CN104062625A - Digital electric energy metering device calibration equipment and method thereof - Google Patents
Digital electric energy metering device calibration equipment and method thereof Download PDFInfo
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- CN104062625A CN104062625A CN201410302740.0A CN201410302740A CN104062625A CN 104062625 A CN104062625 A CN 104062625A CN 201410302740 A CN201410302740 A CN 201410302740A CN 104062625 A CN104062625 A CN 104062625A
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Abstract
The invention provides a piece of digital electric energy metering device calibration equipment and a method thereof. The equipment comprises a voltage regulator 1, a phase-shifted power supply 2, a voltage regulator 3, a booster 4, a large current generator 5, an error calculator 9, a piece of clock synchronization equipment 14, a standard electric energy metering module and a digital electric energy metering module. The error calculator 9 is connected with the standard electric energy metering module and the digital electric energy metering module. According to the invention, the comprehensive error of a substation digital electric energy metering device is measured by an overall check mode, and overall tracing of the digital electric energy metering device is realized. By adopting the equipment and the method of the invention, an intelligent substation digital electric energy metering device composed of an electronic transformer, a merging unit and a digital electric meter can be calibrated, and the calibration quantity value can be traced back to the highest grade of national electric energy standards.
Description
Technical field
The invention belongs to a kind of electric power meter correcting device, specifically relate to a kind of digitalized electric energy measuring apparatus correcting device and method thereof.
Background technology
Along with the raising of progress, science and technology and the level of IT application and the becoming increasingly conspicuous of global energy and environmental problem of expanding economy, society, power network development faces new problem and new challenge.The requirement of development intelligent grid, adaptation Sustainable Development in Future, has become the common choice that global various countries respond actively Challenges for Future.Building and adapt to following intelligent grid needs, meet the intelligent substation of intelligent grid demand, has been the important guarantee of intelligent grid construction object.
Intelligent substation is along with the proposition of intelligent grid concept proposes, refer to: adopt equipment and design reliable, economical, integrated, environmental protection, with the information digitalization of entirely standing, communications platform networking, information sharing standardization, system function integration, structural design densification, high-tension apparatus intellectuality and running status visualization technology, be characterized as basic demand, can support electrical network on-line analysis and decision-making, and then improve the transformer station of new generation of whole operation of power networks reliability and economy.
Electric energy metered system is the important component part of transformer station.Intelligent substation digitalized electric energy measuring apparatus is comprised of electronic mutual inductor, merge cells and digitalized electrical energy meter, and great changes have occurred relatively traditional transformer station metering system.At digital transformer substation and intelligent substation first stage of construction, owing to lacking the means of effectively tracing to the source, digitalized electric energy measuring apparatus unanimously cannot become legal measurement instrument, can only be for grid company internal examination, and cannot be for clearing.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of digitalized electric energy measuring apparatus correcting device and method thereof, can calibrate the digitalized electric energy measuring apparatus being formed by electronic mutual inductor, merge cells, digitalized electrical energy meter (or other have the instrument and meter of electric energy metrical function), meanwhile, calibration value can be traceable to the highest electric energy standard of country.Calibration and the problem of tracing to the source of intelligent substation digitalized electric energy measuring apparatus have been solved.
The object of the invention is to adopt following technical proposals to realize:
A kind of digitalized electric energy measuring apparatus correcting device, its improvements are, described equipment comprises pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5, Error Calculator 9, clock synchronization device 14, standard electric energy metering module and digital electric energy metering module;
Described Error Calculator 9 is connected with digital electric energy metering module with standard electric energy metering module respectively.
Preferably, described standard electric energy metering module comprises standard current transformer 6, standard potential transformer 7 and standard electric energy meter 8;
Described digital electric energy metering module comprises electronic current mutual inductor 10, electronic type voltage transformer 11, merge cells 12 and digitalized electrical energy meter 13;
Described Error Calculator 9 is connected with standard electric energy metering module, pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5;
Described Error Calculator 9 is connected with digital electric energy metering module, pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5;
Described merge cells 12 is connected with clock synchronization device 14.
