JP6508436B1 - Apparatus for specifying location of corona discharge, method for specifying location of corona discharge - Google Patents

Abstract

SOLUTION: A sound detection device for specifying a generation point of corona discharge in a transmission and distribution line, the sound detection device for detecting a sound in an ultrasonic frequency band, and the ultrasonic wave for specifying a generation point of corona discharge And a photographing device for photographing an image of an ultraviolet ray region at a point where the sound in the frequency band is detected.

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an apparatus for specifying the place where corona discharge occurs, and a method for specifying the place where corona discharge occurs.

  For example, there is known a technique of detecting sound in a frequency band of ultrasonic waves generated from a corona discharge and specifying the generation position of the corona discharge from the detection direction of the sound (see, for example, Patent Document 1). There is also known a technique for specifying the generation position of corona discharge from an image in the ultraviolet region (see, for example, Patent Document 2).

Unexamined-Japanese-Patent No. 9-233679 JP 2005-241624 A

  However, in the case of the former, it is difficult to pinpoint the generation position of the corona discharge with high accuracy because it depends only on the information indicating the detection direction of the sound in the frequency band of ultrasonic waves. Also, in the latter case, there is a problem that the power consumption amount is unnecessarily increased because it is necessary to always capture an image in the ultraviolet region regardless of the occurrence of corona discharge.

  Therefore, in the present invention, in order to solve radio wave interference, noise and the like caused by corona discharge at an early stage, corona discharge occurrence location where the generation location of corona discharge can be accurately determined while suppressing the power consumption. An object of the present invention is to provide a specific device and a method of specifying a place of occurrence.

The main present invention for solving the above-mentioned problems is an apparatus for specifying a generation point of corona discharge in a transmission and distribution line, and a sound detection apparatus for detecting a sound in an ultrasonic frequency band and a generation part of corona discharge In order to detect the sound in the frequency band of the ultrasonic wave as the sound detection device detects the sound in the frequency band of the ultrasonic wave, the imaging device starts to capture an image of the ultraviolet region at the point where the sound in the frequency band of the ultrasonic wave is detected. And have.

  Other features of the present invention will become apparent from the accompanying drawings and the description of the present specification.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to pinpoint the generation | occurrence | production location of a corona discharge accurately, suppressing power consumption.

It is a figure which shows the example of installation of the generation | occurrence | production location identification apparatus of the corona discharge which concerns on this embodiment. FIG. 2 is a block diagram showing a corona discharge occurrence point specifying device according to the present embodiment. It is a flowchart which shows operation | movement of the generation | occurrence | production location identification apparatus of the corona discharge which concerns on this embodiment.

  At least the following matters will be made clear by the present specification and the description of the accompanying drawings.

=== Corona Discharge ===
For example, the transmission and distribution lines installed in the steel tower are insulated by the surrounding air. However, when the crest value of the potential gradient at the surface of the transmission and distribution line reaches about 30 kV / cm, the surrounding air loses the insulating force, and a partial discharge with light and sound from the surface of the transmission and distribution line ( Corona discharge) occurs. Corona discharge is affected by various factors such as deterioration of transmission and distribution lines and weather, etc. when it occurs. However, when corona discharge occurs, it causes power loss, radio wave failure, communication failure, wire corrosion and the like. Therefore, in a power company, it is necessary to identify a corona discharge occurrence point at an early stage and to take measures to prevent corona discharge from occurring.

=== Example of installation of occurrence point identification device ===
FIG. 1 is a view showing an installation example of the corona discharge occurrence point specifying apparatus according to the present embodiment.

  The generation point specifying device 1 detects the sound of the frequency band of the ultrasonic wave so that the worker of the power company can carry out the work for preventing the generation of the corona discharge, and the ultraviolet light at the detection point of the sound It is an apparatus for capturing an image of a region. The occurrence point identification device 1 is configured to include the sound detection device 10 and the imaging device 20 in order to realize the above-described function. Although details of the sound detection device 10 and the imaging device 20 will be described later, the sound detection device 10 can detect sound in the frequency band of ultrasonic waves when corona discharge is generated from the surface of the transmission and distribution line 100. The imaging device 20 is attached to a predetermined position of the tower 200 so that an image in the ultraviolet region can be captured when corona discharge is generated from the surface of the transmission and distribution line 100. Preferably, the photographing device 20 includes a wide angle camera capable of photographing the power transmission and distribution line 100 in a wide range.

