CN110220614A - Transformer winding temperature measurement system and measurement method based on Raman scattering - Google Patents
Transformer winding temperature measurement system and measurement method based on Raman scattering Download PDFInfo
- Publication number
- CN110220614A CN110220614A CN201910609242.3A CN201910609242A CN110220614A CN 110220614 A CN110220614 A CN 110220614A CN 201910609242 A CN201910609242 A CN 201910609242A CN 110220614 A CN110220614 A CN 110220614A
- Authority
- CN
- China
- Prior art keywords
- temperature
- transformer winding
- optic
- distribution type
- type fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- G01K11/324—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 using Raman scattering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of transformer winding distributed temperature measurements system and measurement method based on Raman scattering, utilize the temperature sensitive effect of light Raman Back Scattering, it is measured using bulk temperature distribution situation of the distribution type fiber-optic to transformer winding, the state of temperature for obtaining winding in real time, avoids the generation of overheating fault.Compared to traditional point type temperature monitoring means, distribution type fiber-optic can continuously perceive the temperature information along optical fiber direction, obtain transformer winding three-dimensional temperature field situation of change.The present invention can carry out dynamic realtime, distributed monitoring to large-scale power transformer winding temperature rise state, and easy to operate, so very big that improve measurement efficiency, application value with higher.
Description
Technical field
The present invention relates to a kind of transformer winding temperature measurement system and measurement methods, more particularly to one kind to be dissipated based on Raman
The transformer winding temperature measurement system and measurement method penetrated, belong to power transformer studying technological domain.
Background technique
Power transformer is one of important equipment indispensable in electric system, and safe and reliable operation directly affects
The reliability and security of Operation of Electric Systems.Counted according to related data, winding be the higher position of transformer fault rate it
One, and winding local pyrexia is to influence an important factor for transformer winding operates normally, this overheating will cause insulating paper
The materials accelerated ageing such as plate, insulating oil, meanwhile, hot spot temperature of winding is also the main limiting factor of transformer load value.Cause
This is monitored transformer winding temperature and is of great significance.
Currently, mainly obtaining transformer winding temperature using the direct method of measurement, thermoelectricity analogy method and indirect calculating method both at home and abroad
Degree.The direct method of measurement directly acquired by temperature sensors such as fluorescence optical fiber pre-buried in transformer winding, fiber gratings around
Group temperature.But this method is usually point type or quasi-distributed thermometric, and temperature sensor used is often pre- according to design experiences
It buries, it is difficult to be accurately located coiling hotspot position, this method is caused to there is certain limitation in practical applications.Thermoelectricity analogy method
Based on analog theory, reflect winding temperature by the way that the thermal circuit model of inside transformer is converted to circuit model, according to
This method establishes the winding thermal circuit model based on top-oil temperature with clear physical significance, and subsequent studies in China person is in the heat
The more accurate winding thermal circuit model based on bottom oil temperature and improvement based on this model are established on the basis of the model of road
Thermal circuit model.But this method analytical calculation is relatively complicated, and cannot reflect comprehensively transformer cooling system, loss etc. because
Influence of the element to temperature.Indirect calculating method passes through corresponding heat letter according to parameters such as oil tank of transformer wall temperature and environment temperatures
Change model and comes calculating transformer winding temperature, this method feasibility with higher.But most common hot simplified model
The regional disparity and dynamic variation characteristic of transformer station high-voltage side bus condition are had ignored, leading to calculated result, there are large errors.
Distribution type fiber-optic is with size is small, heat resistance is good, electromagnetism interference is strong, excellent convenient for control, sensitivity height etc.
