OPGW在电力光传输网中的应用与发展

随着光纤技术的发展,光缆也呈现出多元化的发展趋势,作为电力特种光缆之一的光纤架空地线复合缆(OPGW)以其独特的优越性在电力系统光通信领域得到了长足的发展和广泛应用.文章首先阐述了OPGW的概念和特性要求,然后针对OPGW在电力系统设计、施工及应用中的注意事项做了较详细的叙述,最后结合许昌电力通信网发展规划,说明了许昌供电系统中OPGW的应用现状.文章对电力系统光纤通信工程设计和施工具有一定的参考、借鉴意义.     

OPGW选型设计问题分析

架空地线复合光缆是将光纤媒体符合在架空地线当中的一种光缆形式,在目前的通信行业当中应用较广,而其选型设计则直接关系着OPGW的铺设质量.本文主要对架空地线复合光缆当中选型设计等问题进行了分析讨论,以期能够不断促进光缆设计和安装质量.     

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.     

湖北电力系统“天一路”线OPGW光缆设计

光纤复合架空地线(OPGW)光缆通信是将光纤单元复合于送电线路地线内,利用光纤单元开通通信通道兼具地线和光缆的双重功能。它随高压输电线路一起架设,不需占用新的敷设走廊,是一种传输容量大、可靠性高、不受强电干扰的通信方式。湖北“220KV天堂抽水蓄能电站一路口变送电线路工程”光纤复合架空地线(OPGW)光缆于2000年2月完成设计,2000年8月线路投入运行。系统各项指标满足设计要求,运行至今稳定可靠,为线路继电保护及系统通信提供优质的通信通道。     

光纤复合架空地线(OPGW)光缆与应用

1 OPGW光缆的用途及结构性能电力系统用光缆主要是在高压输电线路上利用现有杆塔安装光纤通信线路.光纤复合架空地线(0PGW)光缆兼具地线和光缆的双重功能,这种地线光缆结构简洁可靠,可以设计成与现有地线相匹配,安装在铁塔上不会增加负荷,而且可以保持现有挡距,非常适合应用在输电线路上.     

中心PBT松套管复合铝管OPGW的生产工艺

简要介绍了光纤松套管复合铝管光缆复合架空地线(OPGW)的发展,新技术的出现以及其优良的抗电化学腐蚀性能、抗雷击性能、耐振动疲劳性能,使该类OPGW的应用需求开始扩大。详细介绍了中心PBT(聚对苯二甲酸丁二醇酯)松套管复合铝管OPGW的关键生产工艺,包括光单元制作、隔热带纵包、铝管挤出等。     

光纤架空复合地线（OPGW）设计概述

简要介绍了电力通信线路用光纤架空复合地线(OPGW)的发展历程，并详细阐述了OPGW光缆的结构设计及验证过程。     

地线复合光缆的可靠性分析

由于地线复合光缆（OPGW）的高可靠性及适用性,目前已被电力系统广泛采用。本文讨论了几种不同结构OPGW的可靠性。     

湖北电力系统“天—路”线OPGW光缆设计

光纤复合架空地线（OPGW）光缆通信是将光纤单元复合于送电线路地线内,利用光纤单元开通通信通道兼具地线和光缆的双重功能。它随高压输电线路一起架设,不需占用新的敷设走廊,是一种传输容量大、可靠性高、不受强电干扰的通信方式。湖北“220KV天堂抽水蓄能电站－路口变送电线路工程”光纤复合架空地线（OPGW）光缆于2000年2月完成设计,2000年8月线路投入运行。系统各项指标满足设计要求,运行至今稳定可靠,为线路继电保护及系统通信提供优质的通信通道。一、工程概况工程线路起点为在建的罗田天堂抽水蓄能电站,终点为已运行多…     

光纤复合架空相线的相关技术及应用

光纤复合架空相线(OPPC)是一种将光纤单元复合在架空相线中的光缆.通过对其特点、关键技术和施工工艺的深入研究,证实了该技术是对OPGW和ADSS等技术的有益补充,并能够充分利用电力系统自身的线路资源,避免在频率资源、路由协调、电磁兼容等方面与外界的矛盾,提高电力系统通信的安全性、可靠性.     

基于BOTDA的OPGW应变性能研究

为研究长期运行光纤复合架空地线(OPGW)的应变性能,使用高精度的分布式光纤传感监测设备布里渊光时域分析仪(BOTDA)对新缆和不同覆冰环境下的旧缆进行应变监测,对比分析了OPGW光缆内光纤的布里渊频率在长期外界环境作用下的变化.试验结果表明,运行时间和覆冰等级是影响OPGW光缆内光纤应变性能的主要因素.     

On-situ monitoring of sleet-thawing for OPGW based on long distance BOTDR

With the absence of on-situ temperature monitoring of optical fiber composite overhead ground wire (OPGW) for the process of sleet-thawing, early temperature warning and safety control of direct current (DC) in sleet-thawing process is difficult. Here we propose a Brillouin optical time-domain reflectometry (BOTDR) with broadband receiving for fast measurement and with distributed Raman amplification for long distance measurement of about 100 km. A field experiment for on-situ temperature monitoring of sleet-thawing of OPGW is also reported, which shows uneven change of temperature along the OPGW. The difference between the maximum and the minimum temperature change can be greater than 40 °C.     

