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A single line diagram of a power system is shown in Fig.3.1. All the sequence reactances of the power system components are depicted in per unit on 20 MVA base, 110KV (L-L) in transmission circuit. If a single line to ground fault occurs on phase a through a reactance of 150 ohm at F, determine the current in ampere fed into the fault. The fault point F is assumed to be at 65% of transmission line length from the bus bar connected to generators A and B. 20 MVA A Xe-Xpj 0.1 X-j 0.35 11 KV C X-j0.3 X=j0.3 X=j0.05/ 110 KV 20 MVA X-X,-X-J 0.1 X=X,=X;=j 0.1 Transmission circuit X,=j0.25 X;=j0.25 X-j0.05 Y D |Xx=X;= j 0.1 X;~j 0.35 X-X-X;-J 0.1 X-X;=X;=j 0.1

A single line diagram of a power system is shown in Fig.3.1. All the sequence reactances of the power system components are depicted in per unit on 20 MVA base, 110KV (L-L) in transmission circuit. If a single line to ground fault occurs on phase a through a reactance of 150 ohm at F, determine the current in ampere fed into the fault. The fault point F is assumed to be at 65% of transmission line length from the bus bar connected to generators A and B. 20 MVA A Xe-Xpj 0.1 X-j 0.35 11 KV C X-j0.3 X=j0.3 X=j0.05/ 110 KV 20 MVA X-X,-X-J 0.1 X=X,=X;=j 0.1 Transmission circuit X,=j0.25 X;=j0.25 X-j0.05 Y D |Xx=X;= j 0.1 X;~j 0.35 X-X-X;-J 0.1 X-X;=X;=j 0.1

Power System Analysis and Design (MindTap Course List)
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.49P: Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings...
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A single line diagram of a power system is shown in Fig.3.1. All the sequence reactances of the power system components are depicted in per unit on 20 MVA base, 110KV (L-L) in transmission circuit. If a single line to ground fault occurs on phase a through a reactance of 150 ohm at F, determine the current in ampere fed into the fault. The fault point F is assumed to be at 65% of transmission line length from the bus bar connected to generators A and B. 20 MVA X-X-j 0.1 X-j 0.35 ntn 11 KV A X,-j0.3 X=j0.3 X=j0.05 C 110 KV 20 MVA X-X-X;-J 0.1 X=X=X=j 0.1 X=j0.25 Xx=j0.25 Xo=j0.05 Transmission circuit CY Y B D |X=Xy=j 0.1 X;-j 0.35 X-X,-X3-J 0.1 X-X,=X;=j 0.1
Transcribed Image Text:A single line diagram of a power system is shown in Fig.3.1. All the sequence reactances of the power system components are depicted in per unit on 20 MVA base, 110KV (L-L) in transmission circuit. If a single line to ground fault occurs on phase a through a reactance of 150 ohm at F, determine the current in ampere fed into the fault. The fault point F is assumed to be at 65% of transmission line length from the bus bar connected to generators A and B. 20 MVA X-X-j 0.1 X-j 0.35 ntn 11 KV A X,-j0.3 X=j0.3 X=j0.05 C 110 KV 20 MVA X-X-X;-J 0.1 X=X=X=j 0.1 X=j0.25 Xx=j0.25 Xo=j0.05 Transmission circuit CY Y B D |X=Xy=j 0.1 X;-j 0.35 X-X,-X3-J 0.1 X-X,=X;=j 0.1
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