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Distribution system reliability evaluation method based on equipment life cycle

A technology for a full life cycle, power distribution system, applied in information technology support systems, instruments, data processing applications, etc., can solve problems that affect the final planning decision of the system, system reliability impact, etc.

Inactive Publication Date: 2017-05-31
国网江西省电力有限公司经济技术研究院 +1
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Problems solved by technology

[0005] It can be seen that the failure rate of components in different operating periods will have varying degrees of impact on system reliability, which in turn will affect the final planning decision of the system

Method used

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  • Distribution system reliability evaluation method based on equipment life cycle
  • Distribution system reliability evaluation method based on equipment life cycle
  • Distribution system reliability evaluation method based on equipment life cycle

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Embodiment Construction

[0051] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0052] A reliability assessment method for power distribution system based on the whole life cycle of equipment,

[0053] First, divide the failure mode and equipment life cycle stages: before establishing the failure rate model of the equipment life cycle, integrate three failure modes (early run-in failure, occasional failure failure and aging fatigue failure), and divide the equipment life cycle It is divided into four stages: early stage of operation, normal operation period, aging maintenance period, and accelerated aging period. Such as Figure 5 shown.

[0054] Secondly, based on the whole life cycle theory and period division of equipment, a mathematical model of the failure rate of power distribution equipment is established; and considering the characteristics of failure modes and repairs experienced by equipment in different ...

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Abstract

The invention discloses a distribution system reliability evaluation method based on an equipment life cycle. the method comprises steps: a fault rate model for each operation period in the equipment life cycle is built; influences of a time-varying fault rate of the equipment on system reliability analysis are considered, a sequential simulation method is adopted to generate aging failure time, and the aging unavailability of the equipment under the same aging time distribution is determined; and in a sequential Monte-Carlo simulation method for system reliability, a simulation model for the equipment life cycle fault rate is built, and the distribution system reliability calculation based on the equipment life cycle fault rate is realized. in order to facilitate analysis and comparison on the equipment reliability cost, a reliability investment / reward analysis model is built on the basis of a present value method, the necessity of the equipment life cycle fault rate towards the distribution system reliability planning is expressed through an example, and an important role is played in improving the rationality and the economy of planning of the power system.

Description

technical field [0001] The invention relates to a distribution system reliability evaluation method based on the whole life cycle of equipment, belonging to the technical field of distribution system reliability. Background technique [0002] With the continuous advancement of power system reform, the power grid has paid more and more attention to the economic analysis of power grid operation, among which power grid planning is an important means to improve the medium and long-term economic operation of the power grid. In the reliability planning and design stage of power distribution system, the failure rate of electrical equipment such as main transformers, switches and lines within the service life has an important impact on the economic operation of power distribution system. [0003] Commonly used reliability assessment methods for power distribution systems are divided into analytical methods and simulation methods. Although the analytical evaluation method has the ad...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06Y04S10/50
Inventor 程虹陈会员熊宁朱文广肖园钟士元李海坤
Owner 国网江西省电力有限公司经济技术研究院
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