CN109116288A - A kind of three-phase combination transformer calibrating installation - Google Patents
A kind of three-phase combination transformer calibrating installation Download PDFInfo
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- CN109116288A CN109116288A CN201811315676.4A CN201811315676A CN109116288A CN 109116288 A CN109116288 A CN 109116288A CN 201811315676 A CN201811315676 A CN 201811315676A CN 109116288 A CN109116288 A CN 109116288A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The application discloses a kind of three-phase combination transformer calibrating installation, comprising: mutual-inductor tester T10, three-phase program-controlled voltage source T6, three-phase voltage increasing device T1, three-phase standard potential transformer T2, threephase potential transformer load box Y, three-phase program-controlled constant-current source T8, three-phase high-voltage current lifting device T5, three-phase high-voltage standard current transformer TAo, threephase current transformer load box Z and controller；The application can really reflect the actual error of mutual inductor, realize the ability verified simultaneously to threephase potential transformer and threephase current transformer, promote the test class of accuracy of mutual-inductor tester.Using the three-phase combination transformer tester of the direct method of measurement, make to be isolated entirely between tested mutual inductor and the secondary output of standard mutual inductor, without three-phase error of measurement route, avoid the influence problem between every phase voltage, current signal, simultaneously, present application addresses manually-operated non intelligentization is needed in the prior art, improve work efficiency.
Description
Technical field
This application involves three-phase combination transformer technical field more particularly to a kind of three-phase combination transformer calibrating installations.
Background technique
In the power system, the public affairs that electric energy meter and metering with mutual inductor are related to all Electricity customers, sell electric enterprise
Flat trade settlement.Wherein, current transformer and voltage transformer are generally comprised inside metering three-phase combination transformer, mainly
The important measurement instrument of 10kV-35kV electricity consumption large user, metering accuracy are directly related to power supply company and the trade of large user
Easily clearing accuracy, it is therefore desirable to it be examined and determine for the first time using calibrating installation and periodic calibration.
One existing Calibration Technology scheme examines and determine combination using low-voltage standards current transformer and single-phase calibration method
Then current transformer inside mutual inductor examines and determine mutual induction of voltage in combination transformer by standard potential transformer and single plane method
Device.The program the problem is that, single-phase verification is different from three-phase combination transformer actual motion state, when actual motion, often
One potential and current transformers, which has mutual electromagnetic effect and electric field, to be influenced, and the numerical values recited of influence is that it is accurate
What grade be can not ignore, therefore test data cannot react the true error of mutual inductor.In addition, being measured using single-phase wheel sequence, need
It is artificial to repeat wiring 6 times, it tests 6 times, workload is very big.The method that another prior art uses three phase mains test, it is main
If manually being boosted and being flowed up using pressure regulator using artificial wiring, the degree of automation is low, and due to using manual three-phase tune
Depressor, therefore failure rate of machinery is higher.Moreover, can not be positioned for S grades of current transformers, and due to using three-phase regulator liter
Pressure up-flow (by the way of voltage source), and it is uneven plus the payload size in three-phase up-flow circuit, power factor is different, causes
The symmetry of the three-phase current of high pressure current lifting device output is unable to reach testing requirements, is unable to control three-phase high-voltage electric current and three-phase is high
Phase relation between voltage, and examine and determine require need the phase relation between three-phase current and three-phase voltage fix and close to
0°。
Therefore, the defect for how overcoming the above-mentioned prior art is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The application provides a kind of three-phase combination transformer calibrating installation, to solve the prior art using single-phase wheel sequence calibrating side
Method does not meet the actual motion state of mutual inductor, and verification result accuracy is poor and the degree of automation is low, and stability difference is asked
Topic.
The embodiment of the present application provides a kind of three-phase combination transformer calibrating installation, comprising: mutual-inductor tester T10, three-phase
Program-controlled voltage source T6, three-phase voltage increasing device T1, three-phase standard potential transformer T2, threephase potential transformer load box Y, three-phase program-controlled
Constant-current source T8, three-phase high-voltage current lifting device T5, three-phase high-voltage standard current transformer TAo, threephase current transformer load box Z and
Controller；
The output end of the three-phase program-controlled voltage source T6 is connect with the input terminal of the three-phase voltage increasing device T1；
The output end of the three-phase voltage increasing device T1 is mutual with the three-phase standard potential transformer T2, tested three-phase voltage respectively
The connection of one end of sensor T3 and tested threephase current transformer TAx；
The other end of the three-phase standard potential transformer T2 is connect with the mutual-inductor tester T10；
The output end of the three-phase program-controlled constant-current source T8 is connect with the input terminal of the three-phase high-voltage current lifting device T5；
The output end of the three-phase high-voltage current lifting device T5 respectively with three-phase high-voltage standard current transformer TAo and described tested
One end of threephase current transformer TAx connects；
The other end of the three-phase high-voltage standard current transformer TAo is connect with the mutual-inductor tester T10；
The tested threephase potential transformer T3 is connected with threephase potential transformer load box Y, the three-phase voltage mutual inductance
Device load box Y is connect with the mutual-inductor tester T10；
The tested threephase current transformer TAx is connected with threephase current transformer load box Z, the three-phase current mutual inductance
Device load box Z is connect with the mutual-inductor tester T10；
The three-phase program-controlled voltage source T6 and three-phase program-controlled constant-current source T8 connects with the mutual-inductor tester T10
It connects；
The mutual-inductor tester T10 is connect with the controller.
