B题投票

lijingjuna

< 0cm 0cm 0pt">四<FONT face="Times New Roman"> </FONT>模型的建立及求解<p></p></P>< 0cm 0cm 0pt">（一） 确定各线路上有功潮流关于各发电机组出力的近似函数表达式<p></p></P>< 0cm 0cm 0pt"><FONT face="Times New Roman">   </FONT>在这里，由于<FONT face="Times New Roman">8</FONT>台发电机组同时向<FONT face="Times New Roman">6</FONT>条主要线路供电，可以看成是一个多元回归问题。我们要考察<FONT face="Times New Roman">8</FONT>个自变量<FONT face="Times New Roman">X1,X2,…,X8</FONT>与<FONT face="Times New Roman">6</FONT>个因变量<FONT face="Times New Roman">Y1,Y2,…,Y6</FONT>之间的相关关系。由于各个线路上所得的潮流就是<FONT face="Times New Roman">8</FONT>台发电机组出力的相互叠加，因此我们把二者的关系看成线性回归关系。则设<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y1=k01+k11X1+k12X2+k13X3+k14X4+k15X5+k16X6+k17X7+k18X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y2=k02+k21X1+k22X2+k23X3+k24X4+k25X5+k26X6+k27X7+k28X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y3=k03+k31X1+k32X2+k33X3+k34X4+k35X5+k36X6+k37X7+k38X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y4=k04+k41X1+k42X2+k43X3+k44X4+k45X5+k46X6+k47X7+k48X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y5=k05+k51X1+k52X2+k53X3+k54X4+k55X5+k56X6+k57X7+k58X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">Y6=k06+k61X1+k62X2+k63X3+k64X4+k65X5+k66X6+k67X7+k68X8<p></p></P><P 0cm 0cm 0pt">由表1、表<FONT face="Times New Roman">2</FONT>的<FONT face="Times New Roman">32</FONT>组观测数据可解出近似表达式为<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y1=110.2965+0.0828X1+0.0483X2+0.0530X3+0.1199X4-0.0254X5+0.1220X6+0.1216X7-0.0012X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y2=131.2289-0.0546X1+0.1279X2-0.0000X3+0.0333X4+0.0868X5-0.1124X6-0.0189X7+0.0987X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y3=-108.8732-0.0695X1+0.0616X2-0.1566X3-0.0099X4+0.1245X5+0.0021X6-0.0025X7-0.2014X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y4=77.4817-0.0345X1-0.1024X2+0.2052X3-0.0208X4-0.0118X5+0.0060X6+ 0.1449X7+0.0765X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y5=132.9745+0.0005X1+0.2433X2-0.0646X3-0.0411X4-0.0652X5+0.0703X6- 0.0043X7-0.0089X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0"><p> </p></P><P 0cm 0cm 0pt; TEXT-INDENT: 36pt; mso-char-indent-count: 3.0">                           3<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">Y6=120.6633+0.2378X1-0.0602X2-0.0779X3+0.0930X4+0.0469X5+0.0001X6+ 0.1659X7+0.0007X8<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">具体解题算法及程序设计详见附录。<p></p></P><P 0cm 0cm 0pt">对此表达式我们可以用方案0对应的数据进行初步检验，请见下表<p></p></P><P 0cm 0cm 0pt"><p> </p></P><P><TABLE auto auto auto 4.65pt; WIDTH: 412.8pt; BORDER-COLLAPSE: collapse; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt" cellSpacing=0 cellPadding=0 width=550 border=0><TR 14.25pt; mso-yfti-irow: 0"><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=72><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p> </p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-INDENT: 12pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 1.0" align=left>Y1 <p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>  Y2<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 64.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=86><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>  Y3<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-INDENT: 12pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 1.0" align=left>Y4 <p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>  Y5<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>  Y6<p></p></P></TD></TR><TR 14.25pt; mso-yfti-irow: 1"><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=72><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>方案0<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>164.78<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>140.87<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 64.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=86><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>-144.25<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>119.09<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>135.44<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>157.69<p></p></P></TD></TR><TR 14.25pt; mso-yfti-irow: 2"><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=72><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>表达式求得的值<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>164.7120<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>140.8238<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 64.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=86><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>-144.2051<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>119.0412<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>135.3803<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>157.6206<p></p></P></TD></TR><TR 14.25pt; mso-yfti-irow: 3; mso-yfti-lastrow: yes"><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=72><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>相对误差<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.041%<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.033%<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 64.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=86><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.031%<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.041%<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.044%<p></p></P></TD><TD #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 58.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" noWrap width=78><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>0.044%<p></p></P></TD></TR></TABLE></P><P 0cm 0cm 0pt"><p> </p></P>

