CN203772406U - Oil-immersed type transformer vibration online monitoring system with built-in fiber grating sensor - Google Patents
Oil-immersed type transformer vibration online monitoring system with built-in fiber grating sensor Download PDFInfo
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- CN203772406U CN203772406U CN201320887861.7U CN201320887861U CN203772406U CN 203772406 U CN203772406 U CN 203772406U CN 201320887861 U CN201320887861 U CN 201320887861U CN 203772406 U CN203772406 U CN 203772406U
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- 239000000835 fiber Substances 0.000 title claims abstract description 64
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 230000001133 acceleration Effects 0.000 claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims description 35
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000011551 heat transfer agent Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract description 2
- 206010063385 Intellectualisation Diseases 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses an oil-immersed type transformer vibration online monitoring system with a built-in fiber grating sensor. A fiber grating acceleration sensor is distributed in the internal part of a transformer. A quasi-distributed sensing network is formed by utilizing a wavelength division/space division mixed multiplexing technology so that three-dimensional vibration acceleration of the transformer in the operation process of the transformer can be directly measured, a new approach is provided for transformer vibration real-time online monitoring, an effective technical means is provided for accurate assessment of the operation state of the transformer, and reliable support is provided for safe and reliable operation and intellectualization of the transformer.
Description
Technical field
The utility model relates to sensory field of optic fibre and Transformer's Condition Monitoring field, is specifically related to a kind of oil-filled transformer system of condition monitoring of built-in fiber grating sensor.
Background technology
Power transformer is the key equipment of electric system, and the fault of transformer will directly threaten the safe operation of network system, and operating power transformer is realized to on-line monitoring and fault diagnosis can effectively reduce transformer fault rate, reduces operating cost.The vibration of transformer is by the generation of vibration of transformer body and cooling device, and winding is the more parts that break down with iron core, these faults comprise displacement and the distortion etc. of bending unshakable in one's determination, clamping or looseness fault, winding, the vibration performance vector of normal operating transformer can be used as fingerprint reference, transformer exception vibration will cause the variation of vibration fingerprint characteristic vector, thereby, by Real-Time Monitoring and compare of analysis to transformer vibration, can effectively assess transformer core and winding operation conditions.
At present, be mainly to use vibration transducer to be arranged in oil tank of transformer surface to the measurement of transformer vibration, undertaken contrasting fault model data or carrying out fault analysis with the data of the same model transformer that compares after various frequency-domain analysiss by the vibration data collecting at oil tank wall.Because being delivered to oil tank wall after vibration signal by transformer oil, folder from top to bottom, winding etc., transformer body vibration stopped that decay is larger, and it is very large that the vibration of transformer oil tank wall is subject to outer room environmental interference, the true Vibration Condition of device body in can not accurate response transformer operational process, therefore, vibrating to pass judgment on operation conditions unshakable in one's determination by indirect measurement oil tank wall has some limitations.
Summary of the invention
Technical problem to be solved in the utility model is: for solving the directly problem of measurement of oil-filled transformer vibration, and provide a kind of oil-filled transformer system of condition monitoring of built-in fiber grating sensor.
The technical scheme that the utility model adopts is: a kind of oil-filled transformer system of condition monitoring and device of built-in fiber grating sensor, it is characterized in that, connect device, optical fibre grating acceleration sensor, photoelectric commutator, multi-channel signal processing device, data acquisition module, computing machine etc. by scan laser light source, 1 × N fiber coupler, 1 × 2 fiber coupler, multi-channel coupling device expansion module, transmission cable, casing and form.The light source of scanned laser output is divided into N road by 1 × N fiber coupler, 1 × 2 fiber coupler of often leading up to is input to multi-channel coupling device expansion module, built-in multiple 1 × 4 fiber couplers of multi-channel coupling device expansion module, a passage is extended to 4 optical-fibre channels by 1 × 4 fiber coupler, all Channel Synchronous are with scanning frequently, each optical-fibre channel connects device through transmission cable and casing and is connected, connect device through casing and output to again optical fibre grating acceleration sensor, every group of optical fibre grating acceleration sensing connected by two gratings, fiber Bragg grating reflected signal is carried heat transfer agent and is again connected device through casing, transmission cable, multi-channel coupling device expansion module and 1 × 2 fiber coupler incide corresponding photoelectric commutator, reflected light signal is become electric signal by photoelectric commutator, undertaken sending into data acquisition module after analog to digital conversion by multi-channel signal processing device, finally carry out analyzing and processing by computing machine.
The oil-filled transformer system of condition monitoring of built-in fiber grating sensor as above, is characterized in that, described optical fibre grating acceleration sensor adopts packed by metal casing gold-plated processing, realizes waterproof and sealing.The technique effect bringing is thus: avoid the impact of liquid medium damping on optical fibre grating acceleration sensor sensing capabilities.
The oil-filled transformer system of condition monitoring of built-in fiber grating sensor as above, is characterized in that, described optical fibre grating acceleration sensor adopts two fiber grating series connection, and composition double grating structure, measures the vibration in a dimension.The technique effect bringing is thus: this structure not only can realize the auto-compensation of temperature, but also can obtain the sensitivity higher than monochromatic light grid and working frequency range.
