Statistical Treatment of Insulation Failure Data With The Application of Simplified Regression Method in The High-Voltage Laboratory

Abstract

In this article, we propose a new and simplified regression method for estimating the parameters of the Weibull distribution for high-voltage insulation failure data. This method is simpler to apply than the widely used maximum likelihood method and has some interesting properties suitable for small sample size data and short lifetime test data. This fact makes the method appealing for practical purposes. A simulation is applied for comparison of the introduced simplified regression method with the maximum likelihood method. Comparison is also realized by using experimental data obtained from lifetime recordings during stressing of pressboard and XLPE specimens with 50Hz a.c. voltages of constant value in the high-voltage laboratory.