基于正态模型的电气试验方法优化及参数估计研究

Research on Optimization and Parameter Estimation of Electrical Test Method Based on Normal Model

以最小二乘参数的估计方法为基础,结合升降法以及多级法来统计分析电气试验数据的标准偏差和中值。通过相关研究可知,升降法和多级法试验数据估计的中值数值50%放电电压U50所具备的一致性较为良好,3.7%是其存在的差值;然而两种试验方法相应标准偏差估计值有较大不同,可高达42.6%。因此,在电气试验中应尽可能选取多级法。

Based on the estimation method of the least square parameters,the standard deviation and median value of the electrical test data are analyzed by using the up and down method and the multi-level method.It can be seen from the relevant research that the median value of 50%discharge voltage U50 estimated by the up and down method and the multi-level method is in good agreement,and 3.7%is the difference between them;however,the corresponding standard deviation estimates of the two test methods are quite different,which can be as high as 42.6%.Therefore,the multi-level method should be selected as much as possible in the electrical test.