JPH0125889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic inspection device for a turbine temperature detection device, and particularly to an automatic inspection device for detecting erroneous temperature detection in a turbine temperature control system.

[Prior Art] Fig. 5 is a block connection diagram showing a conventional temperature control device for a gas turbine engine. In the figure, 1 is a gas turbine engine for driving a generator (hereinafter referred to as engine), and 2 is a reduction gear. , 3 are generators, and these are mechanically linked. A turbine temperature detector 4 detects, for example, the gas temperature at the turbine inlet. A rotation detector 5 is provided around the output shaft of the engine 1. 6 controls the fuel valve 7 based on the detection outputs of the turbine temperature detector 4 and rotation detector 5 and other control signals;
A controller for obtaining a desired turbine temperature and rotational speed, and 8 a thermometer that displays the turbine temperature.

Next, we will discuss the operation. The controller 6 calculates a desired optimum fuel supply amount according to the temperature detected by the turbine temperature detector 4 and the rotation speed detected by the rotation detector 5, and controls the fuel valve 7 to the optimum opening degree according to the calculation result. , the amount of fuel supplied to the engine 1 is controlled so that the engine 1 is operated at an optimum rotational speed and below a limit temperature. Although not shown, the controller 6 detects the temperature and rotational speed of the engine 1 from start to stop, and sequentially controls the starter, auxiliary equipment, etc. based on the detected data.

[Problem that the invention seeks to solve]

Conventional turbine temperature detection devices such as those described above require reliable temperature detection in order to control the turbine temperature, and if this device malfunctions or its performance deteriorates, it may result in the inability to detect the turbine temperature or the inability to start the engine. , which could ultimately lead to a fatal turbine burnout. Also,
Currently, abnormalities in turbine temperature can only be determined by periodically monitoring the thermometer 8, but abnormalities in turbine temperature cannot be detected quickly and accurately. Furthermore, gas turbine engines have recently been increasingly used in emergency power generation systems, but as there is little track record, it is hoped that they will be more reliable before they become widespread. nothing is provided.

This invention was made in order to eliminate the problems of the conventional ones as described above, and it is determined from the turbine temperature detected by the temperature detection device of the temperature control system and the intake air temperature of the turbine independent of this temperature control system. The present invention provides an automatic inspection device for a turbine temperature detection device that compares and calculates the theoretical value of the turbine temperature and automatically inspects the performance of the temperature detection device based on the calculation result.

[Means for solving problems]

The automatic inspection device for a turbine temperature detection device of the present invention includes a temperature detection device in a temperature control system of a turbine, a power amount detection device for detecting the power amount of a generator, an intake air temperature detection device for the turbine, and a temperature detection device for detecting the power amount of a generator. an operation detection device; and an operation that calculates a theoretical value of turbine temperature from the intake air temperature when the electric power amount is below a certain value, and determines by calculation whether or not the turbine temperature deviates from the theoretical value by a set value or more. The device is provided with a control device and a display device that indicates that the temperature detection device is abnormal when the temperature is separated by a set value or more.

[Effect]

In this invention, the turbine temperature is detected in the temperature control system, and the intake air temperature of the turbine is detected at a position independent of the temperature control system,
From the intake air temperature of the turbine when the power amount of the generator is below a certain value, that is, when there is no load,
The theoretical value of the turbine temperature is obtained by adding the theoretical value and experimental value (actual value) to this intake air temperature and performing arithmetic processing. If the detected turbine temperature exceeds a reference value range set around this theoretical value, the temperature detection device should determine that there is an abnormality, display the abnormality, and take appropriate measures for the operator. instruct. In this way, an accident such as engine burnout due to overrunning of the temperature control system can be prevented by taking appropriate measures by the operator.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 2, numeral 9 is a power amount detector for detecting the power amount of the generator 3, 10 is a power converter, 11 is a turbine intake air temperature detector, and 12 is an automatic inspection circuit. Components that are the same as those shown in FIG. 5 are given the same reference numerals, and redundant explanation thereof will be omitted.

FIG. 1 is a block connection diagram showing details of the automatic inspection circuit 12. As shown in FIG. In FIG. 1, numeral 21 is a temperature detection device that detects the turbine inlet temperature as the turbine temperature and converts it into an appropriate signal, and is equipped with a temperature detector 4 and a controller 6. Reference numeral 22 denotes a power amount detection device for detecting the power amount of the generator 3, and includes a power amount detector 9 and a power converter 10. 2
3 is a turbine intake air temperature detection device, 24 is an operation detection device that detects the operating state of the engine 1 (operation at a set rotation speed or higher), and 25 is each detection device 21, 2.
An input device inputs the detection data of 2, 23, and 24 into the arithmetic control unit and converts it into a signal that can be subjected to logical judgment and arithmetic processing, and 26 is a program for executing the logical judgment and arithmetic processing shown in the flow diagram of FIG. A storage device 27 stores various data such as data, input data, and calculation results, and receives data from the input device 25 according to the contents of the program stored in the storage device 26, and executes logical judgments and calculations.
An arithmetic and control device 28 outputs the results to a storage device 26 and an output device;
This is an output device that converts the signal into a signal that can be output to the 9, auxiliary relay 30, etc.

