短时电能质量扰动变尺度标杆相似度识别

Classification of Short Duration Disturbances Based on Similarity of Varying Scale Benchmark

利用S变换模矩阵相似度识别持续时间不同的电能质量扰动信号,需要建立维数不同的标准模板。应用双线性插值法对S变换模时频矩阵进行尺度变换,对不同持续时间的同类扰动可建立统一的标杆模板,减少了标准模板数。根据最大相似度原理,通过简单的四则运算对扰动进行分类,无需添加任何分类器,分类过程简洁有效。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分类问题。

Since the application of the similarity of module time-frequency matrixes by S-Transform to identify different duration power quality disturbance needs different dimensions of the standard templates,module time-frequency matrix scale-transformation based on bilinear interpolation is used to construct standard templates for different duration disturbances,which reduces the template number.Based on maximum similarity principle,the identification system only needs simple arithmetic operations to classify distu...