Further, described pressure regulator 1, stepup transformer 4, standard potential transformer 6, standard electric energy meter 8 and Error Calculator 9 are connected successively;
Described phase shift power supply 2, pressure regulator 3, current lifting device 5, standard current transformer 7, standard electric energy meter 8 and Error Calculator 9 are connected successively;
Described pressure regulator 1, stepup transformer 4, electronic type voltage transformer 10, merge cells 12, digitalized electrical energy meter 13 and Error Calculator 9 are connected successively;
Described phase shift power supply 2, pressure regulator 3, current lifting device 5, standard current transformer 7, electronic current mutual inductor 11, merge cells 12, digitalized electrical energy meter 13 and Error Calculator 9 are connected successively;
Described merge cells 12 is connected with clock synchronization device 14.
Further, described pressure regulator 1 is by stepup transformer 4 access standard potential transformer 6 in parallel and electronic type voltage transformer 7.
Further, described phase shift power supply 2 is through pressure regulator 3 and current lifting device 5 series connection access standard current transformer 7 and electronic current mutual inductors 11.
Preferably, described booster voltage output area is 0-220kV.
Preferably, described current lifting device electric current output area is 0.1A-2000A.
The present invention is based on a kind of digitalized electric energy measuring apparatus calibration steps that another object provides, its improvements are, described method comprises
(1) pressure regulator 1 and phase shift power supply 2 are got civil power and are produced two-way voltage signal;
(2) voltage that pressure regulator 1 produces produces road high voltage signal access in parallel standard potential transformer 6 and an electronic type voltage transformer 7 by stepup transformer 4;
(3) voltage signal that phase shift power supply 2 produces is through current signal series connection access standard current transformer 7 and the electronic current mutual inductor 11 of pressure regulator 3 and current lifting device generation;
(4) output signal of standard potential transformer 6 and standard current transformer inflow standard electric energy meter 8 is measured;
(5) output signal of electronic type voltage transformer 10 and electronic current mutual inductor 11 access merge cells 12;
(6) clock synchronization device 14 is combined unit and carries out synchronously;
(7) merge cells 12 output signal input digitalized electrical energy meters 13;
(8) the high-frequency electrical energy pulse output signals error originated from input counter 9 of the output of the electrical energy pulse of digitalized electrical energy meter 13 and standard electric energy meter 8;
(9) Error Calculator records error and is test result.
Preferably, between described stepup transformer and current lifting device, by phase shift power supply, carry out phase adjusted.
Preferably, the high-voltage great-current signal that described stepup transformer and current lifting device produce becomes the little current signal input of low pressure standard electric energy meter through standard mutual inductor and measures.
Compared with the prior art, beneficial effect of the present invention is:
The present invention utilizes the mode of whole verification to measure the composition error of transformer station's digitalized electric energy measuring apparatus, has realized the integral body of digitalized electric energy measuring apparatus and has traced to the source.
The intelligent substation digitalized electric energy measuring apparatus of utilizing the present invention to calibrate to be comprised of electronic mutual inductor, merge cells, digitalized electrical energy meter, calibration value can be traceable to the highest electric energy standard of country.
Standard potential transformer of the present invention accurately carries out ratio by high voltage to be dwindled, and is convenient to measure, and no-load voltage ratio accuracy is less than 1 * 10
-4.
Standard current transformer of the present invention accurately carries out ratio by large electric current to be dwindled, and is convenient to measure, and no-load voltage ratio accuracy is less than 1 * 10
-4.
Standard electric energy meter of the present invention is pin-point accuracy standard electric energy meter, and accuracy of measurement is less than 1 * 10
-4.
Accompanying drawing explanation
Fig. 1 is a kind of digitalized electric energy measuring apparatus correcting device principle assumption diagram provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Digitalized electric energy measuring apparatus correcting device and a method thereof, it provides a kind of method of calibrating intelligent substation digitalized electric energy measuring apparatus composition error.The present invention is comprised of pressure regulator, phase shift power supply, standard potential transformer, standard current transformer, standard electric energy meter, Error Calculator and a set of digitalized electric energy measuring apparatus.
Phase shift power supply carries out phase shift by the voltage of voltage circuit pressure regulator and current return pressure regulator, according to test point phase place, produce the alternating voltage of two-phase out of phase, voltage circuit input voltage is inputted respectively electronic type voltage transformer PTx and the standard potential transformer PTn of digitalized electric energy measuring apparatus by pressure regulator and high voltage of stepup transformer output; Current return input voltage exports once by pressure regulator and current lifting device electronic current mutual inductor CTx and the standard current transformer CTn that large electric current is inputted respectively digitalized electric energy measuring apparatus.
