CN205427023U - Optics current measuring device - Google Patents
Optics current measuring device Download PDFInfo
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- CN205427023U CN205427023U CN201620142861.8U CN201620142861U CN205427023U CN 205427023 U CN205427023 U CN 205427023U CN 201620142861 U CN201620142861 U CN 201620142861U CN 205427023 U CN205427023 U CN 205427023U
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- magnetic field
- optical
- solenoid
- light valve
- field sensor
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Abstract
The utility model discloses an optics current measuring device, including sensing head system, dynamic correction system, photoelectricity demodulation system and fiber optic tap ware, the sensing head system includes one or more crystal light valve magnetic field sensor, one or more solenoid, P1 current terminal and P2 current terminal, and the both ends of crystal light valve magnetic field sensor are passed through optic fibre and are connected with the fiber optic tap ware, and dynamic correction system passes through the down light interface connection of optic fibre and fiber optic tap ware, and photoelectricity demodulation system includes light source, photoelectricity demodulation unit and optical cable, and photoelectricity demodulation system passes through the optical cable and is connected with the fiber optic tap ware. The utility model discloses the influence of factors such as temperature, magnetic field has been eliminated to the device, through the enlarged primary current signal of solenoid, detects through difference double -light -path simultaneously, eliminates the external magnetic field interference, has improved the measurement accuracy of optics mutual -inductor greatly, can measure minimum rated current and be 0.5A, and the class of accuracy is the 0.2S level.
Description
Technical field
This utility model relates to electrical equipment technical field, particularly relates to a kind of optical current measurement apparatus.
Background technology
At present, under high pressure and ultra-high pressure condition, in power system, widely used oil-filled induction current transformer is to realize the measurement of electric current, but is limited to by its measuring principle, and this kind of current transformer also exists insulation difficulty, the shortcomings such as magnetic saturation under fault current.Therefore, people strive to find a kind of novel current transformer always, optical current mutual inductor based on Faraday magnetooptical effect principle is considered as a kind of Novel electric flow measurement device with wide application prospect, it is simple and reliable, without advantages such as magnetic saturation, dangerous without second open circuit, anti-electromagnetic interference capability is strong, volume is little, lightweight, installation and transportation convenience that it has insulation, compared with traditional CT, there is considerable cost performance.Therefore, this field has become as the international focus competitively studied, nearly ten years, more existing experimental prototype hanging net operations at present, achieves preferable effect, but also exposes some problems such as the stability of temperature stability, longtime running.Therefore, appropriate design optical current mutual inductor system, careful selection all parts is particularly important improving its performance.
Utility model content
For overcoming the deficiencies in the prior art, this utility model provides a kind of optical current measurement apparatus based on crystal light valve magnetic field sensor, utilize the method induced field of Faraday magnetooptical effect, the electric current in computation and measurement generation magnetic field is carried out by analyzing magnetic field, primary current signal is amplified by solenoid, simultaneously by difference double photo paths, eliminate external magnetic field interference, substantially increase the certainty of measurement of optical transformer.
