CN101806876A - Electronic type transformer checking system - Google Patents

Electronic type transformer checking system Download PDF

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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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voltage
transformer
electronic
standard
industrial computer
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李开成
李振兴
易杨
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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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)

1.一种电子式电流互感器的校验系统，包括调压器(1)、升流器(2)、标准电流互感器(3)、取样电阻(4)、数表(5)、待校验的电子式电流互感器(6)、合并单元(7)和工控机(11)，所述数表(5)获取标准电流互感器(3)的测量值，所述合并单元(7)获取待校验的电子式电流互感器(6)的测量值，上述数表(5)获取的测量值与合并单元(7)获取的测量值同时送入工控机(11)，由工控机(11)计算出两测量值的比差和角差，完成校验。1. A calibration system for an electronic current transformer, comprising a voltage regulator (1), a current booster (2), a standard current transformer (3), a sampling resistor (4), a digital meter (5), a waiting Checked electronic current transformer (6), merging unit (7) and industrial computer (11), the digital meter (5) obtains the measured value of the standard current transformer (3), and the merging unit (7) Obtain the measured value of the electronic current transformer (6) to be verified, the measured value obtained by the above-mentioned digital table (5) and the measured value obtained by the merging unit (7) are sent to the industrial computer (11) simultaneously, and the industrial computer ( 11) Calculate the ratio difference and angle difference of the two measured values, and complete the verification. 2.根据权利要求1所述的电子式电流互感器的校验系统，其特征在于，所述升流器(2)提供被测电流，该被测电流同时流过所述标准电流互感器(3)的一次侧和待校验的电子式电流互感器(6)的一次侧，所述的标准电流互感器(3)的二次侧接标准电阻(4)，所述标准电阻(4)两端的电压信号送入数表(5)。2. the verification system of electronic current transformer according to claim 1, is characterized in that, described current booster (2) provides measured current, and this measured current flows through described standard current transformer ( 3) and the primary side of the electronic current transformer (6) to be verified, the secondary side of the standard current transformer (3) is connected to the standard resistor (4), and the standard resistor (4) The voltage signal at both ends is sent into the digital meter (5). 3.根据权利要求1或2所述的电子式电流互感器的校验系统，其特征在于，该校验系统还包括时钟同步电路(8)，所述工控机(11)控制所述时钟同步电路(8)使其发出时钟同步信号并同时送给所述数表(5)和合并单元(8)，所述数表(5)获取的测量值与所述合并单元(7)获取的测量值同时送入工控机(11)。3. The checking system of the electronic current transformer according to claim 1 or 2, characterized in that, the checking system also includes a clock synchronization circuit (8), and the industrial computer (11) controls the clock synchronization The circuit (8) makes it send a clock synchronization signal and sends it to the digital table (5) and the merging unit (8) at the same time, the measured value obtained by the digital table (5) and the measured value obtained by the merging unit (7) Value is sent into industrial computer (11) simultaneously. 4.根据权利要求1-3之一所述的电子式电流互感器的校验系统，其特征在于，所述数表(5)获取的测量值与所述合并单元(7)获取的测量值通过通用接口总线和/或以太网送入所述工控机(11)。4. The verification system of the electronic current transformer according to any one of claims 1-3, characterized in that, the measured value obtained by the digital meter (5) and the measured value obtained by the merging unit (7) Send it to the industrial computer (11) through a general interface bus and/or Ethernet. 5.根据权利要求1-4之一所述的电子式电流互感器的校验系统，其特征在于，所述的校验系统能同时适应IEC61850-9-1和IEC61850-9-2标准。5. The electronic current transformer calibration system according to any one of claims 1-4, characterized in that, the calibration system can adapt to both the IEC61850-9-1 and IEC61850-9-2 standards. 6.一种电子式电压互感器的校验系统，包括调压器(1)、升压器(2)、标准电压互感器(3)、数表(4)、待校验的电子式电压互感器(5)、合并单元(6)和工控机(10)，所述数表(5)获取标准电压互感器(3)的电压测量值，由合并单元(7)获取待校验的电子式电压互感器(5)的电压测量值，上述数表(5)获得的电压测量值与合并单元(7)获得的电压测量值同时送入工控机(10)，由工控机(10)计算出两电压测量值的比差和角差，完成校验。