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Method and device for compressing three-phase voltage and current signal waveform sample data

A current signal, three-phase voltage technology

Inactive Publication Date: 2015-01-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The dictionary model compression algorithm in the power sampling data compression application, in order to obtain a higher compression rate, the required compression time is longer

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  • Method and device for compressing three-phase voltage and current signal waveform sample data
  • Method and device for compressing three-phase voltage and current signal waveform sample data
  • Method and device for compressing three-phase voltage and current signal waveform sample data

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Embodiment Construction

[0058] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0059] figure 1 As shown, it is a flow chart of an embodiment of a method for compressing sampled data of three-phase voltage and current signal waveforms. The method may specifically include the following steps:

[0060] Step 1: Sampling the three-phase voltage and current signal waveforms;

[0061] In an optional example of the present application, the analog-to-digital converter (ADC) used by the monitoring equipment of the monitoring system is 16 bits, the sampling frequency is 10kHz, and the time length of the data is 0.2s (10 power frequency cycles), so that The compression algorithm is described as an example.

[0062] For example, the compression of three-phase voltage signals is taken as an ex...

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Abstract

The application relates to the data processing field of a power system and specifically relates to a method for compressing three-phase voltage and current signal waveform sample data and a compressing device suitable for the method. The method comprises the following steps of: firstly normalizing a sampled three-phase voltage and current signal waveform phase; secondly, taking a cycle as an unit, distinguishing the selected basic cycle from the rest cycles and adjacent data in the basic cycle to allow the primary data into one group of data with steady high order characters and smaller value change; thirdly, respectively capturing the high order part of each data to form one group of subdata and the low order part thereof to form the other group of subdata, and finally compressing two groups of subdata by Huffman algorithm. Through the method, the data compression ratio is greatly improved without any damage, so that the accuracy of the sample data is also ensured. In the device, the method is specifically implemented, thus the device can be accessed into the existing power grid measuring equipment and the communication network to improve the existing power grid measuring equipment.

Description

technical field [0001] The present application relates to the field of power system data processing, in particular to a method for compressing sampling data of three-phase voltage and current signal waveforms, and a compression device suitable for the method. Background technique [0002] The massive process data of the power system contains a wealth of information, which plays an important role in analyzing the operating state of the power grid, providing control and optimization strategies, fault diagnosis, knowledge discovery and data mining. It is of great significance to study data compression methods suitable for engineering practice to reduce the storage and transmission costs of massive data. [0003] At present, data compression methods used in power systems can be divided into two categories: lossy compression and lossless compression. [0004] The commonly used lossy compression methods mainly include pulse code modulation, wavelet transform, interpolation algori...

Claims

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Application Information

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IPC IPC(8): H03M7/30
Inventor 牛胜锁梁志瑞王慧娟苏海锋赵飞
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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