電力系統(tǒng)分析理論課本習(xí)題matlab做(編輯修改稿)
2025-04-21 06:07 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 +002 ++003ids0 =+002 ++003il =100v =110qb2 =s1 = +rt = dpl =T =8760t =3150dwt =+006dwl =+006dw =+006 %例題52z1=+*iv1=35va=36vb=10Smax=8+5*iSmin=4+3*izt=+*i%變壓器阻抗與線路阻抗合并得等值阻抗z=z1+zt%線路首端輸送功率為Samax=Smax+(abs(Smax)/v1)^2*zSamin=Smin+(abs(Smin)/v1)^2*z%B點(diǎn)折算到高壓側(cè)電壓為V1bmax=va(real(Samax)*real(z)+imag(Samax)*imag(z))/vaV1bmin=va(real(Samin)*real(z)+imag(Samin)*imag(z))/va%最大和最小負(fù)荷時(shí)對(duì)應(yīng)的分接頭電壓Vbmax=*vbVbmin=*vbV2n=Vtmax=V1bmax*V2n/VbmaxVtmin=V1bmin*V2n/Vbmin%取平均值Vt=(Vtmax+Vtmin)/2%選擇變壓器最接近的分接頭a=(Vt/v11)*100%%%的分接頭，即Vt1=()*v1%按所選分接頭校驗(yàn)10KV母線的實(shí)際電壓Vbmax1=V1bmax*V2n/Vt1dvmax=(Vbmax110)/10Vbmin1=V1bmin*V2n/Vt1dvmax=(Vbmin110)/10z1 = +v1 =35va =36vb =10Smax = + Smin = + zt = + z = +Samax = + Samin = + V1bmax =V1bmin =Vbmax =Vbmin =V2n =Vtmax =Vtmin =Vt =a =Vt1 =Vbmax1 =dvmax =Vbmin1 =dvmax = %例題53Smax=25+18iSmin=14+10iZt=3+30iV1max=120V1min=114Pmax=real(Smax)Qmax=imag(Smax)Pmin=real(Smin)Qmin=imag(Smin)R=real(Zt)X=imag(Zt)%最大負(fù)荷時(shí)變壓器的電壓降為dVmax=(Pmax*R+Qmax*X)/V1max%規(guī)算至高電壓側(cè)的低電壓為V2max=V1max+dVmax%最小負(fù)荷時(shí)變壓器的電壓降為dVmin=(Pmin*R+Qmin*X)/V1min%規(guī)算至高電壓側(cè)的低電壓為V2min=V1min+dVmin%，最小負(fù)荷時(shí)電壓為6kvV1tmax=V2max*V1tmin=V2min*V1t=(V1tmax+V1tmin)/2%選擇最近的分接頭121kv%校驗(yàn)：最大負(fù)荷時(shí)發(fā)電機(jī)端實(shí)際電壓為V2max*%最大負(fù)荷時(shí)發(fā)電機(jī)端實(shí)際電壓為V2min*Smax = +Smin = +Zt = +V1max =120V1min =114Pmax =25Qmax =18Pmin =14Qmin =10R =3X =30dVmax =V2max =dVmin =3V2min =117V1tmax =V1tmin =V1t =ans =ans = %例題54V1n=110V2n=35V3n=6Vn3=P1=Q1=R1=X1=65P2=Q2=R2=X2=P3=Q3=R3=X3=V1max=112V1min=115%（1）求最大、最小負(fù)荷時(shí)各繞組的電壓損耗dV1max=(P1*R1+Q1*X1)/V1max %最大負(fù)荷時(shí)dV2max=(P2*R2+Q2*X2)/(V1maxdV1max)dV3max=(P3*R3+Q3*X3)/(V1maxdV1max)dV1min=(*P1*R1+*Q1*X1)/V1min %最小負(fù)荷時(shí) dV2min=(*P2*R2+*Q2*X2)/(V1mindV1min)dV3min=(*P3*R3+*Q3*X3)/(V1mindV1min)%（2）求最大、最小負(fù)荷時(shí)個(gè)母線電壓V1max=112 %最大負(fù)荷時(shí)V2max1=V1maxdV1maxdV2maxV3max1=V1maxdV1maxdV3maxV1min=115 %最小負(fù)荷時(shí)V2min1=V1mindV1mindV2minV3min1=V1mindV1mindV3min%（3)選擇高壓繞組分接頭V3max=V3n*(1+0)V3min=V3n*(1+)Vt1max=V3max1*Vn3/V3maxVt1min=V3min1*Vn3/V3min Vt1=(Vt1max+Vt1min)/2Vt1= %選用110+5%的分接頭%（4）校驗(yàn)低壓母線電壓V3max=V3max1*Vn3/Vt1 %最大負(fù)荷時(shí)V3min=V3min1*Vn3/Vt1 %最小負(fù)荷時(shí)%低壓母線電壓偏移dV3max=(V3maxV3n)/V3n %最大負(fù)荷時(shí)dV3min=(V3minV3n)/V3n %最小負(fù)荷時(shí)%（5）根據(jù)中壓母線的調(diào)壓要求，又高、中壓倆側(cè)，選擇中壓繞組的分接頭%最大、最小負(fù)荷時(shí)中壓母線調(diào)壓要求電壓為V2max=V2n*(1+0)V2min=V2n*(1+)%最大、最小負(fù)荷時(shí)中壓繞組的分接頭電壓為Vt2max=V2max*Vt1/V2max1Vt2min=V2min*Vt1/V2min1Vt2=(Vt2max+Vt2min)/2%Vt2=%（6）校驗(yàn)中壓側(cè)母線電壓V2max=V2max1*Vt2/Vt1 %最大負(fù)荷時(shí)V2min=V2min1*Vt2/Vt1 %最小負(fù)荷時(shí)%中壓母線電壓偏移：dV2max=(V2maxV2n)/V2ndV2min=(V2minV2n)/V2nV1n =110V2n =35V3n =6Vn3 =P1 =Q1 =R1
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