6. A calibration system for an electronic voltage transformer, comprising a voltage regulator (1), a voltage booster (2), a standard voltage transformer (3), a digital meter (4), and an electronic voltage transformer to be verified Transformer (5), merging unit (6) and industrial computer (10), described digital table (5) obtains the voltage measurement value of standard potential transformer (3), obtains the electronic voltage to be verified by merging unit (7). The measured voltage value of the type voltage transformer (5), the measured voltage value obtained by the above-mentioned digital table (5) and the measured voltage value obtained by the merging unit (7) are simultaneously sent to the industrial computer (10), calculated by the industrial computer (10) The ratio difference and angle difference of the two voltage measurement values are output to complete the calibration. 7.根据权利要求6所述的电子式电压互感器的校验系统，其特征在于，所述升压器(2)提供待测高电压，该待测高电压被同时施加到标准电压互感器(3)和待校验的电子式电压互感器(5)的一次侧，标准电压互感器(5)的二次侧输出电压信号并被送入所述数表(4)，同时，待校验的电子式电压互感器(5)的电压采样值被送入合并单元(7)。7. The verification system of electronic voltage transformer according to claim 6, characterized in that, the booster (2) provides a high voltage to be measured, and the high voltage to be measured is applied to the standard voltage transformer simultaneously (3) and the primary side of the electronic voltage transformer (5) to be checked, the secondary side output voltage signal of the standard voltage transformer (5) is sent into the said digital table (4), meanwhile, the The voltage sampling value of the tested electronic voltage transformer (5) is sent to the merging unit (7). 8.根据权利要求6或7所述的电子式电压互感器的校验系统，其特征在于，该校验系统还包括时钟同步电路(7)，所述工控机(10)控制时钟同步电路(7)使其发出时钟同步信号并同时送给所述数表(4)和合并单元(7)，所述数表(4)获取的电压测量值与所述合并单元(6)获取的电压测量值同时送入工控机(10)。8. The verification system of the electronic voltage transformer according to claim 6 or 7, characterized in that, the verification system also includes a clock synchronization circuit (7), and the industrial computer (10) controls the clock synchronization circuit ( 7) make it send clock synchronous signal and send to described digital table (4) and merging unit (7) simultaneously, the voltage measurement value that described digital table (4) obtains and the voltage measurement that described merging unit (6) obtains Value is sent into industrial computer (10) simultaneously. 9.根据权利要求6-8之一所述的电子式电流互感器的校验系统，其特征在于，所述数表(5)获取的电压测量值与所述合并单元(7)获取的电压测量值通过通用接口总线和/或以太网送入所述工控机(10)。9. The verification system of the electronic current transformer according to any one of claims 6-8, characterized in that, the voltage measurement value obtained by the digital meter (5) and the voltage obtained by the merging unit (7) The measured values are sent to the industrial computer (10) through a general interface bus and/or Ethernet. 10.根据权利要求6-9之一所述的电子式电流互感器的校验系统，其特征在于，所述的校验系统能同时适应IEC61850-9-1和IEC61850-9-2标准。10. The calibration system for electronic current transformers according to any one of claims 6-9, characterized in that the calibration system can simultaneously adapt to IEC61850-9-1 and IEC61850-9-2 standards.
CN 201010166052 2010-05-10 2010-05-10 Electronic type transformer checking system Pending CN101806876A (en)

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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
CN105353331A (en) * 2015-10-29 2016-02-24 中国电力科学研究院 Electronic transformer metering performance detection system and method
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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
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
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
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
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
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
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
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
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Application publication date: 20100818