The oil-filled transformer system of condition monitoring of built-in fiber grating sensor as above, it is characterized in that, described three groups of optical fibre grating acceleration sensors are combined into three-axis structure, are arranged on it transformer, realize the direct measurement of three-dimensional vibrating acceleration.
The oil-filled transformer system of condition monitoring of built-in fiber grating sensor as above, it is characterized in that, described branched fiber-optic grating sensor adopts series connection, fiber coupler and multi-channel coupling device expansion module, composition wavelength-division/sky point hybrid multiplex optical fiber grating sensing network.The technique effect bringing is thus: utilize to greatest extent the load-bearing capacity of the every passage of demodulating system, save wiring installation cost and system cost.
The beneficial effects of the utility model are: optical fibre grating acceleration sensor is arranged in to transformer inside, utilize wavelength-division/sky point hybrid multiplex technology to form quasi-distributed sensor network, realize the direct measurement to device body three-dimensional vibrating acceleration in transformer operational process, for transformer vibration real time on-line monitoring provides new approach, for the accurate evaluation of running state of transformer provides effective technological means, for the intellectuality that ensures its safety, reliability service and realize transformer provides reliable support.
Brief description of the drawings
Fig. 1 is the oil-filled transformer system of condition monitoring structural representation of the built-in fiber grating sensor of the utility model embodiment.
Fig. 2 is the double optical fiber grating vibration transducer structural representation with temperature self-compensation of the utility model embodiment.
Embodiment
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.Those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in accompanying drawing: 1-scan laser light source, 2-1 × N fiber coupler, 3-1 × 2 fiber coupler, 4-multi-channel coupling device expansion module, 5-transmission cable, 6-casing connects device, 7-optical fibre grating acceleration sensor, 8-photoelectric commutator, 9-multi-channel signal processing device, 10-data acquisition module, 11-computing machine, 701-shell, 702-fiber grating I, 703-fiber grating II, 704-Transmission Fibers, 705-mass, 706-L type semi-girder, 707-spring leaf and 708-support securing member.
As shown in Figure 1, the oil-filled transformer system of condition monitoring of a kind of built-in fiber grating sensor that the utility model provides, is made up of scan laser light source 1,1 × N fiber coupler, 2,1 × 2 fiber coupler 3, multi-channel coupling device expansion module 4, transmission cable 5, casing perforation device 6, optical fibre grating acceleration sensor 7, photoelectric commutator 8, multi-channel signal processing device 9, data acquisition module 10, computing machine 11.
Described system work process is: the light source that scanned laser 1 is exported is divided into N road by 1 × N fiber coupler 2,1 × 2 fiber coupler 3 of often leading up to is input to multi-channel coupling device expansion module 4, built-in multiple 1 × 4 fiber couplers of multi-channel coupling device expansion module 4, a passage is extended to 4 optical-fibre channels by 1 × 4 fiber coupler, and all Channel Synchronous are with scanning frequently; Each optical-fibre channel connects device 6 through transmission cable 5 and casing and is connected, and casing connects device 6 and is arranged on transformer box wall, realizes the transmission of the inside and outside Fibre Optical Sensor signal of transformer, and guarantees non-leakage oil; Light connects device 6 through casing and is transferred to optical fibre grating acceleration sensor 7 again, every group of optical fibre grating acceleration sensing connected by two fiber gratings, fiber Bragg grating reflected signal is carried heat transfer agent and is incided corresponding photoelectric commutator 8 through casing perforation device 6, transmission cable 5, multi-channel coupling device expansion module 4 and 1 × 2 fiber coupler 3 successively again, reflected light signal is become electric signal by photoelectric commutator 8, undertaken sending into data acquisition module 10 after analog to digital conversion by multi-channel signal processing device 9, finally carry out analyzing and processing by computing machine 11.
The structure of described optical fibre grating acceleration sensor 7 as shown in Figure 2, formed by shell 701, fiber grating I702, fiber grating II703, Transmission Fibers 704, mass 705, L-type semi-girder 706, spring leaf 707 and support securing member 708, extraneous vibration causes the variation of fiber grating I702 and fiber grating II703 centre wavelength, realizes the measurement of vibration to external world by demodulating fiber bragg grating wavelength variations.
Described optical fibre grating acceleration sensor 7 adopts packed by metal casing gold-plated processing, realizes waterproof and sealing, avoids the impact of liquid medium damping on optical fibre grating acceleration sensor 7 sensing capabilities.
Described optical fibre grating acceleration sensor 7 adopts two fiber grating series connection, and composition double grating structure, measures the vibration in a dimension, and this structure not only can realize the auto-compensation of temperature, but also can obtain the sensitivity higher than monochromatic light grid and working frequency range.
Described three groups of optical fibre grating acceleration sensors 7 are combined into three-axis structure, are arranged on it transformer, realize the direct measurement of three-dimensional vibrating acceleration.
