Information stream control method and system for improving relay protection reliability of intelligent substation

Abstract

The invention relates to an information stream control method and system for improving the relay protection reliability of an intelligent substation. The information system control system comprises a message capturing module, a characteristic quantity analysis module and a fault mode identification module which are connected in sequence by a data line, wherein the characteristic quantity analysis module is further externally connected with a database module, the fault mode identification module is externally connected with a characteristic quantity fixed value setting module and the database module, and the fault mode identification module respectively outputs a control module and an alarm module. According to the information stream control method and system disclosed by the invention, control measures can be taken by judging a fault mode of a process level network information stream in accordance with different mode information, improvement of the transmission reliability of the process level network information stream is facilitated, furthermore, various performances of relay protection equipment of the intelligent substation are improved, the automation level of a secondary system is improved and favorable terms are provided for safety operation of the intelligent substation.

Description

technical field [0001] The invention relates to an information flow control system capable of improving the reliability of intelligent substation relay protection. The invention also relates to an information flow control method which can improve the reliability of the relay protection of the intelligent substation by adopting the control system. Background technique [0002] Power system relay protection has four requirements of selectivity, quick action, sensitivity and reliability. After the reform of microcomputer protection, the performance of relay protection has been greatly improved. The protection and control of primary equipment is realized through information exchange between secondary equipment. At this time, a flow with the function of carrying information appears - information flow. In the microcomputer protection mode, the cable hard link method is used to connect the devices that need to exchange information flow. Each information flow has its own channel, ...

AI Technical Summary

Problems solved by technology

[0012] However, the existing technology has two major shortcomings: one is that it only provides a control strategy in the case of excessive traffic, and it cannot take corresponding measures for other abnormal states; the other is that this control strategy is to deal with communication Ethernet. The main application object is not the smart substation, so the proposed control strategy lacks pertinence and cannot fully meet the control requirements of the substation process layer network information flow.

[0015] The shortcoming of prior art 2 is: the function of the network message analyzer in the network is limited to recording and analyzing messages, and does not make judgments and implement controls for different network conditions, so its effect on the reliability of relay protection is An open-loop process, which is not conducive to the improvement of reliability

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