CN202502242U - Error measurement device for voltage transformer - Google Patents

Error measurement device for voltage transformer Download PDF

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Publication number
CN202502242U
CN202502242U CN201220121456XU CN201220121456U CN202502242U CN 202502242 U CN202502242 U CN 202502242U CN 201220121456X U CN201220121456X U CN 201220121456XU CN 201220121456 U CN201220121456 U CN 201220121456U CN 202502242 U CN202502242 U CN 202502242U
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China
Prior art keywords
transformer
voltage
measured
winding
voltage transformer
Prior art date
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Active
Application number
CN201220121456XU
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Chinese (zh)
Inventor
陈文中
王之浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Municipal Electric Power Co
East China Power Test and Research Institute Co Ltd
Original Assignee
Shanghai Municipal Electric Power Co
East China Power Test and Research Institute Co Ltd
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Priority to CN201220121456XU priority Critical patent/CN202502242U/en
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Abstract

The utility model relates to an error measurement device for a voltage transformer. The device is connected with a voltage transformer to be measured and comprises a voltage booster, a standard voltage transformer and an error measurement device. The voltage booster is separately connected with the input ends of the voltage transformer to be measured and the standard voltage transformer, the non-polar end of the secondary voltage of the voltage transformer to be measured and the non-polar end of the secondary voltage of the standard voltage transformer are respectively connected with the measured end and the standard end of the error measurement device, and the polar ends of the voltage transformer to be measured and the standard voltage transformer are connected with the polar end of the error measurement device after being connected in parallel. Compared with the prior art, the error measurement device for the voltage transformer provided by the utility model has the advantages of less equipment, simple structure, reliable operation and the like.

Description

A kind of voltage transformer error measurement mechanism
Technical field
The utility model relates to a kind of error measuring means, especially relates to a kind of voltage transformer error measurement mechanism.
Background technology
Needs along with electronic computer technology application in power system measuring, protection and automatic control; Competitively research and develop high-voltage sensor at present both at home and abroad; Sensor has good linear transformation characteristic, is to be applicable to that electronic computer system replaces the renewal product of nonlinear mutual inductor.
Though sensor has so good performance; But in order further to improve product stability; Need voltage sensor is carried out the accuracy test; Voltage transformer error measurement mechanism in the market has that equipment is various, the difficult problem of difficult; Disclose a kind of error testing device of voltage transformator like utility application 201020246037.X, wherein, microprocessor connects PLD of connecting with the multichannel chip for driving and the Direct Digital Frequency Synthesizers of connecting with power amplifier unit; The control end group of control relay group connects first output terminal of multichannel chip for driving; The corresponding output terminal that connects power amplifier unit, standard sense subdivision, current conversion unit of first, second, third, fourth input end group; First, second, third, fourth output terminal group all connects the input end of microprocessor, the corresponding input end that connects voltage conversion unit, current conversion unit of the 5th, the 6th output terminal group; The corresponding second input end group of control relay group, the input end of standard sense subdivision of connecting of first, second output terminal of voltage conversion unit.Therefore be necessary to design a kind of simple and reliable voltage transformer error measurement mechanism.
Summary of the invention
The purpose of the utility model is exactly for the defective that overcomes above-mentioned prior art existence a kind of simple and reliable voltage transformer error measurement mechanism to be provided.
The purpose of the utility model can realize through following technical scheme:
A kind of voltage transformer error measurement mechanism; This device connects voltage transformer (VT) to be measured; It is characterized in that; Described device comprises stepup transformer, standard potential transformer and error measuring means; Described stepup transformer connects the input end of voltage transformer (VT) to be measured and standard potential transformer respectively, and the secondary voltage non-polar end of said voltage transformer (VT) to be measured, the secondary voltage non-polar end of standard potential transformer connect the seized end and the normal end of error measuring means respectively, is connected the polar end of error measuring means after the polar end parallel connection of the polar end of said voltage transformer (VT) to be measured and standard potential transformer.
Described current transformer to be measured is made up of a winding and a plurality of Secondary Winding; One of them Secondary Winding of said a plurality of Secondary Winding is as winding to be measured; Be provided with the voltage Burden box between these winding to be measured two ends, all the other Secondary Winding two ends connect back ground connection through the voltage Burden box.
Described a plurality of Secondary Winding comprises 2-10.
Described stepup transformer is made up of the resonance reactor of one group of polyphone, and stepup transformer one end connects power supply.
Described resonance reactor is provided with 2 at least.
Compared with prior art, the utlity model has few, the simple in structure and reliable advantage of equipment.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of voltage transformer error measurement mechanism connects voltage transformer (VT) CVT to be measured, comprises stepup transformer 2, standard potential transformer P 0With error measuring means 1, stepup transformer is made up of the resonance reactor LZ of one group of polyphone, and resonance reactor LZ is provided with 2 at least, and stepup transformer 2 connects voltage transformer (VT) CVT to be measured and standard potential transformer P respectively 0Input end, stepup transformer 2 one ends connect power supply.
Current transformer CVT to be measured is made up of a winding and a plurality of Secondary Winding, and a plurality of Secondary Winding are included as 2, and one of them Secondary Winding of a plurality of Secondary Winding is provided with voltage Burden box Y as winding to be measured between these winding to be measured two ends 1, all the other Secondary Winding two ends are through voltage Burden box Y 2Connect back ground connection.The secondary voltage non-polar end of voltage transformer (VT) CVT to be measured, standard potential transformer P 0The secondary voltage non-polar end connect the seized end and the normal end of error measuring means 1, the polar end of voltage transformer (VT) CVT to be measured and standard potential transformer P respectively 0The polar end parallel connection after connect the polar end of error measuring means 1.
This measurement mechanism adopts relative method that voltage transformer (VT) is tested, and at first uses high pressure standard voltage divider C NCheck one with the identical standard potential transformer P of voltage transformer (VT) CVT no-load voltage ratio to be measured 0, regulate high pressure standard voltage divider C NIntrinsic standoff ratio make the tester indicating value equal standard potential transformer P 0Certified value, then with voltage transformer (VT) CVT to be measured replacement standard potential transformer, under the voltage percentage of regulation, measure the error of voltage transformer (VT) CVT to be measured.

