CN106353554A - Three-phase total box optical electronic current mutual inductor which is adopted by GIS - Google Patents
Three-phase total box optical electronic current mutual inductor which is adopted by GIS Download PDFInfo
- Publication number
- CN106353554A CN106353554A CN201610714985.3A CN201610714985A CN106353554A CN 106353554 A CN106353554 A CN 106353554A CN 201610714985 A CN201610714985 A CN 201610714985A CN 106353554 A CN106353554 A CN 106353554A
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- China
- Prior art keywords
- current sensor
- gis
- housing
- mutual inductor
- installing plate
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- 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.)
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Classifications
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- 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
Abstract
The invention discloses a three-phase total box optical electronic current mutual inductor which is adopted by GIS, includes high voltage current sensor unit, signal acquisition unit and shell, high voltage current sensing unit and signal acquisition unit are both set on the shell, among them, high voltage current sensor unit includes three full optical fiber current sensor and optical fiber cable, full optical fiber current sensor is connected to the signal acquisition unit by the cable, three full optical fiber current sensors are distributed on the shell, conductive rod goes through the center of the corresponding full optical fiber current sensor, sealed chamber is set inside the shell, inert gases are filled inside the sealed chamber, intersection between conductive rods and the corresponding full optical fiber current sensor is set inside the sealed chamber. It's less interfered by medium & strong electromagnetic in the substation, with a reliable sealing performance and insulation, and makes signal to transmit in a more stable way, assures the long-term operation stability of the actual project, effectively avoids the possibility of failure in a complex environment.
Description
Technical field
The present invention relates to high voltage electrical apparatus technical field is and in particular to a kind of gis of three-phase combined type optics electronic current
Transformer.
Background technology
Growing with optical current sensor, optical pickocff is increasing in the application of power industry.Becoming
In power station, electromagnetic environment is extremely complex, compares conventional telecommunications number transmission, and optical signal transmission can be prevented effectively from signals transmission
The situation that distortion occurs occurs.
Gis high-tension switch gear is wide variety of switchgear in high voltage substation in recent years, but its biography of using
System transformer does not more and more adapt to the development need of intelligent grid, and its secondary output adopts the signal of telecommunication, by transformer station's electricity
Magnetic disturbance impact is larger.Developing a kind of gis optics electric mutual inductor can effectively solving the problems referred to above.
Content of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, there is provided a kind of three-phase is altogether
The gis of case optics electronic current mutual inductor, is affected little by strong electromagnetic in transformer station, have reliable sealing property and
Insulating properties, make signal transmission more stable it is ensured that Practical Project longtime running stability, effectively prevent in complicated ring
The probability of fault is produced in border.
The present invention be the technical scheme is that by solving above-mentioned technical problem
A kind of gis of three-phase combined type optics electronic current mutual inductor, including high-tension current sensing unit, signals collecting
Unit and housing, high-tension current sensing unit and signal gathering unit may be contained within housing, wherein, high-tension current sensing unit
Including 3 all-fiber current sensors and optical cable, all-fiber current sensor is connected with signal gathering unit by optical cable, 3
All-fiber current sensor is distributed on housing, and 3 conducting rods are corresponded with 3 all-fiber current sensors respectively, conductive
Bar passes through from the center of corresponding all-fiber current sensor, is provided with sealed air chamber in housing, is filled with indifferent gas in sealed air chamber
Body, conducting rod is arranged in sealed air chamber with the cross point of corresponding all-fiber current sensor.
According to technique scheme, in sealed air chamber, it is filled with the noble gases of 1～5 atmospheric pressure, described noble gases are
Sulfur hexafluoride gas.
According to technique scheme, housing top and bottom are equipped with end cap, between the side wall of the side of end cap and housing
Leave gap, be provided with installing plate along gap in housing, the top and bottom of installing plate pass through bolt respectively with upper end cover and lower end
Lid is connected, and is provided with supported flange between the side wall of installing plate and housing, and supported flange passes through sealing bolt and installing plate pressure
Fasten connection, supported flange be close to inner walls setting, be provided between installing plate and supported flange in seal groove, installing plate and
Supported flange is provided with shrinkage pool, and seal groove is distributed in the both sides of shrinkage pool, and all-fiber current sensor two ends are fixed in seal groove,
The middle part of all-fiber current sensor is arranged in shrinkage pool, is provided with insulated enclosure plate in the seal groove at shrinkage pool edge, installing plate and
It is provided with insulated enclosure plate, end cap, housing, installing plate, supported flange constitute sealing together with insulated enclosure plate between supported flange
Air chamber, is arranged in the middle part of high-voltage current sensor in sealed air chamber, and optical cable is passed through from installing plate in one end of high-voltage current sensor
Seal groove and supported flange between is passed and is connected with harvester outside housing.
