CN105606888A - Extensible electric energy quality measurement module and electric energy quality measurement system thereof - Google Patents
Extensible electric energy quality measurement module and electric energy quality measurement system thereof Download PDFInfo
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- CN105606888A CN105606888A CN201610009479.4A CN201610009479A CN105606888A CN 105606888 A CN105606888 A CN 105606888A CN 201610009479 A CN201610009479 A CN 201610009479A CN 105606888 A CN105606888 A CN 105606888A
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- 238000004891 communication Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
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- 230000006870 function Effects 0.000 abstract description 4
- 238000004422 calculation algorithm Methods 0.000 abstract description 3
- 238000013500 data storage Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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Abstract
The invention provides an extensible electric energy quality measurement module and an electric energy quality measurement system thereof. The electric energy quality measurement module comprises an AD conversion circuit for receiving a voltage channel signal and a current channel signal, a frequency tracking circuit receiving the voltage channel signal, a DSP processor for receiving a signal from the AD conversion circuit and a signal from the frequency tracking circuit, a DDR memory connecting the DSP processor, a flash memory connecting the DSP processor, and a communication interface connecting the DSP processor. According to the technical scheme, complex algorithms are integrated into one module; real-time electric energy quality data meeting the international electric energy quality standard are outputted to external equipment; and extension of a plurality of modules is supported. Functions of integrated sampling, frequency tracking, and data storage are integrated into the module; the size is small and the precision is high; various communication interfaces are supported; and the extendibility is high.
Description
Technical field
The present invention relates to the to power system of Power Quality Monitoring Technology and embedded association area, specifically relates to a kind of extendiblePower quality measurement module and power quality measurement system.
Background technology
In view of the continuous lifting of country to the requirement of the power supply quality of power supply and the increasing of monitoring dynamics, electric energy quality monitoring market demandAlso more and more. Because of power quality data computational algorithm complexity, on market, existing product is mostly very different, precision not orPerson's function can not meet the demands, and major part is all a whole set of system, poor expandability.
In prior art, high performance electric energy quality monitoring module adopts the one of FPGA+DSPC6000+ARM/PowerPC mostlyChange Integrated Solution, system architecture complexity, poor expandability. And the equipment for monitoring power quality of low performance adopts FPGA+ mostlyThe scheme of DSP2812 or DSP28335, performance is low, and low precision can not meet the demands completely.
Along with the development of integrated circuit, DSP performance from strength to strength, also more and more extensive in field application such as Digital Signal Processing.Needed in the past the application scenario of multiple processor collaborative works, can replace with a high performance DSP completely.
At present, the High Performance DSP processor C66X series of the KeyStone multicore architecture that TI company releases, its operation dominant frequency canUp to 1.25G, number of cores can reach 8 cores, and its operational performance reaches as high as 320GMACs, 160GFLOPs, by means of itsThe superpower performance of digital processing field, can meet its requirement aspect electric energy quality monitoring completely.
For solving the problems of the technologies described above, the invention provides a kind of extendible power quality measurement module and power quality measurement systemSystem.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of extendible power quality measurement module and quality of power supply meterAmount system.
Realizing the solution that above-mentioned purpose adopts is:
A kind of extendible power quality measurement module, its improvements are: described power quality measurement module comprises reception electricityThe A/D convertor circuit of pressure passageway signal and current channel signal, the frequency tracking circuit that receives described voltage channel signal, receptionThe signal of described A/D convertor circuit with the dsp processor of the signal of described frequency tracking circuit, be connected described DSP respectively and processThe DDR memory of device and Flash memory, and connect the communication interface of described dsp processor;
Described A/D convertor circuit, receives described voltage channel signal and current channel signal and carries out analog-to-digital conversion, by conversion afterResult is transferred to described dsp processor;
Described frequency tracking circuit, follows the tracks of the frequency of 3 road signals in described voltage channel signal, and by frequency signalBe transferred to described dsp processor;
Described dsp processor, the sampling rate of the circuit according to the signal of described frequency tracking circuit output to AD conversion is controlledSystem, according to the result of described A/D convertor circuit output carry out computing draw 3 second whole power quality datas, and by result storeIn DDR memory and Flash memory;
Described communication interface, receives the signal that described dsp processor sends over and signal is exported to external equipment, connects simultaneouslyReceive the signal that external equipment sends over, and signal is transferred to dsp processor.