Point, can the physical messages such as temperature, stress, vibration to measurand detect, be widely used in medicine, petroleum, agricultural,
The fields such as civil engineering are a kind of distributed optical fiber sensing technologies.Raman optical time domain reflectometer (Raman Optical Time
Domain Reflectometer, ROTDR) Temperature Distribution can be measured, there is boundless prospect.Therefore, the present invention mentions
A kind of transformer winding distributed temperature measurements system and measurement method based on Raman scattering out.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of transformer winding distributed temperatures based on Raman scattering that reflects
Spend measuring system and measurement method.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
Technical solution one:
A kind of transformer winding distributed temperature measurements system based on Raman scattering, including ROTDR system, distributed light
Fibre, transformer winding, host and display；Transformer winding one end connects ROTDR system, other end warp through distribution type fiber-optic
Host connects display；
The Strength Changes of ROTDR system detection distribution type fiber-optic Raman Back Scattering as caused by temperature change,
According to the echo time of the inside light velocity of distribution type fiber-optic and Raman Back Scattering light, the real time temperature of transformer winding is obtained simultaneously
Temperature spot is positioned；Host and display are used to show the real time temperature of transformer winding.
Technical solution two: the measurement method for measuring system described in technical solution one, comprising the following steps:
Step 1: temperature calibration:
Step 1-A: 40-60 meters of distribution type fiber-optic relaxation coilings are taken to be put into the water bath with thermostatic control that temperature-controlled precision is ± 0.005 DEG C
In case；
Step 1-B: setting gradually constant water bath box operating temperature is 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, to water-bath
After box temperature degree is stablized, using the temperature of temp measuring system measurement distribution type fiber-optic, with the operating temperature value of corresponding constant water bath box into
Row comparison obtains correction temperature difference；
Step 2: winding temperature detection:
Step 2-A: distribution type fiber-optic is fixed on winding surface；
Step 2-B: the temperature of transformer winding at room temperature is measured；
Step 2-C: applying nominal load to transformer winding, it made to heat up under normal operating conditions, measurement heating
The thermo parameters method of transformer winding in the process；
Step 2-D: thermo parameters method is corrected using correction temperature difference；
Step 2-E: it is hot localised points that temperature, which is higher than 1-2 times of position of normal condition temperature, in temperature field.
The beneficial effects of adopting the technical scheme are that
1, the present invention carries out the monitoring of dynamic realtime to the temperature change of transformer winding, obtains transformer winding entirety
Thermo parameters method characteristic, improves measurement efficiency and accuracy；.
2, the present invention is accurately positioned the hot(test)-spot temperature of transformer winding temperature using the realization of ROTDR technology, is distributed
Formula optical fiber is both measuring cell and sensing element, is not needed in the additional mounting temperature sensor of inside transformer；
3, the present invention carries out dynamic realtime, distributed monitoring to Large Oil immersion transformer winding temperature change, and grasps
Make simply, it is so very big that improve test efficiency, test application value with higher.
Detailed description of the invention
Fig. 1 is the distributed fiber optic temperature calibration system schematic diagram in the present embodiment；
Fig. 2 is the distributed fiber optic temperature calibration result figure in the present embodiment；
Fig. 3 is the transformer winding distributed temperature measurements system diagram based on Raman scattering in the present embodiment；
Wherein: 1- thermostatic water-circulator bath pot, 2- distribution type fiber-optic, 3- tail optical fiber, 4- matched host machine and display,
5- transformer winding.
Specific embodiment
Exemplary embodiment of the invention is specifically described with reference to the accompanying drawing.
Embodiment 1:
A kind of transformer winding distributed temperature measurements system based on Raman scattering, including ROTDR system, distributed light
Fibre, transformer winding, host and display；Transformer winding one end connects ROTDR system, other end warp through distribution type fiber-optic
Host connects display；
The Strength Changes of ROTDR system detection distribution type fiber-optic Raman Back Scattering as caused by temperature change,
According to the echo time of the inside light velocity of distribution type fiber-optic and Raman Back Scattering light, the real time temperature of transformer winding is obtained simultaneously
Temperature spot is positioned；Host and display are used to show the real time temperature of transformer winding.
The transformer winding distributed temperature measurements system based on Raman scattering further includes power supply, and the power supply can
Voltage needed for being provided to Raman optical time domain reflectometer.
