CN210294448U - High tension switchgear partial discharge detecting system - Google Patents
High tension switchgear partial discharge detecting system Download PDFInfo
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- CN210294448U CN210294448U CN201920549562.XU CN201920549562U CN210294448U CN 210294448 U CN210294448 U CN 210294448U CN 201920549562 U CN201920549562 U CN 201920549562U CN 210294448 U CN210294448 U CN 210294448U
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Abstract
A high tension switchgear partial discharge detection system, includes: the monitoring system comprises an ultrasonic sensor device and a monitoring center, wherein the ultrasonic sensor device is used for monitoring high-voltage partial discharge; the ultrasonic sensor device includes: the device comprises an ultrasonic sensor, an electric signal processing circuit, a digital processing circuit and a wireless communication module; the ultrasonic sensor is used for converting a sound signal generated by high-voltage partial discharge into an electric signal; the electric signal processing circuit is used for processing the electric signals; the digital processing circuit is used for converting the electric signal into two paths of digital signals with different strengths, automatically selecting the corresponding digital signals according to the strength of the environmental noise for processing, and transmitting the processed digital signals to the monitoring center through wireless communication. Because the corresponding signal is automatically selected for processing according to the intensity of the environmental noise, the dynamic range of the signal is increased, the ultrasonic sensor device has strong environmental adaptability, and simultaneously, the SD card storage module can also provide data backup and recovery functions.
Description
Technical Field
The utility model relates to a high pressure partial discharge detection technical field, concretely relates to high tension switchgear partial discharge detecting system.
Background
In recent years, with the development of national smart grid construction, the requirements on the safety and reliability of the operation of power system equipment are increasingly increased. The switch cabinet is one of the most important electrical equipment of the smart grid, and mainly has the functions of opening and closing, controlling and protecting the electrical equipment in the process of generating, transmitting, distributing and converting electric energy of an electric power system. The switch cabinet safe operation is significant to the power grid stability. Researches show that the switch cabinet accidents caused by the partial discharge defects account for a considerable rate and tend to be high, so that the switch cabinet partial discharge monitoring is carried out in the intelligent power grid and the large-scale user transformer substation, the normal operation of the switch cabinet is ensured, and the method is extremely important in the promotion of the construction of the whole intelligent power grid.
Disclosure of Invention
Aiming at the problem that the high-voltage switch cabinet is easily interfered by environmental noise in the process of detecting the partial discharge, the application provides a high-voltage switch cabinet partial discharge detection system, which comprises an ultrasonic sensor device and a monitoring center, wherein the ultrasonic sensor device is used for monitoring the high-voltage partial discharge;
the ultrasonic sensor device includes: the device comprises an ultrasonic sensor, an electric signal processing circuit, a digital processing circuit and a wireless communication module;
the output end of the ultrasonic sensor is coupled to the input end of the signal processing circuit, the output end of the signal processing circuit is coupled to the input end of the digital processing circuit, and the output end of the digital processing circuit is coupled to the input end of the wireless communication module;
the ultrasonic sensor is used for converting a sound signal generated by high-voltage partial discharge into an electric signal;
the electric signal processing circuit is used for processing the electric signals;
the digital processing circuit is used for converting the electric signal into two paths of digital signals with different strengths, automatically selecting the corresponding digital signals according to the strength of the environmental noise for processing, and transmitting the processed digital signals to the monitoring center through wireless communication.
In one embodiment, the electrical signal processing circuit includes a low noise amplifier and a passive band pass filter;
the input end of the low-noise amplifier is coupled to the output end of the ultrasonic sensor, and the output end of the low-noise amplifier is coupled to the input end of the passive band-pass filter;
the low-noise amplifier is used for amplifying the electric signal by 60 dB;
the passive band-pass filter is used for filtering the amplified electric signals.
In one embodiment, a digital processing circuit includes a first A/D sampling module, an amplifier, a second A/D sampling module, and a controller;
the input end of the first A/D sampling module and the input end of the amplifier are respectively coupled to the output end of the passive band-pass filter in parallel, the input end of the second A/D sampling module is coupled to the output end of the amplifier, the output ends of the first A/D sampling module and the second A/D sampling module are respectively coupled to the input end of the controller in parallel, and the output end of the controller is coupled to the input end of the wireless communication module.
In one embodiment, the digital processing circuit further comprises an SD card storage module and a real-time clock module;
the SD card storage module and the real-time clock module are respectively connected with the controller.
In one embodiment, the ultrasonic sensor device further comprises a housing, and the ultrasonic sensor, the signal processing circuit, the data processing circuit and the wireless communication module are respectively disposed inside the housing.
In one embodiment, the base of the shell is provided with a magnetic body, and the shell is adsorbed to the high-voltage switch cabinet through the magnetic body.
In one embodiment, the wireless communication module is externally connected with a rod antenna.
In one embodiment, the ultrasonic sensor device is provided with a unique code;
and the monitoring center identifies the position of the ultrasonic sensor device when high-voltage partial discharge occurs according to the unique code.
