Intelligent substation network topology step-by-step sniffing method based on LLDP protocol

Abstract

The invention discloses an intelligent substation network topology step-by-step sniffing method based on an LLDP protocol. The LLDP protocol is expanded, a switch transmits the detected primary neighbor topology information to the primary neighbor and receives neighbor topology information diffused by the primary neighbor so as to update the local network topology which can be detected by itself and then continues to diffuse the local network topology detected by itself to the primary neighbor through the extended LLDP protocol and the rest can be done as the same manner until the obtained primary neighbor topology information is not updated any more. Finally, each switch in the intelligent substation network can obtain the network topology information of the whole station and the positionof the switch in the intelligent substation network. The method provides an effective operation and maintenance means for dynamic network topology detection of the intelligent substation, network fault positioning by taking the switch as an interface and the like.

Description

technical field [0001] The invention specifically relates to an LLDP protocol-based intelligent substation network topology level-by-level sniffing method, which belongs to the technical field of power system automation. Background technique [0002] Smart substation communication network is the key to transfer and exchange substation station control layer, bay layer and process layer data. Currently common smart substations can rely on Link Layer Discovery Protocol (LLDP) in terms of collecting dynamic network topology information. The link layer discovery protocol is a common protocol used to detect network neighbor information. This protocol can only detect network devices directly connected to the device. Without the cooperation of network management tools, it cannot perceive the topology of the entire network. Therefore, for smart substations, there is a lack of effective operation and maintenance methods when only relying on the traditional link layer discovery protoc...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a step-by-step sniffing method for the network topology of intelligent substations based on the LLDP protocol, and to solve the problem that the current intelligent substations lack the dynamic detection means of the network topology of the whole station

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