CN106706159A - Fiber grating transformer multi-parameter intelligent monitoring system based on multiagent technology - Google Patents
Fiber grating transformer multi-parameter intelligent monitoring system based on multiagent technology Download PDFInfo
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- G—PHYSICS
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
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Abstract
The invention discloses a fiber grating transformer multi-parameter intelligent monitoring system based on a multiagent technology. The system comprises a fiber perceiving layer used for performing data acquisition on an operation state of a power transformer, a data processing layer used for receiving the data acquired by the fiber perceiving layer and performing analysis processing on the data, a monitoring layer used for performing real-time online analysis and monitoring, a central cooperation main body used for receiving and coordinating a monitoring result, and a user interface layer used for displaying the operation state of the transformer. The fiber perceiving layer comprises a plurality of fiber sensing main bodies used for acquiring the operation state of the power transformer, and the fiber sensing main bodies are fiber grating sensor networks.
Description
Technical field：
The invention belongs to transformer monitoring technical field, and in particular to a kind of optical fiber grating sensing based on Multi agent technology
Device distribution transformer hot spot temperature of winding, load tap changer oil chamber temperature and transformer oil level intelligent monitor system.
Background technology：
Used as national the pillar energy and economic lifeline, its safe and stable operation is not only related to the economic hair of country to electric power
Exhibition, and maintain national security.In power system, power transformer is energy conversion, the core of transmission in power network, is state
The economic all trades and professions of the people and the only way which must be passed in huge numbers of families' energy source.If a large-scale power transformer is in system operation
Break down, then may cause large-area power-cuts, its turn(a)round typically wants more than half a year, causes huge economic loss.Simultaneously
With the starting construction of extra-high voltage project, the requirement to transformer functional reliability is more and more high.And in the fortune of power transformer
In row, the monitoring and control to its temperature and oil level is the basic and key for safeguarding power transformer safe operation.Transformer
Life-span depends on insulation life, and hot spot temperature of winding when to influence the main factor of insulation life be transformer station high-voltage side bus, if
The temperature of winding hottest point is too low, then the ability of transformer is not just fully used, and reduces economic benefit.Hot(test)-spot temperature
If it exceeds allowable value, can not only influence transformer service life, transformer safety operation will also be threatened.Meanwhile,
The change of oil temperature directly affects the volume of transformer oil in transformer, rises or falls oil level.When oil level is too high, change can be made
Pressure inside depressor becomes big, influences the service life of transformer；When oil level is too low, it will influence transformer load ability,
If pasta continues to be reduced to when below the big lid of transformer, lead or iron core exposure can be made in atmosphere, be likely to result in internal flashover
Danger.Therefore, in Transformer, it is necessary to hot spot temperature of winding, loaded tap-off in real time on-line monitoring power transformer
The change of circuit-breaker oil room temperature and oil level, finds the change of key position state parameter in transformer and takes measures to eliminate in time
Hidden danger makes the operation of power transformer health and avoids accident from occurring.
With the implementation of unattended operation transformer station, transformer remote temperature and the demand of oil level monitoring is set increasingly to increase.It is right
The direct detection of inside transformer temperature can not be using conventional electric transducer temperature measurement system, and conventional method is main at present
There are thermal simulation mensuration, indirect calculating method and the direct method of measurement.For thermal simulation method, the temperature rise process of winding is run with simulation not
Identical to the greatest extent, error is larger；The thermal model method commonly used in calculating indirectly can only solve hot(test)-spot temperature value, and can not obtain the tool of focus
Body position；Most influential in the direct method of measurement is respectively based on fiber Rayleigh scattering, optical fiber Brillouin scattering, optical fiber Raman
The optical time domain reflection measuring system of scattering, the monitoring and position error for inside transformer temperature is larger, generally several to take the photograph
Family name's degree, position error is one meter or so.Monitoring to transformer oil storage oil level, conventional at present has IR thermometry, electromagnetism
Formula oil level indicator etc., but infrared thermometry is easily influenceed than larger, when temperature and differential oil temperature are small, negative by environment, space, temperature
When lotus is low, the oil level line position of shooting is obscured, it is difficult to recognized；Electromagnetic type oil level indicator method, when transformer be in high-intensity magnetic field or
It is given a shock, Electromagnetic Coupling System and pointer transmission system are vulnerable to influence, so as to influence the accuracy of oil conservater oil-level measurement；People
Work monitoring is the fluoroscopy oil level by means of pasta reflection, and its reliability and error are obvious.
