JP2021128058A - Partial discharge detection system - Google Patents

Abstract

To obtain a partial discharge detection system with which it is possible to indicate a position at which a partial discharge has occurred in an easily understandable way.SOLUTION: The partial discharge detection system comprises: a partial discharge detection device 2 for detecting a partial discharge occurring in an electric apparatus; and a processing device 3 for processing discharge data acquired by detection of the partial discharge. The processing device 3 includes: a discharge position estimation unit 24 for estimating, on the basis of the discharge data, a position where a partial discharge has occurred; and an image generation unit 22 for generating a detection result image in which an element representing the occurrence position of the partial discharge is added to a stereoscopic image of the electric apparatus.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a partial discharge detection system having a partial discharge detection device.

Partial discharge is a minute discharge generated by the concentration of an electric field on a defective portion of an insulating material, and is a phenomenon that occurs in the initial stage of deterioration leading to dielectric breakdown. Conventionally, there is known a method of estimating a position where a partial discharge occurs by detecting a sound wave propagating in an insulating medium from a position where a partial discharge occurs by a plurality of AE (Acoustic Emission) sensors. The timing at which sound waves are detected by each AE sensor changes according to the distance between the position where the partial discharge occurs and the AE sensor. It is possible to estimate the position where the partial discharge occurred based on the result of obtaining the delay time from the timing when the discharge current flowing with the occurrence of the partial discharge to the detection of the sound wave is delayed for each AE sensor. can.

Patent Document 1 discloses a partial discharge detection system that monitors the occurrence of partial discharge in an electric device, and displays an image showing a partial discharge detection result in a user interface unit installed in a monitoring room. .. The image showing the detection result of the partial discharge includes a device icon symbolizing the electric device and a discharge icon symbolizing the partial discharge generated in the electric device. The device icon replaces the appearance of an electrical device with a simple plane figure such as a quadrangle. In the image, the position of the discharge icon in the device icon represents the estimation result of the position where the partial discharge occurs.

Japanese Unexamined Patent Publication No. 2016-148575

In the conventional partial discharge detection system disclosed in Patent Document 1, the electric device is displayed by being replaced with a simple plane figure different from the actual shape of the electric device. For this reason, it is difficult for an operator who maintains and manages an electric device to accurately understand the position where a partial discharge occurs in the actual electric device from the image displayed by the system. As described above, according to the prior art, the partial discharge detection system has a problem that the position where the partial discharge occurs cannot be clearly indicated.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a partial discharge detection system capable of clearly indicating the position where a partial discharge has occurred.

In order to solve the above-mentioned problems and achieve the object, the partial discharge detection system according to the present disclosure includes a partial discharge detection device for detecting a partial discharge generated in an electric device and discharge data acquired by detecting the partial discharge. It is provided with a processing device for processing. The processing device generates a detection result image in which an element representing the partial discharge occurrence position is added to the stereoscopic image of the electric device and the discharge position estimation unit that estimates the position where the partial discharge occurs based on the discharge data. It has a generator and a generator.

The partial discharge detection system according to the present disclosure has the effect of being able to clearly indicate the position where the partial discharge has occurred.

The figure which shows the partial discharge detection system which concerns on Embodiment 1. Block diagram of the partial discharge detection device constituting the partial discharge detection system according to the first embodiment. The figure for demonstrating the calculation of the delay time by the partial discharge detection apparatus shown in FIG. A block diagram showing a functional configuration of a processing device constituting the partial discharge detection system according to the first embodiment. The first figure which shows the example of the stereoscopic image generated by the processing apparatus shown in FIG. FIG. 2 shows an example of a stereoscopic image generated by the processing apparatus shown in FIG. The figure which shows the example of the detection result image displayed by the processing apparatus shown in FIG. A flowchart showing an operation procedure of the partial discharge detection device constituting the partial discharge detection system according to the first embodiment. A flowchart showing an operation procedure of the processing apparatus constituting the partial discharge detection system according to the first embodiment. A block diagram showing a functional configuration of a processing device constituting the partial discharge detection system according to the second embodiment. The figure which shows the example of the detection result image displayed by the processing apparatus shown in FIG. The figure which shows the example of the hardware composition provided in the processing apparatus which comprises the partial discharge detection system which concerns on Embodiment 1 or 2.

