CN109212292A - A kind of power supply type voltage transformer and application method with voltage measurement function - Google Patents
A kind of power supply type voltage transformer and application method with voltage measurement function Download PDFInfo
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- CN109212292A CN109212292A CN201811215537.4A CN201811215537A CN109212292A CN 109212292 A CN109212292 A CN 109212292A CN 201811215537 A CN201811215537 A CN 201811215537A CN 109212292 A CN109212292 A CN 109212292A
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- voltage
- voltage measurement
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- power supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of power supply type voltage transformers with voltage measurement function, comprising: the first component, for receiving first voltage；Power output unit carries out power output, exports second voltage；Voltage measurement unit, for the voltage transformer that the second voltage is converted to tertiary voltage, for carrying out voltage measurement；Current transformer, for being measured to load current；Compensating impedance, it connects with the secondary side winding of the voltage measurement unit, and it is in parallel with the current transformer, for when customer charge changes, the pressure drop that compensation load current generates on the primary side of voltage measurement unit and secondary side leakage reactance, compensates the error of voltage measurement with realizing.The compensating impedance is connected on the circuit of voltage measurement unit winding by the compensating impedance of certain numerical value in parallel on load current and carries out error compensation by the present invention, realizes power from 0 to when exporting at full capacity, error meets metering grade error limit requirement.
Description
Technical field
The present invention relates to measurement and calibration fields, and more particularly, to a kind of power supply type with voltage measurement function
Voltage transformer and application method.
Background technique
What transformer and voltage transformer were all made of is the working principle of electromagnetic induction, and a kind of electric energy of alternating voltage is turned
Change the electric energy of another alternating voltage of same frequency into.Transformer is mainly the electric energy for transmitting large capacity or vast capacity, and mutual
Sensor is mainly used for voltage measurement, is a kind of special transformer for being dedicated as voltage of transformation, and this difference is to transformer
It is had an impact with the main design parameters of mutual inductor.
Since transformer is concern is primarily with output capacity, the requirement to its output voltage numerical value by voltage class not
Together, by changing in ± 5% to 10% range.Due to the presence of leakage reactance, when output capacity changes greatly, output voltage can be deposited
It is fluctuating on a large scale, for the supply transformer to load center supply electric power, to guarantee that supply voltage is stablized, it usually needs
It is equipped with on-load regulator transformer.This is also the reason of transformer cannot act as voltage transformer.Voltage transformer is a kind of special
The transformer of design is stablized since load is small, is that can achieve high accurate limit requirement by design.
Therefore, for the power supply of large capacity, how design voltage mutual inductor, and carry out voltage measurement accurately to meet standard
Exactness requirement is problem to be solved.
Summary of the invention
The invention proposes a kind of power supply type voltage transformers and application method with voltage measurement function, to solve such as
What accurately carries out the problem of voltage measurement is to meet accuracy requirement using power supply type voltage transformer.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided a kind of confession with voltage measurement function
Electric type voltage transformer, the power supply type voltage transformer include:
The first component is connect with voltage input end, and with second component mutual inductance, for receiving the from the voltage input end
One voltage；
Second component is connect with voltage output end, for exporting second voltage to the voltage output end, to realize power
Output and voltage measurement；The second component, comprising:
Power output unit, and the first component mutual inductance, and be separately connected with the voltage output end, to carry out power
Output, exports the second voltage；
Voltage measurement unit is separately connected with the voltage output end, in parallel with institute's power output unit to realize, described
Voltage measurement unit is the voltage transformer that the second voltage is converted to tertiary voltage, for carrying out voltage measurement；
Current transformer is connected with the voltage output end, for measuring to load current；
Compensating impedance is connected with the secondary side winding of the voltage measurement unit, and in parallel with the current transformer, is used
In when customer charge changes, compensation load current generates on the primary side of voltage measurement unit and secondary side leakage reactance
Pressure drop compensates the error of voltage measurement with realizing.
Preferably, wherein the second voltage is the 220V power-frequency voltage for being supplied to user.
Preferably, wherein the tertiary voltage is in the preset range threshold value of standard voltage threshold, the normal voltage
Threshold value is 57.7V, and the preset range threshold value is set according to the system requirements of power grid.
According to another aspect of the present invention, it provides a kind of using as described above with the power supply of voltage measurement function
The method of type voltage transformer progress voltage measurement, which comprises
The first component receives first voltage from voltage input end；
Power output unit and first component mutual inductance carry out power output, export second voltage；
Current transformer measures load current；
When customer charge changes, compensating impedance compensates load current in the primary side of voltage measurement unit and secondary
The anti-upper pressure drop generated of side leakage, compensates the error of voltage measurement, and carry out voltage measurement using voltage measurement unit, obtains
Take tertiary voltage.
Preferably, wherein the second voltage is the 220V power-frequency voltage for being supplied to user.
Preferably, wherein the tertiary voltage is in the preset range threshold value of standard voltage threshold, the normal voltage
Threshold value is 57.7V, and the preset range threshold value is set according to the system requirements of power grid.
The present invention provides a kind of power supply type voltage transformer with voltage measurement function, the power supply type mutual induction of voltage
The output voltage of the power output unit of device is 220V, can be directly realized by customer power supply, voltage measurement unit be directly with
One of the winding parallel of power output unit hasSmall electromagnetic potential transformer, by small electricity
The secondary winding of electromagnetic type voltage transformer carries out error compensation, realizes voltage measurement function；On the winding of power output unit
Series current mutual inductor, for monitoring load current, by the compensating impedance of certain numerical value in parallel on load current, and should
Compensating impedance, which is connected on the circuit of voltage measurement unit winding, carries out error compensation, realizes power from 0 to exporting at full capacity
When, error meets metering grade error limit requirement.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is the structure according to the power supply type voltage transformer 100 with voltage measurement function of embodiment of the present invention
Schematic diagram；
Fig. 2 is the schematic diagram according to the power supply type voltage transformer with voltage measurement function of embodiment of the present invention；
Fig. 3 is the schematic diagram according to the power supply type voltage transformer with voltage measurement function of embodiment of the present invention；
Fig. 4 is to carry out electricity according to the power supply type voltage transformer that the use of embodiment of the present invention has voltage measurement function
Press the flow chart of the method 400 of metering.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the structure according to the power supply type voltage transformer 100 with voltage measurement function of embodiment of the present invention
Schematic diagram.How shown in 1, the function for the power supply type voltage transformer with voltage measurement function that embodiments of the present invention provide
The output voltage of rate output unit is 220V, can be directly realized by customer power supply, voltage measurement unit is directly defeated with power
One of the winding parallel of unit has outSmall electromagnetic potential transformer, by small electromagnetic type electricity
It presses the secondary winding of mutual inductor to carry out error compensation, realizes voltage measurement function；The series electrical on the winding of power output unit
Current transformer by the compensating impedance of certain numerical value in parallel on load current, and the compensation is hindered for monitoring load current
Anti- be connected on the circuit of voltage measurement unit winding carries out error compensation, realizes power from 0 to when exporting at full capacity, error
Meet metering grade error limit requirement.The power supply type mutual induction of voltage with voltage measurement function that embodiments of the present invention provide
Device 100, comprising: the first component 101 and second component 102.Preferably, the first component 101, connect with voltage input end,
And with second component mutual inductance, for from the voltage input end receive first voltage.
Preferably, the second component 102, connect with voltage output end, for exporting second to the voltage output end
Voltage, to realize power output and voltage measurement.
Second component 102 includes: power output unit 1021, voltage measurement unit 1022, current transformer 1023 and mends
Repay impedance 1024.
Preferably, the power output unit 1021, and 101 mutual inductance of the first component, and with the voltage output end
It is separately connected, to carry out power output, exports the second voltage.
Preferably, wherein the second voltage is the 220V power-frequency voltage for being supplied to user.
Preferably, the voltage measurement unit 1022, is separately connected with the voltage output end, defeated with institute power to realize
Unit 1021 is in parallel out, and the voltage measurement unit 1022 is the mutual induction of voltage that the second voltage is converted to tertiary voltage
Device, for carrying out voltage measurement.
Preferably, the current transformer 1023, connects with the voltage output end, for surveying to load current
Amount.
Preferably, the compensating impedance 1024 is connected with the secondary side winding of the voltage measurement unit 1022, and with institute
It is in parallel to state current transformer 1023, for when customer charge changes, compensating load current in voltage measurement unit 1022
Primary side and secondary side leakage reactance on the pressure drop that generates, the error of voltage measurement is compensated with realizing.