Claims (5)

1. voltage transformer error measurement mechanism; This device connects voltage transformer (VT) to be measured; It is characterized in that; Described device comprises stepup transformer, standard potential transformer and error measuring means; Described stepup transformer connects the input end of voltage transformer (VT) to be measured and standard potential transformer respectively, and the secondary voltage non-polar end of said voltage transformer (VT) to be measured, the secondary voltage non-polar end of standard potential transformer connect the seized end and the normal end of error measuring means respectively, is connected the polar end of error measuring means after the polar end parallel connection of the polar end of said voltage transformer (VT) to be measured and standard potential transformer.
2. a kind of voltage transformer error measurement mechanism according to claim 1; It is characterized in that; Described current transformer to be measured is made up of a winding and a plurality of Secondary Winding; One of them Secondary Winding of said a plurality of Secondary Winding is provided with the voltage Burden box as winding to be measured between these winding to be measured two ends, and all the other Secondary Winding two ends connect back ground connection through the voltage Burden box.
3. a kind of voltage transformer error measurement mechanism according to claim 2 is characterized in that, described a plurality of Secondary Winding comprise 2-10.
4. a kind of voltage transformer error measurement mechanism according to claim 1 is characterized in that, described stepup transformer is made up of the resonance reactor of one group of polyphone, and stepup transformer one end connects power supply.
5. a kind of voltage transformer error measurement mechanism according to claim 4 is characterized in that described resonance reactor is provided with 2 at least.
CN201220121456XU 2012-03-27 2012-03-27 Error measurement device for voltage transformer Active CN202502242U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201220121456XU CN202502242U (en) 2012-03-27 2012-03-27 Error measurement device for voltage transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201220121456XU CN202502242U (en) 2012-03-27 2012-03-27 Error measurement device for voltage transformer

Publications (1)

Publication Number Publication Date
CN202502242U true CN202502242U (en) 2012-10-24

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CN201220121456XU Active CN202502242U (en) 2012-03-27 2012-03-27 Error measurement device for voltage transformer

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CN (1) CN202502242U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105372616A (en) * 2015-12-10 2016-03-02 国家电网公司 CVT state on-line test system and on-line evaluation method
CN106405465A (en) * 2015-07-29 2017-02-15 中国电力科学研究院 Voltage transformer measurement error checking method
CN107677980A (en) * 2017-09-30 2018-02-09 国网四川省电力公司电力科学研究院 A kind of power distribution network transformer metering performance integration detection platform and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106405465A (en) * 2015-07-29 2017-02-15 中国电力科学研究院 Voltage transformer measurement error checking method
CN105372616A (en) * 2015-12-10 2016-03-02 国家电网公司 CVT state on-line test system and on-line evaluation method
CN107677980A (en) * 2017-09-30 2018-02-09 国网四川省电力公司电力科学研究院 A kind of power distribution network transformer metering performance integration detection platform and method
CN107677980B (en) * 2017-09-30 2019-12-10 国网四川省电力公司电力科学研究院 Integrated detection platform and method for metering performance of mutual inductor of power distribution network

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