CN202502242U - Error measurement device for voltage transformer - Google Patents
Error measurement device for voltage transformer Download PDFInfo
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- 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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- transformer
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- voltage transformer
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- error measurement
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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
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.
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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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220121456XU Expired - Lifetime CN202502242U (en) | 2012-03-27 | 2012-03-27 | Error measurement device for voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202502242U (en) |
Cited By (4)
| 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 |
| CN106597349A (en) * | 2017-01-25 | 2017-04-26 | 云南电网有限责任公司电力科学研究院 | CVT measurement error on-line monitoring method and CVT measurement error on-line monitoring system based on secondary voltage |
| 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 |
-
2012
- 2012-03-27 CN CN201220121456XU patent/CN202502242U/en not_active Expired - Lifetime
Cited By (6)
| 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 |
| CN106597349A (en) * | 2017-01-25 | 2017-04-26 | 云南电网有限责任公司电力科学研究院 | CVT measurement error on-line monitoring method and CVT measurement error on-line monitoring system based on secondary voltage |
| CN106597349B (en) * | 2017-01-25 | 2023-05-23 | 云南电网有限责任公司电力科学研究院 | CVT metering error on-line monitoring method and system based on secondary voltage |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |
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| CX01 | Expiry of patent term |