According to the local discharge detection system of the high-voltage switch cabinet, the ultrasonic sensor device can automatically select one corresponding path of signal to be processed according to the intensity of the environmental noise, so that the dynamic range of the signal is increased, the ultrasonic sensor device has strong environmental adaptability, meanwhile, the SD card storage module can provide data backup and recovery functions, and further, the monitoring center can conveniently determine the position of the ultrasonic sensor device which generates high-voltage discharge through unique coding.
Drawings
FIG. 1 is a schematic diagram of a partial discharge detection system for a high voltage switch cabinet;
FIG. 2 is a schematic diagram of an ultrasonic sensor device networking;
FIG. 3 is a schematic structural diagram of a housing of the ultrasonic sensor device;
fig. 4 is a schematic view of the bottom structure of the housing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
High voltage discharges will produce sound waves with frequencies distributed over a wide range of audible to ultrasonic frequencies. The ultrasonic sensor can receive sound waves generated by high-voltage discharge, and the receiving frequency should be selected to be a higher ultrasonic frequency band so as to avoid audible sound interference of the environment. The working frequency of the common ultrasonic sensor is 40kHz, 75kHz and the like. How to realize the non-contact ultrasonic sensor which can cover the monitoring area and has the capability of resisting the environmental noise, the present example provides a high-voltage switch cabinet partial discharge detection system, the schematic diagram of which is shown as dispute 1, and the system comprises an ultrasonic sensor device 1 for monitoring the high-voltage partial discharge and a monitoring center 2.
Specifically, the ultrasonic sensor device 1 includes an ultrasonic sensor 11, an electric signal processing circuit 12, a data processing circuit 13, and a wireless communication module 14; the operating frequency of the ultrasonic sensor 11 is preferably 40kHz, and the wireless communication module 14 may be a bluetooth communication module or a WIFI communication module. The output end of the ultrasonic sensor 11 is coupled to the input end of the electric signal processing circuit 12, the output end of the electric signal processing circuit 12 is coupled to the input end of the digital processing circuit 13, and the output end of the digital processing circuit 13 is coupled to the input end of the wireless communication module 14; the ultrasonic sensor 11 is used for converting a sound signal generated by high-voltage partial discharge into an electric signal; the electric signal processing circuit 12 is used for processing the electric signal; the digital processing circuit 13 is configured to convert the electrical signal into two paths of digital signals with different strengths, automatically select a corresponding digital signal according to the strength of the environmental noise, and transmit the processed digital signal to the monitoring center 2 through wireless communication.
The electrical signal processing circuit 12 includes a low noise amplifier 121 and a passive band pass filter 122, an input end of the low noise amplifier 121 is coupled to an output end of the ultrasonic sensor 11, an output end of the low noise amplifier is coupled to an input end of the passive band pass filter 122, the low noise amplifier 121 is configured to amplify an electrical signal by 60dB, the passive band pass filter 122 is configured to filter the amplified electrical signal, for example, a collected frequency component in a frequency range of 40kHz is retained, and frequency components in other ranges are attenuated to an extremely low level.
Further, the digital processing circuit 13 includes a first a/D sampling module 131, an amplifier 132, a second a/D sampling module 133, and a controller 134, wherein an input terminal of the first a/D sampling module 131 and an input terminal of the amplifier 132 are respectively coupled in parallel to an output terminal of the passive band-pass filter 122, an input terminal of the second a/D sampling module 133 is coupled to an output terminal of the amplifier 132, output terminals of the first a/D sampling module 131 and the second a/D sampling module 133 are respectively coupled in parallel to an input terminal of the controller 134, and an output terminal of the controller 134 is coupled to an input terminal of the wireless communication module 14. The controller 134 may automatically select a corresponding path of digital signals according to the intensity of the environmental noise, where one path is the digital signal obtained after sampling by the first a/D sampling module 131, and the digital signal is amplified by 60dB, and the other path is the digital signal obtained after amplifying by the amplifier 132 and then sampling by the second a/D sampling module 133, and the digital signal of the path may be amplified by 80dB by the amplifier 132, for example, when the environmental noise is strong, the controller 134 may select the signal of 80dB, and conversely, may select the signal of 60 dB.
Further, the digital processing circuit 13 further includes an SD card storage module 135 and a real-time clock module 136; the SD card storage module 135 and the real-time clock module 136 are respectively connected to the controller 134, the controller 134 can store the acquired digital signal and the real-time clock information of the digital signal acquisition time in the SD card storage module 135, when the ultrasonic sensor device 1 is in a networking state, the controller 134 initiates a data transmission operation, and transmits the acoustic data to the monitoring center 2 through a communication device in the network, the networking state diagram is shown in fig. 2, further, the ultrasonic sensor device 1 is provided with a unique code, and the monitoring center 2 identifies the position of the ultrasonic sensor device 1 when high-voltage partial discharge occurs according to the unique code.
