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1、>>%本程序的功能是用牛頓——拉夫遜法進(jìn)行潮流計(jì)算%B1矩陣：1、支路首端號(hào)；2、末端號(hào)；3、支路阻抗；4、支路對(duì)地電納%5、支路的變比；6、支路首端處于K側(cè)為1，1側(cè)為0%B2矩陣：1、該節(jié)點(diǎn)發(fā)電機(jī)功率；2、該節(jié)點(diǎn)負(fù)荷功率；3、節(jié)點(diǎn)電壓初始值%4、PV節(jié)點(diǎn)電壓V的給定值；5、節(jié)點(diǎn)所接的無(wú)功補(bǔ)償設(shè)備的容量%6、節(jié)點(diǎn)分類(lèi)標(biāo)號(hào)：1為平衡節(jié)點(diǎn)（應(yīng)為1號(hào)節(jié)點(diǎn)）；2為PQ節(jié)點(diǎn)；%3為PV節(jié)點(diǎn)；clear;n=10;%input('請(qǐng)輸入節(jié)點(diǎn)數(shù)：n=');nl=10;%input('請(qǐng)輸入支路數(shù)：nl=');isb=1;%input('請(qǐng)輸入平衡母線節(jié)點(diǎn)號(hào)：isb=')
2、;pr=0.00001;%input('請(qǐng)輸入誤差精度：pr=');B1=[120.03512+0.08306i0.13455i10;230.0068+0.18375i01.023811;140.05620+0.13289i0.05382i10;450.00811+0.24549i01.023811;160.05620+0.13289i0.05382i10;460.04215+0.09967i0.04037i10;670.0068+0.18375i01.023811;680.02810+0.06645i0.10764i10;8100.00811+0.2454
3、9i011;890.03512+0.08306i0.13455i10]B2=[001.11.101;001002;00.343+0.21256i1002;001002;00.204+0.12638i1002;001002;00.306+0.18962i1002;001002;0.501.11.103;00.343+0.21256i1002];%input('請(qǐng)輸入各節(jié)點(diǎn)參數(shù)形成的矩陣：B2=');Y=zeros(n);e=zeros(1,n);f=zeros(1,n);V=zeros(1,n);sida=zeros(1,n);S1=zeros(nl);%%%
4、---------------------------------------------------fori=1:nl%支路數(shù)ifB1(i,6)==0%左節(jié)點(diǎn)處于1側(cè)p=B1(i,1);q=B1(i,2);else%左節(jié)點(diǎn)處于K側(cè)p=B1(i,2);q=B1(i,1);endY(p,q)=Y(p,q)-1./(B1(i,3)*B1(i,5));%非對(duì)角元Y(q,p)=Y(p,q);%非對(duì)角元Y(q,q)=Y(q,q)+1./(B1(i,3)*B1(i,5)^2)+B1(i,4)./2;%對(duì)角元K側(cè)Y(p,p)=Y(p,p)+1./B1(i,3)+B1(i,
5、4)./2;%對(duì)角元1側(cè)end%求導(dǎo)納矩陣disp('導(dǎo)納矩陣Y=');disp(Y)%----------------------------------------------------------G=real(Y);B=imag(Y);%分解出導(dǎo)納陣的實(shí)部和虛部fori=1:n%給定各節(jié)點(diǎn)初始電壓的實(shí)部和虛部e(i)=real(B2(i,3));f(i)=imag(B2(i,3));V(i)=B2(i,4);%PV節(jié)點(diǎn)電壓給定模值endfori=1:n%給定各節(jié)點(diǎn)注入功率S(i)=B2(i,1)-B2(i,2);%i節(jié)點(diǎn)注入功率SG-SLB(i,i)
6、=B(i,i)+B2(i,5);%i節(jié)點(diǎn)無(wú)功補(bǔ)償量end%===================================================================P=real(S);Q=imag(S);%分解出各節(jié)點(diǎn)注入的有功和無(wú)功功率ICT1=0;IT2=1;N0=2*n;N=N0+1;a=0;%迭代次數(shù)ICT1、a；不滿足收斂要求的節(jié)點(diǎn)數(shù)IT2whileIT2~=0%N0=2*n雅可比矩陣的階數(shù)；N=N0+1擴(kuò)展列IT2=0;a=a+1;fori=1:nifi~=isb%非平衡節(jié)點(diǎn)C(i)=0;D(i)=0;forj1=1:
7、nC(i)=C(i)+G(i,j1)*e(j1)-B(i,j1)*f(j1);%Σ(Gij*ej-Bij*fj)D(i)=D(i)+G(i,j1)*f(j1)+B(i,j1)*e(j1);%Σ(Gij*fj+Bij*ej)endP1=C(i)*e(i)+f(i)*D(i);%節(jié)點(diǎn)功率P計(jì)算eiΣ(Gij*ej-Bij*fj)+fiΣ(Gij*fj+Bij*ej)Q1=C(i)*f(i)-e(i)*D(i);%節(jié)點(diǎn)功率Q計(jì)算fiΣ(Gij*ej-Bij*fj)-eiΣ(Gij*fj+Bij*ej)%求i節(jié)點(diǎn)有功和無(wú)功功率P',Q'的計(jì)算值V2=e(i)^2+f
8、(i)^2;%電壓模平方%=========以下針對(duì)