In order to solve the technical problem in background technology, this utility model provides a kind of optical current measurement apparatus, including sense head system, dynamic correcting system, photoelectrolysis adjusting system and optical fiber branch device；
nullDescribed sense head system includes one or more crystal light valve magnetic field sensor、One or more solenoids、P1 current terminal and P2 current terminal，Described crystal light valve magnetic field sensor is fixed in described solenoid，And be coaxially disposed with described solenoid，The length of described crystal light valve magnetic field sensor is less than described solenoidal length，Described solenoid when being one described P1 current terminal and P2 current terminal drawn by solenoid two ends，Or described solenoid is when being multiple，It is linked in sequence by plain conductor between described solenoid，P1 current terminal drawn by first solenoid being linked in sequence，P2 current terminal drawn by last solenoid being linked in sequence，The two ends of described crystal light valve magnetic field sensor are connected by optical fiber optical interface descending with described optical fiber branch device，Described crystal light valve magnetic field sensor is identical with described solenoidal quantity and one_to_one corresponding；
Described dynamic correcting system is connected with the descending optical interface of described optical fiber branch device by optical fiber, described dynamic correcting system is used for converting optical signal into electric current, and then formed outside crystal light valve magnetic field sensor with reference to magnetic field, described crystal light valve magnetic field sensor is detected simultaneously by the tested magnetic field produced with reference to magnetic field and described solenoid；
Described photoelectrolysis adjusting system includes light source and photoelectricity demodulating unit, described photoelectrolysis adjusting system is connected by optical cable optical interface up with described optical fiber branch device, described light source sends the first constant optical signal, second optical signal and the 3rd optical signal, described first optical signal and the second optical signal are transferred to described crystal light valve magnetic field sensor by described optical fiber branch device, described 3rd optical signal is transferred to described dynamic correcting system by described optical fiber branch device, the field signal of the tested electric current that described crystal light valve magnetic field sensor is sensed passes described photoelectrolysis adjusting system back by optical fiber branch device, the optical signal fed back to is converted into the signal of telecommunication by described photoelectrolysis adjusting system, and be demodulated, calculate tested electric current.
Further, the plurality of solenoid parallel pour integral.
Further, described dynamic correcting system includes that photoelectric calibration device and reference coil, described photoelectric calibration device are connected with the descending optical interface of described optical fiber branch device, and described reference coil is placed in described solenoid.
Further, described reference coil is identical with the quantity of described crystal light valve magnetic field sensor and one_to_one corresponding, is linked in sequence by plain conductor between described reference coil.
Further, the wavelength of described first optical signal is 1400-1600nm；The wavelength of described second optical signal is 1350-1550nm；The wavelength of described 3rd optical signal is 850-1050nm.
Specifically, described first optical signal and the second optical signal composition difference double light path.
Specifically, described light source is laser instrument.
Further, the current data that described photoelectrolysis adjusting system is measured is packed with IEC61850 standard agreement form, sends to subordinate's combining unit.
A kind of optical current measurement apparatus of the present utility model, eliminate the impact of the factor such as temperature, magnetic field, primary current signal is amplified by solenoid, simultaneously by difference double photo paths, elimination external magnetic field is disturbed, and substantially increases the certainty of measurement of optical transformer, and can measure minimum rated current is 0.5A, class of accuracy is 0.2S level, reaches international most advanced level.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical solution of the utility model, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of this utility model a kind of optical current measurement apparatus.
Wherein, in figure, reference corresponds to: 1-crystal light valve magnetic field sensor, 2-solenoid, 3-P1 current terminal, 4-P2 current terminal, 5-photoelectric calibration device, 6-reference coil, 7-optical fiber branch device, 8-light source, 9-photoelectricity demodulating unit, 10-optical cable.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, broadly fall into the scope of this utility model protection.
Embodiment 1:
The utility model discloses a kind of optical current measurement apparatus, including sense head system, dynamic correcting system, photoelectrolysis adjusting system and optical fiber branch device 7；
Described sense head system includes a crystal light valve magnetic field sensor 1, one solenoid 2, P1 current terminal 3 and P2 current terminal 4, described crystal light valve magnetic field sensor 1 is fixed in described solenoid 2, and be coaxially disposed with described solenoid 2, the length of described crystal light valve magnetic field sensor 1 is less than the length of described solenoid 2, described P1 current terminal 3 when described solenoid 2 is one, P2 current terminal 4 is drawn by solenoid 2 two ends, , P1 current terminal 3 and P2 current terminal 4 accesses tested electric current, the two ends of described crystal light valve magnetic field sensor 1 are connected with the described descending optical interface of optical fiber branch device 7 by optical fiber, described crystal light valve magnetic field sensor 1 is identical with the quantity of described solenoid 2 and one_to_one corresponding；
Described dynamic correcting system is connected with the descending optical interface of described optical fiber branch device 7 by optical fiber, described dynamic correcting system is used for converting optical signal into electric current, and then formed outside crystal light valve magnetic field sensor 1 with reference to magnetic field, described crystal light valve magnetic field sensor 1 is detected simultaneously by the tested magnetic field produced with reference to magnetic field and described solenoid 2；
Described photoelectrolysis adjusting system includes light source 8 and photoelectricity demodulating unit 9, described photoelectrolysis adjusting system is connected with the described up optical interface of optical fiber branch device 7 by optical cable 10, described light source 8 sends the first constant optical signal, second optical signal and the 3rd optical signal, described first optical signal and the second optical signal are transferred to described crystal light valve magnetic field sensor 1 by described optical fiber branch device 7, described 3rd optical signal is transferred to described dynamic correcting system by described optical fiber branch device 7, the field signal of the tested electric current that described crystal light valve magnetic field sensor 1 is sensed passes described photoelectrolysis adjusting system back by optical fiber branch device 7, the optical signal fed back to is converted into the signal of telecommunication by described photoelectrolysis adjusting system, and be demodulated, calculate tested electric current.
