CN104089652B - A kind of fiber grating transformer online monitoring system and monitoring method thereof - Google Patents
A kind of fiber grating transformer online monitoring system and monitoring method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of fiber grating transformer online monitoring system and monitoring method thereof, the intelligent object of monitoring system is connected with terminal demonstration computer, photoswitch movement device and at least one monitoring means respectively；Each monitoring means includes fiber Bragg grating (FBG) demodulator and at least one sensing unit connected by optical fiber；Each sensing unit includes being in turn connected to form the optical fiber grating sensing string of closed-loop structure, 1 × 1 photoswitch and 1 × 2 fiber optic splitter.Monitoring method includes that the duty of normal condition and optical fiber grating sensing string occur duty when breaking fine, this system has sensor automatic addressing, automaticity high after high reliability, high scalability, disconnected fibre, is simultaneously achieved the function remotely monitoring optical fiber grating sensing string-like state.
Description
Technical field
The present invention relates to a kind of power transformer on-line monitoring technique, in particular to one fiber grating transformer online monitoring system
System and monitoring method thereof.
Background technology
The height of the mechanical vibration of the power transformer of power system, winding temperature, iron core temperature and oil temperature etc. is insulating properties and old
The directly reflection of rate, directly affects the safe operation of power system.Under normal circumstances, the benchmark of hot(test)-spot temperature is 98 DEG C,
Often rise 6 DEG C of ageing rates in fiducial temperature to double, often decline 6 DEG C of life longer one and characterize again between ageing rate and temperature
Relation.If hot(test)-spot temperature exceedes permissible value, not only affect the service life of transformator, the safety of transformator also can be caused to transport
Row related accidents.Therefore, by the temperature of inside transformer being carried out Real Time Monitoring early warning and taking effective measures, can
With the effective generation reducing corresponding accident.To power transformer internal temperature and the monitoring of other physical quantitys, healthy to transformator
The monitoring of state, it is possible to effectively extend transformator service life, be the important means ensureing power network safety operation.
Transformer monitoring is mainly monitored winding temperature, and traditional monitoring method is electricity consumption class sensing and infrared survey.Based on electricity class
Sensor such as thermocouple, resistance thermometer etc., this kind of sensor is easily subject to electromagnetic interference, and measurement accuracy declines.Noncontact
Infrared measurement of temperature, although sensitivity and accuracy are the highest, but are easily disturbed by background environment and electromagnetic field, and need
Human at periodic intervals's Site Detection, it is impossible to reach the most real-time on-line monitoring requirement.And infrared radiation thermometer can only measuring transformer table
The temperature in face, it is impossible to accurately reflect the distribution situation in inside transformer temperature field is bigger with inside transformer true temperature error.
The optical fiber sensing system monitoring method being used in recent years in power system, has Fibre Optical Sensor itself and has explosion-proof, exhausted
Edge, electromagnetism interference, light weight, volume be little, corrosion-resistant, waterproof, collection sensing be transmitted in one, long-time stability are good,
Sensing accuracy and sensitivity are high, it is easy to multiple spot distribution measuring, and can multiplex by single line, constitute sensing network and array,
It is easy to wavelength-division and time-division multiplexing and distributed sensing, it is easy to accomplish the advantages such as remote on-line monitoring.Wherein optical fiber grating sensing is main
For point type sensor monitoring, and optical fiber grating sensing monitoring range is wide, can monitor temperature, pressure pressure, ess-strain,
Acceleration, inclination angle, vibration etc..
And the inevitable defect of Fibre Optical Sensor is, sensor fibre is the glass fiber as hairline thickness, the situation of non-good protection
Under be susceptible to disconnected fibre.Further, applied environment severe in transformator and the operating mode of complexity, proposing to optical fiber sensing system can
By the requirement that property is high.Additionally, all kinds of sensing and monitoring systems being distributed in electrical network are usually separate, it is impossible to integrated,
Such as fluorescence optical fiber sensing and monitoring system, distributed optical fiber sensing monitoring system, electromagnetism class sensing and monitoring system etc., these are independent
System cannot realize unified monitoring management, carries out maintenance to electric power network technique personnel and brings great inconvenience.
