Overview of Changchun tunnel project

The West Cable Tunnel of Changyi substation is 305 meters long, which was completed and put into operation in 2013. There are 12 times of 66kV cables in the tunnel, and it is classified as grade I channel according to the high voltage cable channel of State Grid Corporation.

At present, there are automatic fire alarm system, fan and water pump control system, sheath circulation detection system, distributed optical fiber temperature measurement system, tunnel environmental gas detection system, etc. in the tunnel. However, due to the technical limitations at that time, the equipment of each system is scattered and seriously aged, which has been unable to meet the requirements of the state grid operation and inspection department on strengthening the management of cable body and environmental monitoring device in the tunnel As required by the notice (YJ2 [2017] No. 105).

In view of the relevant problems existing in the West Cable Tunnel of Changyi substation at present, according to the relevant technical development specifications of the ubiquitous Internet of things, the corresponding intelligent reconstruction and construction scheme of the tunnel is formulated. Advanced technology and equipment are used to build a high-level integrated monitoring system to realize the intelligent construction and application of the tunnel, so as to meet the development outline of the ubiquitous power Internet of things.

The overall construction content of the project includes: station control level cable status monitoring sub station, cable tunnel inner well cover status monitoring and remote opening control application system, cable tunnel and opening and closing station access control security management application system, power tunnel intelligent video analysis alarm application system, tunnel mobile phone signal coverage system, power tunnel environment monitoring level equipment automation control application system , automatic fire alarm and fire fighting linkage system, DTS distributed optical fiber temperature measurement system, high-voltage cable line fault detection and patrol application system.