基于DSP和小波变换电能质量检测的研究

本文简要介绍了小波变换和多分辨率分析及其非线性信号消噪原理,并将该项技术应用于交交变频调速系统电能质量信号的消噪处理中,本文采用了一种在以数字信号处理器(DSP)为核心所构成的交交变频调速电能质量检测系统中对信号进行消噪的新设计方案.采用这种消噪方法,不但可以保留信号的突变特性,还可以大大降低对信号调理电路的设计要求,简化电路结构,严格保证原始信号之间的相位关系,适用于对实时性要求不高的信号检测系统.

Research of DSP and Wavelet Transform for Power Quality Monitoring System

The wavelet transform and its multi-resolution analysis and the principle of nonlinear signal de-noising are briefly introduced. By applying this technique to the de-noising of power quality of AC-AC variable frequency speed regulation system, a new design of power quality of AC-AC variable frequency speed regulation system is presented,which uses Digital Signal Processor(DSP)as its core. The de- noising technique can not only preserve the signal character of sudden change,but also greatly loose the design requirement of signal processing circuit and simplify the circuit structure. The phase relation between original signals is strictly ensured. This design is particularly applicable to signal detecting system with lower real time performance.