The invention relates to an intelligent substation online
fault analysis method. The intelligent substation online
fault analysis method comprises the steps of: performing real-time analytical
processing on multi-source alarm information at a
station end; analyzing
signal action validity according to time constraint conditions; reading a fault instance associated with a valid
signal for fault matching, wherein matching criteria comprises
signal full action and signal action logics; combining with a fault recording file generated when a protective action signal is produced; performing
false alarm degree analysis of the fault, and finally forming a comprehensive fault briefing comprehensively covering information such as fault data, fault instance,
troubleshooting strategy and
false alarm degree; and transmitting briefing data to a scheduling center. The intelligent substation online
fault analysis method disclosed by the invention can effectively extract action signals, improve the analysis value of the data, improve the comprehensiveness of the alarm information, remove the false alarms in the
station, improve the alarm precision, improve the
system reliability, reduce the
troubleshooting difficulty of the operation personnel, and save the
troubleshooting time.