CN203705594U - 10V switch cabinet internal discharge detector based on electromagnetic wave antenna reception array - Google Patents
10V switch cabinet internal discharge detector based on electromagnetic wave antenna reception array Download PDFInfo
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- CN203705594U CN203705594U CN201320881628.8U CN201320881628U CN203705594U CN 203705594 U CN203705594 U CN 203705594U CN 201320881628 U CN201320881628 U CN 201320881628U CN 203705594 U CN203705594 U CN 203705594U
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- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 12
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- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000007726 management method Methods 0.000 abstract description 3
- 238000013500 data storage Methods 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 29
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- 238000005259 measurement Methods 0.000 description 7
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Abstract
The utility model discloses a detector, and especially relates to a 10V switch cabinet internal discharge detector based on an electromagnetic wave antenna reception array; the detector comprises an antenna array receiver connected with a variable gain amplifier; the variable gain amplifier is connected with a band pass filter through a current signal-convert-to voltage signal circuit; the band pass filter is connected with an A/D converter; the A/D converter is connected with a D/A converter through a data communication module; the D/A converter is connected with a microprocessor; the microprocessor is connected with a fault information display and a data storage module. The detector is simple in structure, can carry out 24-hour online monitor of microwave signals emitted by local discharge around the 10V switch cabinet, thereby realizing online monitoring of 10 V switch cabinet internal discharge faults; the detector is strong in practicality, ensures massive storage of the detected data through storage module, and ensures real time massive communication management between the detector and a backstage service system through a communication module.
Description
Technical field
The utility model discloses a kind of pick-up unit, and particularly a kind of 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array particularly comprises device and measuring method that localization of fault and fault type judge.
Background technology
10V switch cubicle range of application is huge, and running environment is different, due to long-term switch on-off process, understands the residing stage of its ageing process significant to safe operation of power system.All discharge and whether exist based on Real-Time Monitoring for the detection of partial discharge of switchgear at present.The index that neither one can quantize to monitor can reflect the ageing process of switch cubicle accurately.Electrical device distributes and concentrates in 10V switch cubicle, and the problem causing due to shelf depreciation is different, need to detect concrete fault type, and then understand failure cause.In the time of the detection failure of switch cabinet of converting station shelf depreciation, be the amplitude by discharge signal substantially, frequencies etc. obtain discharge fault type by rational supposition.This method is practical, but accuracy is bad to novel fault.Need one more accurately, from the fault detection method of mechanism.
Partial discharges fault position definite splits that to close the partial discharges fault analysis of causes of cabinet significant in 10V switch cubicle, and in existing research, is the large weakness of one in existing research for the research of partial discharge position, there is not yet so far reasonable report.10V partial discharge of switchgear data are conventionally only for the detection to when time fault, and partial discharge of switchgear is a long-term process to finally causing switch cubicle fault even to be exploded.Also should be comprehensive, a holocyclic evolution to the detection of shelf depreciation.Will be clear that and understand the process that the shelf depreciation of switch cubicle causes fault even to be exploded, be necessary to collect the signal of good various shelf depreciations, the information such as location, set up the database that is used for the scientific forecasting switch cubicle life-span.
Utility model content
According to above deficiency of the prior art, problem to be solved in the utility model is: provide a kind of and can detect online, the practical 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array.
The utility model solves the technical scheme that its technical matters adopts:
The described 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array, comprise aerial array receiver, aerial array receiver connects variable gain amplifier, variable gain amplifier is by current signal converting voltage signal circuit connecting band bandpass filter, bandpass filter connects A/D converter, A/D converter connects D/A converter by data communication module, and D/A converter connects microprocessor, and microprocessor connects failure message display screen and data memory module.
Aerial array receiver is arranged on to the cabinet outside of switch cubicle, for receiving the microwave signal of being launched by shelf depreciation, the microwave signal of reception is transferred to variable gain amplifier, through variable gain amplifier, gain sends bandpass filter by current signal converting voltage signal circuit to by converting voltage signal to through the microwave signal of gain amplification after amplifying to microwave signal, by A/D converter, signal is converted to digital signal from the voltage signal of bandpass filter process, digital signal sends D/A converter to by data communication module, by D/A converter, digital signal is reduced, signal after reduction is transferred to signal processing system, by the inside switch cabinet electric discharge intelligent diagnostics in microprocessor and the processing of fault locating analysis system, result is presented to failure message display screen, and signal message is stored in data memory module, and set up inside switch cabinet discharge signal data memory module by the division of signal of different electric discharge types.Electric discharge intelligent diagnostics and fault locating analysis program are built in microprocessor, in the time receiving the discharge signal sending over from leading portion, will automatically carry out frequency analysis, amplitude analysis etc. to it, tentatively judge that partial discharges fault type and electric discharge are strong and weak.And by the signal comparison to diverse location aerial array, multithreading overall treatment is from the electric discharge electromagnetic wave signal of different sensors.Adopt finder to judge discharge position.