The applicant observes for a long time, study and find mainly to concentrate on sensing prison for the research of transformator fiber grating sensing system
Survey unit, prior art lacks fiber grating sensing system and the adaptability of the communication system of power grids, the reliability of sensing network, sensing
The autgmentability amalgamation of monitoring." the inside transformer temperature detection based on fiber grating that CN101949744B patent proposes
System " disclose fiber grating and be applied to the basic model of transformer monitoring.CN 101917230B, entitled " jumbo
Self-healing optical fiber sensor network network " patent disclose the pervasive sensing network of theoretical property, not on present in prior art
State technical problem and solution is provided.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of fiber grating transformer online monitoring system and monitoring thereof
Method, the concrete application that the present invention monitors towards intelligent transformer, this system has good with other sensing and monitoring system in electrical network
Amalgamation, and have higher reliability and autgmentability compared with other sensor-based system.
It is an object of the invention to use following technical proposals to realize:
The present invention provides a kind of fiber grating transformer online monitoring system, described monitoring system include monitoring means, intelligent object,
Photoswitch movement device and terminal demonstration computer；It thes improvement is that, described intelligent object respectively with terminal demonstration computer, light
Switch motion device and monitoring means connect；Each monitoring means includes fiber Bragg grating (FBG) demodulator and the sensing list connected by optical fiber
Unit；Sensing unit includes being in turn connected to form the optical fiber grating sensing string of closed-loop structure, 1 × 1 photoswitch and 1 × 2 fiber optic splitter.
Further, the two ends of described optical fiber grating sensing string respectively with the branch of one end of fiber optic splitter and photoswitch
One end connects；The other end of photoswitch is connected with another branch of one end of fiber optic splitter；Fiber optic splitter the 3rd end and institute
State fiber Bragg grating (FBG) demodulator to connect；The signal of described fiber Bragg grating (FBG) demodulator flows to intelligent object and processes；Photoswitch action
The two ends of device are connected with intelligent object respectively and photoswitch constitutes link gear and connects；Data are flowed to end by described intelligent object
End display computer, if there being order, is directly assigned to photoswitch movement device, and described photoswitch movement device closes after taking orders
Photoswitch.
Further, described optical fiber grating sensing string is made up of the fiber-optic grating sensor connected from beginning to end, described optical fiber grating sensing
Device is used for monitoring fiber grating transformator top-oil temperature, bottom oil temperature, iron core temperature, bus bar temperature, winding temperature and vibration；
Described fiber-optic grating sensor is the fiber-optic grating sensor of double-width grinding output.
Further, the fiber-optic grating sensor of described double-width grinding output includes stress strain gauge, pressure pressure transducer
And acceleration transducer.
Further, the splitting ratio of 1 × 2 described fiber optic splitter is 50:50.
Further, described monitoring means is optical fiber grating sensing monitoring means, fluorescence optical fiber sensing technology monitoring means, distribution
Formula optical fiber sensing technology monitoring means or electromagnetism class sensing technology monitoring means.
Further, described intelligent object includes communicating successively IEC61850 server, data processor, IEC61850
Model library, protocol converter, agreement determinant and open interface；Described data processor is shown with state respectively by watch-dog
Device and photoswitch movement device connect；Mapping ruler editing machine is connected with protocol converter and agreement determinant respectively by protocol library；
Described agreement determinant is connected with monitoring means by open interface；Configuration tool carries out data transmission with IEC61850 model library；
Open interface is for connecting the monitoring main frame of different vendor, different communication interface；
Agreement determinant is for identifying the communication protocol of information of uploading；
Protocol converter is for being converted into IEC 61850 data by the data of the legacy protocol of reception；
Protocol library is protocol sample storehouse；
Mapping ruler editing machine is for setting up the mapping ruler between the legacy protocol of conventional sense monitoring device and IEC61850；
IEC 61850 model library provides fiber grating transformator or substation equipment IEC 61850 model instance；
Configuration tool is to the increase of IEC 61850 model library, amendment or the instrument of case-deleted models；
Data processor carries out data analysis and process for monitoring means is uploaded information；
Watch-dog is responsible for issuing an order to photoswitch movement device and providing data to status displays；
Status displays is for showing state and the exception monitoring dot information of each Fibre Optical Sensor string；
IEC 61850 server is responsible for carrying out real-time data communication based on IEC 61850.
