CN106052911A - Transformer winding stress monitoring device and monitoring method thereof - Google Patents

Transformer winding stress monitoring device and monitoring method thereof Download PDF

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Publication number
CN106052911A
CN106052911A CN201610416072.3A CN201610416072A CN106052911A CN 106052911 A CN106052911 A CN 106052911A CN 201610416072 A CN201610416072 A CN 201610416072A CN 106052911 A CN106052911 A CN 106052911A
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CN
China
Prior art keywords
optical fiber
stress
signal
transformer winding
grating
Prior art date
Application number
CN201610416072.3A
Other languages
Chinese (zh)
Inventor
王文庆
Original Assignee
东莞市联洲知识产权运营管理有限公司
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.)
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Application filed by 东莞市联洲知识产权运营管理有限公司 filed Critical 东莞市联洲知识产权运营管理有限公司
Priority to CN201610416072.3A priority Critical patent/CN106052911A/en
Publication of CN106052911A publication Critical patent/CN106052911A/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/24Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infra-red, visible light, ultra-violet
    • G01L1/242Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infra-red, visible light, ultra-violet the material being an optical fibre
    • G01L1/246Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infra-red, visible light, ultra-violet the material being an optical fibre using integrated gratings, e.g. Bragg gratings

Abstract

The invention discloses a transformer winding stress monitoring device, which comprises a first fiber, fiber stress sensors, a second fiber, a broadband light source, a wavelength division multiplexing device, a photoelectric detector, a signal amplifier, a signal processor and a display screen. An electromagnetic wire of a transformer winding is internally provided with the first fiber, and the first fiber is provided with the plurality of fiber stress sensors, so that a plurality of points on the transformer winding can be monitored, quick detection and distributed measurement of the transformer winding can be realized, and stress information of the transformer winding at different positions can be accurately known under the function of impact force; through the arrangement of the signal processor and the display screen, real-time analysis and display of quick impact force of the winding can be realized; and each fiber stress sensor is internally provided with a first grating and a second grating to obtain overall information of stress and temperature and temperature information respectively, and thus the problem of temperature cross-sensitivity when carrying out stress monitoring on the transformer winding is solved.

Description

A kind of Transformer Winding monitor for stress and monitoring method thereof

Technical field:

The invention belongs to transformer monitoring technical field in power system, be specifically related to a kind of Transformer Winding stress prison Survey device and monitoring method thereof.

Background technology:

Power transformer is the important component part in power system.Operating Transformer Winding can set up about Axial and radial leakage magnetic flux, when being short-circuited fault or during by lightning current percussion, the big electric current that winding flows through will Electromagnetic force suffered by winding is caused to increase severely.Winding is hit after power effect, will result in change in size axial, radial, winding distortion, drum The situations such as bag, i.e. winding deformation.Winding deformation is likely to result in insulation distance and changes or insulating paper generation breakage, when running into thunder During electricity overvoltage, transformator will puncture between generation turn-to-turn, cake, sudden damage accident occur.Therefore to Transformer Winding stress It is monitored, has important effect to preventing Accident of Transformer.

The method that the most axial and radial stress of Winding in Power Transformer mainly uses Theoretical Calculation, but by In relevant parameter calculating errors such as transformer device structure complexity, electric current densities, and winding is rushing as its leakage magnetic flux of elastic system Hitting under power effect is coupled field, and the calculated results and actual winding stress situation still have bigger gap, it is impossible to for transformator around The judgement of group deformation provides and supports.Simultaneously because on winding, produce electrodynamic Intruding wave, short circuit current has the highest frequency Rate, signal cannot be demodulated by existing demodulating equipment, causes and analyzes the difficulty that end cannot be Tong Bu with test side.

Summary of the invention:

For solving the problems referred to above, the present invention proposes a kind of Transformer Winding monitor for stress and monitoring method thereof.

