July 2008
Intermediate to advanced
625 pages
17h 13m
English
Content preview from Electric Power Transmission and Distribution
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Appendix 4
SOLUTIONS USING MATLAB PROGRAMS
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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