JPH07239254A - Fault diagnostic system for prime mover plant - Google Patents

Abstract

PURPOSE:To facilitate developing of a fault diagnostic program and improvement thereof for plant supervisors by developing a fault diagnostic program from the casual relation between diagnostic items and fault items, storing the program thus developed, retrieving the program as requested and executing. CONSTITUTION:A fault diagnostic system 100 is installed in an electric or mechanical room, e.g. a prime mover room, a generator room or a heat source room. An analog signal, a pulse signal and a digital signal are detected, respectively, by an A signal detector 01, a P signal detector 02 and a D signal detector 03 and converted into electric signals. The electric signals are fed, respectively, to an A signal input unit 04, a P signal input unit 05 and a D signal input unit 06 where they are converted into diagnostic data being fed to an operating unit 07. The operating unit 07 reads out a data representative of casual relationship between diagnostic items and fault items from a data input unit 08 and a fault diagnostic program from a program memory unit 12. The program is executed 72 and fuzzy inference is effected and operation results, i.e., fault data, are stored 10 thus developing 071 a fault diagnostic program in non- programming system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis apparatus for a prime mover plant, which uses a prime mover such as a cogeneration system, various types of power generation equipment, etc. as a drive source.

[0002]

2. Description of the Related Art In a cogeneration system (hereinafter, abbreviated as CGS) having a heat recovery system and a power generator driven by a heat engine such as a diesel engine, a prime mover, a generator, a heat source device, a heat recovery device, We are trying to use energy efficiently by combining power receiving equipment.

A failure diagnosis device for detecting the presence or absence of a failure in such a cogeneration system (CGS) is usually composed of a failure diagnosis program developed for each CGS in a general-purpose programming language.

[0004]

Generally, there is no CGS failure diagnosis device having the same configuration due to differences in construction sites and building types such as hotels, office buildings, hospitals, and factories, or differences in CGS operation patterns. further,
Since CGS is currently in widespread use, there are many CGS operation managers who are inexperienced in the operation management of CGS. Therefore, the CGS operation manager requires the CGS failure diagnosis device to have a function that can support failure recovery work. ing.

However, in the conventional CGS failure diagnosis device, as described above, since the failure diagnosis program is developed for each CGS in a general-purpose programming language, the failure of the plant required by the CGS operation manager is required. There is a problem that it cannot be improved or created to have a function to support recovery work. In other words, it is a system that cannot reflect on-site experience related to failure recovery.

The object of the present invention is to solve the above-mentioned problems and to provide C
It is an object of the present invention to provide a failure diagnosis device which enables an operation manager of a plant such as GS to easily create or improve a failure diagnosis program.

[0007]

A failure diagnosis device for a prime mover plant according to the present invention is intended to solve the above-mentioned problems, and the exhaust gas temperature of a prime mover, lubricating oil pressure, hot water temperature of a heat recovery system, steam pressure, etc. A signal detector for detecting a fault diagnosis item of a plant by an analog signal, a pulse signal and a digital signal, a signal input device for converting a detection signal of the fault diagnosis item into detection diagnosis data, a diagnosis item, a fault item,
A data input device for outputting diagnostic data such as a causal relationship between diagnostic items and fault items and a request for executing a fault diagnostic program, a data storage device for storing the diagnostic data and diagnostic results, and the diagnostic data, diagnostic results, etc. Based on a data display device that displays data, a detection signal of a failure diagnosis item input from the signal input device, and diagnostic data input from the data input device, a causal relationship between the diagnosis item and the failure item is used. Failure diagnosis program creating means for creating a failure diagnosis program by performing failure diagnosis, a program storage for storing the failure diagnosis program created by the failure diagnosis program creating means, and a failure diagnosis program from the data input device The failure diagnosis program created by the failure diagnosis program creating means based on the execution request of And allowed to output from the ram storage device characterized by comprising a failure diagnosis program execution means for executing the program.

[0008]

The detection signal of the failure diagnosis item detected by the signal detector is converted into detection diagnosis data by the signal input device and input to the failure diagnosis program creating means. On the other hand, diagnostic items,
Diagnostic data such as a failure item, a diagnostic item, and a causal relationship between the failure item and the like is input from the data input device to the failure diagnostic program creating means.

In the fault diagnosis program creating means,
A failure diagnosis is performed for each diagnostic item using the detected diagnostic data from the signal input device and the causal relationship data between the diagnostic item and the defective item from the data input device and stored in the program storage unit. When the execution request of the failure diagnosis program is output from the data input device, the failure diagnosis program execution means,
In response to this, the failure diagnostic program is output from the program storage unit and executed.

As a result, the function of creating a failure diagnosis program by a so-called non-programming method is obtained, and the failure diagnosis program can be easily created or improved, and the failure diagnosis suitable for the failure recovery of the operation pattern of the prime mover plant. A device can be provided.

[0011]

Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a hardware configuration diagram of a failure diagnosis device for a cogeneration system (CGS) according to the present invention, FIGS. 2 to 4 are flowcharts showing processing operations for creating a failure diagnosis program by a non-programming method, and FIG. It is a flow chart which shows processing operation for running a failure diagnostic program.

