Abstract: Abstract:A fault diagnosis system for distributed system based on integrated information platform of intelligent substation was proposed. The diagnosis system mainly composed of the alarm receiving and processing module and the online fault diagnosis module. The alarm processing module will capture the signal of GOOSE (general objectoriented substation event) from the GOOSE network, but does not read traditional SCADA (supervisory control and data acquisition) information. The system fault diagnosis, which was implemented in dispatch side traditionally, will be divided into a series of single substationbased fault diagnosis, and the latter will be implemented in relevant substation. In each substation, using the system configuration description file (SCD) provided by the information platform, the system fault diagnosis analytical model will be established. The examples show that the diagnosis method has advantages of high speed and accuracy and can meet the requirement of online application.

Key words: Key words:intelligent substation, IEC 61850, fault diagnosis, distributed, uncertainty