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4. Synchronous generator DC test, open circuit test and short circuit test are done to a...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator are given in the tables shown. Calculate (a) the unsaturated synchronous reactance, (b) the saturated synchronous reactance. Open-circuit test Field current, A Line voltage, KV Extrapolated air gap voltage, KV Short-circuit test Field current, A Armature current, A 275 12.2 1 3.3 320 13.0 15.4 365 13.8 17.5 380 14.1 18. 3 475 | 15.2 22.8 570 16.0 27.4 275320365 890 1040 1190 380...
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the mac...
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the machine supplies 1200A at 0.8PF lagging. Under full-load conditions, the friction and windage losses are 40kW, and the core losses are 30kW. Ignore field 300 200 circuit losses. a) If the generator is operated at full load, how much field current is required to keep the terminal 100 voltage constant...
The following readings were taken during an open-circuit test and short-circuit test on a three-phase, 10...
The following readings were taken during an open-circuit test and short-circuit test on a three-phase, 10 MVA, 13.8 kV, 50 Hz synchronous generator driven at rated speed. Open Circuit Test Field Current 150 A 180 A 200 A 250 A 300 A 350 A Line voltage 11.2 kV 12.0 kV 12.5 kV 13.5 kV 14.3 kV 14.8 kV Short Circuit Test Field Current 150 A 180 A Short Circuit Current 400 A 480 A a) Plot the open-circuit and short-circuit...
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utili...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
Power generations 1. The output voltage of a synchronous generator is a function of the a....
Power generations
1. The output voltage of a synchronous generator is a function of the a. speed of rotation and polarity of the field current. b. speed of rotation and strength of the field electromagnet. c. speed of rotation and input torque. d. speed of rotation only 2. The equivalent circuit for one phase of a three-phase synchronous generatoir operating at constant speed and fixed field current is a. identical to that of a dc generator b. very similar to...
S. A three-phase, 4-pole, Y-connected synchronous generator is rated 575V, 200k VA, 60Hz. The generator's synchronous...
S. A three-phase, 4-pole, Y-connected synchronous generator is rated 575V, 200k VA, 60Hz. The generator's synchronous reactance is X-0.Q. Losses are negligible. The generator is comnected to an ideal 575V three- phase 60 Hz bus. Use V, for phase a-to-neutral as the reference angle (a) The generator's input power is 150kW. The generator's field current is adjusted to 10A which caases the generator to operate at unity power factor. What is the generator's phase-a armature current Ia (magnitude and phase)?...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a winding resistance of 0.3 Q and a synchronous reactance of 0.6 on a per phase basis. Determine its voltage regulation at full load when the power factor is (a) 75% lagging and (b) 75% leading. B) (10 marks) A 220-V, Y-connected, three-phase, synchronous motor has a synchronous reactance of 4 O/phase and negligible armature winding resistance. At a certain load the motor takes 7.5...
3. A 20kW, 250V, 1000rpm shunt excited dc motor has armature and field resistances of 0.2...
3. A 20kW, 250V, 1000rpm shunt excited dc motor has armature and field resistances of 0.2 ohm and 2002. When the motor takes 80A rated current at rated conditions. Draw the equivalent circuit and calculate induced torque at 1200rpm. Explain the starting current limiting methods for DC motors. (30 pts) 4. Explain the conditions for parallel operation of synchronous generators. A three phase, wye connected, synchronous generator is rated 150 MW, 0.85 lagging power factor, 12.6 kV, 60 Hz, and...
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...
Q3- A synchronous motor's parameters are 220-volt,50 hp, 4-pole, 60Hz, 0.8 pf lagging. The synchronous reactance...
Q3- A synchronous motor's parameters are 220-volt,50 hp, 4-pole, 60Hz, 0.8 pf lagging. The synchronous reactance is 2.4ohm.The armature resistance is negligible. The motor is Y-connected.The motor's friction & windage losses are 1400W and its core loss is 1000W.The motor is supplying power to a 25hp load connected to the shaft, at an initial pf of 0.80 lagging. Calculate: (a)the input power and the efficiency (b)the line and phase currents (c)the internal voltage Ea There has been a change in...
09C6 p.): The Open Circuit and the Short Circuit characteristics of a 14.1-KV 30-MVA synchronous generator are given in the tables shown. Calculate (a) the unsaturated synchronous reactance, (b) the saturated synchronous reactance. Open-circuit test Field current, A Line voltage, KV Extrapolated air gap voltage, KV Short-circuit test Field current, A Armature current, A 275 12.2 1 3.3 320 13.0 15.4 365 13.8 17.5 380 14.1 18. 3 475 | 15.2 22.8 570 16.0 27.4 275320365 890 1040 1190 380...
A 3-phase 480V, 4-pole, 60Hz, Delta- connected synchronous generator with the OCC shown here has an armature resistance of RA-0015Ω and 400 synchronous reactance ofX, 0.1.2. At full load, the machine supplies 1200A at 0.8PF lagging. Under full-load conditions, the friction and windage losses are 40kW, and the core losses are 30kW. Ignore field 300 200 circuit losses. a) If the generator is operated at full load, how much field current is required to keep the terminal 100 voltage constant...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
Power generations
1. The output voltage of a synchronous generator is a function of the a. speed of rotation and polarity of the field current. b. speed of rotation and strength of the field electromagnet. c. speed of rotation and input torque. d. speed of rotation only 2. The equivalent circuit for one phase of a three-phase synchronous generatoir operating at constant speed and fixed field current is a. identical to that of a dc generator b. very similar to...
S. A three-phase, 4-pole, Y-connected synchronous generator is rated 575V, 200k VA, 60Hz. The generator's synchronous reactance is X-0.Q. Losses are negligible. The generator is comnected to an ideal 575V three- phase 60 Hz bus. Use V, for phase a-to-neutral as the reference angle (a) The generator's input power is 150kW. The generator's field current is adjusted to 10A which caases the generator to operate at unity power factor. What is the generator's phase-a armature current Ia (magnitude and phase)?...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a winding resistance of 0.3 Q and a synchronous reactance of 0.6 on a per phase basis. Determine its voltage regulation at full load when the power factor is (a) 75% lagging and (b) 75% leading. B) (10 marks) A 220-V, Y-connected, three-phase, synchronous motor has a synchronous reactance of 4 O/phase and negligible armature winding resistance. At a certain load the motor takes 7.5...
3. A 20kW, 250V, 1000rpm shunt excited dc motor has armature and field resistances of 0.2 ohm and 2002. When the motor takes 80A rated current at rated conditions. Draw the equivalent circuit and calculate induced torque at 1200rpm. Explain the starting current limiting methods for DC motors. (30 pts) 4. Explain the conditions for parallel operation of synchronous generators. A three phase, wye connected, synchronous generator is rated 150 MW, 0.85 lagging power factor, 12.6 kV, 60 Hz, 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...
Q3- A synchronous motor's parameters are 220-volt,50 hp, 4-pole, 60Hz, 0.8 pf lagging. The synchronous reactance is 2.4ohm.The armature resistance is negligible. The motor is Y-connected.The motor's friction & windage losses are 1400W and its core loss is 1000W.The motor is supplying power to a 25hp load connected to the shaft, at an initial pf of 0.80 lagging. Calculate: (a)the input power and the efficiency (b)the line and phase currents (c)the internal voltage Ea There has been a change in...
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