Multi-level subqueue layered dispatching method for messages in communication network of transformer substation

Abstract

The invention discloses a multi-level subqueue layered dispatching method for messages in the communication network of a transformer substation. The method comprises the steps of 1, receiving the messages by a receiver; 2, analyzing the messages by a data analysis module and a label analysis module to obtain information, such as message contents, labels, destination addresses, VLAN (virtual local area network) values and message types; 3, testing whether the time to live TTL is greater than 0 or not, if the TTL is equal to 0, discarding the messages and finishing the process, and if the TTL is greater than 0, continuing the next step; 4, searching an MAC table according to the destination addresses and the VLAN values of the messages, and sending the messages to the corresponding ports; 5, identifying the message types according to the information of a message label tagged value field, and mapping different messages to a label-based multi-level subqueue for queuing up to be sent; 6, when one message reaches the head end of the queue, adding a new label to the current message by a label packaging module, packaging the current message by a data packaging module, and sending the current message to the next switch by a sender for finishing the forwarding process. The problems of delay variation, transmission delay and the like in message switching is well solved, and the real-time reliability of information transmission of the transformer substation is improved.

Description

technical field [0001] The invention relates to a substation communication network switching technology, in particular to a multi-level sub-queue hierarchical scheduling method for messages in a substation communication network. Background technique [0002] The real-time reliability of information flow in substation communication network is an important index to evaluate the performance of smart substation communication network. SV messages and GOOSE messages are used as the carriers for relay protection, monitoring and other application systems, and their real-time reliability directly determines the effectiveness of power system protection and control decisions. Therefore, improving the real-time reliability transmission of information flow is the guarantee for the safe, stable and reliable operation of the substation automation system. [0003] As shown in Table 1, IEC61850 has strict and detailed regulations on the performance of substation automation system messages. ...

AI Technical Summary

Problems solved by technology

[0008] 1) The switch port recognizes the priority of the message, but cannot identify the message type (SV, GOOSE or MMS) and the service connotation (protection or measurement and control);

[0009] 2) Due to the coarse granularity of packet classification (SV / GOOSE / MMS) and the lack of ability to identify packets, packets can only be simply scheduled according to the priority level, and resources cannot be finely allocated to various types of packets according to real-time performance requirements. Hierarchical scheduling of packets;

[0010] 3) Lack of analysis ability for packets flowing through the port, unable to identify, eliminate and control disturbance packets such as error packets and burst packets

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