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"Times New Roman"'>城市中低压配电网由架空线路、电缆线路、柱上变压器、开闭所</span>(<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>开关站</span>)<span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>、配电站或室</span>(<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>含箱式变电站</span>)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>、接户线等组成。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>3.3<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>公用架空线路现阶段仍是城市中低压配电网的重要组成部分，应充分发挥其作用。随着城市建设的不断发展，在有条件的地区可逐步发展电缆网络。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>3.4<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市中低压配电网是城市的重要基础设施之一，城市配电网的改造应纳入城市改造和建设的统一规划。各地供电部门应与地方城建部门密切配合，并取得他们的充分理解和支持。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>3.5<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市中低压配电网的改造应与城市高压电力网的规划和建设相结合，与市政工程相结合，与业扩报装工程相结合，与配电网的大修、更改工程相结合。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>3.6<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>在配电网改造中应积极采用新技术、新设备、新工艺、新材料，但应持慎重态度，以确保电力系统的安全运行。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>3.7<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市中低压配电网无功补偿应根据就地平衡的原则进行配置，可采用分散补偿和集中补偿相结合的方式。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal> <span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<P class=MsoNormal><A NAME="A5"></A>4 <span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"></span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压配电网</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></P>
<p class=MsoNormal>4.1<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市中压配电网应根据高压变电所布点、负荷密度和运行管理的需要划分成若干个相对独立的分区配电网。分区配电网应有较为明显的供电范围，一般不应交错重叠。分区的划分要随着情况的变化适时调整。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.2<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压配电网应有一定的容量裕度，当负荷转移时不致使载流元件过载。当任何一个中压馈电柜因故停运时，通过倒闸操作，能继续向用户供电；当发生线路事故时，通过倒闸操作，能继续向非故障线路段用户供电，配电线路不过负荷，不限电。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.3<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压配电网应有较大的适应性，主干线截面应按长期规划</span>(<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>一般为</span>20a)<span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>一次选定，多年不变。在不敷需要时，可另敷设新线路或插入新的高压变电所。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.4<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>架空线路的正常运行负荷电流一般应控制在其安全电流的</span>2/3<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>以下，超过时应采取分路措施。电缆线路的正常运行负荷电流应根据其在电网中的地位留有适当的裕度。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.5<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压配电网应选用短路容量能满足较长期发展需要、可靠性高、体积小、维护工作量少和操作简单的新型设备，如</span>SF<sub>6</sub><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>开关、真空开关、环网单元、小型封闭式配电装置及各种新型熔断器。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.6<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市道路网是城市配电网建设的依托，每条道路至少应留有一条架空线路路径。城市主、次干道均应留有电缆敷设位置，有些干道还应留有电缆隧道或排管位置。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>架空线路。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7.1<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>城市中压架空配电网应采用环网布置，开环运行的结构。中压线路的主干线和较大的支线应装设分段开关，线路分段一般为三段。相邻变电所及同一变电所馈出的相邻线路之间应装设联络开关。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7.2<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压架空线路宜采用铝绞线，主干线截面应为</span>150<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>～</span>240mm<sup>2</sup><span lang=ZH-CN style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，考虑城市电力网的发展，分支线截面不宜小于</span>70mm<sup>2</sup><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7.3<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>化工污秽及沿海地区宜采用绝缘线、铜绞线或钢芯铝绞线。当采用绝缘线时，绝缘子绝缘水平按</span>15kV<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>考虑。当采用铜绞线或钢芯铝绞线时，绝缘子绝缘水平按</span>20kV<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>考虑。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7.4<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>为提高供电可靠性，可采用绝缘线。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.7.5<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>中压架空线路宜采用长度为</span>12m<span lang=ZH-CN style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>电杆，必要时，可采用长度为</span>15m<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>及以上电杆。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.8<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>电缆电路。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.8.1<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>电缆线路是城市配电网的重要组成部分，下列地区宜采用电缆线路：</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>a)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>依据城市规划，繁华地区、大中型住宅小区和市容环境有特殊要求的地区；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>b)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>街道狭窄，架空线路走廊难以解决的地区；</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>c)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>供电可靠性要求较高或负荷较大的用户；</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>d)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>电网结构需要时。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.8.2<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>为提高设备利用率，应发展公用电缆网，严格控制专用电缆线路。公用电缆线路连接供电点的数量及接用容量的确定应考虑运行及管理的要求。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.8.3<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>公用电缆网的结构形式可采用单放射式、双放射式、单环网式和双环网式等。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal>4.8.4<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>依重要程度，以电缆向用户供电的形式如下：</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>a)<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>以一路电缆向用户供电</span>(<span lang=ZH-CN style='font-family:宋体;
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