For reaching above-mentioned purpose, technical scheme is as follows:

A kind of Transformer Winding monitor for stress, including:

First optical fiber, described first optical fiber is arranged on inside the electromagnetic wire of Transformer Winding, and described first optical fiber is by solid Determine device to be fixed on inside the electromagnetic wire of described Transformer Winding.

Optical fiber stress sensor, multiple described optical fiber stress sensors are distributed to be arranged on described first optical fiber.

Second optical fiber, described second optical fiber is arranged on outside the electromagnetic wire of described Transformer Winding, and described second optical fiber leads to Cross fibre-optical splice to be connected with described first optical fiber.

Wideband light source, the broadband light sent is entered into the fiber grating of described optical fiber stress sensor by described wideband light source In FBG array.

WDM, described WDM is arranged in Surveillance center, and described WDM is with described Second optical fiber connects.

Photodetector, described photodetector is arranged in Surveillance center, and described photodetector is multiple with described wavelength-division Connect with equipment.

Signal amplifier, described signal amplifier is arranged in Surveillance center, described signal amplifier and described smooth electrical resistivity survey Survey device connects.

Signal processor, described signal amplifier is arranged in Surveillance center, and described signal processor is put with described signal Big device connects.

Display screen, described display screen is arranged in Surveillance center, and described display screen is connected with described signal processor.

Preferred as technique scheme, the fiber grating FBG of described optical fiber stress sensor include the first grating and Second grating, described first grating is pasted onto on base, and described second grating is unsettled above base.

Preferred as technique scheme, the centre wavelength of the centre wavelength of described first grating and described second grating Difference .nm.

Preferred as technique scheme, described first optical fiber and described second optical fiber are single-mode fiber.

Preferred as technique scheme, the two ends of described fibre-optical splice are provided with protective layer.

The stress monitoring method of a kind of Transformer Winding monitor for stress, comprises the steps:

The broadband light sent is entered in the fiber grating FBG array of optical fiber stress sensor by S1: wideband light source.

S2: wavelength-division multiplex based on FGB itself, after optical fiber stress sensor is stressed impact, wavelength becomes Change, obtained about temperature and the first optical signal of stress by the first grating, obtained about the second of temperature by the second grating Optical signal, the second optical signal of the first optical signal sum of multiple optical fiber stress sensors returns in WDM.

S3: WDM receives the second optical signal of the first optical signal sum of multiple optical fiber stress sensors and carries out Separate.

The optical signal separated in WDM is converted to the signal of telecommunication and is sent to signal amplification by S4: photodetector Device.

The signal of telecommunication in photodetector is carried out signal and is amplified and sent to signal processor by S5: signal amplifier.

The signal of telecommunication that signal amplifier amplifies is processed by S6: signal processor, obtain Transformer Winding stress and Temperature information is also sent to display screen.

S7: the stress of display screen receiving transformer winding and temperature information also show.

The beneficial effects of the present invention is: it is by arranging the first optical fiber inside the electromagnetic wire of Transformer Winding, first Multiple optical fiber stress sensor is set on optical fiber, the multiple points in Transformer Winding can be monitored, it is achieved that to transformation The quickly detection of device winding and the function of distributed measurement, accurately grasp Transformer Winding diverse location under the effect of impulsive force Stress situation;It is by arranging signal processor and display screen, it is possible to achieve analyze winding quick washing power in real time And display;It is by arranging the first grating and the second grating obtains the whole of stress and temperature respectively in optical fiber stress sensor Body information and temperature information, solve the Temperature cross-over tender subject when to Transformer Winding stress monitoring.This device is sensitive Degree height, resolution is high, it is possible to measure the Transformer Winding STRESS VARIATION of short-circuit impact moment.

