Method for realizing dual-network redundancy of protection device on the basis of PRP parallel redundancy

Abstract

The invention relates to a method for realizing dual-network redundancy of a protection device on the basis of PRP parallel redundancy, and belongs to the technical field of relay protection automation in electric power engineering. According to the method, redundancy is realized through a data link layer instead of an application layer, messages are received on two networks and are all transmitted to the data link layer, the data link layer extracts the frame of message received first, drops the repeated frame of the message and then only sends the frame of the message which is obtained after redundancy processing; the application layer only sends one frame of the message in the sending process, and the frame of the message is issued level by level; when reaching the data link layer, the frame of the message is copied, the frame of the message and the copy are sent to the two networks at the same time, and therefore dual redundancy is realized at the data link layer. The method realizes redundancy of network communication of the protection device on the basis of PRP parallel redundancy, is high in processing efficiency, can realize seamless switching and can greatly improve communication quality of the networks of the protection device in a transformer substation.

Description

technical field [0001] The invention relates to a dual-network redundancy realization method based on a PRP parallel redundancy protection device, and belongs to the technical field of relay protection automation in electric power engineering. Background technique [0002] At present, in substation design, the dual-network redundancy solution for traditional protection devices can only target a certain communication protocol and a specific network topology, such as figure 1 As shown, the current dual-network redundancy implementation method of the protection device, in the parallel network, the protection device has two network cards, and receives messages from the dual-network at the same time, and the message is transmitted from the physical layer to the upper level. All messages are transmitted to the application layer, and then redundant processing is performed at the application layer, and filtering is performed according to time stamps or other message representations,...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a dual-network redundancy implementation method based on PRP parallel redundant protection devices, so as to solve the problem that the current protection devices implement redundancy by parsing message filtering time stamps at the application layer, resulting in low processing efficiency and poor security The problem

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