Network storm inhibition method in process layer of intelligent transformer station

Abstract

The invention discloses a network storm inhibition method in a process layer of an intelligent transformer station. The method is characterized by comprising steps that: 1), MAC address filtering is carried out; 2), mass-flow broadcast message inhibition is carried out; 3), DMA0 and DMA1 having different priorities are used according to an SV message and a GOOSE message, and different strategies are employed for the DMA0 and the DMA1 to realize move of network data from an MAC cache region into a processor; 4), according to a third part message, move from the MAC cache region to an external memory is carried out by utilizing the DMA; and 5), according to a GOOSE storm, an in-band fixed storm and a change storm, types and characteristics of the storms can be automatically identified, and specific storm inhibition is carried out to reduce network pressure of a network port without influence exerted on normal message processing. According to the method, the broadcast storm, the out-band multicast storm and the in-band multicast storm are effectively inhibited, and correct and reliable operation of the device are guaranteed.

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...

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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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