CN206574590U - A kind of protection device of power system - Google Patents
A kind of protection device of power system Download PDFInfo
- Publication number
- CN206574590U CN206574590U CN201720304947.0U CN201720304947U CN206574590U CN 206574590 U CN206574590 U CN 206574590U CN 201720304947 U CN201720304947 U CN 201720304947U CN 206574590 U CN206574590 U CN 206574590U
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- Prior art keywords
- pressure winding
- sensor fibre
- power system
- coupler
- protection device
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- 239000000835 fiber Substances 0.000 claims abstract description 50
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- 230000013011 mating Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000010365 information processing Effects 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 239000013307 optical fiber Substances 0.000 description 12
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
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- 239000004744 fabric Substances 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of protection device of power system, it is therefore intended that, the local state of monitoring substation transformer, while sending running scheduling monitoring center to, it is to avoid power failure, the technical scheme used for：Including transformer (6), high pressure winding (1) is provided with transformer (6), low pressure winding (3) is provided with the inside of high pressure winding (1), the inner central of the low pressure winding (3) sets cored (5), some sensor fibres (2) are wound with the high pressure winding (1) or low pressure winding (3), the sensor fibre (2) can produce deformation, sensor fibre (2) boundling composition optical cable (4) with high pressure winding (1) or low pressure winding (3)；The optical cable (4), which is connected to, can detect transformer station's detection mating portions (7) of sensor fibre (2) deformation.
Description
Technical field
The utility model belongs to power domain, and in particular to a kind of protection device of power system.
Background technology
In power system actual motion, generation and often related to the mode of monitoring, the power network of China of prevention of accident
Spread all over wide, be connected to city and border area, be connected to plateau and desert, transformer station is used as the important pivot of power system, moment
Pick-up electric power, and some transformer station geographical position are remoter, have inconvenient traffic, such as a wide range of low temperature sleet, or freezing disaster, line
Short out road or inner body aging, all easily break down, such as failure is found not in time, will become major break down by glitch,
Cause whole relay system to be destroyed, in turn result in large-scale power failure, therefore we need a kind of simple and practical, safety spirit
Quick protection device monitors the state that substation transformer is local, while sending running scheduling monitoring center to.
The content of the invention
It is simple real the utility model proposes a kind of protection device of power system in order to solve the problems of the prior art
With safety sensitive can monitor the local state of substation transformer, while sending running scheduling monitoring center to, it is to avoid electricity
Power failure.
In order to realize the above object the technical scheme that is used of the utility model for：Including transformer, set in transformer
Have and low pressure winding is provided with the inside of high pressure winding, high pressure winding, the inner central of the low pressure winding sets cored, described
Some sensor fibres are wound with high pressure winding or low pressure winding, the sensor fibre can be with high pressure winding or low pressure winding
Produce deformation, sensor fibre boundling composition optical cable；The optical cable, which is connected to, can detect transformer station's detection of sensor fibre deformation
Mating portions.
Light-metering box that transformer station detection mating portions include being sequentially connected, the first isolator, Polarization Controller, it is polarized
Device, polarization-maintaining isolator, coupler component, photo-detector, the second isolator and A/D converter, A/D converter are connected to letter
Processing end is ceased, the sensor fibre is connected to coupler component.
The first EDFA, second isolator and analog/digital conversion are provided between first isolator and Polarization Controller
The 2nd EDFA is provided between device.
The coupler component includes the coupler of several series connection, and every sensor fibre is connected with a coupler.
The coupler is 90%/10% photo-coupler.
The light-metering box includes laser pulse generator and receiver.
The sensor fibre uses single-mode fiber.
Compared with prior art, the range of strain and temperature that the utility model is deformed using sensor fibre measuring transformer become
Change scope, by sensor fibre tightly around on the high pressure winding or low pressure winding being entangled in transformer, when high pressure winding or low pressure winding
When deforming, sensor fibre deforms accordingly, and deformation causes radiation mode to change, radiation mode increase or reduction, so that
The loss and output of sensor fibre or input optical power are changed, and using this feature, mating portions are detected by transformer station
Analysis to optical fiber output luminous power frequency spectrum, can judge whether transformer deforms and deformation extent, and by dorsad
The measurement of scattered light, can complete the judgement for occurring position to flexural deformation.The utility model is simple and practical, safety sensitive,
Structure optimization has been carried out to cloth optical link, has been easy to distributed expansion, the local state of substation transformer can have effectively been monitored, simultaneously
Send scheduling monitoring center to, protect the safety of power system.
