CN101806876A - Electronic type transformer checking system - Google Patents

Electronic type transformer checking system Download PDF

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Publication number
CN101806876A
CN101806876A CN 201010166052 CN201010166052A CN101806876A CN 101806876 A CN101806876 A CN 101806876A CN 201010166052 CN201010166052 CN 201010166052 CN 201010166052 A CN201010166052 A CN 201010166052A CN 101806876 A CN101806876 A CN 101806876A
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CN
China
Prior art keywords
transformer
numerical
voltage
check
industrial computer
Prior art date
Application number
CN 201010166052
Other languages
Chinese (zh)
Inventor
李开成
李振兴
易杨
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华中科技大学
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Publication date
Application filed by 华中科技大学 filed Critical 华中科技大学
Priority to CN 201010166052 priority Critical patent/CN101806876A/en
Publication of CN101806876A publication Critical patent/CN101806876A/en

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Abstract

The invention provides an electronic type transformer checking system, comprising a voltage regulator, a current booster (or a pressure booster), a standard CT (Current Transformer) or a standard PT (Pressure Transformer), a numerical table, an electronic type current transformer (or an electronic type voltage transformer), a merge unit, a synchronous clock circuit and an industrial personal computer. The numerical table acquires a current measurement value of a standard CT or a voltage measurement value of the standard PT), and the merge unit acquires a current measurement value of the electronic type current transformer (or a voltage measurement value of the electronic type voltage transformer). The measurement results acquired by the numerical table and the measurement results acquired by the merge unit are sent to the computer synchronously, and the computer calculates ratio difference and angular difference. The invention has the advantages of high precision, good stability and tracing basis, and can be applied to checking electronic type transformers with high precision.

Description

Electronic type transformer checking system

Technical field

The present invention relates to be used for the electronic mutual inductor of electric power system alternating current electric current and voltage measurement, particularly relate to the check system of electronic mutual inductor.

Background technology

Two most important indexs of mutual inductor are respectively ratio and angular difference, and the size of error is directly connected to the accuracy of metering and the correctness of protection, and therefore, it is very important and very necessary that mutual inductor is carried out the high precision verification.Differential technique is generally adopted in the traditional electromagnetic transformer contrast differences and the verification of angular difference, and method is very ripe.Along with the implementation of digital transformer substation and intelligent grid, electronic mutual inductor becomes the new instrument of power system measuring electric current and voltage, because its principle of work is different from traditional electromagnetic transformer, so the method for calibration of contrast differences and angular difference is also fully different.

Present checking electronic type transformers device generally is based on the signal that data collecting card obtains standard CT or PT.Because capture card generally exists temperature to float and stability problem, and can't trace to the source, therefore can not guarantee enough precision with its verification electronic mutual inductor.

Electronic type transformer checking system of the present invention obtains the signal of standard CT or PT with the high precision numerical table, its good stability, and the precision height can be traced to the source, and therefore can guarantee enough precision with its verification electronic mutual inductor, has the foundation of transmission of quantity value.

Summary of the invention

The present invention proposes the calibration equipment of a kind of electronic current mutual inductor and electronic type voltage transformer, have the measuring accuracy height, can trace to the source, simple in structure, reliable and stable, can be widely used in the characteristics of the verification of electronic current mutual inductor and electronic type voltage transformer.

A kind of check system of electronic current mutual inductor, comprise pressure regulator, current lifting device, standard current transformer, sample resistance, numerical table, electronic current mutual inductor, merge cells and industrial computer to be verified, described numerical table obtains the measured value of standard current transformer, described merge cells obtains the measured value of electronic current mutual inductor to be verified, the measured value that measured value that above-mentioned numerical table is obtained and merge cells obtain is sent into industrial computer simultaneously, calculate the ratio and the angular difference of two measured values by industrial computer, finish verification.

Current lifting device of the present invention provides tested electric current, this tested electric current flows through the primary side of described standard current transformer and the primary side of electronic current mutual inductor to be verified simultaneously, the secondary side joint measuring resistance of described standard current transformer, described standard resistor at two terminals is taken out voltage signal and is sent into numerical table.

Check system of the present invention also comprises clock synchronization circuit, described industrial computer is controlled described clock synchronization circuit makes it send clock sync signal and give described numerical table and merge cells simultaneously, and the measured value that measured value that described numerical table obtains and described merge cells obtain is sent into industrial computer simultaneously.

The measured value that measured value that described numerical table of the present invention is got and described merge cells obtain is sent into described industrial computer by general purpose interface bus and/or Ethernet.

Check system of the present invention can simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.

