CN201569736U - Watt-hour meter calibration device - Google Patents

Watt-hour meter calibration device Download PDF

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Publication number
CN201569736U
CN201569736U CN2009202780619U CN200920278061U CN201569736U CN 201569736 U CN201569736 U CN 201569736U CN 2009202780619 U CN2009202780619 U CN 2009202780619U CN 200920278061 U CN200920278061 U CN 200920278061U CN 201569736 U CN201569736 U CN 201569736U
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CN
China
Prior art keywords
electric energy
energy meter
voltage
precision
power source
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CN2009202780619U
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Chinese (zh)
Inventor
章欣
曾海鸥
杨湘江
闫华光
于海波
范滢
蒋利民
赵莎
杨林
王丽莎
杨晓科
殷昌华
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中国电力科学研究院
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Priority to CN2009202780619U priority Critical patent/CN201569736U/en
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Publication of CN201569736U publication Critical patent/CN201569736U/en

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Abstract

The utility model provides a digital input watt-hour meter calibration device which solves the calibration problem of a novel digital input watt-hour meter. The device comprises an analog power source, a high-precision PT and a high-precision CT, a high-precision digital voltmeter, an AD sampling module, a protocol generation module, a management module, an analog standard meter, a tested watt-hour meter, an error computer and a control computer; the control computer controls the analog power source to output analog voltage and current signals, one circuit of analog signal is measured by the analog standard meter, and is used for calculating the error from the tested meter; and the other circuit of analog signal is converted by the high-precision PT and CT, processed by the AD sampling module and the protocol generation module, and generates measurement data which meets the IEC61850 standard; the data is transmitted to the tested meter through an optical fiber or an unshielded twisted pair, the tested meter receives and analyzes a data frame and calculates the electricity quantity, outputs the electricity quantity pulse, and is used for calculating the error from the analog standard meter. The watt-hour meter calibration device can calibrate the indoor installation digital input multi-functional watt-hour meter which follows DL/T860-9-1/2 and IEC61850-9-1/2LE protocols, and the calibration results can be traced to national standards.

Description

A kind of electric energy meter calibrating installation

Technical field

The utility model belongs to electrotechnical instrument and meter industry electric energy meter calibration system, relates to technical fields such as electric automatization measurement, electric energy metrical, computing machine communication, relates more specifically to a kind of digital quantity input type electric energy meter calibrating installation.

Background technology

Along with application and popularization based on the digital transformer substation automated system of DL/T 860 (IEC61850) standard, bigger change has taken place in the information interaction between transformer station's process layer equipment and the bay device.The application of process layer electronic mutual inductor, intelligent primary equipment makes digital quantity input type electric energy meter become the visual plant of digital transformer substation electric energy metrical.Traditional electronic type and induction type electric energy meter are the analog quantity input type electric energy meter, by more high-grade analog quantity input type standard electric energy meter it are calibrated, and its calibration result can be traceable to national standard.The input signal of digital quantity input type electric energy meter is a digital signal, can't use analog quantity input type standard electric energy meter that it is calibrated.Digital quantity input type electric energy meter belongs to legal system measuring control category as electric power meter, and its calibration result must be traceable to national standard.

Chinese patent application 200610062976.7 discloses a kind of calibration steps and system of electric energy meter, described method comprises the steps: to calibrate control desk to sent basic calibration command frame by the school electric energy meter, to being calibrated initialization by the school electric energy meter, described basic calibration command frame carries by the initialization parameter of school electric energy meter and phase line value; After being finished by school electric energy meter initialization, the calibration control desk is according to the output in calibration steps power controlling source, read the calibration parameter of standard electric energy meter according to the output generation of described power source, to being sent the calibration command frame by the school electric energy meter, described calibration command frame carries described calibration parameter and calibration steps sign; By the school electric energy meter according to the calibration parameter in the described calibration command frame, calibration steps sign, and according to the output of power source produce by school Parameters Calculation error compensation coefficient, carry out calibration operation according to described error compensation coefficient.But electric energy meter calibration steps and system that this patent is introduced can only be applied to traditional electric energy meter, be the analog quantity input type electric energy meter, so it can not solve the calibration problem of digital quantity input type electric energy meter.

The utility model content

For solving the calibration and the problem of tracing to the source of digital quantity input type electric energy meter, the utility model provides a kind of calibration system of digital quantity input type electric energy meter, can calibrate the digital quantity input and follow DL/T860-9-1/2, the indoor installing type digital quantity input type multifunctional electric energy meter of IEC61850-9-1/2LE agreement, simultaneously, the calibration value can be traceable to the highest electric energy standard of country.

