Normality test and characteristic statistic analysis of transient electromagnetic disturbance

According to the diversity of transient electromagnetic quantity, typical waveforms and spectrums of switching operation are got in transient disturbance; then, the disturbance characteristic of time and frequency domain are analyzed. Mainly the distribution probability and frequency statistic of characteristic parameter are analyzed. Drawing up probability graph of time-domain and envelope diagram of frequency-domain, continue to analyze. Besides, this paper makes a small sample statistic analysis based on statistic theory, utilizes the methods of normality test, such as normal probability test, W-normality test, D-normality test, kurtosis and skewness test, and compares these test methods to get initial conclusions.