CN203811669U - Fiber voltage measurement testing apparatus based on primary electrooptic effect - Google Patents
Fiber voltage measurement testing apparatus based on primary electrooptic effect Download PDFInfo
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- CN203811669U CN203811669U CN201420216555.5U CN201420216555U CN203811669U CN 203811669 U CN203811669 U CN 203811669U CN 201420216555 U CN201420216555 U CN 201420216555U CN 203811669 U CN203811669 U CN 203811669U
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- voltage
- fiber
- optical fiber
- collimating lenses
- induction unit
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- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000005259 measurement Methods 0.000 title abstract description 8
- 230000000694 effects Effects 0.000 title abstract 2
- 239000013307 optical fiber Substances 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 230000010287 polarization Effects 0.000 claims abstract description 6
- 230000005693 optoelectronics Effects 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract 6
- 238000009434 installation Methods 0.000 abstract 1
- 238000012805 post-processing Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910003327 LiNbO3 Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003542 behavioural effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Abstract
The utility model discloses a fiber voltage measurement testing apparatus based on primary electrooptic effect. The device comprises a fiber laser source, a voltage induction unit, a photoelectric detector, an electric signal detector, and a voltage dividing device. The fiber laser source inputs original optical signals to the voltage induction unit through a polarization maintaining optical fiber. The voltage induction unit is connected with the photoelectric detector through a multimode fiber. The photoelectric detector is connected with the electric signal detector. The voltage induction unit is connected with the voltage dividing device. The device applies voltage signals on a measuring site to the voltage induction unit, so as to change characteristics of the original optical signals through the voltage signals, and the changed optical signals are transmitted to a control room in a transformer station through an optical fiber, and postprocessing of the signals is performed to realize measurement of the original voltage signals. The voltage induction unit is small in volume, and is simple and convenient to install on a measuring site, and power supply is not needed. After installation, electrical connection mechanisms of electrical devices or operation test devices in a transmission line or a transformer station are not changed.
Description
Technical field
The utility model relates to a kind of voltage-level detector, particularly a kind of optical fiber voltage measuring test unit based on an electrooptical effect.
Background technology
The insulation withstand long term exposure of electrical equipment operating voltage, also must be able to bear the superpotential of certain amplitude simultaneously, and guarantee power system security moves reliably like this.In the time that Overvoltage Amplitude is higher, may cause the accidents such as insulation flashover equipment punctures, in recent years along with the increase of China's net capacity and putting into operation of a large amount of extra high voltage lines, safe and reliable operation to electric system is had higher requirement, operating experience shows to suffer superpotential amplitude higher in supergrid, and the insulation system of transformer station and transmission line of electricity is caused to serious threat.So to transmission line of electricity or substation bus bar voltage carries out real-time Measurement accuracy, study superpotential behavioural characteristic and Insulation Coordination design has great importance.High amplitude voltage in electrical network need to be converted to that low voltage signal is analyzed and aftertreatment conventionally, and the electric signal of traditional measurement mode needs active could realization to grow Distance Transmission, in while transmitting procedure, can be subject to larger electromagnetic interference (EMI), affects measurement result.Therefore, design a kind of optical fiber voltage measuring test unit based on an electrooptical effect, can reduce electromagnetic interference (EMI) in signals transmission, and measure field is without Power supply, ensures the safety and precise to voltage signal.
Utility model content
In view of this, the utility model provides a kind of optical fiber voltage measuring test unit based on an electrooptical effect, and this device can reduce the electromagnetic interference (EMI) in signals transmission, and measure field is without Power supply, ensures the safety and precise to voltage signal.
The purpose of this utility model is to realize by such technical scheme, a kind of optical fiber voltage measuring test unit based on an electrooptical effect, comprise fiber optic laser source 3, voltage induced unit 4, photodetector 5, electrical signal detection device 6 and bleeder mechanism 10, described fiber optic laser source 3 is input to voltage induced unit 4 by primary light signal by polarization maintaining optical fibre 7, described voltage induced unit 4 is connected by multimode optical fiber 8 with photodetector 5, and described photodetector 5 is connected with electrical signal detection device 6; Described voltage induced unit 4 is connected with bleeder mechanism 10.