Accompanying drawing illustrates:

The following drawings is only intended to, in schematically illustrating the present invention and explaining, not delimit the scope of the invention.Wherein:

Fig. 1 is the Transformer Winding monitor for stress structural representation of one embodiment of the invention;

Fig. 2 is the optical fiber stress sensor structural representation of one embodiment of the invention;

Fig. 3 is the stress monitoring method flow chart of the Transformer Winding monitor for stress of one embodiment of the invention.

Symbol description in figure:

1-the first optical fiber, 2-Transformer Winding, 3-fixing device, 4-optical fiber stress sensor, 5-the second optical fiber, 6-optical fiber Joint, 7-wideband light source, 8-WDM, 9-photodetector, 10-signal amplifier, 11-signal processor, 12-shows Display screen, 13-Surveillance center, 401-the first grating, 402-the second grating, 403-base.

Detailed description of the invention:

As it is shown in figure 1, the Transformer Winding monitor for stress of the present invention, including:

First optical fiber 1, described first optical fiber 1 is arranged on inside the electromagnetic wire of Transformer Winding 2, and described first optical fiber 1 leads to Cross fixing device 3 to be fixed on inside the electromagnetic wire of described Transformer Winding 2.

Optical fiber stress sensor 4, multiple described optical fiber stress sensors 4 are distributed to be arranged on described first optical fiber 1.As Shown in Fig. 2, the fiber grating FBG of described optical fiber stress sensor 4 includes the first grating 401 and the second grating 402, described first Grating 401 is pasted onto on base 403, and described second grating 402 is unsettled above base 403.In the present embodiment, described first light The centre wavelength of grid 401 differs 0.5nm with the centre wavelength of described second grating 402.

Second optical fiber 5, described second optical fiber 5 is arranged on outside the electromagnetic wire of described Transformer Winding 2, described second optical fiber 5 are connected with described first optical fiber 1 by fibre-optical splice 6.In the present embodiment, described first optical fiber 1 and described second optical fiber 5 are Single-mode fiber, uses single-mode fiber conduction distance, and signal is more preferable.The two ends of described fibre-optical splice 6 are provided with protective layer.

Wideband light source 7, the broadband light sent is entered into the optical fiber of described optical fiber stress sensor 4 by described wideband light source 7 In grating FBG array.

WDM 8, described WDM 8 is arranged in Surveillance center 13, described WDM 8 with Described second optical fiber 5 connects.

Photodetector 9, described photodetector 9 is arranged in Surveillance center 13, described photodetector 9 and described ripple Multiplexing equipment 8 is divided to connect.

Signal amplifier 10, described signal amplifier 10 is arranged in Surveillance center 13, described signal amplifier 10 and institute State photodetector 9 to connect.

Signal processor 11, described signal amplifier 11 is arranged in Surveillance center 13, described signal processor 11 and institute State signal amplifier 10 to connect.

Display screen 12, described display screen 12 is arranged in Surveillance center 13, described display screen 12 and described signal processor 11 connect.

The stress monitoring method of the Transformer Winding monitor for stress in the present embodiment is as it is shown on figure 3, include walking as follows Rapid:

The broadband light sent is entered in the fiber grating FBG array of optical fiber stress sensor 4 by S1: wideband light source 7.

S2: wavelength-division multiplex based on FGB itself, after optical fiber stress sensor 4 is stressed impact, wavelength becomes Change, obtain the first optical signal about temperature and stress by the first grating 401, obtained about temperature by the second grating 402 The second optical signal, the second optical signal of the first optical signal sum of multiple optical fiber stress sensors 4 returns to WDM 8 In.

Second optical signal of the first optical signal sum that S3: WDM 8 receives multiple optical fiber stress sensor 4 is gone forward side by side Row separates.

The optical signal separated in WDM 8 is converted to the signal of telecommunication and is sent to signal and puts by S4: photodetector 9 Big device 10.

The signal of telecommunication in photodetector 9 is carried out signal and is amplified and sent to signal processor by S5: signal amplifier 10 11。

The signal of telecommunication that signal amplifier 10 amplifies is processed by S6: signal processor 11, obtains answering of Transformer Winding Power and temperature information are also sent to display screen 12.