Fiber-optic grating sensor (Fiber Bragg Grating, FBG) developed in recent years is a kind of new full light
Fine passive device, it is completely compatible with normal transmission optical fiber, not only certainty of measurement is high, space orientation is accurate, can overcome high voltage,
Limitation under the bad electromagnetic environments such as high current suffered by electrical type sensor application, and with sensing integrated, light weight,
Small volume, pliability are good, sensitivity is high, it is corrosion-resistant, by electromagnetic interference, essential safety, be easy to set up sensor network realize
The particular advantages such as distributed measurement, these advantages not only determine fiber-optic grating sensor in power system temperature and oil-level measurement
Aspect has prominent advantage, and enables it to accomplish real contact measurement, so that measurement result can really react quilt
Can the real work situation of measurement equipment, continue to run with security and stability with value is directly judged to institute's measurement equipment, make thing
Therefore be eliminated before generation, defect is eliminated in bud, the safe operation to whole power network plays important guarantee
Effect.The Shandong Micro-Sensing Photoelectronic Co., Ltd for being such as found in 2004 by extensive market survey, using advanced optical fiber
Grating thermometry, and independent intellectual property right fiber grating demodulation technology, being proposed can meet high-power transformer equipment thermometric
It is required that MSP-T6000 series fibre multipoint temperature monitoring systems, fundamentally solve traditional transformer temperature measuring equipment lack
Fall into., principles and side of the University Of Chongqing Zhao Tao to the inside transformer temperature monitoring based on fiber-optical grating temperature sensor in 2008
Method is studied.2008, University Of Chongqing Zhang Rui built the optical fiber based on ningxia daba power plant oil immersed type testing transformer
Grating temperature measuring table, the heating in winding situation to transformer in the case of constant load and varying duty is ground
Study carefully.2010, University On The Mountain Of Swallows lijin was carried out to the distributed fiber grating Transformer Winding on-line temperature monitoring based on FPGA
Research.2011, it is exhausted that Zhu Changfu of Ningde college of education et al. proposes a kind of transformer of Pressural Fiber Liquid Level Sensors
Edge oil level monitoring system, realizes the unmanned real time on-line monitoring to transformer oil level.
In recent years, as power industry is developed rapidly towards high voltage, large-sized unit, Large Copacity direction, in power equipment
Transformer also therewith towards complication, large scale, multifunctional direction development, failure that power transformer occurs in operation,
Failure mechanism is complicated, and the disguised strong, type and extent of failure are difficult detection, therefore, if power transformer synchronously can be obtained accurately
In suffered hot spot temperature of winding, load tap changer oil chamber temperature, oil conservater oil level etc. characterize power transformer real-time status
Multiple critical physical parameter characteristics so as to realize that the effective monitoring to operation states of electric power system provides reliable basis, this
Sample, it is conventional to meet practical application area pair towards the local devices of power transformer and the monitoring system of single parameter
Precision, real-time, the requirements at the higher level of reliability and stability.
The content of the invention：
To solve the above problems, the present invention proposes a kind of fiber grating transformer multi parameter intallingent based on Multi agent technology
Monitoring system, realizes being monitored on-line while many reference amounts in power transformer so that the safe and reliable work of power transformer, no
Only promote application of the fiber optical grating intelligent monitoring technology in the large-scale power system equipment such as power transformer, switch cubicle, and
Also the involved many physical parameter integrated monitors of labyrinth in being developed for generator that is increasingly intelligent, complicating, motor
Offer reference.
The invention discloses a kind of fiber-optic grating sensor transformer many reference amounts intellectual monitoring system based on Multi agent technology
System, including the optical fiber sensing layer of data acquisition is carried out to Operation Condition of Power Transformers, the optical fiber sensing layer collection is received
Data are simultaneously analyzed the data analysis layer for the treatment of to the data, carry out on-line analysis with the monitor layer, reception monitored simultaneously
Coordinate the center cooperation main body of monitoring result and the user interface layer of display running state of transformer；The optical fiber sensing layer includes
The Fibre Optical Sensor main body that some running statuses for power transformer are acquired, the Fibre Optical Sensor main body is optical fiber light
Gate sensor network.
Further, Fibre Optical Sensor main body includes hot spot temperature of winding Fibre Optical Sensor main body, oil conservater in optical fiber sensing layer
Oil level Fibre Optical Sensor main body and load tap changer oil chamber optical fiber temperature sensing main body.