Further, described intelligent object has a following function: 1. data processing and inversion；2. disconnected fibre judges and locating alarming,
And the health status of the corresponding disconnected fine sensing unit of display in real time, including the fine and partial destruction that normally, once breaks, for fiber grating
Maintenance and the maintenance of sensing unit is carried out during transformer overhaul；3. directly corresponding light switch is issued an order during disconnected fibre, drive light to open
Close movement device Guan Bi photoswitch；4. communication protocol judges and identifies function, IEC61850 communication protocol translation function；5. data
Transmission；6. the extension open interface for sensing technology monitoring means is had.
Further, described fiber Bragg grating (FBG) demodulator is static (FBG) demodulator based on F-P principle, if monitoring Dynamic Signal, uses
Dynamic demodulation instrument based on M-Z principle.
The present invention also provides for the monitoring method of a kind of fiber grating transformer online monitoring system, and it thes improvement is that, described prison
Survey method includes the monitoring process under system health of monitoring and the work process in the case of disconnected fibre.
Further, the monitoring process under described monitoring system health includes:
<1>photoswitch is off；
<2>wideband light source signal is transferred to optical fiber grating sensing string through fiber optic splitter by fiber Bragg grating (FBG) demodulator；
<3>signals such as the temperature of fiber grating transformator relevant position are passed through fiber beam splitting by the fiber-optic grating sensor of sensing unit
Device returns fiber Bragg grating (FBG) demodulator and carries out preliminary treatment；
<4>fiber-optic grating sensor information conveyance is analyzed by fiber Bragg grating (FBG) demodulator to intelligent object, it is judged that identify fiber grating
(FBG) demodulator communication protocol；
<5>if not IEC 61850 communication standard, then information is changed according to IEC 61850 communication protocol, and be transported to
Communication system of power grids optical cable；
<6>fiber grating transformer state information is illustrated on the terminal demonstration computer of main monitoring the most at last.
Further, the monitoring process that described monitoring system is broken in the case of fibre includes:
A, when there is once disconnected fine situation in the optical fiber grating sensing string of sensing unit, optical fiber grating sensing string returns to optical fiber light
The sensor information of grid (FBG) demodulator and intelligent object has disappearance, once the N number of fiber-optic grating sensor information after disconnected fine position
Lose, intelligent object analytical data situation, and in the case of the fibre that once breaks, make disconnected fine judgement, and optical switch of issuing an order
Movement device；Wherein, N >=1；
B, photoswitch movement device take orders and start, and close photoswitch, and the fibre that once breaks causes N number of optical fiber of loss of function
Grating sensor accesses in same the same passage of fiber Bragg grating (FBG) demodulator again, and fiber Bragg grating (FBG) demodulator automatic seeking finds out optical fiber light
Gate sensor, it is simple to fiber-optic grating sensor addresses；Wherein, N >=1；
C, intelligent object automatic Memory also show whether each sensing unit occurred disconnected fine health status；
If D occurs repeatedly disconnected fibre, mid portion fiber-optic grating sensor cannot recover automatically, two ends fiber-optic grating sensor energy
Enough normal work.
Compared with the prior art, the present invention reaches to provide the benefit that:
1, for the reliability of optical fiber sensing system of Transformer's Condition Monitoring and various optical fiber sensing monitoring and electromagnetic sensing monitoring system
The poor problem of amalgamation of system, it is proposed that a kind of reliability is higher and extensibility more preferable optical fiber sensing monitoring system, is used for
The health status of monitoring transformator, or even the health status of other converting equipments.
