Homework Answers
Answer:
The following current values for part a, b& c are given in
attachment of pages 3
Add Answer to:
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and...
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown in Figure P1. Parameters of both generator and transformer are given in the figure. Transformer losses and exciting current are neglected. A three-phase short-circuit occurs on the line side of the circuit breaker when the generator is operated at rated terminal voltage and at no-load. The breaker interrupts the fault three cycles after fault inception. Neglect the effect of the transformer on the time...
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...
Problem 2. [20 PT] A 25 MVA, three phase, 13.8 KV, A-connected, two pole, 60 Hz...
Problem 2. [20 PT] A 25 MVA, three phase, 13.8 KV, A-connected, two pole, 60 Hz synchronous generator was tested by open circuit and short circuit tests and following data was collected. Neglect the stator resistance for this question: Open Circuit Characteristics Line Voltage, KV 13.0 13.8 15.2 16.0 Field Current, A 320 365 380 475 570 14.1 Short Circuit Characteristics Field Current, A 320 Armature Current, A 1046 365 380 475 570 1190 1240 1550 1885 Compute a) [10...
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...
3.1 When two four pole, 50 Hz synchronous generators are paralleled their phase displacement is 2...
3.1 When two four pole, 50 Hz synchronous generators are paralleled their phase displacement is 2 mechanical. The synchronous reactance of each machine is 10 n/phase and the common busbar voltage is 66kV. Calculs the s cho nisimlengud AN 2 A synchronous generator has a synchronous impedance of 2p and a resist ance of 0.01 p.u. It is connected to an infinite busbar of voltage 1 pu. through a transformer of reactance 01 pou. If the generated (no-load) emfis 1.1...
QUESTION 4 A three-phase Y-connected, 500 kVA, 3.2 kV, 0.85 PF-lagging, six-pole, 60 Hz synchronous generator...
QUESTION 4 A three-phase Y-connected, 500 kVA, 3.2 kV, 0.85 PF-lagging, six-pole, 60 Hz synchronous generator has a synchronous reactance of 15 ohm and an armature resistance of 0.8 ohm. What are the electrical losses in this generator at the rated conditions? Attach File Browse My Computer Browse Content Collection QUESTION 5 If phase current of a Delta-connected three-phase system is equal to 1pu, then the line current of the same system is equal to 3 pu. Click Save and...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance Xn 0.05 per unit on the motor base. Assume that Pre-fault voltage is takin as VF-1.0 ,0° per unit and Pre- fault load current and Δ-Y transformer phase shift are neglected In the...
Search Results for: A 100 kVA, 1100 V, three-phase, 6-pole, Y-connected, 50 Hz synchronous machine has synchronous reactance of 6 $2 per-phase and negligible armature resistance. Its core losses are 7 kW and its friction and windage losses are 8 kW. The s
A 100 k VA, 1100 V, three-phase, 6-pole, Y-connected, 50 Hz synchronous machine has synchronousreactance of 6 92 per-phase and negligible armature resistance. Its core losses are 7 k W and itsfriction and windage losses are 8 kW. The speed droop is 2.5%.Initially the machine is operated alone as a generator and the field current is adjusted such that theno-load voltage equals the rated voltage.a) If the generator is supplying a line current of $2.5 A at 0.85 PF lagging....
1. A three-phase 50 Hz. generator is driven at constant speed. its per unit reactances and time constants are below: X": = 0,15 pu t": = 0,03 sec X'= 0,25 pu tt = 1,2 sec Xo = 1.10 pu Ta = 0,4 sec The generator windings are initially open-circuited and field voltage is adjusted to the rated value of generator terminal voltage. The generator is subjected to a symmetrical three-phase short circuit at the when ot/2. Obtain the asymmetrical waveform...
1. A three-phase synchronous generator connected to a 345-KV transmission line through a transformer as shown in Figure P1. Parameters of both generator and transformer are given in the figure. Transformer losses and exciting current are neglected. A three-phase short-circuit occurs on the line side of the circuit breaker when the generator is operated at rated terminal voltage and at no-load. The breaker interrupts the fault three cycles after fault inception. Neglect the effect of the transformer on the time...
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...
Problem 2. [20 PT] A 25 MVA, three phase, 13.8 KV, A-connected, two pole, 60 Hz synchronous generator was tested by open circuit and short circuit tests and following data was collected. Neglect the stator resistance for this question: Open Circuit Characteristics Line Voltage, KV 13.0 13.8 15.2 16.0 Field Current, A 320 365 380 475 570 14.1 Short Circuit Characteristics Field Current, A 320 Armature Current, A 1046 365 380 475 570 1190 1240 1550 1885 Compute a) [10...
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...
3.1 When two four pole, 50 Hz synchronous generators are paralleled their phase displacement is 2 mechanical. The synchronous reactance of each machine is 10 n/phase and the common busbar voltage is 66kV. Calculs the s cho nisimlengud AN 2 A synchronous generator has a synchronous impedance of 2p and a resist ance of 0.01 p.u. It is connected to an infinite busbar of voltage 1 pu. through a transformer of reactance 01 pou. If the generated (no-load) emfis 1.1...
QUESTION 4 A three-phase Y-connected, 500 kVA, 3.2 kV, 0.85 PF-lagging, six-pole, 60 Hz synchronous generator has a synchronous reactance of 15 ohm and an armature resistance of 0.8 ohm. What are the electrical losses in this generator at the rated conditions? Attach File Browse My Computer Browse Content Collection QUESTION 5 If phase current of a Delta-connected three-phase system is equal to 1pu, then the line current of the same system is equal to 3 pu. Click Save and...
A single line diagram of a power system is shown in Fig. 2. The system data with equipment ratings and assumed sequence reactances are given the following table. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance Xn 0.05 per unit on the motor base. Assume that Pre-fault voltage is takin as VF-1.0 ,0° per unit and Pre- fault load current and Δ-Y transformer phase shift are neglected In the...
Most questions answered within 3 hours.
-
Deacon Corporation has provided the following financial data
from its balance sheet and income statement:
Year...
asked 16 minutes ago -
List and discuss at least three variables from everyday life for
which you expect the variable ...
asked 15 minutes ago -
A high-pass filter consists of a 1.60 μF capacitor in series
with a 125 Ω resistor....
asked 17 minutes ago -
A newly developed artificial intelligence has trouble
distinguishing hand-written numbers from hand-written alphabets.
There are pictures...
asked 35 minutes ago -
The carbonate ion CO3 2- has multiple resonance structures.
a. Draw them and assign the hybridization...
asked 28 minutes ago -
In doing an allocation for a basket purchase
Use the individual costs and the total market...
asked 36 minutes ago -
what were the social political and economic causes and impacts of
the late 19th century urban...
asked 33 minutes ago -
if the magnitude of a velocity vector is 10m/s and it
makes an angle of 45...
asked 36 minutes ago -
Which amino acid has a basic R group?
A) tyrosine
B) Isoleucine
C) Glutamic Acid
D)...
asked 47 minutes ago -
Is there the need for the government to have hackers. Please
share your thoughts.
asked 51 minutes ago -
Explain why you should not lose any LDH activity when you
centrifuge a crude sample at...
asked 59 minutes ago -
An AA battery (object), standing on end, is placed to the left
of a diverging lens...
asked 1 hour ago