Further diagnosis method and device for root causes of failure of main fan set

A technology of faults and units, applied in the direction of instruments, electrical testing/monitoring, control/regulation systems, etc., can solve problems such as the inability to accurately and effectively detect the root causes of main wind turbine equipment failures, improve detection accuracy, improve detection Efficiency and accurate test results

Active Publication Date: 2015-04-29
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0006] The embodiment of the present invention provides a method for in-depth diagnosis of the root cause of the failure of the main fan unit to solve the technical problem in the prior art that the root cause of the failure of the main fan unit equipment cannot be accurately and effectively detected

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  • Further diagnosis method and device for root causes of failure of main fan set
  • Further diagnosis method and device for root causes of failure of main fan set
  • Further diagnosis method and device for root causes of failure of main fan set

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0051] Aiming at the shortcomings of common fault diagnosis methods for main wind turbines, in the embodiment of the present invention, a deep diagnosis method for the root cause of faults of the main wind turbines is proposed. Deep root diagnosis, specifically, such as figure 1 shown, including the following steps:

[0052] Step 101: According to the mutual relationship between the failure places of the main wind turbine system, establish a fuzzy fault Petri network diagram;

[0053] Step 102: According to expert experience data and actual field statistical data, determine the initial credib...

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Abstract

The invention provides a further diagnosis method and a further diagnosis device for root causes of a failure of a main fan set. The method comprises the steps of constructing a fuzzy failure Petri net diagram according to a mutual relation among all failure libraries of a main fan set system; determining an initial credibility set of all the failure libraries, a failure event weight set of all the failure libraries, a failure rate set of all protection layer libraries, a threshold value set of all transition rules and a credibility set of the transition rules according to expert experience data and on-site actual statistical data; searching a transmission path of the failure library with the maximum credibility on each layer from the fuzzy failure Petri net diagram according to the information; taking the failure libraries at the start points of the determined transmission paths as the root causes of the failure in main fan set equipment. According to the further diagnosis method, the technical problem that the root causes of the failure in the main fan set equipment cannot be accurately and effectively detected in the prior art is solved, and the technical effect of effectively improving the detection accuracy and the detection efficiency is achieved.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a method and device for in-depth diagnosis of the root cause of a main wind turbine fault. Background technique [0002] As the key equipment of the fluid catalytic cracking unit, the energy recovery unit of the main fan-flue gas turbine (referred to as the main fan unit) can provide the regeneration system with the oxygen needed for coking, so as to achieve the purpose of energy recovery. The main air unit plays an important role in the field of energy saving and has considerable economic benefits, but it is very sensitive to failure. Since the main fan unit works in a high-temperature, high-speed environment, and is eroded by the high-speed catalyst dust flow, there are a large number of sudden, coupled and related failures. In order to avoid major accidents and ensure the safe production of fluid catalytic cracking unit, it is very necessary to study the fault diagnos...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0278
Inventor 胡瑾秋张来斌蔡爽田文慧
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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