CN202735387U - Electric current transformer based on fiber vibration sensor - Google Patents
Electric current transformer based on fiber vibration sensor Download PDFInfo
- Publication number
- CN202735387U CN202735387U CN 201220354334 CN201220354334U CN202735387U CN 202735387 U CN202735387 U CN 202735387U CN 201220354334 CN201220354334 CN 201220354334 CN 201220354334 U CN201220354334 U CN 201220354334U CN 202735387 U CN202735387 U CN 202735387U
- Authority
- CN
- China
- Prior art keywords
- vibration sensor
- soft iron
- secondary side
- sensing head
- optical fibre
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an electric current transformer based on a fiber vibration sensor. The electric current transformer based on the fiber vibration sensor comprises a primary side current bus, a precision Rogowski coil, a magnetic shielding casing, a secondary side sensing head, the fiber vibration sensor, a processing system, soft irons A, soft irons B, a solenoid, folding rings and a magnet, wherein the precision Rogowski coil is sleeved on the primary side current bus and in equipotential connection with the primary side current bus, the precision Rogowski coil is further connected with the secondary side sensing head to form a primary sensing element, the secondary side sensing head is located in the magnetic shielding casing, the secondary side sensing head is connected with the fiber vibration sensor which is taken as a secondary sensing element, the fiber vibration sensor is connected with the signal processing system, an inner magnetic structure of the secondary side sensing head comprises the soft irons A and the soft irons B which have strong magnetic conductive capability, and the soft irons A and the soft irons B are respectively connected with two poles of the magnet. The electric current transformer based on the fiber vibration sensor has properties of good shock resistance performance, simple structure and stable and reliable performances and can be widely applied in super-heavy current detection production.
Description
Technical field
The utility model relates to High-Voltage Electrical Appliances and optical measurement field, relates in particular to the electrodynamic type current transformer based on optical fibre vibration sensor.
Background technology
Continuous rising along with voltage class of electric power system, the interior insulation of tradition oil-immersed current transformer is more and more difficult, and potential mishap risk, and in recent years country's plan of proposing to build digital electric network, make traditional oil-immersed current transformer more and more can not satisfy current demand; Although the optical current mutual inductor based on Magnet-Optic Faraday Effect is the fine sensing technology of a kind of light harvesting, photoelectric technology, the multidisciplinary theory such as nonlinear optics and advanced signal processing technology and application technology are in the new type current transformer in high voltage of one, compare with traditional high-voltage great-current mutual inductor technology, it is good that optical current mutual inductor has insulating property, without magnetic saturation, range of dynamic measurement is large, the advantages such as anti-electromagnetic interference capability is strong, become the new direction of current transformer of future generation, but the development of the optical current mutual inductor of prior art has run into temperature variant linear birefrigence has tremendous influence to testing result problem, and this impact can't directly be eliminated in system, make research and development run into bottleneck, Many researchers has lost confidence to this; In addition, adopt and the equipotential Luo-coil current transformer of primary side, because signal demand is processed at primary side, so that the reliability of mutual inductor and maintainability reduce, limited the popularization of this type of mutual inductor, therefore need to seek novel sensing measurement mode.
The utility model content
The purpose of this utility model is, overcomes the deficiencies in the prior art part, and a kind of electrodynamic type current transformer based on optical fibre vibration sensor is provided, and shock resistance is good, and is simple in structure, reliable and stable.
Electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model includes primary side current bus, accurate Luo-coil, magnetic shielding shell, secondary side sensing head, optical fibre vibration sensor, disposal system, soft iron A, soft iron B, solenoid, ring and magnet.Accurate Luo-coil is enclosed within on the primary side current bus, and be connected with primary side current bus equipotential, accurate Luo-coil links to each other with the secondary side sensing head simultaneously, consist of primary sensing element, the secondary side sensing head places in the middle of the magnetic shielding shell, the secondary side sensing head links to each other with optical fibre vibration sensor as the secondary sensing element, and optical fibre vibration sensor links to each other with signal processing system.The secondary side sensing head has interior magnetic and two kinds of structures of outer magnetic.Secondary side sensing head for inner magnetic structure, include soft iron A and soft iron B with very strong magnetic conduction ability, soft iron A is connected with the two poles of the earth of magnet respectively with soft iron B, consist of inner magnetic structure, if said magnet is permanent magnet, then the magnetic direction between soft iron A and soft iron B slit is constant all the time, if said magnet is electromagnet, then magnet spool is connected with accurate Luo-coil, connect with solenoid simultaneously, the magnetic field that magnet produces produces very strong magnetic field along soft iron A and soft iron B conduction at the place, slit of soft iron A and soft iron B, solenoid places in the middle of the slit of soft iron A and soft iron B, and solenoid and skeleton thereof link to each other with ring; Secondary side sensing head for outer magnetic structure, include soft iron A and soft iron B with very strong magnetic conduction ability, soft iron A is connected with the two poles of the earth of magnet respectively with soft iron B, consist of outer magnetic structure, said magnet is permanent magnet, magnetic direction between soft iron A and soft iron B slit is constant all the time, and solenoid places in the middle of the slit of soft iron A and soft iron B, and solenoid and skeleton thereof link to each other with ring.Solenoid and accurate Luo-coil are in series, and when having electric current to flow through in the solenoid, it will be subject to the effect of magnetic field force between soft iron A and soft iron B slit, and the direction of this power interacts with ring up or down, makes the solenoid vibration.Optical fibre vibration sensor is used to detect solenoidal vibration, and the gained vibration information is processed through signal processing system, finally obtains the current value in the primary side current bus.The utility model is used as primary sensing element to little solenoidal conventional electromagnetic current transducer of series connection, and this little solenoid placed in the middle of the another one magnetic field, when the secondary side current in this conventional current mutual inductor flows through little solenoid, by electromagnetic induction, little solenoid will produce vibration.An optical fibre vibration sensor is used as the secondary sensing element, measures little solenoidal vibration with it, obtains tested primary current through demodulation.Primary sensing element and primary side voltage are idiostatic, the optical fibre vibration sensor of secondary sensing element self good insulation preformance, so electrodynamic type current transformer based on optical fibre vibration sensor of the present utility model does not need to do interior insulation, shock resistance is good, simple in structure, reliable and stable.Optical fibre vibration sensor links to each other with solenoid in the secondary side sensing head, surveys solenoidal vibration.
Evidence, the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model not only can very accurately be measured super-large current, and need not do interior insulation, and do not need magneto-optic glass, do not need to the high-pressure side energy supply, energy Chinese People's Anti-Japanese Military and Political College rush of current, anti-electromagnetic interference (EMI), temperature performance is stable.Electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model has simple in structure, easy to operate, good stability, and the characteristics such as safe and reliable can be widely used in super-large current and detect in the production practices.
Description of drawings
Accompanying drawing 1 is the electrodynamic type current transformer principle structure schematic diagram based on optical fibre vibration sensor described in the utility model; Accompanying drawing 2 is principle inner magnetic structure schematic diagram of the secondary side sensing head of the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model; Accompanying drawing 3 is outer magnetic structure schematic diagram of principle of the secondary side sensing head of the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model; Accompanying drawing 4 is plan structure schematic diagram of the secondary side sensing head of the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model.1-primary side current bus 2-accurate Luo-coil 3-magnetic shielding shell 4-secondary side sensing head 5-optical fibre vibration sensor 6-disposal system 41-soft iron A 42-soft iron B 43-solenoid 44-ring 45-magnet.