lijingjuna

< 0cm 0cm 0pt">（四）对所得到的出力分配预案进行判断，看是否引起输电阻塞，并作出相应的调整，计算出阻塞费用<FONT face="Times New Roman">.<p></p></FONT></P>< 0cm 0cm 0pt"><FONT face="Times New Roman">     </FONT>在这个模型的建立中，我们引入一个临界值，以此来判断所给出的预报负荷有没有可以通过调整分配预案来消除输电阻塞的可能性。在这个问题中，我们的目标是求预报负荷在满足安全和爬坡速率的限制条件下，并且不发生输电阻塞时所能达到的最大值，也就是能否发生阻塞的一个临界值。如果我们预报给出的负荷大于这个临界值，那么无论你怎样调整分配方案，都不可能消除输电阻塞；如果预报的负荷值小于这个临界值，那么通过调整分配方案完全可以消除输电阻塞。基于以上我们求得的数据以及分析，我们可以列出下面的线性规划模型<FONT face="Times New Roman">:<p></p></FONT></P>< 0cm 0cm 0pt">目标函数是求满足要求的的负荷的最大值<FONT face="Times New Roman"> <p></p></FONT></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; mso-char-indent-count: 4.0"><FONT face="Times New Roman">Max</FONT><v:shapetype><FONT face="Times New Roman"> <v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><lock aspectratio="t" v:ext="edit"></lock></FONT></v:shapetype><v:shape><v:imagedata></v:imagedata></v:shape><FONT face="Times New Roman">  N=</FONT>X<SUB>1</SUB>+X<SUB>2</SUB>+X<SUB>3</SUB>+X<SUB>4</SUB>+X<SUB>5</SUB>+X<SUB>6</SUB>+X<SUB>7</SUB>+X<SUB>8</SUB><p></p></P><P 0cm 0cm 0pt">约束条件首先是个线路不发生输电阻塞：<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>110.2965+0.0828*x<SUB>1</SUB>+0.0483*x<SUB>2</SUB>+0.0530*x<SUB>3</SUB>+0.1199*x<SUB>4</SUB>-0.0254*x<SUB>5</SUB>+0.1220*x<SUB>6</SUB>+0.1216*x<SUB>7</SUB>-0.0012*x<SUB>8</SUB>&lt;=165;<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>131.0089-0.0546*x<SUB>1</SUB>+0.1297*x<SUB>2</SUB>+0.0333*x<SUB>4</SUB>+0.0868*x<SUB>5</SUB>-0.1124*x<SUB>6</SUB>-0.0189*x<SUB>7</SUB>+0.0987*x<SUB>8</SUB>&lt;=150;<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>-108.8732-0.0695*x<SUB>1</SUB>+0.0616*x<SUB>2</SUB>-0.1566*x<SUB>3</SUB>-0.0099*x<SUB>4</SUB>+0.1245*x<SUB>5</SUB>+0.0021*x<SUB>6</SUB>-0.0025*x<SUB>7</SUB>-0.2014*x<SUB>8</SUB>&gt;=-160;<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>77.4817-0.0345*x<SUB>1</SUB>-0.1024*x<SUB>2</SUB>+0.2052*x<SUB>3</SUB>-0.0208*x<SUB>4</SUB>-0.0118*x<SUB>5</SUB>+0.0060*x<SUB>6</SUB>+0.1449*x<SUB>7</SUB>+0.0765*x<SUB>8</SUB>&lt;=155;<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>132.9745+0.0005*x<SUB>1</SUB>+0.2433*x<SUB>2</SUB>-0.0646*x<SUB>3</SUB>-0.0411*x<SUB>4</SUB>-0.0652*x<SUB>5</SUB>+0.0703*x<SUB>6</SUB>-0.0043*x<SUB>7</SUB>-0.0089*x<SUB>8</SUB>&lt;=132;<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 48pt; TEXT-ALIGN: left; mso-char-indent-count: 4.0; mso-layout-grid-align: none" align=left>120.6633+0.2378*x<SUB>1</SUB>-0.0602*x<SUB>2</SUB>-0.0779*x<SUB>3</SUB>+0.0930*x<SUB>4</SUB>+0.0469*x<SUB>5</SUB>+0.0001*x<SUB>6</SUB>+0.1659*x<SUB>7</SUB>+0.0007*x<SUB>8</SUB>&lt;=162;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>    还要满足爬坡速率约束的各机组在下一时段可达到的出力范围，即：<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>1</SUB>&gt;97;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>2</SUB>&gt;58;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>3</SUB>&gt;132;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>4</SUB>&gt;60.5;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>5</SUB>&gt;108;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>6</SUB>&gt;125;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>7</SUB>&gt;60.1;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>8</SUB>&gt;63;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>1</SUB>&lt;153;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>2</SUB>&lt;88;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>3</SUB>&lt;228;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>4</SUB>&lt;99.5;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>5</SUB>&lt;152;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>6</SUB>&lt;155;<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align=left>x<SUB>7</SUB>&lt;102.1;<p></p></P><P 0cm 0cm 0pt">x<SUB>8</SUB>&lt;117;<p></p></P><P 0cm 0cm 0pt">    运用软件可迅速解得题目的最优解为<FONT face="Times New Roman">N=995.8907,</FONT>（具体程序见附录）。意即在考虑安全第一的情况下，当所预报的负荷小于<FONT face="Times New Roman">995.8907</FONT>时，完全可以通过调整各机组的分配方案来清除输电阻塞；当所预报的负荷大于<FONT face="Times New Roman">995.8907</FONT>时，无论在怎样调整分配方案，都不会清除输电阻塞，在这种情况下，我们就要考虑使用线路的安全裕度输电或者必须在用电侧拉闸限电<FONT face="Times New Roman">..<p></p></FONT></P>

lijingjuna

对于必须拉闸限电的情况同样可以利用上述方法求得一个界限点

wyaoy

<>没有常数项</P>

版主

<>应该没有常数项</P>

人同

同意第一问没有常数项

Mars000

如果各位有用SAS软件拟合的，那么有没有常数项就很清楚了，SAS会给出结果的[em01]

清算价

仁者见仁，智者见智

cctv110

同意第一问常数项0

数学王子

我也同意