Preferred further, data communication module comprises RS232 module and RS485 module.
Preferred further, data memory module adopts hard-disc storage.Memory space is large.
Preferred further, A/D converter adopts independent A/D conversion chip.A/D converter adopts 16 sigma-delta ADC of microprocessor internal.Under single, the switching rate of A/D converter, up to 50ksps, is supported single channel signal input and differential signal input pattern.The data that A/D converter gathers can autostore in microprocessor internal impact damper, reduce system operation time.
Preferred further, D/A converter adopts independent D/A conversion chip.D/A converter adopts the chip DAC8562SDGSR of company of Texas Instrument (TI).DAC8562 has that 16 of 2.5V, 4ppm/ ℃ benchmark, two-way, low-power consumption, ultralow short-time pulse waveform disturb, the DAC of buffer voltagc output.DAC8562 chip and microcontroller 1 are by standard SPI interface communication.DAC8562 has the separate analog voltage output port of two-way (VoutA and VoutB).
Preferred further, data communication module is connected with aerial array receiver.Ensure magnanimity telecommunication management real-time between measurement mechanism and background service system.
The beneficial effect that the utility model has is:
The described 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array can be realized 24 hours microwave signals of being launched by shelf depreciation around on-line monitoring 10V switch cubicle, and then realizes the on-line monitoring to 10V inside switch cabinet discharge fault.The on-line monitoring of internal discharge fault adopts frequency electromagnetic waves survey sensor, can realize the electromagnetic intensity of measurement point is carried out to Measurement accuracy.Memory module in device has ensured the mass memory of measurement data.Communication module in device has ensured magnanimity telecommunication management real-time between measurement mechanism and background service system.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is variable-gain amplification circuit schematic diagram of the present utility model;
Fig. 3 is current signal converting voltage signal circuit schematic diagram of the present utility model;
Fig. 4 is bandwidth-limited circuit schematic diagram of the present utility model;
Fig. 5 is D/A converter circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1,10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array described in the utility model, comprise aerial array receiver, aerial array receiver connects variable gain amplifier, variable gain amplifier is by current signal converting voltage signal circuit connecting band bandpass filter, bandpass filter connects A/D converter, A/D converter connects D/A converter by data communication module, D/A converter connects microprocessor, and microprocessor connects failure message display screen and data memory module;
Aerial array receiver is arranged on to the cabinet outside of switch cubicle, for receiving the microwave signal of being launched by shelf depreciation, the microwave signal of reception is transferred to variable gain amplifier, through variable gain amplifier, gain sends bandpass filter by current signal converting voltage signal circuit to by converting voltage signal to through the microwave signal of gain amplification after amplifying to microwave signal, by A/D converter, signal is converted to digital signal from the voltage signal of bandpass filter process, digital signal sends D/A converter to by data communication module, by D/A converter, digital signal is reduced, signal after reduction is transferred to signal processing system, by the inside switch cabinet electric discharge intelligent diagnostics in microprocessor and the processing of fault locating analysis system, result is presented to failure message display screen, and signal message is stored in data memory module, and set up inside switch cabinet discharge signal data memory module by the division of signal of different electric discharge types.
Wherein, data communication module comprises RS232 module and RS485 module, and data memory module adopts hard-disc storage.A/D converter adopts independent A/D conversion chip, and D/A converter adopts independent D/A conversion chip.Data communication module is connected with aerial array receiver.
The utility model aerial array is made up of eight high precision electro magnetic wave survey sensors, and its survey frequency should be accomplished entire spectrum measurement in the requirement that meets measurement amplitude.The signal that aerial array gathers is transmitted through the fiber to signal gain amplifier and carries out signal amplification.
Signal, after gathering, transfers to signal gain amplifier leading portion, and Fig. 2 is signal gain amplifier schematic diagram.After gain amplifier, signal will become and be easy to be unlikely to compared with long Distance Transmission in transmission line undue decay and cause signal excessive distortion.
Current signal voltage of transformation signal circuit, by converting voltage signal to through the current signal of gain, sends bandpass filtering to.
Voltage signal is eliminated undesired signal through bandpass filtering, because frequency spectrum and the amplitude of dissimilar shelf depreciation are all had any different, so, need to carry out frequency-selecting to voltage signal.Choosing the characteristic frequency that can reflect different discharge faults classifies and processes and transmission.