1 to 5 and the following description, A
The signal represents an analog signal, the P signal represents a pulse signal, and the D signal represents a digital signal.

As shown in FIG. 1, the fault diagnosis apparatus for a cogeneration system (CGS) according to the present invention defines a diagnostic item (diagnosis data) in the fault diagnosis apparatus 100.
The definition of the failure item and the causal relationship between the diagnosis item and the failure item are defined. Based on this, the failure diagnosis program creation means creates a failure diagnosis program in a non-programming method, and the failure diagnosis program execution means creates a failure diagnosis. Run the program. Here, the failure diagnosis device 100 is installed in an electric room or a machine room such as a prime mover, a generator, a heat source device, or the like.

Next, a specific configuration of the CGS failure diagnosis device 100 according to the present invention will be described with reference to FIG. The failure diagnosis device 100 includes the exhaust gas temperature of the prime mover, the lubricating oil temperature and the lubricating oil pressure, the bearing temperature of the generator, the voltage and the current, the received power, the electric energy and the current, the hot water temperature and the steam temperature of the heat recovery device, Signal detectors 01 to 0 for detecting electric signals from the steam temperature and steam pressure of the heat source device, the remaining amount and liquid level of the fuel tank, etc.
3, the signal input devices 04 to 06 for converting the detected electric signal into diagnostic data and inputting the diagnostic data to the fault diagnostic device 100, and the fault diagnostic program from the fault diagnostic program creating means 071 for creating the fault diagnostic program. The program storage 12 and the failure diagnosis program executing means 072 for executing the failure diagnosis program are provided.

Further, the failure diagnosis apparatus 100 inputs diagnostic data (to be used together with the term "definition data" hereinafter) such as diagnostic items, failure items, causal relationships between diagnostic items and failure items, and execution requests for failure diagnostic programs. A data input device 08, a data indicator 09 for displaying diagnostic items, fault items, definition data such as causal relationships between the diagnostic items and fault items, and data such as diagnostic results, and diagnostic items, fault items, and diagnostic items. A data printer 13 that prints definition data such as causal relationships with failure items and data such as diagnostic results, and definition data and diagnostics such as diagnostic items of failure diagnosis programs, failure items, and causal relationships between diagnostic items and failure items. A data storage device 10 that temporarily stores data such as results, and permanently stores definition data such as diagnostic items and failure items, and data such as diagnostic results. And a data storage unit 11.

Next, a detailed configuration of each device in the failure diagnosis device 100 will be described. The A signal detector 01 is for the exhaust gas temperature of the prime mover, the cooling water temperature, the supply air temperature, the supply air pressure, the lubricating oil temperature, the lubricating oil pressure, etc.
It also detects voltage, current, frequency, power factor, etc., and also received power, voltage, current, frequency, power factor, etc. The P signal detector 02 detects the fuel flow rate of the engine, the amount of power generated by the generator, the amount of power received, and the like.

The D signal detector 03 is an overspeed alarm for the prime mover,
Lubricant pressure drop alarm, generator overcurrent alarm,
Detects bearing temperature rise. The A signal input device 04 inputs the electric signal detected by the A signal detector 01, converts it into diagnostic data obtained when the failure diagnostic program is executed, and outputs it to the arithmetic unit
Output to 7.

The P signal input unit 05 inputs the electric signal detected by the P signal detector 02, converts it into diagnostic data, and outputs it to the arithmetic unit 0.
Output to 7. The D signal input device 06 inputs the electric signal detected by the D signal detector 03, converts it into diagnostic data, and outputs it to the computing unit 07. The arithmetic unit 07 comprises a failure diagnosis program creating means 071 and a failure diagnosis program executing means 072. The program creating means 071 creates a failure diagnosis program by a non-programming method, and the failure diagnosis program executing means 072 executes the program. Run.

That is, in the arithmetic unit 07, the failure diagnosis program creating means 071 creates the failure diagnosis program stored in the program storage unit 12, and the failure diagnosis program executing means 072 executes the failure diagnosis program.
Diagnostic data is input from each signal input device 04, 05, 06 at regular intervals, and arithmetic processing such as fuzzy inference is performed.
The failure data that is the calculation result is stored in the data storage device 10 and the data storage device 11. The program storage unit 12 inputs the diagnostic data created by the failure diagnostic program creating means 071 and performs an operation for failure determination,
Stores a program that executes output of diagnostic results.

Table 1 shows an example of diagnostic data (definition data) showing a causal relationship between diagnostic items and failure items set in the data input device 08 and the like.

[0021]

[Table 1]

Next, the procedure for creating the failure diagnosis program will be described with reference to the flow charts shown in FIGS.
The data input device 08 detects that an A signal diagnostic item has been input from the outside, that is, detects a request for defining the A signal diagnostic item, and outputs it to the failure diagnostic program creating means (hereinafter abbreviated as creating means) 071. (Step A01). The creating means 071 outputs the definition permission of the A signal diagnostic item to the data display 09, and the data display 09 displays the definition permission (step A02). The data input device 08 inputs the A signal diagnostic item and outputs it to the creating means 071, and the creating means 071.
Is output to the data storage device 10, and this processing is repeated until the definition is completed (step A03).

