CN215813147U - Transformer partial discharge detection device - Google Patents
Transformer partial discharge detection device Download PDFInfo
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- CN215813147U CN215813147U CN202121458429.7U CN202121458429U CN215813147U CN 215813147 U CN215813147 U CN 215813147U CN 202121458429 U CN202121458429 U CN 202121458429U CN 215813147 U CN215813147 U CN 215813147U
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Abstract
The transformer partial discharge detection device comprises a microphone array, an adjustable support, an inspection vehicle body and a control device, wherein the microphone array is arranged on the adjustable support, the lower end of the adjustable support is connected with the upper end of the inspection vehicle body, the control device is electrically connected with the microphone array and the adjustable support, the microphone array collects ultrasonic signals generated by partial discharge of a transformer and outputs the ultrasonic signals to the control device, the control device controls the direction of the adjustable support according to the strength of the ultrasonic signals, and the control device is also in wireless communication connection with external remote monitoring equipment so as to facilitate remote monitoring. The inspection vehicle body is used as a carrier, and the microphone array is adopted to detect the ultrasonic signals generated by partial discharge of the transformer, so that the detection efficiency can be greatly improved, the time and the labor are saved, and the condition of missed inspection can be avoided.
Description
Technical Field
The utility model relates to the technical field of electric power overhaul, in particular to a partial discharge detection device for a transformer.
Background
The partial discharge measurement method is proposed based on various physicochemical phenomena accompanying the partial discharge. The partial discharge of the transformer is accompanied by electric pulse, ultrasonic wave, electromagnetic radiation and chemical reaction phenomena, and the partial discharge signal can be effectively detected by detecting the accompanying phenomena. Currently, partial discharge detection methods are classified into an electrical measurement method and a non-electrical measurement method in a wide range, and both methods are widely applied to partial discharge detection of various types of electrical equipment. The electric measurement method comprises a pulse current method, a radio interference voltage method, an ultrahigh frequency detection method and the like. The non-electrical measurement methods are classified into ultrasonic measurement methods, optical measurement methods, infrared measurement methods, chemical measurement methods, and the like. In the ultrasonic detection in the prior art, each part of the transformer is detected by a handheld ultrasonic detection probe, and time and labor are consumed. And some areas may not be detected due to human omission.
Disclosure of Invention
In view of the above, there is a need for a non-contact transformer partial discharge detection apparatus based on an acoustic array.
The utility model provides a transformer partial discharge detection device includes microphone array, adjustable support, patrols and examines automobile body, controlling means, microphone array sets up on adjustable support, and adjustable support's lower extreme and the upper end of patrolling and examining the automobile body are connected, controlling means and microphone array, adjustable support electric connection, and microphone array gathers the transformer and exports to controlling means because of the ultrasonic signal that partial discharge produced, and controlling means is according to the directional of ultrasonic signal intensity control adjustable support, and controlling means still is connected with external remote monitoring equipment wireless communication to remote monitoring is convenient for.
Preferably, the adjustable support comprises a support plate, an elevation angle adjusting motor, a support rod, a support sleeve, a height adjusting motor, a first gear, a second gear and a horizontal angle adjusting motor, the microphone array is arranged on the front surface of the support plate, an arc-shaped rack is arranged on the back surface of the support plate and is meshed with a rotating shaft of the elevation angle adjusting motor, a rotating center of the arc-shaped rack is rotatably connected with the upper end of the support rod, a machine body of the elevation angle adjusting motor is fixedly connected with the upper end of the support rod, the lower end of the support rod is sleeved with the support sleeve and is connected with the support sleeve, a linear rack is arranged on the side wall of the support rod, the rotating shaft of the height adjusting motor is meshed with the linear rack, a machine body of the height adjusting motor is fixedly connected with the side wall of the support sleeve, the bottom of the support sleeve is fixedly connected with the first gear, the first gear is meshed with the second gear, and the rotating shaft of the horizontal adjusting motor are fixedly connected, the machine body of the horizontal adjusting motor is fixedly connected with the inspection vehicle body.