Further, the plurality of solenoid 2 parallel pour integral.
Further, described dynamic correcting system includes that photoelectric calibration device 5 and reference coil 6, described photoelectric calibration device 5 are connected with the descending optical interface of described optical fiber branch device 7, and described reference coil 6 is placed in described solenoid 2.
Further, described reference coil 6 is identical with the quantity of described crystal light valve magnetic field sensor 1 and one_to_one corresponding, is linked in sequence by plain conductor between described reference coil 6.
Further, the wavelength of described first optical signal be 1550nm, power be 450 μ W；The wavelength of described second optical signal is 1490nm, power is 450 μ W；The wavelength of described 3rd optical signal is 980nm, power is 120 μ W.
Specifically, described first optical signal and the second optical signal composition difference double light path.
Specifically, described light source is laser instrument.
Further, the current data that described photoelectrolysis adjusting system is measured is packed with IEC61850 standard agreement form, sends to subordinate's combining unit.
Embodiment 2:
Refer to Fig. 1, the utility model discloses a kind of optical current measurement apparatus, including sense head system, dynamic correcting system, photoelectrolysis adjusting system and optical fiber branch device 7；
nullDescribed sense head system includes two crystal light valve magnetic field sensors 1、Two solenoids 2、P1 current terminal 3 and P2 current terminal 4，Described crystal light valve magnetic field sensor 1 is fixed in described solenoid 2，And be coaxially disposed with described solenoid 2，The length of described crystal light valve magnetic field sensor 1 is less than the length of described solenoid 2，It is linked in sequence by plain conductor between described solenoid 2 when described solenoid 2 is two，P1 current terminal 3 drawn by first solenoid being linked in sequence，P2 current terminal 4 drawn by last solenoid being linked in sequence，P1 current terminal 3 and P2 current terminal 4 accesses tested electric current，The two ends of described crystal light valve magnetic field sensor 1 are connected with the described descending optical interface of optical fiber branch device 7 by optical fiber，Described crystal light valve magnetic field sensor 1 is identical with the quantity of described solenoid 2 and one_to_one corresponding；
Described dynamic correcting system is connected with the descending optical interface of described optical fiber branch device 7 by optical fiber, described dynamic correcting system is used for converting optical signal into electric current, and then formed outside crystal light valve magnetic field sensor 1 with reference to magnetic field, described crystal light valve magnetic field sensor 1 is detected simultaneously by the tested magnetic field produced with reference to magnetic field and described solenoid 2；
Described photoelectrolysis adjusting system includes light source 8 and photoelectricity demodulating unit 9, described photoelectrolysis adjusting system is connected with the described up optical interface of optical fiber branch device 7 by optical cable 10, described light source 8 sends the first constant optical signal, second optical signal and the 3rd optical signal, described first optical signal and the second optical signal are transferred to described crystal light valve magnetic field sensor 1 by described optical fiber branch device 7, described 3rd optical signal is transferred to described dynamic correcting system by described optical fiber branch device 7, the field signal of the tested electric current that described crystal light valve magnetic field sensor 1 is sensed passes described photoelectrolysis adjusting system back by optical fiber branch device 7, the optical signal fed back to is converted into the signal of telecommunication by described photoelectrolysis adjusting system, and be demodulated, calculate tested electric current.