For realizing above-mentioned functions, the technical scheme that the utility model adopted is:

A kind of electric energy meter calibrating installation, comprise the simulated power source, high-accuracy voltage mutual inductor PT3, high precision current transformer CT4, high accuracy number voltage table, the AD sampling module, the stipulations generation module, administration module, mock standard table, measured number amount input type electric energy meter, Error Calculator and control computer;

Described control computer is controlled the simulated power source respectively, the mock standard table, high accuracy number voltage table and AD sampling module, the voltage signal that described simulated power source the produces voltage input end that inserts high precision PT and mock standard table in parallel, the current signal series connection that the simulated power source produces inserts the current input terminal of high precision CT and mock standard table, the analog output voltage signal of described high precision PT and high precision CT connects the input end of AD sampling module, and measure respectively by the high accuracy number voltage table, the external trigger lead-out terminal of described AD sampling module is connected with the external trigger input terminal of high accuracy number voltage table, the AD sampling module is connected with the stipulations generation module by internal bus, the input end of the output termination measured number amount input type electric energy meter of described stipulations generation module, measured number amount input type electric energy meter is connected with the mock standard epiphase.

Wherein, described simulated power source, voltage and current signal can be independently adjustable, and wherein voltage output range is 60-100V, and the electric current output area is 0.5-5A.

Wherein, described mock standard table is high-precision power transducer C1-2 and standard voltmeter, is the high-grade surveying instrument that is used for measuring electric power and electric energy.

Wherein, described high precision PT and high precision CT adopt vector synthetic technology and transmission technology certainly to design, and guarantee the precision of conversion, and this device is converted to the small voltage simulating signal of 0-5V with big voltage, current signal, exports to the AD sampling module.

Wherein, described AD sampling module and stipulations generation module, adopt 24 A/D converter, with analog signal conversion is discrete digital signal, discrete digital signal is converted to the data that meet IEC61850 stipulations pattern by the stipulations modular converter, link to each other with the electric energy meter of digital quantity input, this device can link to each other with computer by the gpib bus system, is provided with and the control correlation parameter.

Wherein, described control computer is connected with Error Calculator with simulated power source, mock standard table, high accuracy number voltage table, AD sampling module by gpib bus, the output in control simulated power source and the setting of AD sampling module, read the test data of mock standard table, high accuracy number voltage table, Error Calculator, analytical calculation draws the error of tested electric energy meter.

Wherein, described stipulations generation module is connected with measured number amount input type electric energy meter by optical fiber or twisted-pair feeder.

Wherein, described administration module has optical fiber, twisted-pair feeder RJ45 and three kinds of output interfaces of USB.

The beneficial effects of the utility model are: the accuracy that the utility model can self-correcting AD sampling apparatus, utilize the utility model to calibrate and follow DL/T860-9-1/2, the indoor installing type digital quantity input type multifunctional electric energy meter of IEC61850-9-1/2LE agreement, calibration result can be traceable to national standard.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the principle assumption diagram of digital quantity input type electric energy meter calibrating installation of the present utility model.

Fig. 2 is an AD sampling module principle assumption diagram of the present utility model.

Fig. 3 is a stipulations maker principle assumption diagram of the present utility model.

Fig. 4 is the principle assumption diagram of another embodiment of digital quantity input type electric energy meter calibrating installation of the present utility model;

Wherein, 1-control computer, 2-simulated power source, 3-high precision PT, 4-high precision PT, 5-high accuracy number voltage table, 6-high accuracy number voltage table, the 7-AD sampling module, 8-stipulations generation module, 9-administration module, 10-mock standard table, 11-measured number amount input type electric energy meter, the 12-Error Calculator.

Embodiment

Below in conjunction with accompanying drawing electric energy meter calibrating installation described in the utility model is described in further detail.

Embodiment 1

As shown in Figure 1, the utility model uses control computer 1 control simulated power source 2 output aanalogvoltages, current signal, and this simulating signal is divided into two-way, and a route high precision PT3 and high precision CT4 convert the voltage signal that meets AD sampling module input demand to.Voltage signal after the conversion is monitored by high accuracy number voltage table 5,6, with the calibration transformation result; Another route mock standard table 10 is measured, and is used for that to carry out error ratio right with measured number amount input electric energy meter.The data of the voltage signal of PT, CT output after the high-precision adc sampling are done corresponding processing by the FPGA of this module, according to different mode of operations, FPGA is transferred to original sampling data stipulations generation module 8 or is transferred to control computer 1 through gpib bus by universal serial bus.Stipulations generation module 8 is done secondary treating to the real-time digital data of AD sampling module 7 transmission, generation meets the measurement data of IEC61850 standard, and measurement data generated corresponding Frame according to the frame format of IEC61850-9-1/2 standard definition, by fiber port or the output of RJ45 port.Frame is transferred to measured number amount input type electric energy meter 11 by optical fiber or twisted-pair feeder, and 11 receptions of measured number amount input type electric energy meter, resolution data frame also carry out voltameter and calculate, the output electric pulse.Control computer 1 is calculated the error of mock standard electric energy meter 10 and measured number amount input type electric energy meter 11 by gpib bus departure counter.

