CN202693191U - Distributed all-optical pressure sensor detection system applied to transformer substation - Google Patents
Distributed all-optical pressure sensor detection system applied to transformer substation Download PDFInfo
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- CN202693191U CN202693191U CN 201220231292 CN201220231292U CN202693191U CN 202693191 U CN202693191 U CN 202693191U CN 201220231292 CN201220231292 CN 201220231292 CN 201220231292 U CN201220231292 U CN 201220231292U CN 202693191 U CN202693191 U CN 202693191U
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- bragg grating
- fiber bragg
- multicoupler
- grating fbg
- coupler
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Abstract
The utility model provides a distributed all-optical pressure sensor detection system applied to a transformer substation, which comprises an optical switch and a multi-path coupler, wherein an output end of the optical switch is connected with a coupler I; the output end of the multi-path coupler is connected with a coupler II; the coupler I and the coupler II are combined together and are externally connected with sensors; the optical switch is connected with a broadband light source; and a computer is connected to input ends of the optical switch and the multi-path coupler; in the designed project system, the pressure of each sensor can be reported in time by the computer because of a plurality of the arranged sensors. According to the pressure change of each sensor, such as gas leakage and over high pressure situations, alarms can be issued in time, specific locations can be reported, and information such as detecting the gas leakage situation is displayed on the computer. Since the device is an all-optical system, the distributed all-optical pressure sensor detection system is easy to obtain precise results under the condition of high voltage and high magnetic field, and the prompt and efficient response can provide precious time for resolving faults.
Description
Technical field
The utility model relates to a kind of strong sensor detecting system of distributed full optical pressure for transformer station.
Background technology
GIS (gas-insulated metal enclosed switchgear) be with the main objects of all except transformer such as isolating switch, disconnector, grounding switch, bus, mutual inductor, lightning arrester pack into the sealing metal shell in, inside is filled with SF
6Gas is as insulation and arc-extinguishing medium, have floor area few, be not affected by the external environment, safe and reliable to operation, safeguard simple and the advantage such as the time between overhauls(TBO) is long, be widely used in all kinds of transformer stations.
GIS is the high voltage electric equipment that operational reliability is high, maintenance workload is few, the time between overhauls(TBO) is long, and its failure rate only has 20%～40% of conventional equipment, but GIS also has its intrinsic shortcoming, because SF
6The factor affecting such as the existence of the leakage of gas, the infiltration of outside moisture, conductive impurity, the Ageing of Insulators all may cause GIS internal flashover fault.The all-sealed structure of GIS makes relatively difficulty of the location of fault and maintenance, and service work is numerous and diverse, after the accident the average interruption maintenance time longer than conventional equipment, its power failure range is large, often relates to non-fault element.
For guaranteeing the leakproofness of GIS, prevent SF
6Gas density is reduced to unsafe value, monitor the casing internal pressure of GIS.With regard to pressure measurement, present various sensors (piezoelectric type, strain resistance type, condenser type, inductance type) have common characteristics: all adopt the variation of electric signal to measure.But electric equipment such as GIS, isolating switch etc. be often with very high current potential, even lie prostrate up to hundreds of thousands.Under this noble potential, strong magnetic field circumstance, the serious interference that method for electrically is measured, not only the work difficulty of measurement mechanism own is larger, and the transmission of signal, detection and processing also have very large problem.For this reason, utilize the sensor of Fiber Bragg Grating FBG (FBG) design one full light.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of by detecting the variation of each sensor pressure, in time give the alarm, and can report out particular location, reach the information such as gas leakage situation, the result who obtains is accurate, it is quick to be swift in response, and in time solves the strong sensor detecting system of distributed full optical pressure that is used for transformer station that fault provides the time of preciousness.
The utility model is realized by the following technical solutions: comprise photoswitch and multicoupler, described photoswitch output terminal is connected with coupling mechanism one, described multicoupler output terminal is connected with coupling mechanism two, sensor is combined and be externally connected to described coupling mechanism one and coupling mechanism two, described photoswitch is connected with a wide spectrum light source, be connected with computing machine on described photoswitch and the multicoupler input end, described photoswitch and computing machine junction are provided with PC control signal system, and described multicoupler and computing machine junction are in series with photo-detector and discharge circuit.
Further, described sensor internal is provided with housing, upper Fiber Bragg Grating FBG (FBG), lower Fiber Bragg Grating FBG (FBG), the overarm arm, O-ring seal, metallic cylinder and fulcrum, described upper Fiber Bragg Grating FBG (FBG) and lower Fiber Bragg Grating FBG (FBG) are arranged on the fulcrum top and bottom, described upper Fiber Bragg Grating FBG (FBG), lower Fiber Bragg Grating FBG (FBG) and fulcrum are arranged in the overarm arm, described overarm arm is arranged in the metallic cylinder, described metallic cylinder is arranged in the housing, described O-ring seal is arranged on an end of metallic cylinder, also is provided with an air intake opening on the described housing.
