(a) In practice, one deals with the capacitive reactance of the line in ohms mi...
Question:
(a) In practice, one deals with the capacitive reactance of the line in ohms ⋅ mi to neutral. Show that Eq. (4.9.15) of the text can be rewritten as
XC=k′logDr ohms ⋅ mi to netural =x′d+x′a
where x′d=k′logD is the capacitive reactance spacing factor
x′a=k′log1r is the capacitive reactance at 1−ft spacing
k′=(4.1×106)/f=0.06833×106 at f=60 Hz
(b) Determine the capacitive reactance in Ω⋅mi. for a single-phase line of Problem 4.14. If the spacing is doubled, how does the reactance change?
Eq. (4.9.15)
Problem 4.14
(a) In practice, one deals with the inductive reactance of the line per phase per mile and use the logarithm to the base 10. Show that Eq. (4.5.9) of the text can be rewritten as
x=klogDr′ ohms per mile per phase =xd+xa
where xd=klogD is the inductive reactance spacing factor in ohms per mile xa=klog1r′ is the inductive reactance at 1 -ft spacing in ohms per mile k=4.657×10−3f=0.2794 at 60 Hz
(b) Determine the inductive reactance per mile per phase at 60 Hz for a single-phase line with phase separation of 10ft and conductor radius of 0.06677ft. If the spacing is doubled, how does the reactance change?
Eq. (4.5.9)
Step by Step Answer:
Power System Analysis And Design
ISBN: 9781305632134
6th Edition
Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma