A Collaborative Analysis Method of Multi-layer Protocol in Smart Substation Based on Information Data Link

Abstract

The invention discloses a multi-layer protocol collaborative analysis method of an intelligent substation based on an information data link, which includes real-time detection of an MMS message at a station control layer, judging whether a remote control switch operation occurs, and detection of a process layer network after a remote control switch operation occurs. GOOSE message to determine whether the remote control exit occurs, detect the remote control exit of the measurement and control device, detect the MMS message of the station control layer, and determine whether the switch displacement information occurs. The intelligent substation multi-layer protocol collaborative analysis method based on information data link of the present invention, compared with the prior art, realizes the whole process monitoring and comprehensive analysis from the station control layer to the process layer, and improves the positioning efficiency and accuracy of network faults It can effectively detect the correctness of the switch circuit of the substation, and provide auxiliary decision-making for the health evaluation of the relay protection device of the substation, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of power system operation and maintenance, in particular to an information data link-based multi-layer protocol collaborative analysis method for intelligent substations. Background technique [0002] The traditional operation and maintenance mode needs to arrange personnel to enter the station for inspection every day, and at the same time, it also needs to conduct regular inspections on the secondary equipment and its related secondary circuits. As the scale of the power grid expands, this inspection, inspection and maintenance method will require more manpower and funds. Traditional operation and maintenance and even special maintenance modes such as special maintenance are unsustainable, and hidden dangers of equipment cannot be found in time. [0003] At present, the online operation and maintenance management and control system has some applications in some pilot stations, mainly in the online status d...

AI Technical Summary

Problems solved by technology

Among them, the online detection of the secondary circuit of the relay protection detects the quality of the optical fiber circuit through the light intensity and broken link information, which cannot realize the detection of the cable circuit from the intelligent terminal to the switch, and does not judge the MMS message information of the station control layer.

[0004] An article "Research and Implementation of Key Technologies for Online Operation and Maintenance System of Smart Substation Relay Protection" published in Power System Automation Magazine in July 2016 pointed out that the online detection of the secondary circuit of relay protection includes physical link detection and logical link detection , where the physical link detection uses the logical nodes of LCCH and LPST to obtain the communication status of the physical link of the smart device and the switch, but only realizes the physical link status identification of the optical fiber loop; the logical link detection uses the online inspection message method, For example, there are errors such as message format error, message count error, message link disconnection, message and configuration inconsistency, etc., but the data (Data) field in the message is not verified, that is, an abnormal trip or abnormal Switch displacement cannot be detected

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