Further, described photoswitch is connected to connect to organize coupling mechanisms and a plurality of sensors more with multicoupler.
Further, described metallic cylinder is free elastic body.
Further, described computer installation has generalized information system.
The beneficial effect that the utility model is used for the strong sensor detecting system of distributed full optical pressure of transformer station is: the design's project system, because a plurality of sensors that are provided with, by calculating the pressure of punctual each sensor of report of function.By detecting the variation of each sensor pressure, if any gas leakage or the excessive situation of pressure, can in time give the alarm, and can report out particular location, the information such as detection gas leakage situation show on computers.Because this device is full photosystem, is easy at this kind high voltage, in the situation of highfield, obtains accurate result, it is quick to be swift in response, and provides the valuable time in time solving fault.
Description of drawings
Fig. 1 is the sensing principle figure of Fiber Bragg Grating FBG of the present utility model;
Fig. 2 is systematic schematic diagram of the present utility model.
Embodiment
In the present embodiment, shown in seeing figures.1.and.2, the utility model is used for the strong sensor detecting system of distributed full optical pressure of transformer station, comprise photoswitch 1 and multicoupler 2, described photoswitch 1 output terminal is connected with coupling mechanism 1, described multicoupler 2 output terminals are connected with coupling mechanism 24, sensor 5 is combined and be externally connected to described coupling mechanism 1 and coupling mechanism 24, described photoswitch 1 is connected with a wide spectrum light source 6, be connected with computing machine 7 on described photoswitch 1 and multicoupler 2 input ends, described photoswitch 1 and computing machine 7 junctions are provided with PC control signal system 8, and described multicoupler 2 and computing machine 7 junctions are in series with photo-detector 9 and discharge circuit 10.
Described sensor 5 inside are provided with housing 11, upper Fiber Bragg Grating FBG (FBG) 12, lower Fiber Bragg Grating FBG (FBG) 13, overarm arm 14, O-ring seal 15, metallic cylinder 16 and fulcrum 17, described upper Fiber Bragg Grating FBG (FBG) 12 and lower Fiber Bragg Grating FBG (FBG) 13 are arranged on fulcrum 17 top and bottom, described upper Fiber Bragg Grating FBG (FBG) 12, lower Fiber Bragg Grating FBG (FBG) 13 and fulcrum 17 are arranged in the overarm arm 14, described overarm arm 14 is arranged in the metallic cylinder 16, described metallic cylinder 16 is arranged in the housing 11, described O-ring seal 15 is arranged on an end of metallic cylinder 16, also is provided with an air intake opening 19 on the described housing 11;
Described photoswitch 1 is connected with multicoupler can connect many group coupling mechanisms and a plurality of sensor 5, in the present embodiment, and two groups of coupling mechanisms and two sensors 5;
Described metallic cylinder 16 is free elastic body;
Described computing machine 7 is provided with generalized information system 18.
Because Fiber Bragg Grating FBG (FBG) is a kind of wavelength selectivity reverberator, utilize the effect of grating pair temperature and strain, by some auxiliary Fiber in Smart Structures, can also realize the detection of other many kinds of parameters, the reflection wavelength of fiber grating is subject to measured modulation and produces skew, demodulates wavelength variations and just can obtain measured.Light that wide spectrum light source sends can obtain reflected light through Fiber Bragg Grating FBG, when residing environment temperature changes or during suffered stress changes, the catoptrical centre wavelength that obtains can be drifted about.
Wide spectrum light source is " lower Fiber Bragg Grating FBG (FBG) " in coupling mechanism one to Fig. 2 first, its reflected light passes into " upper Fiber Bragg Grating FBG (FBG) grating " among Fig. 2 through coupling mechanism two again behind coupling mechanism one, upper " Fiber Bragg Grating FBG (FBG) " reflected light leads to multicoupler through coupling mechanism two, through photo-detector and amplifying circuit.Processed and demonstration by computer acquisition.
Because the effect of pressure so that free elastic body radially deform, cause the change of elastic body internal cantilever beam free end amount of deflection, thereby so that two fiber gratings are subject to respectively the effect of stretching strain and compressive strain, and the equal and opposite in direction of stretching strain (normal strain) and compressive strain (negative strain), opposite in sign.Because structure shown in Figure 2 is so that under the effect of pressure, the reflection wavelength of the grating that two parameters are identical has identical amount of movement to long and short wavelength direction respectively.Both differences and can be expressed as by the relation between measuring pressure:
Wherein L and h are respectively length and the thickness of semi-girder, and D is free elastomeric internal diameter, and Pe is the strain optical coefficient of optical fiber,
Bragg reflection wavelength for grating.
The reflectance spectrum of two gratings all available Gaussian function represents:
Wherein
With
Respectively the bragg wavelength of two gratings,
With
Be the three dB bandwidth of two optical grating reflections spectrum,
With
Be the reflectivity of grating,
With
Being constant. the light signal that photodetector receives should be these two convolution that grating transmits, and namely exists
Wherein,
Light attenuation coefficient for system. (8) formula substitution can be got
Wherein,
Be integration constant. will be caused the separated from one another of two optical grating reflection spectrum by the variation of measuring pressure, the light intensity that causes photodetector to receive separated from one another of spectrum changes.
In this system, the Fiber Bragg Grating FBG of selecting (FBG) centre wavelength under normal conditions requires consistent.When pressure was identical inside and outside elastic body like this, the luminous power that photodetector receives was maximum.When the pressure in the external world diminished, the overarm arm rose, upper Fiber Bragg Grating FBG (FBG) compression, and lower Fiber Bragg Grating FBG (FBG) stretches; When outside pressure became large, the overarm arm pressed down by fulcrum, and upper Fiber Bragg Grating FBG (FBG) stretches, lower Fiber Bragg Grating FBG (FBG) compression, thus corresponding the variation occurs in the luminous power that photodetector is received, and measures outside pressure.
When environment temperature changed, the reflection peak of two Fiber Bragg Grating FBGs (FBG) moved to equidirectional simultaneously, and the luminous power that photodetector receives is unaffected, had effectively eliminated the impact of environment temperature on measuring.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (5)
1. strong sensor detecting system of distributed full optical pressure that is used for transformer station, it is characterized in that: comprise photoswitch and multicoupler, described photoswitch output terminal is connected with coupling mechanism one, described multicoupler output terminal is connected with coupling mechanism two, sensor is combined and be externally connected to described coupling mechanism one and coupling mechanism two, described photoswitch is connected with a wide spectrum light source, be connected with computing machine on described photoswitch and the multicoupler input end, described photoswitch and computing machine junction are provided with PC control signal system, and described multicoupler and computing machine junction are in series with photo-detector and discharge circuit.
2. the strong sensor detecting system of distributed full optical pressure for transformer station according to claim 1, it is characterized in that: described sensor internal is provided with housing, upper Fiber Bragg Grating FBG, lower Fiber Bragg Grating FBG, the overarm arm, O-ring seal, metallic cylinder and fulcrum, described upper Fiber Bragg Grating FBG and lower Fiber Bragg Grating FBG are arranged on the fulcrum top and bottom, described upper Fiber Bragg Grating FBG, lower Fiber Bragg Grating FBG and fulcrum are arranged in the overarm arm, described overarm arm is arranged in the metallic cylinder, described metallic cylinder is arranged in the housing, described O-ring seal is arranged on an end of metallic cylinder, also is provided with an air intake opening on the described housing.
3. the strong sensor detecting system of distributed full optical pressure for transformer station according to claim 1 is characterized in that: described photoswitch is connected with multicoupler and is connected many group coupling mechanisms and a plurality of sensors.
4. the strong sensor detecting system of distributed full optical pressure for transformer station according to claim 2, it is characterized in that: described metallic cylinder is free elastic body.
5. the strong sensor detecting system of distributed full optical pressure for transformer station according to claim 1, it is characterized in that: described computer installation has generalized information system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231292 CN202693191U (en) | 2012-05-22 | 2012-05-22 | Distributed all-optical pressure sensor detection system applied to transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220231292 CN202693191U (en) | 2012-05-22 | 2012-05-22 | Distributed all-optical pressure sensor detection system applied to transformer substation |
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| CN 201220231292 Expired - Fee Related CN202693191U (en) | 2012-05-22 | 2012-05-22 | Distributed all-optical pressure sensor detection system applied to transformer substation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675943A (en) * | 2013-11-27 | 2014-03-26 | 国家电网公司 | Substation personnel location monitor |
| CN107621328A (en) * | 2017-09-07 | 2018-01-23 | 南京溯极源电子科技有限公司 | A kind of atmospheric pressure measurement apparatus and method |
-
2012
- 2012-05-22 CN CN 201220231292 patent/CN202693191U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675943A (en) * | 2013-11-27 | 2014-03-26 | 国家电网公司 | Substation personnel location monitor |
| CN107621328A (en) * | 2017-09-07 | 2018-01-23 | 南京溯极源电子科技有限公司 | A kind of atmospheric pressure measurement apparatus and method |
| CN107621328B (en) * | 2017-09-07 | 2024-05-28 | 南京溯极源电子科技有限公司 | Atmospheric pressure measuring device and method |
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| Date | Code | Title | Description |
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| 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: 20130123 Termination date: 20130522 |