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A Decision-Making Method for Power Equipment Maintenance Using Equal Deterioration Theory and Equipment Risk

A technology of power equipment and decision-making methods, applied in general control systems, instruments, adaptive control, etc., can solve problems such as equipment reliability degradation, ignoring the impact of equipment maintenance and equipment failure rates, etc.

Active Publication Date: 2019-11-26
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is mainly aimed at problems such as neglecting the influence of equipment maintenance on the failure rate of equipment in the current research on equipment maintenance strategies, and the trend that the reliability of equipment is deteriorating continuously in the whole life cycle. The equipment degradation theory is introduced into the operation analysis of power equipment, on this basis, the equipment risk-based maintenance strategy optimization model is established

Method used

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  • A Decision-Making Method for Power Equipment Maintenance Using Equal Deterioration Theory and Equipment Risk
  • A Decision-Making Method for Power Equipment Maintenance Using Equal Deterioration Theory and Equipment Risk
  • A Decision-Making Method for Power Equipment Maintenance Using Equal Deterioration Theory and Equipment Risk

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Embodiment

[0077] Below is the step that adopts the specific embodiment of the present invention, as follows:

[0078] 1. Deduce the relationship between the cumulative failure density of each maintenance cycle and the reliability of the first minor repair cycle (that is, the initial state)

[0079] According to the two-parameter Weibull distribution, the failure rate function and reliability function of the power equipment can be obtained as

[0080]

[0081]

[0082] Then its failure probability density function and cumulative failure probability density function are respectively

[0083]

[0084]

[0085] Then MTBF can be expressed by the mean value of the Weibull distribution, and we get:

[0086]

[0087] According to the equal degradation theory, it can be seen that

[0088] MTBF i,j =MTBF 1,1 ×(1-r 1 ) j-1 ×(1-r 2 ) i-1 (25)

[0089] Then substitute formula (24) into formula (25) to get:

[0090] alpha i,j = α 1,1 ×(1-r 1 ) j-1 ×(1-r 2 ) i-1 (26) ...

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Abstract

The invention relates to a power equipment maintenance decision-making method, and particularly relates to a power equipment maintenance decision-making method utilizing an equal degradation theory and equipment risks. According to the invention, the equal degradation theory is introduced into the power industry, analysis and comparison are performed on changes in equipment risk before and after maintenance by sufficiently considering changes in equipment failure probability before and after maintenance, and the equipment maintenance cost is considered so as to acquire an optimal maintenance scheme. The power equipment maintenance decision-making method starts from the view of asset management, the cost required by equipment in the whole life cycle is enabled to reduce to minimum, and a balance point is found between self values of the equipment and economic benefits brought by the equipment to a system, between LCCM (Life Cycle Costing Management) and equipment maintenance and between technologies and management of the power system.

Description

technical field [0001] The invention relates to a decision-making method for maintenance of electric equipment, in particular to a decision-making method for maintenance of electric equipment using the theory of equal degradation and equipment risk. Background technique [0002] The term "asset management" is now being used to describe one of the most challenging problems in the power industry. Asset management involves the investment, operation, maintenance, replacement and eventual decommissioning of power equipment, including power generation, transmission, and distribution equipment. The reduced reliability of capital investment prevents companies from investing in new equipment and forces companies to overhaul and operate aging equipment. At present, maintenance methods can be basically divided into two categories: after-failure maintenance and preventive maintenance. The preventive maintenance can be further divided into three categories: periodic maintenance, condit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 黄欢赵立进黄良曾华荣毛先胤杜昊龚庆武乔卉刘栋李俊雄
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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