Hereinafter, the partial discharge detection system according to the embodiment will be described in detail with reference to the drawings. The present disclosure is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a diagram showing a partial discharge detection system according to the first embodiment. The partial discharge detection system 1 includes a partial discharge detection device 2, a processing device 3, and a camera 4. The partial discharge detection device 2 detects the partial discharge generated in the high voltage device. A high voltage device is an electric device to which a voltage higher than the voltage of a commercial power source is applied. In the first embodiment, the partial discharge detection device 2 detects the partial discharge generated in the transformer 5 which is a high voltage device. Oil, which is an insulating medium, is sealed inside the transformer 5.

The partial discharge detection device 2 has a plurality of AE sensors 6 and a high frequency current transformer (CT) 7. Each AE sensor 6 is detachably arranged on the outer surface of the transformer 5. Each AE sensor 6 is a sensor that detects a sound wave propagating from a position where a partial discharge occurs. The AE sensor 6 is attached to the wall surface of the tank constituting the transformer 5, or near the bushing constituting the transformer 5. In the first embodiment, the transformer 5 is arranged with four AE sensors 6. FIG. 1 shows two of the four AE sensors 6. The number of AE sensors 6 arranged in the transformer 5 may be 3 or more, and is arbitrary.

The high frequency CT 7 is attached to the ground wire 8 connected to the transformer 5. The high frequency CT 7 detects the discharge current flowing through the ground wire 8 as the partial discharge occurs. The device for detecting the discharge current may be a device other than the high frequency CT7, or may be a Rogowski coil or the like. The device for detecting the discharge current may be attached to other than the ground wire 8. The device that detects the discharge current may be attached to, for example, a bushing.

The processing device 3 processes the discharge data acquired by detecting the partial discharge. The processing device 3 displays a search result screen showing the detection result of the partial discharge. The processing device 3 is installed in a control room or the like of a facility including a transformer 5. The partial discharge detection device 2 and the processing device 3 are connected to each other so as to be able to communicate with each other. The partial discharge detection device 2 and the processing device 3 are connected via a network by wireless communication or a network by wired communication.

The camera 4 photographs the appearance of the transformer 5. The camera 4 transmits the video data acquired by shooting to the processing device 3. The processing device 3 and the camera 4 are connected via a wireless communication network or a wired communication network. The camera 4 is a fixed camera installed around the transformer 5. The camera 4 acquires video data about the entire appearance of the transformer 5 by photographing the appearance of the entire appearance of the transformer 5 at 360 degrees.

The video data of the appearance of the transformer 5 may be acquired by installing a plurality of cameras 4 around the transformer 5. The camera 4 is not limited to a fixed camera, and may be a portable camera. The portable camera is arranged around the transformer 5 when shooting the transformer 5, and is removed from the periphery of the transformer 5 after shooting. The camera 4 may be installed on a moving body traveling around the transformer 5 or a flying body flying around the transformer 5. As the camera 4 moves around the transformer 5 to take a picture, the camera 4 takes a picture of the entire transformer 5. The camera 4 may be either a monocular camera or a stereo camera.

Next, the configuration and operation of the partial discharge detection device 2 will be described. FIG. 2 is a block diagram of a partial discharge detection device constituting the partial discharge detection system according to the first embodiment. The high frequency CT7 outputs a discharge current signal by detecting the discharge current. Each AE sensor 6 outputs an acoustic signal by converting a sound wave into an electric signal. The partial discharge detection device 2 includes filter units 11, 12, amplifiers 13, 14, synchronous detector 15, analog-to-digital (A / D) converter 16, CPU (Central Processing Unit) 17, and communication device. Has 18.

The filter unit 11 removes frequency components unnecessary for detecting partial discharge from the discharge current signal. The amplifier 13 amplifies the discharge current signal and outputs the amplified discharge current signal to the A / D converter 16. The filter unit 12 removes frequency components unnecessary for estimating the position where the partial discharge occurs from the acoustic signal. The amplifier 14 amplifies the acoustic signal and outputs the amplified acoustic signal to the A / D converter 16. The synchronization detector 15 synchronizes the discharge current signal input to the A / D converter 16 with the acoustic signal input to the A / D converter 16.

