10.11 A line to line fault occurs between two phases at the remote end of line of the system in problem 10.10. Find (a) fault current (b) line to neutral voltage of the healthy phase at fault point. [(a) 1.545 kA (b) 17.5 kV] 10.10 A 3-phase 33 kV, 37.5 MVA alternator is connected to a 33 kV overhead line which develops an earthfault on one phase at the remote end. The positive, negative and zero sequence reactances of the alternatorare 0.18, 0.12 and 0.1 per unit of its rating while those for the line are 6.3, 6.3 and 12.6 ohm per conductor,Find (a) fault current (b) line to neutral voltages at alternator terminals.(a) I, = 1.555 k A (b) V= 13 20 kV[Vm = 18 2-119.16°kV, Van = 18 2 119.16° kV]10.11 A line to line fault occurs between two phases at the remote end of line of the system in problem 10.10.Find (a) fault current (b) line to neutral voltage of the healthy phase at fault point.[(a) 1.545 kA (b) 17.5 kV]

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10.11 A line to line fault occurs between two phases at the remote end of line of the system in problem 10.10. Find (a) fault current (b) line to neutral voltage of the healthy phase at fault point. [(a) 1.545 kA (b) 17.5 kV]

10.11 A line to line fault occurs between two phases at the remote end of line of the system in problem 10.10. Find (a) fault current (b) line to neutral voltage of the healthy phase at fault point. [(a) 1.545 kA (b) 17.5 kV]

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

Chapter8: Symmetrical Components

Section: Chapter Questions

Problem 8.34P

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Question

10.10 A 3-phase 33 kV, 37.5 MVA alternator is connected to a 33 kV overhead line which develops an earth
fault on one phase at the remote end. The positive, negative and zero sequence reactances of the alternator
are 0.18, 0.12 and 0.1 per unit of its rating while those for the line are 6.3, 6.3 and 12.6 ohm per conductor,
Find (a) fault current (b) line to neutral voltages at alternator terminals.
(a) I, = 1.555 k A (b) V= 13 20 kV
[Vm = 18 2-119.16°kV, Van = 18 2 119.16° kV]
10.11 A line to line fault occurs between two phases at the remote end of line of the system in problem 10.10.
Find (a) fault current (b) line to neutral voltage of the healthy phase at fault point.
[(a) 1.545 kA (b) 17.5 kV]

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