Abstract: Based on multi-source information,a real-time comprehensive analysis method for faults in power grid is presented.The power grid fault information acquired by the power dispatching data platform from the energy management system（EMS）,the relay information system and the fault recording system is used.According to the data acquisition characteristics of different sources,a stage-by-stage fault diagnosing method is adopted to analyze the multi-source and multi-type information by stages.And a fault information group technology is presented to solve the problem of information sharing and process coordination among those independent analytic sub-systems.The real-time comprehensive analysis of power grid fault is realized for the concurrent running of multi-source information and multi-algorithm,with an improvement in the relevance and efficiency of analysis and data acquisition.The proposed approach has been successfully applied in Fujian Dispatching and Communication Center.Field running results show that the proposed method is capable of realizing fast,complete and correct comprehensive fault analysis for multi-source information and accurately evaluating the action of relays and breakers.