JPS61104124A - Automatic inspection device of turbine temperature detector - Google Patents

Abstract

PURPOSE:To perform abnormality detection quickly and correctly by comparing the theoretical turbine temperature calculated based on the intake temperature under a condition of a fixed power quantity or less with the turbine temperature actually detected for abnormality detection. CONSTITUTION:Detected signals from a temperature detector 21, a power quantity detector 22, and an intake temperature detector 23 are fed to an arithmetic control unit 27. The theoretical turbine temperature is determined by adding and multiplying the data determined theoretically and experimentally to the intake temperature under a condition of a fixed power quantity or less. This theoretical value is compared with the temperature from the detector 21, and when the difference is a preset value or more, an abnormality is outputted on a display unit 29. Accordingly, abnormality detection can be performed quickly and correctly.

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.

[Conventional technology]

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).
, 2 is a speed reducer, and 3 is a generator, which 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 is a controller for controlling the fuel valve 7 based on the detected outputs of the turbine temperature detector 4 and rotation detector 5 and other control signals to obtain a desired turbine temperature and rotational speed; 8 is a controller for displaying the turbine temperature; You can get a thermometer.

Next, we will discuss the operation. The controller 6 calculates a desired optimum gas supply i according to the temperature detected by the turbine temperature detector 4 and the rotation speed detected by the rotation detector 5.

The fuel valve 7 is controlled to an optimum opening degree according to the calculation result, and the amount of gas supplied to the engine 1 is controlled so that the engine 1 is operated at an optimum rotational speed and a temperature below the limit temperature. Although not shown in the drawings, the controller 6 detects the temperature and one rotational speed of the engine 1 from start to stop, and sequentially controls the starting device, 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. Further, currently, abnormalities in turbine temperature are only determined by periodically monitoring the thermometer 8, and abnormalities in turbine temperature cannot be detected quickly and accurately. Furthermore, gas turbine engines have recently been increasingly used in emergency power generators, 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]

An automatic inspection device for a turbine temperature detection device according to the present invention includes a temperature detector in a temperature control system of a turbine, a power amount detection device for detecting the amount of power of a generator, an intake air temperature detection device for the turbine, and a temperature detection device for detecting the amount of power of a generator. an operation detection device, and when the electric energy is below a certain value, calculates a theoretical value of a turbine temperature from the intake air temperature, and determines by calculation whether or not the turbine temperature deviates from the theoretical value by a set value or more. It may be equipped with an arithmetic control device and a display device that indicates that the temperature detection device is abnormal when the temperature is away from the temperature by a set value or more.

[For production]

In this invention, in addition to detecting the turbine temperature in the temperature control system, the intake air temperature of the turbine is also detected at a position independent of the temperature control system, and when the electric 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 from the intake air temperature of the turbine at the time of the condition, by adding a theoretical value and an experimental value (actual value) to the 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, accidents such as overrunning of the temperature control system and burnout of the engine 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. 23 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, 22゜23.2
4 is an input device that inputs the detected data into the arithmetic control device and converts it into a signal that can be subjected to logical judgment and arithmetic processing; 26 is a program or input data for executing the logical judgment and arithmetic processing shown in the flow diagram of FIG. A storage device 27 that stores various data such as calculation results takes in data from the input device 25 according to the contents of the program stored in the storage device 26, executes logical judgments and calculations, and stores the results in the storage device 26 or output. Arithmetic control unit 128 that outputs to the device
is an output device that converts the calculation result into a signal that can be output to an external display device 29, auxiliary relay 30, etc.

Next, the operation will be described. This operation will be explained with reference to the flowchart of the inspection process shown in FIG.

ta+ 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.

Ib) With the start of this automatic inspection operation, the arithmetic and control unit 27 reads the turbine temperature TI 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.

(al) Next, it is determined whether or not the wattmeter W is below a certain value. In other words, it is determined whether or not it is in a no-load operating state.

td) In the case of no-load operation, the intake air temperature T
The theoretical value TR of the turbine temperature is obtained by adding and multiplying A by data obtained theoretically and experimentally, and then adding and subtracting a certain number to this theoretical value TR to obtain a reference source 1T11T with a wide range.
2fr is set, and it is determined whether the talvin temperature TI is between Tl and 12. That is, it is determined how far away the turbine temperature is from the theoretical value TR. FIG. 4 is a graph showing the relationship between the theoretical value TR and the intake air temperature TA.

(al Here, the turbine temperature TI is the reference temperature T1, 12
When the temperature is between Tl and 12, the temperature detection device 21 is determined to be normal, and when it is not between T1 and T12, it is determined to be abnormal. .

