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A method of analyzing insulating material performance by using three-parameter Weibull distribution to process flashover voltages

A technology of flashover voltage and insulating materials, which is applied in the field of Weber distribution processing flashover voltage analysis of insulating material properties, and three-parameter Weber distribution processing flashover voltage analysis of insulating material performance fields, which can solve the problems of insufficient fit, errors, and defined formulas. Large and other problems, to achieve the effect of good fitting effect, high accuracy, and simple calculation

Active Publication Date: 2016-08-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Therefore, the results obtained in the two-parameter form are slightly deviated from the reality, and the fitting degree is not high enough
And when the sample size is small, the definition will produce a large error

Method used

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  • A method of analyzing insulating material performance by using three-parameter Weibull distribution to process flashover voltages
  • A method of analyzing insulating material performance by using three-parameter Weibull distribution to process flashover voltages
  • A method of analyzing insulating material performance by using three-parameter Weibull distribution to process flashover voltages

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Embodiment 1

[0035] Three-parameter Weibull distribution processing flashover voltage analysis method for the performance of insulating materials, including the following steps:

[0036] Step 1: Collect n flashover voltages and arrange them in ascending order to form a voltage vector U={u i}, n≥i≥1, i is the failure ordinal number, which means u i Sorting in the flashover voltage sample data; if more than two flashover voltage sample data are equal, give them the same failure sequence number;

[0037] Step 2: Establish a three-parameter Weibull distribution flashover voltage probability model:

[0038] F ( x ) = 1 - exp [ - ( x - γ α ) β ] - - - ...

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Abstract

The invention provides a method of analyzing insulating material performance by using three-parameter Weibull distribution to process flashover voltages. The method comprises the steps of collecting n flashover voltages, arranging the voltages in an ascending order, building a voltage vector U and assigning failure ordinals; establishing a three-parameter Weibull distribution flashover voltage probability model; calculating the corresponding accumulated flashover probabilities of the flashover voltages under the failure ordinals; fitting the scale parameter, the shape parameter and the position parameter in the three-parameter Weibull distribution flashover voltage probability model; analyzing insulating material performance by using the three-parameter Weibull distribution flashover voltage probability model. The three-diameter Weibull distribution is employed to process flashover voltage data and calculate the flashover probabilities and thus is closer to the actual condition compared with that based on two parameters, is better in fitting effect and higher in accuracy; the failure level concept is employed for calculating the accumulated flashover probabilities and a medium rank formula is used for correcting the failure level, so that the problem of result deviation caused by insufficient samples is solved; the calculation is simple and the operating speed is high; the method can be used for flashover voltage prediction and the insulating design standard is determined according to the flashover probability requirement.

Description

technical field [0001] The invention relates to a method for analyzing the performance of insulating materials by processing flashover voltage with Weber distribution, in particular a method for analyzing the performance of insulating materials for processing flashover voltage by three-parameter Weber distribution, which belongs to the technical field of electric power protection. Background technique [0002] The Weibull distribution is obtained based on the weakest link model or the series model, which can fully reflect the influence of insulation material defects and stress concentration sources on the fatigue life of materials, and has an increasing failure rate, which is in good agreement with the actual situation in terms of dispersion statistics. Applied to reliability analysis and life test. In the research of high-voltage insulation, it is mainly used for data processing such as breakdown voltage and flashover voltage. [0003] The existing methods for processing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 谢庆黄河王幼男王涛胡志亮任洁付可欣徐玉琴
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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