The A / D converter 16 converts a discharge current signal, which is an analog signal, into a digital signal. The A / D converter 16 outputs the discharge current signal converted into a digital signal to the CPU 17. The A / D converter 16 converts an acoustic signal, which is an analog signal, into a digital signal. The A / D converter 16 outputs an acoustic signal converted into a digital signal to the CPU 17.

The CPU 17 discriminates between the discharge current signal and the external noise, and determines the presence or absence of partial discharge. When the CPU 17 determines that there is a partial discharge, the CPU 17 calculates the amount of discharge charge based on the current value of the discharge current. Further, when the CPU 17 determines that there is a partial discharge, the CPU 17 calculates the delay time of the acoustic signal from the discharge current signal for each AE sensor 6. The CPU 17 outputs the discharge data including the calculation result of the discharge charge amount and the calculation result of the delay time to the communication device 18. The communication device 18 transmits the discharge data to the processing device 3.

FIG. 3 is a diagram for explaining the calculation of the delay time by the partial discharge detection device shown in FIG. FIG. 3 shows a waveform representing a change in the discharge current signal and a waveform representing a change in the acoustic signal output from each AE sensor 6 with the horizontal axis as time. In the following description, the acoustic signal output by the first AE sensor of the four AE sensors 6 is the acoustic signal A, and the acoustic signal output by the second AE sensor of the four AE sensors 6 is the acoustic signal B, 4 The acoustic signal output by the third AE sensor of the four AE sensors 6 is referred to as the acoustic signal C, and the acoustic signal output by the fourth AE sensor of the four AE sensors 6 is referred to as the acoustic signal D.

The high frequency CT 7 outputs a discharge current signal at the timing when a partial discharge occurs in the transformer 5. The partial discharge detection device 2 acquires an acoustic signal using the discharge current signal as a trigger. The sound wave generated by the partial discharge propagates through the insulating medium inside the transformer 5 and reaches each AE sensor 6. The delay time from the timing at which the discharge current signal is output to the time when the acoustic signal is output is delayed according to the distance between the position where the partial discharge occurs and the AE sensor 6. The CPU 17 calculates the delay time Δt1, which is the interval between the time t0 at which the discharge current signal is output by the high-frequency CT7 and the time t1 at which the acoustic signal A is output by the first AE sensor. The CPU 17 calculates the delay times Δt2, Δt3, and Δt4 for the second, third, and fourth AE sensors in the same manner as the delay time Δt1 for the first AE sensor.

The transformer 5 is provided with a tap changer that switches taps for voltage adjustment in the transformer 5 in the operating state. The illustration of the tap changer is omitted. The partial discharge detection device 2 treats the signal input from the high frequency CT7 during the period when the tap switch is operating as not being a discharge current signal. That is, the partial discharge detection device 2 does not detect the partial discharge during the period in which the tap switch is operating. This prevents the partial discharge detection device 2 from erroneously detecting the current associated with the operation of the tap switch as a discharge current.

Next, the configuration and operation of the processing device 3 will be described. The processing device 3 estimates the position where the partial discharge occurs based on the discharge data. The processing device 3 displays a detection result image showing an estimation result of the position where the partial discharge occurs. In the detection result image, an element representing the position where the partial discharge occurs is added to the stereoscopic image of the transformer 5. The stereoscopic image of the transformer 5 includes a portion showing the appearance of the transformer 5 and a portion showing the internal structure of the transformer 5. The stereoscopic image shows the internal structure of the portion of the transformer 5 including the position where the partial discharge occurs. Further, for each AE sensor 6, an element representing the position of the AE sensor 6 is added to the stereoscopic image.

FIG. 4 is a block diagram showing a functional configuration of a processing device constituting the partial discharge detection system according to the first embodiment. FIG. 4 shows the processing device 3, the partial discharge detection device 2 and the camera 4 connected to the processing device 3.

