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Consider the system of Figure(4) The reactances of all components in p.u, are indicated in Table (2)
Consider the system of Figure (4) The reactances of all components in p.u. are indicated in Table (2)
a- Sketch and label carefully the positive, negative, and zero sequence equivalent networks for this system including the switch S. Note that the switch is normally closed when the high voltage side of the transformer is grounded. An open switch means a broken ground connection. 15 Points)
b. Assume that a double line to ground fault takes place on phases B and...
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. a- Find the fault current due to a bolted- three-phase short circuit at bus 3. [10 points] b- Find the fault current supplied by each generator and the voltage at each of the buses 1 and 2 under fault conditions. [10 points] 0.1 p.u 0.06 ?.u. 0.25 p.11....
Consider the system shown in the single-line diagram of Figure 3. All reactances are shown in per unit to the same base. Assume that the voltage at both sources is 1 p.u. c- Find the fault current due to a bolted-three-phase short circuit in the middle of line 1- 3. [5 points d- Find the voltages at buses 1 and 2 under the fault conditions of part c above [5 points] 0.225 pu. 0.035 pu. 0.2p.u ? 0.15 p.u. 0.215...
Consider the system shown in the single-line diagram of Figure 4. The required sequence reactances in per unit to the same base are as follows:
G1 X1 = X2 = 0.12
G2 X1 = X2 = 0.24
G3 X1 = X2 = 0.12
Transformers X11=X12= 0.12
Lines: Positive and X13=X12= 0.20 Negative Sequence
a. Draw the positive-, and negative- sequence reactance diagrams. [6 Points]
b- Determine the The'venin's equivalent of each sequence network as viewed from a fault in the...
Exercise 3 Consider a 2 generator 4 bus power system shown in Figure E3. The impedance data of the network in p.u. are given in Figure E3. A bolted symmetrical three phase fault occurs at bus 4. Assuming the prefault bus voltages as I p.u., calculate the fault current and the current delivered by the generators during the fault and the bus voltages during the fault. j0.12 0.05 0.16 j0.18 j0.12 0.15 0.05 j0.12 j0.1 j0.14 4 (2 Figure E3:...