CN205139355U - Leading collection system suitable for system is compared to total mark electric quantity - Google Patents
Leading collection system suitable for system is compared to total mark electric quantity Download PDFInfo
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- CN205139355U CN205139355U CN201520907327.7U CN201520907327U CN205139355U CN 205139355 U CN205139355 U CN 205139355U CN 201520907327 U CN201520907327 U CN 201520907327U CN 205139355 U CN205139355 U CN 205139355U
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Abstract
The utility model discloses a leading collection system suitable for system is compared to total mark electric quantity, including exchanging sampling module, pulse collection module, mass data processing module, communication unit, power module. The utility model discloses an integrated electric current and voltage acquisition module obtain corresponding oscillogram simultaneously, can provide electric current and voltage parameter for the other system. And make the time correspond with the wave form of voltage, electric current is strict through increasing pulse collection module, be fit for more control system and use the utility model discloses the data of gathering. The utility model discloses take the double -core framework of DSP treater and ARM9 core processor, simplified the treatment flowsheet of treater, utilize the corresponding data of original processing of treater simultaneously for the product does not need additionally to programme, has reduced the product development degree of difficulty.
Description
Technical field
The utility model belongs to electric system checkout equipment technical field, is specifically related to a kind of front-collection device being applicable to device electricity Compare System in a kind of scene.
Background technology
Electric system backstage Electric Energy Tariff Point Metering Device O&M on-line automaticization management system needs to obtain real-time electric power data, but collecting device only can gather electric current and voltage data at present, needs the extra needs increasing other sensors and could be applicable to new system.The equipment of extra increase makes again that data are transmitted, housekeeping is numerous and diverse, adds the degree that copies and the stability of system.A kind of front-collection device being applicable to device electricity Compare System of the utility model is mainly used in high-precision high-speed rate collection site voltage and current waveform, record the Source of Gateway Meter number of pulses diagnosed simultaneously, and by these data by passage return service devices such as Fast Ethernets.The waveform signal of far end system primary responsibility to scene processes, and calculates the metering electricity in the corresponding time period, and compares with the data of Source of Gateway Meter, complete on-line testing and the fault diagnosis work of gate energy meter according to tailor-made algorithm.The voltage simultaneously obtained and current data can be supplied to other system and use.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of a kind of front-collection device being applicable to device electricity Compare System that can gather voltage and current Wave data and pulse signal.
The utility model solves the problems of the technologies described above by the following technical programs,
Be applicable to a front-collection device for device electricity Compare System, comprise AC sampling module, pulse collection module, mass data processing module, communication unit, power module, it is characterized in that,
Described AC sampling module, comprises mutual inductor and AD sampling A/D chip, the power quality data of collection site load, electric current and voltage service data, electrical energy metering data, and the harmonic data of on-the-spot load; Transformer station's mutual inductor secondary voltage and electric current are converted to weak voltage signal by described mutual inductor, are input to the sampling channel of AD sampling A/D chip;
Described AD sampling A/D chip converts input voltage to time signal, obtains voltage and current with after digital filter process;
Described pulse collection module, the pulse data of collection site waveform and gate energy meter, is sent to mass data processing module;
Described mass data processing module, be the Duo-Core Architecture of dsp processor and ARM9 core processor, described dsp processor and ARM9 core processor are by SPI port transmission data;
Described dsp processor receives the sampled data of AC sampling module acquisition and the pulse signal of pulse collection module acquisition, is passed in AMR9 core processor by the overall data after sampled data and pulse signal coupling by SPI oral instructions; Described dsp processor comprises FLASH unit, the overall data after store sample data and pulse signal mate;
Described ARM9 core processor, receives the overall data that dsp processor sends, is sent to server after carrying out data conversion by communication unit; Described ARM9 core processor comprises clock and NANDFLASH, described clock provides high-precision timing, be calibrated with server, to ARM9 core processor transmitting time signal, the overall data that time signal and dsp processor send is carried out time match by ARM9 core processor simultaneously; Described NANDFLASH stores the data of ARM9 core processor process;
The data that ARM9 core processor is changed are sent to server by described communication unit, and the steering order that delivery server sends;
Described power module, for a kind of each module of front-collection device being applicable to device electricity Compare System provides electric energy.
