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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.

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.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Subject is Power system analysis
Statement 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-X1= j 0.1 Xy=j 0.35 ntn 11 KV A X-j0.3 X-j0.3 X-j0.05/ 110 KV 20 MVA Xy-X;=Xy=J 0.1 X=X,=X;=j 0.1 Transmission circuit X,=j0.25 |X;=j0.25 X-j0.05 Y B D |X=X,-j 0.1 X-j 0.35 X-X-X;-J 0.1 X-X,=X;=j 0.1
Transcribed Image Text:Statement 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-X1= j 0.1 Xy=j 0.35 ntn 11 KV A X-j0.3 X-j0.3 X-j0.05/ 110 KV 20 MVA Xy-X;=Xy=J 0.1 X=X,=X;=j 0.1 Transmission circuit X,=j0.25 |X;=j0.25 X-j0.05 Y B D |X=X,-j 0.1 X-j 0.35 X-X-X;-J 0.1 X-X,=X;=j 0.1
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