The ROTDR system is the distributed fiber optic temperature detection system of Weihai northeast part of China photoelectricity production, and concrete specification is shown in Table
1。
Distribution type fiber-optic selects long winged 50/125 (OM3-300) high temperature resistant type multimode fibre to be used as measurement and sensor fibre,
The optical fiber uses polyimide coating layer, and maximum operating temperature meets wanting for inside transformer hot environment measurement up to 150 DEG C
It asks.Meanwhile optical fiber sheath material select ethylene-tetrafluoroethylene copolymer (Ethylene-tetrafluoroethylene,
ETFE).The mechanical performance and insulation performance of ETFE is good, change of tolerable 120 DEG C or more of the high temperature without character；
The specification of OM3-300 type distribution type fiber-optic is shown in Table 2.
Arrangement of the distribution type fiber-optic in transformer winding are as follows: distribution type fiber-optic is placed in the wide face of winding,
Distribution type fiber-optic is fixed on winding surface with viscose.It is this arrangement neither change winding construction, also make distribution type fiber-optic not by
External oil stream is dynamic, vibration and turn-to-turn extruding force influence；Meanwhile when transformer operates normally or hot-spot occurs, around
Group entirety or local heating, optical fiber is also by the variation of temperature sensor simultaneously, temperature rise synchronous with winding, by detection fiber backwards to drawing
The variation of graceful scattered signal can determine whether winding state.To draw transducing signal, head end blind area and tail end reflection are eliminated to measurement
As a result error caused by is separately connected 20m optical fiber pigtail in the two ends of transformer winding.
Technical solution two: the measurement method for measuring system described in embodiment 1, comprising the following steps:
Step 1: temperature calibration:
100 meters of ETFE tight tube fibers to be calibrated are taken when calibration, and distribution type fiber-optic head end is accessed into ROTDR system through wire jumper.
Step 1-A: 40-60 meters of distribution type fiber-optic relaxation coilings are taken to be put into the water bath with thermostatic control that temperature-controlled precision is ± 0.005 DEG C
In case；
Step 1-B: setting gradually constant water bath box operating temperature is 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, to water-bath
After box temperature degree is stablized, using the temperature of temp measuring system measurement distribution type fiber-optic, with the operating temperature value of corresponding constant water bath box into
Row comparison obtains correction temperature difference；
Step 2: winding temperature detection:
Step 2-A: distribution type fiber-optic is fixed on winding surface；
Step 2-B: the temperature of transformer winding at room temperature is measured；
Step 2-C: applying nominal load to transformer winding, it made to heat up under normal operating conditions, measurement heating
The thermo parameters method of transformer winding in the process；
Step 2-D: thermo parameters method is corrected using correction temperature difference；
Step 2-E: it is hot localised points that temperature, which is higher than 1-2 times of position of normal condition temperature, in temperature field.
ROTDR system, mainly by the Raman Back Scattering principle in optical fiber, passes through ROTDR principle to the detection of temperature
Fiber orientation is carried out, temperature detection is carried out according to the temperature effect of the Raman Back Scattering light at each position of optical fiber.Stoke
Distribution difference of the power of this light and anti-Stokes light on all -fiber is as follows:
Anti-Stokes optical power:
Stokes optical power:
In formula: PasFor anti-Stokes optical power；For PsStokes optical power；P0Distributed light is injected into for laser
Optical power in fibre；KaAnd KsFor the raman scattering cross section coefficient of anti-Stokes light and stokes light；SbFor distribution type fiber-optic back
To dispersion factor；vaAnd vsFor the Raman photon frequency of anti-Stokes light and stokes light；H is planck constant；K is wave
The graceful constant of Wurz；α0、αaAnd αsIt is the optical fibre transmission loss factor of incident light, anti-Stokes light and stokes light respectively；L
For distribution type fiber-optic length.
