CN107064601A - A kind of electronic type voltage transformer - Google Patents
A kind of electronic type voltage transformer Download PDFInfo
- Publication number
- CN107064601A CN107064601A CN201710164815.7A CN201710164815A CN107064601A CN 107064601 A CN107064601 A CN 107064601A CN 201710164815 A CN201710164815 A CN 201710164815A CN 107064601 A CN107064601 A CN 107064601A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electronic type
- voltage
- voltage transformer
- piezoresistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005611 electricity Effects 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005350 ferromagnetic resonance Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- 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
- G01R15/04—Voltage dividers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to transformer technical field, particularly a kind of electronic type voltage transformer, the circuit structure constituted including three series resistances and phase compensation electric capacity C, three series resistances include the high-tension resistive R1 of the top, it is connected to the middle piezoresistance R2 of high-tension resistive lower end, and the low resistance R3 of middle piezoresistance R2 lower ends is connected to, the phase compensation electric capacity C is arranged in parallel on middle piezoresistance R2, and voltage secondary singal lead-out wire is arranged in parallel on low resistance R3；The resistance of the high-tension resistive R1 is between 10M Ω 200M Ω, and medium pressure resistance R2 resistance is between 100k Ω 10M Ω, and the resistance of the low resistance R3 is between the k Ω of 1k Ω 100, and the capacitance of the phase compensation electric capacity C is between 0.1nF~50nF.
Description
Technical field
The present invention relates to transformer technical field, more particularly to a kind of electronic type voltage transformer.
Background technology
In high-tension measurement, monitoring and protection, replace tradition frequently with a kind of electronic type voltage transformer of electric resistance partial pressure
Electromagnetic potential transformer, it have small volume, it is lightweight, unsaturated, without ferromagnetic resonance many advantages, such as.
In the prior art using the electronic type voltage transformer of electric resistance partial pressure as shown in figure 1, resistance R1 and R2 series connection, electric capacity
C is connected in parallel on resistance R2, and voltage secondary singal lead-out wire is also connected in parallel on resistance R2, and such a structure is present much incompletely
Side, such as phase deviation, be easily disturbed, stability difference etc., its phase deviation figure is as shown in Fig. 2 output voltageLag behind defeated
Enter voltageOne angle [alpha], this is caused by resitstance voltage divider itself distribution capacity characteristic.
The high-voltage electronic type voltage transformer of all use electric resistance partial pressures, his core parts divider resistance is inevitably
Influenceed by distributed constant, these distributed constants include：Distribution capacity between divider height pressure arm resistance, divider body
Longitudinal electric capacity, high-pressure side including high-field electrode to the stray capacitance of divider body, divider body respectively to high-pressure side,
Stray capacitance over the ground, the stray capacitance of divider running environment to external world.The presence of exactly these distributed constants makes divider
Technical parameter become complexity, the high pressure of application is no longer uniformly landed along the total length of divider body, axial current potential
No longer constant gradient is uniformly distributed, so as to cause reality output to there is amplitude and phase error with theoretical value.
The content of the invention
Not enough for more than, the present invention adds parallel capacitive compensation phase structure by using three resistant series, so as to reduce
The phase deviation of electronic mutual inductor as caused by resitstance voltage divider distribution capacity, improves electronic type voltage transformer measurement essence
Degree.
The technical scheme is that：
A kind of electronic type voltage transformer, it is characterised in that constituted including three series resistances and phase compensation electric capacity C
Circuit structure, three series resistances include the high-tension resistive R1 of the top, are connected to the middle piezoresistance of high-tension resistive lower end
R2, and the low resistance R3 of middle piezoresistance R2 lower ends is connected to, the phase compensation electric capacity C is arranged in parallel in middle piezoresistance R2
On, voltage secondary singal lead-out wire is arranged in parallel on low resistance R3；The resistance of the high-tension resistive R1 is in 10M Ω -200M
Between Ω, medium pressure resistance R2 resistance is between 100k Ω -10M Ω, and the resistance of the low resistance R3 is in 1k Ω -100k
Between Ω, the capacitance of the phase compensation electric capacity C is between 0.1nF~50nF.
The electronic type voltage transformer is applied to the circuit that input voltage is 10-35kV.
The electronic type voltage transformer is applied to the circuit that input voltage is 10kV.
The voltage loaded in the circuit on piezoresistance R2 is no more than 2000V.
10mA is less than by the electric current of three series resistances in the circuit.
