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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 : 2.2 :
// Page number 101
clear ; clc ; close ; // Clear the work space and console
// Given data
l = 100.0 // Length of 3-phase transmission line(km)
D = 120.0 // Distance between conductors(cm)
d = 0.5 // Diameter of conductor(cm)
// Calculations
r_GMR = 0.7788*d/2.0 // GMR of conductor(cm)
L = 2.0*10**-4*log(D/r_GMR) // Inductance per phase(H/km)
L_l = L*l // Inductance per phase for 100km length(H)
// Results
disp("PART II - EXAMPLE : 2.2 : SOLUTION :-")
printf("\nInductance per phase of the system, L = %.4f H \n", L_l)
printf("\nNOTE: ERROR: In textbook to calculate L, log10 is used instead of ln i.e natural logarithm. So, there is change in answer")
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