The processing device 3 includes an input unit 21 for inputting data, an image generation unit 22 for generating a detection result image, a communication unit 23 for receiving data, and a discharge position estimation unit 24 for estimating the position where partial discharge has occurred. And a sensor position measuring unit 25 for measuring the position of each AE sensor 6. Further, the processing device 3 has a storage unit 26 for storing information and a display unit 27 for displaying a detection result image.

Computer-aided design (CAD) data, which is design data of the transformer 5, is input to the input unit 21. The input unit 21 sends CAD data to the image generation unit 22. Further, the input unit 21 accepts an input operation by an operator. The communication unit 23 receives the discharge data transmitted by the partial discharge detection device 2. The communication unit 23 receives the video data transmitted by the camera 4. The communication unit 23 sends the discharge data to the discharge position estimation unit 24. The communication unit 23 sends video data to the image generation unit 22 and the sensor position measurement unit 25.

The discharge position estimation unit 24 estimates the position where the partial discharge has occurred based on the discharge data. The propagation velocity of sound waves inside the transformer 5 is a value peculiar to the insulating medium. The discharge position estimation unit 24 calculates the distance between the position where the partial discharge occurs and the AE sensor 6 for each AE sensor 6 by multiplying the delay time by the propagation speed. The discharge position estimation unit 24 identifies the position where the partial discharge occurs based on the distance calculated for each AE sensor 6 and the position of each AE sensor 6. The method of specifying the position where the partial discharge occurs by the discharge position estimation unit 24 is arbitrary. The discharge position estimation unit 24 outputs the discharge position data, which is the estimation result of the position where the partial discharge occurs, to the image generation unit 22.

The sensor position measuring unit 25 measures the position of each AE sensor 6 based on the video data. The sensor position measuring unit 25 measures the position of each AE sensor 6 by, for example, analyzing an image acquired by a monocular camera. The sensor position measuring unit 25 may measure the position of each AE sensor 6 by using the principle of triangulation based on the video data acquired by the stereo camera. The sensor position measurement unit 25 outputs the sensor position data, which is the measurement result of the position of each AE sensor 6, to the discharge position estimation unit 24 and the image generation unit 22.

The image generation unit 22 generates a stereoscopic image showing the internal structure of the transformer 5 based on the CAD data. The internal structure is a structure that is covered by the exterior of the electric device and cannot be visually observed unless the electric device is disassembled. The storage unit 26 stores a stereoscopic image showing the internal structure of the transformer 5. Further, the image generation unit 22 generates a stereoscopic image showing the appearance of the transformer 5 based on the video data. The image generation unit 22 generates a stereoscopic image of the appearance in a state where each AE sensor 6 is attached, based on the video data acquired when each AE sensor 6 is attached to the transformer 5. The storage unit 26 stores a stereoscopic image showing the appearance of the transformer 5.

When generating the detection result image, the image generation unit 22 reads out from the storage unit 26 a stereoscopic image showing the appearance of the transformer 5 and a stereoscopic image showing the internal structure of the transformer 5. Based on the discharge position data, the image generation unit 22 performs image processing for cutting out a portion including the position where the partial discharge occurs and its periphery from the stereoscopic image representing the internal structure. The image generation unit 22 generates a partial image of the internal structure by such image processing. The image generation unit 22 performs image processing in which a part of the stereoscopic image representing the appearance of the transformer 5 is replaced with a partial image of the internal structure. As a result, the image generation unit 22 generates a stereoscopic image in which a part of the appearance of the transformer 5 is replaced with a partial image showing the position where the partial discharge occurs inside the transformer 5.

The image generation unit 22 adds a mark, which is an element representing a partial discharge generation position, to a position indicated by the discharge position data in the generated stereoscopic image. The image generation unit 22 adds a mark, which is an element representing the position of the AE sensor 6, to the position indicated by the sensor position data in the generated stereoscopic image. The image generation unit 22 adds a mark for each AE sensor 6. The image generation unit 22 outputs the detection result image thus generated to the display unit 27. The display unit 27 displays the detection result image.

