CN110132447A - A kind of coiling hot point of transformer temperature online monitoring system based on fiber grating - Google Patents
A kind of coiling hot point of transformer temperature online monitoring system based on fiber grating Download PDFInfo
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- CN110132447A CN110132447A CN201910308921.7A CN201910308921A CN110132447A CN 110132447 A CN110132447 A CN 110132447A CN 201910308921 A CN201910308921 A CN 201910308921A CN 110132447 A CN110132447 A CN 110132447A
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- winding temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention relates to a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating mainly includes 10 parts such as temperature collection module, winding temperature acquisition module, device parameter input module, transformer winding temperature control modules.The system can real-time and accurately learn the hot spot temperature of winding of transformer and carry out monitoring and early warning, coiling hot point of transformer temperature under the various operating conditions of transformer is predicted, it is referred to for technical staff, the safe operation and transformer to transformer allow overload and service life assessment to be of great significance.
Description
Technical field
The present invention relates to transformer online monitoring technical field, more particularly, to it is a kind of based on the transformer of fiber grating around
Group hot(test)-spot temperature on-line monitoring system.
Background technique
Power transformer is one of the core equipment in electric system, and safety and stability is for ensureing the reliable of electric system
Operation is of great significance.And temperature is excessively high, is the principal element for causing electric power transformer insulated damage, wherein winding temperature
Raising will directly influence the service life and safe operation of transformer.
Transformer is in strong-electromagnetic field environment, and ordinary electronic class sensor is interfered vulnerable to strong-electromagnetic field, transmission range, insulation
Grade and installation maintenance etc. all have significant limitation.Current most of domestic and international transformers generally use thermal simulation
Mensuration or indirect calculating method obtain winding temperature, but there is a certain error for model calculating, and the top-oil temperature measured
Variation usually lag behind the temperature change of winding.Existing measuring technique can not the transformer winding heat of accurate measurements analysis in real time
Point temperature and the variation tendency for precisely predicting temperature under different operating conditions.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to be based on fiber grating
Coiling hot point of transformer temperature online monitoring system, the hot spot temperature of winding of transformer can be real-time and accurately monitored, to change
Temperature changing trend under depressor difference operating condition is predicted, the economy and safety of transformer are effectively improved.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of coiling hot point of transformer temperature online monitoring system based on fiber grating, including transformer winding temperature control
Molding block, input terminal acquire mould with substation temperature collecting module, top-oil temperature acquisition module, bottom oil temperature respectively
Block, winding temperature acquisition module are connected with transformer load current acquisition module, and output end is respectively and for display system
The LED display module of the real-time running data of the working condition and transformer of intelligent monitoring and controlling device, for the number being calculated
According to the communication port for sending the transformer parameter that host computer and acquisition telecontrol system transmit to and for storing the transformer winding
The data memory module of the control calculated result of temperature control modules is connected, wherein the top-oil temperature acquisition module, institute
It states bottom oil temperature acquisition module and the winding temperature acquisition module is all made of fiber grating temperature sensor to measure temperature.
Further, the fiber grating temperature sensor includes ASE wideband light source, tunable TEA CO2 laser, the ring of light
Shape device, photodetector and photoswitch, the reflected light signal of the continuous spectrum of the ASE wideband light source output is through the ring of light shape
Device is transmitted in the tunable TEA CO2 laser, and the tunable TEA CO2 laser is handled by controller FPGA and digital-to-analogue conversion
When the central wavelength of transmission peak wavelength and reflected light signal afterwards is consistent, the photodetector exports largest light intensity value and passes through
It will obtain a result after the controller FPGA progress Digital Signal Processing and be sent to the transformer winding temperature control modules simultaneously
Real time temperature is shown eventually by the LED display module.
Further, the input terminal of the transformer winding temperature control modules is also and for will be by comprehensive in substation
The transformer that the transformer equipment parameter directly acquired in automated system inputs the transformer winding temperature control modules is set
Standby parameter input module is connected, and the device parameter includes transformer voltage grade and rated current.
Further, the transformer load current acquisition module uses Zero flux current sensor.
Further, the substation temperature collecting module is by directly acquiring number in complex automatic system in standing
Word amount signal is transmitted through the network in the transformer winding temperature control modules.
Further, the transformer winding temperature control modules use TMSC6000 series of digital signals processing chip with
Data analysis is monitored to calculate with winding temperature prediction.
Further, the port is using RS485 interface or RS232 interface or Ethernet interface.
Further, the winding temperature and calculate winding temperature work that the transformer winding temperature control modules are surveyed
It compares and adaptive filter algorithm is used to calculate control algolithm to correct winding temperature.
