CN212514850U - Online partial discharge monitoring system - Google Patents
Online partial discharge monitoring system Download PDFInfo
- Publication number
- CN212514850U CN212514850U CN202020457380.2U CN202020457380U CN212514850U CN 212514850 U CN212514850 U CN 212514850U CN 202020457380 U CN202020457380 U CN 202020457380U CN 212514850 U CN212514850 U CN 212514850U
- Authority
- CN
- China
- Prior art keywords
- partial discharge
- module
- digital
- monitoring system
- analog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses an online partial discharge monitoring system, including backstage monitoring system, data acquisition device and ultrasonic wave partial discharge monitoring devices, real-time data digital analog conversion module, a plurality of data acquisition devices are connected respectively to backstage monitoring system, all connect a plurality of ultrasonic wave partial discharge monitoring devices through wireless communication or field bus's mode on every data acquisition device, the utility model discloses can come the method of real-time supervision partial discharge signal through the mode that backstage sound was monitored, help the engineer further confirm whether have partial discharge take place and severity, reduce the wrong report and the possibility of missing reporting.
Description
Technical Field
The utility model relates to a control technical field specifically is an online partial discharge monitoring system.
Background
Because the phenomenon of false alarm appears in the ultrasonic monitoring partial discharge because of disturbing easily, and because the partial discharge appears occasionally at some times at the equipment initial stage monitored, can not appear continuously, lead to the problem that whether high-tension apparatus such as the accurate judgement is surveyed cubical switchboard, transformer or high tension cable of in time has the partial discharge to take place really and to the partial discharge signal that appears occasionally and leak easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an online partial discharge monitoring system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an online partial discharge monitoring system, includes backstage monitoring system, data acquisition device, ultrasonic wave partial discharge monitoring device and real-time digital analog conversion module, backstage monitoring system connects a plurality of data acquisition device respectively, all connects an ultrasonic wave partial discharge monitoring device through wireless communication or field bus's mode on every data acquisition device, real-time digital analog conversion module includes signal monitoring equipment, digital analog conversion, audio power amplifier.
As a further aspect of the present invention: the ultrasonic partial discharge monitoring device comprises an ultrasonic sensor, a preamplification band-pass filtering module, an analog-to-digital conversion module, a noise interference removing module and a digital signal communication transmission module, wherein the ultrasonic sensor, the preamplification band-pass filtering module, the analog-to-digital conversion module, the noise interference removing module and the digital signal communication transmission module are sequentially connected.
As a further aspect of the present invention: the pre-amplification band-pass filtering module is also connected with a frequency mixing and frequency selecting module, the frequency mixing and frequency selecting module is connected with a second path of analog-to-digital conversion module, and the second path of analog-to-digital conversion module is connected with a digital signal communication transmission module through a selection switch.
As a further aspect of the present invention: the amplified ultrasonic signals are input to a frequency mixing and frequency selecting module, and the frequency mixing and frequency selecting module comprises a nonlinear device, a pass filter, an analog-to-digital conversion module and a digital signal communication transmission module which are sequentially connected.
As a further aspect of the present invention: the data acquisition device comprises a digital-to-analog conversion module, an audio power amplifier and a playback device, wherein the input end of the digital-to-analog conversion module is connected with the real-time data of the ultrasonic partial discharge signal of the monitored device, the output end of the digital-to-analog conversion module is connected with the audio power amplifier, and the audio power amplifier is also connected with the playback device.
As a further aspect of the present invention: the playback device comprises a loudspeaker and an earphone.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can come the method of real-time supervision partial discharge signal through the mode that backstage sound was monitored, help the engineer further to confirm whether there is partial discharge to take place and severity, reduce the wrong report and the possibility of failing to report.
Drawings
Fig. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic diagram of a mixer circuit.
Fig. 3 is a schematic block diagram of a mixer circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, examples 1-3: the embodiment of the utility model provides an in, an online partial discharge monitoring system, including backstage monitoring system, data acquisition device and ultrasonic wave partial discharge monitoring device, a plurality of data acquisition device are connected respectively to backstage monitoring system, all connect a plurality of ultrasonic wave partial discharge monitoring device through wireless communication or field bus's mode on every data acquisition device.
