瞬时无功功率与小波变换谐波检测的对比研究  

Comparison of the Instantaneous Reactive Power Theory With the Wavelet Transformation Method for Harmonic Current Detection

作　　者：刘洪春[1] 孙曙光[1] 王景芹[1] 侯世昌[1] 

机构地区：[1]河北工业大学,电气与自动化学院,天津300130

出　　处：《电力电子技术》2012年第9期46-48,96,共4页Power Electronics

摘　　要：为更好地分析谐波,提出了一种新型基于小波变换谐波电流检测方法,并对基于瞬时无功功率理论的检测方法与基于小波变换的谐波电流检测方法进行了仿真和实验对比。验证了小波分析具有时域和频域的双重分辨率,具有很快的动态响应速度和很好的精度,能较好地解决谐波分析问题。以PCI-1712L高速数据采集卡为硬件基础,设计了一种基于VB与Excel或基于LabVIEW的谐波电流检验装置。样机结果表明,基于小波变换谐波电流检测方法效果最佳。A new harmonic current detection method based on the wavelet transformation is proposed which in order to analyze the harmonic well.The harmonic current detection methods which based on the instantaneous reactive power theory and based on the wavelet transform are compared in the simulation and experiment.The test results show that the wavelet transformation has double resolutions in both time and frequency domains.h has fast dynamic response speed and good accuracy which can solve the harmonic problem analysis well.It takes PCI-1712L high speed data acquisition card and designs a set of harmonic current detection device based on VB and Excel or based on LabVIEW. The result shows that the harmonic current detection method based on the wavelet transformation has the best effect.

关 键 词：谐波电流检测 瞬时无功功率 小波变换 

分 类 号：TM911[电气工程—电力电子与电力传动]