2, the high reliability of the fiber grating transformer online monitoring system of highly reliable easy expanded function is for FBG monitoring list
Unit.Its high reliability is mainly reflected in: 1. when certain sensing unit occurs once disconnected fibre, intelligent object can be issued an order and be closed
Close photoswitch, thus lost contact fiber-optic grating sensor accesses the same channels operation of same (FBG) demodulator again, it is possible to realize sensing
Device automatic addressing.2. when certain sensing unit occurs repeatedly disconnected fine, intelligent object is issued an order Guan Bi photoswitch so that sensing
The sensor that string two ends still connect works on, mid portion sensor loss of function.Two kinds of disconnected fine working conditions are as shown in Figure 5.
3. breaking after fibre, intelligent object can warn disconnected fine situation and position, is monitored the maintenance of system during convenient transformer overhaul from now on.
3, the expansibility of the fiber grating transformer online monitoring system of highly reliable easy expanded function can be mainly in systemic-function and
System scale two aspect realizes: 1) systemic-function aspect, and 1. the sensor at sensing unit can be the light of various physical quantity
Fiber grating sensor；2., in the case of sensing unit number of sensors unsaturation, optical fibre grating acceleration, pressure pressure can be increased
The sensor of the different physical quantities such as strong is for transformator or even transformer station's health monitoring；3. the strongest owing to have employed compatibility
Intelligent object, thus achieve the amalgamation of the monitoring means of different sensing technology well, it is simple to use non-Fibre Optical Sensor to supervise
Survey (such as electromagnetism class etc.) unit and make up the function that optical fiber sensing monitoring unit cannot realize.2) system scale aspect, have employed tool
There is the intelligent object of open interface, can arbitrarily increase some a whole set of monitoring means, thus further increase transformator or power transformation
Stand monitoring upgrading ability.
Specific as follows:
(1) have that explosion-proof, the insulation of Fibre Optical Sensor, electromagnetism interference, light weight, volume be little, corrosion-resistant, waterproof, collection passes
Sense be transmitted in one, long-time stability are good, sensing accuracy and sensitivity high, it is easy to multiple spot distribution measuring, and can single line
Multiplexing, constitutes sensing network and array, it is simple to wavelength-division and time-division multiplexing and distributed sensing, it is easy to accomplish remote online prison
Survey.
(2) after described sensor-based system has disconnected fibre, auto restore facility and sensing string health status alarm function, enhance sensing prison
The reliability of examining system.
(3) intelligent object in described sensor-based system leaves some open interfaces, can extend various optical fiber sensing monitoring unit with
And non-optical fiber sensing monitoring unit.
(4) described sensor-based system can the communication protocol of automatic decision identification fiber Bragg grating (FBG) demodulator, and carry out IEC 61850 and lead to
The function of letter stipulations conversion.
(5) each sensing unit is monitored and controls by this system, improves automaticity and the sensing unit state of system
Cognition degree, it is simple to lost contact sensor automatic addressing.
Accompanying drawing explanation
Fig. 1 is the fiber grating transformer online monitoring system construction drawing that the present invention provides；Wherein: 1-terminal demonstration computer；2-
Intelligent object；3-fiber Bragg grating (FBG) demodulator；4-1 × 2 fiber optic splitter；5-1 × 1 photoswitch；6-fiber-optic grating sensor；7-
Photoswitch movement device；8-optical fiber grating sensing string；9-sensing unit；10-monitoring means；
Fig. 2 is the single monitoring means schematic diagram of the monitoring system that the present invention provides；
Fig. 3 is the intelligent object structural representation that the present invention provides；
Fig. 4 is the work-based logic schematic diagram of the fiber grating transformer online monitoring system that the present invention provides；
Fig. 5 is the disconnected fine situation logical schematic of fiber grating transformer online monitoring system that the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The fiber grating transformer online monitoring system construction drawing that the present invention provides is as it is shown in figure 1, this system includes terminal demonstration electricity
Brain 1, intelligent object 2, photoswitch movement device 7 and several monitoring means 10, each monitoring means 10 includes fiber grating
(FBG) demodulator 3 and several sensing units 9, each sensing unit 9 includes optical fiber grating sensing string 8,1 × 1 photoswitch 5 and 1
× 2 fiber optic splitters 4, optical fiber grating sensing string 8 is for transformator top-oil temperature, bottom oil temperature, iron core temperature, bus bar
It is the most a string that fiber-optic grating sensor 6 head and the tail of the monitoring such as temperature, winding temperature and vibration are cascaded.Fiber grating passes
Sensor is the fiber-optic grating sensor of double-width grinding output.The fiber-optic grating sensor of double-width grinding output includes that ess-strain senses
Device, pressure pressure transducer and acceleration transducer.The splitting ratio of 1 × 2 fiber optic splitter 4 is 50:50.Fiber Bragg grating (FBG) demodulator
It is static (FBG) demodulator based on F-P principle, if monitoring Dynamic Signal, uses dynamic demodulation instrument based on M-Z principle.