The invention also discloses a kind of fiber grating oil level indicator for above-mentioned intelligent monitor system, including bourdon tube, institute
The one end for stating bourdon tube is the free end of sealing, and the other end of its bourdon tube is connected with oil tank of transformer mouthful, the bourdon tube
Free end be in C font structures, be pasted with fiber-optic grating sensor at the maximum strain of free end C font structures.
The present invention will be carved with the fiber-optic grating sensor of grating and be placed at the maximum strain of c-type bourdon tube, and make it with bullet
Reed pipe inner side outer wall normal direction central axis coincides, and the fiber-optic grating sensor being pasted on c-type bourdon tube is previously applied necessarily
Prestressing force, with the stretching strain for keeping fiber-optic grating sensor to keep certain in monitoring process, the different positions of oil tank of transformer
Putting can arrange multiple fiber grating oil level indicators, constitute oil conservater oil level Fibre Optical Sensor main body, so as to the oil level to transformer is carried out
Accurate monitoring.
The invention also discloses a kind of fiber Bragg grating sensor network topological structure, including by some fiber-optic grating sensors
Some paths of composition, are switched between the adjacent path by photoconductive switch.
The present invention is operated using multiple main bodys, each main body is dissolved into a system with specific exchange way
Afterwards, information will be shared, and being worked in information processing to be repeated, and efficiency is also improved therewith, the pipe between system components
Reason demand and monitoring network will also have unified planning, and the transmission of information also will without any confusion, and the function of whole system will be compared with
For powerful, the monitoring description of complete and accurate can be made to large-scale monitoring object.
The present invention proposes to be incorporated into Multi agent technology towards in the fiber optical grating intelligent monitoring system of power transformer, should
The function such as information gathering, analysis and evaluation in conventional fiber grating intelligent monitor system is converted into and undertakes different task simultaneously by system
The intelligent type of subject that can be communicated with other main bodys.Meanwhile, according to each intelligent type of subject function successively
It is divided into five layers：
Ground floor is optical fiber sensing layer, is responsible for perceiving hot spot temperature of winding, tap switch oil room temperature in power transformer
Change, the state change of oil conservater oil level, mainly by hot spot temperature of winding Fibre Optical Sensor main body, oil conservater oil level Fibre Optical Sensor master
Body, load tap changer oil chamber optical fiber temperature sensing main body composition；
The second layer is data analysis layer, at the responsible sensor signal gathered to each main body in optical fiber sensing layer
Manage and store, mainly by hot spot temperature of winding data processing main body, oil conservater oil level data processing main body, loaded tap switch oil
Room temperature data processing main body is constituted；
Third layer is intellectual monitoring layer, is responsible for reflection Winding in Power Transformer, the shunting switch to data analysis layer transmission
Grease chamber, oil conservater running status are estimated, and mainly monitor main body by coiling hotspot fault diagnosis main body, oil conservater oil level, have
On-load shunting switch grease chamber fault diagnosis main body is constituted；
4th layer is cooperative system layer, is responsible for coiling hotspot fault diagnosis main body, oil conservater oil level monitoring main body, has load
The diagnostic result of oil cabinet of tap switches fault diagnosis main body is cooperated, and Operation Condition of Power Transformers is entered with precision higher
Row comprehensive assessment；
Layer 5 is user interface main body, is responsible in real time showing the running status and assessment result of transformer.
Compared with prior art, the speed of service is fast, monitoring accuracy is high, reliability and flexibility are high for the system, will be different
Safe early warning of the power equipment of purposes under complex environment, state estimation and maintenance provide foundation, not only extend electric power and set
Standby service life, and promote the further development of power equipment intelligent monitor system.System proposed by the invention is not
Can be only employed for such as design of the large scale system such as power transformer, switch cubicle of large-scale power system equipment and intellectual monitoring neck
Domain, and for many reference amounts integrated intelligent monitoring involved in generator, motor development increasingly intelligent, complicate is carried
For using for reference.
Brief description of the drawings
Fig. 1 is multiagent fiber grating electric power intelligent transformer Monitoring System Model figure；
Fig. 2 is fiber grating oil level indicator structure chart；
Fig. 3 is the path profile of the Path1 that the present embodiment obtains all fiber-optic grating sensor signals in main body；
Fig. 4 is the path profile of the Path2 that the present embodiment obtains all fiber-optic grating sensor signals in main body；
Fig. 5 is the present embodiment localized network failure of removal schematic diagram；
Fig. 6 is the present embodiment sensor demodulation paths schematic diagram；
Fig. 7 is the present embodiment localized network failure of removal schematic diagram；
Fig. 8 is the present embodiment sensor demodulation paths schematic diagram.