Described branched fiber-optic grating sensor adopts series connection, fiber coupler and multi-channel coupling device expansion module, composition wavelength-division/sky point hybrid multiplex optical fiber grating sensing network, utilize to greatest extent the load-bearing capacity of the every passage of demodulating system, save wiring installation cost and system cost.
The acceleration transducer of fiber grating uses optical fiber as sensor information, is passive device, and high temperature resistant, high pressure resistant, anticorrosive, anti-electromagnetic interference (EMI) is adapted at transformer internal environment and uses.The utility model is arranged on optical fibre grating acceleration sensor with it transformer, three-dimensional vibrating acceleration by the direct measuring transformer device of fiber grating acceleration sensor in operational process, avoid vibrational waveform by oil tank wall, the transmission of transformer wet goods assembly and the interference of external environment, the device body Vibration Condition in actual response transformer operational process.
These are only embodiment of the present utility model, be not limited to the utility model, therefore, all within spirit of the present utility model and principle, any amendment of making, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (5)
1. the oil-filled transformer system of condition monitoring of a built-in fiber grating sensor, it is characterized in that, by scan laser light source, 1 × N fiber coupler, 1 × 2 fiber coupler, multi-channel coupling device expansion module, transmission cable, casing connects device, three groups of optical fibre grating acceleration sensors, photoelectric commutator, multi-channel signal processing device, data acquisition module, computing machine composition, the light source of scanned laser output is divided into N road by 1 × N fiber coupler, 1 × 2 fiber coupler of often leading up to is input to multi-channel coupling device expansion module, built-in multiple 1 × 4 fiber couplers of multi-channel coupling device expansion module, a passage is extended to 4 optical-fibre channels by 1 × 4 fiber coupler, all Channel Synchronous are with scanning frequently, each optical-fibre channel connects device through transmission cable and casing and is connected, connect device through casing and output to again optical fibre grating acceleration sensor, every group of optical fibre grating acceleration sensing connected by two gratings, fiber Bragg grating reflected signal is carried heat transfer agent and is again connected device through casing, transmission cable, multi-channel coupling device expansion module and 1 × 2 fiber coupler incide corresponding photoelectric commutator, reflected light signal is become electric signal by photoelectric commutator, undertaken sending into data acquisition module after analog to digital conversion by multi-channel signal processing device, finally carry out analyzing and processing by computing machine.
2. the oil-filled transformer system of condition monitoring of built-in fiber grating sensor according to claim 1, is characterized in that, described optical fibre grating acceleration sensor adopts packed by metal casing gold-plated processing, realizes waterproof and sealing.
3. the oil-filled transformer system of condition monitoring of built-in fiber grating sensor according to claim 1, it is characterized in that, described optical fibre grating acceleration sensor adopts two fiber grating series connection, and composition double grating structure, measures the vibration in a dimension.
4. the oil-filled transformer system of condition monitoring of built-in fiber grating sensor according to claim 1, it is characterized in that, described three groups of optical fibre grating acceleration sensors are combined into three-axis structure, are arranged on it transformer, realize the direct measurement of three-dimensional vibrating acceleration.
5. the oil-filled transformer system of condition monitoring of built-in fiber grating sensor according to claim 1, it is characterized in that, described branched fiber-optic grating sensor adopts series connection, fiber coupler and multi-channel coupling device expansion module, composition wavelength-division/sky point hybrid multiplex optical fiber grating sensing network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887861.7U CN203772406U (en) | 2013-12-31 | 2013-12-31 | Oil-immersed type transformer vibration online monitoring system with built-in fiber grating sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320887861.7U CN203772406U (en) | 2013-12-31 | 2013-12-31 | Oil-immersed type transformer vibration online monitoring system with built-in fiber grating sensor |
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| CN203772406U true CN203772406U (en) | 2014-08-13 |
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| CN201320887861.7U Expired - Lifetime CN203772406U (en) | 2013-12-31 | 2013-12-31 | Oil-immersed type transformer vibration online monitoring system with built-in fiber grating sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743464A (en) * | 2013-12-31 | 2014-04-23 | 国网电力科学研究院武汉南瑞有限责任公司 | Oil-immersed transformer vibration on-line monitoring system with built-in optical fiber grating sensor |
| US11585692B2 (en) * | 2019-10-24 | 2023-02-21 | Palo Alto Research Center Incorporated | Fiber optic sensing system for grid-based assets |
| US11719559B2 (en) | 2019-10-24 | 2023-08-08 | Palo Alto Research Center Incorporated | Fiber optic sensing system for grid-based assets |
-
2013
- 2013-12-31 CN CN201320887861.7U patent/CN203772406U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743464A (en) * | 2013-12-31 | 2014-04-23 | 国网电力科学研究院武汉南瑞有限责任公司 | Oil-immersed transformer vibration on-line monitoring system with built-in optical fiber grating sensor |
| US11585692B2 (en) * | 2019-10-24 | 2023-02-21 | Palo Alto Research Center Incorporated | Fiber optic sensing system for grid-based assets |
| US11719559B2 (en) | 2019-10-24 | 2023-08-08 | Palo Alto Research Center Incorporated | Fiber optic sensing system for grid-based assets |
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Granted publication date: 20140813 |