FIG. 5 is a first diagram showing an example of a stereoscopic image generated by the processing apparatus shown in FIG. FIG. 6 is a second diagram showing an example of a stereoscopic image generated by the processing apparatus shown in FIG. FIG. 5 shows an image 31 which is an example of a stereoscopic image showing the appearance of the transformer 5. The image 31 is taken by the camera 4. FIG. 6 shows an image 32 which is an example of a stereoscopic image showing the internal structure of the transformer 5. The image 32 is generated based on the CAD data. The image 31 and the image 32 are stored in the storage unit 26. It should be noted that in FIGS. 5 and 6 and FIG. 7 described later, it is assumed that there is a simplified structure of the transformer 5.

FIG. 7 is a diagram showing an example of a detection result image displayed by the processing apparatus shown in FIG. The image generation unit 22 reads out the image 31 and the image 32 from the storage unit 26. The image generation unit 22 generates a partial image 34 of the internal structure from the image 32 based on the discharge position data. The image generation unit 22 generates a stereoscopic image including the partial image 34 by replacing a part of the image 31 with the partial image 34.

The image generation unit 22 adds a mark 35 indicating a partial discharge generation position to a position indicated by the discharge position data in the partial image 34. The image generation unit 22 adds a mark 36 indicating the position of the AE sensor 6 to a position indicated by the sensor position data in the generated stereoscopic image. The image generation unit 22 adds a mark 36 for each AE sensor 6. In this way, the image generation unit 22 generates the detection result image 33. The display unit 27 displays the detection result image 33.

The display unit 27 enlarges and reduces the stereoscopic image according to the operation of the input unit 21 by the operator. The display unit 27 enlarges and reduces the entire stereoscopic image and displays it. The display unit 27 may enlarge or reduce a designated portion of the stereoscopic image and display it.

The display unit 27 may change the orientation of the stereoscopic image according to the operation of the input unit 21 by the operator. The display unit 27 can rotate the image of the transformer 5 in any direction on the screen. The display unit 27 may be capable of changing the display mode of the stereoscopic image in addition to enlarging and reducing the stereoscopic image or changing the orientation of the stereoscopic image.

Next, the operation procedure of the partial discharge detection device 2 and the processing device 3 constituting the partial discharge detection system 1 will be described. FIG. 8 is a flowchart showing an operation procedure of the partial discharge detection device constituting the partial discharge detection system according to the first embodiment. The partial discharge detection device 2 monitors the occurrence of partial discharge. In step S1, the partial discharge detection device 2 determines whether or not the partial discharge is detected in the high frequency CT7 based on the presence or absence of the discharge current signal. When the partial discharge is not detected (steps S1 and No), the partial discharge detection device 2 continues to monitor the occurrence of the partial discharge.

When the partial discharge is detected (steps S1 and Yes), in step S2, the partial discharge detection device 2 determines whether or not the sound wave due to the partial discharge is detected by each AE sensor 6 based on the presence or absence of the acoustic signal. .. When the sound wave due to the partial discharge is not detected (steps S2 and No), the partial discharge detection device 2 continues to monitor the occurrence of the partial discharge. Even if the partial discharge detection device 2 determines that the partial discharge is detected in step S1, if the sound wave due to the partial discharge is not detected, it is determined that the determination in step S1 is due to noise and there is no partial discharge. do.

When the sound wave due to the partial discharge is detected (steps S2 and Yes), in step S3, the partial discharge detection device 2 determines whether or not the tap changer is operating at the time of detection by the high frequency CT7. When the tap changer is operating (steps S3, Yes), the partial discharge detection device 2 continues to monitor the occurrence of partial discharge. If the tap changer is operating even if the partial discharge detection device 2 determines that the partial discharge is detected in step S1, the determination in step S1 is based on the operation of the tap changer, and there is no partial discharge. Judge that it was.

When the tap changer is not operating (steps S3 and No), in step S4, the partial discharge detection device 2 calculates the amount of discharge charge and the delay time for each AE sensor 6. In step S5, the partial discharge detection device 2 transmits the discharge data including the calculation result of the discharge charge amount and the calculation result of the delay time to the processing device 3. As described above, the partial discharge detection device 2 ends the operation according to the procedure shown in FIG.

