OPGW光缆选型需要了解的几大原则

近年来，我国电力需求的扩大化，促进了电力光缆市场的发展，就目前来说，ADSS光缆和OPGW光缆是运用在电力系统上两种比较常规的电力光缆。

很多客户在线路光缆的选型问题上比较纠结，一般来说，ADSS光缆在改造线路上运用较多，OPGW光缆一般在新建线路，当然，每一种光缆的选择有一定的选型要求，今天我们详解一下OPGW光缆的选型原则。

主要有五点；

线路发生接地短路事故时，流经OPGW的故障电流所产生的热量不影响光纤的传输质量和OPGW的机型性能；

OPGW与相导线在档距*的防护间距满足设计规程要求；

OPGW荷载满足铁塔设计要求；

OPGW的运行安全系数大于相导线的运行安全系数；

OPGW的纤芯余长率大于OPGW自身蠕变和温度变化而引起的线长变化率。

总的来说，每一条线路的选型需要根据项目的环境条件来进行设计，一般由设计单位进行设计，在光缆的选型上会更多的进行反复讨论，并最终确定。

The principle and key factors to confirm the OPGW cable type

With the expansion of global's power demand and the innovation of smart grid technology, its promote power optical cable market. Up to now, the ADSS (All-Dielectric Self-Supporting) cable and OPGW (Optical Ground Wire) cable is commonly used in the power system.

For the power system transmission, the customer will confused for choose the power optical cable.

As per our 20 years experience on power system transmission, our professional team strongly recommend follow the one principle and five key factors confirm the OPGW cable type.

Principle: the ADSS cable on existing-transmission lines, and the OPGW cable on new-transmission lines.

Key factors:

1. The passing short circuit shall not affect the mechanical profermance of OPGW if any occurs happend;

2. The distance between OPGW and phase conductor shall meet the design requirements;

3. OPGW loading strenth shall meet the tower design requirements;

4. OPGW operation safety index shall greater than the phase conductor operating safety index;

5. OPGW core length is greater than OPGW own creep and temperature changes caused by the line length change rate.