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《Automation of Electric Power Systems》 2002-19
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DWT APPLICATION TO REAL-TIME COMPRESSION OF POWER QUALITY DISTURBANCE DATA

Ju Gaofeng, Luo An (Central South University, Changsha 410083, China)  
In power system, rapid volume increasing of the monitoring data, concerned with certain power quality disturbance in a short time, causes much trouble when saving. Thus a compression algorithm needs to be carried on the data before being saved. A real time method so called discrete wavelet transform (DWT) method is proposed. Through applying real time multi resolution analysis (MRA) to the data, selecting and saving wavelet transform coefficients of each scale related to certain disturbance, real time data compression can be reached. These coefficients can be used to reconstruct the original data with little information lost. Feasibility of this real time method has been verified in a practical project.
【CateGory Index】: TM933.4
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