In the circuit by the electric current of three series resistances between 0.05-1mA.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of prior art electronic type voltage transformer；
Fig. 2 is the phasor diagram of prior art output voltage and input voltage；
Fig. 3 is the circuit connection diagram of electronic type voltage transformer of the present invention；
Fig. 4 is the phasor diagram of output voltage of the present invention and input voltage.
Embodiment
The technique effect of the design of the present invention, concrete structure and generation is made into one below with reference to accompanying drawing and experimental data
Step explanation, to be fully understood from the purpose of the present invention, feature and effect.
With reference to Fig. 1, in the electronic type voltage transformer circuit diagram of prior art, resistance R1 and R2 series connection, electric capacity C (moulds
Intend the distribution capacity spuious over the ground of resitstance voltage divider) it is connected in parallel on resistance R2, voltage secondary singal lead-out wire is also connected in parallel on resistance
On R2；Input voltage isVoltage on resistance R1 isVoltage (i.e. output voltage) on resistance R2 isPass through resistance
R1 electric current isCompare output voltageWith input voltagePhase relation.
It is as follows using phasor approach calculating process：
(wherein 2*f=100)
ZC=-jXC
By vector mode
Therefore
Order
Therefore
So, output voltageDelayed input voltageOne angle
With reference to Fig. 2, voltagePhasor relation figure, ifInput voltageIn first quartile
And and output voltageAngle is α, i.e. output voltageDelayed input voltageOne angle [alpha].
Technical scheme is as shown in figure 3, high-tension resistive R1, middle piezoresistance R2, low resistance R3 connect (with it simultaneously
The divider of connection over the ground do not consider first by stray capacitance), electric capacity C (compensating electric capacity) is connected in parallel on middle piezoresistance R2, and voltage is secondary
Signal lead-out wire is connected in parallel on resistance R3；Input voltage isVoltage on resistance R1 isVoltage on resistance R2 is
Voltage (i.e. output voltage) on resistance R3 isElectric current by resistance R1 isCompare output voltageWith input voltagePhase relation.
It is as follows using phasor approach calculating process：
By vector mode
Order
Therefore
So, voltageAdvanced input voltageOne angle
With reference to Fig. 4, voltagePhasor relation figure, ifInput voltageOutput electricity
PressureIt is in first quartile, Top and angle between the two is α, i.e. output voltageAdvanced input voltageOne
Individual angle [alpha].
In summary, for two resistive technologies schemes, due to the presence of divider stray capacitance over the ground, output electricity can be caused
Delayed input voltage is pressed, phase difference is produced, causes measurement error.Using the three resistive technologies schemes of the present invention, by middle pressure
Install compensating electric capacity on resistance additional, output voltage can be madeAdvanced input voltageOne angle [alpha], so as to make up divider over the ground
Stray capacitance produces the defect of delayed some angle of input voltage of output voltage so that between output voltage and input voltage
Phase reaches unanimity.In three resistive technologies schemes, as long as choosing suitable compensating electric capacity, the advanced effect of phase for producing it
The divider delayed phase effect that stray capacitance is produced over the ground is offset, there will be no phase difference between output voltage and input voltage
.
The electronic type voltage transformer structure of the present invention can be used for 10-35kV circuit, be preferred for 10kV circuit.
In 10kV circuit, high-tension resistive R1, middle piezoresistance R2, low resistance R3 apolegamy should be ensured that：
1) voltage loaded on piezoresistance R2 is no more than 2000V；
2) 10mA, preferably 0.05-10mA are less than by the electric current of three resistance.If electric current is too big, longtime running can make electricity
Resistance produces superheating phenomenon, causes properties of product to decline, has a strong impact on measurement accuracy.
It is set to be preferably provided with scheme as follows：
1) high-tension resistive R1 resistance is between 10M Ω -200M Ω；
2) piezoresistance R2 resistance is between 100k Ω -10M Ω in；
3) low resistance R3 resistance is between 1k Ω -100k Ω；
4) phase compensation electric capacity C capacitance is between 0.1nF~50nF.
Illustrate the effect that the technical scheme of invention is reached below by way of three embodiments.
Embodiment one：R1=50M Ω, R2=1M Ω, R3=16.5k Ω, electric capacity C=2nF, input voltage
If
It can be drawn by calculating, output voltageAdvanced input voltageAngle is 0.51 °, so as to make up divider over the ground
Stray capacitance produces the defect of the delayed input voltage respective angles of output voltage.
