Method of selecting step stress test parameters for XLPE insulation DC voltage endurance coefficient

Bian, Haoran; Yang, Lijun; Yao, Ren-yun; Ma, Zuwei; Li, Zhong-xuan; Wang, Xue-er; Yuan, Yuan

doi:10.1109/tdei.2019.007649

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…The sample parameters can be obtained from the fitting result of the life curve as: n constant = 12.83, D constant = 3.42×10 21 . This is consistent with the n = 12.2 obtained in previous studies [6]. Therefore, this result can be used to verify the results of the step stress test.…”

Section: Obtaining N Values By Constant Stress Testsupporting

confidence: 92%

“…where Dc value can be obtained by short-time breakdown test, which is calculated as in Equation (6). The value of k can be predicted based on Equation (5), and the detail of the prediction method is given in Section 4.2.…”

Section: Methods For Selecting Step Stress Parameters That Meet the E...mentioning

confidence: 99%

“…From the fitted curve equation, the short-time breakdown electric field strength E b corresponding to the failure rate of 63.2% is 354 kV/mm. Substituting {E b ; v; n 1 = 10} into Equation (6), D c1 = 9.95×10 15 . E a = 30.73 kV/mm is chosen (Data from Li Lan 2014 [20] which also test the XLPE manufactured by the BOREALIS) since the tests are conducted at room temperature.…”

Section: Obtaining N Values By Constant Stress Testmentioning

confidence: 99%

“…Currently, few studies have been done on the accuracy problem. Bian et al [6] used the exact aging mechanism as the accuracy condition and the test duration as the basis for classifying the aging mechanism. However, the step test duration was influenced by various factors.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact of step voltage parameters on accuracy of evaluating XLPE insulation DC voltage endurance coefficient

Ma,

Li,

Chen

et al. 2023

IET Generation Trans & Dist

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The voltage endurance coefficient n of cross‐linked polyethylene (XLPE) insulation is an important indicator for the analysis of insulation failure mechanism. Accurately obtaining the value of n can provide technical support for the reliability evaluation of cable operation. The constant stress method and the step stress method are used to obtain the values of n, but the test parameters can influence the accuracy of the obtained n values. Two methods for selecting test parameters are proposed. The equivalence between the two methods is established, providing theoretical support for the accurate evaluation of the n value of solid insulation materials by using the step stress method. The accuracy of the evaluation results is verified by analyzing the test data. The test results show that the nstep = 13.04 evaluated by the step stress test with the proposed parameter selection method is consistent with the test result of constant stress nconstant = 12.83.

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Section: Obtaining N Values By Constant Stress Testsupporting

confidence: 92%

Section: Methods For Selecting Step Stress Parameters That Meet the E...mentioning

confidence: 99%