基于偏度和峰度指标的GIS压力异常改进判据研究

Improved Criterion for Abnormal Pressure in Gas Insulated Switchgear Based on Skewness and Kurtosis Index

针对GIS设备传统年泄漏率计算判据的缺陷,提出了一种采用偏度和峰度计算判据的改进计算方法。该方法通过分析气室压力曲线趋势,以正态分布曲线为标准,判断气室压力曲线分布类型,确定气室压力是否异常;若出现气室压力异常,则再通过计算曲线的增量指标,判断其异常类型,最终给出综合判断,对GIS设备运行情况中气室压力状况进行评估。

Aiming at the shortcomings of traditional calculation criterion of annual leakage rate in gas insulated switchgear (GIS) equipment, this paper put forward an improved calculation method of skewness and kurtosis calculation criterion. This method analyzed the curve tendency of air chamber pressure and took the normal distribution curve as a standard, judging the curve distribution pattern of air chamber pressure to determine whether the air chamber pressure was normal. If the air chamber pressure was abnormal, the increment index needed calculating again to judge its abnormal types and gave the synthetic judgment ultimately to carry out evaluation for air chamber pressure status in GIS equipment.