Fig. 2 is an AD sampling module principle assumption diagram of the present utility model.Pass through the signal conditioning circuit of sampling module by the voltage signal of prime voltage current transformer (PT, CT) output, mainly be impedance matching and signal attenuation effect, obtain meeting the signal that back level ADC sampling A input channel requires, the ADC chip is done sampling, is quantized to obtain the corresponding digital data input signal.To six road input signals, adopted the ADC chip of six single channel to sample, be used to eliminate crosstalking between the passage, in order to guarantee the synchronized sampling of six road ADC, six road ADC are all by same start trigger signal sampling, and enabling signal is by the DSP output of stipulations generation module.The sampled data of six road ADC chips is transferred to the FPGA of back level respectively by serial communication bus (spi bus) separately, have six tunnel identical modules on the FPGA, receives the sampled data of ADC sampling A transmission synchronously.

Fig. 3 is a stipulations maker principle assumption diagram of the present utility model.Six tunnel sampled datas that FPGA receives through packing after, be transferred to the DSP of stipulations generation module by the parallel communication bus of outside, DSP carries out different processing to the sampled data that receives according to different mode of operations.The one, the normal inspection pattern, under this pattern, DSP proofreaies and correct data, data one tunnel after the correction are through being transferred to the MAC layer of network by internal bus behind the framing, be transferred to networked physics layer equipment (PHY) by the MAC layer by M worker worker bus interface, output to tested table through optic module again.Inner calculation procedure is given on another road, calculates the electric parameter of sampled signal correspondence, and the electric parameter data are transferred to administration module 9 through serial communication interface, by administration module the electric parameter data are shown.The 2nd, test pattern, under this pattern, DSP is transferred to the gpib bus chip to the raw data of sampling by isa bus, by gpib bus original sampling data is transferred to main control computer.

Embodiment 2

Structure and the principle of work of this routine described electric energy meter calibrating installation and embodiment 1 are basic identical, have different being only:

As shown in Figure 4, do not contain Error Calculator 12 in this device, mock standard table 10 directly is connected with measured number amount input electric energy meter 11, and described Error Calculation can directly be calculated by computing machine.

The utility model is described according to specific exemplary embodiment herein.To carry out suitable replacement under the scope of the present utility model or revise will be conspicuous not breaking away to one skilled in the art.Exemplary embodiment only is illustrative, rather than to the restriction of scope of the present utility model, scope of the present utility model is by appended claim definition.

Claims (8)

