CN104198980A - Accuracy evaluation system for digital electric energy meter - Google Patents

Accuracy evaluation system for digital electric energy meter Download PDF

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Publication number
CN104198980A
CN104198980A CN201410437426.3A CN201410437426A CN104198980A CN 104198980 A CN104198980 A CN 104198980A CN 201410437426 A CN201410437426 A CN 201410437426A CN 104198980 A CN104198980 A CN 104198980A
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CN
China
Prior art keywords
energy meter
electrical energy
digitalized electrical
electric energy
digitalized
Prior art date
Application number
CN201410437426.3A
Other languages
Chinese (zh)
Inventor
白静芬
林繁涛
王晔
刘佳
陈松方
宋晓卉
卢达
赵莎
章欣
徐英辉
杨湘江
Original Assignee
国家电网公司
中国电力科学研究院
北京智网创能科技有限公司
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Application filed by 国家电网公司, 中国电力科学研究院, 北京智网创能科技有限公司 filed Critical 国家电网公司
Priority to CN201410437426.3A priority Critical patent/CN104198980A/en
Publication of CN104198980A publication Critical patent/CN104198980A/en

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Abstract

The invention provides an accuracy evaluation system for a digital electric energy meter. The system comprises an analogue standard source, an analogue standard electric energy meter, a digital electric energy meter calibrator and a control computer, wherein the control computer is connected with the analogue standard source and the digital electric energy meter calibrator, the analogue standard source is connected with the digital electric energy meter through the digital electric energy meter calibrator, and connected with the analogue standard meter simultaneously; the voltage range output by the analogue standard source is 0-480V, and the current range is 0-100A. The invention provides an accuracy evaluation system for a digital electric energy meter, which solves the problem that the present electric energy meter test device is incapable of testing or accurately testing the reliability and working stability of data reception of the digital electric energy meter.

