Primary Fault Information Modeling and Identification for Grid Relay Protection and Fault Information System

As the basis of the grid relay protection and information system,the primary fault information modeling is put forward first,which consists of four hierarchical levels,the grid,substation,bay,and IED,with the IED level fault information model as the foundation.As for its parameter setting and correlation,by taking into account the relay protection and recording device's information output characteristics,the specific identifying method is proposed,which is applied in the power system of Zhejiang Province.