Preferably, controlling means includes AD sampling module, signal processing module, communication module, AD sampling module's input and microphone array electric connection to convert the ultrasonic wave analog signal that microphone array gathered into digital signal, AD sampling module's output and signal processing module's input electric connection, signal processing module's output and communication module electric connection, in order to transmit ultrasonic wave's digital signal to external remote monitoring equipment through communication module, signal processing module still with elevation angle accommodate motor, height control motor, horizontal angle accommodate motor electric connection, in order to control the operation of elevation angle accommodate motor, height control motor, horizontal angle accommodate motor.
Preferably, the control device further comprises three angle displacement sensors, the angle displacement sensors are electrically connected with the AD sampling module, the three angle displacement sensors respectively collect rotation angles of the elevation angle adjusting motor, the height adjusting motor and the horizontal angle adjusting motor and transmit the rotation angles to the AD sampling module, and the signal processing module controls the operation of the elevation angle adjusting motor, the height adjusting motor and the horizontal angle adjusting motor according to the rotation angle of the motor.
Preferably, the transformer partial discharge detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the signal processing module to alarm for an abnormality.
Has the advantages that: the transformer partial discharge detection device comprises a microphone array, an adjustable support, an inspection vehicle body and a control device, wherein the microphone array is arranged on the adjustable support, the lower end of the adjustable support is connected with the upper end of the inspection vehicle body, the control device is electrically connected with the microphone array and the adjustable support, the microphone array collects ultrasonic signals generated by partial discharge of a transformer and outputs the ultrasonic signals to the control device, the control device controls the direction of the adjustable support according to the strength of the ultrasonic signals, and the control device is also in wireless communication connection with external remote monitoring equipment so as to facilitate remote monitoring. The inspection vehicle body is used as a carrier, and the microphone array is adopted to detect the ultrasonic signals generated by partial discharge of the transformer, so that the detection efficiency can be greatly improved, the time and the labor are saved, and the condition of missed inspection can be avoided.
Drawings
Fig. 1 is a schematic structural diagram of a preferred angle of the partial discharge detection apparatus of the transformer of the present invention.
Fig. 2 is a schematic structural diagram of another preferred angle of the partial discharge detection apparatus of the transformer according to the present invention.
Fig. 3 is a partial structural schematic diagram of fig. 2.
In the figure: the device comprises a transformer partial discharge detection device 10, a microphone array 20, an adjustable support 30, a support plate 301, an arc-shaped toothed rail 3011, an elevation angle adjusting motor 302, a support rod 303, a linear toothed rail 3031, a support sleeve 304, a height adjusting motor 305, a first gear 306, a second gear 307, a horizontal angle adjusting motor 308, an inspection vehicle body 40, a control device 50 and an audible and visual alarm 501.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1 to 3, a transformer partial discharge detection device 10 includes a microphone array 20, an adjustable bracket 30, an inspection vehicle body 40, and a control device 50, wherein the microphone array 20 is disposed on the adjustable bracket 30, a lower end of the adjustable bracket 30 is connected to an upper end of the inspection vehicle body 40, the control device 50 is electrically connected to the microphone array 20 and the adjustable bracket 30, the microphone array 20 collects an ultrasonic signal generated by partial discharge of the transformer and outputs the ultrasonic signal to the control device 50, the control device 50 controls the orientation of the adjustable bracket 30 according to the intensity of the ultrasonic signal, and the control device 50 is further in wireless communication connection with an external remote monitoring device so as to facilitate remote monitoring.
The number of microphones in the microphone array 20 may be any number of 8, 16, 64, etc. The more the number of the microphones is, the more complex the signal processing is, and meanwhile, the higher the sensitivity of ultrasonic detection is, the more accurate the ultrasonic signal direction positioning is.
