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Diagnostic device and diagnostic method for complete set of equipment

A technology of complete sets of equipment and diagnostic devices, applied in instruments, testing/monitoring control systems, control/regulating systems, etc., can solve problems such as abnormality and false alarms, and achieve the effect of improving diagnostic accuracy and shortening lead-in time.

Active Publication Date: 2018-12-14
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, a change in the operation mode is not an abnormality, but in the method of Patent Document 1, it may be diagnosed as an abnormality
Diagnoses a normal state as an anomaly, which as a result is the cause of a false positive

Method used

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  • Diagnostic device and diagnostic method for complete set of equipment
  • Diagnostic device and diagnostic method for complete set of equipment
  • Diagnostic device and diagnostic method for complete set of equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 It is a block diagram illustrating a diagnostic device 400 which is a first embodiment of the present invention. The plant 100 is monitored using the diagnosis device 400 .

[0053] The diagnostic device 400 includes a monitoring data generation unit 700 , a classification unit 750 , and a detection unit 800 as arithmetic means. The monitoring data generation unit 700 is composed of an operation mode evaluation unit 710 , a similar plant selection unit 720 , and a simulation signal generation unit 730 , and the detection unit 800 is composed of a state change detection unit 810 and an abnormality detection unit 820 .

[0054] In addition, the diagnosis device 400 includes a measurement signal database 510 , a plant database 520 , and a diagnosis model database 530 as databases. In addition, in figure 1 In , the database is abbreviated as DB. Electronic information is stored in the measurement signal database 510 , the plant database 520 , and the diagnosis ...

Embodiment 2

[0159] FIG. 10 is a diagram showing an embodiment when the plant 100 is a gas turbine plant. FIG. 10( a ) is a diagram illustrating a configuration when the plant 100 to be diagnosed is a gas turbine plant. The plant 100 includes a gas turbine generator 110 , a control device 120 , and a data transmission device 130 . The gas turbine generator 110 includes a generator 111 , a compressor 112 , a combustor 113 and a turbine 114 .

[0160] During power generation, the compressor 112 compresses the air sucked in to become compressed air, and sends the compressed air to the combustor 113 to be mixed with fuel and combusted. The turbine 114 is rotated by high-pressure gas generated by combustion, and the generator 111 generates power.

[0161] In the control device 120, the output of the gas turbine generator 110 is controlled according to the electric power demand. In addition, the control device 120 uses the operating data 102 measured by a sensor (not shown) provided in the ga...

Embodiment 3

[0167] Fig. 11 is a diagram showing an embodiment when the plant 100 is a boiler plant. Fig. 11(a) is a diagram showing a configuration when the plant 100 to be diagnosed is a boiler plant. This plant is a thermal power plant (generator not shown) having a boiler 200 and a steam turbine 300 driven by steam generated by the boiler 200 as main components. The boiler plant 100 is controlled to a designated load (power generation output) based on the load request command. By adjusting the valve opening degree of the steam increase / decrease valve 290, the steam flow rate 261 directed to the turbine 300 changes, and the power generation output changes.

[0168] In addition, the water / steam system has a condenser 310 that cools the steam output from the steam turbine 300 into a liquid, and a water supply system that resends the water cooled by the condenser 310 to the boiler 200 as boiler feed water. water pump 320 . In addition, although not shown in the figure, an actual plant a...

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Abstract

Provided are a diagnostic device (400) and a diagnostic method for a plant that enable diagnostic accuracy to be improved by performing a diagnosis appropriate for an operation pattern and the diagnosis to be performed using short-term operation data. The diagnostic device (400) for a plant is equipped with a detection unit (800) for diagnosing an operating state of a plant using a measurement signal indicating a measured state quantity of the plant and displays the result of the diagnosis on an image display device (940), said diagnostic device being characterized in that the detection unit (800) is constructed with a change of state detection section (810) that detects a change of state using a diagnostic model that is constructed with data obtained during a prescribed period of time and an abnormality detection section (820) that detects the presence / absence of the occurrence of an abnormality using a diagnostic model that is constructed with data for the same operation pattern data as when the change of state was detected.

Description

technical field [0001] The invention relates to a diagnostic device and a diagnostic method for a complete set of equipment. Background technique [0002] When an abnormal transient phenomenon, an accident, etc. occurs in the plant, the diagnostic device of the plant detects the occurrence of the abnormality or the accident based on the measurement data from the plant. [0003] Patent Document 1 discloses a diagnostic device using adaptive resonance theory (Adaptive Resonance Theory: ART). Here, the adaptive resonance theory ART refers to a theory for classifying multidimensional data into categories corresponding to the similarities. [0004] In the technique of Patent Document 1, first, measurement data at normal times are classified into a plurality of classes (normal classes) using the adaptive resonance theory ART. Next, the current measurement data is entered into Adaptive Resonance Theory ART and sorted into categories. When the measurement data cannot be classifie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0248
Inventor 关合孝朗林喜治村上正博深井雅之
Owner HITACHI LTD