Description

A kind of digitalized electrical energy meter accuracy evaluation system
Technical field
The present invention relates to a kind of evaluating system, be specifically related to a kind of digitalized electrical energy meter accuracy evaluation system.
Background technology
Along with the technology such as electronic mutual inductor, intelligent primary equipment and microelectric technique reach its maturity, intelligent substation or digital transformer substation have become a kind of trend of development.In digital transformer substation, electric energy meter and mutual inductor have not reconstructed electric loop, but optical cable connects electronic type voltage current transformer, intelligent primary equipment etc. so that transmitting digitized signal.Digitalized electrical energy meter and merge cells or electronic mutual inductor have substantially adopted the optical-fibre communications mode of high reliability.Digitalized electrical energy meter will be intelligent substation electric energy metrical visual plant, so the demand of the electric energy meter of digital transformer substation also can be increasing.
There is the change of essence in the interface mode of digitalized electrical energy meter and principle of work, it is input as the Frame of ethernet type compared with traditional electric energy meter, and in the situation that transmission system bandwidth is enough, the metering of electric energy meter active energy does not have error in theory.But in fact digitalized electrical energy meter is subject to processing the factor impacts such as device word length, system clock, and error certainly exists, and it is less that only the precision stability of digitalized electrical energy meter is higher, temperature is floated impact.But digital electricity meter is except fundamental error, can whether digital interface part also has a lot of sundry items to need to detect, as reliable in received data, when digital port suffers network storm, normally work, when numeral message is abnormal, can electric energy meter normally work, agreement compliance test etc.For these problems, original electric energy meter testing apparatus has not too been applicable to digitalized electrical energy meter, force the electric energy metrical of intelligent station still to adopt traditional measuring apparatus, this does not only meet relevant electric energy metrical and closes the regulation of stomion, and the digitizing process of intelligent station is had a greatly reduced quality.Therefore, be necessary to study a kind of new electric energy meter degree of accuracy assessment apparatus and solve digitalized electrical energy meter and test these problems that face, meet the test request to digitalized electrical energy meter.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of digitalized electrical energy meter accuracy evaluation system, solved current electric energy meter testing apparatus and cannot test or accurately test out the reception data reliability of digitalized electrical energy meter, the problem of job stability.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of digitalized electrical energy meter accuracy evaluation system, described system comprises mock standard source, mock standard electric energy meter, digitalized electrical energy meter tester and controls computing machine; Described control computing machine connecting analog standard source and digitalized electrical energy meter tester, described mock standard source connects digitalized electrical energy meter by digitalized electrical energy meter tester, is connected with mock standard table simultaneously.
Described control computing machine connects described digitalized electrical energy meter tester by Ethernet.
Described control computing machine, by gpib bus connecting analog standard source, makes mock standard source require output voltage signal and current signal according to test point is set.
Described mock standard source output voltage signal and current signal are divided into two-way, voltage circuit and the current return of a road input mock standard electric energy meter, and voltage circuit and the current return of described digitalized electrical energy meter tester inputted on another road.
Described mock standard electric energy meter is measured electric energy by voltage signal and current signal, and the electric energy of measurement is converted to high-frequency electrical energy pulse, inputs to the error calculating module of described digitalized electrical energy meter tester.
Described digitalized electrical energy meter tester comprises A/D sampling module, stipulations modular converter and error calculating module; Voltage signal and current signal are converted to digital signal by described A/D sampling module, and described digital signal produces sampling value message by stipulations modular converter, and described sampling value message is by optical fiber network interface input digitalized electrical energy meter.
Described sampling value message meets IEC61850-9-2 regulation, and is less than 1us the lock in time of sampling value message.
Described digitalized electrical energy meter obtains electric energy according to the sampling value message of input, produces corresponding low-frequency electrical energy pulse simultaneously, and described low-frequency electrical energy pulse inputs to the error calculating module of described digitalized electrical energy meter tester.
Described error calculating module compares the high-frequency electrical energy pulse of input and low energy electrical energy pulse, draws the electric energy measurement error of digitalized electrical energy meter, completes the Accuracy evaluation of digitalized electrical energy meter.
The frame losing of described digitalized electrical energy meter tester analog sampling simultaneously value message and the abnormality such as asynchronous, detect the accuracy of digitalized electrical energy meter under abnormality.
The voltage range of described mock standard source output is 0~480V, and range of current is 0~100A, and the class of accuracy of described mock standard electric energy meter is 0.01 grade; Described digital electricity meter tester sampling accuracy is less than 0.03%.
Compared with prior art, beneficial effect of the present invention is:
Digitalized electrical energy meter accuracy evaluation system provided by the invention, can be widely used in intelligent substation electric energy measuring equipment, realized digitalized electric energy to the tracing to the source of simulation electric energy, and can be used for the Laboratory Evaluation of digitalized electrical energy meter accuracy, also can on-the-spot test; In addition except the precision to electric energy meter is tested, the abnormality such as digital electric energy meter tester simultaneously can also analog message frame losing, network storm, detect the accuracy of digitalized electrical energy meter under abnormality.
Brief description of the drawings
Fig. 1 is digitalized electrical energy meter accuracy evaluation system structured flowchart.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, the invention provides a kind of digitalized electrical energy meter accuracy evaluation system, described system comprises mock standard source, mock standard electric energy meter, digitalized electrical energy meter tester and controls computing machine; Described control computing machine connecting analog standard source and digitalized electrical energy meter tester, described mock standard source connects digitalized electrical energy meter by digitalized electrical energy meter tester, is connected with mock standard table simultaneously; The voltage range of described mock standard source output is 0~480V, and range of current is 0~100A.
Described control computing machine connects described digitalized electrical energy meter tester by Ethernet.
Described control computing machine, by gpib bus connecting analog standard source, makes mock standard source require output voltage signal and current signal according to test point is set.
Described mock standard source output voltage signal and current signal are divided into two-way, voltage circuit and the current return of a road input mock standard electric energy meter, and voltage circuit and the current return of described digitalized electrical energy meter tester inputted on another road.
Described mock standard electric energy meter is measured electric energy by voltage signal and current signal, and the electric energy of measurement is converted to high-frequency electrical energy pulse, inputs to the error calculating module of described digitalized electrical energy meter tester.
Described digitalized electrical energy meter tester comprises A/D sampling module, stipulations modular converter and error calculating module; Voltage signal and current signal are converted to digital signal by described A/D sampling module, and described digital signal produces sampling value message by stipulations modular converter, and described sampling value message is by optical fiber network interface input digitalized electrical energy meter.
Described sampling value message meets IEC61850-9-2 regulation, and is less than 1us the lock in time of sampling value message.
Described digitalized electrical energy meter obtains electric energy according to the sampling value message of input, produces corresponding low-frequency electrical energy pulse simultaneously, and described low-frequency electrical energy pulse inputs to the error calculating module of described digitalized electrical energy meter tester.
Described error calculating module compares the high-frequency electrical energy pulse of input and low energy electrical energy pulse, draws the electric energy measurement error of digitalized electrical energy meter, completes the Accuracy evaluation of digitalized electrical energy meter.Error is little, shows that digitalized electrical energy meter accuracy is higher.
The frame losing of described digitalized electrical energy meter tester analog sampling simultaneously value message and the abnormality such as asynchronous, detect the accuracy of digitalized electrical energy meter under abnormality.
The class of accuracy of described mock standard electric energy meter is 0.01 grade; Described digital electricity meter tester sampling accuracy is less than 0.03%.
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; those of ordinary skill in the field still can modify or be equal to replacement the specific embodiment of the present invention with reference to above-described embodiment; these do not depart from any amendment of spirit and scope of the invention or are equal to replacement, within the claim protection domain of the present invention all awaiting the reply in application.