Further, the mutual-inductor tester T10 is connect by RS232 serial ports with the controller.
Further, the three-phase program-controlled voltage source T6 is connect by RS485 serial ports with the mutual-inductor tester T10.
Further, the three-phase program-controlled constant-current source T8 is connect by RS485 serial ports with the mutual-inductor tester T10.
Further, the mutual-inductor tester T10 is equipped with the liquid crystal display for showing test data.
From the above technical scheme, the application provides a kind of three-phase combination transformer calibrating installation, comprising: mutual inductor school
Test instrument T10, three-phase program-controlled voltage source T6, three-phase voltage increasing device T1, three-phase standard potential transformer T2, threephase potential transformer load
Case Y, three-phase program-controlled constant-current source T8, three-phase high-voltage current lifting device T5, three-phase high-voltage standard current transformer TAo, three-phase current mutual inductance
Device load box Z and controller；Wherein, three-phase program-controlled voltage source T6 is used for according to the instruction of mutual-inductor tester T10 output three
Low pressure is become high pressure by three-phase voltage increasing device T1 by phase alternating voltage, input of the voltage of output as three-phase voltage increasing device T1, and
It is applied to three-phase standard potential transformer T2, tested threephase potential transformer T3 and tested threephase current transformer TAx；Three-phase
Program controlled constant current source T8 is used to export three-phase alternating-current supply according to the instruction of mutual-inductor tester T10, and the electric current of output is as three-phase
The input of high pressure current lifting device T5 is increased to high current by three-phase high-voltage current lifting device T5, to for three-phase high-voltage normalized current it is mutual
Sensor TAo and the tested threephase current transformer TAx pass to test high-voltage great-current.Mutual-inductor tester T10 will be for that will mark
Error measure between quasi- mutual inductor and tested mutual inductor comes out and sends controller to.
Compared with prior art, the application calibrating installation due to applying three-phase high voltage and three-phase current simultaneously, thus accords with
The actual working state for closing three-phase combination transformer, can really reflect the actual error of mutual inductor, realize to three-phase voltage
The ability that mutual inductor and threephase current transformer verify simultaneously, improves the test class of accuracy of mutual-inductor tester, reaches
0.05 (S) grade.Also, the application uses the three-phase combination transformer tester of the direct method of measurement, makes tested mutual inductor and standard
It is isolated entirely between the secondary output of mutual inductor, is not necessarily to three-phase error of measurement route, the influence avoided between every phase voltage, current signal is asked
Topic, improves the safety in test process, meanwhile, the application device solves needs manually-operated non-intelligence in the prior art
It the problem of capable of changing, improves work efficiency.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of the application circuit company of three-phase combination transformer calibrating installation shown according to an exemplary embodiment
Connect schematic diagram.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
Fig. 1 is a kind of circuit connection diagram of three-phase combination transformer calibrating installation provided in this embodiment, refering to figure
1, which includes: mutual-inductor tester T10, three-phase program-controlled voltage source T6, three-phase voltage increasing device T1, three-phase standard potential transformer
T2, threephase potential transformer load box Y, three-phase program-controlled constant-current source T8, three-phase high-voltage current lifting device T5, three-phase high-voltage normalized current are mutual
Sensor TAo, threephase current transformer load box Z and controller；
The output end of the three-phase program-controlled voltage source T6 is connect with the input terminal of the three-phase voltage increasing device T1；
The output end of the three-phase voltage increasing device T1 is mutual with the three-phase standard potential transformer T2, tested three-phase voltage respectively
The connection of one end of sensor T3 and tested threephase current transformer TAx；
The other end of the three-phase standard potential transformer T2 is connect with the mutual-inductor tester T10；
The output end of the three-phase program-controlled constant-current source T8 is connect with the input terminal of the three-phase high-voltage current lifting device T5；
The output end of the three-phase high-voltage current lifting device T5 respectively with three-phase high-voltage standard current transformer TAo and described tested
One end of threephase current transformer TAx connects；
The other end of the three-phase high-voltage standard current transformer TAo is connect with the mutual-inductor tester T10；
The tested threephase potential transformer T3 is connected with threephase potential transformer load box Y, the three-phase voltage mutual inductance
Device load box Y is connect with the mutual-inductor tester T10；
The tested threephase current transformer TAx is connected with threephase current transformer load box Z, the three-phase current mutual inductance
Device load box Z is connect with the mutual-inductor tester T10；
The three-phase program-controlled voltage source T6 and three-phase program-controlled constant-current source T8 connects with the mutual-inductor tester T10
It connects；
The mutual-inductor tester T10 is connect with the controller.
