電力行業(yè)課程設(shè)計(jì)報(bào)告書電力系統(tǒng)穩(wěn)定計(jì)算

(電力行業(yè))課程設(shè)計(jì)報(bào)告3,300,10.5,0.85,350,10.5,2.0,0.23,1.7,4,15考慮。穩(wěn)定仿真中不考慮發(fā)電廠的調(diào)速器和原動機(jī)模型。負(fù)荷采用恒阻抗模型，3.考慮該電廠開機(jī)三臺，均為額定容量輸出的方式，用編制的程序計(jì)算潮流。析；試手工計(jì)算序網(wǎng)以及用網(wǎng)絡(luò)變換法求解轉(zhuǎn)移阻抗；要求輸出發(fā)電機(jī)功角，角速度。案進(jìn)行穩(wěn)定計(jì)算，給出搖擺曲線，并計(jì)算故障的極限切除時間。三、設(shè)計(jì)要求和設(shè)計(jì)成果：）；穩(wěn)定計(jì)算的功角曲線等；成績按五級制評分，將根據(jù)課程設(shè)計(jì)答辯情況給分。編程（大家也可選擇和對比其它函數(shù)，不同編號采用的數(shù)值積分算法不同）。[t,y]=ode45(odefun,[t1,tf],x0,options);說明：t1,tf:分別制定積分的時間起點(diǎn)和終點(diǎn)；：：詳細(xì)內(nèi)容查看幫助。例如，求解如下微分方程：2*sin(x(1)];x0=[1,0][t,y]=ode45(@myfunc,[0,3],x0,options)2.應(yīng)完成的項(xiàng)目：行分析；算結(jié)果的影響，并且分析勵磁調(diào)節(jié)系統(tǒng)參數(shù)變化對于穩(wěn)定計(jì)算結(jié)果的影響。3.參考資料以及說明求解功角與最大切除角。進(jìn)行暫態(tài)穩(wěn)定分析。L13,0.+j0.002545,j0.02821LL25,0.+j0.00509,j0.05641 為：參數(shù)信息如下表所示：編號,1,2,3,4,5,6,72.1.1網(wǎng)絡(luò)信息處理標(biāo)幺值參數(shù)整合成矩陣，使其包含線路的所有信息，再形成節(jié)點(diǎn)導(dǎo)納矩陣。節(jié)點(diǎn)編號,實(shí)際電壓標(biāo)幺值,相角(°),注入功率標(biāo)幺值2,1.02489,-1.2154,-2-j1.13,1.04085,-0.17,-3.8-j1.44,1.019,-1.683,-2.4-j1.35,1.02532,-0.9514,-3-j1.56,1.03703,-0.5589,-1.9-j0.87,1.05,1.573,7.53+j1.585首端節(jié)點(diǎn)編號,末端節(jié)點(diǎn)編號,首端有功功率標(biāo)幺值,首端無功功率標(biāo)幺值,有功損耗標(biāo)幺值,無功損耗標(biāo)幺值1,6,4.1051,2.3359,0.010282,4,1.1244,0.5253,0.,-0.01172,5,-0.9372,0.0512,0.000752,-0.0552,6,-2.1872,-1.5978,0.00767,-0.031223,4,1.2863,0.6941,0.00856,-0.022243,7,-3.5395,-0.3815,0.01952,-0.004335,7,-3.938,-1.29,0.03605,0.05385具很容易地進(jìn)行修改，用戶只需輕輕點(diǎn)擊幾下鼠標(biāo)就可以在檢修期間切換線路、根據(jù)題意搭建好的潮流模型如圖所示：圖2.2.1潮流模型至此潮流計(jì)算模型搭建完畢。進(jìn)行潮流計(jì)算。模型網(wǎng)絡(luò)潮流流向如圖所示：圖2.3.1潮流流向圖2.3.3發(fā)電機(jī)運(yùn)行狀態(tài)4,1.01790,1.019,-1.675,1.02422,1.02532,-0.94,-6,1.03669,1.03703,-0.56,都極小，一致性很強(qiáng)。說明兩種方法都是可行的。表2.3.2各支路功率與損耗對比支路區(qū)間,首端有功,首端無功,有功損耗,無功損耗1，3,155,154.89,171,158.45,0.22,0.202,-1.82,-1.911，6,410.6,410.51,250,233.59,1.06,1.028,2.64,2.432，6,-218.8,-218.72,-170.4,-159.78,0.8,0.767,-2.9,-3.122，5,-93.6,-93.72,6.8,5.12,0.08,0.075,-5.48,-5.52，4,112.4,112.44,53.5,52.53,0.22,0.214,-1.15,-1.173，4,128.7,128.63,73.2,69.41,0.88,0.856,-2.08,-2.223，7,-334,-353.95,-40.4,-38.15,1.96,1.952,-0.42,-0.435，7,-393.8,-393.8,-137.8,-129,3.66,3.605,5.7,5.39強(qiáng)的一致性。