Study on Electrical Aging Lifetime of Power Cable with Extruded Insulation

Wei Guo Li; Gao Sheng Ye; Shi Kun Wang

doi:10.4028/www.scientific.net/AMR.156-157.1041

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Study on Electrical Aging Lifetime of Power Cable with Extruded Insulation

Abstract:

Extruded insulation is a major kind of insulation used in power cable. It is significant to evaluate extruded insulation lifetime suffered from electrical aging, which can improve the reliability of power cable. In this paper, a step-stress test method is used in accelerated life tests and Weibull model is used to statistic analysis for the mean lifetime of several samples under the same voltage value, and then the least square method is used to calculate the parameter of Weibull distribution. This paper uses inverse power function to fit test data and calculate voltage endurance coefficients. Constant-stress test data is also used as the counterpart of that measured by the step-stress test. It is indicated that the test voltages of step-stress test are more easily selected than that of constant tests and the data of the former is less scattered and the result is more reliable.

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Periodical:

Advanced Materials Research (Volumes 156-157)

Pages:

1041-1045

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.156-157.1041

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Online since:

October 2010

Authors:

Wei Guo Li, Gao Sheng Ye, Shi Kun Wang

Keywords:

Accelerated Aging, Extruded Insulation, Lifetime Model, Step-Stress Test, Weibull Distribution

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References

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