With the continuous development of HVDC power transmission technology

the AC and DC hybrid systems based on underground pipe corridors have been widely used. On the one hand

the operation scale of of the smart grid is expanded and

on the other hand

higher requirements are also raised for the monitoring of reliability of the equipment in the pipe gallery. In view of the issues of harsh operating environment in the pipe corridor of the AC/DC hybrid system and likely occurrence of serious safety accident

the multi-source information fusion monitoring system for the state monitoring and operation assessment in pipe corridor of AC/DC hybrid system is set up in this paper

the multi-source parameters of the import position of the AC/DC hybrid system in the pipe corridor is subjected to the digitization and intelligent treatment

the key information is extracted and the the operation state of the system is analyzed and assessed on the basis of the multi-source information fusion algorithm. The monitoring system

in case of abnormal operation of the AC/DC hybrid system in the pipe corridor

can be able to achieve fast response so as to assure the long-term and stable operation of the AC/DC hybrid system in the pipe corridor.