长兴岛110kV海缆在线测温技术应用

Application of On-line Temperature Measuring Technology on Changxingdao 110 kV Submarine Cable

长兴岛110 kV海缆长期处于高负荷状态,为进一步提高海缆实时监测水平,采用分布式光纤测温系统对长兴站内110 kV两回海缆排管段进行在线监测。系统具备获取实时温度和实时电流,完成海缆排管段缆芯温度的计算、预报警及动态载流量计算的功能。分布式测温系统运行后,有效提高了海缆在线监测水平,为调度部门在用电高峰期载流量调度提供了依据。

The submarine cable of Changxingdao 110 kV was at the long load states for a high time.In order to further improve the real-time monitoring level of the submarine cable,the distributed fiber temperature measurement system was used for on-line monitoring the Changxingdao 110 kV two-return submarine cables pipe-arrangement section.The system have the functions of obtaining the real time temperature and current,completing the calculation of the submarine cables pipe-arrangement cable core temperature,pre-warning and the calculating the dynamic current carrying capacity.After the operation of the distributed temperature measurement system,the submarine cable on-line monitoring level was effectively improved which provided the reference for the dispatch department to dispatch the current carrying capacity at electricity load peak.