The partial discharge detection device 2 may omit the step S3 regarding whether or not the tap changer has been operated in order to simplify the configuration of the partial discharge detection device 2. That is, even if the partial discharge detection device 2 calculates the discharge charge amount and the delay time when the partial discharge and the sound wave due to the partial discharge are detected regardless of whether or not the tap switch is operating. good.

FIG. 9 is a flowchart showing an operation procedure of the processing apparatus constituting the partial discharge detection system according to the first embodiment. The processing device 3 monitors the reception of discharge data. In step S11, the processing device 3 determines whether or not the discharge data has been received. When the discharge data is not received (steps S11, No), the processing device 3 continues to monitor the discharge data reception.

When the discharge data is received (steps S11 and Yes), in step S12, the processing device 3 acquires video data of the appearance of the transformer 5 from the camera 4. In step S13, the processing device 3 measures the position of each of the plurality of AE sensors 6 based on the video data. In step S14, the processing device 3 estimates the position where the partial discharge has occurred based on the discharge data. In step S15, the processing device 3 reads out the stereoscopic image of the internal structure from the storage unit 26.

In step S16, the processing device 3 generates a stereoscopic image including a portion representing the appearance of the transformer 5 and a portion representing the internal structure of the transformer 5, and marks 35 indicating the position where the partial discharge occurs, and each of them. The detection result image 33 is generated by adding the mark 36 indicating the position of the AE sensor 6 to the AE sensor 6. In step S17, the processing device 3 displays the detection result image 33. As described above, the processing device 3 ends the operation according to the procedure shown in FIG.

In the detection result image 33 displayed on the processing device 3, the mark 35 is added to the stereoscopic image of the transformer 5, so that the operator can see the transformer 5 from which direction the displayed image is viewed. It is possible to easily grasp whether it is an image in. The operator can accurately understand the position where the partial discharge occurs in the actual transformer 5 from the detection result image 33. The processing device 3 can clearly indicate the position where the partial discharge has occurred.

The stereoscopic image of the transformer 5 includes a part showing the appearance of the transformer 5 and a part showing the internal structure of the transformer 5, so that the operator can determine the position of the internal structure where the partial discharge occurs. You can check. As a result, the processing device 3 can more clearly indicate the position where the partial discharge has occurred.

When estimating the position of the partial discharge, the dimensional data of the transformer 5 is required. Since the processing device 3 acquires the video data taken by the transformer 5, the operator can save the trouble of manually inputting the dimensional data of the transformer 5. The processing device 3 can suppress a situation in which an error occurs in the estimation of the position of the partial discharge due to an error in the manually input data.

By adding the mark 36 to the stereoscopic image of the transformer 5 in the detection result image 33, the operator can easily understand the position where each AE sensor 6 is arranged in the actual transformer 5. can. The sensor position measuring unit 25 measures the position of each AE sensor 6 based on the stereoscopic image of the appearance in the state where each AE sensor 6 is attached, so that the operator can perform each without manual work. The position of the AE sensor 6 can be measured. Thereby, the work load of the worker can be reduced.

The stereoscopic image in the detection result image 33 is not limited to those including a portion showing the appearance of the transformer 5 and a portion showing the internal structure of the transformer 5. The stereoscopic image in the detection result image 33 may be a stereoscopic image showing the appearance of the transformer 5 and may not include a portion showing the internal structure. That is, the image generation unit 22 may generate a detection result image 33 in which the marks 35 and 36 are added to the image 31 showing the appearance of the transformer 5. In this case as well, the processing device 3 can clearly indicate the position where the partial discharge has occurred.

Further, the stereoscopic image in the detection result image 33 may be a stereoscopic image showing the internal structure of the transformer 5 and does not include a portion showing the appearance. That is, the image generation unit 22 may generate a detection result image 33 in which the marks 35 and 36 are added to the image 32 representing the internal structure of the transformer 5. In this case as well, the processing device 3 can clearly indicate the position where the partial discharge has occurred.

According to the first embodiment, the partial discharge detection system 1 generates a detection result image 33 in which an element indicating the position where the partial discharge occurs is added to the stereoscopic image of the electric device. As a result, the partial discharge detection system 1 has the effect of being able to clearly indicate the position where the partial discharge has occurred.