Electronic current mutual inductor CTx, electronic type voltage transformer PTx, merge cells and digitalized electrical energy meter form digital electric power meter.For digital output type electric mutual inductor, electronic current (voltage) mutual inductor changes into digital signal by primary current (voltage) signal and delivers to merge cells by optical fiber transmission, and merge cells carries out interpolation by the digital sample value signal of voltage transformer (VT), current transformer input and synchronously packs.For simulation output type electronic mutual inductor, electronic current (voltage) mutual inductor changes into the weak voltage signal of secondary by primary current (voltage) signal and is connected to merge cells by shielded cable, and merge cells carries out synchronized sampling by the weak signal of input.Merge cells according to IEC61850-9-2 standard, is assembled into digitized current and voltage signals digital frame and sends to digitalized electrical energy meter.Digitalized electrical energy meter extracts each phase current voltage signal and calculates energy information from digital frame, sends low-frequency electrical energy pulse simultaneously.
By traditional standard current transformer, voltage transformer (VT) and standard electric energy meter, form standard electric power meter on the other hand.The secondary singal of traditional standard electric energy meter direct measurement standard Current Transmit n and standard potential transformer PTn output obtains standard electric energy, sends high-frequency electrical energy pulse simultaneously.The high-frequency impulse that the low-frequency pulse that digitalized electrical energy meter sends and standard electric energy meter send is error originated from input counter simultaneously, Error Calculator is according to the meter constant of standard electric energy meter and measured number electric energy meter, respectively input low-frequency pulse and high-frequency impulse are converted into the electric energy value of response, then electric energy value is carried out to error calculating, thereby obtain the whole error in dipping of digitalized electric energy measuring apparatus.
The intelligent substation digitalized electric energy measuring apparatus that the present invention can piece calibration be comprised of electronic mutual inductor, merge cells, digitalized electrical energy meter, calibration range (0～220kV, 0.1A～2000A), calibration uncertainty 0.05% (k=2).Calibration result can be traceable to national standard.
Embodiment
A kind of digitalized electric energy measuring apparatus of the present invention correcting device, comprises pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5, standard potential transformer 6, standard current transformer 7, standard electric energy meter 8, Error Calculator 9, electronic type voltage transformer 10, electronic current mutual inductor 11, merge cells 12, digitalized electrical energy meter 13, clock synchronization device 14.
Wherein, pressure regulator 1 and phase shift power supply 2 are got the two-way voltage signal with certain phase angle that civil power produces, and the voltage that pressure regulator 1 produces requires to produce road high voltage signal access in parallel standard potential transformer 6 and an electronic type voltage transformer 7 by stepup transformer 4 according to test point;
The voltage signal that phase shift power supply 2 produces produces through pressure regulator 3 and current lifting device large current signal series connection access standard current transformer 7 and the electronic current mutual inductor 11 that meets test point requirement;
The output current signal of standard potential transformer 6 and standard potential transformer flows into standard electric energy meter 8 and measures;
The output signal access merge cells 12 of electronic type voltage transformer 10 and electronic current mutual inductor 11;
Clock synchronization device 14 is combined unit to carry out synchronously;
Merge cells 12 output input signal input digitalized electrical energy meters 13;
The electrical energy pulse output of digitalized electrical energy meter 13 and the high-frequency electrical energy pulse output signals error originated from input counter 9 of standard electric energy meter 8, Error Calculator records error and is test result.
The digitized measurement device is calibrated as a whole, directly recorded the composition error of package unit.
Between stepup transformer and current lifting device, by phase shift power supply, carry out phase adjusted.
The high-voltage great-current signal that stepup transformer and current lifting device produce becomes the little current signal input of low pressure standard electric energy meter through standard mutual inductor and measures.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. a digitalized electric energy measuring apparatus correcting device, it is characterized in that, described equipment comprises pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5, Error Calculator 9, clock synchronization device 14, standard electric energy metering module and digital electric energy metering module;
Described Error Calculator 9 is connected with digital electric energy metering module with standard electric energy metering module respectively.
2. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 1, is characterized in that, described standard electric energy metering module comprises standard current transformer 6, standard potential transformer 7 and standard electric energy meter 8;
Described digital electric energy metering module comprises electronic current mutual inductor 10, electronic type voltage transformer 11, merge cells 12 and digitalized electrical energy meter 13;
Described Error Calculator 9 is connected with standard electric energy metering module, pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5;
Described Error Calculator 9 is connected with digital electric energy metering module, pressure regulator 1, phase shift power supply 2, pressure regulator 3, stepup transformer 4, current lifting device 5;
Described merge cells 12 is connected with clock synchronization device 14.
3. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 2, is characterized in that, described pressure regulator 1, stepup transformer 4, standard potential transformer 6, standard electric energy meter 8 and Error Calculator 9 are connected successively;
Described phase shift power supply 2, pressure regulator 3, current lifting device 5, standard current transformer 7, standard electric energy meter 8 and Error Calculator 9 are connected successively;
Described pressure regulator 1, stepup transformer 4, electronic type voltage transformer 10, merge cells 12, digitalized electrical energy meter 13 and Error Calculator 9 are connected successively;
Described phase shift power supply 2, pressure regulator 3, current lifting device 5, standard current transformer 7, electronic current mutual inductor 11, merge cells 12, digitalized electrical energy meter 13 and Error Calculator 9 are connected successively;
Described merge cells 12 is connected with clock synchronization device 14.
4. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 2, is characterized in that, described pressure regulator 1 is by stepup transformer 4 access standard potential transformer 6 in parallel and electronic type voltage transformer 7.
5. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 2, is characterized in that, described phase shift power supply 2 is through pressure regulator 3 and current lifting device 5 series connection access standard current transformer 7 and electronic current mutual inductors 11.
6. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 1, is characterized in that, described booster voltage output area is 0-220kV.
7. a kind of digitalized electric energy measuring apparatus correcting device as claimed in claim 1, is characterized in that, described current lifting device electric current output area is 0.1A-2000A.
8. a digitalized electric energy measuring apparatus calibration steps, is characterized in that, described method comprises
(1) pressure regulator 1 and phase shift power supply 2 are got civil power and are produced two-way voltage signal;
(2) voltage that pressure regulator 1 produces produces road high voltage signal access in parallel standard potential transformer 6 and an electronic type voltage transformer 7 by stepup transformer 4;
(3) voltage signal that phase shift power supply 2 produces is through current signal series connection access standard current transformer 7 and the electronic current mutual inductor 11 of pressure regulator 3 and current lifting device generation;
(4) output signal of standard potential transformer 6 and standard current transformer inflow standard electric energy meter 8 is measured;
(5) output signal of electronic type voltage transformer 10 and electronic current mutual inductor 11 access merge cells 12;
(6) clock synchronization device 14 is combined unit and carries out synchronously;
(7) merge cells 12 output signal input digitalized electrical energy meters 13;
(8) the high-frequency electrical energy pulse output signals error originated from input counter 9 of the output of the electrical energy pulse of digitalized electrical energy meter 13 and standard electric energy meter 8;
(9) Error Calculator records error and is test result.
9. a kind of digitalized electric energy measuring apparatus calibration steps as claimed in claim 8, is characterized in that, between described stepup transformer and current lifting device, by phase shift power supply, carries out phase adjusted.
10. a kind of digitalized electric energy measuring apparatus calibration steps as claimed in claim 8, is characterized in that, the high-voltage great-current signal that described stepup transformer and current lifting device produce becomes the little current signal input of low pressure standard electric energy meter through standard mutual inductor and measures.