A kind of check system of electronic type voltage transformer, comprise pressure regulator, stepup transformer, standard potential transformer, numerical table, electronic type voltage transformer, merge cells and industrial computer to be verified, described numerical table obtains the voltage measuring value of standard potential transformer, obtain the voltage measuring value of electronic type voltage transformer to be verified by merge cells, the voltage measuring value of above-mentioned numerical table acquisition and the voltage measuring value of merge cells acquisition are sent into industrial computer simultaneously, calculate the ratio and the angular difference of two voltage measuring values by industrial computer, finish verification.

Stepup transformer of the present invention provides high voltage to be measured, this high voltage to be measured is applied simultaneously the primary side of standard potential transformer and electronic type voltage transformer to be verified, the secondary side output voltage signal of standard potential transformer also is admitted to described numerical table, simultaneously, the voltage sample value of electronic type voltage transformer to be verified is admitted to merge cells.

Check system of the present invention also comprises clock synchronization circuit, described industrial computer control clock synchronization circuit makes it send clock sync signal and gives described numerical table and merge cells simultaneously, and the voltage measuring value that voltage measuring value that described numerical table obtains and described merge cells obtain is sent into industrial computer simultaneously.

The voltage measuring value that voltage measuring value that numerical table of the present invention obtains and described merge cells obtain is sent into described industrial computer by general purpose interface bus and/or Ethernet.

Check system of the present invention can simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.

Technique effect of the present invention: 1, measuring accuracy height, good stability.2, measurement result can be traced to the source, and has confidence level.

Description of drawings

Fig. 1 is an electronic current mutual inductor verification schematic diagram;

Fig. 2 is an electronic type voltage transformer verification schematic diagram.

Embodiment

The present invention will be further described below in conjunction with the drawings and specific embodiments.

Electronic current mutual inductor check system of the present invention comprises pressure regulator 1, current lifting device 2, standard current transformer 3, sample resistance 4, numerical table 5, electronic current mutual inductor 6, merge cells 7, clock synchronization circuit 8, numerical table digital signal output 9, Ethernet 10 and industrial computer 11.

Provide tested electric current by current lifting device 2, this electric current flows through the primary side of standard current transformer and tested electronic current mutual inductor 6 simultaneously.The output voltage of regulating pressure regulator 1 can change the output current of current lifting device 2.The secondary side joint high precision standard resistance 4 of standard current transformer takes out voltage signal and sends into high precision numerical table 5 from the resistance two ends, its sampled value is sent into industrial computer 11 by general purpose interface bus 9.Meanwhile, the current sampling data of tested electronic current mutual inductor is admitted to merge cells 7, and sends into industrial computer by Ethernet 10.Two paths of signals is sent into industrial computer simultaneously, is gone out the ratio and the angular difference of electronic current mutual inductor by computed in software.In order to obtain the current information of synchronization, send clock sync signal by clock synchronization circuit 8, and give numerical table and merge cells simultaneously.The requirement of this check system energy simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.

Electronic type voltage transformer check system of the present invention comprises pressure regulator 1, stepup transformer 2, standard potential transformer 3, numerical table 4, electronic type voltage transformer 5, merge cells 6, clock synchronization circuit 7, numerical table digital signal output 8, Ethernet 9 and industrial computer 10.

Provide high voltage by stepup transformer 2, this voltage is applied simultaneously the primary side of standard potential transformer 3 and tested electronic type voltage transformer 5.The secondary side output voltage signal of standard potential transformer also is admitted to numerical table 4, and its sampled value is admitted to industrial computer 10 by general purpose interface bus 8.Simultaneously, the voltage sample value of tested voltage transformer (VT) is admitted to merge cells 6, and sends into industrial computer 10 by Ethernet 9.Two paths of signals is sent into computing machine simultaneously, is gone out the ratio and the angular difference of electronic type voltage transformer by computed in software.In order to obtain the synchronization information of voltage, send clock sync signal by clock synchronization circuit 7, and give numerical table and merge cells simultaneously.The requirement of this check system energy simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.

Standard potential transformer 3 has very high measuring accuracy, generally be higher than by 5 two accuracy classes of school electronic type voltage transformer or more than.Numerical table 5 requires the same.

Claims (10)

