JPH0442746Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a temperature inspection device for power equipment that inspects the heat generation temperature of power equipment housed in a power control panel or the like and detects abnormalities.

[Conventional technology]

FIG. 6 is an explanatory diagram showing a conventional temperature inspection device disclosed in, for example, Japanese Patent Application Laid-Open No. 58-151531. An infrared temperature detector capable of detecting the temperature of the equipment, 13 a power semiconductor whose temperature is to be checked, 14 a resistor, 15 a connecting conductor, and 16 a transformer.

Next, the operation of the conventional device will be explained based on the above configuration. The temperature of the power control panel 1 is inspected using an infrared temperature detector 5 in a non-contact manner using power equipment such as the power semiconductor 13, resistor 14, connecting conductor 15, and transformer 16 installed in the control panel 1 as objects. This can be done by detecting the temperature distribution. and,
If the detected temperature data exceeds a preset abnormal heat generation temperature (Tan) as shown in FIG. 7, a failure of the power equipment is determined.

[Problem that the invention attempts to solve]

Since the conventional temperature inspection device is configured as described above, when inspecting the abnormal heat generation temperature of power equipment, it is determined whether the detected heat generation temperature is within a preset temperature limit value and the abnormal heat generation temperature is detected. Therefore, it is not possible to determine whether there is an abnormality in the process where the failure of the power equipment is progressing, and whether the temperature change of the power equipment when the load fluctuates due to the operating condition falls into the category of abnormality. There were problems such as the fact that it was not included in the judgment data, so it had to be linked to other monitoring data to make the judgment.

This idea was made to solve the above problems, and it is possible to detect the location of an abnormality based on the temperature change when an abnormality occurs, and also to detect temperature changes that take into account ambient temperature conditions and operating conditions. The purpose of the present invention is to obtain a temperature inspection device for power equipment that can detect the occurrence of an abnormality at an early stage.

[Means for solving problems]

The temperature inspection device for power equipment according to this invention measures the temperature distribution of the power equipment at a predetermined position by adding a position detector for detecting the position of the power equipment as an object to the infrared temperature detector, and also measures the temperature distribution of the power equipment at a predetermined position. In addition to detecting the load status of the power control panel using the device, the relationship between the load status and heat generation amount is set as a parameter in advance based on the rating of the power equipment, and the temperature reference point of the power equipment at no load is corrected based on the external temperature. Abnormal heat generation in the power equipment is determined based on the temperature difference between the heat generation temperature of the power equipment extracted from the parameter setting device that has set the parameter value and the heat generation temperature measurement value measured by the infrared temperature detector. This is what I did.

[Effect]

The temperature inspection device for power equipment in this invention is
The heat generation temperature measurement value of the power equipment, which is set using the relationship between the load condition and heat generation and the external temperature compensation value of the heat generation amount as parameters from the rating of the power equipment, and the heat generation temperature measurement value measured by an infrared temperature detector. If the deviation amount exceeds the allowable limit,
It can be determined that the rise in heat generation temperature of the power equipment is due to a failure of the power equipment rather than due to load fluctuations and external temperature fluctuations.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, 2 is an X-axis position detector that detects the X-axis coordinate of the subject, 3 is a Y-axis position detector that detects the Y-axis coordinate of the subject, and 4 is a power supply that detects the operating state of the power control panel 1. Detector, 5 is power control panel 1
An infrared temperature detector that non-contact detects the temperature and distribution of a heat-generating object installed inside the
Reference numeral 6 indicates a parameter setting device that allows the load condition and heat generation amount of the power equipment, which is the object that generates heat, to be set in advance as parameters, and 7 indicates a temperature that allows the allowable limit value of the temperature difference between the parameter setting value and the temperature detector to be set in advance. 8 is a calculation processing unit that calculates the operating status of the power equipment based on the above detection data and parameter setting signals, checks for abnormalities, and outputs the calculation results to the outside; 9 is a calculation result from the calculation processing unit 8; A display that displays data by output, 10 an alarm that issues an alarm when the temperature difference between the parameter set value and the temperature detector exceeds the alarm set value, and 11 an external recorder and other measuring devices. 12 is an external temperature detector that obtains a parameter setting signal, which is a signal for correcting the temperature reference point of the electric power equipment during no-load operation based on the external temperature.

FIG. 2 is an explanatory diagram showing a state in which the power equipment temperature inspection device according to this embodiment is attached to the power control panel 1.

In the figure, 13 is a power semiconductor installed inside the power control panel 1 and is the subject of inspection temperature, 14 is a resistor, 15 is a connecting conductor, 16 is a transformer, and 17 is the X axis of the infrared temperature detector 5. The position of the X-axis position detector 2 can be slid.
Temperature sensor X-axis movable guide rail with attached, 1
Reference numeral 8 denotes a temperature detector Y-axis movable guide rail that allows the Y-axis position of the infrared temperature detector 5 to slide and to which the Y-axis position detector 3 is attached.

Figures 3a and 3b show the state in which the power equipment is installed. In figure a, 13 is a power semiconductor, 15 is a connecting conductor, and in figure b, 14 is a resistor. FIG. 4 shows the state of detection of the temperature difference distribution in the image, where 19 indicates a power semiconductor heat generating section and 20 indicates a connecting conductor heat generating section.

Next, the operation of this embodiment will be explained based on the above configuration.

