High Speed Data Compression Method of Merge Unit Based on SCD File

In modern smart grid, many merging units are installed in smart substation to release transient data of current transformer and voltage transformer synchronously, these transient data need to be saved for several years, so as to cover the life cycle of equipment and provide original information supp...

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Bibliographic Details
Published in:Ji suan ji ke xue Vol. 50; no. 12; pp. 123 - 129
Main Authors: Chen, Xingtian, Xiong, Xiaofu, Bai, Yong, Hu, Haiyang
Format: Journal Article
Language:Chinese
Published: Chongqing Guojia Kexue Jishu Bu 01.12.2023
Editorial office of Computer Science
Subjects:
Compression ratio
Data compression
merge unit sampling data|lossless data compression|huffman coding|lzma compression algorithm|wavelet transform
Smart grid
Storage equipment
Substations
Voltage transformers
ISSN:1002-137X
Online Access:Get full text
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Summary:In modern smart grid, many merging units are installed in smart substation to release transient data of current transformer and voltage transformer synchronously, these transient data need to be saved for several years, so as to cover the life cycle of equipment and provide original information support for condition maintenance and reliability of equipment, but such long-time and high-frequency massive data is a difficult problem for storage equipment.In this paper, the high-frequency transient data are preprocessed in three forms: fixed, state-changing and periodic-changing.Tthe fixed part is replaced by merge's APPID in SCD file, the state-changing part is replaced by event record file, and the periodic-changing part is represented by two-channel diffe-rence and periodic difference in SCD file, and the final compression coding is completed with 16-bit Huffman.The final test shows that the compression ratio of this compression method is larger than that of common hardware compression card, and the compressio
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ISSN:1002-137X
DOI:10.11896/jsjkx.230700230