CN104236752A - Oil-immersed transformer temperature measuring system - Google Patents
Oil-immersed transformer temperature measuring system Download PDFInfo
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- CN104236752A CN104236752A CN201410475425.8A CN201410475425A CN104236752A CN 104236752 A CN104236752 A CN 104236752A CN 201410475425 A CN201410475425 A CN 201410475425A CN 104236752 A CN104236752 A CN 104236752A
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- demodulating system
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- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an oil-immersed transformer temperature measuring system. The oil-immersed transformer temperature measuring system comprises a fiber bragg grating sensor, a grating signal demodulating system and a signal processing display instrument, wherein the fiber bragg grating sensor is arranged on a winding detection point of an oil-immersed transformer and used for obtaining a winding temperature signal of the transformer, the grating signal demodulating system is used for receiving signal data obtained by the fiber bragg grating sensor and obtaining a temperature signal through demodulation, the signal processing display instrument is used for displaying result information generated after the grating signal demodulating system carries out signal processing, and a high-temperature resisting protection sleeve is arranged outside the fiber bragg grating sensor. A high-temperature resisting coating is arranged outside the sensor, and the fiber bragg grating sensor has good high-temperature resisting oil immersion performance and can be placed in the transformer insulating oil for a long time to be used. The fiber bragg grating sensor is packaged in an insulating protection layer, and the problems that indirect electrical sensor measurement is not accurate, not timely and not visual are avoided.
Description
Technical field
The present invention relates to a kind of fiber optic temperature measurement system, particularly a kind of oil-filled transformer temperature measurement system based on optical fiber grating sensing.
Background technology
Power transformer is one of most important equipment in electric system, and its reliability is directly connected to whether safe, efficient, the economic operation of electrical network.The life termination of major part transformer is because it loses due insulating capacity, and winding temperature when the main factor affecting insulating capacity is transformer operation.The temperature reached in the most thermal region of Transformer Winding is also the main limiting factor of transformer load value.Therefore monitor inside transformer temperature to the permission overload of transformer and operation life significant.
Therefore a kind of temperature signal accurately can measuring oil-filled transformer is needed.
Summary of the invention
In view of this, technical matters to be solved by this invention is to provide a kind of temperature signal accurately can measuring oil-filled transformer.
The object of the invention is to propose a kind of oil-filled transformer temperature measurement system.
The object of the invention is to be achieved through the following technical solutions:
A kind of oil-filled transformer temperature measurement system provided by the invention, comprises fiber-optic grating sensor, grating signal demodulating system and signal transacting Displaying Meter; Described fiber-optic grating sensor is arranged on the winding sensing point of oil-filled transformer, for obtaining Transformer Winding temperature signal; Described grating signal demodulating system, for receiving the signal data that fiber-optic grating sensor obtains, and demodulates temperature signal; Described signal transacting Displaying Meter, for show carry out signal transacting by grating signal demodulating system after the object information that produces; Described fiber-optic grating sensor outer setting has high temperature resistant protective casing.
Further, insulating protective layer and sender unit is also provided with in described high temperature resistant protective casing, described insulating protective layer is arranged between high temperature resistant protective casing and fiber-optic grating sensor, and the temperature signal that described sender unit is used for fiber-optic grating sensor obtains is sent to grating signal demodulating system by radio signal; Described grating signal demodulating system obtains the radio signal of sender unit transmission by signal receiving device.
Further, described grating signal demodulating system employing Raman scattering temperature demodulation obtains the actual temperature value in temperature field to be measured.
Further, described grating signal demodulating system adopts linear superposition algorithm to carry out denoising to acquisition temperature signal.
Further, described grating signal demodulating system is provided with self-adaptive control module, and the radio signal of launching of described sender unit is connected with grating signal demodulating system by self-adaptive control module.
Further, also comprise alarm control unit, the alarm control signal output terminal of described letter alarm control unit number and processes and displays Instrument connection.
Beneficial effect of the present invention is: the present invention establishes high temperature resistant coat by the sensing grating outside at fiber grating, optical fiber grating temperature-measuring sensor is made to have good high temperature resistant oil immersion performance, can be placed in transformer insulation oil for a long time and use, and immersion oil inside transformer winding can be realized measure with the direct temperature at other key monitoring positions; Fiber-optic grating sensor is encapsulated in insulating protective layer, avoids inaccurate, the not in time and not problem intuitively of electric information sensor indirect inspection; Send detectable signal by sender unit, make system installation connect more simple, extend the serviceable life of fiber-optic grating sensor.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
A kind of oil-filled transformer temperature measurement system figure that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
A kind of oil-filled transformer temperature measurement system that Fig. 1 provides for the embodiment of the present invention, as shown in the figure: a kind of oil-filled transformer temperature measurement system provided by the invention, comprises fiber-optic grating sensor, grating signal demodulating system and signal transacting Displaying Meter; Described fiber-optic grating sensor is arranged on the winding sensing point of oil-filled transformer, for obtaining Transformer Winding temperature signal; Described grating signal demodulating system, for receiving the signal data that fiber-optic grating sensor obtains, and demodulates temperature signal; Described signal transacting Displaying Meter, for show carry out signal transacting by grating signal demodulating system after the object information that produces; Described fiber-optic grating sensor outer setting has high temperature resistant protective casing.
