Switch based process level network message analysis method

Abstract

A switch based process level network message analysis method comprises adding an FPGA (Field Programmable Gate Array) chip to an interface board based on the industrial switch software and hardware used by the existing digital substation; adding the FPGA chip between an external signal interface chip namely a PHY (physical layer) and a switch chip on the interface board and enabling PHY chips to be added to bilateral sides of every channel of the FPGA; enabling message or data to enter into the PHY through RJ45 or an optical port interface during the actual data transmission process and enabling the data to enter into the FPGA chip through an MII (Media Independent Interface); analyzing entered message or data through the FPGA chip, analyzing a message heater of the message and accordingly judging which kind of message the message belongs; performing right and wrong judgment on the message aiming at specific type message. Protection fault action or action rejection and the like can be caused due to conditions that the message during network transmission is wrong and the like, so that monitoring and diagnosing that whether the message transmitted in the network is wrong or not are very important.

Description

Technical field [0001] The invention belongs to the field of communication in the electric power system, and the application of data acquisition of a switch. Background technique [0002] In the digital substation, a network communication system composed of a large number of switched Ethernet and optical cables replaces the traditional secondary connection cables and circuits. The process layer, bay layer, and substation layer are all communicated according to the IEC61850 standard protocol. In the networking mode of switch networking, a large number of SMV sampling messages and GOOSE messages are transmitted through the switch. The correctness of the messages directly affects whether the protection equipment in the station will malfunction or refuse to operate. Under normal circumstances, the network data flow in the station is relatively stable, and there will be no sudden increase or decrease in the flow. When the merge unit and the like are abnormal, the instantaneous flow of...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the network data flow in the station is relatively stable, and there will be no sudden increase or decrease in the flow rate. When an abnormality occurs in the merging unit or the like, the instantaneous flow rate of the packets transmitted in the switch may decrease or increase suddenly, resulting in the protection function being affected. influences

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