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基于小波包分解与重构算法的谐波电能计量

, PP. 200-206

Keywords: 谐波电能,小波包,分解与重构,非稳态,虚拟仪器

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Abstract:

为实现复杂工业现场的电能准确计量,提出了基于小波包分解与重构算法的谐波电能计量方法,介绍了小波包的分解与重构算法和基于该算法的谐波信号提取方法,给出了谐波功率计算式与谐波电能计量原理;利用db42小波函数进行谐波电能计量仿真分析,仿真信号的基波频率为50Hz,采用2层小波包变换,取40个基波周期内的仿真输入信号,采样频率fs为800Hz,稳态、非稳态谐波有功电能与谐波无功电能计量仿真实验结果证明了算法的可行性与准确性;在此基础上研制的基于虚拟仪器技术的三相谐波电能计量装置实现了各次谐波有功电能、无功电能计量,准确度达0.2S级,符合GB/T14549—1993的A类标准要求。

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