特高压工程用OPGW光纤附加衰减的工艺控制

介绍了特高压OPGW(光纤复合架空地线)工程应用。从特高压OPGW产品的实现方面,分析光纤附加衰减的产生原因。通过对特高压OPGW生产过程中的光纤喷环工艺、光纤着色工艺、不锈钢光单元造管工艺的不同工艺方法的对比,优化对光纤附加衰减的工艺控制,实现了产品光纤附加衰减指标满足相关电力行业标准的同时达到客户的需求值,最终得到适宜特高压工程用OPGW生产光纤附加衰减控制的最佳工艺实现方案。     

Design and analysis of a wireless monitoring network for transmission lines in smart grid

In order to timely and precisely locate a problem over the power lines, the control center needs to monitor the status of the transmissionlines and the towers. In this paper, we design such a monitoring network by taking advantage of the existing optical fiber composite overhead ground wire (OPGW) alongside the transmission lines. Because it is not cost‐effective to have gateway access to the OPGW for every transmission tower, we propose to deploy a multi‐hop wireless sensor network in between two sparsely deployed neighboring OPGW gateways. We mainly study the power allocation for the data transmission of the wireless sensors because of the assumption that such sensors are powered by green energy and a battery with limited capacity for easy deployment and maintenance. Specifically, we propose several centralized schemes with different objectives, for example, the minimum power usage and fast computation. We also propose a distributed scheme so that the sensors can be even more energy efficient dealing with dynamic traffic in field operations. Moreover, we analyze the centralized schemes to study their pros and cons. We also conduct a case study for the distributed scheme to demonstrate its feasibility in field operations. Copyright © 2015 John Wiley & Sons, Ltd.     

光纤复合架空地线(OPGW)短路电流试验

文章介绍了光纤复合架空地线短路电流试验及试验结果的分析.     

基于三次样条函数的光栅传感光缆舞动波长估计

基于光栅传感的分布式光纤复合架空地线(OPGW)健康监测得到了广泛研究。针对OPGW光缆舞动事件,提出一种基于三次样条函数拟合的舞动波长预测方法。首先,通过理论推导,建立光栅传感相位变化量与舞动波长的数学联系；然后,利用仿真分析理想舞动情况下信号三次样条函数拟合前后的相移信号结果,初步证明了所提方法的有效性；最后,将其应用在某220kV线路,对比分析典型弱风环境及强风环境下的舞动监测强度图。实际监测结果表明,所选取方法能够有效改善强度图信号特征,可得出强风条件下档距内舞动波长约为200m,弱风条件下档距内舞动波长约50m。该方法为舞动事件的图像识别智能监测提供技术参考,具有较好的应用前景。     

风振对OPGW偏振态和通信的影响

光纤复合架空地线(OPGW)中光信号的偏振态会因风振而改变,进而导致系统性能的劣化.为了了解风振对OPGW偏振态的影响,通过实验模拟了在不同摆动情况下OPGW的偏振态变化,并基于所测试的数据分析了偏振态的变化规律和风振对相干光通信的影响,给出了相干光通信系统中所需要补偿算法的计算依据.实验结果表明:2种风振导致的信号光...     

Response of an overhead wire near a NEMP simulator

The response of an overhead wire illuminated by a simulated nuclear electromagnetic pulse (NEMP) was experimentally investigated. The wire is 70 m long, 7 mm in diameter, and situated 5 m above the ground. It is located 20 m away from a hybrid-type EMP simulator. The simulator is a resistively loaded elliptical loop structure with its pulse generator located 20 m above the ground. The overhead wire is terminated with various combinations of short circuit, open circuit, and characteristic impedance at the two ends, and the current response is measured at one end and in the middle. The measured responses are compared with calculated values from available analytical models     

东北地区首套复合光纤架空地线通信系统

介绍了东北地区首套复合光纤架空地线光通信系统的系统构成,给出了OPGW的结构和技术指标,阐述了光通信线路的组成,并介绍了光电端机的特点和技术特性,最后进行了讨论。     

Influence of a lossy ground on lightning-induced voltages onoverhead lines

A comprehensive study on the effect of a lossy ground on the induced voltages on overhead power lines by a nearby lightning strike is presented. The ground conductivity plays a role in both the evaluation of the lightning radiated fields and of the line parameters. To be calculated by means of a rigorous theory, both fields and line constants need important computation time, which, for the problem of interest, is still prohibitive. The aim of this paper is to discuss and analyze the various simplified approaches and techniques that have been proposed for the calculation of the fields and the line constants when the ground cannot be assumed as a perfectly conducting plane. Regarding the radiated electromagnetic field, it is shown that the horizontal electric field, the component which is most affected by the ground finite conductivity, can be calculated in an accurate way using the Cooray-Rubinstein simplified formula. The presence of an imperfectly conducting ground is included in the coupling equations by means of two additional terms: the longitudinal ground impedance and the transverse ground admittance, which are both frequency-dependent. The latter can generally be neglected for typical overhead lines, due to its small contribution to the overall transverse admittance of the line. Regarding the ground impedance, a comparison between several simplified expressions used in the literature is presented and the validity limits of these expressions are established. It is also shown that for typical overhead lines the wire impedance can be neglected as regard to the ground impedance