Further, the adjustable support 30 includes a support plate 301, an elevation angle adjusting motor 302, a support rod 303, a support sleeve 304, a height adjusting motor 305, a first gear 306, a second gear 307, and a horizontal angle adjusting motor 308, the microphone array 20 is disposed on the front surface of the support plate 301, an arc-shaped rack 3011 is disposed on the back surface of the support plate 301, the arc-shaped rack 3011 is engaged with the rotating shaft of the elevation angle adjusting motor 302, the rotating center of the arc-shaped rack 3011 is further rotatably connected with the upper end of the support rod 303, the body of the elevation angle adjusting motor 302 is fixedly connected with the upper end of the support rod 303, the lower end of the support rod 303 is sleeved with the support sleeve 304, a linear rack 3031 is disposed on the side wall of the support rod 303, the rotating shaft of the height adjusting motor 305 is engaged with the linear rack 3031, the body of the height adjusting motor 305 is fixedly connected with the side wall of the support sleeve 304, the bottom of the support sleeve 304 is fixedly connected with the first gear 306, the first gear 306 is engaged with the second gear 307, the second gear 307 is fixedly connected with a rotating shaft of the horizontal adjusting motor, and a machine body of the horizontal adjusting motor is fixedly connected with the inspection vehicle body 40.
Further, the control device 50 includes an AD sampling module, a signal processing module, and a communication module, the input end of the AD sampling module is electrically connected to the microphone array 20 to convert the analog signal of the ultrasonic wave collected by the microphone array 20 into a digital signal, the output end of the AD sampling module is electrically connected to the input end of the signal processing module, the output end of the signal processing module is electrically connected to the communication module to transmit the digital signal of the ultrasonic wave to the external remote monitoring device through the communication module, and the signal processing module is also electrically connected to the elevation angle adjusting motor 302, the height adjusting motor 305, and the horizontal angle adjusting motor 308 to control the operation of the elevation angle adjusting motor 302, the height adjusting motor 305, and the horizontal angle adjusting motor 308.
The AD sampling module is preferably a high-precision AD sampling module, and the input signal of the high-precision AD sampling module is the output electric signal of the microphone, and the electric signal is an analog signal. The high-precision AD sampling module converts the analog signal into a digital signal suitable for subsequent signal processing. The sampling frequency and sampling bit width of the high-precision AD sampling module should be high enough to characterize the sound signal with high precision. The number of AD sampling channels of the high-precision AD sampling module matches the number of microphones of the microphone array 20.
In specific implementation, the high-precision AD sampling module may be one or more AD sampling chips, and one AD sampling chip includes one or more AD sampling channels. In order to be able to characterize the ultrasonic signal with high precision, the sampling frequency of each AD sampling channel should be no less than 160KHz, and the typical sampling frequency is 256 KHz. The sample bit width for each AD sampling channel is typically 16 Bits.
And the signal processing module is used for processing the multi-channel digital signals output by the high-precision AD sampling module. Specifically, after the multi-channel digital signals are converted into specific numerical values, the signal processing module compares the plurality of numerical values, selects the microphones corresponding to the strongest numerical values of the received signals, and adjusts the angle of the supporting plate 301 by controlling the motor according to the positions of the microphones, so that the center microphone is aligned to the ultrasonic source, and related personnel can find the position of partial discharge accurately.
In a preferred embodiment, the signal processing module can be a high-speed DSP processor, a multi-core ARM processor, or a single or multiple FPGAs.
In specific implementation, the communication mode of the communication unit can be optical fiber communication, RJ45 network communication, RS485 serial port communication and 2G/3G/4G/5G wireless communication mode.
Further, the control device 50 further includes three angular displacement sensors, the angular displacement sensors are electrically connected to the AD sampling module, the three angular displacement sensors respectively collect rotation angles of the elevation angle adjusting motor 302, the height adjusting motor 305, and the horizontal angle adjusting motor 308 and transmit the rotation angles to the AD sampling module, and the signal processing module controls the operation of the elevation angle adjusting motor 302, the height adjusting motor 305, and the horizontal angle adjusting motor 308 according to the rotation angle of the motors.
