潮流计算的MATLAB源程序

%简单潮流计算的牛顿拉夫逊程序，相关的原始数据数据数据输入格式如下：%B1是支路参数矩阵，第一列和第二列是节点编号。节点编号由小到大编写%对于含有变压器的支路，第一列为低压侧节点编号，第二列为高压侧节点%编号，将变压器的串联阻抗置于低压侧处理。%第三列为支路的串列阻抗参数。%第四列为支路的对地导纳参数。%第五列为含变压器支路的变压器的变比%第六列为变压器是否含有变压器的参数，其中“1”为含有变压器，%“0”为不含有变压器。%B2为节点参数矩阵，其中第一列为节点注入发电功率参数；第二列为节点负荷功率参数；第三列为节点电压参数；第六列为节点类型参数，其中“1”为平衡节点，“2”为PQ节点，“3”为PV节点参数。%X为节点号和对地参数矩阵。其中第一列为节点编号，第二列为节点对地%参数。n=input('请输入节点数:n=');n1=input('请输入支路数:n1=');isb=input('请输入平衡节点号:isb=');pr=input('请输入误差精度:pr=');B1=input('请输入支路参数:B1=');B2=input('请输入节点参数:B2=');X=input('节点号和对地参数:X=');Y=zeros(n);Times=1;%置迭代次数为初始值%创建节点导纳矩阵fori=1:n1ifB1(i,6)==0%不含变压器的支路p=B1(i,1);q=B1(i,2);Y(p,q)=Y(p,q)-1/B1(i,3);Y(q,p)=Y(p,q);Y(p,p)=Y(p,p)+1/B1(i,3)+0.5*B1(i,4);Y(q,q)=Y(q,q)+1/B1(i,3)+0.5*B1(i,4);else%含有变压器的支路p=B1(i,1);q=B1(i,2);Y(p,q)=Y(p,q)-1/(B1(i,3)*B1(i,5));Y(q,p)=Y(p,q);Y(p,p)=Y(p,p)+1/B1(i,3);Y(q,q)=Y(q,q)+1/(B1(i,5)^2*B1(i,3));endendYOrgS=zeros(2*n-2,1);DetaS=zeros(2*n-2,1);%将OrgS、DetaS初始化%创建OrgS，用于存储初始功率参数h=0;j=0;fori=1:n%对PQ节点的处理ifi~=isb&B2(i,6)==2h=h+1;forj=1:nOrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))+imag(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))-real(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));endendendfori=1:n%对PV节点的处理，注意这时不可再将h初始化为0ifi~=isb&B2(i,6)==3h=h+1;forj=1:nOrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))+imag(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))-real(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));endendendOrgS%创建PVU用于存储PV节点的初始电压PVU=zeros(n-h-1,1);t=0;fori=1:nifB2(i,6)==3t=t+1;PVU(t,1)=B2(i,3);endendPVU%创建DetaS，用于存储有功功率、无功功率和电压幅值的不平衡量h=0;fori=1:n%对PQ节点的处理ifi~=isb&B2(i,6)==2h=h+1;DetaS(2*h-1,1)=real(B2(i,2))-OrgS(2*h-1,1);DetaS(2*h,1)=imag(B2(i,2))-OrgS(2*h,1);endendt=0;fori=1:n%对PV节点的处理，注意这时不可再将h初始化为0ifi~=isb&B2(i,6)==3h=h+1;t=t+1;DetaS(2*h-1,1)=real(B2(i,2))-OrgS(2*h-1,1);DetaS(2*h,1)=real(PVU(t,1))^2+imag(PVU(t,1))^2-real(B2(i,3))^2-imag(B2(i,3))^2;endendDetaS%创建I，用于存储节点电流参数i=zeros(n-1,1);h=0;fori=1:nifi~=isbh=h+1;I(h,1)=(OrgS(2*h-1,1)-OrgS(2*h,1)*sqrt(-1))/conj(B2(i,3));endendI%创建Jacbi(雅可比矩阵)Jacbi=zeros(2*n-2);h=0;k=0;fori=1:n%对PQ节点的处理ifB2(i,6)==2h=h+1;forj=1:nifj~=isbk=k+1;ifi==j%对角元素的处理Jacbi(2*h-1,2*k-1)=-imag(Y(i,j))*real(B2(i,3))+real(Y(i,j))*imag(B2(i,3))+imag(I(h,1));Jacbi(2*h-1,2*k)=real(Y(i,j))*real(B2(i,3))+imag(Y(i,j))*imag(B2(i,3))+real(I(h,1));Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k)+2*real(I(h,1));Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1)-2*imag(I(h,1));else%非对角元素的处理Jacbi(2*h-1,2*k-1)=-imag(Y(i,j))*real(B2(i,3))+real(Y(i,j))*imag(B2(i,3));Jacbi(2*h-1,2*k)=real(Y(i,j))*real(B2(i,3))+imag(Y(i,j))*imag(B2(i,3));Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k);Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1);endifk==(n-1)%将用于内循环的指针置于初始值，以确保雅可比矩阵换行k=0;endendendendendk=0;fori=1:n%对PV节点的处理ifB2(i,6)==3h=h+1;forj=1:nifj~=isbk=k+1;ifi==j%对角元素的处理Jacbi(2*h-1,2*k-1)=-imag(Y(i,j))*real(B2(i,3))+real(Y(i,j))*imag(B2(i,3))+imag(I(h,1));Jacbi(2*h-1,2*k)=real(Y(i,j))*real(B2(i,3))+imag(Y(i,j))*imag(B2(i,3))+real(I(h,1));Jacbi(2*h,2*k-1)=2*imag(B2(i,3));Jacbi(2*h,2*k)=2*real(B2(i,3));else%非对角元素的处理Jacbi(2*h-1,2*k-1)=-imag(Y(i,j))*real(B2(i,3))+real(Y(i,j))*imag(B2(i,3));Jacbi(2*h-1,2*k)=real(Y(i,j))*real(B2(i,3))+imag(Y(i,j))*imag(B2(i,3));Jacbi(2*h,2*k-1)=0;Jacbi(2*h,2*k)=0;endifk==(n-1)%将用于内循环的指针置于初始值，以确保雅可比矩阵换行k=0;endendendendendJacbi%求解修正方程，获取节点电压的不平衡量DetaU=zeros(2*n-2,1);DetaU=inv(Jacbi)*DetaS;DetaU%修正节点电压j=0;fori=1:n%对PQ节点处理ifB2(i,6)==2j=j+1;B2(i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1);endendfori=1:n%对PV节点的处理ifB2(i,6)==3j=j+1;B2(i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1);endendB2%开始循环**********************************************************************whileabs(max(DetaU))prOrgS=zeros(2*n-2,1);%!!!初始功率参数在迭代过程中是不累加的，所以在这里必须将其初始化为零矩阵h=0;j=0;fori=1:nifi~=isb&B2(i,6)==2h=h+1;forj=1:nOrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))+imag(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))-real(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));endendendfori=1:nifi~=isb&B2(i,6)==3h=h+1;forj=1:nOrgS(2*h-1,1)=OrgS(2*h-1,1)+real(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))+imag(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));OrgS(2*h,1)=OrgS(2*h,1)+imag(B2(i,3))*(real(Y(i,j))*real(B2(j,3))-imag(Y(i,j))*imag(B2(j,3)))-real(B2(i,3))*(real(Y(i,j))*imag(B2(j,3))+imag(Y(i,j))*real(B2(j,3)));endendendOrgS%创建DetaSh=0;fori=1:nifi~=isb&B2(i,6)==2h=h+1;DetaS(2*h-1,1)=real(B2(i,2))-OrgS(2*h-1,1);DetaS(2*h,1)=imag(B2(i,2))-OrgS(2*h,1);endendt=0;fori=1:nifi~=isb&B2(i,6)==3h=h+1;t=t+1;DetaS(2*h-1,1)=real(B2(i,2))-OrgS(2*h-1,1);DetaS(2*h,1)=real(PVU(t,1)