CN101561454A - Power quality analyzer - Google Patents
Power quality analyzer Download PDFInfo
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- CN101561454A CN101561454A CNA2008100362346A CN200810036234A CN101561454A CN 101561454 A CN101561454 A CN 101561454A CN A2008100362346 A CNA2008100362346 A CN A2008100362346A CN 200810036234 A CN200810036234 A CN 200810036234A CN 101561454 A CN101561454 A CN 101561454A
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Abstract
The invention provides a power quality analyzer which can monitor electrical network quality online for a long time and make up the deficiency of the prior power quality analyzer. The power quality analyzer comprises a digital signal processing module and a control module, wherein the digital signal processing module samples current and voltage signals of various phases in a power system and performs data switching with the control module by a high-speed communication interface, and the power quality analyzer realizes the functions of display, data statistics, storage, communication, ammeter function selection and initialized data set by the control module.
Description
Technical field
The present invention relates to a kind of electric instrument, particularly a kind of power quality analysis meter that is applicable to the power quality on-line analysis of electric system and power consumer power distribution network.
Background technology
Existing external power quality analysis series products mostly is a portable instrument, it mainly is to adopt the industrial computer mode, the realization three-phase is gathered simultaneously, but the data analysis content of this quasi-instrument is less, product reliability is not high, on-line monitoring operation for a long time, and very expensive in price, and most of domestic correspondents can't bear.
Yet the ZW5433C type power quality analyzer that the blue or green intelligence instrument in some domestic products such as Qingdao was released in 2005, though its function is more, can scheme by online display voltage current waveform/harmonic wave rod, but the external form of this product is bigger, measuring accuracy is not high, and real-time is poor, can't satisfy client's actual demand.
The DTSD341-9C type electric energy metrical pocket watch of Hunan wasion instrument has the precision height, the advantage of good reliability, but same, its external form is bigger, and display interface is single, costs an arm and a leg, and is not suitable for installing type digital instrument field.
Therefore, the client needs a kind of precision height, good reliability, many, the moderate power quality analysis meter of data analysis content, on-line monitoring power grid quality for a long time especially.
Summary of the invention
The object of the present invention is to provide a kind of power quality analysis meter, the on-line monitoring power grid quality remedies the weak point that has power quality analysis meter now for a long time.
Technical matters solved by the invention can realize by the following technical solutions:
A kind of power quality analysis meter, it is characterized in that, it comprises digital signal processing module and control module composition, by described digital signal processing module each phase current, voltage signal in the electric system are sampled, by carrying out exchanges data between high-speed communication interface and the described control module, realize demonstration, data statistics, storage, communication, ammeter function selecting and the initialization data set-up function of described power quality analysis meter by described control module.
Described digital signal processing module is by the voltage of an A/D modular converter from electric system, electric current, the voltage signal of each phase of current transformer up-sampling.
Be connected with the real-time clock module of information such as keeping tracking time and date on the described digital signal processing module, for described power quality analysis meter provides a timing standard.
Be connected with program storage block on the described digital signal processing module, described program storage block stored has the program of described digital signal processing module.
Be connected with the ferroelectric memory module that is used for real time record and store alarms data on the described digital signal processing module.
Described control module is connected with the dot matrix LCD module that is used to show, is used for the keyboard input module that described control module is controlled, the communication module that is used for communication and switching value input/output module.
But described control module is the 32 bit CPU chips based on ARM7 TDMI-S nuclear of real-time simulation and tracking.
The basic functional principle of power quality analysis meter of the present invention is:
Described digital signal processing module is sampled to each phase current, the voltage of electric system by the A/D modular converter, is finished work such as the full electrical parameter measurement of electric system, electric energy accumulative totals through corresponding mathematical computations by described digital signal processing module; Computational data carries out exchanges data by high-speed communication interface and described control chip, finish work such as demonstration, data statistics, storage, communication, ammeter function selecting and initialization data setting by described control module, described control module is integrated whole electric parameter measurements (voltage, electric current, meritorious/idle/applied power, power factor, frequency etc.), comprehensively electric energy metrical and appraisal management (just/oppositely active energy, sense/capacitive reactive power electric energy high-precision measuring; Can divide 8 periods three kinds of rates meterings this month, last month, the month before last and total electric energy etc.) and power quality analysis data (current/voltage degree of unbalancedness, current/voltage 31 order harmonic components and THD etc.).
Power quality analysis meter of the present invention has following characteristics:
1) hardware frame of employing digital signal processing module+control module, the various real time datas of analysis electric system that can be real-time fast realize analyzing processing, storage and the demonstration of data simultaneously;
2) be responsible for gathering input signal by described digital signal processing module and finish the FFT computing, and then power quality carried out accurately, real-time analysis is followed the tracks of, the technical conceive novelty, powerful, the integrated level height, compact conformation, reliable, cost is low, and information processing rate and precision control improve greatly than prior art.
