CN103713243B - 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array - Google Patents
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
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Abstract
The present invention open one detection device, particularly to a kind of 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array.Including antenna array receiver device, antenna array receiver device connects variable gain amplifier, variable gain amplifier connects band filter by current signal converting voltage signal circuit, band filter connects A/D converter, A/D converter connects D/A converter by data communication module, D/A converter connects microprocessor, and microprocessor connects fault message display screen and data memory module.Present configuration is simple, it is capable of the microwave signal launched by shelf depreciation around on-line monitoring 10V switch cubicle 24 hours, and then realize the on-line monitoring to 10V inside switch cabinet discharge fault, practical, ensured the mass memory of measurement data by memory module, ensure magnanimity telecommunication management real-time between measurement apparatus and background service system by communication module.
Description
Technical field
The present invention open one detection device, discharges particularly to a kind of 10V inside switch cabinet based on electromagnetic antenna receiving array
Detection device, particularly to the device and the measuring method that include that fault location judges with fault type.
Background technology
10V switch cubicle range of application is huge, and running environment is different, due to long-term switch on-off process, understands its ageing process institute
The stage at place is significant to safe operation of power system.Detection for partial discharge of switchgear at present is based on monitoring in real time putting
Electricity presence or absence.The index that neither one can quantify to monitor can reflect the ageing process of switch cubicle accurately.In 10V switch cubicle
Electrical device distribution is concentrated, and the problem caused due to shelf depreciation is different, needs to detect concrete fault type, so understand therefore
Barrier reason.When the detection fault of switch cabinet of converting station shelf depreciation, being substantially the amplitude by discharge signal, frequency etc. is passed through to close
The supposition of reason obtains discharge fault type.This method is practical, but bad to novel fault then accuracy.Need one more
For accurately, from the fault detection method of mechanism.
In 10V switch cubicle, the determination of partial discharges fault position is significant to the partial discharges fault analysis of causes of switch cabinet,
And in existing research, the research for partial discharge position is the big weakness of in existing research, there is not yet rationally report so far.10V
Partial discharge of switchgear data are generally only used for the detection working as time fault, and partial discharge of switchgear is to ultimately resulting in switch cubicle fault
Even blast is a long-term process.Detection to shelf depreciation should also be an evolution comprehensive, holocyclic.Want
Have a clear understanding of the process that the shelf depreciation causing trouble of switch cubicle even explodes, it is necessary to gather the signal of various shelf depreciation, fixed
The information such as position, set up the data base for the scientific forecasting switch cubicle life-span.
Summary of the invention
According to above deficiency of the prior art, the problem to be solved in the present invention is: provide the one can on-line checking, practical
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array.
The technical solution adopted for the present invention to solve the technical problems is:
Described 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array, including antenna array receiver device,
Antenna array receiver device connects variable gain amplifier, and it is logical that variable gain amplifier connects band by current signal converting voltage signal circuit
Wave filter, band filter connects A/D converter, and A/D converter connects D/A converter, D/A converter by data communication module
Connecting microprocessor, microprocessor connects fault message display screen and data memory module；
Antenna array receiver device is arranged on outside the cabinet of switch cubicle, for receiving the microwave signal launched by shelf depreciation, will connect
The microwave signal transmission received passes through current signal to variable gain amplifier, microwave signal after variable-gain amplifier gain amplifies
The microwave signal amplified through gain is converted into voltage signal and sends band filter to by converting voltage signal circuit, from band filter
The voltage signal of process converts a signal into digital signal by A/D converter, and digital signal sends D/A to by data communication module
Transducer, is reduced digital signal by D/A converter, and the signal after reduction is transferred to signal processing system, passes through microprocessor
In the process of inside switch cabinet electric discharge intelligent diagnostics and fault locating analysis system, result is shown at fault message display screen, and
Signal message is stored in data memory module, and sets up inside switch cabinet discharge signal by the signal division of different electric discharge types
Data memory module.
Electric discharge intelligent diagnostics is built in microprocessor, when receiving the electric discharge sended over from leading portion with fault locating analysis program
During signal, automatically it frequency analysis, amplitude analysis etc. be will be carried out, partial discharges fault type and electric discharge power is tentatively judged.
And by comparing the signal of diverse location aerial array, multithreading integrated treatment is from the electric discharge electromagnetic wave signal of different sensors.
Use finder that discharge position is judged.
Preferred further, data communication module includes RS232 module and RS485 module.
Preferred further, data memory module uses hard-disc storage.Amount of storage is big.
Preferred further, A/D converter uses single A/D conversion chip.A/D converter uses microprocessor internal 16
Position sigma-delta ADC.Under single channel model, the switching rate of A/D converter is up to 50ksps, supports that single channel signal is defeated
Enter and differential signal input pattern.The data of A/D converter collection can be stored automatically in microprocessor internal buffer, reduces
System operation time.
