?? chp5ex3.m
字號:
z = .036 + j* 0.3; y = j*4.22/1000000; Length = 130;
Vs3ph = 345; Ism = 0.4; %KA;
As = -acos(0.95);
Vs = Vs3ph/sqrt(3) + j*0; % kV (sending end phase voltage)
Is = Ism*(cos(As) + j*sin(As));
[Z,Y, ABCD] = zy2abcd(z, y, Length);
VrIr = inv(ABCD)* [Vs; Is]; % column vector [Vr; Ir]
Vr = VrIr(1);
Vr3ph = sqrt(3)*abs(Vr); % kV(receiving end L-L voltage)
Ir = VrIr(2); Irm = 1000*abs(Ir);% A (receiving end current)
pfr= cos(angle(Vr)- angle(Ir)); % (receiving end power factor)
Sr = 3*Vr*conj(Ir); % MVA (receiving end power)
REG = (Vs3ph/abs(ABCD(1,1)) - Vr3ph)/Vr3ph *100;
fprintf(' Ir = %g A', Irm), fprintf(' pf = %g\n', pfr)
fprintf(' Vr = %g L-L kV\n', Vr3ph)
fprintf(' Pr = %g MW', real(Sr))
fprintf(' Qr = %g Mvar\n', imag(Sr))
fprintf(' Percent voltage Reg. = %g\n', REG)
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