Homework Answers
Add Answer to:
please solve E and F only
2. (40 points) As shown in Figure 1, a synchronous...
Problem 2 (50 points): The synchronous generator shown in the figure below is operated at its rat...
Problem 2 (50 points): The synchronous generator shown in the figure below is operated at its rated apparent power (100 MVA), 0.95 pf. lagging, and 5% above rated voltage. Determine the subtransient fault current if a three phase short circuit fault occurs at the terminal of the motor (Bus 2) T1 2 100 MVA 100 MVA 13.8 kV 13.8 kV Δ/138 kVY X" = 0.15 X = 0.10 100 MVA 138 kV Y/13.8 kV Δ X0.10 100 MVA 13.8 kV...
QUESTION 4. A single-line diagram of a power system is shown in Figure Q3 below, where...
QUESTION 4. A single-line diagram of a power system is shown in Figure Q3 below, where negative and zero-sequence reactances are also given. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance X.=0.05 per unit on the motor base. Prefault voltage is VF1.05<Oº per unit whereas prefault load current is zero. Take A-Y transformer phase shifts into consideration. M Line tool X, - X2 - 200 100 MVA X =...
2. A single-line diagram of the power system considered is shown in Figure P2a, where negative-...
2. A single-line diagram of the power system considered is shown in Figure P2a, where negative- and zero-sequence reactances are also given. 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. The per-unit zero-, positive and negative-sequence networks on a 100-MVA is shown in Figure P26, 13.8-kV base in the zone of the generator. a. Reduce the sequence networks to their...
2. A three-phase short circuit occurs at the bus 1 for the system shown in figure...
2. A three-phase short circuit occurs at the bus 1 for the system shown in figure below. Neglecting prefault currents and assuming that the generator is operating at its rated voltage, determine the subtransient fault current using superposition. bus 1 bus 2 j6522 ww m AY 25 MVA 13.8 kV 15% 25 MVA 13.2/69 KV 11% 25 MVA 69/13.2 kV 11% 15 MVA 13 kV 15%
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...
Zone 1 Zone 3 Zone 2 Xice j1002 BE SO MW 0.8 pf lagging Vload =...
Zone 1 Zone 3 Zone 2 Xice j1002 BE SO MW 0.8 pf lagging Vload = 30 kV Ti 50 MVA 11/132 kV X= 10% Tz 50 MVA 132/33 kV X=12% Figure 1 2. A 500 MVA, 20 kV, 50 Hz synchronous generator with reactances Xd" = 0.15, Xá = 0.24, Xo = 1.1 p.u. and time constant To = 0.035, Tó' = 2.0, TA = 0.2 seconds is connected to a circuit breaker. The generator is operating at 5%...
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...
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...
Consider the single-line diagram of the three-phase power system shown in Figure 1. Component ratings are...
Consider the single-line diagram of the three-phase power system shown in Figure 1. Component ratings are as follows: Generator G1: 750 MVA, 18 kV, X0.2 per unit Generator G2: 750 MVA, 18 kV, X 0.2 per unit Synchronous Motor M: 1,500 MVA, 20 kV, X-20% A-Y Transformers Ti, T2, T's, & T.: 750 MVA, 500 kV Y/20 kV A, X = 10% Y-Y Transformer T's 1,500 MVA, 500 kV Y/20 kV Y, X-10% ne L:X (a) Using bases of 100...
The three-phase power and line-line ratings of the electric power system shown in Figure 2 are...
The three-phase power and line-line ratings of the electric power system shown in Figure 2 are given below T2 2 Line Vm G M 1 BA Figure 2 One-line diagram for problem 2 G: Ti: T2: Line: M: 60 MVA 50 MVA 50 MVA 20 kV 20/200 kV 200/20 kV 200 kV 18 kV X=9% X=10% X=10% Z=120+j2002 X=8% 43.2 MVA (a) Draw an impedance diagram showing all impedances in per unit on a 100-MVA base. Choose 20 kV as...
Problem 2 (50 points): The synchronous generator shown in the figure below is operated at its rated apparent power (100 MVA), 0.95 pf. lagging, and 5% above rated voltage. Determine the subtransient fault current if a three phase short circuit fault occurs at the terminal of the motor (Bus 2) T1 2 100 MVA 100 MVA 13.8 kV 13.8 kV Δ/138 kVY X" = 0.15 X = 0.10 100 MVA 138 kV Y/13.8 kV Δ X0.10 100 MVA 13.8 kV...
