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// A Texbook on POWER SYSTEM ENGINEERING
// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
// DHANPAT RAI & Co.
// SECOND EDITION
// PART II : TRANSMISSION AND DISTRIBUTION
// CHAPTER 2: CONSTANTS OF OVERHEAD TRANSMISSION LINES
// EXAMPLE : 2.6 :
// Page number 104
clear ; clc ; close ; // Clear the work space and console
// Given data
D_a_b = 175.0 // Distance between conductors a & b(cm)
D_a_aa = 90.0 // Distance between conductors a & a'(cm)
d = 2.5 // Diameter of conductor(cm)
// Calculations
GMR = 0.7788*d/2.0 // GMR(cm)
D_a_a = GMR // Self GMD of conductor a(cm)
D_aa_aa = D_a_a // Self GMD of conductor a'(cm)
D_aa_a = 90.0 // Distance between conductors a' & a(cm)
D_s = (D_a_a*D_a_aa*D_aa_aa*D_aa_a)**(1.0/4) // Self GMD of conductor A = Self GMD of conductor B(cm)
D_a_bb = (D_a_aa**2+D_a_b**2)**(1.0/2) // Distance between conductors a & b'(cm)
D_m = ((D_a_b*D_a_bb)**2)**(1.0/4) // Mutual GMD(cm)
L = 4*10**-4*log(D_m/D_s) // Inductance of the line(H/km)
// Results
disp("PART II - EXAMPLE : 2.6 : SOLUTION :-")
printf("\nInductance of the line, L = %.1e H/km", L)
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