通信光缆寿命探讨

本文给出了产品寿命及光缆寿命的概念和特点,分析了衰减对光缆寿命的影响,分析了色散及PMD对光缆寿命的影响,分析了光纤疲劳机理及护套老化机理,给出了评估光纤疲劳寿命和护套老化寿命的方法,给出了拉萨野外台站大气暴露的5年期护套自然老化的曲线图,初步评估了光纤疲劳寿命和护套老化寿命,为光缆寿命评信及线路维护给出了建议.     

光缆老化现状研究及寿命探讨

2010年至今,烽火通信科技股份有限公司有幸收集到一些在通信传输线路上使用了10-25年的光缆样本,本文着重介绍了该光缆的老化情况和样本测试分析方法,并对光缆在长期使用后出现的劣化现象和原因进行了分析.     

浅谈电力通信光缆线路故障、维护要点及途径

在电力系统中,电力通信光缆是重要的组成部分,在日常生活中有着广泛应用。电力通信光缆的运行质量直接关乎电力系统是否能够安全稳定地运行。电力通信一方面给人们的生活带来了便捷,另一方面在运行中受到诸多因素的干扰会存在线路运行故障。文章针对电力通信光缆线路故障、维护要点及途径进行探究。     

研究在运行架空光缆防鼠新方法

光纤传输通信系统是最常用的传输系统之一。近年来,随着电网的快速发展,光通信技术在电力系统中得到了广泛的应用,电力通信光缆数量迅速增加。因具有施工周期短,机械性能好,与输电线路相关性小,便于维护等优点,ADSS光缆和普通光缆近年来的使用范围不断扩大。与此同时架空光缆遭鼠类啃咬发生的缺陷也越来越多,对电力通信网安全稳定运行造成了极大的威胁。文章通过对鼠类破坏光缆的原因和特点进行分析,找出防止鼠类啃咬光缆的方法,保证通信光缆安全可靠运行,为电力系统的安全稳定奠定了坚实的基础。     

北京联通建立光缆自动监测系统的探索

1前言 随着光缆数量的增加以及早期敷设光缆的老化,光缆线路的故障在不断增加。在传统光缆线路维护管理模式中,故障查找困难,排障时间长,影响通信网络的正常工作,每年因通信光缆故障而造成的经济损失巨大。因此,对光缆线路进行实时监测与管理,     

电力系统专用光缆--OPGW

主要对电力系统专用光缆—— OPGW的结构和主要性能进行了简单分析     

OPGW的应用

对复合架空地线光缆OPGW在电力系统的应用进行探讨,并结合实际对OPGW施工中需注意的事项作了一些论述.     

基于复杂网络的电力光缆传输网脆弱性分析及优化

电力光缆传输网是支撑电力网安全生产的重要环节,它出现故障会对整个电力系统的安全运行带来重大影响。因此,针对电力光缆传输网进行脆弱性分析与网络优化,可以有效增强电力光缆抵御故障的能力,同时极大地提高电力系统的安全性与稳定性。文中以电力光缆网络数学建模为基础,利用复杂网络理论对实际网络鲁棒性和脆弱性进行分析,以期找出存在于网络中的脆弱环节,进而实现网络优化,进一步提高网络抵御故障的能力。     

电力系统特种光缆

光纤通信,具有中继距离长、传输容量大、传输质量好,特别是具有抗电磁干扰、不受高电压与大电流影响等优点,再者,它可利用电力系统特有的输电线路资源,如地线复合光缆（ＯＰＧＷ）、缠绕式光缆（ＧＷＷＯＰ）、全塑自承式光缆（ＡＤＳＳ）等电力系统特种光缆,因此,光纤通信在电力系统中得到了越来越广泛的应用。目前,电力系统正在建设以光纤通信为主的现代通信网,电力专用通信网将形成全国性的三横四纵的光纤主干网,各省、市、县都已建和正在建设光纤网。 除大量使用普通光缆外,电力系统专用的特殊光缆主要有４种：无金属捆绑式…     

业京供电局光缆监测系统的建设与应用

1概述由于光纤通信具有传输容量大、抗干扰能力强、传输衰耗小等优点,因此在电力专用通信网中得到了广泛应用。随着电力系统通信专网的建设,光纤网络日益庞大和复杂。如何提高运行维护效益,确保光纤网络的可靠畅通,正成为电力系统通信人员关注的焦点。传统的光缆维护方式存在4个问题:(1)检修时间是按照部颁规程制定的,随着光缆数量的增多,按期完成对光缆的测试成为非常繁重的任务,耗费人力和物力,且效率低。(2)由于测试周期不能保证,无法对光缆劣化情况进行分析,因而在此基础上进行的光缆运行分析缺乏科学依据。(3)光缆发生故障时,传输网管…     

光缆在线监测系统

近几年来光缆在电力系统的应用越来越普及，电力系统的通信、自动化、维护等越来越依赖高可靠、高性能的光纤传输。但在实际应用中，由于受外力及光缆本身质量等因素影响，光缆很容易遭到破坏，从而影响光缆的传输质量。光缆在线监测系统能在光缆遭到破坏时迅速确定光缆的故障点，为光缆故障修复提供宝贵的时间。     

