OPGW光纜選型需要了解的幾大原則

近年來，我國電力需求的擴(kuò)大化，促進(jìn)了電力光纜市場的發(fā)展，就目前來說，ADSS光纜和OPGW光纜是運(yùn)用在電力系統(tǒng)上兩種比較常規(guī)的電力光纜。

很多客戶在線路光纜的選型問題上比較糾結(jié)，一般來說，ADSS光纜在改造線路上運(yùn)用較多，OPGW光纜一般在新建線路，當(dāng)然，每一種光纜的選擇有一定的選型要求，今天我們?cè)斀庖幌翺PGW光纜的選型原則。

主要有五點(diǎn)；

線路發(fā)生接地短路事故時(shí)，流經(jīng)OPGW的故障電流所產(chǎn)生的熱量不影響光纖的傳輸質(zhì)量和OPGW的機(jī)型性能；

OPGW與相導(dǎo)線在檔距中央的防護(hù)間距滿足設(shè)計(jì)規(guī)程要求；

OPGW荷載滿足鐵塔設(shè)計(jì)要求；

OPGW的運(yùn)行安全系數(shù)大于相導(dǎo)線的運(yùn)行安全系數(shù)；

OPGW的纖芯余長率大于OPGW自身蠕變和溫度變化而引起的線長變化率。

總的來說，每一條線路的選型需要根據(jù)項(xiàng)目的環(huán)境條件來進(jìn)行設(shè)計(jì)，一般由設(shè)計(jì)單位進(jìn)行設(shè)計(jì)，在光纜的選型上會(huì)更多的進(jìn)行反復(fù)討論，并確定。

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.