Further, the transformer partial discharge detection device 10 further includes an audible and visual alarm 501, and the audible and visual alarm 501 is electrically connected to the signal processing module to alarm for an abnormality.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (5)
1. A transformer partial discharge detection device is characterized in that: including microphone array, adjustable support, patrol and examine automobile body, controlling means, the microphone array sets up on adjustable support, and adjustable support's lower extreme and the upper end of patrolling and examining the automobile body are connected, controlling means and microphone array, adjustable support electric connection, and the microphone array gathers the transformer and exports to controlling means because of the ultrasonic signal that partial discharge produced, and controlling means is according to the direction of ultrasonic signal intensity control adjustable support, and controlling means still is connected with external remote monitoring equipment wireless communication to remote monitoring is convenient for.
2. The transformer partial discharge detection apparatus of claim 1, wherein: the adjustable support comprises a support plate, an elevation angle adjusting motor, a support rod, a support sleeve, a height adjusting motor, a first gear, a second gear and a horizontal angle adjusting motor, wherein the microphone array is arranged on the front surface of the support plate, an arc-shaped rack is arranged on the back surface of the support plate and meshed with a rotating shaft of the elevation angle adjusting motor, a rotating center of the arc-shaped rack is further rotatably connected with the upper end of the support rod, a machine body of the elevation angle adjusting motor is fixedly connected with the upper end of the support rod, the lower end of the support rod is sleeved and connected with the support sleeve, a linear rack is arranged on the side wall of the support rod, a rotating shaft of the height adjusting motor is meshed and connected with the linear rack, a machine body of the height adjusting motor is fixedly connected with the side wall of the support sleeve, the bottom of the support sleeve is fixedly connected with the first gear, the first gear is meshed and connected with the second gear, and the rotating shaft of the horizontal adjusting motor is fixedly connected with the first gear, the machine body of the horizontal adjusting motor is fixedly connected with the inspection vehicle body.
3. The transformer partial discharge detection apparatus of claim 2, wherein: the control device comprises an AD sampling module, a signal processing module and a communication module, wherein the input end of the AD sampling module is electrically connected with the microphone array to convert ultrasonic analog signals acquired by the microphone array into digital signals, the output end of the AD sampling module is electrically connected with the input end of the signal processing module, the output end of the signal processing module is electrically connected with the communication module to transmit the ultrasonic digital signals to external remote monitoring equipment through the communication module, and the signal processing module is also electrically connected with an elevation angle adjusting motor, a height adjusting motor and a horizontal angle adjusting motor to control the operation of the elevation angle adjusting motor, the height adjusting motor and the horizontal angle adjusting motor.
4. The transformer partial discharge detection apparatus of claim 3, wherein: the control device further comprises three angle displacement sensors, the angle displacement sensors are electrically connected with the AD sampling module, the three angle displacement sensors respectively collect rotation angles of the elevation angle adjusting motor, the height adjusting motor and the horizontal angle adjusting motor and transmit the rotation angles to the AD sampling module, and the signal processing module controls the operation of the elevation angle adjusting motor, the height adjusting motor and the horizontal angle adjusting motor according to the rotation angles of the motors.
5. The transformer partial discharge detection apparatus of claim 4, wherein: the transformer partial discharge detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the signal processing module to alarm for abnormity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121458429.7U CN215813147U (en) | 2021-06-29 | 2021-06-29 | Transformer partial discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121458429.7U CN215813147U (en) | 2021-06-29 | 2021-06-29 | Transformer partial discharge detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215813147U true CN215813147U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121458429.7U Active CN215813147U (en) | 2021-06-29 | 2021-06-29 | Transformer partial discharge detection device |
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| Country | Link |
|---|---|
| CN (1) | CN215813147U (en) |
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2021
- 2021-06-29 CN CN202121458429.7U patent/CN215813147U/en active Active
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