高压架空电力线路一般都采用多股绝缘导线对不对

2025-04-02 16:04:36
推荐回答(4个)
回答1:

高压架空电力线路一般都采用多股绝缘导线,这句话是错的。

(1)导线是用来传导电流、输送电能的元件。架空裸导线一般每相一根,220kV及以上线路由于输送容量大,同时为了减少电晕损失和电晕干扰而采用相分裂导线,即每相采用两根及以上的导线。采用分裂导线能输送较大的电能,而且电能损耗少,有较好的防振性能。

导线在运行中经常受各种自然条件的考验,必须具有导电性能好、机械强度高、质量轻、价格低、耐腐蚀性强等特性。由于我国铝的资源比铜丰富,加之铝和铜的价格差别较大,故几乎都采用钢芯铝绞线。

每根导线在每一个档距内只准有一个接头,在跨越公路、河流、铁路、重要建筑、电力线和通信线等处,导线和避雷线均不得有接头。

(2)架空线路主要指架空明线,架设在地面之上,是用绝缘子将输电导线固定在直立于地面的杆塔上以传输电能的输电线路。

架设及维修比较方便,成本较低,但容易受到气象和环境(如大风、雷击、污秽、冰雪等)的影响而引起故障,同时整个输电走廊占用土地面积较多,易对周边环境造成电磁干扰。

架空线路的主要部件有: 导线和避雷线(架空地线)、杆塔、绝缘子、金具、杆塔基础、拉线和接地装置等。

扩展资料

架空线路的一般要求:

(1)架空线路应广泛采用钢芯铝绞线或铝绞线。高压架空线的铝绞线截面不得小于50平方毫米,芯铝绞线截面不小于35平方毫米,空线截面不16平方毫米。

(2)导线截面应满足最大负荷时的需要。

(3)截面的选择还应满足电压损失不大于额定电压的5%(高压架空线)、或2%~3%(对视觉要求较高的照明线路),并应满足一定的机械强度。

参考资料来源

百度百科-架空线路

回答2:

高压线路的架空电力线路的导线一般都采用多股裸导线,但近几年来城市区内的10KV架空配电线路逐步改用架空绝缘导线。

回答3:

为什么不能单个来呢,很简单的6024

回答4:

高压线路通常采用绝缘导线是为了安全。
1、架空绝缘导线不应视为绝缘设备,作业人员不得直接接触或接近。禁止工作人员穿越未停电接地或未采取隔离措施的绝缘导线进行工作。在停电检修作业中,开断或接入绝缘导线前,应做好防感应电的安全措施。
2、高压线通常指的是输送10KV(含10KV)以上电压的输电线路。根据GB/T 2900.50-2008,定义2.1中规定,高压通常不含1000V。中国国内高压输电线路的电压等级一般分为:35KV、110KV、220KV、330KV、500KV、750KV等。
3、其中110KV、330KV多用于北方地区。一般称220千伏以下的输电电压叫做高压输电,330到750千伏的输电电压叫做超高压输电,1000千伏以上的输电电压叫做特高压输电。
4、高压输电在城市一般采用带绝缘层的电缆地下传输,在野外常采用铁塔承载的架空线方式传输。

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