說明兩種運(yùn)算方式都是正確可行的。3.1.1發(fā)電機(jī)的處理'參數(shù)相等。3.1.2變壓器的處理3.1.3負(fù)荷的處理節(jié)點(diǎn)編號,節(jié)點(diǎn)電壓,負(fù)荷大小,等效電阻,等效電抗,負(fù)序阻抗3,228.987,380+j140,0.251024,j0.092483,j0.354,224.18,240+j130,0.334506,j0.18116,228.1466,190+j80,0.480781,j0.203.2采用網(wǎng)絡(luò)變換法的具體步驟3.2.1單回路三相短路3.2.1.1穩(wěn)態(tài)運(yùn)行先將這些并聯(lián)電容消去。3.2.1.2短路后三相短路后相當(dāng)于接一根接地線，如下圖所示：3.2.1.3切除故障3.2.2單回路單相短路3.2.2.1短路后單相短路后相當(dāng)于在短路點(diǎn)通過一個等效阻抗接地Δ(2)(0)(2)為負(fù)序阻抗，X(0)為零序阻抗。3.2.2切除故障4.1.1求解有功功率傳輸特性J''∠89.47'2)計(jì)算程序function[x]=f1(w0,tc)[t1,x1]=ode45('temp',[0,tc],x0,options,a,b,c);x02=x1(end,:);[t2,x2]=ode45('temp',[tc,30],x02,options,a,b,c);t=[t1;t2];x=[x1;x2];plot(t,x(:,1),'r-',t,x(:,2),'b-')functiondx=temp(t,x,flag,a,b,c)dx=[(x(2)-1)*100*pi;1/158.8*((7.533-a-b*sin(x(1)-c))/x(2)-10*(x(2)-1))];運(yùn)行程序后得搖擺曲線如下，功角逐漸穩(wěn)定，可知發(fā)電機(jī)暫態(tài)穩(wěn)定。J''∠89.47''計(jì)算代碼如下：function[x]=f2(w0,tc)x0=[17.5*pi/180;w0];[t1,x1]=ode45('temp',[0,tc],x0,options,a,b,c);x02=x1(end,:)';[t2,x2]=ode45('temp',[tc,0.9],x02,options,a,b,c);x03=x2(end,:)';[t3,x3]=ode45('temp',[0.9,1.1],x03,options,a,b,c);x04=x3(end,:)';[t4,x4]=ode45('temp',[1.1,30],x04,options,a,b,c);t=[t1;t2;t3;t4];x=[x1;x2;x3;x4];plot(t,x(:,1),'r-',t,x(:,2),'b-')運(yùn)行程序后得搖擺曲線如下，功角逐漸穩(wěn)定，可知發(fā)電機(jī)暫態(tài)穩(wěn)定。4.2.1短路參數(shù)計(jì)算及標(biāo)幺化4.2.2對線路及發(fā)電機(jī)進(jìn)行短路參數(shù)設(shè)置線路零序參數(shù)設(shè)置如圖：圖4.2.1線路短路參數(shù)設(shè)置圖4.2.2平衡節(jié)點(diǎn)發(fā)電機(jī)參數(shù)設(shè)置圖4.2.3發(fā)電機(jī)參數(shù)設(shè)置圖4.2.3.1發(fā)電機(jī)勵磁參數(shù)設(shè)置。搖擺曲線如圖：圖4.2.4搖擺曲線此時系統(tǒng)失去穩(wěn)定。此時系統(tǒng)仍然暫態(tài)穩(wěn)定。統(tǒng)將失去穩(wěn)定。故障設(shè)置如圖所示：圖4.2.7短路故障設(shè)置得出搖擺曲線如圖：圖4.2.7搖擺曲線圖4.2.4.1發(fā)電機(jī)參數(shù)設(shè)置圖4.2.4.2發(fā)電機(jī)勵磁參數(shù)設(shè)置圖4.2.4.3搖擺曲線故障設(shè)置如圖所示：圖4.2.4.4短路故障設(shè)置圖4.2.4.5搖擺曲線5.發(fā)電機(jī)模型及勵磁調(diào)節(jié)參數(shù)對穩(wěn)定計(jì)算結(jié)果的影響5.2TJ對穩(wěn)定計(jì)算結(jié)果的影響少發(fā)電機(jī)受到擾動后轉(zhuǎn)子相對動能的變化量，即有表5.2.1TJ,15,20,25,30,35tc,1.484,1.584,1.694,1.814,1.908勵磁環(huán)節(jié)如圖所示：節(jié)5.3.1定性分析