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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 : 2.9 :
// Page number 108-109
clear ; clc ; close ; // Clear the work space and console
// Given data
d = 1.8 // Diameter of conductor(cm)
D_A_B = 4.0 // Distance between conductor A & B(cm)
D_B_C = 9.0 // Distance between conductor B & C(cm)
D_A_C = 6.0 // Distance between conductor A & C(cm)
// Calculations
D_eq = (D_A_B*D_B_C*D_A_C)**(1.0/3) // Equivalent distance(cm)
r_GMR = 0.7788*d/2.0 // GMR(cm)
L = 2*10**-4*log(D_eq/r_GMR) // Inductance per phase(H/km)
L_mH = L*1000.0 // Inductance per phase(mH/km)
// Results
disp("PART II - EXAMPLE : 2.9 : SOLUTION :-")
printf("\nInductance of the line per phase, L = %.3f mH/km \n", L_mH)
printf("\nNOTE: ERROR: Calculation mistake in the textbook")
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