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Shipboard Electrical Power Systems
book

Shipboard Electrical Power Systems

by Mukund R. Patel
December 2011
Intermediate to advanced content levelIntermediate to advanced
370 pages
12h 24m
English
CRC Press
Content preview from Shipboard Electrical Power Systems
214 Shipboard Electrical Power Systems
The particular solution to Equation (9.8) with the initial condition (9.9) is the fol-
lowing transient fault current,
i t I t e
z z
R
X
t
( ) sin( ) sin( )= +
2
rms
ω θ θ θ θ
ω
(9.10)
where R = total resistance in the fault circuit, X = ωL = total reactance, θ
Z
= tan
−1
(X/R)
= impedance angle, and I
rms
= rms value of the ac component superimposed on the
exponentially decaying transient term. The fault current, therefore, is a complex
function of the switch closing (fault inception) angle θ and the fault circuit time
constant τ = L / R = X / (ωR).
The fault current given by Equation (9.
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Publisher Resources

ISBN: 9781439828175