CN104034442A - Transformer oil temperature online monitoring device - Google Patents

Transformer oil temperature online monitoring device Download PDF

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Publication number
CN104034442A
CN104034442A CN201310754405.XA CN201310754405A CN104034442A CN 104034442 A CN104034442 A CN 104034442A CN 201310754405 A CN201310754405 A CN 201310754405A CN 104034442 A CN104034442 A CN 104034442A
Authority
CN
China
Prior art keywords
temperature
transformer oil
transformer
microcomputer
optical cable
Prior art date
Application number
CN201310754405.XA
Other languages
Chinese (zh)
Inventor
何进
Original Assignee
江苏有能电力自动化有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 江苏有能电力自动化有限公司 filed Critical 江苏有能电力自动化有限公司
Priority to CN201310754405.XA priority Critical patent/CN104034442A/en
Publication of CN104034442A publication Critical patent/CN104034442A/en

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Abstract

The invention relates to a transformer oil temperature online monitoring device, and belongs to the technical field of transformer oil online monitoring. The device comprises a temperature measurement host, an optical cable, a fiber Bragg grating temperature sensor and a microcomputer. The optical cable is connected with the fiber Bragg grating temperature sensor and the temperature measurement host. The temperature measurement host is connected with the microcomputer. Transformer oil temperature and environment temperature are detected by the fiber Bragg grating temperature sensor. The optical cable is mainly used for transmitting an optical signal. The temperature measurement host is mainly used for analyzing optical data transmitted by the optical cable and providing concrete temperature data to the microcomputer according to an electric power industry communication protocol standard (CDT stipulations) so that a fiber grating temperature measurement technology is integrated into transformer oil temperature online monitoring. A fiber grating demodulation technology is utilized so that the device has advantages of being high in insulation degree without influence of electromagnetic environment, suitable for transmission of long-distance and high-quality signals, high in measurement precision, etc.

Description

Transformer oil temperature on-Line Monitor Device

Technical field

The invention belongs to transformer oil on-line monitoring technique field, relate in particular to a kind of transformer oil temperature on-Line Monitor Device.

Background technology

Power transformer is a visual plant in electric power system, its safe operation situation has directly determined the safety operation level of whole electric system, in transformer online monitoring technical research, transformer oil chromatographic on-line monitoring is to be subject to one of transformer online monitoring method that domestic power department is welcome, on-the-spot utilization product quantity is maximum at present.By kind, content and the variation tendency of monitoring oil dissolved gas, the latency fault that just can analyze the inner existence of judgment device also can be grasped the development of fault at any time, realizes the repair based on condition of component of transformer.And due to transformer adopting enclosed construction, radiating effect is poor, heat accumulation is large, and for a long time in high voltage, large electric current and oepration at full load state, directly cause heat to assemble aggravation, temperature rising, threaten electrical insulation properties, the running temperature of therefore monitoring in real time transformer seems extremely important to network system.

Mostly the temperature testing equipment of current transformer is based on the electric transducer such as thermopair, thermal resistance, this thermometric mode is subject to the factor impacts such as electromagnetic interference (EMI), transmission range, conductor resistance, make to measure generation error, particularly long-distance transmissions can cause measuring 10-20 DEG C of error of generation, measuring oil temperature as existing transformer oil chromatographic on-line monitoring is that oil chromatography device arrives device interior after transformer is got hydraulic fluid port to get oil after one section of pipeline, then measuring by thermal resistance, is obviously to play the effect that ensures transformer safety.

Chinese Patent Application No. is: 201020518443.7 provide a kind of transformer internal temperature detection system based on fiber grating, realize the real-time measurement of the inner multi-point temp of transformer by fiber-optic grating sensor, measurement range is 0 DEG C-200 DEG C, measuring accuracy is better than 1 DEG C, the positioning precision of thermometric is better than 0.1 meter, but is not applied in transformer oil chromatographic on-line monitoring.

Summary of the invention

For above-mentioned technical matters, the invention provides a kind of transformer oil chromatographic on-line monitoring equipment.

For solving the problems of the technologies described above, the technical scheme that transformer oil temperature on-Line Monitor Device of the present invention adopts is, a kind of transformer oil temperature on-Line Monitor Device comprises thermometric main frame, optical cable, optical fiber Bragg grating temperature sensor and microcomputer, described optical cable connects described optical fiber Bragg grating temperature sensor and thermometric main frame, and described thermometric main frame is connected with microcomputer.

Transformer oil temperature on-Line Monitor Device of the present invention, optical fiber Bragg grating temperature sensor detects temperature of oil in transformer and environment temperature, optical cable is mainly used to transmitting optical signal, the optical data that thermometric main frame mainly comes optical cable transmission is analyzed, and provide actual temp data to microcomputer according to power industry communication protocol standard (CDT stipulations), by optical fiber grating temperature-measuring technological incorporation in transformer oil temperature on-line monitoring, utilize fiber grating demodulation technology, make apparatus of the present invention there is insulativity high, not affected by electromagnetic environment, be applicable to remote, high-quality signal transmission, measuring accuracy advantages of higher.

Brief description of the drawings

Fig. 1 is transformer oil temperature on-Line Monitor Device structural representation of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the present invention is made and being further illustrated.

As shown in the figure, transformer oil temperature on-Line Monitor Device of the present invention comprises thermometric main frame 2, optical cable, optical fiber Bragg grating temperature sensor 3 and microcomputer 1, described optical cable connects described optical fiber Bragg grating temperature sensor and thermometric main frame, and described thermometric main frame is connected with microcomputer.

