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Complete plant diagnosis methods and complete plant diagnosis apparatus

A technology of complete sets of equipment and diagnostic methods, applied in the direction of electrical testing/monitoring, etc., can solve the problems of difficult construction and large amount of time series data of process signals.

Active Publication Date: 2015-03-18
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the number of years of use becomes longer, it is difficult to reconstruct the time-series data of process signals accumulated up to this point because the amount of time-series data is huge.

Method used

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  • Complete plant diagnosis methods and complete plant diagnosis apparatus
  • Complete plant diagnosis methods and complete plant diagnosis apparatus
  • Complete plant diagnosis methods and complete plant diagnosis apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] figure 1 It is a figure explaining an example in which the diagnostic apparatus of the plant which concerns on this embodiment is applied to the power generation plant 100 which is a certain target. In the power generation plant 100, a plurality of measuring instruments are provided in order to grasp the state of the plant. The value of the process signal 10 measured by each measuring device is transmitted to the monitoring control device 200 and the process computer 300 for storing the measured value via a dedicated line or a general-purpose transmission line.

[0066] The monitoring and control device 200 outputs a control signal 20 for maintaining plant operation in a desired state based on the value of the process signal 10. The output control signal 20 is input to the power generation plant 100 and also input to the plant diagnosis device 400.

[0067] The value of the process signal 10 obtained from the power generation plant 100 is accumulated in the process computer...

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Abstract

The invention provides complete plant diagnosis methods and a complete plant diagnosis apparatus. In a case of using a process signal obtained from a complete plant for abnormality or omen diagnosis, if the plant to be diagnosed is replaced or in maintenance, diagnosis results which has been accumulated previously or diagnosis functions which has been constructed in a diagnosis model can not be used, and the diagnosis model is required to be reconstructed. In the complete plant diagnosis method of the invention, a model in which correlations between input variables are modeled is maintained, input data is divided into a plurality of classes based on the correlations between the input variables, and the abnormality of the complete plant is detected based on the classes not belonging to normal classes after the classification, wherein if the complete plant is modified and the model is changed by the addition or deletion of the input variables, a new model is constructed by changing the numbers of the classes of the model.

Description

Technical field [0001] The present invention relates to the abnormal diagnosis of a plant composed of multiple devices, even if the process related to the abnormal diagnosis is newly added or deleted during maintenance after the start of operation, no rebuilding is performed, and the plant can continue Diagnosis method and device of a complete set of equipment for abnormal diagnosis. Background technique [0002] Regarding power generation plants represented by thermal power or nuclear power plants or industrial plants represented by pharmaceutical / food / chemical plants, in order to achieve stable operation of the plant, multiple process signals are monitored. [0003] Specifically, in order to grasp the status of the plant, a measuring device for measuring pressure, temperature, flow, water level, etc. is installed in each part, and the obtained process signal value display is provided to the operator. In addition, in almost all plants, the obtained process signal values ​​are sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
Inventor 楠见尚弘关合孝朗江口彻深井雅之清水悟村上正博
Owner HITACHI LTD