The single monitoring means structure of this system is as in figure 2 it is shown, one end a of optical fiber grating sensing string 8 and fiber optic splitter 4
One branch c of one end connects；The other end b of optical fiber grating sensing string 8 is connected with one end e of photoswitch 5；Photoswitch 5
Other end f be connected with another branch d of one end of fiber optic splitter 4；Fiber optic splitter other end g and fiber grating solution
Instrument 3 is adjusted to connect；The signal of fiber Bragg grating (FBG) demodulator 3 flows to intelligent object 2 and processes；Photoswitch movement device 7 one end
With intelligent object 2 connects, the other end constitutes link gear with photoswitch 5；Data are flowed to terminal demonstration electricity by intelligent object 2
Brain 1, if there being order to be directly assigned to photoswitch movement device 7, photoswitch movement device 7 can close photoswitch 5 after taking orders.
High scalability refers to, monitoring means can be the sensing technology of all kinds, as fluorescence optical fiber monitoring sensing technology unit,
Distributed Optical Fiber Sensing Techniques monitoring means, electromagnetism class sensing technology monitoring means etc..
High reliability is aimed at optical fiber grating sensing monitoring means.In the case of disconnected fibre, described photoswitch closes, and loses letter
Number fiber-optic grating sensor again access in same the same passage of fiber Bragg grating (FBG) demodulator, lost contact optical fiber light need not be re-entered
Gate sensor information, fiber Bragg grating (FBG) demodulator automatic seeking is found out fiber-optic grating sensor, is i.e. easy to fiber-optic grating sensor addressing.
In this system, the structure of intelligent object is as it is shown on figure 3, the structure of intelligent object includes: open interface, agreement determinant,
Protocol converter, protocol library, mapping ruler editing machine, IEC 61850 model library, configuration tool, data processor, watch-dog,
Status displays, monitoring means movement device, IEC 61850 server.Described data processor by watch-dog respectively with state
Display and photoswitch movement device connect；Mapping ruler editing machine by protocol library respectively with protocol converter and agreement determinant
Connect；Described agreement determinant is connected with monitoring means by open interface；Configuration tool and IEC61850 model library carry out data
Transmission；
Open interface is for connecting the monitoring main frame of different vendor, different communication interface；Agreement determinant uploads information for identification
Communication protocol；Protocol converter is for being converted into IEC 61850 data by the data of the legacy protocol of reception；Protocol library is association
View Sample Storehouse；Mapping ruler editing machine is for setting up the mapping between the legacy protocol of conventional sense monitoring device and IEC61850
Rule；IEC 61850 model library provides transformator or substation equipment IEC 61850 model instance；Configuration tool is to IEC
61850 model libraries increase, revise or the instrument of case-deleted models；The effect of data processor is monitoring means to be uploaded information carry out
Data analysis and process；Watch-dog is responsible for issuing an order to monitoring means movement device (i.e. photoswitch movement device in system)
Data are provided with to status displays；Status displays is responsible for showing state and the exception monitoring dot information of each Fibre Optical Sensor string；Prison
Survey the photoswitch movement device in unit movement device i.e. system, be responsible for monitoring means and control (i.e. photoswitch action)；IEC 61850
Server is responsible for carrying out real-time data communication based on IEC 61850.