Since anti-Stokes light intensity is more more sensitive than stokes light to the variation of temperature, anti-Stokes light can be passed through
Single channel demodulation method, anti-Stokes light and stokes light two-way demodulation method carry out the Temperature Distribution of detection fiber.It is logical
Cross introducing reference temperature T0, the ratio of two paths of signals is obtained, optical fiber attenuation, the Temperature Distribution of available optical fiber are eliminated are as follows:
The specific course of work are as follows:
1 temperature calibration
Before measuring transformer winding temperature, there is good temperature sensing performance to verify the distribution type fiber-optic,
Distributed fiber optic temperature calibrating platform is built, temperature calibration is carried out to ETFE tight tube fiber, as shown in Figure 1.
From Fig. 2 analysis it is found that the distribution type fiber-optic have good temperature sensing performance, and the Temperature Distribution of optical fiber compared with
Uniformly, illustrate that this fibre optic installations method has practical feasibility.Further to analyze temperature rise test as a result, by distribution type fiber-optic
Temperature Distribution measured by temp measuring system and the temperature value of water bath with thermostatic control compare, the results showed that, distributed fiber optic temperature with
Worst error≤1 DEG C of water bath with thermostatic control temperature further illustrates the accuracy of the thermometry.
Transformer winding distributed temperature measurements system based on Raman scattering is as shown in Figure 3.By distributed light when detection
Fibre is placed in the wide face of winding, and distribution type fiber-optic is fixed on winding surface with viscose.
Although above-described embodiment expresses certain embodiments of the invention, its content is only to facilitate understand this hair
Bright technical solution and the embodiment used, are not intended to limit the present invention.It should be pointed out that for any of this field
It, can also be in form of implementation and details under the premise of not departing from core technology scheme proposed by the present invention for technical staff
On make it is any modification and variation.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Table 1
Table 2
Claims (2)
1. a kind of transformer winding distributed temperature measurements system based on Raman scattering, it is characterised in that: including ROTDR system
System, distribution type fiber-optic, transformer winding, host and display；Transformer winding one end connects ROTDR system through distribution type fiber-optic
System, the other end connect display through host；
The Strength Changes of ROTDR system detection distribution type fiber-optic Raman Back Scattering as caused by temperature change, according to
The echo time of the light velocity and Raman Back Scattering light, obtains transformer winding real time temperature and to local temperature inside distribution type fiber-optic
Degree maximum point is positioned；Host and display are for showing the real-time temperature information of transformer winding.
2. being used for a kind of measurement of the transformer winding distributed temperature measurements system based on Raman scattering described in claim 1
Method, it is characterised in that: the following steps are included:
Step 2-A: distribution type fiber-optic is fixed on winding surface；
Step 2-B: the temperature of transformer winding at room temperature is measured；
Step 2-C: nominal load is applied to transformer winding, it is made to heat up under normal operating conditions, measures temperature-rise period
The thermo parameters method of middle transformer winding；
Step 2-D: thermo parameters method is corrected using correction temperature difference；
Step 2-E: it is hot localised points that temperature, which is higher than 1-2 times of position of normal condition temperature, in temperature field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609242.3A CN110220614A (en) | 2019-07-08 | 2019-07-08 | Transformer winding temperature measurement system and measurement method based on Raman scattering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609242.3A CN110220614A (en) | 2019-07-08 | 2019-07-08 | Transformer winding temperature measurement system and measurement method based on Raman scattering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110220614A true CN110220614A (en) | 2019-09-10 |
Family
ID=67812275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910609242.3A Withdrawn CN110220614A (en) | 2019-07-08 | 2019-07-08 | Transformer winding temperature measurement system and measurement method based on Raman scattering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110220614A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013997A (en) * | 2020-09-09 | 2020-12-01 | 国网辽宁省电力有限公司电力科学研究院 | On-site calibration device and method for cable tunnel distributed optical fiber temperature measurement system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150800A (en) * | 2007-12-21 | 2009-07-09 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber sensor, and distortion and temperature measuring method using optical fiber sensor |
