The Research On Power System Fault Diagnosis Method Considering The Information Uncertainty

The existing fault diagnosis methods are facing a defect that their practicality is poor especially when mistake appears in remote signalling. To solve this defect a new type method is proposed in this paper by combing the expert system with information theory. When there is only one SCADA data source, an information transmission model of fault diagnosis based on the actual channel is established. All kinds of uncertainties are quantitatively described. The uncertainty is mainly caused by power system fault and information transmission mistake.The method inherits mature and practical characteristics of expert system fault diagnosis, and simplifies the fault analysis, so it is beneficial to realize on-line fault diagnosis. The examples show that this method can solve the problem of information ambiguity and the uncertainty in actual communication. Even when a large interference appears in remote channel, it also can output the reasonable diagnosis results.