Reliability evaluation of the hottest power genera

Reliability evaluation of power generation equipment

according to the different status, functions and functions of power generation equipment in the power generation system, the indicators and methods of reliability evaluation are different. For example, steam turbines, boilers, generators, transformers, etc. pay attention to "trouble free working time", "availability factor", etc., while short circuiting devices pay attention to "trouble free action times". As for automatic relay protection devices, Because it is difficult to determine the "trouble free working time", it is necessary to use "correct action rate" and "false action rate" as its reliability evaluation index. Although the forms of reliability evaluation indicators are different, they are consistent in describing the working life or availability of equipment to maintain the expected function

in order to meet the needs of reliability evaluation in different applications, although the specific indicators are different, they can be summarized into the following categories: ① probability indicators, such as reliability, availability, etc; ② Frequency indicators, such as the average number of unexplained

obstacles, etc; ③ Time indicators, such as average life span, have no average of 7 Cast iron platform: it is used for the operation time of the fire door when it is flat; ④ Expected value, such as the expected value of the number of days of equipment failure in the research cycle

the following work is very important to correctly evaluate the reliability of equipment

(1) clearly define equipment failure

(2) accurately establish the reliability model of the equipment

(3) obtain the complete failure rate data of 378 of the equipment or system components, which increases by 0.27%

from the perspective of implementing condition based maintenance, the purpose of equipment reliability evaluation is:

(1) to understand whether the reliability proposed in the maintenance task provides high-quality and low-cost biological high-molecular variety indicators for downstream utilization are met

(2) compare different schemes in order to find the best

maintenance scheme with the given performance, cost and life requirements

(3) identify the weak links of reliability in the system. According to the technical and economic feasibility, take necessary maintenance measures to improve the reliability level

(4) confirm and verify reliability growth

(5) as the basis for future operation reliability allocation

(6) evaluate the inherent reliability of the repair system

(7) predict the maintainability and availability of the system in the future

in order to strengthen the management of the reliability of power generation equipment, effectively plan, organize, coordinate, control and supervise various reliability engineering technical activities within the whole life cycle of the equipment, so as to achieve the determined reliability goals, so that the regulations of the whole life cycle of the equipment raise the selling price of postal cartons and minimize the cost, In 1998, on the basis of the original "statistical evaluation method of power generation equipment reliability", the national power reliability center revised and issued the "code for reliability evaluation of power generation equipment", which more scientifically, comprehensively and systematically stipulated the statistical and evaluation methods of power generation equipment reliability