Claims (11)

1. a digitalized electrical energy meter accuracy evaluation system, is characterized in that: described system comprises mock standard source, mock standard electric energy meter, digitalized electrical energy meter tester and controls computing machine; Described control computing machine connecting analog standard source and digitalized electrical energy meter tester, described mock standard source connects digitalized electrical energy meter by digitalized electrical energy meter tester, is connected with mock standard table simultaneously.
2. digitalized electrical energy meter accuracy evaluation system according to claim 1, is characterized in that: described control computing machine connects described digitalized electrical energy meter tester by Ethernet.
3. digitalized electrical energy meter accuracy evaluation system according to claim 1, is characterized in that: described control computing machine, by gpib bus connecting analog standard source, makes mock standard source require output voltage signal and current signal according to test point is set.
4. digitalized electrical energy meter accuracy evaluation system according to claim 1, it is characterized in that: described mock standard source output voltage signal and current signal are divided into two-way, voltage circuit and the current return of one tunnel input mock standard electric energy meter, voltage circuit and the current return of described digitalized electrical energy meter tester inputted on another road.
5. digitalized electrical energy meter accuracy evaluation system according to claim 1, it is characterized in that: described mock standard electric energy meter is measured electric energy by voltage signal and current signal, and the electric energy of measurement is converted to high-frequency electrical energy pulse, input to the error calculating module of described digitalized electrical energy meter tester.
6. digitalized electrical energy meter accuracy evaluation system according to claim 5, is characterized in that: described digitalized electrical energy meter tester comprises A/D sampling module, stipulations modular converter and error calculating module; Voltage signal and current signal are converted to digital signal by described A/D sampling module, and described digital signal produces sampling value message by stipulations modular converter, and described sampling value message is by optical fiber network interface input digitalized electrical energy meter.
7. digitalized electrical energy meter accuracy evaluation system according to claim 6, is characterized in that: described sampling value message meets IEC61850-9-2 regulation, and is less than 1us the lock in time of sampling value message.
8. digitalized electrical energy meter accuracy evaluation system according to claim 6, it is characterized in that: described digitalized electrical energy meter obtains electric energy according to the sampling value message of input, produce corresponding low-frequency electrical energy pulse, described low-frequency electrical energy pulse inputs to the error calculating module of described digitalized electrical energy meter tester simultaneously.
9. digitalized electrical energy meter accuracy evaluation system according to claim 8, it is characterized in that: described error calculating module compares the high-frequency electrical energy pulse of input and low energy electrical energy pulse, draw the electric energy measurement error of digitalized electrical energy meter, complete the Accuracy evaluation of digitalized electrical energy meter.
10. digitalized electrical energy meter accuracy evaluation system according to claim 6, it is characterized in that: the frame losing of described digitalized electrical energy meter tester analog sampling simultaneously value message and the abnormality such as asynchronous, detect the accuracy of digitalized electrical energy meter under abnormality.
11. according to the digitalized electrical energy meter accuracy evaluation system described in claim 1 or 4, it is characterized in that: the voltage range of described mock standard source output is 0~480V, and range of current is 0~100A; The class of accuracy of described mock standard electric energy meter is 0.01 grade; Described digital electricity meter tester sampling accuracy is less than 0.03%.
CN201410437426.3A 2014-08-29 2014-08-29 Accuracy evaluation system for digital electric energy meter CN104198980A (en)