Next, the operation will be described. Repeat this action in the third
The flowchart of the inspection process shown in the figure will be explained.

(a) First, when the engine 1 is started and is in an operating state, an automatic inspection operation is started by the output of the operation detection device 24.

(b) With the start of this automatic inspection operation, the arithmetic and control unit 27 reads the turbine temperature T1 from the temperature detection device 21 through the input device 25, reads the power amount W from the power amount detection device 22, and reads the power amount W from the power amount detection device 22. Read the intake air temperature TA from 23.

(c) Next, it is determined whether the above-mentioned electric power amount W is less than or equal to a certain value. In other words, it is determined whether or not the vehicle is in a no-load operating state.

(d) In the case of no-load operation, the theoretical value TR of the turbine temperature is obtained by adding and multiplying the above intake air temperature TA by data obtained theoretically and experimentally, and then adding a certain number to this theoretical value TR. are added or subtracted to set reference temperatures T ₁ and T ₂ with a wide range, and it is determined whether the turbine temperature TI is between T ₁ and T ₂ . In other words, it is determined how far the turbine temperature is centered around the theoretical value TR. Figure 4 shows the theoretical value TR for intake air temperature TA.
It is a graph showing the relationship.

(e) Here, the turbine temperature TI is the reference temperature T ₁ , T ₂
When the temperature is between T1 and T2, the temperature detection device 21 is determined to be normal, and when it is not between _T1 and _T2 , it is determined to be abnormal.

(f) In this way, if it is determined that there is an abnormality in step e, the content of the abnormality is output to the outside and the display device 29 is displayed.
Performs CRT screen display and printer output,
Finish the inspection process.

(g) On the other hand, if there is no abnormality, wait for the next data reading cycle, and when the reading cycle comes, repeat the operations from step b of data reading.

(h) On the other hand, if the next reading cycle has not yet arrived, it is determined whether the engine 1 is in operation.

(i) If it is determined in step h that the vehicle is not in operation, the arithmetic and control device 27 outputs to the display device 29 that the inspection result is normal.

In this way, when the turbine temperature detected by the temperature detection device 21 deviates from the theoretical value calculated based on the intake air temperature, an abnormality display is displayed and the operator is required to perform maintenance, inspection, replacement, or repair of the temperature detection device 21,
Accidents such as turbine burnout can be prevented at an early stage.

In the above embodiment, abnormalities are discovered by comparing the current turbine temperature and the theoretical value of the turbine temperature one by one. If you also have a device that outputs data, you can obtain data for reviewing the above judgment results. Also,
In the above embodiment, the turbine inlet temperature of the emergency gas turbine engine is detected, but the turbine temperature detection portion is not limited to the above.

Furthermore, although the above embodiments have described abnormality inspections under no-load conditions, abnormality inspections can be similarly performed even under load conditions by making corrections based on the power amount W and related data.

〔Effect of the invention〕

As described above, according to the present invention, an abnormality in the temperature detection device within the temperature control system can be detected using the theoretical value of the turbine temperature obtained based on the intake air temperature of the turbine detected outside the temperature control system and the temperature detection device. Since the detection is based on the difference between the detected turbine temperature and the detected turbine temperature, the abnormality can be detected quickly and accurately with a simple circuit configuration, and the automatic display of the abnormality allows the operator to make repairs, inspections, etc. This has the effect of quickly notifying the operator of work and preventing turbine burnout accidents caused by the inability to start the engine or the inability to detect turbine temperature.

[Brief explanation of drawings]

FIG. 1 is a block connection diagram of an automatic inspection circuit according to an embodiment of the present invention, FIG. 2 is a block connection diagram schematically showing a turbine temperature inspection device, and FIG.
FIG. 4 is a flowchart showing the automatic inspection process, FIG. 4 is a characteristic graph of the theoretical value of turbine temperature versus intake air temperature, and FIG. 5 is a block connection diagram showing a conventional turbine temperature inspection device. 1 is a gas turbine engine, 3 is a generator, 4 is a turbine temperature detector, 5 is a rotation speed detector, 6 is a controller, 7 is a fuel valve, 9 is a power detector, 11 is an intake air temperature detector, 21 is A temperature detection device, 22 is a power detection device, 23 is an intake air temperature detection device, 24 is an operation detection device, 27 is an arithmetic control device, and 29 is a display device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A temperature detection device installed in a temperature control system of a turbine to detect the turbine temperature, a power amount detection device to detect the amount of power of a generator operated by the turbine, and an intake air an intake air temperature detection device that detects the temperature; an operation detection device that detects the operating state of the turbine; an arithmetic control device that calculates whether or not the turbine temperature detected by the temperature detection device deviates from the set value or more by a calculation; An automatic inspection device for a turbine temperature detection device, which is equipped with a display device that indicates an abnormality based on the output of a control device. 2. The turbine temperature detection device according to claim 1, wherein the turbine temperature and the intake air temperature of the turbine or the theoretical value of the turbine temperature determined from the intake air temperature are output and recorded at regular intervals. automatic inspection equipment.