Pass through high-tension resistive R1 and low resistance R3 electric current
It is carried in the voltage on piezoresistance R2
Pass through middle piezoresistance R2 electric current
So above numerical value, which is chosen, meets system requirements.
Embodiment two：R1=50M Ω, R2=1M Ω, R3=16.5k Ω, electric capacity C=1nF, input voltage
If
It can be drawn by calculating, output voltageAdvanced input voltageAngle is 0.33 °, so as to make up divider over the ground
Stray capacitance produces the defect of the delayed input voltage respective angles of output voltage.
Pass through high-tension resistive R1 and low resistance R3 electric current
It is carried in the voltage on piezoresistance R2
Pass through middle piezoresistance R2 electric current
So above numerical value, which is chosen, meets system requirements.
Embodiment three：R1=50M Ω, R2=2M Ω, R3=16.5k Ω, electric capacity C=1nF, input voltage
If
It can be drawn by calculating, output voltageAdvanced input voltageAngle is 1 °, so that it is miscellaneous over the ground to make up divider
Spurious capacitance produces the defect of the delayed input voltage respective angles of output voltage.
Pass through high-tension resistive R1 and low resistance R3 electric current
It is carried in the voltage on piezoresistance R2
Pass through middle piezoresistance R2 electric current
Above numerical value, which is chosen, meets system requirements.
It can be calculated more than, the circuit structure of electronic type voltage transformer of the invention, the phase of output voltage surpasses
It is preceding in input voltage phase, efficiently solve the defect of output voltage delayed phase in the prior art, improve electronic type voltage
The measurement accuracy of transformer, with significant progressive.
Disclosed above is only embodiments of the invention, and still, the present invention is not limited to this, the technology of any this area
What personnel can think change should all fall into protection scope of the present invention.
Claims (6)
1. a kind of electronic type voltage transformer, it is characterised in that the electricity constituted including three series resistances and phase compensation electric capacity C
Line structure, three series resistances include the high-tension resistive R1 of the top, are connected to the middle piezoresistance R2 of high-tension resistive lower end,
And the low resistance R3 of middle piezoresistance R2 lower ends is connected to, the phase compensation electric capacity C is arranged in parallel on middle piezoresistance R2, electric
Pressure secondary singal lead-out wire is arranged in parallel on low resistance R3；The resistance of the high-tension resistive R1 10M Ω -200M Ω it
Between, medium pressure resistance R2 resistance is between 100k Ω -10M Ω, and the resistance of the low resistance R3 is in 1k Ω -100 k Ω
Between, the capacitance of the phase compensation electric capacity C is between 0.1nF~50nF.
2. electronic type voltage transformer according to claim 1, it is characterised in that the electronic type voltage transformer application
In the circuit that input voltage is 10-35kV.
3. electronic type voltage transformer according to claim 2, it is characterised in that the electronic type voltage transformer application
In the circuit that input voltage is 10kV.
4. electronic type voltage transformer according to claim 3, it is characterised in that add in the circuit on piezoresistance R2
The voltage of load is no more than 2000V.
5. electronic type voltage transformer according to claim 3, it is characterised in that pass through three series electricals in the circuit
The electric current of resistance is less than 10mA.
6. electronic type voltage transformer according to claim 5, it is characterised in that pass through three series electricals in the circuit
The electric current of resistance is between 0.05-1mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164815.7A CN107064601A (en) | 2017-03-20 | 2017-03-20 | A kind of electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164815.7A CN107064601A (en) | 2017-03-20 | 2017-03-20 | A kind of electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107064601A true CN107064601A (en) | 2017-08-18 |
Family
ID=59620100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164815.7A Pending CN107064601A (en) | 2017-03-20 | 2017-03-20 | A kind of electronic type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107064601A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089143A (en) * | 2017-12-29 | 2018-05-29 | 深圳市锐能微科技有限公司 | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN111693755A (en) * | 2020-05-21 | 2020-09-22 | 西安交通大学 | Voltage detection circuit for high-voltage SiC MOSFET |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006039976A1 (en) * | 2004-10-16 | 2006-04-20 | Duromer Kunststoffverarbeitungs- Gmbh | Voltage divider |