As optimization, described mutual inductor comprises voltage transformer (VT) summation current transformer, and described current transformer is preferably zero-flux current transformer;
As optimization, described AD sampling A/D chip is preferably sigma-delta type AD sampling A/D chip, described sigma-delta type AD sampling A/D chip realizes the high-speed sampling of 320 every cycles, thus realize the frequency band input of the highest 8kHz, number of significant digit can accomplish more than 20, enough guarantees the digital signal precision within the scope of whole current range;
Described sigma-delta type AD sampling A/D chip is ADS1274/1278 analog to digital converter;
As optimization, during first pulse that described pulse collection module acquires sends to electric energy meter, opening record ripple passage, when collecting last pulse of electric energy meter, closing record ripple passage;
As optimization, described dsp processor adopts ADIBF51 series 32 high speed and fixed-point digital signal processing chips, and process frequency reaches 400MHz, and described FLASH unit is the high speed dynamic ram of more than 16Mbyte;
As optimization, described communication unit is Ethernet, GPRS wireless data module, RS485 communication network or RS232 serial communications network;
As optimization, also have Temperature Humidity Sensor, collect temperature and humidity data, send to ARM9 core processor; The overall data that temperature and humidity data and time signal and dsp processor send is carried out time match by described ARM9 core processor;
As optimization, also has display unit, the data after the conversion of display ARM9 core processor.
The utility model, by integrated current and voltage acquisition module, obtains corresponding oscillogram simultaneously, can provide electric current and voltage parameter for other system.And make the time strictly corresponding with the waveform of voltage, electric current by increasing pulse collection module, be applicable to the data that more control system uses the utility model to gather.The utility model takes the platform of high of dsp processor and ARM9 core processor, simplifies the treatment scheme of processor, utilizes the priginal soft process corresponding data of processor simultaneously, makes product not need additionally to programme, reduces product development difficulty.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment workflow diagram;
Fig. 2 is the utility model embodiment pulse collection block flow diagram.
Embodiment
Below in conjunction with drawings and Examples, elaborate content of the present utility model further.
Be applicable to a front-collection device for device electricity Compare System, comprise AC sampling module, pulse collection module, mass data processing module, communication unit, power module, Temperature Humidity Sensor and display unit,
Described AC sampling module, comprises mutual inductor and AD sampling A/D chip, the power quality data of collection site load, electric current and voltage service data, electrical energy metering data, and the harmonic data of on-the-spot load; The sampling of described voltage and electric current is all realized by mutual inductor, and transformer station's mutual inductor secondary voltage and electric current are converted to weak voltage signal by mutual inductor, and are changed by precision resistance, are input to the sampling channel of AD sampling A/D chip.Because transformer substation voltage is general all more stable, can not there is wide swings, therefore the type selecting of voltage transformer (VT) is relatively simple, as long as reach stable angular difference and ratio near substation secondary voltage.And transformer station's electric current affects by load side, often there is fluctuation by a relatively large margin, such as electric iron locomotive is through out-of-date, the secondary current of Traction Station can between small area analysis and big current frequent fluctuation, therefore, current transformer just must have enough wide dynamic range, and within the scope of gamut, ensure good angular difference and ratio; On the other hand, on-the-spot electric current is often with comparatively obvious harmonic wave, and just there is decay for harmonic wave in mutual inductor itself, especially higher hamonic wave, for guaranteeing the accuracy of measuring, the current transformer of device also must have less decay to the amplitude of harmonic wave and phase place, thus enables gathered waveform contain all frequency ranges of on-site signal, so that server carries out accurate computational analysis as far as possible.Described mutual inductor comprises voltage transformer (VT) summation current transformer; Described current transformer is preferably zero-flux current transformer; Described zero-flux current transformer is based on electromagnetic induction principle, the magnetic flux of non-zero is the prerequisite of mutual inductor work, non-Zero flux is magnetic flux, is based upon in iron core core1, is provided by compensative winding NC, by electromagnetic induction principle generation secondary current is another iron core core2, in this core2, primary current and secondary current magnetic flux cancel each other, when reaching magnetic balance, magnetic flux is zero, thus reduces the impact that iron core is non-linear and bandwidth is narrower;
Described AD sampling A/D chip converts input voltage to time signal, obtains voltage and current with after digital filter process; AD sampling A/D chip comprises SAR type AD sampling A/D chip and sigma-delta type AD sampling A/D chip, SAR type AD sampling A/D chip is repeatedly compared from different reference voltages input simulating signal, make the digital quantity numerically Approach by inchmeal input analog amount respective value of conversion gained, the feature of this AD sampling A/D chip is that slewing rate is very fast, precision is high, but the type AD sampling A/D chip applied in power equipment, its figure place is general the highest can only to 18, although its number of significant digit ratio is high, its application in the fluctuating load metering of the limitations affect of total bit; Sigma-delta type AD sampling A/D chip is the AD sampling A/D chip that current electric energy meter is used more, its principle input voltage is converted to time (i.e. pulse width) signal, obtain digital value with after digital filter process, the type AD is the highest can accomplish 24 samplings, but sampling rate is not as SAR type AD;
