CN107271747A - A kind of optical voltage transformer improves device - Google Patents
A kind of optical voltage transformer improves device Download PDFInfo
- Publication number
- CN107271747A CN107271747A CN201710453938.2A CN201710453938A CN107271747A CN 107271747 A CN107271747 A CN 107271747A CN 201710453938 A CN201710453938 A CN 201710453938A CN 107271747 A CN107271747 A CN 107271747A
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- Prior art keywords
- voltage transformer
- polarization
- converter
- improves device
- dsp
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- 230000003287 optical effect Effects 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 29
- 230000010287 polarization Effects 0.000 claims abstract description 28
- 238000012216 screening Methods 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Classifications
-
- 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
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention belongs to electronic type voltage transformer technical field in power system, especially a kind of optical voltage transformer improves device, and specifically a kind of electronic type voltage transformer based on optical fiber sensing technology improves device.The invention mainly comprises screening arrangement, sensing head, polarization maintaining optical fibre and secondary cabinet；Sensing head is placed in screening arrangement, is connected with polarization maintaining optical fibre；The other end of polarization maintaining optical fibre is connected with the light path part in secondary cabinet, and light path part is connected by photodetector with the circuit part in secondary cabinet.The present invention has that good insulation preformance, anti-electromagnetic interference capability be strong, small volume, lightweight and safe distinguishing feature, efficiently solve the insulation technology bottleneck between voltage transformer high-pressure side and low-pressure side, also have simultaneously simple in construction, with low cost the advantages of, widely popularize and apply suitable for power system, with certain Social benefit and economic benefit.
Description
Technical field
The invention belongs to electronic type voltage transformer technical field in power system, especially a kind of optical voltage transformer
Device is improved, specifically a kind of electronic type voltage transformer based on optical fiber sensing technology improves device.
Background technology
With the raising of voltage class of electric power system, traditional electromagnetic potential transformer is limited because of its own sensor mechanism
And show such as insulation system it is complicated, there is magnetic saturation phenomenon be difficult to overcome the problem of, in following voltage levels electric power
There are numerous technical bottlenecks in system.Therefore, those skilled in the art be directed to above-mentioned technical problem, actively develop technological improvement with
The research work of renewal.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention proposes that a kind of optical voltage transformer improves device, specifically
It is that a kind of electronic type voltage transformer based on optical fiber sensing technology improves device.It is a kind of with insulation its purpose is to provide
Performance is good, anti-electromagnetic interference capability is strong, small volume, a kind of lightweight and safe optical voltage transformer improve dress
Put.
In order to realize foregoing invention purpose, the technical solution adopted for the present invention to solve the technical problems is：
A kind of optical voltage transformer improves device, mainly including screening arrangement, sensing head, polarization maintaining optical fibre and secondary cabinet；
Sensing head is placed in screening arrangement, is connected with polarization maintaining optical fibre；The other end of polarization maintaining optical fibre and the light path part in secondary cabinet
It is connected, light path part is connected by photodetector with the circuit part in secondary cabinet.
The sensing head is vacantly placed in screening arrangement inner space.
Filled with insulation SF6 gases can be played a part of in the screening arrangement.
The screening arrangement uses metal shell, and size is 40cm × 30cm × 30cm, wall thickness about 1.5cm.
The sensing head collimates polarization apparatus and electro-optic crystal by faraday and constituted, electric crystal size be 5mm × 5mm ×
10mm。
The polarization maintaining optical fibre uses Xi-Ri brand 1310nm wave band FC/APC polarization maintaining optical fibres.
The light path part mainly includes light source, circulator, Y waveguide modulators, polarization-maintaining coupler and photodetector；
Wherein circulator receives external light source, and one end of circulator is connected with photodetector, and the other end and the Y waveguide of circulator are modulated
Device is connected；The other end of Y waveguide modulator connects polarization-maintaining coupler, and polarization-maintaining coupler passes through polarization maintaining optical fibre and sensor phase
Connection.
The light source uses super-radiance light emitting diode (SLD), centre wavelength 1310nm；Circulator is protected using 1310 models
Inclined optical fiber circulator；Y waveguide modulator PANWOO brand MIOC type modulators；Polarization-maintaining coupler uses U.S. fairchild
MOC8050M type fiber couplers；Photodetector uses ALPHALAS silicon photodetectors.
