A set of 15 statistical operators such as skewness, kurtosis, the number of peaks have been introduced for representing the characteristics of statistical distributions.

• 本文采用偏斜度 、峭度 、峰值数 等15个统计算子来表征局放信号统计谱图的特征，并建立了四种典型局部放电类型的特征指纹库。