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
CN104991221A (en) * 2015-07-07 2015-10-21 国家电网公司 Device and detection method for calibrating metering device in distributed substation
CN105203980A (en) * 2015-09-14 2015-12-30 广西电网有限责任公司电力科学研究院 Electric energy quality self-inspection system and self-inspection method thereof
CN105548947A (en) * 2016-01-28 2016-05-04 云南电网有限责任公司电力科学研究院 Method and system of synchronization traceability of digitalization electric energy meter
CN105717476A (en) * 2016-01-28 2016-06-29 云南电网有限责任公司电力科学研究院 Test method and system for digital electric energy meter
CN105911495A (en) * 2016-04-12 2016-08-31 国网江苏省电力公司电力科学研究院 Analog standard source with IEC61850 digital interface and testing method thereof
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
CN106383330A (en) * 2016-10-08 2017-02-08 清华大学 Digital electric energy metering algorithm test platform
CN106443563A (en) * 2016-11-01 2017-02-22 国网江西省电力公司电力科学研究院 Field environment based integrated calibrating and analytic device of digital electric energy meter
CN107885097A (en) * 2017-10-24 2018-04-06 中广核核电运营有限公司 A kind of Nuclear Power Plant Simulation I&C system DCS transformations closed loop checking system and method
CN107894761A (en) * 2017-11-07 2018-04-10 广东核电合营有限公司 The method of testing and platform of Nuclear Power Plant Simulation I&C system digital improvement
CN109725281A (en) * 2019-01-18 2019-05-07 国网江苏省电力有限公司电力科学研究院 A kind of long-range source tracing method of digitalized electrical energy meter based on quantum techniques and system
CN110045267A (en) * 2019-05-05 2019-07-23 珠海国测电能仪表科技有限公司 A kind of intelligence multi-loop electric minor guide rail meter route board detecting method and detection device

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CN103064053A (en) * 2012-12-14 2013-04-24 中国电力科学研究院 Online calibration device of digital quantity input type electric energy meter
CN104007410A (en) * 2014-06-12 2014-08-27 国家电网公司 Digital electric energy meter verifying device

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CN101900799A (en) * 2009-09-30 2010-12-01 广东电网公司电力科学研究院 Digital electric energy meter checking device based on analog source tracing method
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CN104991221B (en) * 2015-07-07 2018-01-30 国家电网公司 The device and detection method calibrated to the metering device in distributed transformer substation
CN104991221A (en) * 2015-07-07 2015-10-21 国家电网公司 Device and detection method for calibrating metering device in distributed substation
CN105203980A (en) * 2015-09-14 2015-12-30 广西电网有限责任公司电力科学研究院 Electric energy quality self-inspection system and self-inspection method thereof
CN105203980B (en) * 2015-09-14 2018-08-24 广西电网有限责任公司电力科学研究院 A kind of power quality self-checking system and its self checking method
CN105717476A (en) * 2016-01-28 2016-06-29 云南电网有限责任公司电力科学研究院 Test method and system for digital electric energy meter
CN105548947B (en) * 2016-01-28 2019-02-26 云南电网有限责任公司电力科学研究院 A kind of synchronous source tracing method of digitalized electrical energy meter and system
CN105717476B (en) * 2016-01-28 2018-03-30 云南电网有限责任公司电力科学研究院 The method of testing and system of a kind of digital electric energy meter
CN105548947A (en) * 2016-01-28 2016-05-04 云南电网有限责任公司电力科学研究院 Method and system of synchronization traceability of digitalization electric energy meter
CN105911495A (en) * 2016-04-12 2016-08-31 国网江苏省电力公司电力科学研究院 Analog standard source with IEC61850 digital interface and testing method thereof
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
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
CN106383330A (en) * 2016-10-08 2017-02-08 清华大学 Digital electric energy metering algorithm test platform
CN106383330B (en) * 2016-10-08 2019-05-28 清华大学 Digitalized electric energy measures test of heuristics platform
CN106443563A (en) * 2016-11-01 2017-02-22 国网江西省电力公司电力科学研究院 Field environment based integrated calibrating and analytic device of digital electric energy meter
CN107885097A (en) * 2017-10-24 2018-04-06 中广核核电运营有限公司 A kind of Nuclear Power Plant Simulation I&C system DCS transformations closed loop checking system and method
CN107894761A (en) * 2017-11-07 2018-04-10 广东核电合营有限公司 The method of testing and platform of Nuclear Power Plant Simulation I&C system digital improvement
CN109725281A (en) * 2019-01-18 2019-05-07 国网江苏省电力有限公司电力科学研究院 A kind of long-range source tracing method of digitalized electrical energy meter based on quantum techniques and system
CN110045267A (en) * 2019-05-05 2019-07-23 珠海国测电能仪表科技有限公司 A kind of intelligence multi-loop electric minor guide rail meter route board detecting method and detection device

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