Chapter9 - Substations and earthing

Problem 9.1 - page 252

In [2]:
from numpy import pi
#Given Data :
V=250 #in volt
f=50 #in Hz
l=300 #in km
C_earth=0.03 #in uF
C=l*C_earth*10**-6 #in F
XL=1/(3*2*pi*f*C) #in ohm
print "Reactance required for the Peterson coil = %.f ohm" %XL
Reactance required for the Peterson coil = 118 ohm