Bathtub failure curve based hydroelectric unit deterioration evaluation method

A failure curve and hydroelectric unit technology, applied in the direction of instruments, data processing applications, resources, etc., can solve the problems that do not conform to the actual degradation of the unit, and cannot fully reflect the comprehensive degradation degree of the hydroelectric unit.

Active Publication Date: 2016-01-13
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The current assessment adopts a simple single limit value method, which does not conform to the actual deterioration of the unit
Secondly, in our country, the evaluation is mostly based on the vibration measurement results of the key points of the unit components, which does not include the characteristics of the unit’s initial design problems and gradual defect changes, and cannot fully reflect the comprehensive degradation degree of the hydropower unit.

Method used

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  • Bathtub failure curve based hydroelectric unit deterioration evaluation method
  • Bathtub failure curve based hydroelectric unit deterioration evaluation method
  • Bathtub failure curve based hydroelectric unit deterioration evaluation method

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] see figure 1 with figure 2 , a kind of hydroelectric unit deterioration assessment method based on bathtub failure curve of the present invention, comprises the following steps:

[0047] Step 1: Build a deterioration evaluation model, including a conventional numerical evaluation model and a vibration area change evaluation model;

[0048] (A) Construct a conventional numerical evaluation model:

[0049]

[0050] Among them, L r_e1 is the deterioration evaluati...

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Abstract

The invention discloses a bathtub failure curve based hydroelectric unit deterioration evaluation method. The method takes full account of a bathtub failure path of a unit from installation to final extended service. Three different deterioration models are adopted to evaluate single indicators, so that early, middle and late deterioration degrees of the unit can be accurately characterized by different indicators of the unit. Meanwhile, family defects, inspection records and other site data are considered, and variable-weight weighted calculation is performed on indicators of various aspects, so that the comprehensive deterioration degree and grade of the unit are finally obtained, and maintenance decision and extended service running of the unit is guided. The method can effectively evaluate the deterioration degree of the hydroelectric unit, and has very good economic benefits and engineering values.

Description

technical field [0001] The invention relates to the field of state evaluation of hydroelectric units, in particular to a method for evaluating degradation of hydroelectric units based on bathtub failure curves. Background technique [0002] With the increasing calls for global response to climate change and the increasingly severe situation of energy shortage and energy supply security, hydropower, as a renewable energy source, is constantly improving its status in the energy strategies of various countries because of its clean, safe and sustainable characteristics. However, as the hydroelectric unit is affected by factors such as erosion, wear, and interactive stress during operation, the performance of each component will gradually degrade with the increase of service time. The reliability of its equipment performance has an important impact on the safety and stability of the power grid. If a failure occurs, it may cause the unit to be shut down for maintenance, thereby di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
Inventor 唐卫平肖剑寇攀高田海平黄波
Owner STATE GRID CORP OF CHINA
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