海底电缆综合监测关键技术及应用

摘要

Submarine cable is an important passage of cross-sea power delivery. Due to the lack of effective monitoring technology, the power failure and fault of submarine cable usually occur. In this paper, the submarine cable compound optical fiber is used as the sensing element to build a submarine cable integrated monitoring system. The system can moditor the operation state of submarine cabel in real-time. The technical principles of Brillouin scattering on the strain and temperature and the principles of Rayleigh scattering on vibration sensitivity are introduced. The operation temperature, strain state and vibration of submarine cable can be monitored. The results can support the stable operation of the cross-sea power grid. The research results have been getting markable effect in practice and have wide prospect in application.%跨海电网海底电缆由于缺乏有效的技术监测手段,导致海底电缆故障及停电事故时有发生.通过抽取海底电缆复合光纤作为分布式监测的传感元件,构建了海底电缆综合监测系统,实现对海底电缆运行状态实时在线监测,取得多项关键技术突破.重点介绍了利用光纤拉曼散射、布里渊散射和瑞利散射分别对温度、应变和振动特性反应敏感的技术原理,以及实现对海底电缆运行的温度、应变状态和振动事件进行分布式综合监测的技术成果,支撑了跨海电网安全稳定运行.该技术在实际应用中取得了显著效果,并且经济和社会效益突出,具有进一步推广应用的前景.