Further, there are laser pulse generator and receiver in light-metering box OTDR, the light of specific frequency and power can be sent
Pulse, and be coupled to by coupler in sensor fibre, the scattered light in sensor fibre again returns to incidence end, then through coupler
The entering light in sensor fibre is coupled, entering light detects its power and be converted into electric signal by photo-detector, then amplify through EDFA,
Filtering, carries out data signal conversion through A/D converter, result finally is sent into information processing end, is monitored, and monitors optical fiber
Backscattering light data, can determine whether out the position that flexural deformation occurs, photo-detector can also obtain the spectrum signature of luminous power
Figure, and according to the change of Output optical power spectrogram, judge the degree of flexural deformation.
Further, the single-mode fiber of sensor fibre preferred pair temperature-insensitive and high temperature resistance, eliminates temperature to measurement result
Influence.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation that mating portions detect in transformer station；
Fig. 3 is that sensor fibre couples schematic diagram；
Fig. 4 is sensor fibre crooked sensory partial schematic diagram；
Fig. 5 is test sensor fibre with warm variation characteristic schematic diagram；
Fig. 6 is test sensor fibre with curvature Variation schematic diagram；
In figure, 1- high pressures winding, 2- sensor fibres, 3- low pressure windings, 4- optical cables, 5- iron cores, 6- transformers, 7- transformer stations
Monitor mating portions.
Embodiment
Accompanying drawing is said with reference to specific embodiment and explanation the utility model is further explained explanation.
Referring to Fig. 1, the utility model includes being provided with high pressure winding 1 in transformer 6, transformer 6, high pressure winding 1 it is interior
Side is provided with low pressure winding 3, and the inner central of low pressure winding 3 is set to be wound with cored 5, high pressure winding 1 or low pressure winding 3
Some sensor fibres 2, sensor fibre 2 can produce deformation, the boundling of sensor fibre 2 composition with high pressure winding 1 or low pressure winding 3
Optical cable 4；Optical cable 4, which is connected to, can detect transformer station's detection mating portions 7 of the deformation of sensor fibre 2.
Referring to Fig. 2, transformer station's detection mating portions 7 include the light-metering box being sequentially connected, the first isolator, the polarizer, guarantor
Inclined isolator, coupler component, photo-detector, the second isolator and A/D converter, A/D converter are connected at information
End is managed, sensor fibre 2 is connected to coupler component.Be provided with the first EDFA between first isolator and Polarization Controller, second every
From being provided with the 2nd EDFA between device and A/D converter.Coupler component includes the coupler of several series connection, every sense light
Fibre 2 is connected with a coupler, and coupler is 90%/10% photo-coupler, and light-metering box includes laser pulse generator and reception
Device.Sensor fibre 2 is using the single-mode fiber to temperature-insensitive and high temperature resistance.
Referring to Fig. 1, the utility model includes sensor fibre 2, transformer 6 and electrical substation monitoring mating portions 7, transformer 6
High pressure winding 1 is contained in inside, and the inner side of high pressure winding 1 is equipped with low pressure winding 3, and the inner central of low pressure winding 3 is equipped with iron core 5；Sensing
Optical fiber 2 is tightly wrapped in high pressure winding 1 or low pressure winding 3, the boundling of sensor fibre 2 composition optical cable 4, the inspection of the connection of optical cable 4 transformer station
Survey mating portions 7.Electrical substation monitoring mating portions 7 include a light-metering box, and light-metering box connects the first isolator, the first isolation
Device passes through the first EDFA connection Polarization Controllers and the polarizer, polarizer connection polarization-maintaining isolator, the connection coupling of polarization-maintaining isolator
Device assembly.
Sensor fibre 2 in optical cable 4 is respectively connecting to the coupler of one group of series connection, and every sensor fibre 2 connects a coupling
Clutch, coupler connection photo-detector, photo-detector connect the second isolator, the second isolator by the 2nd EDFA connections mould/
Number converter, A/D converter is connected to information processing end.Photo-coupler is specially 90%/10% photo-coupler.
Referring to Fig. 3 and Fig. 4, the range of strain and range of temperature of measuring transformer deformation, sensor fibre preferable temperature
Insensitive and high temperature resistance optical fiber.By sensor fibre tightly around on the high pressure winding or low pressure winding being entangled in transformer, work as high pressure
When winding deforms, sensor fibre deforms accordingly, and deformation causes radiation mode to change, radiation mode increase or reduction, from
And the loss and output of sensor fibre or input optical power is changed；During implementation, using this feature, by optical fiber
The analysis of Output optical power frequency spectrum, can judge whether transformer deforms and deformation extent, and by back-scattering light
Measurement, those skilled in the art can complete to flexural deformation occur position judgement.