Power semiconductor 1 housed inside power control panel 1
3. The infrared temperature detector 5 uses power equipment such as the resistor 14, the connecting conductor 15, and the transformer 16 as the subject.
are sequentially moved along the temperature detector X-axis movable guide rail 17 and the temperature detector Y-axis movable guide rail 18 to the X-axis and Y-axis inside the control panel, and the temperature and distribution state due to the amount of heat generated by each power equipment are measured. To detect. The X-axis position coordinate value of the detection point of the infrared temperature detector 5 is detected by the X-axis position detector 2 attached to the temperature detector X-axis movable guide rail 17, and the X-axis position coordinate value of the detection point of the infrared temperature detector 5 is detected by the The position of the subject within the board is detected by reading the Y-axis position coordinate value of the detection point of the infrared temperature detector 5 using the Y-axis position detector 3.

In addition, on the other hand, the load status of the power control panel 1 is
The power is detected by a power detector 4 attached to the equipment inside. Then, the detected load data, the position data of each power equipment that is the subject obtained when the infrared temperature detector 5 is sequentially moved in the X-axis and Y-axis directions within the control panel 1, and the temperature distribution data are The signals are respectively input to the arithmetic processing unit 8.

The arithmetic processing unit 8 uses the parameter setting device 6, which sets as a parameter the relationship between the rated load state and calorific value of each power device housed in the panel, to determine the load state of the power device corresponding to the above position data. Extract the calorific value. Then, in order to correct the temperature reference point of the power equipment under no load using the external temperature, the external temperature detected by the external temperature detector 12 is added to calculate the calorific value, and the calculated calorific value is The temperature distribution data measured by the infrared temperature detector 5 are compared and calculated (see the data characteristic diagram in FIG. 5).

The comparatively calculated data is displayed on the display 9, and when the deviation between the set temperature value and the measured temperature value is detected to be greater than the difference set by the temperature difference setting device 7, a temperature abnormality is detected. As a result, the alarm device 10 issues an alarm. It also transmits a signal to an external recorder or other measuring device via the signal converter 11. From this obtained data, the designed temperature values and the actually used temperature values of the power equipment stored in the power control panel 1, that is, the power semiconductor 13, the resistor 14, the connecting conductor 15, the transformer 16, etc. temperature difference can be read.

Furthermore, according to the data measurement method described above, by sequentially detecting temperature distribution data while changing the load state, temperature characteristic data of the power control panel 1 from no load to rated load can be obtained.

In addition, if the power control panel 1 is operated for a long time, the power equipment installed inside may change, so periodically inspect it to read the temperature changes, and use these temperature change data to check for changes over time. Abnormalities in power equipment can be detected early. Fourth
The figure shows an example in which an abnormal point in the temperature distribution is detected on the display 9. Since the fault point can be confirmed by the X and Y coordinates, countermeasures can be easily taken.

In addition, although the case of a power control board was explained in the said Example, the effect similar to the said Example can be produced|achieved also if it is other switching devices, such as a switchboard or a single device. Further, in the above embodiment, the case of a temperature checking device has been described, but it may be a constant temperature monitoring device, and the same effects as in the above embodiment can be obtained.

Furthermore, although a mechanical detector was used to detect the position of the subject, the temperature detector itself has X, which can be read optically.
A Y position coordinate detector may also be provided, and the same effects as in the above embodiment can be achieved.

[Effect of idea]

As described above, according to this invention, the heat generation temperature detection data of the device using an infrared thermometer, and the heat generation temperature setting data of the device using parameters obtained by adding the power data and temperature data of the device to the no-load temperature correction using an external temperature signal. Since we have adopted a configuration that detects changes in the temperature of the equipment by comparing the temperature with the This has the effect of allowing early detection of abnormalities due to changes and providing a highly accurate temperature detection device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a temperature checking device for electric power equipment according to an embodiment of the invention, Fig. 2 is an explanatory diagram showing the installation state of the temperature checking device for electric power equipment according to an embodiment of the invention, and Fig. 3 a and b are explanatory diagrams showing the installation state of power equipment that is the object of temperature detection, and Fig. 4 is an explanatory diagram of temperature distribution data detected as abnormal temperature by the temperature inspection device for power equipment according to an embodiment of this invention. , FIG. 5 is a parameter explanatory diagram showing the characteristics of the temperature and load of the power equipment of a temperature check device for power equipment according to an embodiment of the present invention, and FIG. 6 shows the installation state of the conventional temperature check device for power equipment. An explanatory diagram, FIG. 7, is an explanatory diagram of conventional temperature detection data. 1 is the power control panel, 2 is the X-axis position detector, 3 is the Y
Axis position detector, 4 is a power detector, 5 is an infrared temperature detector, 6 is a parameter setting device, 7 is a temperature difference setting device, 8 is an arithmetic processing unit, 9 is a display device, 10 is an alarm device, 12 is an external device Temperature detector. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] An infrared thermometer that measures the heat generation temperature of the power equipment that makes up the power control panel, an X-axis and Y-axis position detector that detects the position coordinates of the power equipment that is the object of the thermometer, and the load status of the power control panel. A power detector that detects power equipment, a parameter setting device that sets the load status and heat generation amount of power equipment as parameters, and an external temperature compensation for the no-load heat generation temperature reference point of the power equipment set in the parameter setting device. an external temperature detector for obtaining an external temperature signal for the temperature difference setting device; Based on the position signal output from the position detector and the load status signal output from the power detector, the heat generation temperature value of the corresponding power equipment is extracted from the parameter setting device, and the heat generation temperature value and the heat generation temperature measured by the infrared thermometer are extracted from the parameter setting device. An arithmetic processing device that calculates the temperature difference from the measured value and compares the temperature difference with the temperature difference limit set value, an alarm that notifies abnormal heat generation of the electric power equipment based on the comparison result, and displays the emitted temperature. A temperature inspection device for power equipment, characterized by comprising a display.