CN109212293A - 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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- CN109212293A CN109212293A CN201811216310.1A CN201811216310A CN109212293A CN 109212293 A CN109212293 A CN 109212293A CN 201811216310 A CN201811216310 A CN 201811216310A CN 109212293 A CN109212293 A CN 109212293A
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- voltage
- voltage measurement
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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)
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- General Physics & Mathematics (AREA)
- Control Of Electrical Variables (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 from voltage input end；Power output unit, for exporting second voltage to voltage output end, to realize power output；Voltage measurement unit obtains tertiary voltage for realizing voltage measurement；Current transformer, for being measured to load current；Compensating impedance, with the voltage measurement windings in series of the power output 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 present invention proposes a kind of power supply type voltage transformer and application method with voltage measurement function, with solve how
The problem of voltage measurement is to meet accuracy requirement is accurately carried out 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, for receiving first voltage from the voltage input end；
Power output unit is used to export second voltage to voltage output end, to realize function with the first component mutual inductance
Rate output；
Voltage measurement unit obtains tertiary voltage with the first component mutual inductance for realizing voltage measurement；
Current transformer, the power output windings in series with the power output unit, for being surveyed to load current
Amount；
Compensating impedance, the voltage measurement windings in series with the power output unit, and it is in parallel with the current transformer,
For when customer charge changes, compensation load current to generate on the primary side of voltage measurement unit and secondary side leakage reactance
Pressure drop, with realize the error of voltage measurement is compensated.
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 exports second voltage to voltage output end, to realize power output；
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 transformers with voltage measurement function, comprising: the first component is used for
First voltage is received from voltage input end；Power output unit, with first component mutual inductance, output voltage 220V, to realize function
Rate output, is directly realized by customer power supply；Current transformer, the windings in series with power output unit, for monitoring load electricity
Stream；Voltage measurement unit, and first component mutual inductance, and the series compensation winding on the winding of voltage measurement unit, compensative winding
It is in parallel with Current Mutual Inductance, by the compensating impedance of certain numerical value in parallel on load current, and the compensating impedance is connected on electricity
It presses and carries out error compensation on the circuit of metering units winding, realize power from 0 to when exporting at full capacity, 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.As shown in Figure 1, the power supply type voltage transformer with voltage measurement function that embodiments of the present invention provide, packet
It includes: the first component, for receiving first voltage from voltage input end；Power output unit, with first component mutual inductance, output voltage
It is directly realized by with realizing power output to customer power supply for 220V；Current transformer, the windings in series with power output unit,
For monitoring load current；Voltage measurement unit, the primary side mutual inductance with the power supply type voltage transformer, and in voltage measurement
Series compensation winding on the winding of unit, compensative winding is in parallel with Current Mutual Inductance, passes through certain numerical value in parallel on load current
Compensating impedance, and the compensating impedance is connected on the circuit of voltage measurement unit winding and carries out error compensation, realize function
For rate from 0 to when exporting at full capacity, error meets metering grade error limit requirement.What embodiments of the present invention provided has electricity
Press the power supply type voltage transformer 100 of function of measuring, comprising: the first component 101, power output unit 102, voltage measurement unit
103, current transformer 104 and compensating impedance 105.Preferably, the first component 101, connect with voltage input end, for from
The voltage input end receives first voltage.
Preferably, the power output unit 102 is used to export to voltage output end with 101 mutual inductance of the first component
Second voltage, to realize power output.
Preferably, wherein the second voltage is the 220V power-frequency voltage for being supplied to user.
Preferably, the voltage measurement unit 103 is obtained with 101 mutual inductance of the first component for realizing voltage measurement
Take tertiary voltage.
Preferably, the current transformer 104, the power output windings in series with the power output unit 102, is used for
Load current is measured.
Preferably, the compensating impedance 105, the voltage measurement windings in series with the power output unit 102, and with institute
It is in parallel to state current transformer 104, for when customer charge changes, compensating load current in voltage measurement unit 103
The pressure drop generated on primary side and secondary side leakage reactance compensates the error of voltage measurement 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, it is compensative winding that voltage measurement PT, which is loaded, and there are two two for power supply type voltage transformer tool
Secondary side winding, comprising: power output winding, output voltage 220V can be directly realized by customer power supply；Voltage measurement around
Group, output voltage are/100/, when customer charge variation, the load error of voltage measurement power supply type voltage transformer with
The variation of load current and change, by using no-load error compensation and load error compensation method, realize voltage measurement around
The error compensation of group.
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, and CT is load
The current transformer of current monitoring, Z are compensating impedance, and 1a1n is voltage measurement terminal.When the connect load of an changes,
Due to the variation of load current, the error of 1a1n can change, by the loop, compensating Z concatenation due to load current
The pressure drop generated on the primary side and secondary side leakage reactance of voltage measurement unit can be realized simultaneously to realize the compensation of error
The function of power output and voltage measurement.
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, second voltage is exported to voltage output end in step 402 power output unit, to realize power output.
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, for receiving first voltage from the voltage input end；
Power output unit is used to export second voltage to voltage output end, to realize that power is defeated with the first component mutual inductance
Out；
Voltage measurement unit obtains tertiary voltage with the first component mutual inductance for realizing voltage measurement；
Current transformer, the power output windings in series with the power output unit, for being measured to load current；
Compensating impedance, the voltage measurement windings in series with the power output unit, and it is in parallel with the current transformer, it is used for
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 exports second voltage to voltage output end, to realize power output；
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 |
|---|---|---|---|
| CN201811216310.1A CN109212293B (en) | 2018-10-18 | 2018-10-18 | Power supply type voltage transformer with voltage metering function and use method |
| 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 |
|---|---|---|---|
| CN201811216310.1A CN109212293B (en) | 2018-10-18 | 2018-10-18 | Power supply type voltage transformer with voltage metering function and use method |
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| Publication Number | Publication Date |
|---|---|
| CN109212293A true CN109212293A (en) | 2019-01-15 |
| CN109212293B CN109212293B (en) | 2021-04-02 |
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| CN201811216310.1A Active CN109212293B (en) | 2018-10-18 | 2018-10-18 | Power supply type voltage transformer with voltage metering function and use method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993273A (en) * | 2019-11-05 | 2020-04-10 | 中国电力科学研究院有限公司 | Two-stage excitation high-voltage proportion standard device and error compensation method |
| 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 |
| CN112259347A (en) * | 2020-12-21 | 2021-01-22 | 中国电力科学研究院有限公司 | Power supply type voltage transformer and electric energy metering device |
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