Appendix 4
CHAPTER 2
Example 2.7
Calculate the inductance of a conductor (line-to-neutral) of a three-phase system as shown in Fig. 2.17, which has 1.2 cm diameter and conductors are placed at the corner of an equilateral triangle of sides 1.5 m.
MATLAB programme for Example 2.7
% TO FIND INDUCTANCE
clc;
clear all;
d = input(’ENTER THE DIAMETER OF THE CONDUCTOR IN cm:’)
s = input(’ENTER THE LENGTH OF THE SIDE OF THE TRIANGLE in metres:’)
r = d/2;
effR = 0.7788*r;
L = 2*10^(-7)*log(s*100/effR)*1000
Result:
ENTER THE DIAMETER OF THE CONDUCTOR IN cm:1.2
d=
1.200
ENTER THE LENGTH OF THE SIDE OF THE TRIANGLE in metres:1.5
s=
1.500
L (H/km) =
0.00115429238467
Example 2.9
Calculate the inductance per ...
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