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Power generations
1. The output voltage of a synchronous generator is a function of the a....
infinite bus through a step-up transformer Consider a synchronous generator connected to an Given the single phase equi...
infinite bus through a step-up transformer Consider a synchronous generator connected to an Given the single phase equivalent circuit information EZS= generator phase to neutral EMF VZ0 infinite bus phase to neutral voltage referred to the generator side of the step-up transformer generator synchronous reactance Zg jX, jX, transformer impedance referred to the generator side of the transformer Z, a) Sketch the capability diagram of a synchronous generator. Label all boundaries and explain their significance. Show clearly the safe operation...
A 10MVA 13.8-kV 60-Hz four-pole Y-connected synchronous generator is delivering rated power at unity power factor....
A 10MVA 13.8-kV 60-Hz four-pole Y-connected synchronous generator is delivering rated power at unity power factor. a) Draw the equivalent circuit for the analysis of this problem b) Find the synchronous reactance given that the field excitation voltage is 6.89kV (per phase) and leads the terminal voltage by an angle π/4. c) In a special occasion, the generator is operated as a motor (the synchronous reactance is the one derived in (a)). At rated terminal voltage, what is the minimum...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A....
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A. The open-circuit voltage was found to be 10 kV and the short-circuit current was 7.5 kA. The stator resistance was measured at 0.1 ohms per phase. i) Find the value of the synchronous reactance in per-unit. [ 2 marks ] ii) The synchronous generator is delivering half rated output at a terminal voltage of 5% below rated voltage and a power factor of 0.7...
Please show all the clearly step A 500 MVA, 24 kV, 60 Hz three-phase synchronous generator...
Please show all the clearly step
A 500 MVA, 24 kV, 60 Hz three-phase synchronous generator is operating at rated voltage and frequency with a terminal power factor of 0.8 lagging. The synchronous reactance X 0.8. Stator coil resistance is negligible. The internally generated voltage E,-18 kv a) Draw the per phase equivalent circuit. b) Determine the torque (power) angle 5, c) the total output power, d) the line current.
Assignment 4 An 11 kV, 50-Hz, Y-connected synchronous generator has a synchronous reactance of Xs-0.5Ω and...
Assignment 4 An 11 kV, 50-Hz, Y-connected synchronous generator has a synchronous reactance of Xs-0.5Ω and armature resistance, Ra-005Ω. The terminal voltage in all working conditions is assumed constant and equal to the rated voltage. The generator is delivering a load current of 2000A at 0.8 PF leading a. Draw the per-phase equivalent circuit of the generator. b. Calculate the induced EMF, EA. c. Calculate the real and reactive power delivered at the generator terminals. d. Sketch the phasor diagram...
A 100MVA synchronous generator is connected to a 25kV infinite bus through two parallel transmission lines....
A 100MVA synchronous generator is connected to a 25kV infinite bus through two parallel transmission lines. The synchronous reactance of the generator is 2.5Ω. Each transmission line has inductive reactance of 2Ω and 0.2Ω resistance. The generator delivers 90MVA to the infinite bus at 0.8 power factor lagging. For the above conditions, calculate: a. The terminal voltage of the generator b. The equivalent field voltage and power angle c. The real power output at the generator terminals d. The reactive...
A 200 - kVA, 480 V, 50 Hz, Y connected synchronous generator with a rated field...
A 200 - kVA, 480 V, 50 Hz, Y connected synchronous
generator with a rated field current of 5 A was tested. The
following data were taken
VT,oc at rated IF was measured to be 500 V
IL,sc at the rated IF was found to be 250 A
When a rated DC voltage of 20 V was applied to 2 of
the terminals, a current of 45 A was measured.
