![Problem 2. [20 PT] A 25 MVA, three phase, 13.8 KV, A-connected, two pole, 60 Hz synchronous generator was tested by open circ](http://img.homeworklib.com/questions/6c54d4e0-0f7a-11ec-9455-affb9f74c2be.png?x-oss-process=image/resize,w_560)
![b) [10 PT] Find the field current required if the generator is to deliver 3 MW at rated voltage and at 0.9 leading pf.](http://img.homeworklib.com/questions/6ce32030-0f7a-11ec-8a43-1f66ba5eb8cf.png?x-oss-process=image/resize,w_560)
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Problem 2. [20 PT] A 25 MVA, three phase, 13.8 KV, A-connected, two pole, 60 Hz...
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...
Q2) A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y-connected synchronous generat...
Q2) A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y-connected synchronous generator has a synchronous reactance of 2.5 Ω and an armature resistance of 0.2 Ω At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a de voltage of 120 V, and the maximum , is 10 A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC of this generator...
A 300-MVA, 13.8-KV, three-phase, 60-Hz, Y-connected synchronous generator is adjusted to produce rated voltage on open...
A 300-MVA, 13.8-KV, three-phase, 60-Hz, Y-connected synchronous generator is adjusted to produce rated voltage on open circuit. A bal- anced three-phase fault is applied to the terminals at t = 0. After analyz- ing the raw data, the symmetrical transient current is obtained as 1 S.S. trans. iae(t) = 10(i + e 1/200 + 6e-1/15). sin ( 1 (a) Sketch inc(t) as a function of time for 0 st s 500 ms. (b) Determine X]" and X, in per unit...
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...
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...
A 75 MVA, 25 Kv, three-phase, 60 Hz synchronous generator has a synchronous reactance of X=...
A 75 MVA, 25
Kv, three-phase, 60 Hz synchronous generator
has a synchronous reactance of X= 9
Ω per phase and a negligible resistance.
The generator is delivrimg rated power at a
0.8 power factor lagging at the rated
terminal voltage to an infinitie bus, as shown in the following
figure 1.
Figure 1.The synchronous generator connected to infinite bus
in single phase.
1) The excitation voltage is E = 26.87 KV,
The generator delivring 60 MW. Compute the powe...
A three-phase, delta-connected, two-pole, synchronous generator is connected to a 60 Hz, 13.5 kV (line-to-line), system....
A three-phase, delta-connected, two-pole, synchronous generator is connected to a 60 Hz, 13.5 kV (line-to-line), system. The generator is delivering its rated output power, under which conditions pfload = 0.8 lagging and |SI = 20 MVA. The generator per-phase model parameters at rated load are. RA = 0.5 2 Xss = 522 9. What is the generator's line-to-line voltage regulation? Is the voltage regulation positive or negative? 10. If the field current is held at the rated load value, but...
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connect...
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connected through a 200 MVA 20/138 KV Y-Y transformer to a 138 kV transmission line. The generator reactances to the machine's own base are X-1.10 Both of the transformers Y connections are solidly grounded and its positive, negative and zero sequence series resitances are all 0.10 pu. a. What is the voltage at the terminals of the generator during the sub transient period if a...
A three-phase synchronous generator with rated data VM = 20 kV, SM = 100 MVA, n...
A three-phase synchronous generator with rated data VM = 20 kV, SM = 100 MVA, n = 500 rpm is driven by a turbine that can provide a maximum of 1.6 MNm. Synchronous reactance, XS = 3Ω / phase. The armature resistance (Ra ) is neglected. In open circuit mode (P = 0), an excitation current of 300 A is required to obtain rated voltage (VM ). The machine should be phased into a strong grid, 3x20 kV, 50 Hz....
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.
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...
Q2) A 13.8-kV, 50-MVA, 0.9-power-factor-lagging, 60-Hz, four-pole Y-connected synchronous generator has a synchronous reactance of 2.5 Ω and an armature resistance of 0.2 Ω At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a de voltage of 120 V, and the maximum , is 10 A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC of this generator...
A 300-MVA, 13.8-KV, three-phase, 60-Hz, Y-connected synchronous generator is adjusted to produce rated voltage on open circuit. A bal- anced three-phase fault is applied to the terminals at t = 0. After analyz- ing the raw data, the symmetrical transient current is obtained as 1 S.S. trans. iae(t) = 10(i + e 1/200 + 6e-1/15). sin ( 1 (a) Sketch inc(t) as a function of time for 0 st s 500 ms. (b) Determine X]" and X, in per unit...
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...
A 75 MVA, 25
Kv, three-phase, 60 Hz synchronous generator
has a synchronous reactance of X= 9
Ω per phase and a negligible resistance.
The generator is delivrimg rated power at a
0.8 power factor lagging at the rated
terminal voltage to an infinitie bus, as shown in the following
figure 1.
Figure 1.The synchronous generator connected to infinite bus
in single phase.
1) The excitation voltage is E = 26.87 KV,
The generator delivring 60 MW. Compute the powe...
A three-phase, delta-connected, two-pole, synchronous generator is connected to a 60 Hz, 13.5 kV (line-to-line), system. The generator is delivering its rated output power, under which conditions pfload = 0.8 lagging and |SI = 20 MVA. The generator per-phase model parameters at rated load are. RA = 0.5 2 Xss = 522 9. What is the generator's line-to-line voltage regulation? Is the voltage regulation positive or negative? 10. If the field current is held at the rated load value, but...
3. A 200 MVA, 20 kV, 60 Hz Y-connected solidly grounded three phase synchronous generator connected through a 200 MVA 20/138 KV Y-Y transformer to a 138 kV transmission line. The generator reactances to the machine's own base are X-1.10 Both of the transformers Y connections are solidly grounded and its positive, negative and zero sequence series resitances are all 0.10 pu. a. What is the voltage at the terminals of the generator during the sub transient period if a...
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.
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