An online fault analysis method for smart substations

Abstract

The invention relates to an online fault analysis method of an intelligent substation, which performs real-time analysis and processing of multi-source alarm information at the station end, analyzes the effectiveness of signal actions through time constraints, and reads fault instances associated with effective signals for fault matching, matching Criterion includes full signal action and signal action logic, combined with the fault record file generated when the protection action signal occurs, the false alarm degree analysis of the fault is carried out, and finally a comprehensive comprehensive coverage of fault data, fault instances, troubleshooting strategies, and fault false alarm degree is formed. Comprehensive failure briefings such as information, etc., and transmit the briefing data to the dispatching center through the dispatching data network. The method proposed by the invention can effectively extract action signals, improve the analysis value of data, improve the comprehensiveness of alarm information, remove false alarms in the station, improve the accuracy of alarms, increase system reliability, reduce the difficulty of fault handling by operators, and save fault processing time.

Description

technical field [0001] The invention belongs to the technical field of power system substation automation, in particular to an online fault analysis method for an intelligent substation. Background technique [0002] At present, my country's power system is in a period of rapid development. With the advancement of the construction of intelligent substations and the continuous improvement of the automation level of substations, the information collected by the station is increasingly rich. However, the station usually only uploads important information to the dispatch center in real time, lacking preprocessing and pre-analysis, resulting in incomplete and incomplete information uploaded, which affects the accuracy of fault judgment of the dispatch automation master station system. At present, the power grid dispatching center adopts a centralized monitoring, analysis and control mode, while some systems still upload information in a polling method, which is slow and has poor ...

AI Technical Summary

Problems solved by technology

However, the station usually only sends important information to the dispatching center in real time, lacking preprocessing and pre-analysis, resulting in incomplete and incomplete information, which affects the accuracy of fault judgment of the dispatching automation master station system

The current power grid dispatching center adopts a centralized monitoring, analysis, and control mode, while some systems still use polling to upload information, which is slow and has poor real-time performance.

When a fault occurs, dispatching and operating personnel can only rely on the SCADA system to obtain real-time information, and with the assistance of relay protection professionals, use the wave recording information provided by the fault recording system to conduct comprehensive fault research and judgment. slow speed problem

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