Further, described voltage induced unit is electrooptic modulator, and described electrooptic modulator is by the defeated voltage that applies of bleeder mechanism.
Further, described voltage sense unit also comprises the first fiber collimating lenses 12, the first fiber collimating lenses 18, optical polariser 13, optics quarter wave plate 14 and analyzer 17, the light signal of the partially fine optical fiber input of described guarantor enters into electrooptic modulator through the first fiber collimating lenses, optical polariser, optics quarter wave plate successively, and the light signal of electrooptic modulator output enters into multimode optical fiber 8 through analyzer, the second fiber collimating lenses successively.
Further, described electrooptic modulator comprises two plate electrodes (16) and is arranged on the lithium columbate crystal (19) between two plate electrodes, described two plate electrodes and lithium columbate crystal close contact; Described two plate electrodes are connected with bleeder mechanism by concentric cable (9) respectively.
Further, described voltage induced unit also comprises that described the first fiber collimating lenses is separately positioned on the sidewall that test box is relative with the second fiber collimating lenses by insulating resin and the common circular test box for stationary optics of making of metal material.
Owing to having adopted technique scheme, the utlity model has following advantage:
The voltage signal of measure field is applied to voltage induced unit by the utility model, change the characteristic of primary light signal by voltage signal, the light signal after change is transmitted through the fiber to the aftertreatment that controlling chamber in transformer station carries out signal and realizes the measurement to primary voltage signal.Voltage induced unit volume is little, be installed on measure field simple and convenient and without Power supply, after installing, do not change the electrical connection mechanism such as each electrical equipment or service test device in transmission line of electricity or transformer station, measuring process is safe and reliable, and receives that electromagnetic interference (EMI) is less.Thereby this invention has very strong Practical Project and is worth.
Brief description of the drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
Fig. 1 is the structural representation of the optical fiber voltage measuring test unit based on an electrooptical effect;
Fig. 2 is the structural representation of the voltage induced unit that proposes in the present invention.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail; Should be appreciated that preferred embodiment is only for the utility model is described, instead of in order to limit protection domain of the present utility model.
As shown in Figure 1, the optical fiber voltage measuring test unit based on an electrooptical effect, mainly comprises fiber optic laser source 3, voltage induced unit 4, photodetector 5 and electrical signal detection device 6 four parts.Voltage induced unit 4 is positioned at measure field 1, and the consumers such as fiber optic laser source 3, photodetector 5 and electrical signal detection device 6 are positioned at transformer station's controlling chamber 2.
Described voltage induced unit is connected with bleeder mechanism, and bleeder mechanism 10 is parallel to transmission line of electricity or substation bus bar 11 obtains voltage signal, by concentric cable 9, low voltage signal is outputed to voltage induced unit 4.Described voltage induced unit is electrooptic modulator in the present embodiment, and described electrooptic modulator comprises two plate electrodes 16 and is arranged on the lithium columbate crystal 19 between two plate electrodes, described two plate electrodes and lithium columbate crystal close contact; Described two plate electrodes are connected with bleeder mechanism by concentric cable 9 respectively.
Described fiber optic laser source 3 is that 1550mm (also can adopt the signal of its wavelength of base by wavelength, to adapt to the Measurement accuracy of different amplitude voltage signals) primary light signal be input to voltage induced unit 4 by the polarization maintaining optical fibre 7 of 200m, voltage induced unit outputs to photodetector 5 by the multimode optical fiber 8 of 200m after treatment again by original signal, photodetector 5 is converted to electric signal by light signal and outputs to electrical signal detection device 6, finally obtains tested voltage.For cost-saving, the polarization maintaining optical fibre in the present embodiment also can replace with single-mode fiber.