The data input device 08 detects the request for defining the P signal diagnostic item and outputs it to the creating means 071 (step A).
04). The creating means 071 outputs the definition permission of the P signal diagnostic item to the data display 09, and the data display 09 displays the definition permission (step A05). Data input device 0
8 inputs the P signal diagnostic item and outputs it to the creating means 071, and the creating means 071 outputs it to the data storage unit 10 and repeats this processing until the definition is completed (step A06).

The data input device 08 detects the definition request of the D signal diagnostic item and outputs the definition request to the creating means 071 (step A07). The creating means 071 outputs the definition permission of the D signal diagnostic item to the data display 09, and the data display 09 displays the definition permission (step A08). The data input device 08 inputs the D signal diagnostic item, and the creating means 07
1, and the creating means 071 outputs the data to the data storage device 10 and repeats this process until the definition is completed (step A0).
9). The data input device 08 detects the request for defining the defective item and outputs it to the creating means 071 (step A10).

The creating means 071 outputs the definition permission of the failure item to the data display 09, and the data display 09 displays the definition permission (step A11). The data input device 08 inputs the failure item and outputs it to the creating means 071. The creating means 071 outputs the data to the data storage device 10 and repeats this processing until the definition is completed (step A12). Creating means 07
1 detects a request for definition of a causal relationship between failure diagnoses, and creates 0
It outputs to 71 (step A13).

The creating means 071 outputs the fault diagnosis causal relationship definition permission to the data display 09, and the data display 09 displays the definition permission (step A14). The data input device 08 inputs the failure diagnosis causal relationship and outputs it to the creating means 071. The creating means 071 outputs the data to the data storage device 10 and repeats this processing until the definition is completed (step A15). The creating unit 071 saves the created failure diagnosis data in the data saver 11 (step A16).

Next, with reference to FIG. 5, a procedure for executing the failure diagnosis program will be described. The data input device 08 detects the execution request of the failure diagnosis program and outputs the execution request to the failure diagnosis program execution means (hereinafter abbreviated as execution means) 072 (step B01). The execution means 072 outputs the execution permission of the failure diagnosis program to the data display 09, and the data display 09 displays the execution permission (step B).
02).

The execution means 072 inputs the failure diagnosis program from the program storage 12 and starts execution (step B03). Execution means 072 is A signal input device 04, P
Each diagnostic data is input from the signal input device 05 and the D signal input device 06 (step B04). The executing means 072 diagnoses by performing fuzzy inference and calculation based on the causal relationship of the failure diagnosis (step B05). The execution means 072 outputs the calculation result (diagnosis result) to the data display 09, and the data display 09 displays the calculation result (step B06).

[0029]

As described above, according to the present invention, the failure diagnosis program created by the failure diagnosis program creating means having the function of creating the failure diagnosis program by the non-programming method is stored in the program storage unit. Since the program stored in the storage device is output by the failure diagnosis program executing means and is executed, the operation manager of the prime mover plant can easily create or improve the failure diagnosis program. , Early detection of plant failure and quick and accurate recovery can be performed.

[Brief description of drawings]

FIG. 1 is a hardware configuration diagram (block diagram) of a cogeneration system (CGS) according to an embodiment of the present invention.

FIG. 2 is a flowchart in the above embodiment.

FIG. 3 is a flowchart in the above embodiment.

FIG. 4 is a flowchart in the above embodiment.

FIG. 5 is a flowchart in the above embodiment.

[Explanation of symbols]

01-03 ... Signal detector, 04-06 ... Signal input device, 0
7 ... arithmetic unit, 071 ... failure diagnosis program creating means, 0
72 ... Failure diagnosis program executing means, 08 ... Data input device, 09 ... Data display device, 10 ... Data storage device, 11 ...
Data storage device, 12 ... Program storage device, 13 ... Data printing device, 100 ... Failure diagnosis device.

Claims (1)

[Claims] 1. A signal detector for detecting failure diagnosis items of a prime mover plant, such as exhaust gas temperature of a prime mover, lubricating oil pressure, hot water temperature of a heat recovery system, steam pressure, etc., by analog signals, pulse signals and digital signals, A signal input device that converts detection signals of failure diagnostic items into detection diagnostic data, and a data input device that outputs diagnostic data such as diagnostic items, failure items, causal relationships between diagnostic items and failure items, and execution requests for failure diagnostic programs. A data storage device for storing the diagnostic data and the diagnostic result, a data display device for displaying the diagnostic data, data such as the diagnostic result, a detection signal of the fault diagnostic item input from the signal input device, and the data Based on the diagnostic data input from the input device, the failure diagnosis is performed by performing the failure diagnosis using the causal relationship between the diagnosis item and the failure item. And a program storage unit for storing the failure diagnosis program created by the failure diagnosis program creation unit; and the failure diagnosis program creation unit based on an execution request of the failure diagnosis program from the data input unit. A failure diagnosis device for a prime mover plant, comprising: a failure diagnosis program created by a program creation means; and a failure diagnosis program execution means for outputting the failure diagnosis program from the program storage unit to execute the program.