1 files changed, 58 insertions, 0 deletions
diff --git a/3793/CH13/EX13.8/exp_13_8.sce b/3793/CH13/EX13.8/exp_13_8.sce
new file mode 100644
index 000000000..91072a828
--- /dev/null
+++ b/3793/CH13/EX13.8/exp_13_8.sce
@@ -0,0 +1,58 @@
+clear;
+clc;
+Ybus=zeros(4,4);
+Za=%i*.1;
+Z12=%i*.25;
+Z14=%i*.4;
+Z43=%i*.1;
+Z42=%i*.2;
+Z32=%i*.1;
+Z13=%i*.5;
+Zg=%i*4;
+
+V1=1;
+V2=complex(.9787,-.0513);
+V3=complex(1.019,.0445);
+V4=complex(1.0098,-.0176);
+Ybus(1,1)=1/Zg+1/Z12+1/Z13+1/Z14;
+Ybus(1,2)=-1/Z12;
+Ybus(2,1)=Ybus(1,2);
+Ybus(1,3)=-1/Z13;
+Ybus(3,1)=Ybus(1,3);
+Ybus(1,4)=-1/Z14;
+Ybus(4,1)=Ybus(1,4);
+Ybus(2,2)=1/Z12+1/Z32+1/Z42;
+Ybus(2,3)=-1/Z32;
+Ybus(3,2)=Ybus(2,3);
+Ybus(2,4)=-1/Z42;
+Ybus(4,2)=Ybus(2,4);
+Ybus(3,3)=1/Z13+1/Z43+1/Z32;
+Ybus(3,4)=-1/Z43;
+Ybus(4,3)=Ybus(3,4);
+Ybus(4,4)=1/Z14+1/Z43+1/Z42;
+Z=inv(Ybus);
+Zt34=Z(3,3)+Z(4,4)-2*Z(3,4);
+V=[V1;V2;V3;V4];
+I12=(V1-V2)/Z12;
+I13=(V1-V3)/Z13;
+I14=(V1-V4)/Z14;
+I23=(V2-V3)/Z32;
+I24=(V2-V4)/Z42;
+I34=(V3-V4)/Z43;
+Zaa=-Za;
+Zden=Zt34-Zaa;
+L1234=Zaa/Z12*((Z(1,3)-Z(1,4))-(Z(2,3)-Z(2,4)))/Zden;
+L1334=Zaa/Z13*((Z(1,3)-Z(1,4))-(Z(3,3)-Z(3,4)))/Zden;
+L1434=Zaa/Z14*((Z(1,3)-Z(1,4))-(Z(4,3)-Z(4,4)))/Zden;
+L2334=Zaa/Z32*((Z(2,3)-Z(2,4))-(Z(3,3)-Z(3,4)))/Zden;
+L2434=Zaa/Z42*((Z(2,3)-Z(2,4))-(Z(4,3)-Z(4,4)))/Zden;
+Zb=-Za;
+Zt23=Z(2,2)+Z(3,3)-2*Z(2,3);
+Zden1=Zt23-Zb;
+L1423=Zb/Z14*((Z(1,2)-Z(1,3))-(Z(4,2)-Z(4,3)))/Zden1;
+L3423=Zb/Z43*((Z(3,2)-Z(3,3))-(Z(4,2)-Z(4,3)))/Zden1;
+L11=(L1423+L1434*L3423)/(1-L2334*L3423);
+L12=(L1434+L1423*L2334)/(1-L2334*L3423);
+I14d=I14+(L11*I23+L12*I34);
+mprintf("Change in current line connected buses 1-4 is %.4f+%.4f",real(I14d),imag(I14d));
+