In the switch cabinet/transformer/high-voltage cable on-line partial discharge monitoring system adopting an ultrasonic sensor as a partial discharge signal monitoring sensor, the ultrasonic sensor in the partial discharge monitoring device pre-amplifies a monitored partial discharge signal, performs band-pass filtering, analog-to-digital conversion and noise interference removal digital signal processing, then transmits the processed partial discharge signal to a data acquisition device through a wireless network or other field buses at an interval time of more than 5 seconds, the data acquisition device transmits the acquired signal of the partial discharge monitoring device to a background monitoring system, and the background monitoring system performs data processing analysis and judges whether a partial discharge phenomenon exists and whether the partial discharge phenomenon exceeds a set threshold value so as to achieve the purpose of monitoring the partial discharge.
The ultrasonic partial discharge monitoring device comprises an ultrasonic sensor, a preamplification band-pass filtering module, an analog-to-digital conversion module, a noise interference removing module and a digital signal communication transmission module, wherein the ultrasonic sensor, the preamplification band-pass filtering module, the analog-to-digital conversion module, the noise interference removing module and the digital signal communication transmission module are sequentially connected. The pre-amplification band-pass filtering module is also connected with a frequency mixing and frequency selecting module, the frequency mixing and frequency selecting module is connected with a second path of analog-to-digital conversion module, and the second path of analog-to-digital conversion module is connected with a digital signal communication transmission module through a selection switch. The data acquisition device comprises a digital-to-analog conversion module, an audio power amplifier and a playback device, wherein the input end of the digital-to-analog conversion module is connected with the real-time data of the ultrasonic partial discharge signal of the monitored device, the output end of the digital-to-analog conversion module is connected with the audio power amplifier, and the audio power amplifier is also connected with the playback device.
The signal processing channel part of the ultrasonic sensor in the partial discharge monitoring device is added with a link of frequency mixing and frequency selection, and the link is controlled and selected by software and an analog switch circuit.
When the signal is needed, the signal of the ultrasonic sensor is subjected to pre-amplification and band-pass filtering, then is subjected to frequency mixing circuit, the difference frequency of the local oscillation signal of 38.4kHz and the frequency selection, and then is subjected to analog-to-digital conversion, so that two advantages are provided, one is capable of greatly reducing the signal frequency, the requirement of real-time communication on the communication speed is reduced, the stability is improved, the second signal falls in the audible audio frequency range of human ears, the signal is transmitted to a background through wireless and other communication modes after digital-to-analog conversion and then is subjected to digital-to-analog conversion reduction amplification and then is played through earphones or loudspeakers, and whether the partial discharge phenomenon occurs or not can be further judged and confirmed by continuously monitoring the sound reduced by the signal.
The ultrasonic partial discharge monitoring device generally transmits data to a background at a low rate and at least with an interval of more than 5 seconds after passing through a channel I and being processed by an analog-to-digital conversion 1, but when a background monitoring system monitors that a partial discharge signal monitored by a partial discharge monitoring device of a monitored device exceeds a threshold value and gives an alarm or an engineer needs to monitor whether partial discharge does exist in a certain monitored device, the background monitoring system can set the signal transmitted by the partial discharge monitoring device of the device as a channel II, and transmits a digital signal to a data acquisition device in real time after passing through a frequency mixing frequency selection signal and a digital-to-analog conversion 2 and then transmits the digital signal to the monitoring system, wherein the analog-to-digital conversion 1 requires 12 bits, the sampling rate is more than 100ksps, the analog-to-digital conversion 2 requires 12 bits, and the sampling rate is more than 8 ksps.
Example 2: on the basis of the embodiment 1, the background monitoring system computer performs digital-to-analog conversion on the real-time signal, amplifies the real-time signal by power, and then broadcasts the real-time signal by a loudspeaker or an earphone of the background monitoring system to restore the real-time signal to the sound which can be heard by human ears, so that the purpose of continuously monitoring whether the equipment really has the phenomenon of partial discharge exceeding the standard or not in a key manner is achieved, and an engineer can monitor the equipment such as a monitored switch cabinet/transformer/high-voltage cable and the like in the system range without going to the site.
The design has no special requirements on a computer adopted by a background system, and no special arrangement is needed for a digital-to-analog conversion module and an audio power amplifier. However, in order to ensure a certain margin and redundancy, the transmission rate of the communication data between the background monitoring system and the data acquisition device and between the data acquisition device and the ultrasonic partial discharge monitoring device is required to be more than 200kbps in consideration of real-time transmission of 12-bit real-time data with a sampling rate of 8 ksps.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides an online partial discharge monitoring system, includes backstage monitoring system, data acquisition device, ultrasonic wave partial discharge monitoring device and real-time digital analog conversion module, its characterized in that, backstage monitoring system connects a plurality of data acquisition device respectively, all connects an ultrasonic wave partial discharge monitoring device through wireless communication or field bus's mode on every data acquisition device, real-time digital analog conversion module includes signal monitoring equipment, digital analog conversion, audio power amplifier.