Embodiment 2.
FIG. 10 is a block diagram showing a functional configuration of a processing device constituting the partial discharge detection system according to the second embodiment. The processing device 40 is a processing device that constitutes the partial discharge detection system 1 according to the second embodiment. The processing device 40 displays a detection result image including an analysis result of the state of the transformer 5 or the display of the instrument installed in the transformer 5. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the configurations different from those in the first embodiment will be mainly described.

The processing device 40 has an analysis unit 41 that analyzes the state of the electric device or the display of the instrument installed in the electric device based on the video data. The communication unit 23 sends video data to the image generation unit 22, the sensor position measurement unit 25, and the analysis unit 41. The image generation unit 22 generates a detection result image including the analysis result by the analysis unit 41. The display unit 27 displays the generated detection result image.

FIG. 11 is a diagram showing an example of a detection result image displayed by the processing apparatus shown in FIG. The detection result image 43 of the second embodiment is obtained by adding an element representing the analysis result by the analysis unit 41 to the detection result image 33 of the first embodiment. Each of the marks 44, 45, 46, 47, and 48 is an element representing the analysis result.

The analysis unit 41 analyzes the state of the transformer 5, such as the presence or absence of oil leakage to the outside of the transformer 5, or the presence or absence of rust on the exterior of the transformer 5. The transformer 5 is provided with an instrument such as a counter that displays the number of times the tap switcher is operated, an oil level gauge that measures the height of the oil level of the transformer 5, or a thermometer that measures the temperature of the oil. The analysis unit 41 analyzes the display of the counter, the display of the oil level gauge, or the display of the thermometer.

The mark 44 is an element indicating that an oil leak has occurred. The position of the mark 44 represents the position where the oil leaks. The mark 45 is an element indicating that rust has occurred. The position of the mark 45 represents the position where rust is generated. The shape and size of the mark 45 are determined according to the range in which rust is generated. The mark 46 is an element representing the numerical value indicated by the counter. The mark 47 is an element representing a numerical value indicated by the oil level gauge. The mark 48 is an element representing a numerical value indicated by a thermometer.

The detection result image 43 shows the marks 44, 45 indicating the analysis result of the state of the transformer 5 and the marks 46, 47, 48 indicating the analysis result of the display of the instrument, so that the operator can perform the state of the transformer 5. And the display of the instrument can be confirmed from the detection result image 43. The processing device 3 can clearly indicate the position where the partial discharge has occurred, and can clearly indicate the information required for the inspection of the transformer 5.

The operator can check the state of the transformer 5 and the display of the instrument without visually checking the state of the transformer 5 and the display of the instrument while walking around the transformer 5. Thereby, the work load of the worker can be reduced.

The target of analysis by the analysis unit 41 is not limited to the one illustrated in the second embodiment. The analysis unit 41 may analyze a state other than the presence or absence of oil leakage or rust. The analysis unit 41 may analyze instruments other than the counter of the tap switch, the oil level gauge, and the thermometer. The analysis unit 41 may analyze at least one of the state of the electric device and the display of the instrument installed in the electric device.

According to the second embodiment, the partial discharge detection system 1 analyzes the state of the electric device or the display of the instrument installed in the electric device, and generates a detection result image 43 including the analysis result. As a result, the partial discharge detection system 1 has an effect that the information required for the inspection of the transformer 5 can be shown in an easy-to-understand manner.

Next, the hardware configurations of the processing devices 3 and 40 constituting the partial discharge detection system 1 according to the first or second embodiment will be described. Each functional unit included in the processing devices 3 and 40 is realized by using a computer system such as a personal computer or a general-purpose computer.

FIG. 12 is a diagram showing an example of a hardware configuration included in the processing device constituting the partial discharge detection system according to the first or second embodiment. FIG. 12 shows the configuration of the computer system 50. The computer system 50 includes a CPU 51 that executes various processes, a memory 52 that is a built-in memory, a communication device 53 that communicates with external devices of the processing devices 3 and 40, and a storage device 54 that stores various information. It has an input device 55 for inputting various information and a display device 56 for displaying various information.

The functions executed by the processing devices 3 and 40 are realized by software, firmware, or a combination of software and firmware. The software or firmware is written as a program and stored in the storage device 54.