Preferably, the input signal of described power quality measurement module is 8 analog channel signals; Comprise 4 voltage channel lettersNumber and 4 current channel signals.
Preferably, described dsp processor carries out communication by communication interface circuit and described external equipment.
Preferably, described DDR memory, store ephemeral data in described dsp processor calculating process and 3 second electric energy matterAmount data;
Described Flash memory, store described dsp processor output 3 second power quality data.
Preferably, described DDR memory, stores the ephemeral data of described dsp processor, no longer storage after power-off;
Described Flash memory, stores the power quality data that described dsp processor sends, and after power-off, data are not lost.
Preferably, described communication interface comprises Ethernet interface, SPI interface and RS232 interface.
A power quality measurement system for extendible power quality measurement module based on as described in as arbitrary in claim 1-6, itsImprovements are: described system comprises N described Power Quality Detection module that connects respectively external equipment, described electric energy matterAmount detection module received current channel input signal and voltage channel input signal respectively; N >=2;
Described power quality measurement module comprises A/D convertor circuit, the reception institute of receiver voltage channel signal and current channel signalState voltage channel signal frequency tracking circuit, receive the signal of described A/D convertor circuit and the signal of described frequency tracking circuitDsp processor, the DDR memory that connects respectively described dsp processor and Flash memory, and connect described DSPThe communication interface of processor.
Compared with immediate prior art, the present invention has following beneficial effect:
In scheme provided by the invention, complicated algorithm is integrated in a module, final output meets international quality of power supply markAccurate real-time power quality data, to external equipment, is supported multiple module expanded functions; Integrated sampling in this module, frequency-tracking,Data storage function, volume is little, and precision is high, supports various communication interfaces, and extensibility is strong. This module can be to electric current and voltageTunnels analogy input signal carries out power quality data computing, by the result store of computing in local Flash memory, simultaneouslyThe result of computing can be sent to external equipment by communication interface.
The extensibility of the electric weight mass metrology module based on system of the present invention, further provides power quality measurement system, shouldSystem possesses very strong flexibility, can carry out Multi-channel monitoring simultaneously.
Brief description of the drawings
Fig. 1 is the structure chart of extendible electric energy quality monitoring module provided by the invention;
Fig. 2 is extendible electric energy quality monitoring module multimode expansion structure figure provided by the invention.
Detailed description of the invention
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail. Although shown example of the present disclosure in accompanying drawingProperty embodiment, but should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms,Structure, logic, electric, process and other changes that other embodiments can comprise. Embodiment only represents possibilityVariation. On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can be by the scope of the present disclosureIntactly convey to those skilled in the art. Herein, these embodiments of the present invention can be by individually or overall artLanguage " invention " represents, this is only used to conveniently, and if in fact disclose the invention that exceedes, be not want fromThe scope that limits this application is any single invention or inventive concept movingly.
As shown in Figure 1, Fig. 1 is the structure chart of extendible electric energy quality monitoring module provided by the invention; Provided by the inventionA kind of extendible electric energy quality monitoring module, comprises frequency tracking circuit, A/D convertor circuit, dsp processor, DDR storageDevice, Flash memory and communication interface.
The input signal of power quality measurement module is 8 analog channel signals, comprises 4 voltage channel signals and 4 electric currentsChannel signal.
Frequency tracking circuit is followed the tracks of the frequency of 3 road signals in voltage channel signal, and frequency signal is transferred to DSPProcessor.
A/D convertor circuit carries out analog-to-digital conversion to 8 tunnel analog channel signals, and the result after conversion is transferred to dsp processor.
Dsp processor, the sampling rate of the circuit according to the signal of frequency tracking circuit output to AD conversion is controlled, and rootAccording to the result of A/D convertor circuit output carry out computing draw 3 second whole power quality datas, and result store is stored at DDRIn device and Flash memory; Dsp processor can also carry out communication by communication interface circuit and external equipment.
DDR memory for preserve dsp processor calculating process ephemeral data and 3 second power quality data; Flash depositsReservoir for store dsp processor output whole 3 second power quality data.