In addition, the communication networking can enable the monitoring center 2 to realize remote data reporting, can realize the setting of parameters such as online self-checking, threshold values, real-time clocks and the like of the ultrasonic sensor device 1, and enable the monitoring center 2 to judge the severity of the partial discharge based on the amplitude, the occurrence frequency, the type and the development trend of the partial discharge signal, and realize the functions of remote control, diagnosis, inquiry, access and the like.
Further, the ultrasonic sensor device 1 further includes a housing 15, as shown in fig. 3, the ultrasonic sensor 11, the signal processing circuit 12, the digital processing circuit 13 and the wireless communication module 14 are respectively disposed inside the housing, and the wireless communication module 14 is externally connected to a rod antenna 16.
Further, the base of the housing 15 is provided with a magnetic body 151, and the housing 15 is adsorbed on the high-voltage switch cabinet through the magnetic body 151, which greatly facilitates the installation of the ultrasonic sensor device 1 on the high-voltage switch cabinet.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (8)
1. A high tension switchgear partial discharge detecting system which characterized in that includes: the monitoring system comprises an ultrasonic sensor device and a monitoring center, wherein the ultrasonic sensor device is used for monitoring high-voltage partial discharge;
the ultrasonic sensor device includes: the device comprises an ultrasonic sensor, an electric signal processing circuit, a digital processing circuit and a wireless communication module;
the output end of the ultrasonic sensor is coupled to the input end of the electric signal processing circuit, the output end of the electric signal processing circuit is coupled to the input end of the digital processing circuit, and the output end of the digital processing circuit is coupled to the input end of the wireless communication module;
the ultrasonic sensor is used for converting a sound signal generated by high-voltage partial discharge into an electric signal;
the electric signal processing circuit is used for processing the electric signal;
the digital processing circuit is used for converting the electric signal into two paths of digital signals with different strengths, automatically selecting the corresponding digital signals according to the strength of the environmental noise for processing, and transmitting the processed digital signals to the monitoring center through wireless communication.
2. The high voltage switchgear partial discharge detection system of claim 1, wherein the electrical signal processing circuit comprises a low noise amplifier and a passive band pass filter;
the input end of the low-noise amplifier is coupled to the output end of the ultrasonic sensor, and the output end of the low-noise amplifier is coupled to the input end of the passive band-pass filter;
the low noise amplifier is used for amplifying the electric signal by 60 dB;
the passive band-pass filter is used for filtering the amplified electric signals.
3. The high voltage switch cabinet partial discharge detection system of claim 2, wherein the digital processing circuit comprises a first a/D sampling module, an amplifier, a second a/D sampling module, and a controller;
the input of first AD sampling module and the input of amplifier are parallel coupling respectively passive band pass filter's output, the input of second AD sampling module is coupled to the output of amplifier, the output of first AD sampling module and second AD sampling module respectively parallel coupling to the input of controller, the output of controller couple to wireless communication module's input.
4. The high voltage switch cabinet partial discharge detection system of claim 3, wherein the digital processing circuit further comprises an SD card storage module and a real time clock module;
the SD card storage module and the real-time clock module are respectively connected to the controller.
5. The partial discharge detection system of a high voltage switch cabinet according to claim 1, wherein the ultrasonic sensor device further comprises a housing, and the ultrasonic sensor, the signal processing circuit, the digital processing circuit and the wireless communication module are respectively disposed inside the housing.
6. The partial discharge detection system for the high voltage switch cabinet according to claim 5, wherein the base of the housing is provided with a magnetic body, and the housing is attached to the high voltage switch cabinet through the magnetic body.
7. The partial discharge detection system of claim 1, wherein the wireless communication module is externally connected to a rod antenna.
8. The high voltage switchgear partial discharge detection system of claim 1, wherein the ultrasonic sensor device is provided with a unique code;
and the monitoring center identifies the position of the ultrasonic sensor device when high-voltage partial discharge occurs according to the unique code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920549562.XU CN210294448U (en) | 2019-04-22 | 2019-04-22 | High tension switchgear partial discharge detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920549562.XU CN210294448U (en) | 2019-04-22 | 2019-04-22 | High tension switchgear partial discharge detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462216A (en) * | 2020-11-30 | 2021-03-09 | 国网山西省电力公司朔州供电公司 | Multi-frequency-band combined type discharge detection system |
| CN112748313A (en) * | 2020-12-23 | 2021-05-04 | 深圳供电局有限公司 | Handheld partial discharge tester and partial discharge testing system |
| CN115360826A (en) * | 2022-10-22 | 2022-11-18 | 北京金冠智能电气科技有限公司 | Intelligent power distribution terminal equipment |
-
2019
- 2019-04-22 CN CN201920549562.XU patent/CN210294448U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462216A (en) * | 2020-11-30 | 2021-03-09 | 国网山西省电力公司朔州供电公司 | Multi-frequency-band combined type discharge detection system |
| CN112748313A (en) * | 2020-12-23 | 2021-05-04 | 深圳供电局有限公司 | Handheld partial discharge tester and partial discharge testing system |
| CN115360826A (en) * | 2022-10-22 | 2022-11-18 | 北京金冠智能电气科技有限公司 | Intelligent power distribution terminal equipment |
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