Intelligent object has a following function: 1. data processing and inversion；2. disconnected fibre judges and locating alarming, and display is corresponding in real time
The health status (normally, once break fine, partial destruction) of disconnected fine sensing unit, it is simple to carry out sensing from now on during transformer overhaul single
The maintenance of unit and maintenance；3. directly corresponding light switch is issued an order during disconnected fibre, driven optical switch movement device Guan Bi photoswitch；
4. communication protocol judges and identifies function, IEC 61850 communication protocol translation function；5. data transmission；6. have multiple opening to connect
Mouthful, for all kinds of sensor monitoring unit extensions etc..
The present invention also provides for the monitoring method of a kind of fiber grating transformer online monitoring system, and monitoring method is just including monitoring system
Monitoring process in the case of Chang and the work process in the case of disconnected fibre.
Normal condition is as shown in Figure 4: the high reliability request sensor of fiber grating transformer online monitoring system is double-width grinding
The fiber-optic grating sensor 6 of output.Under normal circumstances, photoswitch 4 is off.Fiber Bragg grating (FBG) demodulator 3 is by broadband
Light signal is transferred to one end not connecing photoswitch of optical fiber grating sensing string 8 through fiber optic splitter 4, sensing unit 9 each
The signals such as the temperature of transformator relevant position are returned fiber Bragg grating (FBG) demodulator 3 by fiber optic splitter 4 by fiber-optic grating sensor 6
Carrying out preliminary treatment, sensor information is transported to intelligent object 2 and is analyzed by fiber Bragg grating (FBG) demodulator 3, it is judged that identify optical fiber
Grating demodulation instrument 3 communication protocol, if not IEC 61850 communication standard, then enters information according to IEC 61850 communication protocol
Row conversion, and it is transported to communication system of power grids optical cable, the most on-the-spot transformer state information is illustrated in main monitor terminal display computer 1
On.
Disconnected fine situation as it is shown in figure 5, when there is once to break fine situation in the optical fiber grating sensing string 8 of sensing unit 9, optical fiber light
The sensor information that grid sensing string 8 returns to fiber Bragg grating (FBG) demodulator 3 and intelligent object 2 just has disappearance, once disconnected fine position
Several fiber-optic grating sensor 6 information dropouts afterwards, intelligent object 2 meeting intellectual analysis data cases, and in this situation
Under make disconnected fine judgement, and optical switch movement device 7 of issuing an order, photoswitch movement device 7 takes orders and starts,
Guan Bi photoswitch, the fibre that the most once breaks causes N number of (N >=1) fiber-optic grating sensor of loss of function again to access same light
In the fine same passage of grating demodulation instrument 3, need not re-enter lost contact sensor information, fiber Bragg grating (FBG) demodulator 3 can Automatic-searching
Go out sensor, that is be easy to sensor addressing.Intelligent object 2 meeting automatic Memory also shows whether each sensing unit 9 occurred to break
Fine health status (as normally, once break fibre, partial destruction), carries out the maintenance of sensing unit during convenient transformer overhaul the most from now on；
If there is repeatedly disconnected fibre, mid portion sensor will be unable to automatically recover, and two end sensors can normally work.
In view of above-mentioned operation principle, based on intelligent object and the system of optical fiber grating sensing, it is achieved that sensing unit and monitoring means
The scalability of two-stage and the raising of fusion performance.It is embodied in:
(1) " photoswitch photoswitch driving means intelligent object " system structure of the present invention improves sensing unit
Reliability；" intelligent object " achieves the high expanded function of this system, and the fusion of communication system of power grids stipulations.The reliability of system is
It is directed to optical fiber grating sensing monitoring means；Autgmentability refers to, monitoring means can be the sensing technology of all kinds, as glimmering
Light fiber-optic monitoring unit, distributed optical fiber sensing unit, electromagnetism class sensor monitoring unit etc..