According to technique scheme, installing plate and supported flange, all using metal material, can suppress the phase within transformer
Between disturb, insulated enclosure plate is non-magnetic insulant.
According to technique scheme, insulated enclosure plate adopts politef to add aluminium oxide.
According to technique scheme, it is provided with the second sealing ring between end cap and installing plate, it is close that sealing bolt is provided with first
Seal, insulated enclosure plate is arranged with o type sealing ring.
According to technique scheme, signal gathering unit is harvester, inside be provided with the photoelectric conversion module being sequentially connected,
Ad modular converter and MICROCOMPUTER PROCESSING module.The light intensity signal being produced by all-fiber current sensor converts via light Denso die change block
For analog voltage signal, then digital signal is produced by a/d modular converter, be input in MICROCOMPUTER PROCESSING module, calculate once
Electric current is simultaneously passed along backstage.
According to technique scheme, in MICROCOMPUTER PROCESSING module, embed Phase Compensation Algorithm, using short-data windows Phase-shifting algorithm,
The phase deviation that conditioned signal produces in transmitting procedure again, accurately reflects the actual value of primary current, improves the survey of transformer
Accuracy of measurement.
According to technique scheme, optical cable and harvester are connected by aviation socket, and air plug is set using double-level-metal armor
Meter.
According to technique scheme, MICROCOMPUTER PROCESSING module core processor adopts field programmable gate array fpga.
The method have the advantages that
The secondary singal of transformer is transmitted through Fibre Optical Sensor and adopts light intensity signal to implement, and is done by strong electromagnetic in transformer station
Disturb that impact is little, the cross point of conducting rod and all-fiber current sensor is arranged in sealed air chamber, has reliable sealing property
And insulating properties, make signal transmission more stable it is ensured that Practical Project longtime running stability, effectively prevent in complexity
The probability of fault is produced in environment.
Brief description
Fig. 1 is the structural representation with optics electronic current mutual inductor for the gis of three-phase combined type in the embodiment of the present invention；
Fig. 2 is harvester signal processing flow figure in the embodiment of the present invention；
Fig. 3 is leading phase phase shift figure in the embodiment of the present invention；
Fig. 4 is lagging phase phase shift figure in the embodiment of the present invention；
In figure, 1- all-fiber current sensor, 2- insulated enclosure plate, 3-o type sealing ring, 4- sealing bolt, 5- installing plate,
6- supported flange, 7- housing, 8- optical cable, 9- harvester, 10- conducting rod, 11- first sealing ring, 12- second sealing ring.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Shown in reference Fig. 1～Fig. 2, the gis optics electronic type of the three-phase combined type in the embodiment that the present invention provides
Current transformer, including high-tension current sensing unit, signal gathering unit and housing 7, high-tension current sensing unit and signal are adopted
Collection unit may be contained within housing 7, and wherein, high-tension current sensing unit includes 3 all-fiber current sensors 1 and optical cable 8, entirely
Fibre optic current sensor 1 is connected with signal gathering unit by optical cable 8, and 3 all-fiber current sensors 1 are uniformly distributed in housing
On 7,3 conducting rods 10 are corresponded with 3 all-fiber current sensors 1 respectively, and conducting rod 10 is from corresponding full optical-fiber current
The center of sensor 1 passes through, 3 conducting rods 10 respectively with three-phase high-voltage connection, be provided with sealed air chamber in housing 7, sealing
It is filled with noble gases, conducting rod 10 is arranged in sealed air chamber with the cross point of corresponding all-fiber current sensor 1 in air chamber；Mutually
The secondary singal of sensor is transmitted through Fibre Optical Sensor and adopts light intensity signal to implement, and is affected little by strong electromagnetic in transformer station,
Conducting rod 10 is arranged in sealed air chamber with the cross point of all-fiber current sensor 1, has reliable sealing property and insulation
Property, make signal transmission more stable it is ensured that Practical Project longtime running stability, effectively prevent in complex environment
Produce the probability of fault.
Further, it is filled with the noble gases of 1～5 atmospheric pressure in sealed air chamber, described noble gases are sulfur hexafluoride
Gas.
