A network storm suppression method in the process layer of smart substation

Abstract

The invention discloses a network storm suppression method in the process layer of an intelligent substation, which is characterized in that it includes the following steps: 1): MAC address filtering; 2): large-flow broadcast message suppression; 3): for SV messages and GOOSE messages use DMA0 and DMA1 with different priorities, and use different control strategies for DMA0 and DMA1 to realize the movement of network data from the MAC buffer area to the processor chip; 4): For third-party messages, use DMA from the MAC The cache area is moved to the off-chip memory; 5): For GOOSE storms, for in-band fixed storms and variable storms, automatically identify the types and characteristics of storms, and suppress the storms in a targeted manner to reduce the network pressure of the network port while not Normal packet processing is affected. The method effectively suppresses the broadcast storm, the out-of-band multicast storm and the in-band multicast storm, and ensures correct and reliable operation of the device.

Description

technical field [0001] The invention relates to a method for suppressing network storms in the process layer of an intelligent substation. Background technique [0002] The process layer network is a unique network layer in smart substations. The process layer is used to complete real-time electrical quantity detection of power operation, state parameter detection of operating equipment, operation control execution and drive. The main application data of the process layer are SV messages, GOOSE message data and network management services. Among them, the sampling data (SV message), switch status and export control data (GOOSE message) of the device are all transmitted through the process layer network, which requires that the devices of the smart substation can respond to the subscribed process layer network report in real time at any time. Text and send subscribed messages in a timely and stable manner. [0003] The smart substation device has a large number of network p...

AI Technical Summary

Problems solved by technology

[0003] The smart substation device has a large number of network ports connected to other devices or switches at the process layer. Due to the blockage of the switch, it may cause recurrent network storms, or a device connected to a network port of the device fails to send a large number of network messages. As a result, other network ports of this device cannot correctly respond to the correct messages of related devices

At present, on the network port of the process layer, the impact of broadcast storms on devices can be reduced by shielding broadcast messages. Some technologies have realized the suppression of broadcast storms, out-of-band multicast storms, and in-band repeated multicast storms. , but there is no suppression method for the continuously changing in-band multicast storm

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