In the present embodiment, the power of fiber optic laser source is 20mW, certainly also can adopt in other embodiments the fiber optic laser source of different capacity to meet the demand of testing ground and transformer station's controlling chamber distance.For example controlling chamber and testing ground distance are 500m, can be just 50mW by the increase of output power of fiber optic laser source.
Voltage induced unit 4 comprises two fiber collimating lenses (i.e. the first fiber collimating lenses 12 and the second fiber collimating lenses 18), an optical polariser 13, an optics quarter wave plate 14, an analyzer 17, a rectangular parallelepiped LiNbO3 crystal 19 is between two copper electrodes 16, voltage signal is introduced by contact conductor 15, and the interface of all optical fiber and collimating apparatus is elects FC/PC as.In the present embodiment, voltage induced unit comprises that one by insulating resin and the common test box for stationary optics of making of metal material, two fiber collimating lenses, optical polariser, optics quarter wave plate, analyzer, LiNbO3 crystal and two copper electrodes are all arranged in test box, and the first fiber collimating lenses is separately positioned on the sidewall that test box is relative with the second fiber collimating lenses.
In the present embodiment, the length of described test box is 120mm, and wide is 30mm, and height is 30mm, and the diameter of optical polariser, optics quarter wave plate and analyzer is 11mm; The length of lithium columbate crystal is 20mm, and wide is 6mm, and height is 4mm; The length of copper electrode is 20mm, and wide is 6mm, and height is 1mm.
The main technique processing object of test unit is voltage induced unit 4, its profile is rectangular parallelepiped insulating resin test box, processing technology will ensure that light signal that polarization maintaining optical fibre 7 inputs is after successively through the first fiber collimating lenses 12, optical polariser 13, optics quarter wave plate 14, rectangular parallelepiped LiNbO3 crystal 19 and analyzer 17, can be coupled into multimode optical fiber 8 by the second fiber optic collimator mirror 18, finally the light signal through voltage modulated is transported to photodetector 5, to realize the function of measuring voltage.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (5)
1. the optical fiber voltage measuring test unit based on an electrooptical effect, it is characterized in that: comprise fiber optic laser source (3), voltage induced unit (4), photodetector (5), electrical signal detection device (6) and bleeder mechanism (10), described fiber optic laser source (3) is input to voltage induced unit (4) by primary light signal by polarization maintaining optical fibre (7), described voltage induced unit (4) is connected by multimode optical fiber (8) with photodetector (5), described photodetector (5) is connected with electrical signal detection device (6), described voltage induced unit (4) is connected with bleeder mechanism (10).
2. the optical fiber voltage measuring test unit based on an electrooptical effect according to claim 1, is characterized in that: described voltage induced unit is electrooptic modulator, described electrooptic modulator is by the defeated voltage that applies of bleeder mechanism.
3. the optical fiber voltage measuring test unit based on an electrooptical effect according to claim 2, it is characterized in that: described voltage sense unit also comprises the first fiber collimating lenses (12), the first fiber collimating lenses (18), optical polariser (13), optics quarter wave plate (14) and analyzer (17), the light signal of the fine optical fiber input of described guarantor is successively through the first fiber collimating lenses, optical polariser, optics quarter wave plate enters into electrooptic modulator, the light signal of electrooptic modulator output passes through analyzer successively, the second fiber collimating lenses enters into multimode optical fiber (8).
4. the optical fiber voltage measuring test unit based on an electrooptical effect according to claim 2, it is characterized in that: described electrooptic modulator comprises two plate electrodes (16) and is arranged on the lithium columbate crystal (19) between two plate electrodes, described two plate electrodes and lithium columbate crystal close contact; Described two plate electrodes are connected with bleeder mechanism by concentric cable (9) respectively.