Described AD sampling A/D chip is preferably sigma-delta type AD sampling A/D chip, described sigma-delta type AD sampling A/D chip realizes the high-speed sampling of 320 every cycles, thus realizing the frequency band input of the highest 8KHZ, number of significant digit can accomplish more than 20, enough guarantees the digital signal precision within the scope of whole current range;
Described pulse collection module, the pulse data of collection site waveform and gate energy meter, is sent to mass data processing module, want the electricity of accurate comparison gate energy meter, the collection of pulse and the collection of waveform just must be strict synchronous, namely when first pulse that pulse collection module acquires sends to electric energy meter, record ripple passage will be opened in real time, when pulse collection module acquires is to last pulse of electric energy meter, record ripple passage will be closed in real time, thus guarantee the synchronism of data, when one takes turns after check-verifying period starts, dsp processor starts the pulse detecting Source of Gateway Meter, when receiving first pulse, will tagging bit code, when each AD conversion completes, this mark bit code is inquired about in capital, if this marker bit set, then represent and received first pulse, now dsp processor can by the data of AD conversion stored in internal memory, until reach the maximum number of pulses of this check-verifying period setting, if do not receive first pulse, these data then can abandon by dsp processor, do not carry out internal memory stored in operation, the benefit of this method is, Waveform storage operation is triggered by Source of Gateway Meter pulse, thus reach strict synchronous,
Described mass data processing module, be the Duo-Core Architecture of dsp processor and ARM9 core processor, described dsp processor and ARM9 core processor are by SPI port transmission data;
Described dsp processor receives the sampled data of AC sampling module acquisition and the pulse signal of pulse collection module acquisition, is passed in AMR9 core processor by the overall data after sampled data and pulse signal coupling by SPI oral instructions; Described dsp processor comprises FLASH unit, the overall data after store sample data and pulse signal mate; Described dsp processor adopts ADIBF51 series 32 high speed and fixed-point digital signal processing chips, and process frequency reaches 400MHZ, and described FLASH unit is the high speed dynamic ram of more than 16Mbyte;
Described ARM9 core processor, receives the overall data that dsp processor sends, is sent to server after carrying out data conversion by communication unit; Described ARM9 core processor comprises clock and NANDFLASH, described clock provides high-precision timing, be calibrated with server, to ARM9 core processor transmitting time signal, the overall data that time signal and dsp processor send is carried out time match by ARM9 core processor simultaneously; Described NANDFLASH stores the data of ARM9 core processor process; The data that NANDFLASH stores are uploaded onto the server by the form of file;
The data that ARM9 core processor is changed are sent to server by described communication unit, and the steering order that delivery server sends; Described communication unit is Ethernet, GPRS wireless data module, RS485 communication network or RS232 serial communications network;
Described power module, for a kind of each module of front-collection device being applicable to device electricity Compare System provides electric energy;
Described Temperature Humidity Sensor, collects temperature and humidity data, sends to ARM9 core processor; The overall data that temperature and humidity data and time signal and dsp processor send is carried out time match by described ARM9 core processor;
Described display unit, the data after the conversion of display ARM9 core processor.
The utility model structure is simple, the waveform transfer gathered by a kind of front-collection device being applicable to device electricity Compare System is after server, server system will calculate the electricity of corresponding time according to Wave data, thus judges whether the gate energy meter of monitoring exists error of having good luck.By selecting the zero-flux current transformer of high linearity, this mutual inductor can keep a good ratio and angular difference within the scope of the rated current of 25 times, the measuring accuracy requirement in whole dynamic range only can be met by single hop calibration, that is the waveform of whole device collection only needs a supporting calibration parameter, and do not need multiple calibration parameter, greatly reduce the complexity that server calculates.By adopting the sigma-delta type AD being applicable to measure, its principle input voltage is converted to time (pulse width) signal, obtains digital value with after digital filter process.The type AD is the highest can accomplish 24 samplings, can realize the high-speed sampling of the highest 320 every cycles, and realize the frequency band input of the highest 8kHZ, number of significant digit can accomplish more than 20, enough guarantees the digital signal precision within the scope of whole current range.Wave data stores by the utility model front device in the form of a file, and carry out packing compression, file size can be reduced to a certain extent, system of simultaneously uploading onto the server in the form of a file, even if there occurs communication disruption in transmitting procedure, Wave data also can not be caused to lose.