Preferred further, D/A converter uses single D/A conversion chip.D/A converter uses Texas Instrument (TI) company
Chip DAC8562SDGSR.DAC8562 be have 16 of 2.5V, 4ppm/ DEG C of benchmark, two-way, low-power consumption, ultralow short
Time impulse waveform interference, buffer voltagc output DAC.DAC8562 chip is communicated by standard SPI interface with microcontroller 1.
DAC8562 has the analog voltage output port (VoutA and VoutB) that two-way is separate.
Preferred further, data communication module is connected with antenna array receiver device.Measurement apparatus and background service system are ensured
Between real-time magnanimity telecommunication management.
The present invention is had the beneficial effect that
Described 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array is capable of 24 hours prisons online
Survey the microwave signal launched around 10V switch cubicle by shelf depreciation, so realize 10V inside switch cabinet discharge fault online
Monitoring.The on-line monitoring of internal discharge fault uses high-frequency electromagnetic wave measurement sensor, it is possible to achieve the electromagnetic wave to measurement point
Intensity is accurately measured.Memory module in device has ensured the mass memory of measurement data.Communication module guarantee in device
Magnanimity telecommunication management real-time between measurement apparatus and background service system.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the variable-gain amplification circuit schematic diagram of the present invention；
Fig. 3 is the current signal converting voltage signal circuit schematic diagram of the present invention；
Fig. 4 is the bandwidth-limited circuit schematic diagram of the present invention；
Fig. 5 is the D/A converter circuit theory diagrams of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are described further:
As it is shown in figure 1,10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array of the present invention, including
Antenna array receiver device, antenna array receiver device connects variable gain amplifier, and variable gain amplifier turns voltage by current signal
Signal circuit connects band filter, and band filter connects A/D converter, and A/D converter connects D/A by data communication module
Transducer, D/A converter connects microprocessor, and microprocessor connects fault message display screen and data memory module；
Antenna array receiver device is arranged on outside the cabinet of switch cubicle, for receiving the microwave signal launched by shelf depreciation, will connect
The microwave signal transmission received passes through current signal to variable gain amplifier, microwave signal after variable-gain amplifier gain amplifies
The microwave signal amplified through gain is converted into voltage signal and sends band filter to by converting voltage signal circuit, from band filter
The voltage signal of process converts a signal into digital signal by A/D converter, and digital signal sends D/A to by data communication module
Transducer, is reduced digital signal by D/A converter, and the signal after reduction is transferred to signal processing system, passes through microprocessor
In the process of inside switch cabinet electric discharge intelligent diagnostics and fault locating analysis system, result is shown at fault message display screen, and
Signal message is stored in data memory module, and sets up inside switch cabinet discharge signal by the signal division of different electric discharge types
Data memory module.
Wherein, data communication module includes RS232 module and RS485 module, and data memory module uses hard-disc storage.A/D
Transducer uses single A/D conversion chip, and D/A converter uses single D/A conversion chip.Data communication module and antenna
Array receiver is connected.
Inventive antenna array is made up of eight high accuracy electromagnetic wave measurement sensors, and it measures frequency should be in satisfied measurement amplitude
Accomplish in requirement that entire spectrum is measured.The signal that aerial array is gathered is transmitted through the fiber to signal gain amplifier to carry out signal and puts
Greatly.
Signal is after gathering, and transmission is to signal gain amplifier leading portion, and Fig. 2 is signal gain amplifier principle figure.Through putting
After large gain, signal will become and be prone to relatively long distance transmission and be unlikely in transmission line undue decay and cause signal excessive distortion.
Current signal through gain is converted into voltage signal by current signal voltage of transformation signal circuit, sends bandpass filtering to.
Voltage signal eliminates interference signal, owing to frequency spectrum and the amplitude of dissimilar shelf depreciation are all had any different, institute through bandpass filtering
With, need voltage signal is carried out frequency-selecting.Choose and can reflect that the characteristic frequency of different discharge fault carries out classification and processes and transmission.
Signal after bandpass filtering can use single A/D conversion chip by A/D converter.D/A converter is permissible
Use single D/A conversion chip.
Microprocessor is by communication module and other external device communication.Microprocessor is built-in with 10V inside switch cabinet local put
Electrodiagnosis system.May determine that degree and the concrete internal discharge position of the type of discharge fault, discharge fault.Can be effective
Location partial discharges fault point.
See accompanying drawing 2, give the physical circuit knot of the indefiniteness that a variable gain amplifier uses chip AD8330ACP
Structure.AD8330 is a DC to the 150MHz wide bandwidth variable gain amplifier of Ya De promise quasiconductor (ADI) company, is suitable for wanting
Ask fully differential signal path, low noise, explication gain and the application of moderately low distortion.The basic gain function of this chip
For linear dB, executed alive control by pin VDBS.Gain ranging is 0dB to 50dB, and the corresponding voltage that controls is 0
V to 1.5V, slope is 30mV/dB.
