A method for determining the preventive maintenance interval and frequency of traction power supply and transformation equipment based on the remaining life reliability
A maintenance frequency and preventive technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as the probability of equipment failure, insufficient maintenance, and equipment overhaul
Active Publication Date: 2020-08-28
NANJING ZHONGCHE PUZHEN URBAN RAIL VEHICLE CO LTD
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Problems solved by technology
Regular maintenance mode The maintenance period is fixed, which may cause over-repair or under-repair of the equipment. Insufficient maintenance will increase the probability of equipment failure. When the equipment is healthy, over-maintenance may also induce failure and over-repair may also cause certain economic waste; However, the condition-based maintenance method faces the dilemma of insufficient monitoring of the current state of the equipment and difficult operation; the existing technology has not yet solved such problems
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[0069] The present invention will be specifically introduced below in conjunction with specific embodiments.
[0070] A method for determining the preventive maintenance interval and frequency of traction power supply and transformation equipment based on the remaining life reliability, comprising the following steps:
[0071] Step 1: Determine the reliability function of the equipment; calculate the historical failure information of the equipment, obtain the non-parametric estimated value of the failure probability distribution function through the Bernard median rank estimation method, and obtain the shape parameter β and the scale parameter η by the least square method The equipment reliability function is obtained; it should be noted that: the historical fault information includes: the initial time T of the traction power supply and transformation equipment put into operation 0 ;Device failure time T i , the subscript i indicates the number of failures of the equipment; t...
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The present invention discloses a method for determining the preventive maintenance interval and the number of times of the maintenance for the traction power supply and transformation equipment based on the remaining life reliability. The method comprises: according to the costs of related maintenance activities of the equipment in the historical data, by combining the obtained equipment service time and the remaining life of the last preventive maintenance, calculating the whole life of the equipment, calculating the maintenance cost including the purchase cost of the equipment within the unit time in the number of times of different maintenance, and selecting the number of times of the maintenance with the lowest maintenance cost within the unit time. By using the method disclosed by the present invention, the maintenance interval and the number of times of the maintenance can be accurately obtained, so that the blindness in the maintenance activities can be reduced, the reliability of the equipment can be ensured, the failure rate of the traction power supply and transformation equipment can be reduced, and extension of the service life of the equipment under the condition of the lowest maintenance costs within the unit time is realized, and the availability of the equipment is improved; and optimization and adjustment of the regular maintenance for the traction power supply and transformation equipment can be finally realized.
Description
technical field [0001] The invention relates to the field of maintenance of traction power supply and transformation equipment, in particular to a method for determining preventive maintenance intervals and times of equipment in traction substations. Background technique [0002] With the development of social economy, people's requirements for travel are gradually increasing. Fast, safe and reliable railway travel, especially long-distance travel in the domestic range, has become one of the main choices of people. The country will also vigorously develop railway construction, especially high-speed rail. Establish a major policy that serves the country's economic development and people's livelihood. With the gradual improvement of the nationwide railway network, my country's railways will gradually shift from the construction period to the operation and maintenance period. Therefore, the maintenance of railway traction power supply and transformation equipment has become one...
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IPC IPC(8): G06Q10/00G06Q50/06
CPCG06Q10/20G06Q50/06Y04S10/50
Inventor 郭振通朱新荣李进宁李春广尹洪权周鲁宁王顺鹏陈建海向银强
Owner NANJING ZHONGCHE PUZHEN URBAN RAIL VEHICLE CO LTD