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2. (15 pts)You perform a fault study and find that the magnitude of the a phase...
The single-line diagram of a three-phase power system is shown. Equipment ratings are given as follows
The single-line diagram of a three-phase power system is shown. Equipment ratings are given as follows: The inductor connected to generator 3 neutral has a reactance of \(0.05\) pu using generator 3 ratings as a base.1. Draw the zero-, positive-, and negative -sequence reactance diagrams using a \(1000 \mathrm{MVA}, 765 \mathrm{kV}\) base in the zone of line \(1-2\).2. Faults at bus 2 are of interest. Determine the Thevenin equivalent of each sequence network as viewed from the fault bus. Prefault voltage...
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. Assu...
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:...
Note: Only problem 2 is required. Problem 2 Solve the Problem 1 above using Zhmus method...
Note: Only problem 2 is required.
Problem 2 Solve the Problem 1 above using Zhmus method for the mentioned fault conditions in Problem 1 Find the current in bus sections 1-2 and 2-3. Also find the bus voltages during fault. Problem 1 Consider a 2-generator power system shown in Figure 1. The impedance data of the network is given in Figure 1. If the following cases of fault conditions occur at Bus 2 of the system with 4 X1 =...
Problem 2 (10 pts) 132 kV TL 40 km 1 pu mid-point L-E fault 60 ΛΤΑ TL: Transmission line. L-E fault: Line-to-earth fault. Z. 0.07 pu 0.1 pu Generator 0.1 pu 0.1 pu 0.1 pu Transformers 2.5x Z] Transmi...
Problem 2 (10 pts) 132 kV TL 40 km 1 pu mid-point L-E fault 60 ΛΤΑ TL: Transmission line. L-E fault: Line-to-earth fault. Z. 0.07 pu 0.1 pu Generator 0.1 pu 0.1 pu 0.1 pu Transformers 2.5x Z] Transmission Line 0.7 Ω/km 0.7 Ω/km Suppose a single L-E fault happens at the mid-point of the transmission line. Determine the per unit phase voltage and current at point P (Choose Sbase-60 MVA and Vbase-132 kV). (4 pts) * The phase impedance...
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...
Bus A Bus B R1 T1 line 1 20% 80% line 2 T2 R2 110 kV 11 kV The fault is located at point F, which...
Bus A Bus B R1 T1 line 1 20% 80% line 2 T2 R2 110 kV 11 kV The fault is located at point F, which is 20% of the total line 2 length from Bus B Fault MVA 1524.20471 Three-phase fault level in MVA at bus A SPFL (kA) 8 MVA1 MVA2 X1 (96) X2 (96) R1 (2) R2 (Q) z' (Q) Zo (2) Rf (Q) Single phase to ground fault level (kA) at bus A Transformer 1 MVA...
Problem5 1 pu The per-unit line impedances between buses 1-6 in the system shown above ane 1-2 0....
Problem5 1 pu The per-unit line impedances between buses 1-6 in the system shown above ane 1-2 0.01+j0.05 0.006 j0.08 0.008+j0.04 0.02+j0.1 0.003+j0.02 2-3 4-5 5-6 Fill in the following tables for the cases when there is a three-phase ground fault at the indicated bus. Here I is the current through breaker B and V is the voltage at bus k fault at bus 1 111 fault at bus
Problem5 1 pu The per-unit line impedances between buses 1-6 in...
Single line to ground fault analysis Example 9.4 Problem 1 A three-phase, il kV, 30 MVA alternato...
I need help in matlab codes please
Single line to ground fault analysis Example 9.4 Problem 1 A three-phase, il kV, 30 MVA alternator with grounded neutral has a direct axis subtransien pu respectively based on system base. A single line to ground fault has occurred in phase a. Determine the fault current, line to ground voltages in pu. t, negative sequence and zero sequence reactances of 0.2 pu, 0.3 pu and 0.1 Solution: Phase voltage E.0 pu From equation...
BUS 1 BUS 2 LINE 1 T1 L1 T2 G1 G2 R = 0,6 pu LINE 2 L2 T3 G3 BUS 3 a) For the above network, draw positive, negative an...
BUS 1 BUS 2 LINE 1 T1 L1 T2 G1 G2 R = 0,6 pu LINE 2 L2 T3 G3 BUS 3 a) For the above network, draw positive, negative and zero sequence networks (60 marks) b) Provide the main mathematical steps that will allow you to calculate the magnitude (in ampere) of the phase to phase fault current at BUS 1. As part of your answer you should show clearly, on a diagram, how the networks of part (a)...
For a three-bus power system given below, find the fault current when a) L-G fault, b)...
