Data compression and decompression methods for intelligent power grid communication and intelligent power grid communication system

A smart grid communication and data compression technology, applied in the direction of digital transmission system, transmission system, electrical components, etc., can solve the problem of low intelligent communication rate

Active Publication Date: 2015-09-23
SHENZHEN CLOU ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The basis of smart grid is communication. Due to the uncertainty of the environment and the limitation of technology, the current intelligent communication rate is generally relatively low. For example, the general rate of narrowband power line carrier communication is only a few hundred BPS, and the RS485 communication interface rate of the energy meter is only 1200 / 2400BPS.

Method used

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  • Data compression and decompression methods for intelligent power grid communication and intelligent power grid communication system

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Embodiment 1

[0018] Embodiment 1. This embodiment is a smart grid communication system, which is mainly used for electronic meter reading. The communication system uses power line carrier to send the data of the meter to the billing center. When using power line carrier communication, the power line zero-crossing point is generally used A frame of data is transmitted at any time. At present, the bandwidth is relatively narrow, and generally each frame of data is about ten bytes. The system includes a sending end and a receiving end, the sending end communicates with the receiving end through a power line carrier, the sending end includes a source coding module, and the receiving end includes a sink decoding module.

[0019] The sender needs to send communications about the three rate periods 00:00-08:00, 08:00-14:00, and 14:00-00:00. Currently, when communicating with these three rate periods, the transmitted It is BCD code, BCD code data is 00 00 08 00 08 00 14 00 14 00 00 00, the sending...

Embodiment 2

[0030] Embodiment 2 transmits the three-phase real-time voltage 230V 228V 229V, and the source encoding module and the sink decoding module perform the following compression and decompression processes respectively:

[0031] Three-phase real-time voltage, 230V 228V 229V, BCD data frame 02 30 02 28 02 29, compressed data 02 A8 30 28 29, compression rate 16.7%.

[0032] Embodiment 2 transmits the real-time power total / peak / peak / flat / valley of four rates, 8758.65 / 0.00 / 7235.32 / 1523.33 / 0.00, and the source encoding module and the sink decoding module perform the following compression and decompression processes respectively:

[0033] Four-rate real-time power total / peak / peak / flat / valley, 8758.65 / 0.00 / 7235.32 / 1523.33 / 0.00, BCD code data frame 00 87 58 65 00 00 00 00 00 72 35 32 00 15 23 33 00 00 00 00, The compressed data 00 E0 77 00 87 58 65 72 35 32 15 23 33, the compression ratio is 35%.

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Abstract

The invention discloses data compression and decompression methods and an intelligent power grid communication system. The data compression method includes steps: performing statistics of a character c which appears with the highest frequency in a frame of data and calculating the frequency m of the character c; and generating a bit field Bn of n bits and regenerating a compressed frame. The decompression method comprises traversing the effective bit of the Bn field; if the bit is 1, the corresponding character is c; and if the bit is 0, one character is taken from the remaining byte array. A source coding module of the intelligent power grid communication system realizes the data compression method, and a sink decoding module realizes the decompression method.

Description

technical field [0001] The invention relates to a data compression method, in particular to a method for compressing communication data during source coding during power line carrier communication and a smart grid communication system. Background technique [0002] Data compression refers to a technical method to reduce the amount of data to reduce storage space and improve its transmission, storage and processing efficiency without losing information. Or reorganize the data according to a certain algorithm to reduce data redundancy and storage space. [0003] Source coding is a transformation performed on the symbol sequence output by the source in order to reduce the residual degree in the symbol sequence output by the source and increase the average information content of the symbol. Specifically, it is to find a method according to the statistical characteristics of the source output symbol sequence, and transform the source output symbol sequence into the shortest code...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M7/30
CPCH03M7/30H04L1/0014
Inventor 祝文闻潘志强
Owner SHENZHEN CLOU ELECTRONICS
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