电力系统分析潮流计算的计算机算法.doc

1、潮流计算的计算机算法实验报告姓名：学号：班级：一、实验目的掌握潮流计算的计算机算法。熟悉 MATLAB ，并掌握 MATLAB 程序的基本调试方法。二、实验准备根据课程内容，熟悉MATLAB 软件的使用方法，自行学习MATLAB 程序的基础语法，并根据所学知识编写潮流计算牛顿拉夫逊法(或 PQ 分解法 ) 的计算程序，用相应的算例在MATLAB 上进行计算、调试和验证。三、实验要求每人一组，在实验课时内，用MATLAB 调试和修改运行程序，用算例计算输出潮流结果。四、实验程序clear;%清空内存n=input(请输入节点数 :n=);n1=input(请输入支路数 :n1=);isb=inp

2、ut(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;%一：创建节点导纳矩阵for i=1:n1if B1(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,

3、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);endendY;%将 OrgS、DetaS初始化OrgS=zeros(2*n-2,1);DetaS=zeros(2*n-2,1);%二：创建 OrgS，用于存储初始功率参数h=0;j=0;for i=1:n%对 PQ 节点的处理if i=isb&B2(i,6)=2h=h+1;for j=1:nOrgS(2*h-1,1

4、)=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);ende

5、ndend%三：对 PV 节点的处理，注意这时不可再将h 初始化为 0for i=1:nif i=isb&B2(i,6)=3h=h+1;for j=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

6、(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;%四：创建 PVU 用于存储 PV 节点的初始电压PVU=zeros(n-h-1,1);t=0;for i=1:nif B2(i,6)=3t=t+1;PVU(t,1)=B2(i,3);endendPVU;%五：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;for i=1:n%对 PQ 节点的处理if i=isb&B2(i,6)=2h=h+1;DetaS(2*h-1,1)=r

7、eal(B2(i,2)-OrgS(2*h-1,1);DetaS(2*h,1)=imag(B2(i,2)-OrgS(2*h,1);endendt=0;for i=1:n%六：对 PV 节点的处理，注意这时不可再将h 初始化为 0if i=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;%七：创建 I ，用于存储节点电流参数i=zeros(n-1,1

8、);h=0;for i=1:nif i=isbh=h+1;I(h,1)=(OrgS(2*h-1,1)-OrgS(2*h,1)*sqrt(-1)/conj(B2(i,3);endendI;%八：创建 Jacbi(雅可比矩阵 )Jacbi=zeros(2*n-2);h=0;k=0;for i=1:n%对 PQ 节点的处理if B2(i,6)=2h=h+1;for j=1:nif j=isbk=k+1;if i=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);Jacb

9、i(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)+ima

10、g(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);endif k=(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;for i=1:n%对 PV 节点的处理if B2(i,6)=3h=h+1;for j=1:nif j=isbk=k+1;if i=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)+

11、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,

12、3);Jacbi(2*h,2*k-1)=0;Jacbi(2*h,2*k)=0;endif k=(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;%九：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;for i=1:n%对 PQ 节点处理if B2(i,6)=2j=j+1;B2(i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1);endendfor i=1:n%对 PV 节点的处

13、理if B2(i,6)=3j=j+1;B2(i,3)=B2(i,3)+DetaU(2*j,1)+DetaU(2*j-1,1)*sqrt(-1);endendB2;%十：开始循环*while abs(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;for i=1:nif i=isb&B2(i,6)=2h=h+1;for j=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

14、(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);endendendfor i=1:nif i=isb&B2(i,6)=3h=h+1;for j=1:nOrgS(2*h-1,1)=OrgS(2*h-1

15、,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

16、建 DetaSh=0;for i=1:nif i=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;for i=1:nif i=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

17、建 Ii=zeros(n-1,1);h=0;for i=1:nif i=isbh=h+1;I(h,1)=(OrgS(2*h-1,1)-OrgS(2*h,1)*sqrt(-1)/conj(B2(i,3);endendI;%创建 JacbiJacbi=zeros(2*n-2);h=0;k=0;for i=1:nif B2(i,6)=2h=h+1;for j=1:nif j=isbk=k+1;if i=jJacbi(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)=

18、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);elseJacbi(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);

19、Jacbi(2*h,2*k-1)=-Jacbi(2*h-1,2*k);Jacbi(2*h,2*k)=Jacbi(2*h-1,2*k-1);endif k=(n-1)k=0;endendendendendk=0;for i=1:nif B2(i,6)=3h=h+1;for j=1:nif j=isbk=k+1;if i=jJacbi(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);elseJacbi(2*h-1,2*k-1)=-imag(Y(i,j)*real(B2(i,3)+real(Y(i,j)*imag(