20春学期《电力系统分析》在线平时作业3

adminhan

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">用功率和阻抗表示的电压降落纵分量的表达式为（&nbsp;&nbsp;&nbsp;&nbsp;）</span></p><p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><img width="321" height="79" alt="" src="http://file.open.com.cn/ItemDB/106726/7f373f83-d0a4-40f0-bf8f-5b522a00f9c6/20134315556967.jpg" /></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; FONT-WEIGHT: bold; mso-spacerun: 'yes'">A</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>B</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">C</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>D</span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 150%; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">理想的凸极同步发电机，<font face="Calibri">ABC</font><font face="宋体">坐标系下，定、转子绕组间的互感系数的变化周期为</font><font face="Calibri">(&nbsp;)</font></span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">常数</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"> </span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">&pi;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">2</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">&pi;</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"> </span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 150%; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">3</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">&pi;</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">用牛顿<font face="Times New Roman">-</font><font face="宋体">拉夫逊法进行潮流迭代计算，修正方程求解的是</font><font face="Times New Roman">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">线路功率</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"> </span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">节点注入功<span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">率</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"><o:p></o:p></span></span></p><p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><!--EndFragment--></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">节点电压新值</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"> </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"></span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">节点电压修正量</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p class="p0" style="line-height: 20pt; text-indent: -14.175pt; margin-top: 0pt; margin-bottom: 0pt; margin-left: 14.15pt;"><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>系</span><span style='font-family: "宋体"; font-size: 10.5pt; mso-spacerun: "yes";'>统发生两相短路接地故障时，复合序网的连接方式为</span><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>（　　　）</span><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'><o:p></o:p></span></p><!--EndFragment-->
A:<p class="p0" style="margin-top: 0pt; margin-bottom: 0pt;"><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>正序、负序、零序并联</span><span style='font-family: "宋体"; font-size: 10.5pt; mso-spacerun: "yes";'>&nbsp;</span></p><!--EndFragment-->
B:<p class="p0" style="line-height: 20pt; text-indent: -14.175pt; margin-top: 0pt; margin-bottom: 0pt; margin-left: 14.15pt;"><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>正序、负序并联，零序开路</span><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'><o:p></o:p></span></p><!--EndFragment-->
C:<p class="p0" style="margin-top: 0pt; margin-bottom: 0pt;"><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>正序、零序并联，负序开路</span></p><!--EndFragment-->
D:<p class="p0" style="line-height: 20pt; text-indent: -14.175pt; margin-top: 0pt; margin-bottom: 0pt; margin-left: 14.15pt;"><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'>零序、负序并联，正序开路</span><span style='font-family: "Calibri"; font-size: 10.5pt; mso-spacerun: "yes";'><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">线电压是相电压的（　　　）</span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">1倍&nbsp;&nbsp;&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">2倍&nbsp;&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><img width="35" height="44" alt="" src="http://file.open.com.cn/ItemDB/106726/2b371e3f-c73e-4d10-bfca-acd35b9cb815/201762611131283.jpg" />倍</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">3<font face="宋体">倍</font></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">电力系统中一级负荷、二级负荷和三级负荷的划分依据是用户对供电的（&nbsp;&nbsp;）</span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">可靠性要求</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 10.5pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">经济性要求</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">灵活性要求</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"> </span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 10.5pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">优质性要求</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">系统发生短路故障后，越靠近短路点，正序电压（　　　）</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">越低</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">越高</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">不变</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">无穷大</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; TEXT-INDENT: -14.175pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 14.15pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">应用小干扰法分析系统静态稳定，计及阻尼系数作用时，系统稳定的条件是（　　　）</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">D&lt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">　</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">S</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">E</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">q</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&gt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">D&lt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">　</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">S</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">Eq</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&lt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">D&gt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">　</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">S</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">Eq</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&lt;0</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; TEXT-INDENT: -14.175pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 14.15pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">D&gt;0</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">　</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">S</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; FONT-WEIGHT: normal; mso-spacerun: 'yes'">E</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; FONT-WEIGHT: normal; mso-spacerun: 'yes'">q</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">&gt;0</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">等面积定则中所涉及的减速面积表示<font face="Calibri">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">转子动能的增加量</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">转子动能的减少量</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">转子动能维持一个不变的量</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">定子动能的减少量</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">110</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">kV</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">系统的平均额定电压为（　　　）</span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">113</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">kV</span></p><!--EndFragment-->
B:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; TEXT-INDENT: -15.75pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 15.75pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">115</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">kV</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">121</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">kV</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; TEXT-INDENT: -15.75pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 15.75pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">120</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">kV</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">有功功率流过电抗时<font face="Calibri">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">会产生有功损耗</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">既不会产生有功损耗，也不会产生无功损耗</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">会产生无功损耗</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">不会产生无功损耗</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">同步发电机突然发生三相短路瞬间，定子绕组将有直流电流，计及电阻，此直流分量的衰减时间常数为（　　　）</span></p><p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><img width="353" height="76" alt="" src="http://file.open.com.cn/ItemDB/106726/d55f3e44-cbe7-4716-b706-cd2391eec4d1/201343224013402.jpg" /></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>A</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>B</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">C</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>D</span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">某元件导纳的有名值为<font face="Calibri">Y=G+jB</font><font face="宋体">，当基准值功率为</font><font face="Calibri">S</font></span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">B</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">，电压为</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">U</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">B</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">，则电导的标么值为<font face="Calibri">(&nbsp;)</font></span></p><p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><img width="366" height="48" alt="" src="http://file.open.com.cn/ItemDB/106726/79137e4b-8822-4795-818a-4a83d6fac72b/201343152736798.jpg" /></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">A</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">B</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">C</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span>D</span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; TEXT-INDENT: -14.175pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 14.15pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">电压降落指线路始末两端电压的（　　　）</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">数值差</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">分值差</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;&nbsp;&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">相量差</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">矢量差</span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">有备用电源接线方式的优缺点是<font face="Times New Roman">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">可靠性高、电压高&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">可靠性高、造价高&nbsp;&nbsp;</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">供电可靠性和电压质量高、造价高、调度复杂</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 5.25pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">供电可靠性高、调度方便、造价高</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">我国电力系统的额定频率为<font face="Calibri">(&nbsp;&nbsp;&nbsp;&nbsp;)</font></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">30HZ</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">40HZ</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">50HZ</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">60HZ</span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 150%; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">电力系统发生三相短路，短</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">路电流只包含</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">正序分量</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"> </span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">负序分量</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">零序分量</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 150%; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'">正序和零序分量</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 11pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">变压器等值参数<img align="middle" width="124" height="41" alt="" src="http://file.open.com.cn/ItemDB/106726/a1c55cfb-48d6-42f2-8cb9-919738a80f56/201343152850832.jpg" /></span><span></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">中，电压</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">U</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">N</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">和功率</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">S</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; VERTICAL-ALIGN: sub; mso-spacerun: 'yes'">N</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">的单位分别为<font face="Calibri">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">KV&nbsp;&nbsp;KVA</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; FONT-WEIGHT: normal; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">KV&nbsp;&nbsp;&nbsp;MVA</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">V&nbsp;&nbsp;&nbsp;MVA</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"> </span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;&nbsp;</span></p><!--EndFragment-->
D:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">KV&nbsp;&nbsp;&nbsp;VA</span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->

<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p15"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">系统发生单接地短路故障时，复合序网的连接方式为（　　）</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">正序、负序、零序串联</span></p><!--EndFragment-->
B:<p style="LINE-HEIGHT: 20pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">正序、负序并联、零序网开路</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">正序、零序并联、负序开路</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"> </span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">零序、负序并联，正序开路</span></p><!--EndFragment-->

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">中性点直接接地系统中，发生单相接地故障时，零序回路中不包含<font face="Calibri">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><!--EndFragment-->
A:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">零序电流</span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
B:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'"><font face="宋体">零序电压</font></span><span style="FONT-FAMILY: '宋体'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">&nbsp;</span></p><!--EndFragment-->
C:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">零序阻抗</span></p><!--EndFragment-->
D:<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt" class="p0"><span style="FONT-FAMILY: 'Calibri'; FONT-SIZE: 10.5pt; mso-spacerun: 'yes'">电源电势</span></p><!--EndFragment-->