5.8 GHz光纤融合通信在输电线路监测系统中的应用

doi:10.11959/j.issn.1000-0801.2016201

Abstract

Abstract:

When in the depths of the mountains,2G/3G signal is weak or don't exist,or when the high definition video is needed,2G/3G couldn't meet requirements of such high bandwidth,so that communication is intermittent or interrupt,resulting in the condition monitoring data is difficult to transmit reliably to the master station.To solve this problem,2G/3G+5.8 GHz or 5.8 GHz +OPGW converged communication mode was proposed,the signal could be switched automatically to the 5.8 GHz communication mode,and transmits back to the master station after converging the main line and OPGW.Based on the optical fiber converged communication,the transmission line monitoring system and work flow were designed and the application example and the future development prospect were given finally.

Key words: transmission line monitoring, 2G/3G communication, 5.8 GHz communication, OPGW, converged communication, switching process

Jie TONG,Yanli LIU,Delong YANG,Hongli LUO,Huan WANG. Application of 5.8 GHz optical fiber converged communication in transmission line monitoring system[J]. Telecommunications Science, 2016, 32(7): 166-174.

Figures/Tables 9

对比项目	光纤方式	2G/3G无线公网	5.8 GHz无线专网	对比分析
系统带宽	光纤通信方式包括EPON、SDH等，每个节点可以获得2 Mbit/s 左右的带宽，最大可以达到30 Mbit/s	上行带宽小，2G 网络带宽为56～114 kbit/s,3G网络带宽为100～200 kbit/s	点到多点模式，每个节点可以提供2～5 Mbit/s带宽；点到点的模式，最大带宽为300 Mbit/s	光纤方式提供带宽最大，5.8 GHz无线专网次之，2G/3G无线公网最小；2G/3G方式带宽有限，不支持图像传输；其他带宽符合图像传输要求
系统实时性	系统时延较低、实时性高	需要与运营商IP网络网关转换，系统时延大于秒级	系统时延小（通常为5ms）、效率高	光纤方式和无线专网有较高的实时性，2G/3G方式实时性较差
系统可靠性	需选择工业级产品，系统可靠性高	需选择工业级模块，比民用代价大，但网络本身是面向民用级	本身符合工业级需求，具备野外特性，可靠性好	都需要采用工业级产品，符合电力高可靠性的需求
系统安全性	电网有线内网，安全性高	运营商提供网络，安全性差	无线内网，无线数据有特殊编码、封装和加密，安全性高	公网方式需考虑通信安全问题光纤专网，5.8 GHz 无线专网安全性高
系统可用性	系统可用性强，稳定可靠	覆盖取决于运营商建设；有信号盲区；会受到恶劣气候、树木遮掩、电磁波的干扰	会受到恶劣气候、树木遮掩、电磁波的干扰，需从调制方式、天线、规划等方面进行优化设计	光纤系统可用性最高；无线方式均存在天气、遮挡、电磁波的干扰；需要选用先进的调制方式、天线方式提升可用性
系统抗干扰性	光纤系统抗干扰性强	抗干扰性一般；本身为民用系统，完全取决于运营商	物理层采用 OFDM、收发分集和自适应调制等多种先进技术实现非视距传输^[2]	光纤系统抗干扰性最高；无线公网完全取决于运营商；5.8 GHz无线专网可以采用先进的调制技术提高抗扰性
系统施工难度	需要施工光缆；不建议频繁将OPGW光缆开口；OPGW、ADSS施工都有完善的施工规范	无线设备，无需光缆，施工代价低	无线设备，无需光缆，施工代价低	OPGW 在短距离内，不应频繁开口；无线方式施工方便
系统成本	包括光缆成本、光缆施工成本、光纤通信设备成本	包括通信设备成本、安装、施工成本、租用运营商网络费用	包括无线专网设备价格，安装、施工成本	如需视频应用，无线公网后期费用最高，光纤前期费用最高
系统维护	光纤通信系统为电网自有网络，需要维护网络和设备	只考虑维护终端设备	系统为电网自有网络，需要维护设备，无线网络无需维护	公网方案所需维护量最小；无线方式需维护设备；光纤有线方式需维护设备和网络

References 9

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