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1、Bus=[1,0,0;2,100,60;3,90,40;4,120,80;5,60,30;6,60,20;7,200,100;8,200,100;9,60,20;10,60,20;11,45,30;12,60,35;13,60,35;14,120,80;15,60,10;16,60,20;17,60,20;18,90,40;19,90,40;20,90,40;21,90,40;22,90,40;23,90,40;24,420,200;25,420,200;26,60,25;27,60,25;28,60
2、,20;29,120,70;30,200,600;31,150,70;32,210,100;33,60,40;];Branch=[1,1,2,0.0922,0.0407;2,2,3,0.4930,0.2511;3,3,4,0.3660,0.1864;4,4,5,0.3811,0.1941;5,5,6,0.8190,0.7070;6,6,7,0.1872,0.6188;7,7,8,0.7144,0.2351;8,8,9,1.0300,0.7400;9,9,10,1.0440,0.7400;10,10,1
3、1,0.1966,0.065;11,11,12,0.3744,0.1238;12,12,13,1.4680,1.1550;13,13,14,0.5416,0.7129;14,14,15,0.5910,0.5260;15,15,16,0.7463,0.5450;16,16,17,1.2890,1.7210;17,17,18,0.7320,0.5740;18,2,19,0.1640,0.1565;19,19,20,1.5042,1.3554;20,20,21,0.4095,0.4784;21,21,22,
4、0.7089,0.9373;22,3,23,0.4512,0.3083;23,23,24,0.8980,0.7091;24,24,25,0.8960,0.7011;25,6,26,0.2030,0.1034;26,26,27,0.2842,0.1447;27,27,28,1.0590,0.9337;28,28,29,0.8042,0.7006;29,29,30,0.5075,0.2585;30,30,31,0.9744,0.9630;31,31,32,0.3105,0.3619;32,32,33,0.
5、3410,0.5302;];[busnum,row]=size(Bus);[branchnum,row]=size(Branch);soubus=Branch(:,2);mobus=Branch(:,3);Vbus=ones(busnum,1);Vbus(:,1)=12.66;Vbus1=Vbus;Ploss=zeros(busnum,1);Qloss=zeros(busnum,1);e=1;k=0;Branch1=Branch;n=1;while~isempty(Branch1)m=1;[s,row
6、]=size(Branch1);whiles>0t=find(Branch1(:,2)==Branch1(s,3));ifisempty(t)T1(n,:)=Branch1(s,:);n=n+1;elseT2(m,:)=Branch1(s,:);m=m+1;end;s=s-1;end;Branch1=T2;T2=[];end;whilee>1.0e-05P=zeros(busnum,1);Q=zeros(busnum,1);fors=1:branchnumi=T1(s,2);j=T1(s,3);R=T
7、1(s,4);X=T1(s,5);Pload=Bus(j,2);Qload=Bus(j,3);II=((Pload+P(j))^2+(Qload+Q(j))^2)/(Vbus(j)^2*1000);Ploss(i,j)=II*R;Qloss(i,j)=II*X;P(i,j)=Pload+Ploss(i,j)+P(j);Q(i,j)=Qload+Ploss(i,j)+Q(j);P(i)=P(i)+P(i,j);Q(i)=Q(i)+Q(i,j);end;fors=branchnum:-1:1i=T1(s,
8、2);j=T1(s,3);R=T1(s,4);X=T1(s,5);Vbus(j)=(Vbus(i)-(P(i,j)*R+Q(i,j)*X)/(Vbus(i)*1000))^2+((P(i,j)*X-Q(i,j)*R)/(Vbus(i)*1000))^2;Vbus(j)=sqrt(Vbus(j));end;e=max(abs(Vbus1-Vbus));Vbus1=Vbus;k=k+1;end