=== Configuration of occurrence point identification device ===
FIG. 2 is a block diagram showing the corona discharge occurrence point specifying apparatus according to the present embodiment.

  The occurrence point identification device 1 includes a sound detection device 10 and a photographing device 20 in order to identify the occurrence point of corona discharge.

<Sound detection device>
Corona discharge occurs with sound in the ultrasonic frequency band (20 kHz band). Therefore, the sound detection device 10 is a device that detects sound in the frequency band of ultrasonic waves in the direction of the transmission and distribution line 100 in order to roughly identify the location where the corona discharge occurs.

  The sound detection device 10 includes an input unit 101, an extraction unit 102, a determination unit 103, a storage unit 104, and an output unit 105.

  The input unit 101 is means for acquiring the sound around the transmission and distribution line 100.

  The extraction unit 102 is a means for extracting only the sound in the frequency band of ultrasonic waves from the sound acquired by the input unit 101. That is, when the sound in the frequency band of ultrasonic waves is extracted, it can be considered that corona discharge may be generated. The extraction unit 102 is configured to include, for example, a band pass filter that can extract only sound in the 20 kHz band.

  When the determination unit 103 determines whether the sound extracted by the extraction unit 102 is a sound caused by corona discharge, and determines that the sound extracted by the extraction unit 102 is a sound caused by corona discharge And means for generating a determination signal including information indicating the intensity of the ultrasonic wave. For example, the function of the determination unit 103 is realized by software processing of a microprocessor.

  The storage unit 104 includes, for example, a first storage area 104A, a second storage area 104B, and a third storage area 104C. Program data for the determination unit 103 to determine whether the sound extracted by the extraction unit 102 is a sound caused by corona discharge is stored in the first storage area 104A in advance. Also, in the second storage area 104B, as the table data to be referred to when the determination unit 103 determines whether the sound extracted by the extraction unit 102 is a sound caused by corona discharge, the second storage area 104B is used. Typical pattern data and the like regarding the sound in the frequency band of the sound wave are stored in advance. Further, in the third storage area 104C, work data and the like obtained in the process of determining whether the sound extracted by the extraction unit 102 is a sound due to corona discharge are sequentially stored. That is, the determination unit 103 determines whether the sound acquired by the input unit 101 is the sound of the frequency band of the ultrasonic wave caused by the corona discharge while referring to the table data as appropriate according to the decoding result of the program data. Do. The storage unit 104 may be a single storage unit formed by dividing the first to third storage areas 104A to 104C in the same storage area, or the first to third storage areas 104A to 104C. A plurality of storage units may be provided to form 104C in individual storage areas.

  The output unit 105 is means for outputting the determination signal generated from the determination unit 103.

  As described above, by detecting the sound in the frequency band of ultrasonic waves, it is possible to roughly identify the place where the corona discharge occurs.

<Photographing device>
The imaging device 20 is a device that captures an image of an ultraviolet light region at a point where a sound in the frequency band of ultrasonic waves is detected, using the determination signal output from the sound detection device 10 as a trigger.

  The imaging device 20 includes an input unit 201, a UV camera unit 202, a control unit 203, a storage unit 204, and an output unit 205.

  The input unit 201 is means for acquiring the determination signal output from the sound detection device 10.

  The UV camera unit 202 is a means for capturing an image of the transmission / distribution line 100 at a point where a sound in the frequency band of ultrasonic waves is detected as an image in the ultraviolet region. The UV camera unit 202 preferably includes a wide angle lens capable of photographing the transmission and distribution line 100 in a wide range.

  The control unit 203 is a unit that controls the imaging operation of the UV camera unit 202 according to a predetermined condition triggered by the determination signal acquired by the input unit 201. For example, the function of the control unit 203 is realized by software processing of a microprocessor.

