Abstract: The safety monitoring of existing ultra-high voltage direct current（UHVDC）converter stations

mostly adopts manual on-site detection，which presents major safety hazards and high labor costs. In order to meet

the safety needs of the power transmission system，a multi-angle joint monitoring system was designed for UHVDC

converter station based on long range radio（LoRa）technology. The monitoring module conducted multi-angle joint monitoring of important systems of the converter station，and used LoRa wireless transmission technology for

communication and transmission. Experimental results show that the program has high monitoring data accuracy，

low power consumption，and long transmission distance，which improves the intelligent level of wireless monitoring and management of the converter station.

      Key words: long range radio（LoRa）technology；monitoring system；communication transmission