In the three-phase combination transformer calibrating installation of above structure, it is configured with computer control software in controller, is used for
It receives the test data of mutual-inductor tester T10 feedback and is sent to it instruction；Mutual-inductor tester T10 is by the instruction of controller
It is converted into as needed to three-phase program-controlled voltage source T6, three-phase program-controlled constant-current source T8, threephase potential transformer load box Y and three
The control instruction of phase current mutual inductor load box Z；By corresponding control instruction, the three-phase electricity of three-phase program-controlled voltage source T6 is controlled
Press output size, the three-phase current output size of three-phase program-controlled constant-current source T8 and threephase potential transformer load box Y and three-phase
The gear of current transformer load box Z.
Three-phase program-controlled voltage source T6 is used for the control instruction sent according to mutual-inductor tester T10, output 0V~250V's
Three-phase alternating voltage, input of the voltage of output as three-phase voltage increasing device T1；By three-phase voltage increasing device T1 by the low of 0V~250V
The high pressure that pressure is boosted into 0kV~45kV；The output end of three-phase voltage increasing device T1 respectively with three-phase standard potential transformer T2, tested three
One end of phase voltage mutual inductor T3 and tested threephase current transformer TAx connection, for three-phase standard potential transformer T2,
Tested threephase potential transformer T3 and tested threephase current transformer TAx applies test voltage.
Three-phase program-controlled constant-current source T8 is used for the control instruction sent according to mutual-inductor tester T10, exports three-phase alternating current
Source, input of the electric current of output as three-phase high-voltage current lifting device T5 are increased to high current by three-phase high-voltage current lifting device T5；Three-phase
High pressure current lifting device T5 output end respectively with three-phase high-voltage standard current transformer TAo and tested threephase current transformer TAx one
End connection, for passing to examination for the first winding of three-phase high-voltage standard current transformer TAo and tested threephase current transformer TAx
Test high-voltage great-current.
It should be noted that the three-phase program-controlled constant-current source T8 in the present embodiment carries negative feedback control function, work as external electrical
When current load changes, can rapid feedback, for control outputting current steadily to setting value, the setting value includes amplitude
And phase relation.
Threephase potential transformer load box Y, including Ya, Yb and Yc are connect with tested threephase potential transformer T3, are used for mould
The load of quasi- tested threephase potential transformer T3 secondary winding；
Threephase current transformer load box Z, including Za, Zb and Zc connect with tested threephase current transformer TAx, are used for
Simulate the load of tested threephase current transformer TAx secondary winding.
Mutual-inductor tester T10, for by three-phase high-voltage standard current transformer TAo, three-phase standard potential transformer T2,
The secondary output electric current of tested threephase current transformer TAx and tested threephase potential transformer T3 in tested combination transformer or
Voltage signal (at most total 12 tunnels) obtains measurement data by internal measurement circuit and A/D synchronous acquisition；To measurement data
It carries out FFT calculating and necessary software algorithm calculates, obtain the ratio error and phase between corresponding standard signal and measured signal
Position error, and error information is sent to controller.
Preferably, the mutual-inductor tester T10 is connect by RS232 serial ports with the controller.
Preferably, the three-phase program-controlled voltage source T6 is connect by RS485 serial ports with the mutual-inductor tester T10.
Preferably, the three-phase program-controlled constant-current source T8 is connect by RS485 serial ports with the mutual-inductor tester T10.
Preferably, the mutual-inductor tester T10 is equipped with the liquid crystal display for showing test data.
Compared with prior art, three-phase combination transformer calibrating installation provided in this embodiment at least has beneficial below
Effect:
Firstly, the secondary output voltage or electric current of the direct measurement standard mutual inductor of mutual-inductor tester and subject mutual inductor,
12 Measurement channels are all made of accurate isolated voltage transformer or accurate isolation current transformer sampling.Signal isolation performance can be with
Anti-interference ability is significantly promoted, influencing each other between every phase signals is avoided, stable testing is reliable, and safety is able to greatly
Amplitude improves.