5. the optical fiber voltage measuring test unit based on an electrooptical effect according to claim 3, it is characterized in that: described voltage induced unit also comprises that described the first fiber collimating lenses is separately positioned on the sidewall that test box is relative with the second fiber collimating lenses by insulating resin and the common circular test box for stationary optics of making of metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216555.5U CN203811669U (en) | 2014-04-29 | 2014-04-29 | Fiber voltage measurement testing apparatus based on primary electrooptic effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216555.5U CN203811669U (en) | 2014-04-29 | 2014-04-29 | Fiber voltage measurement testing apparatus based on primary electrooptic effect |
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| CN203811669U true CN203811669U (en) | 2014-09-03 |
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| CN201420216555.5U Expired - Lifetime CN203811669U (en) | 2014-04-29 | 2014-04-29 | Fiber voltage measurement testing apparatus based on primary electrooptic effect |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445530A (en) * | 2015-11-27 | 2016-03-30 | 国网重庆市电力公司电力科学研究院 | Non-contact optical voltage sensor used for power grid overvoltage multi-point monitoring |
| CN106841748A (en) * | 2017-01-24 | 2017-06-13 | 重庆大学 | Full light path voltage measurement system and method based on inverse piezoelectric effect and fiber grating |
| CN108333470A (en) * | 2018-01-18 | 2018-07-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of induction electro-optical grid equipment voltage increases monitoring device and method suddenly |
| CN108344910A (en) * | 2018-01-18 | 2018-07-31 | 珠海市飞天科技有限公司 | A kind of power system monitoring equipment, system and method |
| CN108734946A (en) * | 2018-04-27 | 2018-11-02 | 华中光电技术研究所（中国船舶重工集团有限公司第七七研究所） | A kind of novel switched control box |
| CN108761851A (en) * | 2018-08-09 | 2018-11-06 | 中国电子科技集团公司第二十六研究所 | A kind of polarization maintaining optical fibre high speed electro-optical device |
| CN111323636A (en) * | 2020-02-26 | 2020-06-23 | 贵州江源电力建设有限公司 | Optical fiber sensing system and method for non-contact measurement of high-voltage transmission conductor voltage |
-
2014
- 2014-04-29 CN CN201420216555.5U patent/CN203811669U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445530A (en) * | 2015-11-27 | 2016-03-30 | 国网重庆市电力公司电力科学研究院 | Non-contact optical voltage sensor used for power grid overvoltage multi-point monitoring |
| CN106841748A (en) * | 2017-01-24 | 2017-06-13 | 重庆大学 | Full light path voltage measurement system and method based on inverse piezoelectric effect and fiber grating |
| CN106841748B (en) * | 2017-01-24 | 2019-04-30 | 重庆大学 | Full optical path voltage measurement system and method based on inverse piezoelectric effect and fiber grating |
| CN108333470A (en) * | 2018-01-18 | 2018-07-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of induction electro-optical grid equipment voltage increases monitoring device and method suddenly |
| CN108344910A (en) * | 2018-01-18 | 2018-07-31 | 珠海市飞天科技有限公司 | A kind of power system monitoring equipment, system and method |
| CN108333470B (en) * | 2018-01-18 | 2023-05-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Device and method for monitoring voltage steep increase of inductive electro-optical power grid equipment |
| CN108734946A (en) * | 2018-04-27 | 2018-11-02 | 华中光电技术研究所（中国船舶重工集团有限公司第七七研究所） | A kind of novel switched control box |
| CN108734946B (en) * | 2018-04-27 | 2020-10-30 | 华中光电技术研究所（中国船舶重工集团有限公司第七一七研究所） | Novel switch control box |
| CN108761851A (en) * | 2018-08-09 | 2018-11-06 | 中国电子科技集团公司第二十六研究所 | A kind of polarization maintaining optical fibre high speed electro-optical device |
| CN111323636A (en) * | 2020-02-26 | 2020-06-23 | 贵州江源电力建设有限公司 | Optical fiber sensing system and method for non-contact measurement of high-voltage transmission conductor voltage |
| CN111323636B (en) * | 2020-02-26 | 2022-05-27 | 贵州江源电力建设有限公司 | Optical fiber sensing system and method for non-contact measurement of high-voltage transmission conductor voltage |
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