Draw the per phase equivalent circuit of the generator
at...
a. The figure below is a set of Synchronous Generator and Synchronous Motor. The ratings of...
a. The figure below is a set of Synchronous Generator and Synchronous Motor. The ratings of the machines are as follows: Synchronous Generator:. 3ph, 1.0MVA, 2.3kV, 50Hz, 0.85 lagging power factor, X.=0.9 pu Synchronous Motor: 3ph, 0.5 MVA, 2.36V, 50Hz, 0.85 leading power factor, X.=0.8 pu Synchronous generator Synchronous motor The generator is equipped with a voltage regulator which maintains the terminal voltage at the rated value. The motor delivers 500 hp and it field current is adjusted to make...
b) An 80MVA, 11kV synchronous generator with a sub transient reactance j0.125pu is connected to each...
b) An 80MVA, 11kV synchronous generator with a sub transient reactance j0.125pu is connected to each of three busbars labelled A, B and C in Figure 2. Three equal current limiting reactors (100MVA, 11kV) feeders. The main busbars supply secondary busbars (E, F and G) through a line of reactance j2.7 and 100MVA, 11kV/33kV j0.06pu transformers at both ends connected in series with the are Busbar D is connected at the 33kV side of the transformer at G to facilitate...
infinite bus through a step-up transformer Consider a synchronous generator connected to an Given the single phase equivalent circuit information EZS= generator phase to neutral EMF VZ0 infinite bus phase to neutral voltage referred to the generator side of the step-up transformer generator synchronous reactance Zg jX, jX, transformer impedance referred to the generator side of the transformer Z, a) Sketch the capability diagram of a synchronous generator. Label all boundaries and explain their significance. Show clearly the safe operation...
A 10MVA 13.8-kV 60-Hz four-pole Y-connected synchronous generator is delivering rated power at unity power factor. a) Draw the equivalent circuit for the analysis of this problem b) Find the synchronous reactance given that the field excitation voltage is 6.89kV (per phase) and leads the terminal voltage by an angle π/4. c) In a special occasion, the generator is operated as a motor (the synchronous reactance is the one derived in (a)). At rated terminal voltage, what is the minimum...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
Please show all the clearly step
A 500 MVA, 24 kV, 60 Hz three-phase synchronous generator is operating at rated voltage and frequency with a terminal power factor of 0.8 lagging. The synchronous reactance X 0.8. Stator coil resistance is negligible. The internally generated voltage E,-18 kv a) Draw the per phase equivalent circuit. b) Determine the torque (power) angle 5, c) the total output power, d) the line current.
Assignment 4 An 11 kV, 50-Hz, Y-connected synchronous generator has a synchronous reactance of Xs-0.5Ω and armature resistance, Ra-005Ω. The terminal voltage in all working conditions is assumed constant and equal to the rated voltage. The generator is delivering a load current of 2000A at 0.8 PF leading a. Draw the per-phase equivalent circuit of the generator. b. Calculate the induced EMF, EA. c. Calculate the real and reactive power delivered at the generator terminals. d. Sketch the phasor diagram...
A 200 - kVA, 480 V, 50 Hz, Y connected synchronous
generator with a rated field current of 5 A was tested. The
following data were taken
VT,oc at rated IF was measured to be 500 V
IL,sc at the rated IF was found to be 250 A
When a rated DC voltage of 20 V was applied to 2 of
the terminals, a current of 45 A was measured.
Draw the per phase equivalent circuit of the generator
at...
a. The figure below is a set of Synchronous Generator and Synchronous Motor. The ratings of the machines are as follows: Synchronous Generator:. 3ph, 1.0MVA, 2.3kV, 50Hz, 0.85 lagging power factor, X.=0.9 pu Synchronous Motor: 3ph, 0.5 MVA, 2.36V, 50Hz, 0.85 leading power factor, X.=0.8 pu Synchronous generator Synchronous motor The generator is equipped with a voltage regulator which maintains the terminal voltage at the rated value. The motor delivers 500 hp and it field current is adjusted to make...
b) An 80MVA, 11kV synchronous generator with a sub transient reactance j0.125pu is connected to each of three busbars labelled A, B and C in Figure 2. Three equal current limiting reactors (100MVA, 11kV) feeders. The main busbars supply secondary busbars (E, F and G) through a line of reactance j2.7 and 100MVA, 11kV/33kV j0.06pu transformers at both ends connected in series with the are Busbar D is connected at the 33kV side of the transformer at G to facilitate...
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