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Dynamic data compression storage method in electric network wide-area measuring systems (WAMS)

A wide-area measurement system and dynamic data technology, applied in the field of power system dispatch automation, can solve problems such as difficult to achieve WAMS requirements, and achieve the effect of efficient storage management

Active Publication Date: 2008-05-14
BEIJING SIFANG JIBAO AUTOMATION +1
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Problems solved by technology

[0007] The data compression algorithm is the core content of the present invention, and other compression algorithms are difficult to meet the requirements of WAMS

Method used

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  • Dynamic data compression storage method in electric network wide-area measuring systems (WAMS)
  • Dynamic data compression storage method in electric network wide-area measuring systems (WAMS)

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Experimental program
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Embodiment Construction

[0029] Figure 1 Schematic diagram of dynamic data access process. As shown in Figure 1, the process of data compression is as follows:

[0030] (1) organize the raw data;

[0031] (2) Carry out appropriate power system numerical transformation on the original data;

[0032] (3) Using lossless compression algorithm and elementary transformation to compress data;

[0033] (4) Framing the data type TYPE, reference information REF, index KEY and compressed data DATA;

[0034] (5) Write the data into the data file;

[0035] The dynamic data storage process adopts a single-flow processing method to complete numerical transformation, data compression, data organization, and data storage in sequence. Simple and efficient processing ensures high-speed, high-precision, and high-density dynamic data storage efficiency. In data application, it is processed serially according to the process of data query, data analysis, data decompression, numerical transformation, and data application...

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Abstract

The invention relates to a method of compressing and storing a dynamic data in a wire area measuring system (WAMS), which comprises the steps of numerical inversion treatment, lossless compression, data organization and storage. The numerical inversion treatment comprises the following steps: in the same station, a phase angle of effective phasor is as the reference phase angle. Except the reference phase angle, the phase angles of the voltage and the current phasor of the other components transform into the relative phase angle corresponding to the reference phase angle. When in storage, thereference phase angle is stored directly and the other phase angles store relative phase angles. When calling the phase angle data, the reference phase angle and the relative phase angles are used fordeoxidizing.

Description

technical field [0001] The invention relates to the field of power system scheduling automation, in particular to a method for compressing and storing dynamic data in the process of dynamic safety monitoring. Background technique [0002] With the interconnection of large power grids and the increasingly prominent contradictions of power transmission from west to east, the power grid is facing more and more new challenges, and the stability analysis and monitoring of operation are becoming more and more important. Synchronized phasor measurement technology and modern high-speed digital communication network provide technical support and guarantee for us to realize online monitoring of power grid dynamic process. The wide-area real-time dynamic monitoring system of the power grid is a technical means to accurately capture the dynamic process of the power grid under the conditions of power system online fault disturbance, low-frequency oscillation and manual test. The synchro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R25/00H03M7/30
Inventor 杨东齐文斌吴京涛
Owner BEIJING SIFANG JIBAO AUTOMATION
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