【摘要】 对电能质量问题和基于变换的电能质量分析方法进行了综述。文中给出了各种电能质量扰动现象的分类与特征 ,对傅里叶变换、短时傅里叶变换、小波变换和二次变换这 4种变换分析方法的基本原理及其在电能质量领域的应用作了详细论述 ,阐明了各种方法的特点及其适用条件。最后提出了电能质量研究的方向更多还原

【Abstract】 The power quality problems and their transformation basedanalysismethods aresummarized. The categories and characteristics disturbing the power quality are presented. The basic principle of four transformation based analysis methods, such as Fourier transformation (FT),Short time Fourier transformation (STFT), wavelet transformation (WT) and quadratic transformation (QT) are expounded and their applications in the power quality assessment are described in details. The property and appropriate applying situation of each method are illustrated. Finally, the prospect of power quality study is described.更多还原