  The storage unit 204 includes, for example, a first storage area 204A, a second storage area 204B, and a third storage area 204C. Program data for controlling the photographing operation of the UV camera unit 202 is stored in advance in the first storage area 204A. Further, in the second storage area 204B, typical pattern data and the like regarding an image of an ultraviolet ray region of corona discharge is stored in advance as table data to be referred to when the control unit 203 controls the photographing operation of the UV camera unit 202. ing. In the third storage area 204C, images (moving images, still images) of the ultraviolet ray area of the transmission and distribution line 100 photographed by the UV camera unit 202 are stored as data. That is, the control unit 203 controls the photographing operation of the UV camera unit 202 while referring to the table data as appropriate according to the decoding result of the program data. The storage unit 204 may be a single storage unit formed by dividing the first to third storage areas 204A to 204C into the same storage area, or the first to third storage areas 204A to 204C. A plurality of storage units may be formed in each storage area 204C.

  The output unit 205 is a means for outputting the video data stored in the storage unit 204 as a basis for specifying the place where the corona discharge has occurred.

  As described above, by verifying the video data stored in the storage unit 204, it is possible to specify the location where the corona discharge has occurred with high accuracy.

=== Operation of the occurrence point identification device ===
FIG. 3 is a flowchart showing the operation of the corona discharge occurrence point specifying apparatus according to the present embodiment. The main part of the operation in FIG. 3 is the control unit 203.

  First, the control unit 203 determines whether a determination signal including information indicating the intensity of ultrasonic waves is input to the input unit 201 (step S1). When the determination signal including the information indicating the intensity of the ultrasonic wave is not input to the input unit 201 (step S1: NO), the control unit 203 executes the determination operation of step S1 again.

  Next, when a determination signal including information indicating the intensity of the ultrasonic wave is input to the input unit 201 (step S1: YES), the control unit 203 determines whether the intensity of the ultrasonic wave is equal to or more than a predetermined value (Step S2). If the intensity of the ultrasonic wave is less than the predetermined value (step S2: NO), the determination operation of step S1 is performed again.

  Next, when the intensity of the ultrasonic wave is equal to or higher than the predetermined value (step S2: YES), the control unit 203 generates a start signal for starting the UV camera unit 202 (step S3). The UV camera unit 202 is activated according to the activation signal.

  Next, the control unit 203 acquires an image of the ultraviolet region of the transmission and distribution line 100 captured by the UV camera unit 202 (step S4).

  Next, the control unit 203 determines whether or not the image in the ultraviolet region of the transmission and distribution line 100 is an image showing corona discharge by image processing with reference to table data (step S5). If the image in the ultraviolet range of the transmission and distribution line 100 is not an image showing corona discharge (step S5: NO), the control unit 203 stops the supply of power to the UV camera unit 202 (step S6). Execute the determination operation again.

Next, when the image of the ultraviolet region of the transmission and distribution line 100 is an image showing corona discharge (step S5: YES), the control unit 203 determines the image of the ultraviolet range of the transmission and distribution line 100 captured by the UV camera unit 202. Is acquired (step S8).

  Next, the control unit 203 stores the image of the ultraviolet region of the transmission and distribution line 100 captured by the UV camera unit 202 in the third storage area 204C of the storage unit 204 (step S9).

Next, the control unit 203 determines whether the intensity of the ultrasonic wave is less than a predetermined value (step S 10 ). If the intensity of the ultrasonic wave is less than the predetermined value (step S10: YES), the control unit 203 executes the operation of step S6 again. When the intensity of the ultrasonic wave is equal to or higher than the predetermined value (step S10: NO), the control unit 203 executes the operation of step S8 again.

=== Summary ===
As described above, the corona discharge occurrence point specifying device 1 according to the present embodiment includes the sound detection device 10 that detects the sound in the frequency band of the ultrasonic wave, and the ultrasonic wave to identify the occurrence point of the corona discharge. And an imaging device 20 for capturing an image of an ultraviolet region at a point at which the sound in the frequency band is detected.

