基于变尺度标杆的短时电能质量分类法

短时电能质量扰动特征取决于其频率特征和持续时间，S变换被认为是最适合于分析短时扰动的方法之一。提出了基于S变换的不同类型扰动标杆相似度识别不同持续时间扰动的方法。基于双线性插值的尺度变换建立同类扰动不同持续时间的标杆，该扰动标杆涵盖了同类扰动的不同特征；对被测扰动信号进行S变换，经过尺度变换后统一为与标杆维数相同的矩阵，依据相似度最大原则对扰动类型进行识别。该方法无需额外的分类器，过程简单有效。仿真证明，该方法对噪声不敏感，能较好地解决不同持续时间的电能质量扰动信号的识别问题。

Classification Method of Short Duration Disturbances based on Similarity of Benchmark

The features of short duration power quality disturbance depend on its frequency character and duration,so S-transform is regarded as one of the most suitable methods to analyze short duration disturbance.A classification method for different duration power quality disturbance based on similarity of scale-transform module time-frequency matrixes by S-transform is proposed.At first,the benchmark module time-frequency matrixes of different duration disturbance based on bilinear-interplot scale-transform are c...