(fl In this way, if it is determined that there is an abnormality in step +eJ, the data indicating the abnormality is output to the outside, the abnormality is displayed on the display device 29 with light or sound, and the inspection process is completed. .

Ig) On the other hand, if there is no abnormality, wait for the next data reading cycle, and when the reading cycle comes, the data reading step (bl
Repeat the following actions.

(b) 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 (bl) that the vehicle is not in operation, the arithmetic and control device 27 outputs a signal indicating that the inspection result is normal to the display device 29.

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 message is displayed, and the operator is required to perform maintenance inspection, replacement, or repair of the temperature detection device 21, thereby preventing turbine burnout or the like. Accidents can be prevented in their early stages.

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 detects the temperature of the turbine, you can obtain data to review the above judgment results.6Also, in the above embodiment, the temperature at the turbine inlet of the emergency gas turbine carrot is detected. It is not limited to the above.

Furthermore, in the above embodiment, abnormality inspection was described during no-load conditions, but even when under load, the above-mentioned electric power W
If correction is made using related data, abnormality inspection can be carried out in the same way.

〔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 error in comparison with 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 carry out repairs, inspections, etc. This is effective in preventing turbine burnout accidents due to the inability to start the engine or the inability to detect the turbine temperature by providing prompt notification.

[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 temperature inspection device for a Shijiku turbine, and Fig. 3 shows the processing process of automatic inspection. Flow diagram, Figure 4 is a characteristic graph of theoretical value of turbine temperature vs. intake air temperature, Figure 5 is a block connection diagram showing a conventional turbine temperature checker (1). 1 is a gas turbine engine, 3 is a generator , 4H turbine temperature detector, 5 a rotation speed detector, 6 a controller, 7 a fuel valve, 9 a power detector, 11 an intake air temperature detector, 21 a temperature detection device, 22 a power detection device , 23 is an intake air temperature detection device, 24 is an operation detection device, 27 is an arithmetic control device, 29
is a display device. Note that the same reference numerals in Figure 1 indicate the same or equivalent parts. 21:jMA product ratio device 22: ? 1st cedar, 23rd: 1st 26: Recording device 27: 3rd time control device 3: Kankan - Figure 3 Figure 4 1 Suction! ltTomo TA Figure 5 Procedural amendment (voluntary) 21 Title of invention Automatic inspection device for turbine temperature detection device 3 Relationship with the person making the amendment Case 1Φ Applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Title (601) Mitsubishi Electric Corporation Representative Piece 1
11f-8 Part 4, Agent Postal Code 105 Address
No. 4-10 Nishi-Shinbashi 1-chome, Minato-ku, Tokyo (1) Claims column of the specification ㅅ1.4.1'1 a Contents of amendment 7, Scope of patent claims after amendment to list of attached documents A document stating one or more amended claims (1) A temperature detection device installed in a temperature control system of a turbine to detect the turbine temperature, and a temperature detection device that detects the amount of electric power of a generator operated by the turbine. A power amount detection device,
an intake air temperature detection device that detects the intake air temperature of the turbine; an operation detection device that detects the operating state of the turbine;
When the above-mentioned electric energy is below a certain value, calculate the theoretical value of the turbine temperature from the above-mentioned intake air temperature, and calculate whether the turbine temperature detected by the above-mentioned temperature detection device deviates from this theoretical value by more than a set value. An automatic inspection device for a turbine temperature detection device, comprising: an arithmetic and control device that calculates the temperature by a set value; and a display device that displays an abnormality based on the output of the arithmetic and control device when it is determined by this calculation that the temperature is greater than a set value. (2) The turbine 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 outputted and recorded at regular intervals. Automatic inspection device for temperature detection device.

Claims (2)

[Claims] (1) A temperature detection device installed in a temperature control system of the 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 a temperature detection device to detect the intake air temperature of the turbine. an intake air temperature detection device; an operation detection device that detects the operating state of the turbine; an arithmetic and control device that calculates whether or not the turbine temperature detected by the temperature detection device deviates by a set value or more; and an output of the arithmetic and control device when it is determined by this calculation that the turbine temperature deviates by a set value or more; An automatic inspection device for a turbine temperature detection device, which is equipped with a display device that indicates an abnormality. (2) The turbine temperature detection device according to claim 1, wherein the turbine temperature and the theoretical value of the turbine temperature determined from the intake air temperature of the turbine are compared and calculated at regular intervals. Automatic inspection device.