The present invention mainly passes through temperature collection module, top-oil temperature acquisition module, bottom oil temperature acquisition module, winding
Temperature collecting module, load current acquisition module, device parameter input module, transformer winding temperature control modules, LED are shown
Coiling hot point of transformer temperature online monitoring based on fiber grating that panel module, communication port and data memory module are constituted and pre-
Examining system can real-time and accurately learn the hot spot temperature of winding of transformer and carry out monitoring and early warning, to the various operating conditions of transformer
Under coiling hot point of transformer temperature predicted that refer to for technical staff, safe operation and transformer to transformer are permitted
Perhaps overload and service life assessment are of great significance.
Compared with prior art, the invention has the following advantages that
1, coiling hot point of transformer temperature is surveyed by fiber grating temperature sensor, and comprehensively considers operating condition progress
Denoising, measurement accuracy is high, high reliablity；
2, adaptive-filtering recursive algorithm is introduced, winding temperature is corrected by comparison winding temperature measured value and calculated value
Prediction accuracy is continuously improved in degree.
Detailed description of the invention
Fig. 1 is the integrated stand composition of coiling hot point of transformer temperature online monitoring system of the present invention；
Fig. 2 is the theory structure block diagram of fiber grating temperature sensor of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
Fig. 1 show the system architecture diagram of technical solution of the present invention corresponding embodiment, it can be seen that the present invention is one kind
Coiling hot point of transformer temperature online monitoring system based on fiber grating, including environment acquisition module, top-oil temperature acquire mould
Block, bottom oil temperature acquisition module, winding temperature acquisition module, load current acquisition module, device parameter input module, transformer
Winding temperature control module, LED display module, communication port and data memory module.
The working principle of the invention is with process: connecting system power supply, opens transformer environment acquisition module, transformer top
Layer oil temperature acquisition module, transformer bottom oil temperature acquisition module, transformer winding temperature collecting module, load current acquisition module
With device parameter input module, will be become by the transformer equipment parameter input directly acquired in complex automatic system in substation
Depressor winding temperature control module, device parameter include transformer voltage grade and rated current.Then starting transformer winding
Temperature control modules, transformer winding temperature control modules open the data that communication port receives various acquisition modules.With number letter
The transformer winding temperature control modules primary Calculation of number processing winding temperature, which goes out one and is stored in internal winding temperature, to be calculated
Value, it is compared with the winding temperature surveyed, and calculates algorithm based on adaptive-filtering recursive algorithm amendment winding temperature；
Calculation method after optimization is used to estimate the winding temperature under different operating conditions again, forecast assessment result is shown for technical staff
With reference to；Forecast assessment result is stored in storage module simultaneously and to later under identical operating condition, environment and monitoring data
Calculated value compare reference.
Transformer winding temperature control modules use bus structures, pile line operation and the list separated with program and data
The TMSC6000 series of digital signals processing chip of cycle operation function is monitored data analysis and calculates with winding temperature prediction.
Transformer top-oil temperature acquisition module, transformer bottom oil temperature acquisition module, transformer winding temperature collecting module
Real-time monitoring is carried out using fiber grating temperature sensor, transformer winding temperature monitoring system is mainly by optical fiber grating sensing
Device, the optical fiber for transmitting signal and fiber grating demodulation device composition；Bragg grating is made on optical fiber, when the light that light source issues
When reaching grating, grating reflects back the light of specific wavelength.The wavelength and temperature of reflected light have excellent linear relationship, lead to
The wavelength for crossing measurement fiber grating reflected light can converse the temperature of measurement point.Optical fiber grating temperature-measuring, it is only anti-due to having
Specific wavelength is penetrated, not by external electromagnetic field, chemical substance, optical power, the variation of optical path, sensor bin differences, package material
The aging of matter influences.With null offset is not generated, it is not necessarily to regular Zero calibration；In unit length signal decaying it is small, it can be achieved that
Long range measuring point Centralized Monitoring；It is that coding is widely applied with the advantage that traditional sensors are incomparable with wavelength.
Transformer load current acquisition module mainly uses zero flux small electric current sensor mutual to bushing shell for transformer side electric current
Sensor carries out real-time monitoring, and Real-time Monitoring Data carries out sampling input computing module by AD conversion module, wherein Zero flux is small
Current sensor is installed on sleeve body bottom, current signal measured by its current transformer of real-time monitoring；Current monitoring number
Photoelectric signal transformation is carried out by AD conversion module according to elder generation, then by optical cable transmission to transformer winding temperature control modules.
Substation temperature collecting module passes through net by directly acquiring digital quantity signal in complex automatic system in standing
Network is transmitted in transformer winding temperature control modules.
Transformer equipment parameter input module is used for the transformation by directly acquiring in complex automatic system in substation
Device device parameter input transformer winding temperature control module, device parameter includes transformer voltage grade and rated current.
Transformer data memory module is used to store the calculated result of transformer winding temperature control modules.
