1、0.8561.14672.7452.965283.7434.251892.2372.7563104.144.6963111.3281.76311122.4362.8664133.5213.966表2 系统负荷参数节点编号节点类型节点初始电压(kV)Pi(MVA)Qi(MVA)1根节点10.42中间节点10.00.03420.030130.06930.064240.08450.07635叶节点0.02950.026160.04740.040970.11760.095780.09460.085790.09160.0859100.02710.0229110.06960.0643120.06760.0
2、579130.02980.0242主程序清单:PQ,FT,RX=case114(); %调用数据文件NN=size(PQ,1); %节点数NB=size(FT,1); %支路数数V=PQ(:,1); %V初始电压相量maxd=1k=1while maxd0.0001 PQ2=PQ; %每一次迭代各节点的注入有功和无功相同 PL=0.0;for i=1:NB kf=FT(i,1); %前推始节点号 kt=FT(i,2); %前推终节点号 x=(PQ2(kf,2)2+PQ2(kf,3)2)/V(kf)/V(kf); %计算沿线电流平方A PQ1(i,1)=PQ2(kf,2)+RX(i,1)*x;
3、%计算支路首端有功/MW RX(i,1)R PQ1(i,2)=PQ2(kf,3)+RX(i,2)*x; %计算沿支路的无功损耗/Mvar RX(i,2)X PQ2(kt,2)= PQ2(kt,2)+PQ1(i,1); %用PQ1去修正支路末端节点的有功P 单位MW PQ2(kt,3)= PQ2(kt,3)+PQ1(i,2); %用PQ1去修正支路末端节点的有功Q 单位Mvar PL=PL+RX(i,1)*x;endangle(1)=0.0;for i=NB:-1: kf=FT(i,2); %回代始节点号 kt=FT(i,1); %回代终节点号 dv1=(PQ1(i,1)*RX(i,1)+PQ1
4、(i,2)*RX(i,2)/V(kf); %计算支路电压损耗的纵分量dv1 dv2=(PQ1(i,1)*RX(i,2)-PQ1(i,2)*RX(i,1)/V(kf); %计算支路电压损耗的横分量dv2 V2(kt)=sqrt(V(kf)-dv1)2+dv22); %计算支路末端电压/kV angle(kt)=angle(kf)+atand(dv2/(V(kf)-dv1); %计算支路maxd=abs(V2(2)-V(2);V2(1)=V(1);for i=3:1:NN if abs(V2(i)-V(i)maxd; maxd=abs(V2(i)-V(i); end maxdk=k+1PQ1 %潮
5、流分布 即支路首端潮流MVAV=V2 %节点电压模计算结果kVangle %节点电压角度计算结果单位度PL %网损单位MWclear输入文件清单:function PQ,FT,RX=case114()PQ=%节点电压 有功 无功10.4 0 010.0 0.0342 0.030110.0 0.0693 0.064210.0 0.0845 0.076310.0 0.0295 0.026110.0 0.0474 0.040910.0 0.1176 0.095710.0 0.0946 0.085710.0 0.0916 0.085910.0 0.0271 0.022910.0 0.0696 0.06
6、4310.0 0.0676 0.057910.0 0.0298 0.0242;FT=%首端 末端 5 413 44 310 312 1111 37 66 29 88 23 22 1RX=% R X 4.524 5.043.521 3.9661.145 1.284.14 4.6962.436 2.8661.328 1.7632.745 2.9650.856 1.142.237 2.7563.743 4.2512.356 2.5413.367 3.685计算过程maxd = 1k = 0.1780 2PQ1 = 0.0296 0.0262 0.0299 0.0243 0.1443 0.1272 0
7、.0272 0.0230 0.0678 0.0581 0.1378 0.1230 0.1182 0.0964 0.1660 0.1378 0.0920 0.0863 0.1890 0.1748 0.3847 0.3439 0.8099 0.7260V = Columns 1 through 8 10.4000 9.8807 9.8220 9.9672 9.9734 9.9701 9.9390 9.8550 Columns 9 through 13 9.9556 9.9780 9.9600 9.9668 9.9799angle = 0 0.3011 0.3986 0.4211 0.4387 0.
8、3421 0.3916 0.3878 0.4225 0.4173 0.4444 0.4747 0.4400PL = 0.0471 0.1787 3 0.1890 0.1749 0.3849 0.3442 0.8112 0.7274 10.4000 9.8798 9.7004 9.7886 9.9405 9.8504 9.9089 9.7338 9.8100 9.7996 9.7813 9.9267 9.9470 0 0.3011 0.4011 0.4244 0.4421 0.3431 0.3929 0.3899 0.4257 0.4204 0.4486 0.4791 0.4434 0.0484
9、 0.1793 4 0.1444 0.1272 0.1379 0.1231 0.1661 0.1378 0.0920 0.0864 0.1891 0.1749 0.3851 0.3444 0.8115 0.7277 10.4000 9.8796 9.6994 9.6666 9.7614 9.8495 9.7884 9.7329 9.6883 9.6777 9.6591 9.7474 9.7680 0 0.3011 0.4011 0.4250 0.4433 0.3431 0.3942 0.3899 0.4266 0.4209 0.4498 0.4814 0.4447 0.0487 0.1226 5 0.1183 0.0964 0.1661 0.1379 0.1891 0.1750 0.3852 0.3444 0.8115 0.7278 10.4000 9.8795 9.6991 9.6656 9.6391 9.8493 9.7875 9.7326 9.6873 9.6767 9.6581 9.6248 9.6457 0 0.3011 0.4011 0.4250 0.4438 0.3431 0.3942 0.3899 0.4266 0.4209 0.4498 0.4822 0.4452 0.0010 6 0.1444 0.1273
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