QUESTION 4. A single-line diagram of a power system is shown in Figure Q3 below, where negative and zero-sequence reactances are also given. The neutrals of the generator and A-Y transformers are solidly grounded. The motor neutral is grounded through a reactance X.=0.05 per unit on the motor base. Prefault voltage is VF1.05<Oº per unit whereas prefault load current is zero. Take A-Y transformer phase shifts into consideration. M Line tool X, - X2 - 200 100 MVA X =...
2. A single-line diagram of the power system considered is shown in Figure P2a, where negative- and zero-sequence reactances are also given. 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. The per-unit zero-, positive and negative-sequence networks on a 100-MVA is shown in Figure P26, 13.8-kV base in the zone of the generator. a. Reduce the sequence networks to their...
2. A three-phase short circuit occurs at the bus 1 for the system shown in figure below. Neglecting prefault currents and assuming that the generator is operating at its rated voltage, determine the subtransient fault current using superposition. bus 1 bus 2 j6522 ww m AY 25 MVA 13.8 kV 15% 25 MVA 13.2/69 KV 11% 25 MVA 69/13.2 kV 11% 15 MVA 13 kV 15%
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...
Zone 1 Zone 3 Zone 2 Xice j1002 BE SO MW 0.8 pf lagging Vload = 30 kV Ti 50 MVA 11/132 kV X= 10% Tz 50 MVA 132/33 kV X=12% Figure 1 2. A 500 MVA, 20 kV, 50 Hz synchronous generator with reactances Xd" = 0.15, Xá = 0.24, Xo = 1.1 p.u. and time constant To = 0.035, Tó' = 2.0, TA = 0.2 seconds is connected to a circuit breaker. The generator is operating at 5%...
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...
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...
Consider the single-line diagram of the three-phase power system shown in Figure 1. Component ratings are as follows: Generator G1: 750 MVA, 18 kV, X0.2 per unit Generator G2: 750 MVA, 18 kV, X 0.2 per unit Synchronous Motor M: 1,500 MVA, 20 kV, X-20% A-Y Transformers Ti, T2, T's, & T.: 750 MVA, 500 kV Y/20 kV A, X = 10% Y-Y Transformer T's 1,500 MVA, 500 kV Y/20 kV Y, X-10% ne L:X (a) Using bases of 100...
The three-phase power and line-line ratings of the electric power system shown in Figure 2 are given below T2 2 Line Vm G M 1 BA Figure 2 One-line diagram for problem 2 G: Ti: T2: Line: M: 60 MVA 50 MVA 50 MVA 20 kV 20/200 kV 200/20 kV 200 kV 18 kV X=9% X=10% X=10% Z=120+j2002 X=8% 43.2 MVA (a) Draw an impedance diagram showing all impedances in per unit on a 100-MVA base. Choose 20 kV as...
Most questions answered within 3 hours.
-
The time to complete a standardized exam is approximately normal
with a mean of 70 minutes...
asked 1 hour ago -
Two thousand randomly selected adults were asked whether or not
they have ever shopped on the...
asked 1 hour ago -
Estimate the diffusion coefficient for methyl phenyl sulfide in
water at 25 degrees Celcius.
asked 50 minutes ago -
10.g of a certain metal absorb 40. cal of heat and the temperature
is abserved to...
asked 1 hour ago -
How many milliliters of 0.0695 M Ca( OH)
2would be required to exactly neutralize 176 mL...
asked 2 hours ago -
A telephone survey uses a random digit dialing machine to call
subjects. The random digit dialing...
asked 2 hours ago -
How can having too little or too much of a certain
protein cause problems for an...
asked 4 hours ago -
Assume a muscle has a PCSA = 20 cm2 and Lo = 12 cm. Assume it...
asked 5 hours ago -
What is the yield to maturity of a ten-year, $1,000 bond with a
5.2% coupon rate...
asked 6 hours ago -
A mass m = 5 kg is tied on one end of a rope and is...
asked 6 hours ago -
The Average sales price of single-family houses in Charlotte is
$210,000 with a standard deviation of...
asked 6 hours ago -
Target Costing
Laser Impressions, Inc., manufactures color laser printers.
Model J20 presently sells for $225 and...
asked 6 hours ago