CN202453402U - Electronic type voltage transformer based on self-excitation source - Google Patents
Electronic type voltage transformer based on self-excitation source Download PDFInfo
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- CN202453402U CN202453402U CN2012200835125U CN201220083512U CN202453402U CN 202453402 U CN202453402 U CN 202453402U CN 2012200835125 U CN2012200835125 U CN 2012200835125U CN 201220083512 U CN201220083512 U CN 201220083512U CN 202453402 U CN202453402 U CN 202453402U
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Abstract
An electronic type voltage transformer based on a self-excitation source comprises an electricity obtaining module, a signal acquiring module and a signal conditioning module. The electricity obtaining module and the signal acquiring module are connected with primary voltage, the electricity obtaining module is provided with a coaxial capacitor on a concentric high-voltage lead, and both the signal acquiring module and the coaxial capacitor are connected with the signal conditioning module. The requirement for 2-Momega input impedance of an instrument and a meter is met when an existing electronic mutual inductor is matched with the instrument and the meter, and the problem that the precision of the electronic mutual inductor is affected when the impedance of the instrument and the meter changes is solved.
Description
Technical field
The utility model relates to a kind of electric equipment, relates in particular to a kind of electronic type voltage transformer based on the self-excitation source.
Background technology
Build medium-term and long-term development plan according to national grid; The optical, mechanical and electronic integration equipment of the intelligent development level of high-voltage switch gear can monitored, diagnose and protect, promote to exploitation for a long time automatically to system running state, be the march toward an urgent demands of robotization of urban and rural power grids.Accelerate development shows urgent especially as the electronic mutual inductor of an electric quantity acquisition unit of system, and this also is the needs of Automation of Electric Systems, digital development.And electronic mutual inductor is to satisfy modern power systems mesohigh electric equipment to one of intellectuality, modularization, miniaturization, multi-functional, non-maintaining direction development key equipment.
Because electronic type voltage transformer does not contain iron core, can not produce ferroresonance, electronic type voltage transformer is increasing to be applied in the newly-built digital transformer substation.But electronic type voltage transformer has the input impedance requirement of 2M Ω to the subsequent instrumentation instrument, has hindered the development of follow-up digitizer instruments and meters and electronic type voltage transformer interface so significantly.And the input impedance variation of instrument and meter can cause the decline of electronic type voltage transformer measuring accuracy.
Therefore, the technical scheme of a kind of new electronic type voltage transformer structure of current needs solves the problems referred to above
Summary of the invention
The utility model technical matters to be solved provides a kind of electronic type voltage transformer based on the self-excitation source; Solved existing electronic mutual inductor and needed the input impedance requirement of 2M Ω arranged with instrument and meter when supporting, and when the instrument and meter impedance variations, influenced the problem of electronic type voltage transformer precision instrument and meter.
In order to address the above problem; The utility model provides a kind of electronic type voltage transformer based on the self-excitation source; Comprise: electricity-fetching module, signal acquisition module and signal condition module; Electricity-fetching module is connected primary voltage with signal acquisition module, and electricity-fetching module is provided with a coaxial capacitor on concentric high-voltage connection, and signal acquisition module all is connected said signal condition module with ganged condenser.
Further; Above-mentioned electronic type voltage transformer also can comprise: said signal acquisition module comprises resitstance voltage divider, high pressure compensation guarded electrode and low-voltage compensation guarded electrode and overvoltage protection, and wherein overvoltage protection is built in this resitstance voltage divider.
Further, above-mentioned electronic type voltage transformer also can comprise: said resitstance voltage divider comprises high-voltage arm resistance and low-voltage arm resistance.
Further, above-mentioned electronic type voltage transformer can comprise that also one is arranged at the shielded metal box in it, this shielded metal box ground connection with said signal condition module.
