With the development of intelligent information technology

the internal structure of the power system has also undergone significant changes

and intelligent substations have been widely promoted and used. In intelligent substations

relay protection technology is crucial and can significantly improve the safety and reliability of substation operation

which needs to be given sufficient attention. Based on the development status and operational characteristics of intelligent substations in the power system

combined with the current industry practice environment

this paper discusses several commonly used relay protection technologies

explores measures to improve the reliability of relay protection technology in intelligent substations

in order to promote the safe operation of intelligent substation and promote the efficient and stable operation of power system.