For a three-bus power system given below, find the fault current when a) L-G fault, b) L-L, and c) L-L-G fault occurs at Bus-3. Use pre-fault voltage of 1 p.u. Assume fault impedance is zero. All impedances in pu with respect to a common base. X+seq=j0.25 X.seq=j0.15 Xoseq=j0.10 X+seq=j0.05 X-seq=j0.05 Xoseg=j0.18 m X+seq=j0.25 X-seq=j0.15 Xoseq=j0.10 m Xneutral=jO m m3 Gen-1 Gen-2 X+seq=j0.025 X.seq=j0.025 Xoseq=j0.09 X+seq=j0.025 X-seq=j0.025 Xoseq=j0.09
The single-line diagram of a three-phase power system is shown. Equipment ratings are given as follows: The inductor connected to generator 3 neutral has a reactance of \(0.05\) pu using generator 3 ratings as a base.1. Draw the zero-, positive-, and negative -sequence reactance diagrams using a \(1000 \mathrm{MVA}, 765 \mathrm{kV}\) base in the zone of line \(1-2\).2. Faults at bus 2 are of interest. Determine the Thevenin equivalent of each sequence network as viewed from the fault bus. Prefault voltage...
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:...
Note: Only problem 2 is required.
Problem 2 Solve the Problem 1 above using Zhmus method for the mentioned fault conditions in Problem 1 Find the current in bus sections 1-2 and 2-3. Also find the bus voltages during fault. Problem 1 Consider a 2-generator power system shown in Figure 1. The impedance data of the network is given in Figure 1. If the following cases of fault conditions occur at Bus 2 of the system with 4 X1 =...
Problem 2 (10 pts) 132 kV TL 40 km 1 pu mid-point L-E fault 60 ΛΤΑ TL: Transmission line. L-E fault: Line-to-earth fault. Z. 0.07 pu 0.1 pu Generator 0.1 pu 0.1 pu 0.1 pu Transformers 2.5x Z] Transmission Line 0.7 Ω/km 0.7 Ω/km Suppose a single L-E fault happens at the mid-point of the transmission line. Determine the per unit phase voltage and current at point P (Choose Sbase-60 MVA and Vbase-132 kV). (4 pts) * The phase impedance...
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...
Bus A Bus B R1 T1 line 1 20% 80% line 2 T2 R2 110 kV 11 kV The fault is located at point F, which is 20% of the total line 2 length from Bus B Fault MVA 1524.20471 Three-phase fault level in MVA at bus A SPFL (kA) 8 MVA1 MVA2 X1 (96) X2 (96) R1 (2) R2 (Q) z' (Q) Zo (2) Rf (Q) Single phase to ground fault level (kA) at bus A Transformer 1 MVA...
Problem5 1 pu The per-unit line impedances between buses 1-6 in the system shown above ane 1-2 0.01+j0.05 0.006 j0.08 0.008+j0.04 0.02+j0.1 0.003+j0.02 2-3 4-5 5-6 Fill in the following tables for the cases when there is a three-phase ground fault at the indicated bus. Here I is the current through breaker B and V is the voltage at bus k fault at bus 1 111 fault at bus
Problem5 1 pu The per-unit line impedances between buses 1-6 in...
I need help in matlab codes please
Single line to ground fault analysis Example 9.4 Problem 1 A three-phase, il kV, 30 MVA alternator with grounded neutral has a direct axis subtransien pu respectively based on system base. A single line to ground fault has occurred in phase a. Determine the fault current, line to ground voltages in pu. t, negative sequence and zero sequence reactances of 0.2 pu, 0.3 pu and 0.1 Solution: Phase voltage E.0 pu From equation...
BUS 1 BUS 2 LINE 1 T1 L1 T2 G1 G2 R = 0,6 pu LINE 2 L2 T3 G3 BUS 3 a) For the above network, draw positive, negative and zero sequence networks (60 marks) b) Provide the main mathematical steps that will allow you to calculate the magnitude (in ampere) of the phase to phase fault current at BUS 1. As part of your answer you should show clearly, on a diagram, how the networks of part (a)...
For a three-bus power system given below, find the fault current when a) L-G fault, b) L-L, and c) L-L-G fault occurs at Bus-3. Use pre-fault voltage of 1 p.u. Assume fault impedance is zero. All impedances in pu with respect to a common base. X+seq=j0.25 X.seq=j0.15 Xoseq=j0.10 X+seq=j0.05 X-seq=j0.05 Xoseg=j0.18 m X+seq=j0.25 X-seq=j0.15 Xoseq=j0.10 m Xneutral=jO m m3 Gen-1 Gen-2 X+seq=j0.025 X.seq=j0.025 Xoseq=j0.09 X+seq=j0.025 X-seq=j0.025 Xoseq=j0.09
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