10kV线路供电半径是多少?查资料有说是15KM的,是主线长度,还是包括支线的?
有3个网友回答
10kv等级线路一般不超过半径15km,是包括支线的长度。
供电半径取决于以下2个因素的影响:
1、电压等级(电压等级越高,供电半径相对较大)
2、用户终端密集度(即:电力负载越多,供电半径越小)
0.4千伏线路供电半径在市区不宜大于300米。近郊地区不宜大于500米。接户线长度不宜超过20米,当超过250米时,每100米加大一级电缆。 110kV供电线路一般不超过60km;35kV供电线路一般不超过30km。

扩展资料:
供电的规划
主要是根据各种发电方式的特性和资源条件,决定增加何种形式的电站(水电、火电、核电等),以及发电机组的容量与台数。承担基荷为主的电站,因其利用率较高,宜选用适合长期运行的高效率机组。
如核电机组和大容量、高参数火电机组等,以降低燃料费用。承担峰荷为主的电站,因其年利用率低,宜选用启动时间短、能适应负荷变化而投资较低的机组,如燃汽轮机组等。至于水电机组,在丰水期应尽量满发,承担系统基荷;在枯水期因水量有限而带峰荷。
由于水电机组的造价仅占水电站总投资的一小部分,近年来多倾向于在水电站中适当增加超过保证出力的装机容量(即加大装机容量的逾量),以避免弃水或减少弃水。
对有条件的水电站,世界各国均致力发展抽水蓄能机组,即系统低谷负荷时,利用火电厂的多余电能进行抽水蓄能;当系统高峰负荷时,再利用抽蓄的水能发电。
尽管抽水-蓄能-发电的总效率仅2/3,但从总体考虑,安装抽水蓄能机组比建造调峰机组还是经济,尤其对调峰容量不足的系统更是如此。
电网规划,即在已确定的电源点和负荷点的前提下,合理选择输电电压等级,确定网络结构及输电线路的输送容量,然后对系统的稳定性、可靠性和无功平衡等进行校核
参考资料来源:百度百科--电力系统
参考资料来源:百度百科--供电半径
根据规程规范;10kv等级线路一般不超过半径15km,是包括支线的长度。
同时供电质量,电压降是正负7%。
例子;U=10kv L=15000m S=LGJ-240mm2 铝电阻率0.0315mm.m COSφ=0.8
P=1150kw Q=863kvar 10kv 电抗X=0.35Ω.km=0.35*15=5.25Ω
求电阻 R=ρ*L/S=0.0315*15000/240=1.97Ω
根据电压损失公式;
△U=P*R+Q*X/U(kv)=1150*1.97+863*5.25/10=2266+4731/10=6997/10=699.7v
△U%=△U/U*100=(699.7/10000)*100=7%
10kv线路半径15km选240mm2铝导线架空敷设,理论COSφ=0.8 ,末端电压降控制7%,可带负荷1150kw。
各电压等级供电半径要求
供电半径取决于以下2个因素的影响:
1、电压等级(电压等级越高,供电半径相对较大)
2、用户终端密集度(即:电力负载越多,供电半径越小)
0.4千伏线路供电半径在市区不宜大于300米。近郊地区不宜大于500米。接户线长度不宜超过20米,当超过250米时,每100米加大一级电缆。 110kV供电线路一般不超过60km;35kV供电线路一般不超过30km。
供电半径是指从电源点到最远的 用电负荷点之间的线路距离。
线路距离当然包括所有的线路长度啦,无论是主线还是支线都要计算在内的。
技术规程规定,供电半径一般应不超过下列要求:110kV线路为150km,66kV线路为80km,35kV线路为40km,10kV线路供电半径15km,0.4kV不超过500m。。同时供电质量,电压降是正负7%。
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