﻿ 电动汽车充电站监控系统录波数据压缩方法

# 电动汽车充电站监控系统录波数据压缩方法Method for Compressing Recorded Data in Electric Vehicle Charge-Station Monitoring System

Abstract: For solving the problem of recording waves difficulty and low transmission efficiency in monitoring system of electric vehicles charging station, a new method for data compression, which integrates two-dimension discrete wavelet transform (DWT) in lifting format and set partitioning in hierarchical tree (SPIHT) coding with drithmetic cod-ing, is introduced. The proposed method compressed monitoring data by means of two-dimension DWT in lifting for-mat, then the SPIHT coding is applied to wavelet coefficients, in the end, the drithmetic coding is used to control the compression performance and increase the compression ratio. The compression experiments of frequent power quality harmonic signals are performed, the results show that the proposed method has better compression performance, which verifies the effectiveness of the algorithm. This scheme has greater application value in monitoring system of electric vehicles charging station.

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