Abstract
The increase in size of the current electric power systems has led to the development of monitoring techniques that includes online and offline analysis. One of the most common offline techniques is the disturbance records systems, based on oscillographic records, generated by Digital Fault Recorders and allow the analysis of the electrical quantities and logical signal (from protection devices). Generally, in power plants, all the data are centralized in the utility data center and this results in an excess of data that difficults the task of analysis by the specialist engineers. This paper shows a methodology for automatic analysis of disturbances in power plants based on fuzzy reasoning. The objective of the system is to help the engineer responsible for the analysis of the records by means of a pre-classification of data and also, diagnose the relevant occurrences.
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