Device for achieving electric power system data self-adapting compression and method thereof

Abstract

The invention relates to a device for achieving electric power system data self-adapting compression and a method thereof, wherein, the device comprises an equiphase sampling unit and a compression unit, analog signals is connected with the input end of the equiphase sampling unit, and the output end of the equiphase sampling unit is connected the compression unit; and the method comprises the following steps: 1. a compressor input sequence is obtained by conducting synchronous equiphase sampling on the input signals; 2. and then the compressor input sequence is subjeced to equiphase point sequence compression. The Signal-to-Noise by adopting the equiphase sampling method of the invention is obviously higher than that adopting uniformly-spaced sampling, and with the increasing of the compression ratio, the Signal-to-Noise adopting uniformly-spaced sampling is minished quickly, but the Signal-to-Noise adopting the equiphase sampling method of the invention is minished relatively slowly, thereby the equiphase sampling data can realize big compression ratio and effectively and stably improve the communication bandwidth of the electric power communications system.

Description

【Technical field】 [0001] The invention relates to data sampling and data compression technology of a power line communication system, in particular to a device and method for realizing self-adaptive compression of power system data. 【Background technique】 [0002] With the improvement of power system automation and the continuous improvement of monitoring information system and distributed control system, people pay more and more attention to the storage of massive process data. These data contain a wealth of information, which is of great significance for analyzing the operating state of the power grid, providing control and optimization strategies, fault diagnosis, knowledge discovery and data mining. However, due to the huge amount of data, it is unrealistic to preserve the data in the form of prototypes for a long time. Therefore, it is an urgent need for the power industry to study data compression methods suitable for engineering practice and reduce redundancy in massi...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art under the action of power disturbance and equipment failure, the frequency of the actual power grid signal usually fluctuates around the rated frequency, which will lead to the coupling between the periodic data cycles and the information in the cycle of equal interval sampling, thus As a result, the numerical fluctuation between cycles increases sharply, and the non-integral cycle sampling caused by equal interval sampling also makes the numerical value between cycles appear periodic, which will limit the improvement of data compression multiples, thus affecting the improvement of communication bandwidth. These technical problems , the present invention provides a device and method for realizing self-adaptive compression of power system data

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