Fault diagnosis method and system for transmission chain of wind power generating set

A technology for wind turbines and fault diagnosis, applied in wind turbines, wind turbine monitoring, engines, etc., can solve problems such as inconvenience, and achieve the effect of enhancing automation level, improving power generation rate and economic benefits, and improving operation and maintenance.

Active Publication Date: 2018-10-23
GUODIAN UNITED POWER TECH
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Problems solved by technology

[0005] Thus it can be seen that the above-mentioned existing method for fault diagnosis of the drive chain of wind power generators clearly still has inconvenience and defects in structure, method and use, and needs to be further improved urgently.

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  • Fault diagnosis method and system for transmission chain of wind power generating set
  • Fault diagnosis method and system for transmission chain of wind power generating set
  • Fault diagnosis method and system for transmission chain of wind power generating set

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specific Embodiment

[0045] When the wind turbine reports a fault on the impeller speed, the intelligent fault diagnosis system first analyzes the fault tree F related to the fault state information S 1 …F n Iterate over and retrieve all the fault trees related to the fault information, that is, the impeller speed overrun fault tree F1 and the speed mismatch fault tree F2, as shown in the attached figure 2 The fault tree in F1 and attached image 3 In the fault tree F2, and from the fault information knowledge base to find the probability of occurrence of the fault state information S P (S) = 0.22, the fault tree F 1 The prior probability P(F 1 )=0.15; when F 1 When the fault state information S occurs, the probability P(S丨F 1 )=0.9, according to the Bayesian algorithm, the posterior probability P(F 1 丨S)=0.61; fault tree F 2 The prior probability P(F 2 )=0.1; when F 2 When the fault state information S occurs, the probability P(S丨F 2 )=0.3, according to the Bayesian algorithm, the poste...

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Abstract

The invention discloses a method for diagnosing the transmission chain fault of a wind generating set. The method comprises the steps that a wind generating set transmission chain fault information knowledge base of a fault tree structure is established; the knowledge base is searched according to fault feature information detected in real time, and a corresponding fault tree is located; reasoning is carried out according to preset data in the knowledge base and the bayesian network, the posterior probability P(Fn|S) of the fault trees Fn is obtained, and the probability distribution sequence of the fault trees is obtained; and retrieval is sequentially carried out according to the probability distribution sequence of the fault trees, all triggered bottom events under all the fault trees are obtained through judgment, and a fault reason diagnosis set is formed. The invention further provides a transmission chain fault diagnosing method applying the method for diagnosing the fault. The bayesian network technology is introduced on the basis of a fault tree analysis method, a powerful basis is provided for fast and effective diagnosis of the fan transmission chain fault reason, the shutdown time of the wind generating set is shortened, the manual maintenance cost is reduced, and the power generating rate and economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis of wind power generators, in particular to a fault diagnosis method and system for a transmission chain of a wind power generator. Background technique [0002] At present, while the wind power industry is booming, it is also facing the situation of frequent unit failures. Among them, since the operation of the transmission chain directly affects the performance and safety of the wind power generation unit, all the diagnosis and detection of transmission chain failures are particularly important. The existing transmission chain fault detection method mainly stays on adding more redundant detection sensor hardware and relying on manual experience to diagnose and analyze the redundant state detection information of the equipment, which makes the transmission chain fault diagnosis and detection method inefficient. , The reliability is not strong, the steps are cumbersome, and the fault inform...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00
CPCF05B2260/40F05B2260/80
Inventor 褚景春王飞李永战董健
Owner GUODIAN UNITED POWER TECH
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