An intelligent substation process layer physical link fault diagnosis method

Abstract

The invention discloses an intelligent substation process layer physical link fault diagnosis method, and relates to the field of intelligent substations. The method comprises the steps of analyzing an SCD file, and obtaining related information of a logic link of a process layer of a whole station and switch configuration information; Obtaining a path node set of a whole station process layer logic link; Analyzing the chain scission signal, obtaining information related to the chain scission signal, and preliminarily screening out a path node set possibly having problems based on the information; Traversing other non-triggered chain scission signals; based on process layer message information related to the triggered chain scission signal, combining with network message analysis; path nodes possibly having problems are further eliminated based on the starting point port power information, the end point port power information and other means of the logic link related to the triggered broken link signal, and the rest path node sets are ranked according to the probability to obtain a final diagnosis result. On the basis of probability statistics, the fault diagnosis range is furtherreduced, and the positioning accuracy is enhanced.

Description

technical field [0001] The invention relates to the field of intelligent substations, in particular to a method for diagnosing physical link faults in process layers of intelligent substations in combination with network message analysis and device status monitoring. Background technique [0002] A new generation of smart substations based on IEC61850 has been put into production and use in large quantities. Compared with traditional conventional substations, the information transmission mode of smart substations has changed from electrical signals to digital signals, and its information transmission medium has also changed from cables to optical cables. The transformation of the two places new demands on the operation and maintenance of substations. Among them, the substation accidents caused by communication problems in the process layer emerge in an endless stream, which poses a great threat to the safe and stable operation of the power grid. The main reasons are as fol...

AI Technical Summary

Problems solved by technology

Among them, the substation accidents caused by communication problems at the process level emerge in endlessly, which poses a great threat to the safe and stable operation of the power grid.

The reasons are mainly in the following aspects: First, the secondary circuit is blurred, invisible and intangible, and it is impossible to complete the troubleshooting of corresponding problems through traditional contact or naked-eye means such as voltage measurement

Second, optical fiber, switches and other process-level information transmission and transfer equipment often contain multiple logical links and secondary circuits, and their failure will generally lead to abnormalities in multiple protection devices related to them.

Manual checking and positioning is error-prone and time-consuming

Third, limited by the independent operation of the network analysis equipment of the smart substation, the conclusion of the physical link diagnosis of the process layer of the smart substation based on probability statistics still needs to be further judged and positioned by the person through the message monitoring situation of the network analysis equipment and other means

This undoubtedly increases the time to eliminate such defects in smart substations

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