance of 30W and
negligible resistance. The generator is connected to an infinite
bus at 6.6 KV and 60 Hz.
a)Determine the excitation voltage (Ea) when the machine is
delivering rated power at o.8 PF lagging.
b)The field excitation current is increased by 10% without
changing the power input from the prime mover. Find the stator
current (Ia), the power factor and the reactive power...
A balanced positive-sequence, Y-connected generator has an
impedance of 0.3+j0.6 Ω/Φ, the terminal RMS voltage of...
A balanced positive-sequence, Y-connected generator has an
impedance of 0.3+j0.6 Ω/Φ, the terminal RMS voltage of the source
is 380V. The generator feeds a balanced, three-phase, Δ-connected
load having an impedance of 27 + j42 Ω/Φ. The impedance of the line
connecting the generator to the load is 0.6+j1.2 Ω/Φ.
1. Calculate the three line currents.
2. Calculate the line voltages at the terminals of the load.
3. Calculate the phase load currents.
4. Calculate the line voltage at the...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected
synchronous generator has a synchronous reactance,...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected
synchronous generator has a synchronous reactance, Xs = 17.9, and
is connected to an infinite bus at rated voltage. If the rotational
and electrical losses are negligivle, what is Ia, Ef, delta, theta,
Tdrive, Phasor diagram, and power flow diagram (label completely
with numerical values for,
A) the machine as a generator; the prime-throttle is opened and
If is adjusted so that the machine delivers rated kVA, 0.8 pf
lagging,...
The no-load (line) voltage of a 6-pole, 72-slot, 1200-rpm,
three-phase, Y-connected, synchronous generator is 1732 V....
The no-load (line) voltage of a 6-pole, 72-slot, 1200-rpm,
three-phase, Y-connected, synchronous generator is 1732 V. There
are 10 conductors per slot. For a series connection, determine (a)
the frequency of the induced emf and (b) the flux per pole.
3) A three-phase, nozzle, 4-pole cylindrical pole synchronous
generator feeds a 400 Volt, 50Hz conversion center....
3) A three-phase, nozzle, 4-pole cylindrical pole synchronous
generator feeds a 400 Volt, 50Hz conversion center. The synchronous
reactance of the synchronous generator is 0.72 Ove armature
resistance is neglected. The relation between the pole voltage E
'induced in the induction of the synchronous generator and the
excitation current, is selected as E, = 824. In this working
environment of the synchronous generator,
a.) On the consumer screen, find the excitation current (U),
load values, internal phase values, the moment...
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a
resistance of 0.401 /phase...
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a
resistance of 0.401 /phase and a synchronous reactance of 3.21
/phase. If the generator is supplying a load at a power factor of
0.8 lagging and at rated KVA, calculate the change in line voltage
at the output terminals of the generator if the load is suddenly
disconnected. Assume the speed and the excitation current is to
remain unchanged.
A two-pole Y-connected generator rated at 13.8 kV, 20 MVA, 0.8
p.f. leading is running at...
A two-pole Y-connected generator rated at 13.8 kV, 20 MVA, 0.8
p.f. leading is running at 1800 rpm. The generator has a
synchronous reac- tance of 8 Ω per phase (at 60 Hz) and a
negligible armature resistance per phase. The generator is operated
in parallel with an interconnected power network. Compute the
following:
(i) What is the torque angle of the generator at rated
conditions?
(ii) How many MW of power this generator can deliver?