1. electric energy meter calibrating installation, it is characterized in that it comprises simulated power source (2), high-accuracy voltage mutual inductor PT (3), high precision current transformer CT (4), high accuracy number voltage table (5,6), AD sampling module (7), stipulations generation module (8), administration module (9), mock standard table (10), measured number amount input type electric energy meter (11), Error Calculator (12) and control computer (1);
Described control computer (1) is controlled simulated power source (2) respectively, mock standard table (10), high accuracy number voltage table (5,6) and AD sampling module (7), the voltage signal that described simulated power source (2) the produces voltage input end that inserts high precision PT (3) and mock standard table (10) in parallel, the current signal series connection that simulated power source (2) produces inserts the current input terminal of high precision CT (4) and mock standard table (10), the analog output voltage signal of described high precision PT (3) and high precision CT (4) connects the input end of AD sampling module (7), and by high accuracy number voltage table (5,6) measure respectively, the external trigger lead-out terminal of described AD sampling module (7) and high accuracy number voltage table (5,6) external trigger input terminal connects, AD sampling module (7) is connected with stipulations generation module (8) by internal bus, the input end of the output termination measured number amount input type electric energy meter (11) of described stipulations generation module (8), measured number amount input type electric energy meter (11) is connected with mock standard table (10).
2. electric energy meter calibrating installation according to claim 1 is characterized in that described simulated power source, and voltage and current signal can be independently adjustable, and wherein voltage output range is 60-100V, and the electric current output area is 0.5-5A.
3. electric energy meter calibration system according to claim 2 is characterized in that described mock standard table is high-precision power transducer C1-2 and standard voltmeter, is the high-grade surveying instrument that is used for measuring electric power and electric energy.
4. electric energy meter calibrating installation according to claim 3, it is characterized in that described high precision PT and high precision CT, adopt vector synthetic technology and transmission technology certainly to design, guarantee the precision of conversion, this device is converted to the small voltage simulating signal of 0-5V with big voltage, current signal, exports to the AD sampling module.
5. electric energy meter calibrating installation according to claim 4, it is characterized in that described AD sampling module and stipulations generation module, adopt 24 A/D converter, with analog signal conversion is discrete digital signal, discrete digital signal is converted to the data that meet IEC61850 stipulations pattern by the stipulations modular converter, link to each other with the electric energy meter of digital quantity input, this device can link to each other with computer by the gpib bus system, is provided with and the control correlation parameter.
6. electric energy meter calibrating installation according to claim 5, it is characterized in that described control computer is connected with Error Calculator with simulated power source, mock standard table, high accuracy number voltage table, AD sampling module by gpib bus, the output in control simulated power source and the setting of AD sampling module, read the test data of mock standard table, high accuracy number voltage table, Error Calculator, analytical calculation draws the error of tested electric energy meter.
7. electric energy meter calibrating installation according to claim 6 is characterized in that described stipulations generation module is connected with measured number amount input type electric energy meter by optical fiber or twisted-pair feeder.
8. electric energy meter calibrating installation according to claim 7 is characterized in that described administration module has optical fiber, twisted-pair feeder RJ45 and three kinds of output interfaces of USB.
CN2009202780619U 2009-12-11 2009-12-11 Watt-hour meter calibration device CN201569736U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102621514A (en) * 2012-03-31 2012-08-01 哈尔滨工业大学 Electronic transformer verifying device
CN101718856B (en) * 2009-12-11 2012-12-26 中国电力科学研究院 Calibration system of digital quantity input type electric energy meter
CN102944774A (en) * 2012-10-30 2013-02-27 上海晟东电力科技有限公司 Automatic correction device and correction method for precision of analog quantity of power distribution terminal
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
CN103091552A (en) * 2011-10-31 2013-05-08 无锡华润矽科微电子有限公司 Pre-calibrated electric energy metering circuit and calibration method
CN103336264A (en) * 2013-06-07 2013-10-02 国家电网公司 Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection
CN103901389A (en) * 2014-04-09 2014-07-02 国家电网公司 Verifying device and method of analog electric signal electric energy meter, analog electronic signal electric energy meter and digital signal electric energy meter
CN105301551A (en) * 2015-10-29 2016-02-03 国网上海市电力公司 Watt-hour meter calibration device and method outputting current under 1mA
CN106405479A (en) * 2016-10-21 2017-02-15 中国电力科学研究院 Intelligent junction box used for gateway electric energy meter field inspection and inspection method thereof
CN108877187A (en) * 2017-12-29 2018-11-23 国网山东省电力公司嘉祥县供电公司 A kind of intelligent electric energy meter metrical information acquisition method and system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718856B (en) * 2009-12-11 2012-12-26 中国电力科学研究院 Calibration system of digital quantity input type electric energy meter
CN103091552B (en) * 2011-10-31 2015-12-02 无锡华润矽科微电子有限公司 Pre-calibrated electric energy metering circuit and calibration steps
CN103091552A (en) * 2011-10-31 2013-05-08 无锡华润矽科微电子有限公司 Pre-calibrated electric energy metering circuit and calibration method
CN102621514B (en) * 2012-03-31 2014-05-07 哈尔滨工业大学 Electronic transformer verifying device
CN102621514A (en) * 2012-03-31 2012-08-01 哈尔滨工业大学 Electronic transformer verifying device
CN102944774A (en) * 2012-10-30 2013-02-27 上海晟东电力科技有限公司 Automatic correction device and correction method for precision of analog quantity of power distribution terminal
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
CN103336264A (en) * 2013-06-07 2013-10-02 国家电网公司 Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection
CN103336264B (en) * 2013-06-07 2015-04-01 国家电网公司 Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection
CN103901389A (en) * 2014-04-09 2014-07-02 国家电网公司 Verifying device and method of analog electric signal electric energy meter, analog electronic signal electric energy meter and digital signal electric energy meter
CN105301551A (en) * 2015-10-29 2016-02-03 国网上海市电力公司 Watt-hour meter calibration device and method outputting current under 1mA
CN106405479A (en) * 2016-10-21 2017-02-15 中国电力科学研究院 Intelligent junction box used for gateway electric energy meter field inspection and inspection method thereof
CN108877187A (en) * 2017-12-29 2018-11-23 国网山东省电力公司嘉祥县供电公司 A kind of intelligent electric energy meter metrical information acquisition method and system
CN108877187B (en) * 2017-12-29 2019-12-27 国网山东省电力公司嘉祥县供电公司 Intelligent electric energy meter metering information acquisition method and system

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Effective date of registration: 20140326

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

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Patentee after: China Electric Power Research Institute

Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15

Patentee before: China Electric Power Research Institute

Effective date of registration: 20140326

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: China Electric Power Research Institute

Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15

Patentee before: China Electric Power Research Institute

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