Compared with prior art; The electronic type voltage transformer of the utility model has solved existing electronic mutual inductor in the input impedance requirement that needs have instrument and meter 2M Ω with instrument and meter when supporting; And when the instrument and meter impedance variations, can influence the problem of electronic type voltage transformer precision.The electronic type voltage transformer of the utility model is to subsequent instrumentation instrument input impedance no requirement (NR), and when the instrument and meter impedance variations, do not influence the measuring accuracy of electronic type voltage transformer.Its technical essential is: electricity-fetching module is by the ganged condenser power taking, and acquisition module is made by the precision resister voltage divider, and both are connected to instrument and meter through Shielded Twisted Pair after signal is offered the signal condition resume module.Advantages such as this product has the measuring accuracy height, and response speed is fast, and the linearity is good have reduced each other because the measuring error that magnetic interference causes has broad application prospects simultaneously greatly.
Description of drawings
Fig. 1 is the structural representation of electronic type voltage transformer based on the self-excitation source of the utility model;
Fig. 2 is based on the cross sectional representation of the electronic type voltage transformer in self-excitation source in the instance of the utility model;
Fig. 3 is the stereographic map of electronic type voltage transformer based on the self-excitation source of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
As shown in Figure 1; The electronic type voltage transformer T based on the self-excitation source of the utility model; Comprise: electricity-fetching module 101, signal acquisition module 102 and signal condition module 103; Electricity-fetching module 101 is connected primary voltage V with signal acquisition module 102, and electricity-fetching module 101 is provided with a coaxial capacitor on concentric high-voltage connection, and ganged condenser connects signal condition module 103 (electricity-fetching module 101 carries out power supply and provides through send to signal condition module 103 after treatment from the ganged condenser power taking); Signal acquisition module 102 connects said signal condition module 103, and the final adjustment signal of primary voltage V is by 103 outputs of signal condition module.
In the said electricity-fetching module, ganged condenser can adopt die casting, is carrying out accurate machine work after the demoulding, has guaranteed the precision and the consistance of ganged condenser.
Said signal acquisition module also can comprise resitstance voltage divider, high pressure compensation guarded electrode and low-voltage compensation guarded electrode and overvoltage protection, and wherein overvoltage protection is built in this resitstance voltage divider.
Said resitstance voltage divider also can comprise high-voltage arm resistance and low-voltage arm resistance.
Electronic type voltage transformer based on the self-excitation source can comprise that also one is arranged at the shielded metal box in it with the signal condition module, this shielded metal box ground connection, and this shielded metal box is used to shield external interference, improves measuring accuracy.The function of said signal condition module comprises filtering, amplitude modulation, phase modulation, impedance conversion.
As shown in Figure 2: electricity-fetching module induces alternating voltage by ganged condenser 4 through high-voltage connection 3 in the mutual inductor of an instance of the utility model, through giving the signal condition module of mutual inductor behind the rectifying and wave-filtering available direct supply is provided.The signal acquisition module of electronic type voltage transformer is made up of 5,6 and 7 three parts.Wherein 5 is the high pressure compensation guarded electrode, and 6 is the low-voltage compensation guarded electrode, and 7 is resitstance voltage divider, and wherein overvoltage protection is built in the resitstance voltage divider.The system voltage signal is transformed to the small voltage signal of 0-5V through signal acquisition module with the primary voltage of system, sends to the signal condition module.Signal carries out secondary filtering in signal condition module 103, amplitude modulation, and phase modulation amplifies, impedance conversion, final output is exported through lead-out terminal 9.Among Fig. 2,1 is epoxy resin, and 2 is the high pressure inserts, and 8 is the ground connection inserts.
The electricity-fetching module of the electronic type voltage transformer of the utility model is obtained ac voltage signal in system, power supply is provided for the signal condition module through rectifying and wave-filtering.Signal acquisition module is utilized the electric resistance partial pressure principle, records the system voltage amount and sends the signal condition module to.The signal condition module is carried out filtering with initialize signal, and the adjustment amplitude after the conditioning phase place, is amplified through amplifier, carries out impedance conversion, final output.This output signal does not have the impedance requirement to instrument and meter, when the instrument and meter impedance variations, mutual inductor precision own is not had influence.(the power supply collecting part adopts the ganged condenser power taking; The ac voltage signal of obtaining passes through rectifying and wave-filtering; Give mutual inductor built-in signal condition unit power supply, the signal of electronic type voltage transformer makes the easy interface of subsequent instrumentation instrument through the output of signal condition unit).