Preferably, wherein the tertiary voltage is in the preset range threshold value of standard voltage threshold, the normal voltage
Threshold value is 57.7V, and the preset range threshold value is set according to the system requirements of power grid.
Fig. 2 is the schematic diagram according to the power supply type voltage transformer with voltage measurement function of embodiment of the present invention.
As shown in Fig. 2, U1 is high tension voltage, voltage measurement is the voltage transformer that low voltage is converted to 57.7V, potentiometer with PT
Amount is compensative winding with PT load.The output voltage of power output winding is 220V, can be directly realized by customer power supply, voltage
Metering units winding is directly to have with one of power output unit winding parallelSmall electromagnetic potential
Mutual inductor, when customer charge variation, the load error of voltage measurement voltage transformer becomes with the variation of load current
Change, by using the method for no-load error compensation and load error compensation, realizes the error compensation of voltage measurement winding.
Fig. 3 is the schematic diagram according to the power supply type voltage transformer with voltage measurement function of embodiment of the present invention.
As shown in figure 3, AN is the HV Terminal of primary side, T is power supply type voltage transformer, and an is power output terminal, PT1, that is, voltage
Metering units, for the voltage transformer that voltage transformer low voltage is converted to 57.7V, CT is the electricity for loading current monitoring
Current transformer, Z are compensating impedance, and 1a1n is voltage measurement terminal.By on power output winding and meeting the PT1 of high accuracy
It converts voltages into needed for meteringVoltage, when the connect load of an changes, due to the variation of load current,
The error of 1a1n will increase, by the way that Z concatenation in the loop, is compensated the primary side due to load current in PT1 and secondary side leakage
The anti-upper pressure drop generated can be realized simultaneously the function of power output and voltage measurement to realize the compensation of error.
Fig. 4 is to carry out electricity according to the power supply type voltage transformer that the use of embodiment of the present invention has voltage measurement function
Press the flow chart of the method 400 of metering.As shown in figure 4, the use that embodiments of the present invention provide has the function of voltage measurement
Power supply type voltage transformer carry out the method 400 of voltage measurement since step 401 place, in step 401 first component from electricity
Input terminal is pressed to receive first voltage.
Preferably, power output is carried out in step 402 power output unit and first component mutual inductance, exports second voltage.
Preferably, wherein the second voltage is the 220V power-frequency voltage for being supplied to user.
Preferably, load current is measured in step 403 current transformer.
Preferably, in step 404 when customer charge changes, compensating impedance compensates load current in voltage measurement list
The pressure drop generated on the primary side and secondary side leakage reactance of member, compensates the error of voltage measurement, and utilizes voltage measurement list
Member carries out voltage measurement, obtains tertiary voltage.
Preferably, wherein the tertiary voltage is in the preset range threshold value of standard voltage threshold, the normal voltage
Threshold value is 57.7V, and the preset range threshold value is set according to the system requirements of power grid.
There is the power supply type voltage transformer of voltage measurement function to carry out voltage measurement for the use of the embodiment of the present invention
Method 400 has the power supply type voltage transformer 100 of voltage measurement function corresponding with another embodiment of the invention,
This is repeated no more.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (6)
1. a kind of power supply type voltage transformer with voltage measurement function, which is characterized in that the power supply type voltage transformer
Include:
The first component is connect with voltage input end, and with second component mutual inductance, for from the voltage input end receive first electricity
Pressure；
Second component is connect with voltage output end, for exporting second voltage to the voltage output end, to realize power output
And voltage measurement；The second component, comprising:
Power output unit, and the first component mutual inductance, and be separately connected with the voltage output end, it is defeated to carry out power
Out, the second voltage is exported；
Voltage measurement unit is separately connected with the voltage output end, to realize, the voltage in parallel with institute's power output unit
Metering units are the voltage transformer that the second voltage is converted to tertiary voltage, for carrying out voltage measurement；
Current transformer is connected with the voltage output end, for measuring to load current；
Compensating impedance is connected with the secondary side winding of the voltage measurement unit, and in parallel with the current transformer, for working as
When customer charge changes, the pressure that load current generates on the primary side of voltage measurement unit and secondary side leakage reactance is compensated
Drop compensates the error of voltage measurement with realizing.
2. power supply type voltage transformer according to claim 1, which is characterized in that the second voltage is to be supplied to user
220V power-frequency voltage.