Specific embodiment
Fig. 1 is the multiagent fiber grating intelligent transformer Monitoring System Model figure constructed by the present embodiment, in illustraton of model
In, whole system is decomposed into multiple subsystems being easily achieved first, and corresponding intelligent agent is converted into, make original
The serial process optical-fiber intelligent monitoring system carried out by central processing unit, is changed into a kind of parallel distributed monitoring system.
First, in optical fiber sensing layer hot spot temperature of winding Fibre Optical Sensor main body, oil conservater oil level Fibre Optical Sensor main body, have
On-load shunting switch grease chamber optical fiber temperature sensing main body is acquired to the related physical parametric data of power transformer respectively, gathers
Data transfer afterwards is analyzed treatment, the number after treatment by data analysis layer to data analysis layer to the corresponding data for obtaining
According to transmitting to intellectual monitoring layer, distinguished using artificial intelligence recognizer according to the sensor information for being obtained by intellectual monitoring layer
On-line analysis and monitoring are carried out to hot spot temperature of winding, oil conservater oil level, load tap changer oil chamber temperature, meanwhile, by
Winding failure diagnosis main body, oil conservater oil level monitoring main body in intellectual monitoring layer, load tap changer oil chamber fault diagnosis
Main body can only obtain the area monitoring's result on power transformer, it is impossible to obtain whole power transformer operation conditions or
The accuracy of its operation conditions is obtained than relatively low, therefore, they are respectively transmitted to center cooperation main body the monitoring result of oneself,
Cooperation main body'choice algorithm such as blackboard cooperation, the contract net mode such as cooperate that cooperates accordingly in center coordinates the monitoring knot of each main body
Really, comprehensive assessment is carried out to the running status of transformer with monitoring accuracy higher, and assessment result is transmitted to user interface
Layer is shown in real time.
In the multiagent fiber grating electric power intelligent transformer Monitoring System Model figure that the present embodiment is proposed, optical fiber is perceived
In layer for the Fibre Optical Sensor main body that the running status of power transformer is acquired is not limited solely to hot spot temperature of winding,
Oil conservater oil level, load tap changer oil chamber temperature, can be extended, accordingly as needed in actual monitoring system design
, data analysis layer and intellectual monitoring layer carry out Function Extension according to the extension of Fibre Optical Sensor main body in optical fiber sensing layer.Meanwhile,
Fibre Optical Sensor main body is realized using fiber-optic grating sensor in illustraton of model, and other main bodys are realized using software, transmission means
Realized using hardware and software communication modes.
Fig. 2 is fiber grating oil level indicator structure chart, including bourdon tube, one end of bourdon tube is the free end of sealing, its bullet
The other end of reed pipe is connected with oil tank of transformer mouthful, and the free end of the bourdon tube is in C font structures, in free end C fonts
Fiber-optic grating sensor is pasted with the maximum strain of structure.The fiber-optic grating sensor for being carved with grating is pasted on c-type bourdon tube
Maximum strain at, and inner side outer wall normal direction central axis coincides with bourdon tube to make it, is pasted on the optical fiber on c-type bourdon tube
Grating sensor is previously applied certain prestressing force, to keep fiber-optic grating sensor to keep certain drawing to answer in monitoring process
Become, the diverse location of oil tank of transformer can arrange multiple fiber grating oil level indicators, constitute oil conservater oil level Fibre Optical Sensor main body, from
And the oil level of transformer is accurately monitored.
In order to avoid reliability reduction problem, pin caused by Fibre Optical Sensor in fiber-optic grating sensor series topology structure
Hot spot temperature of winding Fibre Optical Sensor main body, oil conservater oil level Fibre Optical Sensor main body, load ratio bridging switch temperature grease chamber optical fiber are passed
The fiber-optic grating sensor of arrangement, is entered to the Fibre Optical Sensor in each main body using different network topology structures in sense main body
Row connection.So, in main body when certain transmission or sensor fibre is damaged or be broken, not only the sensor of body interior can enter
Row signal is mutually compensated for, and the sensor signal monitored between the main body of same parameter also can be mutually compensated for, so that
Improve the reliability of whole monitoring system.Partial failure in power transformer is passed for using photoconductive switch and its handoff technique
The method that sensor is repaired, is illustrated by taking photoconductive switch sensor network topological structure as shown in Figure 3 as an example.