The stress of S7: display screen 12 receiving transformer winding 2 and temperature information also show.

A kind of Transformer Winding monitor for stress described in the present embodiment, including: the first optical fiber, fiber stress sense Device, the second optical fiber, wideband light source, WDM, photodetector, signal amplifier, signal processor, display screen.Its By arranging the first optical fiber inside the electromagnetic wire of Transformer Winding, the first optical fiber arranges multiple optical fiber stress sensor, can So that the multiple points in Transformer Winding are monitored, it is achieved that quickly detection and the merit of distributed measurement to Transformer Winding Can, under the effect of impulsive force, accurately grasp the stress situation of Transformer Winding diverse location;It is by arranging signal processor And display screen, it is possible to achieve winding quick washing power is analyzed in real time and shown;It is by optical fiber stress sensor First grating is set and the second grating obtains stress and the Global Information of temperature and temperature information respectively, solve to transformation Temperature cross-over tender subject during device winding stress monitoring.This device sensitivity is high, and resolution is high, it is possible to measure short-circuit impact wink Between Transformer Winding STRESS VARIATION.

Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or Change among still in the protection domain of the invention.

Claims (6)

1. a Transformer Winding monitor for stress, it is characterised in that including:
First optical fiber (1), described first optical fiber (1) is arranged on inside the electromagnetic wire of Transformer Winding (2), described first optical fiber (1) it is fixed on inside the electromagnetic wire of described Transformer Winding (2) by fixing device (3);
Optical fiber stress sensor (4), multiple described optical fiber stress sensors (4) are distributed to be arranged on described first optical fiber (1);
Second optical fiber (5), described second optical fiber (5) is arranged on outside the electromagnetic wire of described Transformer Winding (2), described second light Fine (5) are connected with described first optical fiber (1) by fibre-optical splice (6);
Wideband light source (7), the broadband light sent is entered into the light of described optical fiber stress sensor (4) by described wideband light source (7) In fine grating FBG array;
WDM (8), described WDM (8) is arranged in Surveillance center (13), described WDM (8) it is connected with described second optical fiber (5);
Photodetector (9), described photodetector (9) is arranged in Surveillance center (13), described photodetector (9) and institute State WDM (8) to connect;
Signal amplifier (10), described signal amplifier (10) is arranged in Surveillance center (13), described signal amplifier (10) It is connected with described photodetector (9);
Signal processor (11), described signal amplifier (11) is arranged in Surveillance center (13), described signal processor (11) It is connected with described signal amplifier (10);
Display screen (12), described display screen (12) is arranged in Surveillance center (13), at described display screen (12) and described signal Reason device (11) connects.
Transformer Winding monitor for stress the most according to claim 1, it is characterised in that: described optical fiber stress sensor (4) fiber grating FBG includes that the first grating (401) and the second grating (402), described first grating (401) are pasted onto base (403), on, described second grating (402) is unsettled in base (403) top.
Transformer Winding monitor for stress the most according to claim 2, it is characterised in that: described first grating (401) Centre wavelength differ 0.5nm with the centre wavelength of described second grating (402).
Transformer Winding monitor for stress the most according to claim 1, it is characterised in that: described first optical fiber (1) and Described second optical fiber (5) is single-mode fiber.
Transformer Winding monitor for stress the most according to claim 1, it is characterised in that: described fibre-optical splice (6) Two ends are provided with protective layer.
6. the stress monitoring method of a Transformer Winding monitor for stress, it is characterised in that comprise the steps:
The broadband light sent is entered in the fiber grating FBG array of optical fiber stress sensor (4) by S1: wideband light source (7);
S2: wavelength-division multiplex based on FGB itself, after optical fiber stress sensor (4) is stressed impact, wavelength becomes Change, obtained about temperature and the first optical signal of stress by the first grating (401), by the second grating (402) obtain about Second optical signal of temperature, it is multiple that the second optical signal of the first optical signal sum of multiple optical fiber stress sensors (4) returns to wavelength-division With in equipment (8);
Second optical signal of the first optical signal sum that S3: WDM (8) receives multiple optical fiber stress sensor (4) is gone forward side by side Row separates;
The optical signal separated in WDM (8) is converted to the signal of telecommunication and is sent to signal and puts by S4: photodetector (9) Big device (10);
The signal of telecommunication in photodetector (9) is carried out signal and is amplified and sent to signal processor by S5: signal amplifier (10) (11);
The signal of telecommunication that signal amplifier (10) amplifies is processed by S6: signal processor (11), obtains answering of Transformer Winding Power and temperature information are also sent to display screen (12);
The stress of S7: display screen (12) receiving transformer winding (2) and temperature information also show.
CN201610416072.3A 2016-06-14 2016-06-14 Transformer winding stress monitoring device and monitoring method thereof CN106052911A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106646097A (en) * 2016-11-28 2017-05-10 华北电力大学 Transformer winding deformation on-line monitoring system by employing fiber grating strain sensors