(2) based on fiber grating sensing technology, its sensing principle is according to formula λB=0.78 λBεa+6.67×10-6λBT,
I.e. fiber grating center reflection wavelength λBExtraneous temperature T being subject to it and strain stressaRelevant.Therefore, fiber grating can be used
In the sensor of making different kinds of parameters, thus realize transformer station's many reference amounts Study On Intelligent Monitoring Techniques.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, although reference
The present invention has been described in detail by above-described embodiment, and those of ordinary skill in the field still can concrete to the present invention
Embodiment is modified or equivalent, and these are equal without departing from any amendment or the equivalent of spirit and scope of the invention
Within the claims that application is awaited the reply.
Claims (2)
1. a fiber grating transformer online monitoring system, described monitoring system includes at least one monitoring means, intelligent object, photoswitch movement device and terminal demonstration computer；It is characterized in that, described intelligent object is connected with terminal demonstration computer, photoswitch movement device and at least one monitoring means respectively；Each monitoring means includes fiber Bragg grating (FBG) demodulator and at least one sensing unit connected by optical fiber；Each sensing unit includes being in turn connected to form the optical fiber grating sensing string of closed-loop structure, 1 × 1 photoswitch and 1 × 2 fiber optic splitter；
One end of described optical fiber grating sensing string is connected with a branch of one end of fiber optic splitter；The other end of optical fiber grating sensing string is connected with one end of photoswitch；The other end of photoswitch is connected with another branch of one end of fiber optic splitter；Fiber optic splitter the 3rd end is connected with described fiber Bragg grating (FBG) demodulator；The signal of described fiber Bragg grating (FBG) demodulator flows to intelligent object and processes；Photoswitch movement device one end is connected with intelligent object, and the other end constitutes link gear with photoswitch；Data are flowed to terminal demonstration computer by described intelligent object, if there being order, are directly assigned to photoswitch movement device, and described photoswitch movement device closes photoswitch after taking orders；
Described optical fiber grating sensing string is made up of the fiber-optic grating sensor connected from beginning to end, and described fiber-optic grating sensor is used for monitoring fiber grating transformator top-oil temperature, bottom oil temperature, iron core temperature, bus bar temperature, winding temperature and vibration；Described fiber-optic grating sensor is the fiber-optic grating sensor of double-width grinding output；
The fiber-optic grating sensor of described double-width grinding output includes stress strain gauge, pressure pressure transducer and acceleration transducer；
The splitting ratio of 1 × 2 described fiber optic splitter is 50:50；
Described monitoring means is optical fiber grating sensing monitoring means, fluorescence optical fiber sensing technology monitoring means, Distributed Optical Fiber Sensing Techniques monitoring means or electromagnetism class sensing technology monitoring means；
Described intelligent object includes IEC61850 server, data processor, IEC61850 model library, protocol converter, agreement determinant and the open interface communicated successively；Described data processor is connected with status displays and photoswitch movement device respectively by watch-dog；Mapping ruler editing machine is connected with protocol converter and agreement determinant respectively by protocol library；Described agreement determinant is connected with monitoring means by open interface；Configuration tool carries out data transmission with IEC61850 model library；
Open interface is for connecting the monitoring main frame of different vendor, different communication interface；
Agreement determinant is for identifying the communication protocol of information of uploading；
Protocol converter is for being converted into IEC 61850 data by the data of the legacy protocol of reception；
Protocol library is protocol sample storehouse；
Mapping ruler editing machine is for setting up the mapping ruler between the legacy protocol of conventional sense monitoring device and IEC61850；
IEC 61850 model library provides fiber grating transformator or substation equipment IEC 61850 model instance；
Configuration tool is to the increase of IEC 61850 model library, amendment or the instrument of case-deleted models；
Data processor carries out data analysis and process for monitoring means is uploaded information；
Watch-dog is responsible for issuing an order to photoswitch movement device and providing data to status displays；
Status displays is for showing state and the exception monitoring dot information of each Fibre Optical Sensor string；
IEC 61850 server is responsible for carrying out real-time data communication based on IEC 61850；
Described intelligent object has a following function: 1. data processing and inversion；2. disconnected fibre judgement and locating alarming, and the health status of the corresponding disconnected fine sensing unit of display in real time, including the fine and partial destruction that normally, once breaks, carry out maintenance and the maintenance of sensing unit when fiber grating transformer overhaul；3. directly corresponding light switch is issued an order during disconnected fibre, driven optical switch movement device Guan Bi photoswitch；4. communication protocol judges and identifies function, IEC61850 communication protocol translation function；5. data transmission；6. multiple open interface is had, for the extension of all kinds of sensing technology monitoring means；
Described fiber Bragg grating (FBG) demodulator is static (FBG) demodulator based on F-P principle, if monitoring Dynamic Signal, uses dynamic demodulation instrument based on M-Z principle.