The circuit part mainly includes photodetector, A/D converter, digital signal processing unit, D/A switch
Device and respective drive circuit；Wherein photodetector one end connects the circulator of light path part, and the other end is exported to analog/digital conversion
Device；A/D converter is exported to DSP inputs, and DSP outputs connect FPGA inputs, and FPGA output point two-way meets drive circuit B all the way,
Another road connects D/A converter, and D/A converter meets drive circuit A；Drive circuit A and drive circuit B with light path part
Y waveguide modulators are connected.
The A/D converter uses ADC0809 chips, is connected with digital signal processing unit；Signal processing unit by
Digital signal processor DSP and programmable gate array FPGA composition, the DSP inputs represent DSP input interface, and DSP is used
TMS320 models.FPGA input represents FPGA input interface, and FPGA uses EPCS4SI8N models, DSP and FPGA's
Input port delivery outlet is in parallel respectively, while input port connects A/D converter, delivery outlet connection D/A converter；D/A turns
Parallel operation uses DAC0832 chips, delivery outlet connection drive circuit；Drive circuit completes circuit signal using LM324 drive circuits
Output.
The beneficial effects of the invention are as follows：
The present invention by the electronic type voltage transformer based on optical fiber sensing technology due to having carried out Curve guide impeller so that present invention tool
Have that good insulation preformance, anti-electromagnetic interference capability be strong, small volume, lightweight and safe distinguishing feature, relative to existing
Technology is compared, and can greatly improve operating efficiency, and the accurate performance worked.Efficiently solve voltage transformer high-pressure side and
Insulation technology bottleneck between low-pressure side, while also the advantages of with low cost, being pushed greatly suitable for power system with simple in construction
Wide and application, with certain Social benefit and economic benefit.
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further detailed explanation, but not by the present embodiment institute
Limit.
Brief description of the drawings
Fig. 1 is present system schematic diagram；
Fig. 2 is the structural representation of light path part in the present invention；
Fig. 3 is the structural representation of circuit part in the present invention.
In figure：Screening arrangement 1, sensing head 2, polarization maintaining optical fibre 3, secondary cabinet 4.
Embodiment
The present invention is that a kind of optical voltage transformer improves device, mainly includes screening arrangement 1, sensing head 2, polarization maintaining optical fibre
3 and secondary cabinet 4, wherein secondary cabinet 4 includes light path part and circuit part, concrete structure is as shown in Figure 1.By optics electricity
The high-voltage potential that transformer primary side is produced is pressed to produce stable electric field in screening arrangement, sensing head 2 is vacantly placed in screening arrangement 1
In inner space, only it is connected with polarization maintaining optical fibre 3；The other end of polarization maintaining optical fibre 3 is connected with light path part.Light path part passes through light
Electric explorer is connected with circuit part；The light sent from light source is divided into the orthogonal linearly polarized light of two beams by light path part, and leads to
Cross polarization maintaining optical fibre 3 and reach sensing head 2.Sensing head 2 makes two bunch polarised lights produce phase difference in the presence of electric field.From sensing head
The 2 two bunch polarised lights returned are transmitted back to light path part by polarization maintaining optical fibre 3 is interfered, then detects interference light by circuit part
Strong signal is simultaneously carried out after signal transacting, forms data signal output.Filled with SF6 gases in screening arrangement 1, the work of insulation is played
With.
The screening arrangement 1 uses metal shell, and size is 40cm × 30cm × 30cm, wall thickness about 1.5cm.
The sensing head 2 collimates polarization apparatus and electro-optic crystal by faraday and constituted, electric crystal size be 5mm × 5mm ×
10mm。
The polarization maintaining optical fibre 3 uses Xi-Ri brand 1310nm wave band FC/APC polarization maintaining optical fibres.
As shown in Fig. 2 Fig. 2 is the structural representation of light path part in the present invention.The light path part mainly include light source,
Circulator, Y waveguide modulators, polarization-maintaining coupler and photodetector.Circulator receive external light source, one end of circulator with
Photodetector is connected, and the other end of circulator is connected with Y waveguide modulator；The other end of Y waveguide modulator meets guarantor
Inclined coupler, polarization-maintaining coupler is connected by polarization maintaining optical fibre with sensor.
