Integrated information platform is a key part in intelligent substation.The platform can simplify the data source of the substation

realize the sharing and interaction of information inside and outside the substation with a unified standard method

and form a consistent and unique basic data information.Aiming at the testing problems in the field of digital protection of intelligent substation

this paper realizes the application of power Internet of things integrated information platform in relay protection

and develops a set of relay protection automatic testing platform for intelligent substation.The platform can build a model in complex situations

which makes relay protection testing more intuitive and concise

and significantly improves the efficiency of relay protection testing.