| CN101949745A (en) * | 2010-09-08 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Monitoring system of internal temperature and stress of power transformer winding and monitoring method thereof |
| KR101095590B1 (en) * | 2009-10-30 | 2011-12-19 | 동의대학교 산학협력단 | Method for measuring temperature distribution using Raman ???? temperature sensor |
| CN103791848A (en) * | 2014-01-16 | 2014-05-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer winding monitoring system based on optical fiber sensing technology |
| CN109115118A (en) * | 2018-07-25 | 2019-01-01 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer winding detection system based on distributing optical fiber sensing |
-
2019
- 2019-07-08 CN CN201910609242.3A patent/CN110220614A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150800A (en) * | 2007-12-21 | 2009-07-09 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber sensor, and distortion and temperature measuring method using optical fiber sensor |
| KR101095590B1 (en) * | 2009-10-30 | 2011-12-19 | 동의대학교 산학협력단 | Method for measuring temperature distribution using Raman ???? temperature sensor |
| CN101949745A (en) * | 2010-09-08 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Monitoring system of internal temperature and stress of power transformer winding and monitoring method thereof |
| CN103791848A (en) * | 2014-01-16 | 2014-05-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer winding monitoring system based on optical fiber sensing technology |
| CN109115118A (en) * | 2018-07-25 | 2019-01-01 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer winding detection system based on distributing optical fiber sensing |
Non-Patent Citations (1)
| Title |
|---|
| 张重远等: ""基于ROTDR的变压器绕组温度测量方法研究"", 《高压电器》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013997A (en) * | 2020-09-09 | 2020-12-01 | 国网辽宁省电力有限公司电力科学研究院 | On-site calibration device and method for cable tunnel distributed optical fiber temperature measurement system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107003473B (en) | Different cores in a multicore fiber for strain and temperature separation | |
| CN109115118B (en) | Transformer winding detection system based on distributed optical fiber sensing | |
| CN111665462B (en) | Quench detection device and quench detection method for high-temperature superconducting magnet | |
| EP3394584B1 (en) | Fibre optic temperature measurement | |
| CN105788749B (en) | Intelligent photoelectric composite cable for monitoring local large deformation of structure and monitoring method | |
| CN112067155B (en) | Lithium battery temperature dynamic monitoring method based on OFDR | |
| Zhao et al. | On-line monitoring system of 110 kV submarine cable based on BOTDR | |
| CN105136176B (en) | A kind of fibre optical sensor and preparation method thereof | |
| CN207147667U (en) | A kind of back-shaped strip sensor of carbon fiber prepreg encapsulation | |
| CN103364112A (en) | Parameter calibration and automatic correction method for distributed optical fiber temperature measurement system | |
| CN103424137A (en) | Position calibration method and device for distributed optical fiber sensing system | |
| CN103076108A (en) | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) | |
| CN106441652A (en) | FBG (fiber bragg grating) anchor rod testing device and method for avoiding temperature and strain cross sensitivity | |
| CN103245691B (en) | Method for measuring thermal resistance of three-core cable packing layer | |
| CN103808428B (en) | With fiber Bragg grating sensor temperature of the measurement and the device and method of radioactive ray | |
| CN104635079A (en) | Electric aerial optical cable carrying capacity monitoring method based on whole-course distribution way | |
| CN109974886B (en) | Demodulation method of distributed Raman fiber sensing system | |
| CN110057471A (en) | A kind of cable distribution optical fiber temperature measurement system calibration equipment and method | |
| CN209764294U (en) | Long-distance cable continuous temperature monitoring system with automatic division of monitoring area | |
| CN110696179A (en) | Method for laying concrete sensing optical fiber | |
| CN203534614U (en) | Position calibration device used for distributed optical fiber sensing system | |
| CN211602199U (en) | Optical fiber sensor for monitoring granary temperature | |
| CN110220614A (en) | Transformer winding temperature measurement system and measurement method based on Raman scattering | |
| CN101586989B (en) | Fiber grating temperature sensor for electrolytic bath shell | |
| CN115452196A (en) | Device and method for testing high-precision temperature sensitivity coefficient of optical fiber sensing ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190910 |
|
| WW01 | Invention patent application withdrawn after publication |