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Cited By (16)
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| CN104502882A (en) * | 2014-12-08 | 2015-04-08 | 国网四川省电力公司电力科学研究院 | Standard device for tracing 10kV-35kV high voltage electric energy value |
| CN104698418A (en) * | 2015-03-24 | 2015-06-10 | 东营市双益电气有限责任公司 | Overall calibration method of measuring system of transformer test station |
| CN105372613A (en) * | 2015-12-01 | 2016-03-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method of automatic zero setting and zero detection for verification of current transformer on the basis of current comparator |
| CN105467352A (en) * | 2015-07-13 | 2016-04-06 | 国家电网公司 | Intelligent substation secondary side electric energy metering system detection method |
| CN105487043A (en) * | 2016-01-28 | 2016-04-13 | 云南电网有限责任公司电力科学研究院 | Metering accuracy simulation test system of digital electric energy meter |
| CN105954705A (en) * | 2016-07-06 | 2016-09-21 | 国网上海市电力公司 | Digital electric energy measuring equipment remote calibration system and method |
| CN105954700A (en) * | 2016-05-03 | 2016-09-21 | 中国电力科学研究院 | Electronic mutual inductor temperature characteristic test system and test method |
| CN106199489A (en) * | 2016-07-06 | 2016-12-07 | 国网上海市电力公司 | Laboratory reproduction type digitalized electric energy measuring equipment remote calibration system and method |
| CN106526526A (en) * | 2016-12-08 | 2017-03-22 | 国网四川省电力公司电力科学研究院 | Test device for digital metering system |
| CN107219492A (en) * | 2017-04-24 | 2017-09-29 | 国网浙江省电力公司电力科学研究院 | Medium voltage network electric energy metrical high pressure integration semi-physical simulation device |
| CN107329104A (en) * | 2017-07-10 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor magnitude tracing method and system of meter and composition error |
| CN107748348A (en) * | 2017-11-30 | 2018-03-02 | 国网安徽省电力公司淮南供电公司 | The high-voltage electric energy meter calibrating installation that can integrally trace to the source |
| CN108132455A (en) * | 2017-12-19 | 2018-06-08 | 国网重庆市电力公司电力科学研究院 | Global error check system based on combining unit |
| CN110736957A (en) * | 2019-12-12 | 2020-01-31 | 国网江西省电力有限公司电力科学研究院 | Online detection system and method for electric energy metering device based on clock synchronization |
| CN111487576A (en) * | 2020-04-30 | 2020-08-04 | 浙江省方正校准有限公司 | Miniature current transformer measuring device based on direct measurement method |
| CN112834979A (en) * | 2021-03-30 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Error comparison system and method for high-voltage electric energy metering device under simulated working condition |
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| CN104502882A (en) * | 2014-12-08 | 2015-04-08 | 国网四川省电力公司电力科学研究院 | Standard device for tracing 10kV-35kV high voltage electric energy value |
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| CN105467352A (en) * | 2015-07-13 | 2016-04-06 | 国家电网公司 | Intelligent substation secondary side electric energy metering system detection method |
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| CN105487043A (en) * | 2016-01-28 | 2016-04-13 | 云南电网有限责任公司电力科学研究院 | Metering accuracy simulation test system of digital electric energy meter |
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| CN105954705A (en) * | 2016-07-06 | 2016-09-21 | 国网上海市电力公司 | Digital electric energy measuring equipment remote calibration system and method |
| CN106199489A (en) * | 2016-07-06 | 2016-12-07 | 国网上海市电力公司 | Laboratory reproduction type digitalized electric energy measuring equipment remote calibration system and method |
| CN106526526A (en) * | 2016-12-08 | 2017-03-22 | 国网四川省电力公司电力科学研究院 | Test device for digital metering system |
| CN107219492A (en) * | 2017-04-24 | 2017-09-29 | 国网浙江省电力公司电力科学研究院 | Medium voltage network electric energy metrical high pressure integration semi-physical simulation device |
| CN107329104A (en) * | 2017-07-10 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor magnitude tracing method and system of meter and composition error |
| CN107748348A (en) * | 2017-11-30 | 2018-03-02 | 国网安徽省电力公司淮南供电公司 | The high-voltage electric energy meter calibrating installation that can integrally trace to the source |
| CN108132455A (en) * | 2017-12-19 | 2018-06-08 | 国网重庆市电力公司电力科学研究院 | Global error check system based on combining unit |
| CN110736957A (en) * | 2019-12-12 | 2020-01-31 | 国网江西省电力有限公司电力科学研究院 | Online detection system and method for electric energy metering device based on clock synchronization |
| CN111487576A (en) * | 2020-04-30 | 2020-08-04 | 浙江省方正校准有限公司 | Miniature current transformer measuring device based on direct measurement method |
| CN112834979A (en) * | 2021-03-30 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Error comparison system and method for high-voltage electric energy metering device under simulated working condition |
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