3. power supply type voltage transformer according to claim 1, which is characterized in that the tertiary voltage is in normal voltage
In the preset range threshold value of threshold value, the standard voltage threshold is 57.7V, and the preset range threshold value is wanted according to the system of power grid
Ask setting.
4. a kind of method for carrying out voltage measurement using power supply type voltage transformer as described in claim 1, which is characterized in that
The described method includes:
The first component receives first voltage from voltage input end；
Power output unit and first component mutual inductance carry out power output, export second voltage；
Current transformer measures load current；
When customer charge changes, compensating impedance compensates primary side and secondary side leakage of the load current in voltage measurement unit
The anti-upper pressure drop generated, compensates the error of voltage measurement, and carries out voltage measurement using voltage measurement unit, acquisition the
Three voltages.
5. according to the method described in claim 4, it is characterized in that, the second voltage is to be supplied to the 220V power frequency electric of user
Pressure.
6. according to the method described in claim 4, it is characterized in that, the tertiary voltage is in the default model of standard voltage threshold
It encloses in threshold value, the standard voltage threshold is 57.7V, and the preset range threshold value is set according to the system requirements of power grid.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215537.4A CN109212292A (en) | 2018-10-18 | 2018-10-18 | A kind of power supply type voltage transformer and application method with voltage measurement function |
| PCT/CN2019/105701 WO2020078156A1 (en) | 2018-10-18 | 2019-09-12 | Voltage transformer and method for using same to meter voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215537.4A CN109212292A (en) | 2018-10-18 | 2018-10-18 | A kind of power supply type voltage transformer and application method with voltage measurement function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109212292A true CN109212292A (en) | 2019-01-15 |
Family
ID=64980818
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811215537.4A Pending CN109212292A (en) | 2018-10-18 | 2018-10-18 | A kind of power supply type voltage transformer and application method with voltage measurement function |
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| CN (1) | CN109212292A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020078156A1 (en) * | 2018-10-18 | 2020-04-23 | 中国电力科学研究院有限公司 | Voltage transformer and method for using same to meter voltage |
| CN111208470A (en) * | 2020-02-21 | 2020-05-29 | 中国电力科学研究院有限公司 | Method and system for testing short circuit bearing capacity of voltage transformer |
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| US4893069A (en) * | 1988-06-29 | 1990-01-09 | Nishimu Electronics Industries Co., Ltd. | Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads |
| CN2396399Y (en) * | 1999-06-14 | 2000-09-13 | 成都正惠电气投资发展公司 | PT secondary loop valtage drop automatic metering compensator |
| CN102360857A (en) * | 2011-05-30 | 2012-02-22 | 国网电力科学研究院 | Integrated network distributing transformer with error compensating mutual inductor |
| CN205920140U (en) * | 2016-05-11 | 2017-02-01 | 广州粤能电力科技开发有限公司 | Measurement voltage transformer secondary load compensation arrangement and electric energy metering device |
| CN107611983A (en) * | 2017-09-30 | 2018-01-19 | 中国电力科学研究院 | A kind of integration apparatus for realizing error compensation power supply |
-
2018
- 2018-10-18 CN CN201811215537.4A patent/CN109212292A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4893069A (en) * | 1988-06-29 | 1990-01-09 | Nishimu Electronics Industries Co., Ltd. | Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads |
| CN2396399Y (en) * | 1999-06-14 | 2000-09-13 | 成都正惠电气投资发展公司 | PT secondary loop valtage drop automatic metering compensator |
| CN102360857A (en) * | 2011-05-30 | 2012-02-22 | 国网电力科学研究院 | Integrated network distributing transformer with error compensating mutual inductor |
| CN205920140U (en) * | 2016-05-11 | 2017-02-01 | 广州粤能电力科技开发有限公司 | Measurement voltage transformer secondary load compensation arrangement and electric energy metering device |
| CN107611983A (en) * | 2017-09-30 | 2018-01-19 | 中国电力科学研究院 | A kind of integration apparatus for realizing error compensation power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020078156A1 (en) * | 2018-10-18 | 2020-04-23 | 中国电力科学研究院有限公司 | Voltage transformer and method for using same to meter voltage |
| CN111208470A (en) * | 2020-02-21 | 2020-05-29 | 中国电力科学研究院有限公司 | Method and system for testing short circuit bearing capacity of voltage transformer |
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Application publication date: 20190115 |