Further, the plurality of solenoid 2 parallel pour integral.
Further, described dynamic correcting system includes that photoelectric calibration device 5 and reference coil 6, described photoelectric calibration device 5 are connected with the descending optical interface of described optical fiber branch device 7, and described reference coil 6 is placed in described solenoid 2.
Further, described reference coil 6 is identical with the quantity of described crystal light valve magnetic field sensor 1 and one_to_one corresponding, is linked in sequence by plain conductor between described reference coil 6.
Further, the wavelength of described first optical signal be 1550nm, power be 450 μ W；The wavelength of described second optical signal is 1490nm, power is 450 μ W；The wavelength of described 3rd optical signal is 980nm, power is 120 μ W.
Specifically, described first optical signal and the second optical signal composition difference double light path.
Specifically, described light source is laser instrument.
Further, the current data that described photoelectrolysis adjusting system is measured is packed with IEC61850 standard agreement form, sends to subordinate's combining unit.
A kind of optical current measurement apparatus of the present utility model, eliminate the impact of the factor such as temperature, magnetic field, primary current signal is amplified by solenoid, simultaneously by difference double photo paths, elimination external magnetic field is disturbed, and substantially increases the certainty of measurement of optical transformer, and can measure minimum rated current is 0.5A, class of accuracy is 0.2S level, reaches international most advanced level.
The optical current measurement apparatus work process of this utility model embodiment is as follows: sent the first constant optical signal by light source laser and the second optical signal passes sequentially through optical cable, optical fiber branch device and fiber-optic transfer are to crystal light valve magnetic field sensor, the field signal of the tested electric current that crystal light valve magnetic field sensor is sensed passes photoelectrolysis adjusting system back by optical fiber, sent the 3rd constant optical signal by light source laser and pass sequentially through optical cable, optical fiber branch device and fiber-optic transfer are to dynamic correcting system, dynamic correcting system converts optical signal into electric current, and then formed outside crystal light valve magnetic field sensor with reference to magnetic field, crystal light valve magnetic field sensor is detected simultaneously by the tested magnetic field produced with reference to magnetic field and solenoid；The field signal of the tested electric current that crystal light valve magnetic field sensor is sensed passes described photoelectrolysis adjusting system back by optical fiber, the optical signal fed back to is converted into the signal of telecommunication by described photoelectrolysis adjusting system, and be demodulated, calculate tested electric current, and pack with IEC61850 standard agreement form, send to subordinate's combining unit.
In this utility model specific embodiment 2, solenoid quantity is not necessarily two, can be three, four or more.
The above is preferred implementation of the present utility model; it it is noted that for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (8)
1. an optical current measurement apparatus, it is characterised in that include sense head system, dynamic correcting system, photoelectrolysis adjusting system and optical fiber branch device (7)；
nullDescribed sense head system includes one or more crystal light valve magnetic field sensor (1)、One or more solenoids (2)、P1 current terminal (3) and P2 current terminal (4)，Described crystal light valve magnetic field sensor (1) is fixed in described solenoid (2)，And be coaxially disposed with described solenoid (2)，The length of described crystal light valve magnetic field sensor (1) is less than the length of described solenoid (2)，When described solenoid (2) is one，Described P1 current terminal (3) and P2 current terminal (4) are drawn by solenoid (2) two ends，Or described solenoid (2) is when being multiple，Described solenoid is linked in sequence by plain conductor between (2)，P1 current terminal (3) drawn by first solenoid being linked in sequence，P2 current terminal (4) drawn by last solenoid being linked in sequence，The two ends of described crystal light valve magnetic field sensor (1) are connected with described optical fiber branch device (7) descending optical interface by optical fiber，Described crystal light valve magnetic field sensor (1) is identical with the quantity of described solenoid (2) and one_to_one corresponding；
Described dynamic correcting system is connected with the descending optical interface of described optical fiber branch device (7) by optical fiber, described dynamic correcting system is used for converting optical signal into electric current, and then being formed with reference to magnetic field in crystal light valve magnetic field sensor (1) outside, described crystal light valve magnetic field sensor (1) is detected simultaneously by the tested magnetic field produced with reference to magnetic field and described solenoid (2)；
Described photoelectrolysis adjusting system includes light source (8) and photoelectricity demodulating unit (9), described photoelectrolysis adjusting system is connected with described optical fiber branch device (7) up optical interface by optical cable (10), described light source (8) sends the first constant optical signal, second optical signal and the 3rd optical signal, described first optical signal and the second optical signal are transferred to described crystal light valve magnetic field sensor (1) by described optical fiber branch device (7), described 3rd optical signal is transferred to described dynamic correcting system by described optical fiber branch device (7), the field signal of the tested electric current that described crystal light valve magnetic field sensor (1) is sensed passes described photoelectrolysis adjusting system back by optical fiber branch device (7), the optical signal fed back to is converted into the signal of telecommunication by described photoelectrolysis adjusting system, and be demodulated, calculate tested electric current.