Can adopt independent A/D conversion chip through the signal after bandpass filtering by A/D converter.D/A converter can adopt independent D/A conversion chip.
Microprocessor is by communication module and other external device communication.In microprocessor, be built-in with 10V inside switch cabinet partial discharge diagnosis system.Can judge the type of discharge fault, the degree of discharge fault and concrete internal discharge position.Can effectively locate partial discharges fault point.
Referring to accompanying drawing 2, provide the particular circuit configurations of the indefiniteness of a variable gain amplifier employing chip AD8330ACP.AD8330 is a DC to the 150MHz wide bandwidth variable gain amplifier of Ya De promise semiconductor (ADI) company, is applicable to requiring the application of fully differential signal path, low noise, explication gain and appropriate low distortion.The basic gain function of this chip is linear dB, is subject to the alive control of executing on pin VDBS.Gain margin is 0dB to 50dB, and corresponding control voltage is 0V to 1.5V, and slope is 30mV/dB.
Represent the particular circuit configurations figure of an indefiniteness of current signal voltage of transformation signal circuit referring to accompanying drawing 3, current signal converts voltage signal to through current signal voltage of transformation signal circuit, and current signal voltage of transformation signal circuit is made up of operational amplifier A DA4841-2.ADA4841-2 is a unity gain stable type, low noise and low distortion, the rail-to-rail output amplifier of Ya De promise semiconductor (ADI) company, and maximum static current is 1.5mA.The current signal of input is transformed into voltage signal by the first half of current signal voltage of transformation signal circuit, and the voltage signal of conversion is carried out homophase amplification or voltage follow processing by the latter half of circuit, then input tape pass filter.
Represent the particular circuit configurations figure of an indefiniteness of bandpass filtering referring to accompanying drawing 4, the voltage signal of current signal voltage of transformation signal circuit output is carried out to bandpass filtering treatment, bandwidth-limited circuit is made up of operational amplifier A DA4841-2.Bandpass filtering is made up of a Hi-pass filter and a low-pass filter.Utilize two operational amplifier A DA4841-2 to build respectively Hi-pass filter and low-pass filter, then the two series connection is obtained to bandpass filter.
Provided the particular circuit configurations of the indefiniteness of D/A converter referring to accompanying drawing 5.D/A converter adopts the chip DAC8562SDGSR of company of Texas Instrument (TI).DAC8562 has that 16 of 2.5V, 4ppm/ ℃ benchmark, two-way, low-power consumption, ultralow short-time pulse waveform disturb, the DAC of buffer voltagc output.DAC8562 chip and microcontroller 1 are by standard SPI interface communication.DAC8562 has the separate analog voltage output port of two-way (VoutA and VoutB).
Claims (6)
1. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array, it is characterized in that: comprise aerial array receiver, aerial array receiver connects variable gain amplifier, variable gain amplifier is by current signal converting voltage signal circuit connecting band bandpass filter, bandpass filter connects A/D converter, A/D converter connects D/A converter by data communication module, D/A converter connects microprocessor, and microprocessor connects failure message display screen and data memory module.
2. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array according to claim 1, is characterized in that: described data communication module comprises RS232 module and RS485 module.
3. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array according to claim 1, is characterized in that: described data memory module adopts hard-disc storage.
4. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array according to claim 1, is characterized in that: described A/D converter adopts independent A/D conversion chip.
5. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array according to claim 1, is characterized in that: described D/A converter adopts independent D/A conversion chip.
6. the 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array according to claim 1, is characterized in that: described data communication module is connected with aerial array receiver.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881628.8U CN203705594U (en) | 2013-12-30 | 2013-12-30 | 10V switch cabinet internal discharge detector based on electromagnetic wave antenna reception array |
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| CN201320881628.8U CN203705594U (en) | 2013-12-30 | 2013-12-30 | 10V switch cabinet internal discharge detector based on electromagnetic wave antenna reception array |
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| CN201320881628.8U Expired - Fee Related CN203705594U (en) | 2013-12-30 | 2013-12-30 | 10V switch cabinet internal discharge detector based on electromagnetic wave antenna reception array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
| CN112017907A (en) * | 2020-08-13 | 2020-12-01 | 黄山学院 | Vacuum degree degradation non-contact detection method of vacuum circuit breaker and early warning device thereof |
-
2013
- 2013-12-30 CN CN201320881628.8U patent/CN203705594U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
| CN111273137B (en) * | 2020-02-21 | 2022-08-05 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
| CN112017907A (en) * | 2020-08-13 | 2020-12-01 | 黄山学院 | Vacuum degree degradation non-contact detection method of vacuum circuit breaker and early warning device thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20181230 |