Further, housing 7 top and bottom are equipped with end cap, leave seam between the side wall of the side of end cap and housing 7
Gap, is provided with installing plate 5 along gap in housing 7, and the top and bottom of installing plate 5 are passed through bolt and connected with upper end cover and bottom end cover respectively
Connect fixation, between the side wall of installing plate 5 and housing 7, be provided with supported flange 6, supported flange 6 passes through sealing bolt 4 and installing plate 5
It is fixed connection, the setting of housing 7 inwall is close to by supported flange 6, is provided with seal groove between installing plate 5 and supported flange 6, peace
Dress plate 5 and supported flange 6 are provided with shrinkage pool, and seal groove is distributed in the both sides of shrinkage pool, and all-fiber current sensor 1 two ends are fixed on
In seal groove, the middle part of all-fiber current sensor 1 is arranged in shrinkage pool, is provided with insulated enclosure plate in the seal groove at shrinkage pool edge
2, it is provided with insulated enclosure plate 2 between installing plate 5 and supported flange 6, end cap, housing 7, installing plate 5, supported flange 6 and insulation are close
Shrouding 2 constitutes sealed air chamber together, is arranged in sealed air chamber in the middle part of high-voltage current sensor, one end of high-voltage current sensor
Passed by seal groove between installing plate 5 and supported flange 6 for the optical cable 8 and be connected with harvester 9 housing 7.
Further, installing plate 5 and supported flange 6, all using metal material, can suppress the interphase interference within transformer,
Insulated enclosure plate 2 is non-magnetic insulant, simultaneously also be hard material it is ensured that sensor acquisition to every phase signals do not subtract
Weak.
Further, rigid insulation sealing plate 2 adopts politef to add aluminium oxide, and politef adds aluminium oxide
Material not magnetic conduction, hardness is high, and good insulation preformance is not it is ensured that the primary current signal that current sensor collects weakens.
Further, it is provided with the second sealing ring 12 between end cap and installing plate 5, sealing bolt 4 is provided with the first sealing ring
11, insulated enclosure plate 2 is arranged with o type sealing ring 3, seals in the carrying out of each seam of sealed air chamber, make the close of sealed air chamber
Envelope effect is more preferable.
Further, signal gathering unit is harvester 9, and inside is provided with the photoelectric conversion module being sequentially connected, ad conversion
Module and MICROCOMPUTER PROCESSING module.The light intensity signal being produced by all-fiber current sensor 1 is converted into mould via light Denso die change block
Intend voltage signal, then digital signal is produced by a/d modular converter, be input in MICROCOMPUTER PROCESSING module, calculate primary current
And it is passed along backstage.
Further, embed Phase Compensation Algorithm in MICROCOMPUTER PROCESSING module, using short-data windows Phase-shifting algorithm, conditioned signal
The phase deviation producing in transmitting procedure again, accurately reflects the actual value of primary current, improves the certainty of measurement of transformer；Micro-
Phase Compensation Algorithm is embedded, using short-data windows Phase-shifting algorithm, conditioned signal produces in transmitting procedure again in machine processing module
Phase deviation, accurately reflects the actual value of primary current, improves the certainty of measurement of transformer.
Further, optical cable 8 and harvester 9 are connected by aviation socket, and air plug adopts double-level-metal armor to design.
Further, MICROCOMPUTER PROCESSING module core processor adopts field programmable gate array fpga.