Secondly, mutual-inductor tester can verify three-phase current and threephase potential transformer simultaneously, and it is high-efficient, it is primary to verify
All working can be completed.Rather than use the measurement for taking turns the every phase voltage of sequence or electric current or three-phase voltage test and three-phase current test
The case where not taking into account.
Again, can will soon be reached using three-phase program-controlled constant-current source rather than three-phase program-controlled voltage source, liter current course
Current point is tested, program controlled constant current source receives test instruction, exports target current, exports electric current by negative feedback control and quickly arrives
Up to current setpoint.The size of traditional voltage source control output electric current needs special design test circuit and control circuit, real
The purpose of electric current is now controlled, single plane method check problem is not special protrusion, when threephase current transformer verifies, due to three
Phase primary circuit payload size is inconsistent, and power factor is inconsistent, therefore controls reality with the voltage source that three-phase symmetrical exports
The electric current of existing three-phase symmetrical is unpractical.It is thus best using three-phase program-controlled constant-current source effect.
Finally, improving device using automatic threephase potential transformer load box Y and threephase current transformer load box Z
Automatization level.
In the specific implementation, the present invention also provides a kind of computer storage mediums, wherein the computer storage medium can store
There is program, which may include step some or all of in each embodiment of software approach provided by the invention when executing.Institute
The storage medium stated can for magnetic disk, CD, read-only memory (English: read-only memory, referred to as: ROM) or with
Machine storage memory (English: random access memory, referred to as: RAM) etc..
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on this understanding, the technical solution in the embodiment of the present invention substantially or
Say that the part that contributes to existing technology can be embodied in the form of software products, which can deposit
Storage is in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that computer equipment (can be with
It is personal computer, server or the network equipment etc.) execute certain part institutes of each embodiment of the present invention or embodiment
The method stated.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (5)
1. a kind of three-phase combination transformer calibrating installation, which is characterized in that described device includes: mutual-inductor tester T10, three-phase
Program-controlled voltage source T6, three-phase voltage increasing device T1, three-phase standard potential transformer T2, threephase potential transformer load box Y, three-phase program-controlled
Constant-current source T8, three-phase high-voltage current lifting device T5, three-phase high-voltage standard current transformer TAo, threephase current transformer load box Z and
Controller；
The output end of the three-phase program-controlled voltage source T6 is connect with the input terminal of the three-phase voltage increasing device T1；
The output end of the three-phase voltage increasing device T1 respectively with the three-phase standard potential transformer T2, tested threephase potential transformer
The connection of one end of T3 and tested threephase current transformer TAx；
The other end of the three-phase standard potential transformer T2 is connect with the mutual-inductor tester T10；
The output end of the three-phase program-controlled constant-current source T8 is connect with the input terminal of the three-phase high-voltage current lifting device T5；
The output end of the three-phase high-voltage current lifting device T5 respectively with three-phase high-voltage standard current transformer TAo and the tested three-phase
One end of current transformer TAx connects；
The other end of the three-phase high-voltage standard current transformer TAo is connect with the mutual-inductor tester T10；
The tested threephase potential transformer T3 is connected with threephase potential transformer load box Y, and the threephase potential transformer is negative
Case Y is carried to connect with the mutual-inductor tester T10；
The tested threephase current transformer TAx is connected with threephase current transformer load box Z, and the threephase current transformer is negative
Case Z is carried to connect with the mutual-inductor tester T10；
The three-phase program-controlled voltage source T6 and the three-phase program-controlled constant-current source T8 are connect with the mutual-inductor tester T10；
The mutual-inductor tester T10 is connect with the controller.
2. the apparatus according to claim 1, which is characterized in that the mutual-inductor tester T10 passes through RS232 serial ports and institute
State controller connection.
3. the apparatus according to claim 1, which is characterized in that the three-phase program-controlled voltage source T6 by RS485 serial ports with
The mutual-inductor tester T10 connection.
4. the apparatus according to claim 1, which is characterized in that the three-phase program-controlled constant-current source T8 by RS485 serial ports with
The mutual-inductor tester T10 connection.
5. the apparatus according to claim 1, which is characterized in that the mutual-inductor tester T10 is equipped with for showing test
The liquid crystal display of data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811315676.4A CN109116288A (en) | 2018-11-06 | 2018-11-06 | A kind of three-phase combination transformer calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811315676.4A CN109116288A (en) | 2018-11-06 | 2018-11-06 | A kind of three-phase combination transformer calibrating installation |
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| CN109116288A true CN109116288A (en) | 2019-01-01 |
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| CN201811315676.4A Pending CN109116288A (en) | 2018-11-06 | 2018-11-06 | A kind of three-phase combination transformer calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710978A (en) * | 2020-11-30 | 2021-04-27 | 国网北京市电力公司 | Detection system of anti-direct current transformer |
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Application publication date: 20190101 |