Insulating protective layer and sender unit is also provided with in described high temperature resistant protective casing, described insulating protective layer is arranged between high temperature resistant protective casing and fiber-optic grating sensor, and the temperature signal that described sender unit is used for fiber-optic grating sensor obtains is sent to grating signal demodulating system by radio signal; Described grating signal demodulating system obtains the radio signal of sender unit transmission by signal receiving device.
Described grating signal demodulating system employing Raman scattering temperature demodulation obtains the actual temperature value in temperature field to be measured.
Described grating signal demodulating system adopts linear superposition algorithm to carry out denoising to acquisition temperature signal.
Described grating signal demodulating system is provided with self-adaptive control module, and the radio signal of launching of described sender unit is connected with grating signal demodulating system by self-adaptive control module.
Also comprise alarm control unit, the alarm control signal output terminal of described letter alarm control unit number and processes and displays Instrument connection.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope that the present invention limits.
Claims (6)
1. an oil-filled transformer temperature measurement system, is characterized in that: comprise fiber-optic grating sensor, grating signal demodulating system and signal transacting Displaying Meter; Described fiber-optic grating sensor is arranged on the winding sensing point of oil-filled transformer, for obtaining Transformer Winding temperature signal; Described grating signal demodulating system, for receiving the signal data that fiber-optic grating sensor obtains, and demodulates temperature signal; Described signal transacting Displaying Meter, for show carry out signal transacting by grating signal demodulating system after the object information that produces; Described fiber-optic grating sensor outer setting has high temperature resistant protective casing.
2. according to claim 1, it is characterized in that: in described high temperature resistant protective casing, be also provided with insulating protective layer and sender unit, described insulating protective layer is arranged between high temperature resistant protective casing and fiber-optic grating sensor, and the temperature signal that described sender unit is used for fiber-optic grating sensor obtains is sent to grating signal demodulating system by radio signal; Described grating signal demodulating system obtains the radio signal of sender unit transmission by signal receiving device.
3. according to claim 1, it is characterized in that: described grating signal demodulating system adopts Raman scattering temperature demodulation to obtain the actual temperature value in temperature field to be measured.
4. the temperature measurement system based on optical fiber grating sensing according to claim 1, is characterized in that: described grating signal demodulating system adopts linear superposition algorithm to carry out denoising to acquisition temperature signal.
5. the temperature measurement system based on optical fiber grating sensing according to claim 1, it is characterized in that: described grating signal demodulating system is provided with self-adaptive control module, the radio signal of launching of described sender unit is connected with grating signal demodulating system by self-adaptive control module.
6. the temperature measurement system based on optical fiber grating sensing according to claim 1, is characterized in that: also comprise alarm control unit, the alarm control signal output terminal of described letter alarm control unit number and processes and displays Instrument connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475425.8A CN104236752A (en) | 2014-09-17 | 2014-09-17 | Oil-immersed transformer temperature measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475425.8A CN104236752A (en) | 2014-09-17 | 2014-09-17 | Oil-immersed transformer temperature measuring system |
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| CN104236752A true CN104236752A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410475425.8A Pending CN104236752A (en) | 2014-09-17 | 2014-09-17 | Oil-immersed transformer temperature measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334008A (en) * | 2015-11-27 | 2016-02-17 | 中国电力科学研究院 | Performance detecting device for optical fiber type oil temperature sensor for transformer |
| 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 |
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| CN203249709U (en) * | 2013-02-28 | 2013-10-23 | 辽宁省电力有限公司营口供电公司 | Optical fiber temperature sensor used for oil-immersed transformer winding |
| CN103487164A (en) * | 2013-09-16 | 2014-01-01 | 昆明理工大学 | Optical fiber Bragg grating temperature sensor for monitoring temperature of transformer core and using method thereof |
| CN203561449U (en) * | 2013-09-13 | 2014-04-23 | 国家电网公司 | A buried cable intermediate connector temperature online monitoring system |
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| CN2760526Y (en) * | 2004-12-10 | 2006-02-22 | 淄博思科电子技术开发有限公司 | Distributed optical fibre raster temperature detecting system |
| WO2006135994A1 (en) * | 2005-06-21 | 2006-12-28 | Siemens Ltda. | System and method for monitoring and controlling the operational condition of a power transformer |
| CN201892586U (en) * | 2010-09-06 | 2011-07-06 | 国网电力科学研究院武汉南瑞有限责任公司 | Optical fiber grating-based internal temperature detection system for transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334008A (en) * | 2015-11-27 | 2016-02-17 | 中国电力科学研究院 | Performance detecting device for optical fiber type oil temperature sensor for transformer |
| CN105334008B (en) * | 2015-11-27 | 2020-01-17 | 中国电力科学研究院 | Optical fiber type oil temperature sensor performance detection device for transformer |
| 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 |
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Application publication date: 20141224 |
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