Fig. 3 is the stereographic map of electronic type voltage transformer based on the self-excitation source of the utility model.
The utility model is through actual use test, and precision satisfies 0.2 grade of requirement in the GB.The electronic devices and components such as resistance, electric capacity and amplifier that the utility model uses all are to use technical grade product, and temperature applicable range is very big, and the environment for use temperature can cover China overwhelming majority area, temperature range-45 ℃-85 ℃.
The electronic type voltage transformer of the utility model has solved existing electronic mutual inductor and has needed to instrument and meter the input impedance requirement of 2M Ω arranged with instrument and meter when supporting, and when the instrument and meter impedance variations, can influence the electronic type voltage transformer precision.The electronic type voltage transformer of the utility model is to subsequent instrumentation instrument input impedance no requirement (NR), and when the instrument and meter impedance variations, do not influence the measuring accuracy of electronic type voltage transformer.Its technical essential is: electricity-fetching module is by the ganged condenser power taking, and acquisition module is made by the precision resister voltage divider, and both are connected to instrument and meter through Shielded Twisted Pair after signal is offered the signal condition resume module.Advantages such as this product has the measuring accuracy height, and response speed is fast, and the linearity is good have reduced each other because the measuring error that magnetic interference causes has broad application prospects simultaneously greatly.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Anyly be familiar with this technological people in the technical scope that the utility model disclosed, the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (4)
- One kind based on the self-excitation source electronic type voltage transformer; It is characterized in that; Comprise: electricity-fetching module, signal acquisition module and signal condition module; Electricity-fetching module is connected primary voltage with signal acquisition module, and electricity-fetching module is provided with a coaxial capacitor on concentric high-voltage connection, and signal acquisition module all is connected said signal condition module with ganged condenser.
- 2. electronic type voltage transformer as claimed in claim 1; It is characterized in that; Said signal acquisition module comprises resitstance voltage divider, high pressure compensation guarded electrode and low-voltage compensation guarded electrode and overvoltage protection, and wherein overvoltage protection is built in this resitstance voltage divider.
- 3. electronic type voltage transformer as claimed in claim 2 is characterized in that said resitstance voltage divider comprises high-voltage arm resistance and low-voltage arm resistance.
- 4. electronic type voltage transformer as claimed in claim 1 is characterized in that, comprises that also one is arranged at the shielded metal box in it, this shielded metal box ground connection with said signal condition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200835125U CN202453402U (en) | 2012-03-07 | 2012-03-07 | Electronic type voltage transformer based on self-excitation source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200835125U CN202453402U (en) | 2012-03-07 | 2012-03-07 | Electronic type voltage transformer based on self-excitation source |
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| Publication Number | Publication Date |
|---|---|
| CN202453402U true CN202453402U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200835125U Expired - Fee Related CN202453402U (en) | 2012-03-07 | 2012-03-07 | Electronic type voltage transformer based on self-excitation source |
Country Status (1)
| Country | Link |
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| CN (1) | CN202453402U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090141A (en) * | 2014-07-03 | 2014-10-08 | 北京瑞奇恩互感器设备有限公司 | Electronic type voltage transformer and zero-sequence electronic type voltage transformer |
| CN109061267A (en) * | 2018-09-28 | 2018-12-21 | 北京瑞奇恩互感器设备有限公司 | Take electric type electronic voltage transducer |
-
2012
- 2012-03-07 CN CN2012200835125U patent/CN202453402U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090141A (en) * | 2014-07-03 | 2014-10-08 | 北京瑞奇恩互感器设备有限公司 | Electronic type voltage transformer and zero-sequence electronic type voltage transformer |
| CN109061267A (en) * | 2018-09-28 | 2018-12-21 | 北京瑞奇恩互感器设备有限公司 | Take electric type electronic voltage transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20160307 |
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| CF01 | Termination of patent right due to non-payment of annual fee |