JPS6281928A - Power device temperature detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature inspection device that detects the temperature of power equipment housed in a power control distribution board or the like and inspects for abnormal conditions.

[Prior Art] FIG. 6 is an explanatory diagram showing a conventional power equipment temperature inspection device disclosed in, for example, Japanese Patent Application Laid-Open No. 58-151531.
In the figure, (1) is the power control panel, (2) is an infrared temperature detector that can detect the temperature of power equipment installed inside the power control panel (1), and (13) is the object of temperature inspection. A power semiconductor, (14) is a resistor, (15)
is a connecting conductor, and (18) is a transformer.

Next, the operation of the conventional device will be explained based on the above configuration. To check the temperature of the power control panel (1), use an infrared temperature detector (5).
), the power semiconductors (13), resistors (14), connecting conductors (15), and transformers (16) installed inside the power system m@(1) are photographed in a non-contact manner. temperature distribution can be detected.

This detected temperature data is obtained as high and low values, and
If an abnormal value is determined in advance as shown in the figure, a failure can be detected when the measured value takes a value larger than the determined value.

[Problems to be Solved by the Invention] Since the conventional temperature inspection device is configured as described above, the temperature inspection of electric power equipment is limited to only determining whether the temperature is within the predetermined limit value. , it is not possible to determine the abnormality in the process of power equipment failure progressing,
Further, since the temperature change itself in the operating state 78 is not included in the data for determining whether or not it is abnormal, there is a problem that it must be linked to other monitoring data and interpreted.

This invention was made to solve the above-mentioned problems, and it is possible to detect all abnormal points including power equipment and connecting conductors by detecting temperature changes in the poem where the abnormality has occurred. It is an object of the present invention to provide a power equipment temperature inspection device that can detect temperature changes taking into account operating conditions and can early detect the occurrence of an abnormality.

[Means for Solving the Problems] The power equipment temperature inspection device according to the present invention detects the arrangement position, operating state, and heat generation state of a plurality of power equipment and connecting conductors housed in a power control panel, and detects whether the power equipment is normal or not. The temperature data corresponding to the load condition is calculated and set by the temperature setting means at each point of temperature inspection, and the operating condition and heat generation condition are set within the allowable range for the temperature data set by the temperature setting means. Temperature difference data is set, each detection state and each set data are input, and the temperature of the power equipment and the connecting conductor is checked based on this input data to detect an abnormality.

[Operation] The power equipment temperature inspection device according to the present invention calculates abnormality determination using the temperature detection data of the temperature detection means, the load signal obtained from the power detection means, and the parameter signal that parameterizes the heat generation characteristics of the power equipment in advance. and detect it.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. Fig. 1 shows an overall circuit block diagram of the power equipment temperature inspection device according to the present embodiment, and in the figure (2) is the position of the X-axis coordinate in power control 5 (1) of the power equipment and connection conductor that are the subject. (3) is a y-axis position detector that detects the position of the y-axis coordinate of the subject on the power control panel (1). (4) is a y-axis position detector that detects the operating state of the power control panel (1). The power detector that detects, (5) is the power control"! The infrared temperature detector that non-contact detects the temperature and distribution state of the subject that generates heat, which is installed inside (1), and (8,) that generates heat. A parameter setting device that calculates and sets the temperature value due to heat generation corresponding to the normal load state of the power equipment and the connected conductor using the load state and heat generation amount of the power equipment as the subject as parameters, and (7) is the parameter setter. An alarm setting device (8) is used to set in advance the allowable limit value of the temperature difference between the set value set by the setting device (6) and the temperature detection value of the infrared temperature detector (5), and (8) is a A processing unit (9) calculates the operating status of power equipment from memory value signals, checks for abnormalities, and outputs the calculation results to the outside. (10) is an alarm that issues an alarm when the temperature difference between the initial memory value and the temperature detection value exceeds the alarm setting value, (11) is an external recorder or other measuring device This is a signal converter that allows signals to be taken out.

In Fig. 3, (13) is a power semiconductor installed inside the power side 1) and is the subject of inspection temperature, (14) is a resistor, (15) is a connecting conductor, ( 16) is a transformer (17) that allows the X-axis position of the infrared temperature detector (5) to slide, and the X-axis position detector (2).
) attached to the temperature sensor X-axis movable guide rail, (18
) is a temperature sensor y-axis movable guide rail that allows the y-axis position of the infrared temperature sensor (5) to be slid and has the y-axis position detector (3) attached thereto.

