光纤分布式传感技术在海底电缆状态监测中的应用

Application of Distributed Sensing Technology of Optical Fiber in Submarine Cable Status Monitoring

光电复合海底电缆能够实现电能和信号传输的双重功能,是海底电力电缆发展的必然趋势。海缆敷设环境特殊,运行过程中会受到洋流、船锚等因素的影响,因此,对海缆的机械特性和温度状况进行监测意义重大。通过分析光纤分2布式传感技术的特点,以及其在海底电缆状态监测中的应用情况,光纤分布式传感技术具有易植入、易组网、抗电磁干扰等优点,能够实现长距离的分布式监测。根据光纤散射原理及光时域反射技术可实现多种海缆故障的诊断,全方位地监测海缆运行状况,对多种可能发生的故障进行预警和定位。

As an inexorable development trend of submarine cable,photoelectric composite fiber can transmit both electric energy and signals.It is important to monitor mechanical properties and temperature of submarine cables due to the special laying condition and the influence of ocean current,anchors and other factors during the operation.This paper analyzes the characteristics of distributed sensing technology and its application of optical fiber in submarine cable status monitoring.The result shows that optical fiber distributed sensing technology has the advantage of easy implanting,easy networking and anti-electromagnetic interference,and can achieve remote distributed monitoring,which meets the need of submarine cable status monitoring.Based on the principle of optical fiber scattering and optical time-domain reflection technology,submarine cable faults can be diagnosed and the operation condition can be monitored all around to warn and locate various potential faults.