A kind of optical current measurement apparatus the most according to claim 1, it is characterised in that the plurality of solenoid (2) is parallel pour integral.
A kind of optical current measurement apparatus the most according to claim 1, it is characterized in that, described dynamic correcting system includes photoelectric calibration device (5) and reference coil (6), described photoelectric calibration device (5) is connected with the descending optical interface of described optical fiber branch device (7), and described reference coil (6) is placed in described solenoid (2).
A kind of optical current measurement apparatus the most according to claim 3, it is characterized in that, described reference coil (6) is identical with the quantity of described crystal light valve magnetic field sensor (1) and one_to_one corresponding, and described reference coil is linked in sequence by plain conductor between (6).
A kind of optical current measurement apparatus the most according to claim 1, it is characterised in that the wavelength of described first optical signal is 1400-1600nm；The wavelength of described second optical signal is 1350-1550nm；The wavelength of described 3rd optical signal is 850-1050nm.
A kind of optical current measurement apparatus, it is characterised in that described first optical signal and the second optical signal composition difference double light path.
A kind of optical current measurement apparatus, it is characterised in that described light source is laser instrument.
A kind of optical current measurement apparatus the most according to claim 1, it is characterised in that the current data that described photoelectrolysis adjusting system is measured is packed with IEC61850 standard agreement form, sends to subordinate's combining unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620142861.8U CN205427023U (en) | 2016-02-25 | 2016-02-25 | Optics current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620142861.8U CN205427023U (en) | 2016-02-25 | 2016-02-25 | Optics current measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN205427023U true CN205427023U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620142861.8U Withdrawn - After Issue CN205427023U (en) | 2016-02-25 | 2016-02-25 | Optics current measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548664A (en) * | 2016-02-25 | 2016-05-04 | 江苏思源赫兹互感器有限公司 | Optical current-measurement device |
| CN110940845A (en) * | 2019-11-22 | 2020-03-31 | 国网山西省电力公司大同供电公司 | Fiber bragg grating current transformer attached to surface of cable sheath grounding wire |
-
2016
- 2016-02-25 CN CN201620142861.8U patent/CN205427023U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548664A (en) * | 2016-02-25 | 2016-05-04 | 江苏思源赫兹互感器有限公司 | Optical current-measurement device |
| CN105548664B (en) * | 2016-02-25 | 2019-09-13 | 江苏思源赫兹互感器有限公司 | A kind of optical current measuring device |
| CN110940845A (en) * | 2019-11-22 | 2020-03-31 | 国网山西省电力公司大同供电公司 | Fiber bragg grating current transformer attached to surface of cable sheath grounding wire |
| CN110940845B (en) * | 2019-11-22 | 2022-06-14 | 国网山西省电力公司大同供电公司 | Fiber bragg grating current transformer attached to surface of cable sheath grounding wire |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20190913 |