三相电能质量数据压缩方法  

A Method to Compress Three-Phase Power Quality Data

作　　者：管春[1] 周雒维[1] 卢伟国[1] 刘奇[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《电网技术》2011年第10期130-134,共5页Power System Technology

基　　金：国家自然科学基金项目(50807058)~~

摘　　要：提出了一种基于图像编码算法的三相电能质量数据压缩新方法。首先采用dq0变换转换三相电能质量数据以消除三相数据之间的冗余;然后按整数倍周期将变换后的一维电能质量数据转换为二维矩阵以消除其循环间冗余。最后结合提升格式的二维离散小波变换、图像多级树集合分裂(setpartitioning in hierarchical tree,SPIHT)编码以及DEFLATE编码算法进行数据压缩。实验结果表明,该方法可以有效压缩三相电能质量数据。A new image coding algorithm-based method to compress three-phase power quality （PQ） data is proposed. Firstly, the three-phase PQ data is transformed by dq0 transformation to eliminate the redundancy among three-phase data; then according to the periods that are the integral multiple of fundamental, the transformed one-dimensional PQ data is changed into two-dimensional matrix to eliminate the redundancy among cyclings; finally, combined with two-dimensional discrete wavelet transform in lifting scheme, image set partitioning in hierarchical tree （SPIHT） coding and DEFLATE coding algorithm the data compression is performed. Experimental results show that the proposed method can effectively compress three-phase PQ data.

关 键 词：电能质量 数据压缩 DQ0变换 小波变换 多级树集合分裂编码 

分 类 号：TM714[电气工程—电力系统及自动化]