精品%本程序的功能是用PQ分解法进行潮流计算.doc

%本程序的功能是用P-Q分解法进行潮流计算 n=input(请输入节点数:n=); nl=input(请输入支路数:nl=); isb=input(请输入平衡母线节点号:isb=); pr=input(请输入误差精度:pr=); B1=input(请输入由支路参数形成的矩阵:B1=); B2=input(请输入由节点参数形成的矩阵:B2=); na=input(请输入PQ节点数na=); Y=zeros(n);YI=zeros(n);e=zeros(1,n);f=zeros(1,n);V=zeros(1,n);O=zeros(1,n); for i=1:nl if B1(i,6)==0 p=B1(i,1); q=B1(i,2); else p=B1(i,2); q=B1(i,1); end Y(p,q)=Y(p,q)-1./(B1(i,3)*B1(i,5)); YI(p,q)=YI(p,q)-1./B1(i,3); Y(q,p)=Y(p,q); YI(q,p)=YI(p,q); Y(q,q)=Y(q,q)+1./(B1(i,3)*B1(i,5)^2)+B1(i,4)./2; YI(q,q)=YI(q,q)+1./B1(i,3); Y(p,p)=Y(p,p)+1./B1(i,3)+B1(i,4)./2; YI(p,p)=YI(p,p)+1./B1(i,3); end %求导纳矩阵 G=real(Y);B=imag(YI);BI=imag(Y); for i=1:n S(i)=B2(i,1)-B2(i,2); BI(i,i)=BI(i,i)+B2(i,5); end P=real(S);Q=imag(S); for i=1:n e(i)=real(B2(i,3)); f(i)=imag(B2(i,3)); V(i)=B2(i,4); end for i=1:n if B2(i,6)==2 V(i)=sqrt(e(i)^2+f(i)^2); O(i)=atan(f(i)./e(i)); end end for i=2:n if i==n B(i,i)=1./B(i,i); else IC1=i+1; for j1=IC1:n B(i,j1)=B(i,j1)./B(i,i); end B(i,i)=1./B(i,i); for k=i+1:n for j1=i+1:n B(k,j1)=B(k,j1)-B(k,i)*B(i,j1); end end end end p=0;q=0; for i=1:n if B2(i,6)==2 p=p+1;k=0; for j1=1:n if B2(j1,6)==2 k=k+1; A(p,k)=BI(i,j1); end end end end for i=1:na if i==na A(i,i)=1./A(i,i); else k=i+1; for j1=k:na A(i,j1)=A(i,j1)./A(i,i); end A(i,i)=1./A(i,i); for k=i+1:na for j1=i+1:na A(k,j1)=A(k,j1)-A(k,i)*A(i,j1); end end end end ICT2=1;ICT1=0;kp=1;kq=1;K=1;DET=0;ICT3=1; while ICT2~=0|ICT3~=0 ICT2=0;ICT3=0; for i=1:n if i~=isb C(i)=0; for k=1:n C(i)=C(i)+V(k)*(G(i,k)*cos(O(i)-O(k))+BI(i,k)*sin(O(i)-O(k))); end DP1(i)=P(i)-V(i)*C(i); DP(i)=DP1(i)./V(i); DET=abs(DP