2. the monitoring method of a fiber grating transformer online monitoring system as claimed in claim 1, it is characterised in that described monitoring method includes the monitoring process under system health of monitoring and the work process in the case of disconnected fibre；
Monitoring process under described monitoring system health includes:
<1>photoswitch is off；
<2>wideband light source signal is transferred to optical fiber grating sensing string through fiber optic splitter by fiber Bragg grating (FBG) demodulator；
<3>signals such as the temperature of fiber grating transformator relevant position are carried out preliminary treatment by fiber optic splitter return fiber Bragg grating (FBG) demodulator by the fiber-optic grating sensor of sensing unit；
<4>fiber-optic grating sensor information conveyance is analyzed by fiber Bragg grating (FBG) demodulator to intelligent object, it is judged that identify fiber Bragg grating (FBG) demodulator communication protocol；
<5>if not IEC 61850 communication standard, then information is changed according to IEC 61850 communication protocol, and be transported to communication system of power grids optical cable；
<6>fiber grating transformer state information is illustrated on the terminal demonstration computer of main monitoring the most at last；
The monitoring process that described monitoring system is broken in the case of fibre includes:
A, when there is once disconnected fine situation in the optical fiber grating sensing string of sensing unit, optical fiber grating sensing string returns to the sensor information of fiber Bragg grating (FBG) demodulator and intelligent object and has disappearance, the once N number of fiber-optic grating sensor information dropout after disconnected fine position, intelligent object analytical data situation, and in the case of the fibre that once breaks, make disconnected fine judgement, and optical switch movement device of issuing an order；Wherein, N >=1；
B, photoswitch movement device take orders and start, Guan Bi photoswitch, the fibre that once breaks causes N number of fiber-optic grating sensor of loss of function again to access in same the same passage of fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator automatic seeking finds out fiber-optic grating sensor, it is simple to fiber-optic grating sensor addresses；Wherein, N >=1；
C, intelligent object automatic Memory also show whether each sensing unit occurred disconnected fine health status；
If D occurs repeatedly disconnected fibre, mid portion fiber-optic grating sensor cannot recover automatically, and two ends fiber-optic grating sensor can normally work.
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| CN104296859A (en) * | 2014-10-15 | 2015-01-21 | 北京交大创新科技中心 | Monitoring device for vibration and temperature state of ultra-high voltage power transformer in operation |
| CN104949915B (en) * | 2015-05-04 | 2017-10-10 | 华北电力大学 | A kind of oil-filled transformer fault locator based on Fiber Bragg Grating |
| CN106500869A (en) * | 2016-11-22 | 2017-03-15 | 国家电网公司 | A kind of temperature of oil in transformer monitoring device based on fiber grating principle |
| CN108692746B (en) * | 2017-04-05 | 2022-07-12 | 中兴通讯股份有限公司 | Sensing monitoring terminal, sensing monitoring system and sensing monitoring method |
| CN111307257B (en) * | 2019-11-11 | 2022-07-01 | 北京全路通信信号研究设计院集团有限公司 | Method and system for measuring weight of hump sliding vehicle |
| CN113639844B (en) * | 2021-07-14 | 2024-05-03 | 安徽复盛信息科技有限公司 | Sewage treatment plant aeration equipment health condition monitoring method based on grating temperature measurement |
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