The light source uses super-radiance light emitting diode (SLD), centre wavelength 1310nm；Circulator is protected using 1310 models
Inclined optical fiber circulator；Y waveguide modulator PANWOO brand MIOC type modulators；Polarization-maintaining coupler uses U.S. fairchild
MOC8050M type fiber couplers；Photodetector uses ALPHALAS silicon photodetectors.
Light path part general principle is：The light sent from light source passes through circulator and enters Y waveguide modulators, in Y ripples
Lead and be divided into the orthogonal linearly polarized light of two beams in modulator, this two-beam enters polarization maintaining optical fibre 3 after polarization-maintaining coupler is coupled
Propagated along the fast and slow axis of polarization maintaining optical fibre and reach sensing head 2；After sensing head 2, two beams of information of voltage to be measured are carried
Light is returned along polarization maintaining optical fibre 3 again, is coupled by polarization-maintaining coupler, is interfered at Y waveguide modulators, interference light intensity signal
Electric signal is converted into photodetector by circulator, circuit part is entered afterwards and carries out signal transacting.
As shown in figure 3, Fig. 3 is the structural representation of circuit part in the present invention.Circuit part mainly includes photodetection
Device, A/D converter, digital signal processing unit, D/A converter and respective drive circuit.Photodetector one terminates light
The circulator of road part, the other end is exported to A/D converter；A/D converter is exported to DSP inputs, and DSP outputs meet FPGA
Input, FPGA output point two-way, meets drive circuit B, another road connects D/A converter, and D/A converter connects drive circuit all the way
A；Drive circuit A and drive circuit B are connected with the Y waveguide modulators of light path part.
The A/D converter uses ADC0809 chips, is connected with digital signal processing unit；Signal processing unit by
Digital signal processor DSP and programmable gate array FPGA composition, the DSP inputs represent DSP input interface, and DSP is used
TMS320 models.FPGA input represents FPGA input interface, and FPGA uses EPCS4SI8N models, DSP and FPGA's
Input port delivery outlet is in parallel respectively, while input port connects A/D converter, delivery outlet connection D/A converter；D/A turns
Parallel operation uses DAC0832 chips, delivery outlet connection drive circuit；Drive circuit completes circuit signal using LM324 drive circuits
Output.
The circuit part course of work is as follows：Photodetector detection carries information of voltage to be measured from light path part
Interference light intensity signal, and converting the signal into after voltage signal, be transmitted to A/D converter voltage signal is converted to it is discrete
Digital quantity signal, sends into digital signal processing unit, and the unit is realized by DSP and FPGA, and FPGA is by discrete numeral
Amount signal is demodulated, and demodulation result is integrated, and produces staircase waveform shoulder height, then forms digital staircase by cumulative,
Deliver to D/A converter and be converted to analogue step ripple, the Y waveguide modulators of light path part are applied to through overdrive circuit, it is real
Existing closed-loop control.
Claims (10)
1. a kind of optical voltage transformer improves device, it is characterized in that：Mainly include screening arrangement（1）, sensing head（2）, polarization-maintaining
Optical fiber（3）And secondary cabinet（4）；Sensing head（2）It is placed in screening arrangement（1）It is interior, with polarization maintaining optical fibre（3）It is connected；Polarization-maintaining light
It is fine（3）The other end and secondary cabinet（4）Interior light path part is connected, and light path part passes through photodetector and secondary cabinet
（4）Interior circuit part is connected.
2. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The sensing head（2）It is outstanding
It is vacant in screening arrangement（1）In inner space.
3. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The screening arrangement（1）
It is interior filled with insulation SF6 gases can be played a part of.
4. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The screening arrangement（1）
Using metal shell, size is 40cm × 30cm × 30cm, wall thickness about 1.5cm.
5. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The sensing head（2）By
Faraday collimates polarization apparatus and electro-optic crystal composition, and electric crystal size is 5mm × 5mm × 10mm.
6. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The polarization maintaining optical fibre（3）
Using Xi-Ri brand 1310nm wave band FC/APC polarization maintaining optical fibres.
7. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The light path part is main
Including light source, circulator, Y waveguide modulators, polarization-maintaining coupler and photodetector；Wherein circulator receives external light source, ring
One end of row device is connected with photodetector, and the other end of circulator is connected with Y waveguide modulator；Y waveguide modulator it is another
One end connects polarization-maintaining coupler, and polarization-maintaining coupler is connected by polarization maintaining optical fibre with sensor.