  Furthermore, the imaging device 20 starts imaging of the image of the ultraviolet region at the point where the sound in the frequency band of the ultrasonic wave is detected, triggered by the sound detection device 10 detecting the sound in the frequency band of the ultrasonic wave.

Further, the photographing apparatus 20, as a response to the sound detector 10 detects the sound of the ultrasonic frequency band, video in the ultraviolet region at the point where the sound of the ultrasonic frequency band is detected indicating a corona discharge The storage unit 204 stores the video when it is determined that the video is a video .

Furthermore, imaging apparatus 20, when the image of the ultraviolet region at the point where the sound of the ultrasonic frequency band is detected is determined not to be the image shows the corona discharge, to stop the operation.

  Furthermore, the imaging device 20 stops imaging when the sound detection device stops detecting sound in the frequency band of ultrasonic waves.

  According to the present embodiment, it is possible to accurately identify the place where the corona discharge occurs while suppressing the power consumption.

  Furthermore, the sound detection device 10 and the imaging device 20 are installed in the steel tower 200 in which the transmission and distribution line 100 is installed. According to the present embodiment, by capturing an image of the ultraviolet region of the transmission and distribution line 100 at a short distance, it is possible to accurately identify the location where the corona discharge has occurred.

  Furthermore, the sound detection apparatus 10 includes a band pass filter that extracts sound in the frequency band of ultrasonic waves.

  Furthermore, the imaging device 20 determines whether the image in the ultraviolet region is an image indicating corona discharge, based on predetermined reference data.

  The above embodiments are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. The present invention can be modified and improved without departing from the gist thereof, and the present invention also includes the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Occurrence point identification device 10 Sound detection device 20 Imaging device 101, 201 Input unit 102 Extraction unit 103 Determination unit 104, 204 Storage unit 105, 205 Output unit 202 UV camera unit 203 Control unit

Claims (8)

An apparatus for identifying a location where corona discharge occurs in a transmission and distribution line,
A sound detection device for detecting sound in an ultrasonic frequency band;
An image of an ultraviolet range at a point at which the sound in the frequency band of the ultrasonic wave is detected when the sound detection device detects the sound in the frequency band of the ultrasonic wave in order to specify the generation location of the corona discharge A shooting device to start shooting
An apparatus for specifying a place where a corona discharge occurs, comprising: The imaging device is
A storage device for storing the image when it is determined that the image in the ultraviolet region at the point where the sound in the frequency band of the ultrasonic wave is detected is an image showing corona discharge
The corona discharge occurrence point specifying device according to claim 1, further comprising: The imaging device is
3. The corona according to claim 1 , wherein the imaging is stopped when it is determined that the image in the ultraviolet region at the point where the sound in the frequency band of the ultrasonic wave is detected is not an image showing corona discharge. Discharge point identification device. The imaging device is
The apparatus according to any one of claims 1 to 3 , wherein imaging is stopped when the sound detection device stops detecting sound in the frequency band of the ultrasonic wave. The said sound detection apparatus and the said imaging device are installed in the steel tower by which the said transmission and distribution line is constructed. The generation | occurrence | production location identification apparatus of the corona discharge as described in any one of Claims 1-4 characterized by the above-mentioned. The said sound detection apparatus contains the band pass filter which extracts the sound of the frequency band of the said ultrasonic wave. The corona discharge generation | occurrence | production location identification apparatus as described in any one of the Claims 1-5 characterized by the above-mentioned. The imaging device on the basis of the reference data predetermined claimed in any one of claims 1 to 6, the image in the ultraviolet range is characterized in that determines whether a video showing a corona discharge Of the place where the corona discharge occurs. The sound detection device detects sound in the ultrasonic frequency band,
The sound of the ultrasonic frequency band is detected by the imaging device when the sound detection device detects the sound of the ultrasonic frequency band in order to specify the location of the corona discharge in the transmission and distribution line Start a shooting of an image in the ultraviolet region at the point where the corona discharge occurs.

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