Optical cable mainly comprises metal hose, waterproof junction box etc., and metal hose is mainly used to protect sensor tail optical fiber.Mainly formed by metal hose and connecting screw.

As preferably, described microcomputer provides RS232 and/or RS485 interface mode.

Transformer oil temperature on-Line Monitor Device of the present invention comprises chromatography online monitoring system for transformer oil, realize the on-line monitoring of temperature of oil in transformer by the on-line monitoring of transformer oil chromatographic simultaneously, can be multi-faceted diagnosis is monitored and made to transformer, for the safe operation of power transformer provides reliable technical guarantee, guarantee the safe operation of transformer.

The present invention's temperature sensor used adopts a kind of optical passive component that is Fiber Bragg Grating FBG; fiber grating (FBG) is a kind of reflection type optical fiber filtering device; in the time that wideband light source passes through; the forward direction guided mode of propagating in optical waveguide can be coupled and form Bragg reflection with retroreflection pattern; use fiber bragg grating center wavelength and temperature to have the characteristic of extraordinary linear relationship, realize temperature survey.

By kind, content and the variation tendency of monitoring oil dissolved gas, and just can analyze the inner latency fault existing of judgment device and can grasp at any time the development of fault the Real-Time Monitoring of oil temperature, realize the repair based on condition of component of transformer, thereby ensure the safe operation of transformer.The environment that is particularly suitable for this high voltage of electric power, high-intensity magnetic field uses, and has therefore fundamentally solved the defect of traditional transformer temperature measuring equipment, for the safe operation of power transformer provides reliable guarantee, guarantees the safe operation of transformer.

Transformer oil temperature on-Line Monitor Device of the present invention, measuring accuracy: ± 1 DEG C (gamut scope); Resolution: 0.1 DEG C; Temperature-measuring range: 0 DEG C~200 DEG C; Measure passage: standard 8 passages.

The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; it should be noted that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (3)

1. a transformer oil temperature on-Line Monitor Device, it is characterized in that: comprise thermometric main frame, optical cable, optical fiber Bragg grating temperature sensor and microcomputer, described optical cable connects described optical fiber Bragg grating temperature sensor and thermometric main frame, and described thermometric main frame is connected with microcomputer.
2. transformer oil temperature on-Line Monitor Device according to claim 1, is characterized in that: described microcomputer provides RS232 and/or RS485 interface mode.
3. according to transformer oil temperature on-Line Monitor Device described in claim 1 or 2, it is characterized in that: comprise chromatography online monitoring system for transformer oil.
CN201310754405.XA 2013-12-31 2013-12-31 Transformer oil temperature online monitoring device CN104034442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310754405.XA CN104034442A (en) 2013-12-31 2013-12-31 Transformer oil temperature online monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310754405.XA CN104034442A (en) 2013-12-31 2013-12-31 Transformer oil temperature online monitoring device

Publications (1)

Publication Number Publication Date
CN104034442A true CN104034442A (en) 2014-09-10

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CN201310754405.XA CN104034442A (en) 2013-12-31 2013-12-31 Transformer oil temperature online monitoring device

Country Status (1)

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CN (1) CN104034442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107044968A (en) * 2017-04-06 2017-08-15 南京航空航天大学 A kind of transformer oil product test device based on Fibre Optical Sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050125174A1 (en) * 2003-12-04 2005-06-09 Seok-Hyun Nam Apparatus and method for analysis of electric power transmission link status having function of real-time evaluating thermal parameters outside the link
CN101949744A (en) * 2010-09-06 2011-01-19 国网电力科学研究院武汉南瑞有限责任公司 Fiber grating-based transformer internal temperature detection system
CN202221693U (en) * 2011-08-22 2012-05-16 三变科技股份有限公司 Fiber temperature measurement transformer
CN202420549U (en) * 2011-12-13 2012-09-05 山东省科学院激光研究所 Transformer multi-parameter fiber on-line monitoring system
CN102768082A (en) * 2012-07-09 2012-11-07 昆明理工大学 Oil immersed power transformer top layer oil temperature monitoring method based on fiber Bragg grating
CN202869691U (en) * 2012-07-09 2013-04-10 昆明理工大学 Adjustable optical fiber Bragg grating sensor for monitoring temperature of top oil of oil-immersed power transformer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050125174A1 (en) * 2003-12-04 2005-06-09 Seok-Hyun Nam Apparatus and method for analysis of electric power transmission link status having function of real-time evaluating thermal parameters outside the link
CN101949744A (en) * 2010-09-06 2011-01-19 国网电力科学研究院武汉南瑞有限责任公司 Fiber grating-based transformer internal temperature detection system
CN202221693U (en) * 2011-08-22 2012-05-16 三变科技股份有限公司 Fiber temperature measurement transformer
CN202420549U (en) * 2011-12-13 2012-09-05 山东省科学院激光研究所 Transformer multi-parameter fiber on-line monitoring system
CN102768082A (en) * 2012-07-09 2012-11-07 昆明理工大学 Oil immersed power transformer top layer oil temperature monitoring method based on fiber Bragg grating
CN202869691U (en) * 2012-07-09 2013-04-10 昆明理工大学 Adjustable optical fiber Bragg grating sensor for monitoring temperature of top oil of oil-immersed power transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107044968A (en) * 2017-04-06 2017-08-15 南京航空航天大学 A kind of transformer oil product test device based on Fibre Optical Sensor

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Application publication date: 20140910

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