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¬CuΧ«ζ₯πp’½]υ½θ
Residual Lifetime Estimation by the Mixture
Weibull-Power-Law Model
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L£pY, ΛJΦ, μMκ, ΰcΘ
H. Hirose, A. Toya, S. Nakagawa, K. Uchida
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dCwο_ΆB, Vol.116-B, No.12, pp.1587-1594
(½¬8.12)
Trans. IEE of Japan, Vol.116-B, No.12,
pp.1587-1594 (1996.12)
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A new statistical estimation method of the lifetime
of the insulation which had been used for a long period by using
the probabilistic mixture model of the Weibull-power law is shown
in this paper. The cross-linked polyethylene insulated cables which
are used under the ground are
considered to be deteriorate at various rates in accordance with
their stress circumstances. Such a phenomenon leads us to the proposed
mixture model. This method can be applied to the residual lifetime
estimation of the removed cables which had been used under the specified
service voltage stress for a long period. For example, the parameters
and the residual lifetime
estimates are obtained for 22 and 33 kV cables which had been used
for decades by classifying the whole samples into four groups. The
estimated deterioration rates totally differ from those obtained
by the conventional accelerated life tests.
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]υ½, Cuͺz, ¬ͺz, Χ«ζ₯, buP[u
Controlled Indexing: electric breakdown; power cable insulation;
statistical analysis; underground cables; Weibull distribution;
XLPE insulation
Uncontrolled Indexing: XLPE underground power cable insulation;
residual lifetime estimation; probabilistic mixture model;
Weibull-power-law; service voltage stress; deterioration
rates; insulation breakdown; 22 kV; 33 kV
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@
Times Cited in Web of Science:
Cited in Books:
Inspec: 1
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