In one embodiment of the present of invention, the operation principle of the present invention:
Apparatus of the present invention include high-tension current sensing unit, housing 7 and signal gathering unit.High-tension current sensing unit bag
Include all-fiber current sensor 1, optical cable 8 and end plug connector.Three all-fiber current sensors 1 are contained in every transformer,
The axis of housing 7 relatively is divided equally, and each sensor is fixed by screws on installing plate 5, and three conducting rods 10 are respectively from each
The center of the all-fiber current sensor 1 of phase passes through.When conducting rod 10 passes through electric current, all-fiber current sensor 1 produces light
Strong signal, is transmitted to harvester 9 by optical cable 8.1-5 atmospheric pressure is filled inside the gis optics electric mutual inductor of three-phase combined type
Sulfur hexafluoride gas, are sealed in the plenum interior being formed by installing plate 5, supported flange 6, housing 7, rigid insulation sealing plate 2, lead to
Cross sealing ring 3, sealing ring 11, sealing ring 12 and extraneous air isolation to open.Sealing ring 3 is placed on rigid insulation sealing plate 2 both sides,
Installing plate 5, supported flange 6, rigid insulation sealing plate 2 compression by housing 7 external rings around one circle bolt sealing ring 3 is compressed
In the seal groove in installing plate 5, supported flange 6.Except housing 7 external rings around one circle bolt in addition to, plenum interior install
It is ensured that three sealing ring 3 uniform force in Fig. 1, on sealing ring, each point bears enough compressions to sealing bolt 4
Power.Installing plate 5, supported flange 6 adopt metal material, can suppress the interphase interference within transformer, and rigid insulation sealing plate 2 is adopted
Add aluminium oxide with politef, this material not magnetic conduction, hardness is high, and good insulation preformance is it is ensured that every phase of arriving of sensor acquisition
Signal does not weaken.Wherein: optical cable 8 and harvester 9 are connected by aviation socket, air plug adopts double-level-metal armor to design.Sealing
Bolt 4 adopts the passivation bolt of special handling, will not produce chemical reaction inside sulfur hexafluoride gas.
Signal gathering unit is harvester 9, and inside comprises photoelectric conversion module, ad modular converter, MICROCOMPUTER PROCESSING module.Its
The core processor of middle MICROCOMPUTER PROCESSING module adopts fpga.The light intensity signal being produced by all-fiber current sensor 1 is via photoelectricity
Dress die change block is converted into analog voltage signal, then produces digital signal by a/d modular converter, is input to MICROCOMPUTER PROCESSING module
Interior, calculate primary current and be passed along backstage.Signal a series of data encoding, transmission, decoding etc. operation after, necessarily
The change of phase place can be produced, in order to reduce error, MICROCOMPUTER PROCESSING module carries out phase compensation, be calculated using short-data windows phase shift
Method, specific implementation is as follows: if sampled signal is delayedAngle, the sample rate current of t is i (t)=imSin (ω t+ θ) is right
The vector answered isThe sample rate current of a sampled point is thereonCorresponding vector isSampling number for each cycle.Phase place is advancedThe electric current of angle is represented by
Corresponding vector isThe visible Fig. 3 of its vector relations,
IfWherein a, b are coefficient, be can get according to Fig. 3:
WhereinThus can obtain the value of coefficient a, b:
ThereforeRewritable one-tenth
It is converted into sampled value can be calculatedI.e. the neighbouring sample point of two electric currents i (t) can obtain
To leading currentThe sampled value of angle, reaches phase modulation purpose.
Similar, delayed phaseThe electric current of angle, such as Fig. 4, can be calculated, lagging current
After the method, transformer can more accurately reflect the actual value of primary current, improves the measurement of transformer
Precision.
In addition, in the present invention, the temperature of current sensor present position is by being arranged within installing plate 5, supported flange 6
Temperature sensor transfers data to harvester 9.Electric mutual inductor is directly reliably connected with grounded screen, with gis loop on other
Equipment is relatively independent, it is to avoid the impact that signal gathering unit internal components produced due to local overvoltage.
Above be only presently preferred embodiments of the present invention, certainly the interest field of the present invention can not be limited with this,
The equivalence changes therefore made according to scope of the present invention patent, still belong to protection scope of the present invention.
Claims (10)
1. a kind of gis of three-phase combined type is sensed singly it is characterised in that including high-tension current with optics electronic current mutual inductor
Unit, signal gathering unit and housing, high-tension current sensing unit and signal gathering unit may be contained within housing, wherein, high pressure
Current sensing unit includes 3 all-fiber current sensors and optical cable, and all-fiber current sensor passes through optical cable and signals collecting
Unit connects, and 3 all-fiber current sensors are distributed on housing, 3 conducting rods respectively with 3 all-fiber current sensors one
One is corresponding, and conducting rod passes through from the center of corresponding all-fiber current sensor, is provided with sealed air chamber, in sealed air chamber in housing
It is filled with noble gases, conducting rod is arranged in sealed air chamber with the cross point of corresponding all-fiber current sensor.
2. the gis of three-phase combined type according to claim 1 with optics electronic current mutual inductor it is characterised in that sealing
It is filled with the noble gases of 1～5 atmospheric pressure, described noble gases are sulfur hexafluoride gas in air chamber.
