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clc
// Fundamental of Electric Circuit
// Charles K. Alexander and Matthew N.O Sadiku
// Mc Graw Hill of New York
// 5th Edition
// Part 2 : AC Circuits
// Chapter 12 : Three Phase Circuit
// Example 12 - 9
clear; clc; close;
//
// Given data
ZA = complex(15,0);
ZB = complex(10,5);
ZC = complex(6,-8);
VL_mag = 100.0000;
VL_angle = 0.0000;
//
// Calculations Voltage Line a
V_a_mag = 100.0000;
V_a_angle = 0.0000;
// Calculations Voltage Line b
V_b_mag = V_a_mag;
V_b_angle = 120.0000;
// Calculations Voltage Line c
V_c_mag = V_a_mag;
V_c_angle = -120.0000
// Calculations Line Current a
I_a_mag = V_a_mag/norm(ZA);
ZA_real = real(ZA);
ZA_imag = imag(ZA);
ZA_angle = atand(ZA_imag,ZA_real)
I_a_angle = V_a_angle - ZA_angle;
// Calculations Line Current b
I_b_mag = V_b_mag/norm(ZB);
ZB_real = real(ZB);
ZB_imag = imag(ZB);
ZB_angle = atand(ZB_imag,ZB_real)
I_b_angle = V_b_angle - ZB_angle;
// Calculations Line Current c
I_c_mag = V_c_mag/norm(ZC);
ZC_real = real(ZC);
ZC_imag = imag(ZC);
ZC_angle = atand(ZC_imag,ZC_real)
I_c_angle = V_c_angle - ZC_angle;
// Calculations Neutral Current
I_a_real = I_a_mag * cosd(I_a_angle);
I_a_imag = I_a_mag * sind(I_a_angle);
I_b_real = I_b_mag * cosd(I_b_angle);
I_b_imag = I_b_mag * sind(I_b_angle);
I_c_real = I_c_mag * cosd(I_c_angle);
I_c_imag = I_c_mag * sind(I_c_angle);
I_neutral_real = I_a_real + I_b_real + I_c_real;
I_neutral_imag = I_a_imag + I_b_imag + I_c_imag;
I_neutral_mag = norm(complex(I_neutral_real,I_neutral_imag))
I_neutral_angle = atand(I_neutral_imag,I_neutral_real)
//
disp("Example 12-9 Solution : ");
printf(" \n I_a_mag = Magnitude of Line Currents a = %.3f A",I_a_mag)
printf(" \n I_a_angle = Angle of Line Current a = %.3f Degree",I_a_angle)
printf(" \n I_b_mag = Magnitude of Line Currents b = %.3f A",I_b_mag)
printf(" \n I_b_angle = Angle of Line Current b = %.3f Degree",I_b_angle)
printf(" \n I_c_mag = Magnitude of Line Currents c = %.3f A",I_c_mag)
printf(" \n I_c_angle = Angle of Line Current c = %.3f Degree",I_c_angle)
printf(" \n I_neutral_mag = Magnitude of Neutral Current = %.3f A",I_neutral_mag)
printf(" \n I_neutral_angle = Angle of Neutral Current = %.3f Degree",(180.0000 + I_neutral_angle))
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