When each fiber-optic grating sensor in optical fiber sensing layer is normal, can be obtained using the path of Path1 in such as Fig. 3
All fiber-optic grating sensor signals in main body are taken, changes the connection status of photoconductive switch in network, as shown in figure 4, can adopt
Be that fiber-optic grating sensor signal is resurveyed in main body with the path of Path2, i.e., for each main body, can be by light
Again the demodulation of sensor signal in the switching realization body of switch, so as to improve the reliability of sensor network in sensing main body
Property.
Certain or some transmission or sensor fibre fracture in main body is sensed, can be by the advance photoconductive switch laid
Impacted fiber-optic grating sensor finds path and realizes the self-repair function of sensor signal again.
Specifically, when optical fiber sensing layer occurs localized network failure of removal as shown in Figure 5 (in figure × shown), pass through
Photoswitch connection status as shown in Figure 5, by Path3 paths obtain fiber-optic grating sensor 1,2,3,4,5,6,7,8,9,
10,11,12,13,14 transducing signal, in order to obtain the transducing signal of sensor 15,16, controls photoconductive switch SW1 and makes it
Action, switches to connection status as shown in Figure 6, and the transducing signal of sensor 15,16 can be regained by Path4 paths,
Still whole demodulation of sensor signal can be realized in the case of so as to be broken down in certain sensing main body.When optical fiber sensing layer
When there is localized network failure of removal as shown in Figure 7 in main body, fiber-optic grating sensor 1 is obtained by Path5 paths first,
2,3,4,5,6,7,8,9,10,11,12,13,14 transducing signal.Secondly, control photoswitch SW1 act it, switch to as
Connection status shown in Fig. 8, the signal of sensor 16, final fiber-optic grating sensor 15 are regained by the path of Path6
Signal repaired, but relative to traditional network topology structure, each main body inner fiber grating sensor network can
It has been greatly enhanced by property.
The sensor in each the Fibre Optical Sensor main body in optical fiber sensing layer that the present embodiment is proposed can be according to monitoring
Number of sensors is extended the need for object, it is not limited to the number of sensors shown in legend.
Claims (4)
1. a kind of fiber-optic grating sensor transformer many reference amounts intelligent monitor system based on Multi agent technology, it is characterised in that：
Including carrying out the optical fiber sensing layer of data acquisition to Operation Condition of Power Transformers, receiving the data of the optical fiber sensing layer collection
And the data are analyzed treatment data analysis layer, carry out on-line analysis with monitoring monitor layer, receive and coordinate
The center cooperation main body of monitoring result and the user interface layer of display running state of transformer；
The optical fiber sensing layer includes the Fibre Optical Sensor main body that some running statuses for power transformer are acquired,
The Fibre Optical Sensor main body is fiber Bragg grating sensor network.
2. a kind of fiber-optic grating sensor transformer many reference amounts based on Multi agent technology according to claim 1 are intelligently supervised
Examining system, it is characterised in that：Fibre Optical Sensor main body includes hot spot temperature of winding Fibre Optical Sensor main body, storage in the optical fiber sensing layer
Oil Tank oil level Fibre Optical Sensor main body and load tap changer oil chamber optical fiber temperature sensing main body.
3. ginseng more than a kind of fiber-optic grating sensor transformer based on Multi agent technology according to claim 1 and 2 is used for
Measure the fiber grating oil level indicator of intelligent monitor system, it is characterised in that：Including bourdon tube, one end of the bourdon tube is sealing
Free end, the other end of its bourdon tube is connected with oil tank of transformer mouthful, and the free end of the bourdon tube is in C font structures,
Fiber-optic grating sensor is pasted with the maximum strain of free end C font structures.
4. a kind of fiber Bragg grating sensor network topological structure, it is characterised in that：Including being made up of some fiber-optic grating sensors
Some paths, switched over by photoconductive switch between the adjacent path.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243437A (en) * | 2019-05-09 | 2019-09-17 | 中国地质大学（北京） | A kind of cargo ship Oil Tank laser ranging system |
| CN110672156A (en) * | 2019-10-18 | 2020-01-10 | 哈尔滨朗昇电气股份有限公司 | Transformer state monitoring device with data acquisition and communication alarm functions |
| CN113267724A (en) * | 2021-06-30 | 2021-08-17 | 国网江苏省电力有限公司电力科学研究院 | On-load tap-changer on-line monitoring system of transformer |
| WO2021207097A1 (en) * | 2020-04-07 | 2021-10-14 | Nec Laboratories America, Inc. | Network sensing topologies for fiber optic sensing |
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