OPGW腐蚀部位检测技术

Technique for Detecting Corrosion Part of OPGW

合成光纤地线(OPGW)具有由于光纤管子腐蚀造成通讯失效的风险。日本东京电力有限公司发明了一种光时域反射测量仪(OTDR),可以测量出运行的OPGW腐蚀部位产生的氢引起的信号丢失。在此发现的基础上,该公司还开发出1种检测OPGW腐蚀部位的方法。在已发生通讯失效的输电线路上采用此方法可以准确地检测出已腐蚀的部位,从而可以制定有效的维护计划,而不会漏掉所有需要维修或替换的部件。此方法也可以作为预防维护的手段。例如,此方法也可以用于天气恶劣区域输电线路的OPGW定期监测,以便在腐蚀造成通讯失效前检测出腐蚀信号。

Composite Fiber-Optic Ground Wire （OPGW） has a risk that communication faults may be caused by corrosion of their pipes. We have discovered the signal losses caused by the hydrogen generated by the corrosion of installed OPGW can be measured by means of an Optical Time Domain Reflectometer （OTDR）. And we have developed, based on this finding, a method to detect corroded parts of OPGW. The use of this method on a transmission llne in which a communication fault has occurred allows corroded parts to be detected accurately and thus allows an effective maintenance plan to be developed which does not overlook any part that requires repair or replacement. This method is also useful as a mean of preventive maintenance. For example, this method can be used for regular monitoring of OPGW in healthy transmission lines and to detect signs of corrosion before the corrosion causes a communication fault.