光纤总线型煤矿井下电网监控系统的研制

介绍了以可编程逻辑控制器为核心的全光介质的煤矿井下光纤总线和井下工业以太网组成的电网监控系统,主干传输介质采用本质安全的矿用阻燃光缆,井下网络采用光缆或电缆,实现井下变电所、人员、设备、电网运行状况及参数的综合监控,该系统具有电气防爆、抗干扰强、服务半径大、信道容量大等特点,极大改善煤矿安全生产现状。同时该系统电气接口及通信协议规范透明,不依赖于系统提供商,使用国际标准接口,便于与其它系统互联,也可扩展构成全矿井控制系统。     

Subscriber optical fiber cable transfer splicing system usingmechanically transferable connectors

An optical fiber cable transfer splicing system is developed for use in removing or changing optical fiber cables. The system enables rapid transfer from existing optical fiber cables to newly installed ones. The transfer is carried out synchronously using two mechanically transferable connectors which terminate the optical fiber cables at two different points, such as manholes. Before the transfer splicing, the system identifies a fiber ribbon in order to avoid mistransfer. A transfer time of less than 30 ms was achieved. The fiber ribbon was identified with a loss, from an identification light source to an identification point, of 35.5 dB. With this system, cable transfer can be faultlessly carried out with only a slight interruption to working transmission systems and circuit quality degradation is suppressed     

分布式光纤传感技术在电力电缆监测的应用

为了保证电力电缆的安全问题,电力电缆的温度监测十分关键。针对目前一些光纤测温产品的不足,提出了一种长距离分布式光纤传感器,其具有测量灵敏度高、响应速度快、误报率低、测量长度大、工作稳定等优点。该传感器基于布里渊光时域反射原理,构造了用于实时监测的分布式光纤测试系统。对该系统的性能进行了检测实验,实验验证该测温系统测温精度误差范围在±0.50C左右,且具有很好的稳定性,同时,定位精度很高,可以准确的定位故障点,以此可以避免电缆事故的发生。     

Undersea fiber cable technology

Compared with the conventional coaxial undersea cable systems, an optical fiber undersea cable system has a great technical and economical advantage. It is also suitable for digital transmission. In this paper, the optical fiber undersea cable technology (including optical fiber cables and repeaters), which is now in the research and development stage in several countries, is reviewed.     

浅谈海底光缆的分类

对海底光缆按应用范围、纤芯和有无中继器进行了分类,对几种常用海底光缆进行了比较,介绍了主流厂商海底光缆张力指标及海底光缆常用光纤主要性能指标。     

Measurement of longitudinal strain in optical fiber cables during installation by cable ploughing

This paper reports a series of experiments in which a number of optical fiber cables were installed using cable ploughing equipment. The elongation of fibers in these cables was monitored during installation in order to assess whether excessive strain levels were encountered. The experiments confirmed that optical fiber cables can be satisfactorily installed using such techniques, and that residual strain levels were sufficiently low that the fiber lifetime was not prejudiced. It was found that optical fiber cables that are flexible and in which fibers are loosely housed can be installed with lower strain levels than other cables. A range of cable-ploughing equipment was used, and equipment which controlled the rate at which cable was fed from the cable drum was found to yield the best performance.     

Studies on designing of submarine optical fiber cable

This paper describes important studies necessary to design submarine optical fiber cables. These include a study for deciding the optimum single-mode fiber parameters to suppress losses during cabling, cable laying, and so on. It also includes a study on the necessary fiber proof test conditions to prevent fiber breakage during cable handling, that is, during cable laying and recovery and to assure long-term fiber reliability. Submarine optical fiber cable sea trial results are also stated for cables designed applying these studies.     

室内光缆的探讨

随着光纤光缆的大量使用,光缆进入建筑物内将不可避免,于是室内光缆应运而生并被迅速普及,成为光缆领域未来研究发展的热点,其市场前景非常广阔。室内光缆要求结构简单、价格便宜、易于分线和连接、阻燃等,因此有必要对室内光缆的诸多方面,包括结构、材料、标准和检测方法等进行研究。对室内光缆进行了简要的介绍,对室内光缆的各种典型结构及应用进行讨论,并对室内光缆的生产设备、标准和检测方法作了简单分析。     

Design and performance of ultra-high-density optical fiber cable with rollable optical fiber ribbons

This paper proposes a novel ultra-high-density optical fiber cable that employs rollable optical fiber ribbons. The cable has great advantages in terms of cable weight and diameter, and fiber splicing workability. Moreover, it will be easy to install in a small space in underground ducts and on residential and business premises. The structural design of the rollable optical fiber ribbon is evaluated theoretically and experimentally, and an optimum adhesion pitch P in the longitudinal direction is obtained. In addition, we examined the performance of ultra-high-density cables with a small diameter that employ rollable optical fiber ribbons and bending-loss insensitive optical fibers. The transmission, mechanical and mid-span access performance of these cables was confirmed to be excellent.