Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
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please solve these 2 questions handwritten step by step solution to make me understanding well thank you
Transcribed Image Text:1. A 800 kV transmission line has per phase con-
ductor inductance of 1.0 mH/km and capaci-
tance of 10.5 nF/km. Find the following:
(a) The line surge/characteristic impedance.
(b) The ideal power transfer capability of the
line.
(c) Transient overvoltage generated when the
line conductor is struck by lightning and a
peak impulse current of 30 kA is injected.
2. A circuit breaker (CB) installed on the line in
Q.1 opens when a fault occurs. What will be
the peak values of the 'switching overvoltages'
produced when:
(a) The CB opens at the instant of current
zero crossing of the power frequency fault
current?
(b) The CB interrupts a power frequency fault
current at its instant magnitude of 10 kA?
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