| CN101520471A (en) * | 2009-03-30 | 2009-09-02 | 中国科学院等离子体物理研究所 | Novel DC pulsed attenuator |
| CN101762733A (en) * | 2010-01-08 | 2010-06-30 | 中国电力科学研究院 | Design method of high-impedance broadband high-voltage voltage divider |
| CN101901681A (en) * | 2009-05-26 | 2010-12-01 | 廊坊高山电子科技有限公司 | 10 kV passive electronic voltage transformer |
| CN204256014U (en) * | 2014-09-26 | 2015-04-08 | 国家电网公司 | A kind of voltage divider and bleeder circuit thereof |
| CN206583958U (en) * | 2017-03-20 | 2017-10-24 | 杭州零尔电力科技有限公司 | A kind of electronic type voltage transformer |
-
2017
- 2017-03-20 CN CN201710164815.7A patent/CN107064601A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006039976A1 (en) * | 2004-10-16 | 2006-04-20 | Duromer Kunststoffverarbeitungs- Gmbh | Voltage divider |
| CN101520471A (en) * | 2009-03-30 | 2009-09-02 | 中国科学院等离子体物理研究所 | Novel DC pulsed attenuator |
| CN101901681A (en) * | 2009-05-26 | 2010-12-01 | 廊坊高山电子科技有限公司 | 10 kV passive electronic voltage transformer |
| CN101762733A (en) * | 2010-01-08 | 2010-06-30 | 中国电力科学研究院 | Design method of high-impedance broadband high-voltage voltage divider |
| CN204256014U (en) * | 2014-09-26 | 2015-04-08 | 国家电网公司 | A kind of voltage divider and bleeder circuit thereof |
| CN206583958U (en) * | 2017-03-20 | 2017-10-24 | 杭州零尔电力科技有限公司 | A kind of electronic type voltage transformer |
Non-Patent Citations (2)
| Title |
|---|
| 叶磊: "基于电阻分压的10kV电子式电压互感器的研究" * |
| 王佳颖: "基于电阻分压原理的电子式电压互感器研究" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089143A (en) * | 2017-12-29 | 2018-05-29 | 深圳市锐能微科技有限公司 | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter |
| CN108089143B (en) * | 2017-12-29 | 2024-01-12 | 深圳市锐能微科技有限公司 | Detection circuit and method for voltage dividing circuit parameters and electric energy metering chip |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN111693755A (en) * | 2020-05-21 | 2020-09-22 | 西安交通大学 | Voltage detection circuit for high-voltage SiC MOSFET |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206583958U (en) | A kind of electronic type voltage transformer | |
| CN107064601A (en) | A kind of electronic type voltage transformer | |
| CN107037312A (en) | A kind of Transformer Winding Building of Simulation Model method for frequency sweep impedance method | |
| CN103575951B (en) | A kind of coupling capacitive divider of band electric potential gradient shielding | |
| CN105259489B (en) | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method | |
| CN101424713A (en) | Three-phase four-wire high voltage energy measuring method and device | |
| CN201319309Y (en) | Electronic voltage transformer | |
| CN103969486B (en) | Grading ring for limiting transient voltage and current of capacitor voltage transformer | |
| CN106646163A (en) | Lightning impulse testing circuit and lightning impulse testing method used for capacitive composite insulation busbar system | |
| CN106053909B (en) | Electric resistance partial pressure type three-phase combination voltage mutual inductor with residual voltage output | |
| Cui et al. | High‐frequency resonance suppression of high‐speed railways in China | |
| CN106932648B (en) | Three-phase overhead transmission line phase voltage method for self-calibrating based on shunt capacitance | |
| CN205027865U (en) | Dry -type air -core reactor interturn insulation electrical ageing test system | |
| CN104237593A (en) | Voltage divider, voltage division circuit thereof and voltage division control method | |
| CN206235706U (en) | A kind of high voltage reactor scene partial discharge and overpressure resistance detecting device | |
| CN205643468U (en) | Electronic voltage transformer suitable for smart power grid power quality detection | |
| CN110412328A (en) | A kind of combination electronic mutual inductor and measuring system for distribution transformer | |
| CN206096222U (en) | Isolated neutral system capacitance current testing arrangement | |
| CN206038833U (en) | GIS transfers with frequency homophase and feels pressure resistance test installation | |
| CN110470899B (en) | Method for measuring capacitance current of power distribution network based on membership function | |
| CN205609341U (en) | Harmonic elimination formula voltage transformer | |
| CN201378184Y (en) | Triphase four-wire system high voltage electric energy meter | |
| CN108427022A (en) | The detuning protective device of high-pressure series Resonance Voltage Withstand Test | |
| CN206321684U (en) | A kind of three-phase electronic voltage mutual inductor | |
| CN204065202U (en) | A kind of Novel pillar formula voltage transformer (VT) based on coaxial small capacitances Multilevel partial-pressure technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170818 |