The theory structure block diagram of fiber grating temperature sensor of the invention shown in Fig. 2, including ASE wideband light source, can
Tune F-P filter, optical circulator photodetector, photoswitch；The continuous spectrum exported by ASE wideband light source extremely senses
In FBG.FBG is reflected back the optical signal of specific wavelength, and reflected light is transmitted to fibre-optical tunable wave F-P by the other end of optical circulator
In filter, tunable TEA CO2 laser driving circuit and data acquisition circuit are completed by core of controller FPGA.Circuit system
The analog signal received is converted to digital signal through A/D and is sent into FPGA analysis processing, and digital signal that treated is sent into D/A
In, and apply the digital quantity of variation to it, so that D/A converter exports sawtooth wave analog voltage, when the transmitted wave of F-P filter
When long consistent with the sensing central wavelength of FBG reflected light, photodetector exports largest light intensity value at this time, is sent into complete in FPGA
At Digital Signal Processing.Data acquisition and procession module carries out Signal acquiring and processing, carries out swarming with half-peak detection algorithm,
The influence of clutter and secondary lobe can be effectively eliminated simultaneously, to achieve the purpose that improve measurement accuracy.Processing is obtained later
As a result coiling hot point of transformer temperature control modules are sent to.Finally real time temperature is shown in LED display module.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (8)
1. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating, which is characterized in that including transformer
Winding temperature control module, input terminal are oily with substation temperature collecting module, top-oil temperature acquisition module, bottom respectively
Warm acquisition module, winding temperature acquisition module are connected with transformer load current acquisition module, output end respectively be used for
The LED display module of the real-time running data of the working condition and transformer of display system intelligent monitoring and controlling device is used for calculating
The data transmission obtained is to host computer with the communication port for acquiring the transformer parameter that telecontrol system transmits and for storing the change
The data memory module of the control calculated result of depressor winding temperature control module is connected, wherein the top-oil temperature is adopted
Collection module, the bottom oil temperature acquisition module and the winding temperature acquisition module are all made of fiber grating temperature sensor to survey
Amount temperature.
2. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the fiber grating temperature sensor includes ASE wideband light source, tunable TEA CO2 laser, optical circulator, light
The reflected light signal of electric explorer and photoswitch, the continuous spectrum of the ASE wideband light source output is transmitted through the optical circulator
To in the tunable TEA CO2 laser, the tunable TEA CO2 laser passes through saturating after controller FPGA processing and digital-to-analogue conversion
When ejected wave is long consistent with the central wavelength of reflected light signal, the photodetector exports largest light intensity value and passes through the control
It will obtain a result after device FPGA progress Digital Signal Processing processed and be sent to the transformer winding temperature control modules and finally lead to
It crosses the LED display module and shows real time temperature.
3. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the input terminal of the transformer winding temperature control modules is also and for will be by integrated automated in substation
The transformer equipment parameter that the transformer equipment parameter directly acquired in system inputs the transformer winding temperature control modules is defeated
Enter module to be connected, the device parameter includes transformer voltage grade and rated current.
4. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the transformer load current acquisition module uses Zero flux current sensor.
5. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the substation temperature collecting module is by directly acquiring digital quantity signal in complex automatic system in standing
It is transmitted through the network in the transformer winding temperature control modules.
6. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the transformer winding temperature control modules use TMSC6000 series of digital signals processing chip to be monitored
Data analysis is calculated with winding temperature prediction.
7. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the port is using RS485 interface or RS232 interface or Ethernet interface.
8. a kind of coiling hot point of transformer temperature online monitoring system based on fiber grating according to claim 1,
It is characterized in that, the winding temperature that the transformer winding temperature control modules are surveyed is compared and adopted with calculating winding temperature
Control algolithm is calculated with adaptive filter algorithm to correct winding temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308921.7A CN110132447A (en) | 2019-04-17 | 2019-04-17 | A kind of coiling hot point of transformer temperature online monitoring system based on fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910308921.7A CN110132447A (en) | 2019-04-17 | 2019-04-17 | A kind of coiling hot point of transformer temperature online monitoring system based on fiber grating |
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Cited By (4)
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| CN111579116A (en) * | 2020-05-22 | 2020-08-25 | 贵州电网有限责任公司 | External optical fiber temperature controller based on grating temperature measurement technology and temperature measurement method |
| CN113551792A (en) * | 2021-07-07 | 2021-10-26 | 贵州乌江水电开发有限责任公司 | Anti-interference capability improving method for PLC temperature module |
| CN113945299A (en) * | 2021-09-15 | 2022-01-18 | 广西电网有限责任公司电力科学研究院 | Method for predicting temperature distribution and residual life of transformer winding |
| CN116068322A (en) * | 2023-03-07 | 2023-05-05 | 常州太平洋电力设备(集团)有限公司 | Method, system and server for online monitoring of comprehensive parameters of coiled core transformer |
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Application publication date: 20190816 |