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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 4: OVERHEAD LINE INSULATORS
// EXAMPLE : 4.4 :
// Page number 184-185
clear ; clc ; close ; // Clear the work space and console
// Given data
V_3 = 17.5 // Voltage across line unit(kV)
c = 1.0/8 // Shunt capacitance = 1/8 of insulator capacitance
n = 3.0 // Number of insulators
// Calculations
K = c // String constant
V_1 = V_3/(1+3*K+K**2) // Voltage across top unit(kV)
V_2 = (1+K)*V_1 // Voltage across middle unit(kV)
V = V_1+V_2+V_3 // Voltage between line & earth(kV)
eff = V*100/(n*V_3) // String efficiency(%)
// Results
disp("PART II - EXAMPLE : 4.4 : SOLUTION :-")
printf("\nLine to neutral voltage, V = %.2f kV", V)
printf("\nString efficiency = %.2f percent", eff)
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