1. the check system of an electronic current mutual inductor, comprise pressure regulator (1), current lifting device (2), standard current transformer (3), sample resistance (4), numerical table (5), electronic current mutual inductor to be verified (6), merge cells (7) and industrial computer (11), described numerical table (5) obtains the measured value of standard current transformer (3), described merge cells (7) obtains the measured value of electronic current mutual inductor to be verified (6), the measured value that measured value that above-mentioned numerical table (5) obtains and merge cells (7) obtain is sent into industrial computer (11) simultaneously, calculate the ratio and the angular difference of two measured values by industrial computer (11), finish verification.
2. the check system of electronic current mutual inductor according to claim 1, it is characterized in that, described current lifting device (2) provides tested electric current, this tested electric current flows through the primary side of described standard current transformer (3) and the primary side of electronic current mutual inductor (6) to be verified simultaneously, the secondary side joint measuring resistance (4) of described standard current transformer (3), the voltage signal at described measuring resistance (4) two ends is sent into numerical table (5).
3. the check system of electronic current mutual inductor according to claim 1 and 2, it is characterized in that, this check system also comprises clock synchronization circuit (8), described industrial computer (11) is controlled described clock synchronization circuit (8) makes it send clock sync signal and give described numerical table (5) and merge cells (8) simultaneously, and the measured value that measured value that described numerical table (5) obtains and described merge cells (7) obtain is sent into industrial computer (11) simultaneously.
4. according to the check system of one of claim 1-3 described electronic current mutual inductor, it is characterized in that the measured value that measured value that described numerical table (5) obtains and described merge cells (7) obtain is sent into described industrial computer (11) by general purpose interface bus and/or Ethernet.
5. according to the check system of one of claim 1-4 described electronic current mutual inductor, it is characterized in that described check system can simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.
6. the check system of an electronic type voltage transformer, comprise pressure regulator (1), stepup transformer (2), standard potential transformer (3), numerical table (4), electronic type voltage transformer to be verified (5), merge cells (6) and industrial computer (10), described numerical table (5) obtains the voltage measuring value of standard potential transformer (3), obtain the voltage measuring value of electronic type voltage transformer to be verified (5) by merge cells (7), the voltage measuring value that voltage measuring value that above-mentioned numerical table (5) obtains and merge cells (7) obtain is sent into industrial computer (10) simultaneously, calculate the ratio and the angular difference of two voltage measuring values by industrial computer (10), finish verification.
7. the check system of electronic type voltage transformer according to claim 6, it is characterized in that, described stepup transformer (2) provides high voltage to be measured, this high voltage to be measured is applied simultaneously the primary side of standard potential transformer (3) and electronic type voltage transformer (5) to be verified, the secondary side output voltage signal of standard potential transformer (5) also is admitted to described numerical table (4), simultaneously, the voltage sample value of electronic type voltage transformer (5) to be verified is admitted to merge cells (7).
8. according to the check system of claim 6 or 7 described electronic type voltage transformers, it is characterized in that, this check system also comprises clock synchronization circuit (7), described industrial computer (10) control clock synchronization circuit (7) makes it send clock sync signal and gives described numerical table (4) and merge cells (7) simultaneously, and the voltage measuring value that voltage measuring value that described numerical table (4) obtains and described merge cells (6) obtain is sent into industrial computer (10) simultaneously.
9. according to the check system of one of claim 6-8 described electronic current mutual inductor, it is characterized in that the voltage measuring value that voltage measuring value that described numerical table (5) obtains and described merge cells (7) obtain is sent into described industrial computer (10) by general purpose interface bus and/or Ethernet.
10. according to the check system of one of claim 6-9 described electronic current mutual inductor, it is characterized in that described check system can simultaneous adaptation IEC61850-9-1 and IEC61850-9-2 standard.
CN 201010166052 2010-05-10 2010-05-10 Electronic type transformer checking system CN101806876A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073029A (en) * 2011-02-16 2011-05-25 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102129058A (en) * 2010-12-15 2011-07-20 中国西电电气股份有限公司 Direct-current voltage divider calibration device for direct-current power transmission system
CN102253353A (en) * 2011-04-19 2011-11-23 河北省电力研究院 Method and device for automatically calibrating micro-ammeters
CN102305893A (en) * 2011-05-25 2012-01-04 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN102435974A (en) * 2011-06-16 2012-05-02 江苏靖江互感器厂有限公司 Novel high-efficient portable electronic transformer inspection instrument for intelligent power grid
CN102662152A (en) * 2012-05-15 2012-09-12 河南省电力公司济源供电公司 Electronic type mutual inductor as well as system and method for verifying merging unit
CN102854484A (en) * 2012-08-16 2013-01-02 深圳市星龙科技有限公司 Signal sampling accuracy detecting system of combining unit of intelligent substation
CN102928802A (en) * 2012-10-16 2013-02-13 江西省电力科学研究院 Method for detecting alternating current-direct current standard-based direct current resistance performance of current transformer
CN103018599A (en) * 2012-12-05 2013-04-03 四川电力科学研究院 Method for three-phase detection of errors of three-phase electronic transformer of gas insulated switchgear (GIS)
CN103076515A (en) * 2012-12-28 2013-05-01 中国电力科学研究院 Merging unit integral detection and evaluation system
CN103344838A (en) * 2013-06-27 2013-10-09 中国西电电气股份有限公司 Device and method for measuring resistance value of microhm shunt under large currents
CN103376437A (en) * 2012-04-28 2013-10-30 南京河海南自水电自动化有限公司 Transformer calibrator compatible with both electromagnetic transformer calibration and electronic transformer calibration
CN104267363A (en) * 2014-09-26 2015-01-07 天津电气科学研究院有限公司 High-current sensor calibration method based on standard low resistance method
CN104316891A (en) * 2014-09-29 2015-01-28 许继电气股份有限公司 Electronic mutual inductor performance real-time monitoring system and method
CN105510859A (en) * 2016-01-28 2016-04-20 云南电网有限责任公司电力科学研究院 System and method for evaluating electronic transformer
CN105548948A (en) * 2016-01-28 2016-05-04 云南电网有限责任公司电力科学研究院 Device and method for testing digitalization electric energy metering system
CN106546940A (en) * 2016-11-16 2017-03-29 国网上海市电力公司 A kind of field testing procedure of optical voltage transformer
CN106772190A (en) * 2016-11-23 2017-05-31 国家电网公司 The test comparison method and device of electronic type voltage transformer under the conditions of a kind of VFTO
CN108872916A (en) * 2018-06-07 2018-11-23 南方电网科学研究院有限责任公司 A kind of optical current mutual inductor correction of temperature drift test method and device
CN109375139A (en) * 2018-11-06 2019-02-22 国网内蒙古东部电力有限公司电力科学研究院 A kind of device and method of automatic testing light fiber current mutual inductor

