根据国家电网(他们也需要尽早更换输电线路)所说：这使得安装地下电缆比架空线路昂贵12到17倍。
That makes installing subsurface cables 12 to 17 times as pricey as overhead lines, according to National Grid (they also need replacing sooner).
由于电缆的充电功率比普通架空线路高一个数量级，如何进行无功补偿是一个需要认真研究的课题。
As charging power of cable is about one order of magnitude higher than general overhead line, how to compensate reactive power is a new subject to us.
架空线路单位长度的停电数要比地下电缆的多，但停电持续时间短。
Overhead lines have more outages than underground cable per unit length, but the outages are usually shorter in duration.
对目前城市配电网中常见的架空线路网络结构和电缆线路网络结构进行了较为全面的分析。
It analyzed the structure of overhead network and cable line which are common in the city's distribution network.
针对架空线路和电缆的波速度的差异，故障点的时间中点搜索算法的基础上提出。
Aiming at the difference of wave rate in overhead lines and cables, fault point seeking algorithm based on time mid-point is proposed.
该文提出利用线路故障产生的暂态行波实现配电架空线、电缆混合线路单相接地及相间短路故障测距，分析了故障初始行波模分量的暂态特征。
Using transient traveling waves generated by fault to locate single-phase earth fault or short circuit fault in distribution feeders mixed with overhead lines and cables is proposed.
该文提出利用线路故障产生的暂态行波实现配电架空线、电缆混合线路单相接地及相间短路故障测距，分析了故障初始行波模分量的暂态特征。
Using transient traveling waves generated by fault to locate single-phase earth fault or short circuit fault in distribution feeders mixed with overhead lines and cables is proposed.
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