2. The on-line partial discharge monitoring system of claim 1, wherein the ultrasonic partial discharge monitoring device comprises an ultrasonic sensor, a pre-amplification band-pass filtering module, a first analog-to-digital conversion module, a noise interference removing module and a digital signal communication transmission module, and the ultrasonic sensor, the pre-amplification band-pass filtering module, the analog-to-digital conversion module, the noise interference removing module and the digital signal communication transmission module are sequentially connected.
3. The on-line partial discharge monitoring system of claim 2, wherein the pre-amplification band-pass filtering module is further connected with a frequency mixing and selecting module, the frequency mixing and selecting module is connected with a second channel of analog-to-digital conversion module, and the second channel of analog-to-digital conversion module is connected with the digital signal communication and transmission module through a selection switch.
4. The system of claim 3, wherein the amplified ultrasonic signal is input to a frequency mixing and selecting module, and the frequency mixing and selecting module comprises a nonlinear device, a pass filter, an analog-to-digital conversion module, and a digital signal communication and transmission module, which are connected in sequence.
5. The on-line partial discharge monitoring system of claim 1, wherein the data acquisition device comprises a digital-to-analog conversion module, an audio power amplifier and a playback device, wherein an input end of the digital-to-analog conversion module is connected to the real-time data of the ultrasonic partial discharge signal of the monitored device, an output end of the digital-to-analog conversion module is connected to the audio power amplifier, and the audio power amplifier is further connected to the playback device.
6. The online partial discharge monitoring system of claim 5, wherein the sound reproducing device comprises a speaker and an earphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457380.2U CN212514850U (en) | 2020-04-01 | 2020-04-01 | Online partial discharge monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457380.2U CN212514850U (en) | 2020-04-01 | 2020-04-01 | Online partial discharge monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212514850U true CN212514850U (en) | 2021-02-09 |
Family
ID=74440825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020457380.2U Active CN212514850U (en) | 2020-04-01 | 2020-04-01 | Online partial discharge monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212514850U (en) |
-
2020
- 2020-04-01 CN CN202020457380.2U patent/CN212514850U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111398751A (en) | On-line partial discharge monitoring system and implementation method | |
| DE10135463A1 (en) | Device for the transmission, reception and processing of audio signals and control signals in loudspeaker systems | |
| CN212514850U (en) | Online partial discharge monitoring system | |
| CN109347586B (en) | Emergency broadcasting system with terminal broadcasting voice monitoring function during text broadcasting | |
| CN205681430U (en) | A kind of transmitter that monitors broadcasts the system that state is reported to the police with differential mode | |
| CN112637438B (en) | Entrance guard double-end intercom method and system based on single-line transmission | |
| CN109525341B (en) | Emergency broadcasting system with terminal monitoring function during text broadcasting | |
| DE202006018730U1 (en) | Emergency device for electro acoustic emergency warning system, has microphone mounted in loudspeakers to measure acoustic pressure of individual loudspeakers, where loud speaker operating analog signal is compared with radiated signal | |
| CN109347585B (en) | Emergency broadcasting system for realizing text broadcasting self-checking function | |
| CN206164800U (en) | Novel monitoring headpone | |
| CN102904657B (en) | Frequency modulation broadcast listening monitoring receiver | |
| CN207200876U (en) | Multinuclear video capture device | |
| JP2006023086A (en) | Corona noise monitoring device, corona noise monitoring system, and corona noise monitoring method | |
| CN201409201Y (en) | Common cable transmission system used for monitoring | |
| CN109586825B (en) | Emergency broadcasting system for realizing audio broadcasting self-checking function | |
| CN109586824B (en) | Emergency broadcasting system with audio broadcasting self-checking function | |
| CN204408355U (en) | A kind of broadcast and monitoring system | |
| CN214752226U (en) | Intelligent alarm unit of lightning protection junction box | |
| CN2411522Y (en) | Audio-video fire-fighting alarm device | |
| CN113573188A (en) | Screen noise earphone | |
| CN213521903U (en) | Intelligent broadcasting system for emulsion explosive factory | |
| CN212163692U (en) | Debugging-free digital sound device | |
| CN109462450B (en) | Emergency broadcasting system with text broadcasting self-checking function | |
| CN207219029U (en) | The tele-control system of active linear array sound equipment and active linear array sound equipment | |
| CN207369050U (en) | A kind of background music emergency broadcast system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |