线路设计手册

1架空配电线路1.1设计气象条件参照通州地区多年经营经验，该地区轨道设计气象条件被选定为架空配电线路设计技术规程 (SDJ206-87)所列典型级气象区，气象参数如下：序号气象条件温度(c)风速(m/s)冰厚度(mm)1最高气温40002最低气温-20003用冰复盖-51054最大风速-52505外部过电压151006内部过电压101507平均气温10008安装情况-101009雷电日40天1.2风荷载计算1.2.1风载体类型系数c风吹在建筑物表面的压力或吸入反应和按照原始风速计算的理论风压比率称为风载系数。导线，避雷线风载体类型系数c，使用以下值：直线直径17mm:1.2直线路径 17mm: 1.1结冰(不管路径大小):1.2杆(塔)体的风荷载系数c使用以下值：圆形剖面钢筋混凝土条：0.6矩形剖面钢筋混凝土条：1.4角塔式机：1.4(1 )是空间桁架配风面的风荷载衰减系数，通常使用表1-2-1中列出的值。表1-2-1空间桁架配风面的还原系数F/FkB/h0.10.20.30.40.50.61.011.00.850.660.500.330.150.1521.00.900.750.600.450.300.30注意：f是风压方向杆(塔)主体构件的投影面积(m2)。Fk是桁架的轮廓区域(m2)。b是桁架前后的距离(m)。h是桁架的风面宽度(m)。1.2.2风荷载计算极点、导体的风荷载可按如下方式计算：W=9.807cFv2/16W极或导体的风荷载(n)；C风载体类型系数，按1.2.1选择；F极体侧面的投影区域或钢丝直径与水平文件距离的乘积(m2)；L1=(L1 L2)/2，样式L1，L2分别是极两侧的文件距离。V设计风速(m/s)。1.3导线1.3.1线材设计安全系数表1-3-1导线设计最小安全系数导线类型单股多股一般区域重要地区LJ，LGJ-2.53.0TJ2.52.02.5架空绝缘线-3.03.01.3.2电线公共参数铝绞线、钢芯铝绞线、架空绝缘线的物理特性参数和长期允许的载流量可根据下表进行选择。表1-3-2铝绞线的弹性模量和线膨胀系数单线管线数最终弹性系数e(实际值)(N/mm2)线膨胀系数 (10-6 1/c)75900023.0195600023.0375600023.0615400023.0注：弹性模量值的准确度为3000n/mm2；是。弹性系数适用于拉力为15%至50%的铝竞选。表1-3-3钢芯铝绞线的弹性模量和线膨胀系数结铝-钢截面比率最终弹性系数e(实际值)(N/mm2)线膨胀系数(计算值)(10-6 1/c)铝钢铁616.007900019.1775.067600018.51271.7110500015.318118.006600021.22477.717300019.62676.137600018.93074.298000017.830194.377800018.042719.416100021.445714.466300020.948711.346500020.55477.716900019.354197.906700019.4注：弹性模量值的准确度为3000n/mm2；是。弹性系数适用于拉力为15%至50%的铝竞选。表1-3-4铝绞线物理特性参数和长期允许载流量公称截面结构计算截面外径计算计算重量载流量直流电阻(mm2)管线数/直径(mm2)(毫米)拉力(kg/km)(a)不比下一个大10(毫米)(n)75(/km)167/1.7015.895.1284043.51051.802257/2.1525.416.45435569.61351.127357/2.5034.367.5576094.11700.8332507/3.0049.4897930135.52150.5786707/3.6071.2510.810950195.12650.4018957/4.1695.1412.4814450260.53250.300912019/2.85121.2114.2519420333.53750.237315019/3.15148.0715.7523310407.44400.194318519/3.50182.817.5284405035000.157421019/3.75209.8518.7532260577.40.137124019/4.00238.762036260656.96100.120530037/3.20297.5722.446850820.46800.0968940037/3.70397.8325.96115010970.0724750037/4.16502.929.127637013870.0573363061/3.63631.332.679194017440.0457780061/4.10805.3636.911590022250.03588表1-3-5钢芯铝绞线物理特性参数和长期允许载流量公称截面结构布线数/直径计算截面外径计算计算重量载流量直流电阻铝/钢(毫米)(mm2)(毫米)拉力(kg/km)(a)不比下一个大(mm2)铝型材总计(n)(/km)10 /26/1.50 1/1.5012.374.5412042.9872.70616/36/1.85 1/1.8518.825.55613065.21051.77925 /46/2.32 1/2.3229.596.969290102.61351.13135/66/2.72 1/2.7240.678.16126301411700.82350 /86/3.20 1/3.2056.299.616870195.10.594650 /3012/2.32 7/2.3280.3211.6426203722200.569270/106/3.80 1/3.8079.3911.423390275.20.421770/4012/2.72 7/2.72110.413.658300511.32750.414195/1526/2.15 7/1.67109.7213.6135000380.80.305895/207/4.16 7/1.85113.9613.8737200408.90.301995/5512/3.20 7/3.20152.811678110707.73350.2992120/718/2.90 1/2.90125.514.5275703790.2422120/2026/2.38 7/1.85134.4915.0741000466.80.2496120/257/4.72 7/2.10146.7315.7447880526.60.2345120/7012/3.60 7/3.60193.41898370895.63800.2364150/818/3.20 1/3.20152.81632860461.40.1989150/2024/2.78 7/1.85164.516.6746630549.40.198150/2526/2.70 7/2.10173.1117.1541106010.1939150/3530/2.50 7/2.50181.6217.565020676.24450.1962185/1018/3.60 1/3.60193.418408805840.1572185/2524/3.15 7/2.10211.2918.959420706.10.1542185/3026/2.98 7/2.32210.9318.8864320732.60.1592185/4530/2.80 7/2.80227.8319.680190848.25150.1564210/1018/3.80 1/3.80215.481945140650.70.1411210/2524/3.33 7/2.22236.1219.9865990789.10.138210/3526/3.22 7/2.50246.0920.3874250853.90.1363210/5030/2.98 7/2.98258.0620.8690830960.80.1381240/3024/3.60 7/2.40275.9621.675620922.20.1181240/4026/3.42 7/2.66277.7521.6683370964.30.1209240/5530/3.20 7/3.20297.5722.410210011086100.1198300/1542/3.00 7/1.67312.2123.0168060939.80.09724300/2045/2.93 7/1.95324.3323.437568010020.0952300/2548/2.85 7/2.22333.3123.768341010580.09433300/4024/3.99 7/2.66338.9923.949222011330.09614300/5026/3.83 7/2.98348.3624.2610340012100.09636300/7030/3.60 7/3.60376.6125.212800014027000.09463400/2042/3.51 7/1.95427.3126.918885012860.07104400/2545/3.33 7/2.22419.0126.649594012950.0737400/3548/3.22 7/2.50425.2426.8210390013490.073389400/505