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102129058A (en) * 2010-12-15 2011-07-20 中国西电电气股份有限公司 Direct-current voltage divider calibration device for direct-current power transmission system
CN102073029A (en) * 2011-02-16 2011-05-25 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102073029B (en) * 2011-02-16 2013-06-12 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102253353A (en) * 2011-04-19 2011-11-23 河北省电力研究院 Method and device for automatically calibrating micro-ammeters
CN102305893B (en) * 2011-05-25 2013-09-25 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN102305893A (en) * 2011-05-25 2012-01-04 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN102435974A (en) * 2011-06-16 2012-05-02 江苏靖江互感器厂有限公司 Novel high-efficient portable electronic transformer inspection instrument for intelligent power grid
CN103376437A (en) * 2012-04-28 2013-10-30 南京河海南自水电自动化有限公司 Transformer calibrator compatible with both electromagnetic transformer calibration and electronic transformer calibration
CN102662152A (en) * 2012-05-15 2012-09-12 河南省电力公司济源供电公司 Electronic type mutual inductor as well as system and method for verifying merging unit
CN102854484A (en) * 2012-08-16 2013-01-02 深圳市星龙科技有限公司 Signal sampling accuracy detecting system of combining unit of intelligent substation
CN102854484B (en) * 2012-08-16 2015-04-29 深圳市星龙科技股份有限公司 Signal sampling accuracy detecting system of combining unit of intelligent substation
CN102928802A (en) * 2012-10-16 2013-02-13 江西省电力科学研究院 Method for detecting alternating current-direct current standard-based direct current resistance performance of current transformer
CN102928802B (en) * 2012-10-16 2015-02-18 江西省电力科学研究院 Method for detecting alternating current-direct current standard-based direct current resistance performance of current transformer
CN103018599A (en) * 2012-12-05 2013-04-03 四川电力科学研究院 Method for three-phase detection of errors of three-phase electronic transformer of gas insulated switchgear (GIS)
CN103076515A (en) * 2012-12-28 2013-05-01 中国电力科学研究院 Merging unit integral detection and evaluation system
CN103344838A (en) * 2013-06-27 2013-10-09 中国西电电气股份有限公司 Device and method for measuring resistance value of microhm shunt under large currents
CN104267363A (en) * 2014-09-26 2015-01-07 天津电气科学研究院有限公司 High-current sensor calibration method based on standard low resistance method
CN104316891A (en) * 2014-09-29 2015-01-28 许继电气股份有限公司 Electronic mutual inductor performance real-time monitoring system and method
CN105510859A (en) * 2016-01-28 2016-04-20 云南电网有限责任公司电力科学研究院 System and method for evaluating electronic transformer
CN105548948A (en) * 2016-01-28 2016-05-04 云南电网有限责任公司电力科学研究院 Device and method for testing digitalization electric energy metering system
CN106546940A (en) * 2016-11-16 2017-03-29 国网上海市电力公司 A kind of field testing procedure of optical voltage transformer
CN106772190A (en) * 2016-11-23 2017-05-31 国家电网公司 The test comparison method and device of electronic type voltage transformer under the conditions of a kind of VFTO
CN108872916A (en) * 2018-06-07 2018-11-23 南方电网科学研究院有限责任公司 A kind of optical current mutual inductor correction of temperature drift test method and device
CN109375139A (en) * 2018-11-06 2019-02-22 国网内蒙古东部电力有限公司电力科学研究院 A kind of device and method of automatic testing light fiber current mutual inductor

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Application publication date: 20100818