3) finish exchanges data by described control module and described digital signal processing module, and realize button input, lattice lcd driving, switching value input and output control and communication.
4) display interface adopts the giant-screen dot lcd, and the graphical interfaces data are abundant, and are simple to operate easy-to-use; Can show mains by harmonics data/rod figure and waveform in real time, be convenient to the on-the-spot use of electric system.
Description of drawings
Fig. 1 is the structured flowchart of power quality analysis meter of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment
As shown in Figure 1, a kind of power quality analysis meter, it comprises digital signal processing module 1 and control module 2 compositions.
Digital signal processing module 1 is by the voltage of an A/D modular converter 3 from electric system, electric current, the voltage signal of each phase of current transformer up-sampling.
Three-phase voltage/electric current is from the voltage transformer (VT) (PT) that is disposed at electric system (or power consumer) transformer station and current transformer (CT) filtering circuit through A/D modular converter 3 and front end, to come from the voltage transformer (VT) (PT) of electric system (or power consumer) transformer station and the high-voltage large current conversion of signals of current transformer (CT) is to be fit to the weak electric signal that digital signal processing module 1 uses, and the spike interference signals on the filtered signal line.
A/D modular converter 3 is an A/D transducer (AD73360), and it has six analog input channels, and the weak electric signal that is collected is that the digital quantity of sixteen bit is to digital signal processing module 1 through A/D modular converter 3 conversion and output length.
Digital signal processing module 1 is accepted the data after 3 conversions of A/D modular converter, and real-time signal calculated frequency, by corresponding mathematical computations, is finished work such as the full electrical parameter measurement/electric energy accumulative totals of electric system by digital signal processing module 1; Digital signal processing module 1 is a DSP digital signal processor (ADSP 219x), the utilization fft algorithm calculates 2～31 subharmonic numerical value of three-phase voltage electric current, analytical calculation electric current k-factor, voltage crest factor, THFF phone shape factor and three-phase voltage current imbalance degree, parameters such as harmonic voltage electric current containing ratio, its speed is not only 4-10 times of MPU, and can continually finish the real-time input and output of data.The DSP technology in conjunction with the real-time conversion of FFT to form the subsequent conditioning circuit desired data.
Be connected with the real-time clock module 11 of information such as keeping tracking time and date on the digital signal processing module 1, for described power quality analysis meter provides a timing standard.
Real-time clock module 11 is by the production burst of the clock circuit of crystal oscillator and interlock circuit composition, and each system clock passes through real-time clock module 11 initialization at the first time-out of system.Real-time clock module 11 automatically switches to backup battery later in the VDD power down.Under the situation of using backup battery, real-time clock power consumption is seldom so that it can long-term work.
Be connected with program storage block 12 on the digital signal processing module 1, program storage block 12 stored have the program of described digital signal processing module.
Be connected with the ferroelectric memory module 13 that is used for real time record and store alarms data on the digital signal processing module 1.
But control module 2 is the 32 bit CPU chips based on ARM7 TDMI-S nuclear of real-time simulation and tracking, and control module 2 is connected with the dot matrix LCD module 21 that is used to show, is used for the keyboard input module 22 that control module 2 is controlled, the communication module 23 that is used for communication and switching value input/output module 24.
Control module 2 is finished with the exchanges data of digital signal processing module 1 and is finished the design of man-machine interface, comprise the processing of lattice lcd driving, button input, switching value input and output, report to the police output and communication etc., utilize button can realize the preservation of systematic parameter very easily, guaranteed the real practicality of this instrument structure.
Dot matrix LCD module 21 adopts the giant-screen dot lcd, and the graphical interfaces data are abundant, and are simple to operate easy-to-use; Can show mains by harmonics data/rod figure and waveform in real time, be convenient to the on-the-spot use of electric system.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1, a kind of power quality analysis meter, it is characterized in that, it comprises digital signal processing module and control module composition, by described digital signal processing module each phase current, voltage signal in the electric system are sampled, by carrying out exchanges data between high-speed communication interface and the described control module, realize demonstration, data statistics, storage, communication, ammeter function selecting and the initialization data set-up function of described power quality analysis meter by described control module.
2, power quality analysis meter as claimed in claim 1 is characterized in that: described digital signal processing module is by the voltage of an A/D modular converter from electric system, electric current, the voltage signal of each phase of current transformer up-sampling.
3, power quality analysis meter as claimed in claim 1 is characterized in that: be connected with the real-time clock module of information such as keeping tracking time and date on the described digital signal processing module, for described power quality analysis meter provides a timing standard.
4, power quality analysis meter as claimed in claim 1 is characterized in that: be connected with program storage block on the described digital signal processing module, described program storage block stored has the program of described digital signal processing module.
