Homework Answers
Add Answer to:
A 36 MVA, 20.8 kV, 3-phase alternator has a synchronous reactance of 9 Q and a...
A 3-phase, 100 MVA, 11 kV, 60 Hz, 200 rpm synchronous generator has synchronous reactance of...
A 3-phase, 100 MVA, 11 kV, 60 Hz, 200 rpm synchronous generator has synchronous reactance of 12 2 and negligible stator resistance. a. The generator is connected to an infinite bus and delivers 80 MW at 0.8 leading power factor. Determine the power angle and excitation voltage EA. Draw the phasor diagram. b. The field current of the generator is now slowly reduced until the generator reaches its static stability limit (5=0). For this condition, determine the power angle, excitation...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and its internal (excitation) voltage is adjusted to 1.2 PU. The generator is connected to a 19 kV (line) infinite-bus. If the voltage angle (d) between the infinite-bus and the generator internal voltage is 20°, calculate, The generator active power output. The generator line current. Draw the phasor diagram for one phase.
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....
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...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV,...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV, 50 Hz. If the synchronous reactance is 5 per phase, calculate the generated voltage if the following are connected to its terminals: i. Resistive load is 12 MW (5 marks) ii. Inductive load is 12 MVAR (5 marks) iii. Capacitive load is 12 MVAR. (5 marks) f. How will the generated voltage be affected in each of the case (a), (b) & (c) above?...
QUESTION 5 A 3-phase, 22 kV (phase), 500 MVA star-connected synchronous generator has a per phase...
QUESTION 5 A 3-phase, 22 kV (phase), 500 MVA star-connected synchronous generator has a per phase reactance Xg of 1.5 pu and supplies 0.8 pu per phase real power (P) at the rated voltage, with a lagging power factor of 0.6 to the load. Find the actual excitation voltage Vo in kV (line value). 96.392
A 60-MVA, 69.3-kV, three-phase synchronous generator has a synchronous reactance of 15 Ω/phase and negligible armature...
A 60-MVA, 69.3-kV, three-phase synchronous generator has a synchronous reactance of 15 Ω/phase and negligible armature resistance. -a. The generator is delivering rated power at 0.8 power factor lagging at the rated terminal voltage to an infinite bus bar. Determine the magnitude of the generated emfper phase and the power angle δ. -b. If the generated emfis 36 kV per phase, what is the maximum three-phase power that the generator can deliver before losing its synchronism? Winter
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...
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current,...
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current, excitation voltage and load angle. [10] (ii) What is the maximum theoretical power at this excitation? Draw a phasor diagram (to scale) and from this estimate the phase current and power factor when operating at this point. 151
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator...
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses...
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses and has reactance of 1.65 pu. The generator is operated on an infinite bus of 15 kV voltage and delivers 100 MVA at 0.8 Power Factor, lagging. a)Determine the internal voltage (E_i), the power angle (5), and the line current of the machine. b)If the field current of the machine is reduced by 10%, while the mechanical power input to the machine is maintained...
A 3-phase, 100 MVA, 11 kV, 60 Hz, 200 rpm synchronous generator has synchronous reactance of 12 2 and negligible stator resistance. a. The generator is connected to an infinite bus and delivers 80 MW at 0.8 leading power factor. Determine the power angle and excitation voltage EA. Draw the phasor diagram. b. The field current of the generator is now slowly reduced until the generator reaches its static stability limit (5=0). For this condition, determine the power angle, excitation...
3. A 722-MVA, 19-kV steam turbine generator has a per-phase synchronous reactance of 1.3 PU, and its internal (excitation) voltage is adjusted to 1.2 PU. The generator is connected to a 19 kV (line) infinite-bus. If the voltage angle (d) between the infinite-bus and the generator internal voltage is 20°, calculate, The generator active power output. The generator line current. Draw the phasor diagram for one phase.
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...
e. A three phase generator turning at 1500 rpm has a terminal voltage of 15 kV, 50 Hz. If the synchronous reactance is 5 per phase, calculate the generated voltage if the following are connected to its terminals: i. Resistive load is 12 MW (5 marks) ii. Inductive load is 12 MVAR (5 marks) iii. Capacitive load is 12 MVAR. (5 marks) f. How will the generated voltage be affected in each of the case (a), (b) & (c) above?...
QUESTION 5 A 3-phase, 22 kV (phase), 500 MVA star-connected synchronous generator has a per phase reactance Xg of 1.5 pu and supplies 0.8 pu per phase real power (P) at the rated voltage, with a lagging power factor of 0.6 to the load. Find the actual excitation voltage Vo in kV (line value). 96.392
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator operating at 7MW and a 0.88 lagging power factor is connected to the Grid. The synchronous reactance is 1.5Ω (i) Calculate the phase current, excitation voltage and load angle. [10] (ii) What is the maximum theoretical power at this excitation? Draw a phasor diagram (to scale) and from this estimate the phase current and power factor when operating at this point. 151
Q2 (a) A star connected 6.6kV, 8MVA synchronous generator...
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses and has reactance of 1.65 pu. The generator is operated on an infinite bus of 15 kV voltage and delivers 100 MVA at 0.8 Power Factor, lagging. a)Determine the internal voltage (E_i), the power angle (5), and the line current of the machine. b)If the field current of the machine is reduced by 10%, while the mechanical power input to the machine is maintained...
Most questions answered within 3 hours.
-
Write the ionic equations for the first stage of salts
hydrolysis.
Anion, Cation?
Na2S
NiSO4
K2SO4...
asked 1 hour ago -
suppose there is a normally distributed population with a mean of
250 and a standard deviation...
asked 2 hours ago -
Question Three
Suppose you as project manager are using the Waterfall
development methodology on a large...
asked 3 hours ago -
Which statement is not true about welfare in Canada?
A.Benefits typically vary based on one's ability...
asked 3 hours ago -
Please help me with FLOWCHART and UML diagram for class,
thank you!
#include <iostream>
#include <fstream>...
asked 4 hours ago -
3. Describe the “logic circuit” of the Lac operon. Which
proteins are bound or not to...
asked 4 hours ago -
Ayesha’s adjusted gross income is $60,000 in 2019. She donated a
piece of artwork with a...
asked 4 hours ago -
For Dijkstra’s shortest path algorithm:
a. Give the Big-O time for Dijkstra’s shortest path algorithm
and...
asked 4 hours ago -
Phosphorus violates the 'octet rule' in biological molecules,
forming more covalent bonds than expected based on...
asked 4 hours ago -
A 1.3 eV electron has a 10-4 probability of tunneling
through a 2.4 eV potential barrier....
asked 5 hours ago -
What is the one ingredient that is common to being successful
with all stakeholders?
profit
trust...
asked 5 hours ago -
Write an assembly language 32 bit program that reads in lines of
text by a .txt...
asked 5 hours ago