Described DDR memory, stores the ephemeral data of described dsp processor, no longer storage after power-off; Described Flash storageDevice, stores the power quality data that described dsp processor sends, and after power-off, data are not lost.
Communication interface, the signal that reception dsp processor sends over is also exported to external equipment by signal, outside can receiving simultaneouslyThe signal that portion's equipment sends over, and signal is transferred to dsp processor. Realize power quality measurement module and external equipmentData communication.
A kind of specific embodiment is provided, wherein:
Frequency tracking circuit, receiver voltage channel input signal, through the unlimited gain multiple feedback electricity based on amplifier OPA4244The bandpass filter that road forms, remaining first-harmonic composition only after filtering high-frequency harmonic, first-harmonic composition is again through by forming based on LM393The square-wave signal of zero-crossing comparator output and input signal same frequency, the square-wave signal of output is input to dsp processor.
A/D convertor circuit adopts the analog to digital conversion circuit based on AD7606 chip, and dsp processor is controlled analog-to-digital intervalMake, and read the transformation result of AD7606.
Dsp processor adopts the dual core processor of TI company's T MS320C66x series, and dsp processor is defeated according to frequency tracking circuitIn the square-wave signal cycle going out, calculate the analog-to-digital time interval and control A/D convertor circuit and carry out one-off pattern number conversion, guaranteesEvery cycle sampling number 1024 points, the data that DSP obtains according to sampling are carried out power quality data calculating, draw satisfiedThe power quality data that IEC61000-4-30 international standard specifies.
Meanwhile, the result store that DSP obtains computing is in Flash memory; When DSP receives reading that external equipment sendsWhen power quality data request, it can send to external module by corresponding data.
Internal memory when DDR memory moves as dsp processor, the 512MBDDR3 internal memory of company of employing Micron Technology; Flash depositsReservoir, for storing the power quality data that DSP computing draws, adopts the 1GBNandFlash memory of company of Micron Technology.
Communication interface comprises three kinds of Ethernets, SPI interface, RS232 interface, and it is for connecting external equipment and dsp processor;Ethernet interface adopts DM9000 chip to realize; The interface circuit that SPI interface uses dsp processor to carry; RS232 interfaceThe interface circuit that uses dsp processor to carry.
In the time that external equipment is connected with this module, only need the corresponding communication interface of external equipment and this module to be connected, external equipment canBeing conventional flush bonding processor, as single-chip microcomputer, ARM etc., can be also PC, uses network interface to connect. As shown in Figure 2,Fig. 2 is extendible electric energy quality monitoring module multimode expansion structure figure provided by the invention.
The invention provides a kind of Power Quality Detection system based on extendible Power Quality Detection module, comprise that N connects respectivelyConnect the described Power Quality Detection module of external equipment, N >=2; Described Power Quality Detection module receives input signal, to inputSignal is processed and by result store and output.
Input signal is 8 analog channel signals; Comprise respectively 4 voltage channel signals and 4 current channel signals.
Wherein, power quality measurement module comprises A/D convertor circuit, the reception of receiver voltage channel signal and current channel signalThe frequency tracking circuit of described voltage channel signal, receive the signal of described A/D convertor circuit and the letter of described frequency tracking circuitNumber dsp processor, the DDR memory that connects respectively described dsp processor and Flash memory, and connect described inThe communication interface of dsp processor.
A/D convertor circuit, receives described voltage channel signal and carries out analog-to-digital conversion, and the result after conversion is transferred to described DSPProcessor;
Frequency tracking circuit, follows the tracks of the frequency of 3 road signals in described voltage channel signal, and frequency signal is transmittedGive described dsp processor;
Dsp processor, the sampling rate of the circuit according to the signal of described frequency tracking circuit output to AD conversion is controlled,According to the result of described A/D convertor circuit output carry out computing draw 3 second whole power quality datas, and result store is existedIn DDR memory and Flash memory;
Communication interface, receives the signal that described dsp processor sends over and signal is exported to external equipment, outside receiving simultaneouslyThe signal that portion's equipment sends over, and signal is transferred to dsp processor.