Figure 4 shows the installation state of the power equipment, and Figure 5 shows the detection state of the temperature difference distribution using an image. This shows the heat generating part.

Next, the operation of the embodiment will be described based on the configuration described above. Power semiconductor (1) housed inside the power control panel (1)
3), resistor (14), connecting conductor (15), transformer (1
s) Use an infrared temperature detector (
5) Measure the temperature and distribution state according to the amount of heat generated by the temperature sensor along the X-axis movable guide rail (17) and the temperature detector Y-axis movable guide rail (18) in the internal X-axis and Y-axis directions sequentially. To detect. Temperature detector X-axis movable guide rail (
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 By reading the y-axis position coordinate value of the detection point of the infrared temperature detector (5) using the position detector (3), the position of the subject within the panel is detected.

In addition, the load state is detected by a power detector (4) attached to a circuit of an in-panel device of the power control panel (1).

The arithmetic processing unit (8) is equipped with an infrared temperature sensor (5) that detects the load status of the power control panel (1) in the X- and Y-axis directions based on the value detected by the power detector (4). The position data inside the panel, the temperature and distribution data at each point obtained by sequentially moving to the panel are input, and the temperature distribution data inside the panel in the operating state at the time of input is based on the power equipment stored in the panel. A comparison calculation is made with the data of the rewriting town iQ memory (6) that was initially measured using the relationship between the load and the heat generation amount from the rating as a parameter.

This comparatively calculated data is displayed on a display (9), and if a temperature abnormality is detected, an alarm is issued on an alarm (10). Further, a signal is transmitted to an external recorder or other measuring device using a signal converter (11).

Based on the obtained data, we can identify the power equipment housed in the power control panel (1), namely power semiconductors (13), resistors (
14), the designed temperature value and the actually used temperature value of the connecting conductor (15), transformer (16), etc. can be read.

By sequentially detecting temperature distribution data as the load condition changes, temperature characteristic data from no load to rated load of the power control panel (1) can be obtained. If the power control panel (1) is operated for a long time, the power equipment or connection conductors installed inside may change, so temperature changes can be detected by periodically inspecting the power control panel (1). Based on this data, abnormalities in power equipment due to aging can be detected at an early stage.

FIG. 5 shows an example in which an abnormal point in the temperature distribution is detected on the display (9), and since the fault point can be confirmed by x and y coordinates, countermeasures can be easily taken.

In addition, although the case of a power control panel was explained in the above embodiment, other opening/closing mountings such as a switchboard or a single device may be used, and the same effects as in the above embodiment can be obtained.

Further, in the above embodiment, a temperature checking device has been described, but a constant temperature monitoring device may also be used, and the same effects as in the above embodiment can be obtained.

Further, although a mechanical detector is used to detect the position of the subject, the temperature detector may be configured to detect x and y position coordinates that can be read optically, and the same effects as in the above embodiments can be obtained.

[Effects of the Invention] As described above, according to the present invention, the power side [i.e.
The heating state is detected, and the temperature data corresponding to the load state during normal operation is calculated and set by the temperature setting means at each point of temperature inspection, and the above-mentioned operating state 1 heating state is set by the temperature setting means. Allowable temperature difference data is set for the temperature data, each of the above detection states and each set data is input, and based on this input data, the temperature of the above power equipment and connected conductor is checked to detect abnormalities. Since we have adopted a configuration in which power signals and temperature signals are treated as parameters, old data and new data can be compared, and all power equipment in the power control panel and This has the effect of allowing early detection of abnormalities in the connected conductor, and the effect of highly accurate temperature detection.