8. a kind of optical voltage transformer according to claim 7 improves device, it is characterized in that：The light source uses super spoke
Penetrate light emitting diode (SLD), centre wavelength 1310nm；Circulator uses 1310 model polarization maintaining fiber ring devices；Y waveguides
Device PANWOO brand MIOC type modulators；Polarization-maintaining coupler uses U.S.'s fairchild's MOC8050M type fiber couplers；Photodetection
Device uses ALPHALAS silicon photodetectors.
9. a kind of optical voltage transformer according to claim 1 improves device, it is characterized in that：The circuit part is main
Including photodetector, A/D converter, digital signal processing unit, D/A converter and respective drive circuit；Wherein light
Electric explorer one end connects the circulator of light path part, and the other end is exported to A/D converter；A/D converter is exported to DSP
Input, DSP outputs connect FPGA inputs, a FPGA output point two-way meets drive circuit B, another road connects D/A converter all the way, count/
Weighted-voltage D/A converter meets drive circuit A；Drive circuit A and drive circuit B are connected with the Y waveguide modulators of light path part.
10. a kind of optical voltage transformer according to claim 9 improves device, it is characterized in that：The A/D converter
Using ADC0809 chips, it is connected with digital signal processing unit；Signal processing unit is by digital signal processor DSP and can compile
Journey gate array FPGA is constituted, and the DSP inputs represent DSP input interface, and DSP uses TMS320 models；The FPGA inputs
FPGA input interface is represented, FPGA uses EPCS4SI8N models, and DSP and FPGA input port delivery outlet are in parallel respectively, together
When input port connection A/D converter, delivery outlet connection D/A converter；D/A converter uses DAC0832 chips, output
Mouth connection drive circuit；Drive circuit completes the output of circuit signal using LM324 drive circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453938.2A CN107271747A (en) | 2017-06-15 | 2017-06-15 | A kind of optical voltage transformer improves device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453938.2A CN107271747A (en) | 2017-06-15 | 2017-06-15 | A kind of optical voltage transformer improves device |
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| Publication Number | Publication Date |
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| CN107271747A true CN107271747A (en) | 2017-10-20 |
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| CN201710453938.2A Pending CN107271747A (en) | 2017-06-15 | 2017-06-15 | A kind of optical voltage transformer improves device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050200362A1 (en) * | 2004-03-10 | 2005-09-15 | Yakymyshyn Christopher P. | Signal acquisition probing and voltage measurement systems using an electro-optical cavity |
| CN102426279A (en) * | 2011-10-26 | 2012-04-25 | 中国电力科学研究院 | All-optical high-voltage voltage transformer |
| CN103197113A (en) * | 2013-02-20 | 2013-07-10 | 国网智能电网研究院 | Quasi-reciprocity reflecting optical voltage sensing unit and sensing system thereof |
| CN203164255U (en) * | 2013-02-20 | 2013-08-28 | 国网智能电网研究院 | Pockels effect-based optical voltage sensor |
| CN206892163U (en) * | 2017-06-15 | 2018-01-16 | 国网辽宁省电力有限公司电力科学研究院 | A kind of optical voltage transformer improves device |
-
2017
- 2017-06-15 CN CN201710453938.2A patent/CN107271747A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050200362A1 (en) * | 2004-03-10 | 2005-09-15 | Yakymyshyn Christopher P. | Signal acquisition probing and voltage measurement systems using an electro-optical cavity |
| CN102426279A (en) * | 2011-10-26 | 2012-04-25 | 中国电力科学研究院 | All-optical high-voltage voltage transformer |
| CN103197113A (en) * | 2013-02-20 | 2013-07-10 | 国网智能电网研究院 | Quasi-reciprocity reflecting optical voltage sensing unit and sensing system thereof |
| CN203164255U (en) * | 2013-02-20 | 2013-08-28 | 国网智能电网研究院 | Pockels effect-based optical voltage sensor |
| CN206892163U (en) * | 2017-06-15 | 2018-01-16 | 国网辽宁省电力有限公司电力科学研究院 | A kind of optical voltage transformer improves device |
Non-Patent Citations (1)
| Title |
|---|
| 温海燕 等: "基于普克尔效应的光学电压互感器的设计和实验" * |
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Application publication date: 20171020 |