5, power quality analysis meter as claimed in claim 1 is characterized in that: be connected with the ferroelectric memory module that is used for real time record and store alarms data on the described digital signal processing module.
6, power quality analysis meter as claimed in claim 1 is characterized in that: described control module is connected with the dot matrix LCD module that is used to show, is used for the keyboard input module that described control module is controlled, the communication module that is used for communication and switching value input/output module.
7, power quality analysis meter as claimed in claim 6 is characterized in that: but described control module is the 32 bit CPU chips based on ARM7TDMI-S nuclear of real-time simulation and tracking.
8, power quality analysis meter as claimed in claim 7 is characterized in that: described dot matrix LCD module adopts the giant-screen dot lcd, and the graphical interfaces data are abundant, and are simple to operate easy-to-use; Can show mains by harmonics data/rod figure and waveform in real time, be convenient to the on-the-spot use of electric system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100362346A CN101561454A (en) | 2008-04-18 | 2008-04-18 | Power quality analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100362346A CN101561454A (en) | 2008-04-18 | 2008-04-18 | Power quality analyzer |
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| CN101561454A true CN101561454A (en) | 2009-10-21 |
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| CNA2008100362346A Pending CN101561454A (en) | 2008-04-18 | 2008-04-18 | Power quality analyzer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968537A (en) * | 2010-08-23 | 2011-02-09 | 太原市优特奥科电子科技有限公司 | Error magnitude calibration device and transferring method for digital power quality analyzer |
| CN103135003A (en) * | 2011-11-24 | 2013-06-05 | 上海华建电力设备股份有限公司 | Intelligent integrated monitoring device |
| CN103364664A (en) * | 2013-07-19 | 2013-10-23 | 国家电网公司 | Electric energy integrated data processing method |
| CN105467207A (en) * | 2016-01-19 | 2016-04-06 | 江苏省电力公司电力科学研究院 | High precision voltage power frequency measurement system and method based on intelligent substation |
| CN106649205A (en) * | 2016-10-18 | 2017-05-10 | 诺仪器（中国）有限公司 | Statistical information re-sampling device |
| CN106980102A (en) * | 2017-05-19 | 2017-07-25 | 中国电力科学研究院 | The device for monitoring running and method of a kind of electric energy meter field detection device |
| CN110989439A (en) * | 2019-12-05 | 2020-04-10 | 国家电网有限公司 | Power grid equipment data acquisition tool |
| CN114689982A (en) * | 2020-12-25 | 2022-07-01 | 武汉华大电力自动技术有限责任公司 | Real-time monitoring platform for key equipment of power grid |
-
2008
- 2008-04-18 CN CNA2008100362346A patent/CN101561454A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968537A (en) * | 2010-08-23 | 2011-02-09 | 太原市优特奥科电子科技有限公司 | Error magnitude calibration device and transferring method for digital power quality analyzer |
| CN101968537B (en) * | 2010-08-23 | 2013-03-20 | 太原市优特奥科电子科技有限公司 | Error magnitude calibration device and transferring method for digital power quality analyzer |
| CN103135003A (en) * | 2011-11-24 | 2013-06-05 | 上海华建电力设备股份有限公司 | Intelligent integrated monitoring device |
| CN103364664A (en) * | 2013-07-19 | 2013-10-23 | 国家电网公司 | Electric energy integrated data processing method |
| CN103364664B (en) * | 2013-07-19 | 2015-11-18 | 国家电网公司 | A kind of electric energy integrated data processing method |
| CN105467207A (en) * | 2016-01-19 | 2016-04-06 | 江苏省电力公司电力科学研究院 | High precision voltage power frequency measurement system and method based on intelligent substation |
| CN105467207B (en) * | 2016-01-19 | 2019-07-19 | 江苏省电力公司电力科学研究院 | A kind of high-accuracy voltage power frequency measuring system and method based on intelligent substation |
| CN106649205A (en) * | 2016-10-18 | 2017-05-10 | 诺仪器（中国）有限公司 | Statistical information re-sampling device |
| CN106649205B (en) * | 2016-10-18 | 2019-08-23 | 一诺仪器（中国）有限公司 | The resampling device of statistical information |
| CN106980102A (en) * | 2017-05-19 | 2017-07-25 | 中国电力科学研究院 | The device for monitoring running and method of a kind of electric energy meter field detection device |
| CN110989439A (en) * | 2019-12-05 | 2020-04-10 | 国家电网有限公司 | Power grid equipment data acquisition tool |
| CN114689982A (en) * | 2020-12-25 | 2022-07-01 | 武汉华大电力自动技术有限责任公司 | Real-time monitoring platform for key equipment of power grid |
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Open date: 20091021 |