Method for measuring converter transformer paper oil insulation partial discharge characteristic

The invention relates to a method for measuring a converter transformer paper oil insulation partial discharge characteristic, and belongs to the technical field of insulation detection of high-voltage electrical equipment. The converter transformer paper oil insulation partial discharge phenomenon belongs to a random process, in the method, based on the relation between the discharge capacity and the time interval in the discharge phenomenon, a series of relational graphs are built, and statistic characteristic parameters of partial discharge are extracted from the rational graphs, wherein the parameters include a degree of skewness Sk (representing the deviation degree of a spectrogram distribution curve relative to normal distribution), a kurtosis Ku (representing the sharpness of the spectrogram distribution curve relative to normal distribution), a Weibull distribution parameter scale parameter alpha and a shape parameter beta. Twenty characteristic parameters obtained by the method are used as the criterion for judging the types and order of severity of the converter transformer paper oil insulation partial discharge, according to the criterion, operators make a rational state maintenance strategy for the converter transformer, and a reliable technical support is provided for manufacturing and operating of the converter transformers.