Embodiment
Referring now to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4, be described as follows in conjunction with the embodiments: the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model includes primary side current bus 1, accurate Luo-coil 2, magnetic shielding shell 3, secondary side sensing head 4, optical fibre vibration sensor 5, disposal system 6, soft iron A41, soft iron B42, solenoid 43, ring 44 and magnet 45.As shown in Figure 1, accurate Luo-coil 2 is enclosed within on the primary side current bus 1, and be connected with primary side current bus 1 equipotential, accurate Luo-coil 2 links to each other with secondary side sensing head 4 simultaneously, consist of primary sensing element, secondary side sensing head 4 places in the middle of the magnetic shielding shell 3, and secondary side sensing head 4 links to each other with optical fibre vibration sensor 5 as the secondary sensing element, and optical fibre vibration sensor 5 links to each other with signal processing system 6.Electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model, secondary side sensing head include soft iron A41 with very strong magnetic conduction ability and soft iron B42, solenoid 43, ring 44, magnet 45 as shown in Figure 2.For the secondary side sensing head of inner magnetic structure as shown in Figure 2, soft iron A41 is connected with the two poles of the earth of magnet 45 respectively with soft iron B42, consist of inner magnetic structure, if said magnet 45 is permanent magnet, then the magnetic direction between soft iron A41 and soft iron B42 slit is constant all the time, if said magnet 45 is electromagnet, then magnet spool is connected with accurate Luo-coil 2, connect with solenoid 43 simultaneously, the magnetic field that magnet 45 produces is along soft iron A41 and soft iron B42 conduction, place, slit at soft iron A41 and soft iron B42 produces very strong magnetic field, and solenoid 43 places in the middle of the slit of soft iron A41 and soft iron B42, and solenoid 43 and skeleton thereof link to each other with ring 44.Solenoid 43 is in series with accurate Luo-coil 2, and when having electric current to flow through in the solenoid 43, it will be subject to the effect of magnetic field force between soft iron A41 and soft iron B42 slit, and the direction of this power interacts with ring 44 up or down, makes solenoid 43 vibrations.For the secondary side sensing head of outer magnetic structure as shown in Figure 3, soft iron A41 is connected with the two poles of the earth of magnet 45 respectively with soft iron B42, consist of outer magnetic structure, said magnet 45 is permanent magnet, magnetic direction between soft iron A41 and soft iron B42 slit is constant all the time, the magnetic field that magnet 45 produces is along soft iron A41 and soft iron B42 conduction, place, slit at soft iron A41 and soft iron B42 produces very strong magnetic field, solenoid 43 places in the middle of the slit of soft iron A41 and soft iron B42, and solenoid 43 and skeleton thereof link to each other with ring 44.Solenoid 43 is in series with accurate Luo-coil 2, has electric current to flow through in solenoid 43, and it will be subject to the effect of magnetic field force between soft iron A41 and soft iron B42 slit, and the direction of this power interacts with ring 44 up or down, makes solenoid 43 vibrations.Electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model, optical fibre vibration sensor 5 is used to detect the vibration of solenoid 43, the gained vibration information is processed through signal processing system 6, finally obtains the current value in the primary side current bus 1.The utility model is used as primary sensing element to little solenoidal conventional electromagnetic current transducer of series connection, and this little solenoid placed in the middle of the another one magnetic field, when the secondary side current in this conventional current mutual inductor flows through little solenoid, by electromagnetic induction, little solenoid will produce vibration.An optical fibre vibration sensor 5 is used as the secondary sensing element, measures little solenoidal vibration with it, obtains tested primary current through demodulation.Primary sensing element and primary side voltage are idiostatic, the optical fibre vibration sensor of secondary sensing element self good insulation preformance, so electrodynamic type current transformer based on optical fibre vibration sensor of the present utility model does not need to do interior insulation, shock resistance is good, simple in structure, reliable and stable.Optical fibre vibration sensor 5 links to each other with solenoid 43 in the secondary side sensing head 4, surveys the vibration of solenoid 43.Evidence, the electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model not only can very accurately be measured super-large current, and need not do interior insulation, and do not need magneto-optic glass, do not need to the high-pressure side energy supply, energy Chinese People's Anti-Japanese Military and Political College rush of current, anti-electromagnetic interference (EMI), temperature performance is stable.Electrodynamic type current transformer based on optical fibre vibration sensor described in the utility model has simple in structure, easy to operate, good stability, and the characteristics such as safe and reliable can be widely used in super-large current and detect in the production practices.
Claims (3)
1. based on the electrodynamic type current transformer of optical fibre vibration sensor, include primary side current bus (1), accurate Luo-coil (2), magnetic shielding shell (3), secondary side sensing head (4), optical fibre vibration sensor (5), disposal system (6), soft iron A(41), soft iron B(42), solenoid (43), ring (44) and magnet (45), it is characterized in that accurate Luo-coil (2) is enclosed within on the primary side current bus (1), and be connected with primary side current bus (1) equipotential, accurate Luo-coil (2) links to each other with secondary side sensing head (4) simultaneously, consist of primary sensing element, secondary side sensing head (4) places in the middle of the magnetic shielding shell (3), secondary side sensing head (4) links to each other with optical fibre vibration sensor (5) as the secondary sensing element, and optical fibre vibration sensor (5) links to each other with signal processing system (6).
