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Method for calculating repair cycle of power transformer in operation

A power transformer and maintenance cycle technology, which is applied in the field of calculation of the maintenance cycle of power transformers in operation, can solve the problems of little involvement in the determination of the maintenance cycle and lack of operability, so as to improve asset management level, improve availability, and reduce management costs Effect

Active Publication Date: 2014-07-02
JINING POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
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AI Technical Summary

Problems solved by technology

[0004] In addition, regarding the application of life cycle cost in the management of power transmission and transformation equipment, the existing research results often focus on cost calculation and model establishment, relatively lack of operability, and rarely involve in the determination of maintenance cycle

Method used

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  • Method for calculating repair cycle of power transformer in operation
  • Method for calculating repair cycle of power transformer in operation
  • Method for calculating repair cycle of power transformer in operation

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Embodiment Construction

[0100] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0101] 1 Estimation model of failure rate and mean working time between failures

[0102] (1) The representation of the relevant state is as follows figure 1 , figure 2 shown.

[0103] (2) Calculation of failure rate and average failure repair time

[0104] According to the reliability statistical data of the same type of transformer in the similar area in the past five years, the fault status of the transformer is analyzed. The statistical data includes: the number of transformers in operation in each year, the number of faults, fault types and fault repair time. Calculated as follows:

[0105] Failure rate λ 1:

[0106]

[0107] Mean time to repair failure MTTR:

[0108]

[0109] Fault repair rate μ 1 :

[0110]

[0111] (3) Calculation of maintenance occurrence rate and average maintenance time

[0112] According to the statistica...

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Abstract

The invention discloses a method for calculating a repair cycle of a power transformer in operation. The method has the advantages that: influence of failure-rate level and a repair time interval on the residual life cost of the power transformer is fully considered, a reasonable repair cycle is determined, and equipment management cost is reduced. The method comprises the following steps of: firstly, establishing a power transformer failure rate and average no-failure operation time estimation model on the basis of operating reliability data of equipment; secondly, according to a calculation result of the estimation model, establishing an in-operation power transformer residual life cost model for comprehensively considering the failure-rate level of the equipment and the repair time interval, and classifying the residual life cost into operating cost, repair cost, failure cost, failure loss, operating period indirect cost and disposal cost according to operation type; and finally, with the aim of optimizing the residual life cost, calculating a suggested time interval of the repair cycle of the power transformer.

Description

technical field [0001] The invention relates to a method for calculating the maintenance cycle of an in-service power transformer based on the optimization of remaining life cost. Background technique [0002] Maintenance is produced along with the use of equipment. With the development of science and technology, the level of industrial technology and the degree of production automation continue to increase, the importance of equipment maintenance has gradually been recognized. It is one of the basic tasks of power grid enterprises to maintain power equipment and ensure safe, reliable and economical operation of the power grid. At the same time, due to the sharp increase of grid equipment, maintenance costs have become an important cost for power companies. Appropriate maintenance strategies can effectively improve the efficiency of equipment operation, bring great economic and social benefits to the power grid, and effectively promote the development of energy conservatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00H02B3/00
Inventor 王彦良王继文陈晓红肖云东张建峰孔平李先升白茂波靳昕春
Owner JINING POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
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