Seeing the particular circuit configurations figure that accompanying drawing 3 represents an indefiniteness of current signal voltage of transformation signal circuit, electric current is believed
Number being converted into voltage signal through current signal voltage of transformation signal circuit, current signal voltage of transformation signal circuit is by operational amplifier
ADA4841-2 forms.ADA4841-2 is a unity gain stable type of Ya De promise quasiconductor (ADI) company, low noise and low
Distortion, rail-to-rail output amplifier, maximum static current is 1.5mA.The first half of current signal voltage of transformation signal circuit
The current signal of input is transformed into voltage signal, and the voltage signal of conversion is carried out homophase amplification or voltage by the latter half of circuit
Follow process, then input tape pass filter.
See the particular circuit configurations figure that accompanying drawing 4 represents an indefiniteness of bandpass filtering, to current signal voltage of transformation signal
The voltage signal of circuit output carries out bandpass filtering treatment, and bandwidth-limited circuit is made up of operational amplifier A DA4841-2.Band is logical
Filtering is made up of a high pass filter and a low pass filter.Two operational amplifier A DA4841-2 are utilized to build height respectively
Bandpass filter and low pass filter, then obtain band filter by the two series connection.
See the particular circuit configurations that accompanying drawing 5 gives the indefiniteness of D/A converter.D/A converter uses Texas Instrument (TI)
The chip DAC8562SDGSR of company.DAC8562 be have 16 of 2.5V, 4ppm/ DEG C of benchmark, two-way, low-power consumption,
The interference of ultralow short-time pulse waveform, the DAC of buffer voltagc output.DAC8562 chip and microcontroller 1 pass through standard SPI interface
Communication.DAC8562 has the analog voltage output port (VoutA and VoutB) that two-way is separate.
Claims (6)
1. a 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array, it is characterised in that: include sky
Linear array receptor, antenna array receiver device connects variable gain amplifier, and variable gain amplifier turns voltage by current signal
Signal circuit connects band filter, and band filter connects A/D converter, and A/D converter connects D/A by data communication module
Transducer, D/A converter connects microprocessor, and microprocessor connects fault message display screen and data memory module；
Antenna array receiver device is arranged on outside the cabinet of switch cubicle, for receiving the microwave signal launched by shelf depreciation, will
The microwave signal transmission received passes through electric current to variable gain amplifier, microwave signal after variable-gain amplifier gain amplifies
The microwave signal amplified through gain is converted into voltage signal and sends band filter to by signal converting voltage signal circuit, logical from band
The voltage signal of wave filter process converts a signal into digital signal by A/D converter, and digital signal is passed by data communication module
Giving D/A converter, reduced by digital signal by D/A converter, the signal after reduction is transferred to signal processing system, passes through
Inside switch cabinet electric discharge intelligent diagnostics in microprocessor and the process of fault locating analysis system, show result at fault message
Display screen, and signal message is stored in data memory module, and set up switch cubicle by the signal division of different electric discharge types
Internal discharge signal data memory module.
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array the most according to claim 1,
It is characterized in that: described data communication module includes RS232 module and RS485 module.
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array the most according to claim 1,
It is characterized in that: described data memory module uses hard-disc storage.
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array the most according to claim 1,
It is characterized in that: described A/D converter uses single A/D conversion chip.
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array the most according to claim 1,
It is characterized in that: described D/A converter uses single D/A conversion chip.
10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array the most according to claim 1,
It is characterized in that: described data communication module is connected with antenna array receiver device.
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| CN201310743134.8A CN103713243B (en) | 2013-12-30 | 2013-12-30 | 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array |
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| CN201310743134.8A CN103713243B (en) | 2013-12-30 | 2013-12-30 | 10V inside switch cabinet discharging detection device based on electromagnetic antenna receiving array |
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| CN104267320A (en) * | 2014-10-08 | 2015-01-07 | 广西电网有限责任公司玉林供电局 | High-voltage switch cabinet partial discharge monitoring system based on ultrahigh-frequency electromagnetic wave detection |
| CN109406964A (en) * | 2018-11-16 | 2019-03-01 | 国网江苏省电力有限公司盐城供电分公司 | A kind of cable system partial discharge positioning method of more cut cables |
| CN110893400A (en) * | 2019-12-24 | 2020-03-20 | 杭州电力设备制造有限公司 | Sorting and receiving device for partial discharge signals of switch cabinet |
| CN111880052A (en) * | 2020-06-30 | 2020-11-03 | 国网山东省电力公司淄博供电公司 | Hand-held type partial discharge detection device based on bluetooth interconnection terminal cluster |
| 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 |
| CN113030663B (en) * | 2021-03-09 | 2024-05-03 | 安徽中科超屹科技有限公司 | Power equipment with collecting and analyzing functions |
| CN118655431B (en) * | 2024-08-20 | 2024-10-22 | 常州驰高电气有限公司 | Intelligent partial discharge on-line monitoring system and monitoring method thereof |
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