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JPS61283850A (en) * 1985-06-10 1986-12-13 Hitachi Cable Ltd Fault section locator for power transmission line
US5283429A (en) * 1992-09-10 1994-02-01 Leviton Manufacturing Co., Inc. Fiber optical monitoring system for eletrical conductors and the like
CN101545817A (en) * 2009-04-30 2009-09-30 山东省科学院激光研究所 Fiber grating osmotic pressure sensor with low measuring range
CN102680582A (en) * 2012-06-07 2012-09-19 北京航空航天大学 Matching fiber grating acoustic emission sensing system with temperature compensation function
CN103389176A (en) * 2013-07-25 2013-11-13 国家电网公司 Device and method for measuring radial stress of transformer winding
CN104931081A (en) * 2015-06-10 2015-09-23 天津大学 Composite wavelength reference-based fiber bragg grating sensing demodulation device and method
CN104964737A (en) * 2015-07-20 2015-10-07 广东电网有限责任公司电力科学研究院 Device for measuring transformer winding vibration caused by transformer intruding wave
CN105973511A (en) * 2016-04-28 2016-09-28 华北电力大学 Distributed optical fiber-based transformer winding stress monitoring system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61283850A (en) * 1985-06-10 1986-12-13 Hitachi Cable Ltd Fault section locator for power transmission line
US5283429A (en) * 1992-09-10 1994-02-01 Leviton Manufacturing Co., Inc. Fiber optical monitoring system for eletrical conductors and the like
CN101545817A (en) * 2009-04-30 2009-09-30 山东省科学院激光研究所 Fiber grating osmotic pressure sensor with low measuring range
CN102680582A (en) * 2012-06-07 2012-09-19 北京航空航天大学 Matching fiber grating acoustic emission sensing system with temperature compensation function
CN103389176A (en) * 2013-07-25 2013-11-13 国家电网公司 Device and method for measuring radial stress of transformer winding
CN104931081A (en) * 2015-06-10 2015-09-23 天津大学 Composite wavelength reference-based fiber bragg grating sensing demodulation device and method
CN104964737A (en) * 2015-07-20 2015-10-07 广东电网有限责任公司电力科学研究院 Device for measuring transformer winding vibration caused by transformer intruding wave
CN105973511A (en) * 2016-04-28 2016-09-28 华北电力大学 Distributed optical fiber-based transformer winding stress monitoring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106646097A (en) * 2016-11-28 2017-05-10 华北电力大学 Transformer winding deformation on-line monitoring system by employing fiber grating strain sensors
CN106646097B (en) * 2016-11-28 2019-07-02 华北电力大学 Using the deformation of transformer winding on-line monitoring system of fiber Bragg grating strain sensor

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Application publication date: 20161026