Finally should be noted that: above embodiment is only for the application's technical scheme being described but not restriction to its protection domain,Although the application is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: this areaTechnical staff still can carry out all changes, revises or be equal to replacement to the detailed description of the invention of application after reading the application, butThese change, revise or be equal to replacement, within the claim protection domain all awaiting the reply in application.
Claims (7)
1. an extendible power quality measurement module, is characterized in that: described power quality measurement module comprises receiver voltageThe A/D convertor circuit of channel signal and current channel signal, the frequency tracking circuit that receives described voltage channel signal, reception instituteState the dsp processor of the signal of A/D convertor circuit and the signal of described frequency tracking circuit, be connected described dsp processor respectivelyDDR memory and Flash memory, and connect the communication interface of described dsp processor;
Described A/D convertor circuit, receives described voltage channel signal and current channel signal and carries out analog-to-digital conversion, by conversion afterResult is transferred to described dsp processor;
Described frequency tracking circuit, follows the tracks of the frequency of 3 road signals in described voltage channel signal, and by frequency signalBe transferred to described dsp processor;
Described dsp processor, the sampling rate of the circuit according to the signal of described frequency tracking circuit output to AD conversion is controlledSystem, according to the result of described A/D convertor circuit output carry out computing draw 3 second whole power quality datas, and by result storeIn DDR memory and Flash memory;
Described communication interface, receives the signal that described dsp processor sends over and signal is exported to external equipment, connects simultaneouslyReceive the signal that external equipment sends over, and signal is transferred to dsp processor.
2. the extendible power quality measurement module of one as claimed in claim 1, is characterized in that: described quality of power supply meterThe input signal of amount module is 8 analog channel signals; Comprise 4 voltage channel signals and 4 current channel signals.
3. the extendible power quality measurement module of one as claimed in claim 1, is characterized in that: described dsp processorCarry out communication by communication interface circuit and described external equipment.
4. the extendible power quality measurement module of one as claimed in claim 1, is characterized in that: described DDR memory,Store ephemeral data in described dsp processor calculating process and 3 second power quality data;
Described Flash memory, store described dsp processor output 3 second power quality data.
5. the extendible power quality measurement module of one as claimed in claim 4, is characterized in that: described DDR storageDevice, stores the ephemeral data of described dsp processor, no longer storage after power-off;
Described Flash memory, stores the power quality data that described dsp processor sends, and after power-off, data are not lost.
6. the extendible power quality measurement module of one as claimed in claim 1, is characterized in that: described communication interface bagDraw together Ethernet interface, SPI interface and RS232 interface.
7. a power quality measurement system for the extendible power quality measurement module based on as described in as arbitrary in claim 1-6,It is characterized in that: described system comprises N described power quality measurement module that connects respectively external equipment, the described quality of power supplyDetection module is received current channel input signal and voltage channel input signal respectively; N >=2;
Described power quality measurement module comprises A/D convertor circuit, the reception institute of receiver voltage channel signal and current channel signalState voltage channel signal frequency tracking circuit, receive the signal of described A/D convertor circuit and the signal of described frequency tracking circuitDsp processor, the DDR memory that connects respectively described dsp processor and Flash memory, and connect described DSPThe communication interface of processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610009479.4A CN105606888A (en) | 2016-01-07 | 2016-01-07 | Extensible electric energy quality measurement module and electric energy quality measurement system thereof |
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| CN201610009479.4A CN105606888A (en) | 2016-01-07 | 2016-01-07 | Extensible electric energy quality measurement module and electric energy quality measurement system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
| CN112834819A (en) * | 2021-01-04 | 2021-05-25 | 杭州万高科技股份有限公司 | Digital signal processing device and method for electric energy metering chip |
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| CN201615930U (en) * | 2009-11-16 | 2010-10-27 | 深圳市华力特电气股份有限公司 | An online power quality monitor and power quality monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
| CN112834819A (en) * | 2021-01-04 | 2021-05-25 | 杭州万高科技股份有限公司 | Digital signal processing device and method for electric energy metering chip |
| CN112834819B (en) * | 2021-01-04 | 2024-04-02 | 杭州万高科技股份有限公司 | Digital signal processing device and method for electric energy metering chip |
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Application publication date: 20160525 |