Claims (8)
1. be applicable to a front-collection device for device electricity Compare System, comprise AC sampling module, pulse collection module, mass data processing module, communication unit, power module, it is characterized in that,
Described AC sampling module, comprises mutual inductor and AD sampling A/D chip, the power quality data of collection site load, electric current and voltage service data, electrical energy metering data, and the harmonic data of on-the-spot load; Transformer station's mutual inductor secondary voltage and electric current are converted to weak voltage signal by described mutual inductor, are input to the sampling channel of AD sampling A/D chip;
Described AD sampling A/D chip converts input voltage to time signal, obtains voltage and current with after digital filter process;
Described pulse collection module, the pulse data of collection site waveform and gate energy meter, is sent to mass data processing module;
Described mass data processing module, be the Duo-Core Architecture of dsp processor and ARM9 core processor, described dsp processor and ARM9 core processor are by SPI port transmission data;
Described dsp processor receives the sampled data of AC sampling module acquisition and the pulse signal of pulse collection module acquisition, is passed in AMR9 core processor by the overall data after sampled data and pulse signal coupling by SPI oral instructions; Described dsp processor comprises FLASH unit, the overall data after store sample data and pulse signal mate;
Described ARM9 core processor, receives the overall data that dsp processor sends, is sent to server after carrying out data conversion by communication unit; Described ARM9 core processor comprises clock and NANDFLASH, described clock provides high-precision timing, be calibrated with server, to ARM9 core processor transmitting time signal, the overall data that time signal and dsp processor send is carried out time match by ARM9 core processor simultaneously; Described NANDFLASH stores the data of ARM9 core processor process;
The data that ARM9 core processor is changed are sent to server by described communication unit, and the steering order that delivery server sends;
Described power module, for a kind of each module of front-collection device being applicable to device electricity Compare System provides electric energy.
2. front-collection device as claimed in claim 1, it is characterized in that, described mutual inductor comprises voltage transformer (VT) summation current transformer, and described current transformer is preferably zero-flux current transformer.
3. front-collection device as claimed in claim 1, it is characterized in that, described AD sampling A/D chip is preferably sigma-delta type AD sampling A/D chip, described sigma-delta type AD sampling A/D chip realizes the high-speed sampling of 320 every cycles, thus realize the frequency band input of the highest 8kHz, number of significant digit can accomplish more than 20, enough guarantees the digital signal precision within the scope of whole current range.
4. front-collection device as claimed in claim 3, it is characterized in that, described sigma-delta type AD sampling A/D chip is ADS1274/1278 analog to digital converter.
5. front-collection device as claimed in claim 1, it is characterized in that, described dsp processor adopts ADIBF51 series 32 high speed and fixed-point digital signal processing chips, and process frequency reaches 400MHz, and described FLASH unit is the high speed dynamic ram of more than 16Mbyte.
6. front-collection device as claimed in claim 1, it is characterized in that, described communication unit is Ethernet, GPRS wireless data module, RS485 communication network or RS232 serial communications network.
7. front-collection device as claimed in claim 1, is characterized in that, also has Temperature Humidity Sensor, collects temperature and humidity data, sends to ARM9 core processor; The overall data that temperature and humidity data and time signal and dsp processor send is carried out time match by described ARM9 core processor.
8. front-collection device as claimed in claim 1, is characterized in that, also has display unit, the data after the conversion of display ARM9 core processor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124909A (en) * | 2016-08-30 | 2016-11-16 | 淮北工科检测检验有限公司 | A kind of electric energy detection metering system |
| CN106291204A (en) * | 2016-09-30 | 2017-01-04 | 千江（上海）信息科技有限公司 | A kind of high-precise synchronization harvester |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| CN107783073A (en) * | 2017-09-27 | 2018-03-09 | 国网冀北电力有限公司承德供电公司 | Electric Energy Tariff Point Metering Device operation management system, data acquisition and alarm method |
-
2015
- 2015-11-16 CN CN201520907327.7U patent/CN205139355U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124909A (en) * | 2016-08-30 | 2016-11-16 | 淮北工科检测检验有限公司 | A kind of electric energy detection metering system |
| CN106291204A (en) * | 2016-09-30 | 2017-01-04 | 千江（上海）信息科技有限公司 | A kind of high-precise synchronization harvester |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| CN107783073A (en) * | 2017-09-27 | 2018-03-09 | 国网冀北电力有限公司承德供电公司 | Electric Energy Tariff Point Metering Device operation management system, data acquisition and alarm method |
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Granted publication date: 20160406 Termination date: 20161116 |