Referring to Fig. 3, there are laser pulse generator and receiver in light-metering box OTDR, the light of specific frequency and power can be sent
Pulse, and be coupled to by coupler in optical fiber, the scattered light in optical fiber again returns to incidence end, then couples sensing through coupler
Entering light in optical fiber, entering light detects its power and is converted into electric signal by photo-detector, then amplifies through EDFA, filters, warp
A/D converter carries out data signal conversion, and result finally is sent into information processing end, is monitored, and monitoring optical fiber is dorsad
Light data is scattered, the position that flexural deformation occurs is can determine whether out, photo-detector can also obtain the spectrum signature figure of luminous power, and root
According to the change of Output optical power spectrogram, the degree of flexural deformation is judged.
Referring to Fig. 5 and Fig. 6, sensor fibre preferably eliminates the influence of temperature with temperature-resistant single-mode fiber, and
Curvature measurement is carried out, test temperature provides initial reference data from 0-100 DEG C of change for detection.
Utility model works principle is, it is assumed that the optical signal power of input is arbitrfary point on Pi, optical fiber apart from optical fiber
Incidence end is S, then the luminous power at this is：
As is fiber attenuation coefficient, and such as light is scattered at incidence end S ' places, then back-scattering light returns to the light work(of incidence end
Rate is：
B (S ') is the backscattering coefficient that optical fiber is put in S '；As ' (x) is dorsad attenuation coefficient.As transformer bends
Deformation, sensor fibre also deformation or shake therewith causes radiation mode to change, the transmission mould in fibre core, and a part turns into spoke
Mould is penetrated, another part becomes tunnelling ray, so that the loss of luminous energy also changes therewith.Photo-detector can sense loss, and letter
Number reach information processing end in real time, person skilled can detect the deformation of transformer in power system, and respond or failure at
Reason.
Claims (7)
1. it is provided with high voltage winding in a kind of protection device of power system, it is characterised in that including transformer (6), transformer (6)
Low pressure winding (3) is provided with the inside of group (1), high pressure winding (1), the inner central of the low pressure winding (3) sets cored
(5) some sensor fibres (2), are wound with the high pressure winding (1) or low pressure winding (3), the sensor fibre (2) can
Deformation, sensor fibre (2) boundling composition optical cable (4) are produced with high pressure winding (1) or low pressure winding (3)；Optical cable (4) connection
Transformer station's detection mating portions (7) of sensor fibre (2) deformation can extremely be detected.
2. the protection device of a kind of power system according to claim 1, it is characterised in that transformer station's detection is supporting
Partly (7) include the light-metering box being sequentially connected, the first isolator, Polarization Controller, the polarizer, polarization-maintaining isolator, coupler group
Part, photo-detector, the second isolator and A/D converter, A/D converter are connected to information processing end, the sensor fibre
(2) it is connected to coupler component.
3. a kind of protection device of power system according to claim 2, it is characterised in that first isolator with partially
Shake and be provided with the first EDFA between controller, the 2nd EDFA is provided between second isolator and A/D converter.
4. the protection device of a kind of power system according to claim 2, it is characterised in that the coupler component includes
The coupler of several series connection, every sensor fibre (2) is connected with a coupler.
5. a kind of protection device of power system according to claim 4, it is characterised in that the coupler is 90%/
10% photo-coupler.
6. the protection device of a kind of power system according to claim 2, it is characterised in that the light-metering box includes laser
Impulse generator and receiver.
7. the protection device of a kind of power system according to claim 1, it is characterised in that the sensor fibre (2) is adopted
Use single-mode fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720304947.0U CN206574590U (en) | 2017-03-27 | 2017-03-27 | A kind of protection device of power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720304947.0U CN206574590U (en) | 2017-03-27 | 2017-03-27 | A kind of protection device of power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206574590U true CN206574590U (en) | 2017-10-20 |
Family
ID=60053090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720304947.0U Active CN206574590U (en) | 2017-03-27 | 2017-03-27 | A kind of protection device of power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206574590U (en) |
-
2017
- 2017-03-27 CN CN201720304947.0U patent/CN206574590U/en active Active
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