3. the gis of three-phase combined type according to claim 1 with optics electronic current mutual inductor it is characterised in that housing
Top and bottom are equipped with end cap, leave gap between the side wall of the side of end cap and housing, are provided with installation along gap in housing
Plate, the top and bottom of installing plate are connected with upper end cover and bottom end cover respectively by bolt, the side wall of installing plate and housing
Between be provided with supported flange, supported flange is fixed with installing plate by sealing bolt and is connected, and supported flange is close in housing
Wall is arranged, and is provided with seal groove between installing plate and supported flange, and installing plate and supported flange are provided with shrinkage pool, and seal groove is distributed
In the both sides of shrinkage pool, all-fiber current sensor two ends are fixed in seal groove, and the middle part of all-fiber current sensor is arranged at
In shrinkage pool, in the seal groove at shrinkage pool edge, it is provided with insulated enclosure plate, between installing plate and supported flange, be provided with insulated enclosure plate, end
Lid, housing, installing plate, supported flange constitute sealed air chamber together with insulated enclosure plate, are arranged in the middle part of high-voltage current sensor
In sealed air chamber, by optical cable, the seal groove between installing plate and supported flange passes shell for one end of high-voltage current sensor
It is connected with harvester in vitro.
4. the gis of three-phase combined type according to claim 3 with optics electronic current mutual inductor it is characterised in that install
Plate and supported flange, all using metal material, can suppress the interphase interference within transformer, and insulated enclosure plate is non-magnetic exhausted
Edge material.
5. the gis of three-phase combined type according to claim 3 with optics electronic current mutual inductor it is characterised in that insulation
Sealing plate adopts politef to add aluminium oxide.
6. the gis of three-phase combined type according to claim 3 with optics electronic current mutual inductor it is characterised in that end cap
It is provided with the second sealing ring and installing plate between, sealing bolt is provided with the first sealing ring, insulated enclosure plate is arranged with the sealing of o type
Circle.
7. the gis of three-phase combined type according to claim 1 with optics electronic current mutual inductor it is characterised in that signal
Collecting unit is harvester, and inside is provided with the photoelectric conversion module being sequentially connected, ad modular converter and MICROCOMPUTER PROCESSING module.By complete
The light intensity signal that fibre optic current sensor produces is converted into analog voltage signal via light Denso die change block, then is changed by a/d
Module produces digital signal, is input in MICROCOMPUTER PROCESSING module, calculates primary current and be passed along backstage.
8. the gis of three-phase combined type according to claim 7 with optics electronic current mutual inductor it is characterised in that microcomputer
Phase Compensation Algorithm is embedded in processing module, using short-data windows Phase-shifting algorithm, the phase that conditioned signal produces in transmitting procedure again
Position deviation, accurately reflects the actual value of primary current, improves the certainty of measurement of transformer.
9. the gis of three-phase combined type according to claim 7 with optics electronic current mutual inductor it is characterised in that optical cable
It is connected by aviation socket with harvester, air plug adopts double-level-metal armor to design.
10. the gis of three-phase combined type according to claim 7 with optics electronic current mutual inductor it is characterised in that microcomputer
Processing module core processor adopts field programmable gate array fpga.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714985.3A CN106353554A (en) | 2016-08-24 | 2016-08-24 | Three-phase total box optical electronic current mutual inductor which is adopted by GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714985.3A CN106353554A (en) | 2016-08-24 | 2016-08-24 | Three-phase total box optical electronic current mutual inductor which is adopted by GIS |
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| Publication Number | Publication Date |
|---|---|
| CN106353554A true CN106353554A (en) | 2017-01-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610714985.3A Pending CN106353554A (en) | 2016-08-24 | 2016-08-24 | Three-phase total box optical electronic current mutual inductor which is adopted by GIS |
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| CN (1) | CN106353554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332112A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | A kind of integrated system of electronic current mutual inductor and breaker |
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| CN107332112A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | A kind of integrated system of electronic current mutual inductor and breaker |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170616 Address after: 071000 No. 5999, North Third Ring Road, Hebei, Baoding Applicant after: BAODING SIFANGSANYI ELECTRIC CO., LTD. Applicant after: Beijing Sifang Jibao Automation Co., Ltd. Applicant after: Beijing Sifang maintenance automation Limited by Share Ltd Sifang relay protection (Wuhan) Software Co., Ltd. Address before: 430223, Hubei, East Lake province Wuhan New Technology Development Zone, soup Road, Hubei Road, No. 33, China workers' science and technology park innovation base, 18, 7, 08 rooms Applicant before: Sifang relay (Wuhan) Software Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |