基于小波分析的电能质量谐波检测虚拟仪  

Power quality harmonic detection virtual instrument based on wavelet analysis

作　　者：王吉元[1] 

机构地区：[1]黑龙江科技学院电气与信息工程学院,哈尔滨150027

出　　处：《工业仪表与自动化装置》2010年第5期77-79,共3页Industrial Instrumentation & Automation

摘　　要：介绍了一种基于小波分析的电能质量谐波检测技术,在LabVIEW虚拟仪器设计平台上采用小波分析技术检测电能突变点,并采用快速傅立叶变换对稳态信号进行谐波失真分析,获得基波频率、各次谐波含有率及总谐波畸变率THD等,实现电能质量谐波检测。实验结果表明,利用该方法可以很好地去除信号突变,精确地提取出稳态信号。This paper introduces the technology of power quality harmonic detection based on wavelet analysis.The disturbed points of power signal are detected by using wavelet analysis on the virtual instrument design platform of LabVIEW,and the harmonic distortion of the stable signal is analyzed by use of FFT,which can measure the base frequency,the harmonic ratio and the total harmonic distortion（THD）.The experimental results indicate that the method using wavelet can eliminate the disturbance of signal efficiently and extract the stable signal precisely.

关 键 词：电能质量 谐波检测 小波分析 虚拟仪器 LABVIEW 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]