2. the electrodynamic type current transformer based on optical fibre vibration sensor according to claim 1, it is characterized in that secondary side sensing head (4) is for including the soft iron A(41 with very strong magnetic conduction ability) and soft iron B(42), soft iron A(41) with soft iron B(42) respectively the two poles of the earth with magnet (45) be connected magnetic or outer magnetic structure in consisting of; Solenoid (43) places soft iron A(41) with soft iron B(42) the slit in the middle of, solenoid (43) links to each other with ring (44).
3. the electrodynamic type current transformer based on optical fibre vibration sensor according to claim 1 is characterized in that optical fibre vibration sensor (5) links to each other with solenoid (43) in the secondary side sensing head (4), surveys the vibration of solenoid (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354334 CN202735387U (en) | 2012-07-21 | 2012-07-21 | Electric current transformer based on fiber vibration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354334 CN202735387U (en) | 2012-07-21 | 2012-07-21 | Electric current transformer based on fiber vibration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735387U true CN202735387U (en) | 2013-02-13 |
Family
ID=47661073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220354334 Expired - Fee Related CN202735387U (en) | 2012-07-21 | 2012-07-21 | Electric current transformer based on fiber vibration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202735387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371051A (en) * | 2016-09-23 | 2017-02-01 | 国网江西省电力公司电力科学研究院 | High-voltage electric energy metering device current transformer leakage current eliminating method |
-
2012
- 2012-07-21 CN CN 201220354334 patent/CN202735387U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371051A (en) * | 2016-09-23 | 2017-02-01 | 国网江西省电力公司电力科学研究院 | High-voltage electric energy metering device current transformer leakage current eliminating method |
| CN106371051B (en) * | 2016-09-23 | 2019-01-25 | 国网江西省电力公司电力科学研究院 | A kind of high-voltage electric-energy meter current transformer leakage current removing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203672938U (en) | AC-DC universal leakage-current sensor | |
| CN203191419U (en) | Intelligent electricity meter with diamagnetic structured electromagnetic current transformers | |
| CN103412176A (en) | Real-time and on-line AC/DC arrester current monitoring sensor based on magnetoresistance | |
| CN106645863A (en) | Voltage sensor based on dual fluxgates | |
| Kuang et al. | Magnetic field energy harvesting from current-carrying structures: electromagnetic-circuit coupled model, validation and application | |
| CN106093524A (en) | Magnetic core and current sensor | |
| CN106018912A (en) | High-precision universal alternative and direct current measuring device | |
| CN201820628U (en) | Electronic current and voltage transformer | |
| CN202735387U (en) | Electric current transformer based on fiber vibration sensor | |
| Wu | A wide linearity range current sensor based on piezoelectric effect | |
| CN201319314Y (en) | Current transformer | |
| CN102608380B (en) | Self-induced photoelectric mixed current transformer | |
| CN110146737A (en) | A kind of wide range current sensor based on shunt magnetic structure | |
| CN108802467B (en) | Iron core coil type current transformer with high detection precision and electric leakage detection device | |
| Liu et al. | Simulating the vibration increase of the transformer iron core due to the DC bias | |
| CN102818920B (en) | Current measuring method and device based on electromagnetic force and through optical fibers | |
| CN110836987B (en) | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof | |
| CN204719222U (en) | A kind of portable electronic piece formula current transformer calibration device | |
| CN202549601U (en) | Electric photoelectric hybrid current transformer | |
| CN208156061U (en) | A kind of iron core line ring type current transformer and earth detector that detection accuracy is high | |
| CN202710642U (en) | Improved current sensor | |
| CN202870144U (en) | Current measuring device for breaker or switch cabinet | |
| Ben et al. | Electromagnetic vibration analysis of magnetically controlled reactor considering DC magnetic flux | |
| CN203587739U (en) | groundfault wire selector for transformer substation DC system | |
| CN207051352U (en) | A kind of equipotential shielded type composite electronic type voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20130721 |