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Distributed Bayesian online fault diagnosis method for dynamic and static information of megawatt ultra-supercritical unit

An ultra-supercritical unit and fault diagnosis technology, applied in information technology support systems, instruments, data processing applications, etc., can solve the problems of ignoring the dynamic information of faults and failing to obtain diagnostic results

Active Publication Date: 2018-10-02
ZHEJIANG UNIV
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Problems solved by technology

However, the existing data analysis methods, such as principal component analysis, partial least squares method, and Fisher discriminant analysis, only consider the static information of the fault and ignore the dynamic information of the fault.
Therefore, applying it to a million-kilowatt ultra-supercritical unit cannot obtain a good diagnostic effect

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  • Distributed Bayesian online fault diagnosis method for dynamic and static information of megawatt ultra-supercritical unit
  • Distributed Bayesian online fault diagnosis method for dynamic and static information of megawatt ultra-supercritical unit
  • Distributed Bayesian online fault diagnosis method for dynamic and static information of megawatt ultra-supercritical unit

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Embodiment Construction

[0089] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples.

[0090] The present invention takes No. 7 unit of Jiahua Power Plant under Zheneng Group as an example. The power of this unit is 10000MW, which is an ultra-supercritical unit of one million kilowatts, including 46 process variables. These variables relate to pressure, temperature, flow, flow velocity, etc. . In this example, 8 typical faults of thermal power units are selected as the fault types detailed in this diagnosis process.

[0091] It should be understood that the present invention is not limited to the thermal power generation process of the above examples, and those skilled in the art can also make equivalent modifications or replacements without violating the present invention, and these equivalent modifications or replacements are all included in this application within the scope of the claims.

[0092] like figure ...

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Abstract

The invention discloses a distributed Bayesian online fault diagnosis method for dynamic and static information of a megawatt ultra-supercritical unit. The distributed Bayesian online fault diagnosismethod aims at the problem that fault types of the megawatt ultra-supercritical unit is difficult to distinguish due to diversification of fault information, and comprises the steps of adopting a Bayesian network classifier to capture the static information of faults; extracting the dynamic information of the faults by combining with a slow feature analysis algorithm; and finally, utilizing the dynamic and static fault information to construct an online fault diagnosis model for improving the accuracy rate of fault diagnosis. The distributed Bayesian online fault diagnosis method overcomes theproblem of insufficient extraction of the fault information caused by excessive variables of a large-scale coal-fired unit, effectively solves the problem of difficult online diagnosis of faults comprising diversified dynamic and static fault information, greatly improves the online diagnostic performance of the indistinguishable unit faults, and facilitates a thermal power plant to check and repair the factory effectively and timely, thereby ensuring the safe and reliable operation of the megawatt ultra-supercritical generating unit.

Description

technical field [0001] The invention belongs to the field of thermal power process fault diagnosis, in particular to a distributed Bayesian online fault diagnosis method for dynamic and static information of mega-kilowatt ultra-supercritical units. Background technique [0002] In the rapidly developing 21st century, with the improvement of industrial automation and the trend of economic globalization, the thermal power industry is developing in the direction of large-scale and complex. At the same time, in order to achieve the sustainable development of electric power, the thermal power industry is actively carrying out structural adjustments, replacing high-energy consumption small thermal power units with large-capacity, high-parameter, low-energy supercritical and ultra-supercritical units, and basically forming an ultra-supercritical unit. as the main power energy structure. For large-scale thermal power generating units, the site has the characteristics of high temper...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q10/06393G06Q50/06Y04S10/50
Inventor 赵春晖高洁
Owner ZHEJIANG UNIV
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