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)
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ISBN:9780133923605
Author:Robert L. Boylestad
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Chapter1: Introduction
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Subject is Power system analysis
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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