[Brief explanation of drawings]

Fig. 1 is an overall circuit block diagram showing a power equipment temperature inspection device according to an embodiment of the present invention, and Fig. 2 shows characteristics of power equipment temperature and load of the power equipment temperature inspection device according to an embodiment of the present invention. FIG. 3 is an explanatory diagram showing the mounting state of a power equipment temperature inspection device according to an embodiment of the present invention; FIG. 4 is an explanatory diagram showing the mounting state of a power equipment subject to temperature detection; FIG. 5 is an explanatory diagram of temperature distribution data detected as an abnormal temperature of a power equipment temperature inspection device according to an embodiment of the present invention, FIG. 6 is an explanatory diagram showing a state in which a conventional power equipment temperature inspection device is installed, The figure is an explanatory diagram of conventional temperature detection data. In fig. (1) is the power control panel, (2) is the X-axis position detector, (
3) is a y-axis position detector, (4) is a power inspection device, (5) is an infrared temperature detector, (6) is a parameter setting device, (7) is an alarm setting device, (8)
) is the arithmetic processing unit, and (9) is the display. (10) is an alarm, (11) is a signal converter, (13) is a power semiconductor, (14) is a resistor,
(15) is the connecting conductor, (1B) is the transformer,
(17) is the temperature sensor X-axis movable guide rail, (18)
is the temperature sensor y-axis movable guide rail. (19) is a power semiconductor heat generating part, and (20) is a connecting conductor heat generating part. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 2 Figure 3 Figure 4

Claims (10)

[Claims] (1) Position detection means for detecting the arrangement positions of a plurality of power devices housed in a power control panel and connecting conductors connected to each of the power devices, and a power detection device for detecting each operating state of the plurality of power devices. temperature detection means for detecting the temperature due to heat generation of the power equipment and the connecting conductor; and temperature setting means for calculating and setting temperature values due to heat generation corresponding to the normal load conditions of the power equipment and the connection conductor. , an alarm setting means for setting an allowable temperature difference between the set temperature data set by the temperature setting means and the detected temperature data detected by the temperature detecting means, and a detection position and power detection of the position detecting means. The detected value of the means, the detected value of the temperature detecting means, the temperature data of the storage means, and the setting value of the alarm setting means are each input, and the calculation is performed to check the temperature of each power equipment and connected conductor based on each input value. 1. A power equipment temperature inspection device comprising a processing means. (2) The position detecting means is configured to detect the position in x-y coordinates of a plurality of power devices and connecting conductors housed in a power control panel, respectively, as subjects. The power equipment temperature inspection device according to item 1. (3) The position detecting means includes an x-coordinate axis position detector that detects the positions of the power equipment and the connecting conductor on the x-coordinate axis of the x-y coordinate, and a y-coordinate axis position detector that detects the positions of the power equipment and the connecting conductor on the y-coordinate axis. The power equipment temperature inspection according to claim 2, characterized in that the power equipment temperature check is configured to detect the positions of the power equipment and the connecting conductor in the power control panel from the detected values of each of the position detectors. Device. (4) The temperature detecting means is constituted by an infrared temperature detector that detects the temperature of the power equipment and the connecting conductor without contact. Power equipment temperature inspection device. (5) The power equipment temperature inspection device according to each of claims 1 to 4, wherein the storage means is constituted by a rewritable storage element. (6) The storage means stores the temperature signal data and load signal data from the temperature detection means as data at the start of operation of the power equipment, and compares it with newly collected data at the next inspection to detect whether or not there is a data change. 6. The power equipment temperature inspection device according to claim 1, wherein the power equipment temperature inspection device is constructed by providing a rewritable memory for storing the temperature. (7) The arithmetic processing means is configured to include a display that displays the results of checking the temperature of each power device and the connected conductor. Power equipment temperature inspection device. (8) The arithmetic processing means is configured to include an alarm that issues an alarm in the event of an abnormality based on the results of checking the temperature of each power device and the connected conductor. The power equipment temperature inspection device described in Section 7. (9) Claims 1 to 8 are characterized in that the arithmetic processing means includes a signal converter that converts the results of checking the temperatures of each power device and the connecting conductor into electrical signals. Power equipment temperature inspection device described in each. (10) The arithmetic processing means receives a temperature signal based on the detected value of the temperature detecting means, a load signal based on the detected value of the power detecting means, and the normal load state of the power equipment and the load state set in advance by the temperature setting means. Claims 1 to 9 are characterized in that the device is configured to detect abnormal heat generation in the operating state of power equipment based on the temperature value due to heat generation in
Electric power equipment temperature inspection device as described in each section.