A Implementation Method of Sampling Value Frame Decoding Based on Gigabit Network

Abstract

The invention discloses a gigabit network-based sampling value frame decoding implementation method. The method comprises the steps of acquiring multiple channels of sampling value frame messages from the internet through the sampling value frame data input interface of equipment, respectively analyzing the contents of the sampling value frame messages according to the multi-channel sampling value frame configuration content, figuring out the value data of sampling channels corresponding to matched sampling channels, storing corresponding sampling data in a cache region when sampling value frame data are complete and outputting sampling data to a CPU through an asynchronous bus for further data treatment. According to the technical scheme of the invention, the method can be applied to an intelligent substation, and provides an effective solution scheme for the frame fast matching of mass sampling value and the rapidly speculative parsing and processing of message data based on the current networking transmission. Meanwhile, the bandwidth requirements of data processing and the data processing amount of the CPU of the equipment are effectively reduced, and the operation stability of the equipment is improved.

Description

technical field [0001] The invention relates to a gigabit network-based sampling value frame decoding implementation method, which belongs to the technical field of electric power system intelligent substations. Background technique [0002] According to the description and requirements of the IEC 61850 substation communication network and system standard, the equipment of the intelligent substation integrated automation system is arranged in three layers according to its functions: process layer, interval layer, and station control layer. In the long run, the substation network structure will be gradually improved in three stages, namely, point-to-point mode, process layer bus mode, process bus and station control layer bus merger, that is, "three networks in one" mode. [0003] When point-to-point transmission of sampling values ​​is adopted, the output of the merging unit is directly connected to the protection measurement and control device through optical fiber point-to...

AI Technical Summary

Problems solved by technology

The disadvantages are: the number of sampling interfaces required by the protection measurement and control device and the merging unit is relatively large, and the hardware design of the device is more complicated

The disadvantage is: the merging unit, protection measurement and control device and other equipment must be synchronized; when global synchronization is adopted, the merging unit always sends a large amount of data to the switch at the same time, and the instantaneous flow of the switch is huge, which may be unfavorable to the reliability and stability of the switch Impact

Calculated based on the maximum access to 16 channels of sampling value frames, the secondary device needs to process about 32M bytes / s of data traffic, which will occupy most of the processing resources of the main CPU or exceed the processing capacity of the general main CPU, seriously affecting the secondary device performance

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