The CPU 51 realizes the functions of the processing devices 3 and 40 by reading the software or firmware stored in the storage device 54 into the memory 52 and executing the software or firmware. When the program stored in the storage device 54 is executed by the CPU 51, the operations of the processing devices 3 and 40 are executed. The program stored in the storage device 54 causes the computer to execute the processing realized by the functions of the processing devices 3 and 40. The functions of the image generation unit 22, the discharge position estimation unit 24, the sensor position measurement unit 25, and the analysis unit 41 are realized by using software or firmware in combination with the CPU 51.

The memory 52 is a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory) or EEPROM® (Electrically Erasable). Programmable Read Only Memory). The storage device 54 is an HDD (Hard Disk Drive) or an SSD (Solid State Drive).

The function of the communication unit 23 is realized by using the communication device 53. The function of the storage unit 26 is realized by using the storage device 54. The input device 55 is an input device such as a keyboard, a mouse, or a touch panel. The function of the input unit 21 is realized by using the input device 55. The display device 56 is a monitor or a display. The function of the display unit 27 is realized by using the display device 56.

In the first or second embodiment, the electric device may be any electric device in which an insulating medium is enclosed, and may be an electric device other than the transformer 5. The electrical device may be an electrical device such as a switchgear or a generator.

The configuration shown in the above-described embodiment shows an example of the contents of the present disclosure. The configurations of each embodiment can be combined with other known techniques. The configurations of the respective embodiments may be combined as appropriate. It is possible to omit or change a part of the configuration of each embodiment without departing from the gist of the present disclosure.

1 Partial discharge detection system, 2 Partial discharge detection device, 3,40 processing device, 4 camera, 5 transformer, 6 AE sensor, 7 high frequency CT, 8 ground wire, 11, 12 filter section, 13, 14 amplifier, 15 synchronization Detector, 16 A / D converter, 17,51 CPU, 18 communication device, 21 input unit, 22 image generation unit, 23 communication unit, 24 discharge position estimation unit, 25 sensor position measurement unit, 26 storage unit, 27 display Unit, 31,32 image, 33,43 detection result image, 34 partial image, 35,36,44,45,46,47,48 mark, 41 analysis unit, 50 computer system, 52 memory, 53 communication device, 54 memory Device, 55 input device, 56 display device.

Claims (9)

A partial discharge detection system including a partial discharge detection device that detects a partial discharge generated in an electric device and a processing device that processes the discharge data acquired by detecting the partial discharge.
The processing device is
A discharge position estimation unit that estimates the position where the partial discharge occurs based on the discharge data, and a discharge position estimation unit.
A partial discharge detection system comprising: an image generation unit for generating a detection result image in which an element representing a partial discharge generation position is added to a stereoscopic image of the electric device. The partial discharge detection system according to claim 1, wherein the image generation unit generates the stereoscopic image representing the appearance of the electric device. The partial discharge detection device has a sensor that is detachably arranged in the electric device and detects sound waves propagating from a position where the partial discharge occurs.
The partial discharge detection system according to claim 2, wherein the image generation unit generates the stereoscopic image of the appearance in a state where the sensor is attached. The partial discharge detection system according to claim 2 or 3, wherein the image generation unit generates the stereoscopic image based on the video data acquired by photographing the electric device. The partial discharge detection system according to claim 3, wherein the processing device includes a sensor position measuring unit that measures the position of the sensor based on video data acquired by photographing the electric device. The partial discharge detection system according to any one of claims 2 to 5, wherein the image generation unit generates the stereoscopic image including a portion representing the internal structure of the electric device. The partial discharge detection system according to claim 6, wherein the image generation unit generates a portion of the stereoscopic image representing the internal structure based on the design data of the electric device. The partial discharge detection system according to claim 1, wherein the image generation unit generates the stereoscopic image representing the internal structure of the electric device. The processing device has an analysis unit that analyzes the state of the electric device or the display of the instrument installed in the electric device based on the video data.
The partial discharge detection system according to claim 4 or 5, wherein the image generation unit generates the detection result image including the analysis result by the analysis unit.

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