OPGW直流融冰过程对通信光纤的影响

Influence of DC Ice Melting Process of OPGW on Communication Optical Fiber

介绍了OPGW融冰的绝缘改造问题,确定最高融冰电流、最高温升、最长融冰时间等技术问题。虽然曾因经验不足,出现过OPGW被烧断、光纤衰减增加甚至断裂的情况。但经过几年的技术改进,以及实践证明,在允许的最高融冰电流、最高温升、最长融冰时间内进行融冰,对光纤信号传输影响较小,但实际融冰过程对光纤信号传输有什么影响还不明确。本文分析了OPGW直流融冰过程可能影响内部光纤传输的因素,包括温度影响,可能存在的脱冰张力影响。列举了某条线路融冰前、融冰过程、融冰后测量的光纤参数,分析了事件点损耗变化情况。通过总结分析,提出了一套用于研究OPGW直流融冰过程对通信光纤的影响研究的技术方案。

China Southern Power Grid has successively solved the insulation transformation of OPGW ice melting,and determined the technical problems such as the highest ice melting current,the highest temperature rise,and the longest ice melting time.Although the OPGW has been burnt out,fiber attenuation has increased or even broken due to lack of experience.However,after several years of technical improvement and practice,it has been proved that the maximum ice melting current,the maximum temperature rise and the maximum ice melting time have little impact on the optical fiber signal transmission,but the impact of the actual ice melting process on the optical fiber signal transmission is not clear.This paper analyzes the factors that may affect the internal optical fiber transmission in the process of DC melting of OPGW,including the influence of temperature and the possible deicing tension.The optical fiber parameters measured before,during and after the ice melting of a line are listed,and the loss change of event point is analyzed.Through summary and analysis,a set of technical scheme is put forward to study the influence of OPGW DC ice melting process on communication optical fiber.