电力系统潮流计算代码

附录

程序的主要代码：

n=input('请输入节点数n=');

na=input('请输入支路数na=');

isb=input('请输入平衡节点母线号isb=');

jd=input('请输入误差精度jd=');

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=');

L=input('请输入由节点号及其对地阻抗形成的矩阵L='); nb=input('请输入P-Q节点数nb=');

Y=zeros(n);Z=zeros(n);e=zeros(1,n);f=zeros(1,n);V=zeros(1,n); O=zeros(1,n);

for i=1:na

if B1(i,6)==0

a=B1(i,1);b=B1(i,2);

else a=B1(i,2);b=B1(i,1);

end

Y(a,b)=Y(a,b)-1./(B1(i,3)*B1(i,5));

Z(a,b)=Z(a,b)-1./(B1(i,3));

Y(b,a)=Y(a,b);

Z(b,a)=Z(a,b);

Y(b,b)=Y(b,b)+1./(B1(i,3)*B1(i,5)^2)+B1(i,4)./2;

Z(b,b)=Z(b,b)+1./(B1(i,3));

Y(a,a)=Y(a,a)+1./(B1(i,3))+B1(i,4)./2;

Z(a,a)=Z(a,a)+1./(B1(i,3));

end

G=real(Y);B=imag(Z);CI=imag(Y);

for i=1:n

S(i)=B2(i,1)-B2(i,2);

CI(i,i)=CI(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

for i=2:n

if i==n

B(i,i)=1./B(i,i);

else

IT1=i+1;

for j1=IT1: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

a=0;b=0;

for i=1:n

if B2(i,6)==2

a=a+1;k=0;

for j1=1:n

if B2(j1,6)==2

k=k+1;

A(a,k)=CI(i,j1);

end

end

end

end

for i=1:nb

if i==na

A(i,i)=1./A(i,i);

else

k=i+1;

for j1=k:nb

A(i,j1)=A(i,j1)./A(i,i);

end

A(i,i)=1./A(i,i);

for k=i+1:nb

for j1=i+1:nb

A(k,j1)=A(k,j1)-A(k,i)*A(i,j1);

end

end

end

NT2=1;NT1=0;kp=1;kq=1;K=1;NCT=0;NT3=1;

while NT2~=0|NT3~=0

NT2=0;NT3=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))+CI(i,k)*sin(O(i)-O(k)));

end

CP1(i)=P(i)-V(i)*C(i);

CP(i)=CP1(i)./V(i);

NCT=abs(CP1(i));

if NCT>=jd

NT2=NT2+1;

end

end

end

Np(k)=NT2;

if NT2~=0

for i=2:n

CP(i)=B(i,i)*CP(i);

if i~=n

IT1=i+1;

for k=IT1:n

CP(k)=CP(k)-B(k,i)*CP(i);

end

else

for LZ=3:i

L=i+3-LZ;

NC4=L-1;

for MZ=2:NC4

I=NC4+2-MZ;

CP(I)=CP(I)-B(I,L)*CP(L);

end

end

end

end

for i=2:n

O(i)=O(i)-CP(i);

end

kq=1;L=0;

for i=1:n

if B2(i,6)==2