CN103389176B - A kind of Transformer Winding width is to stress measurement device and measuring method - Google Patents

A kind of Transformer Winding width is to stress measurement device and measuring method Download PDF

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CN103389176B
CN103389176B CN201310317143.0A CN201310317143A CN103389176B CN 103389176 B CN103389176 B CN 103389176B CN 201310317143 A CN201310317143 A CN 201310317143A CN 103389176 B CN103389176 B CN 103389176B
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fiber
glass fiber
bragg grating
tape
transformer
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CN201310317143.0A
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CN103389176A (en
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安彦斌
武国亮
聂德鑫
卢文华
方超
张海龙
向冬冬
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国家电网公司
山西省电力公司
国网电力科学研究院武汉南瑞有限责任公司
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Abstract

The invention discloses a kind of Transformer Winding width to stress measurement device and measuring method, it comprises the first fibre-optical splice, be pasted onto the first glass fiber tape on transformer coli winding surface insulation paper, be fixed on the first fiber Bragg grating strain sensor on the first glass fiber tape, the first fiber coupler that input end is connected with the output terminal of the first fiber Bragg grating strain sensor, the first inner connecting fiber that one end is connected with the first fiber coupler output terminal, the the first outside connecting fiber be connected with the other end of the first inner connecting fiber, the fiber Bragg grating (FBG) demodulator be connected with the first outside connecting fiber, the computing machine be connected with fiber Bragg grating (FBG) demodulator, wherein, first inner connecting fiber is connected with the first outside connecting fiber by the first fibre-optical splice.The present invention be transformer anti-short circuit capability research, deformation of transformer winding diagnosis provide accurately and effectively winding width to stress database.

Description

A kind of Transformer Winding width is to stress measurement device and measuring method

Technical field

The present invention relates to Transformer's Condition Monitoring technical field, refer to that a kind of Transformer Winding width is to stress measurement device and measuring method particularly.

Background technology

Large-scale power transformer is one of visual plant in electric system, has an accident, likely causes large-area power-cuts in region, bring huge economic loss by society, and bring bad social influence to power department if be in operation.

After Transformer Winding current-carrying, axial and radial stray field will be set up in the space at their places and surrounding space; The winding itself be in this magnetic field is subject to acting force again, and this power is called " Lorentz force " or is referred to as electromagnetic force.Electromagnetic force produces mechanical stress in Transformer Winding material, and partly passes on other element of transformer.When normally running, electromagnetic force is also little, but when being short-circuited, the short-circuit electromagnetic force that winding is subject to will increase severely, and reach tens times of normal value, even hundred times.

And power transformer inevitably suffers the impact of various failed shorted electric current in operational process, once short trouble occurs near transformer outlet, if there is weak link in winding internal mechanical structure, the metabolies such as winding distortion, bulge or displacement will inevitably be produced, time serious, even cause sudden damage accident.Therefore, carry out Transformer Winding short-circuit electromotive force and winding stress, deformation test research, have important effect to what prevent Accident of Transformer.

Domestic when suffering short-circuit current rush for transformer at present, axis of winding and width are all the methods adopting theory calculate to the research of stress, but because inside transformer complicated in mechanical structure, the correlation parameter such as current density, stray field calculates and still has gap with actual, and there is synergistic effect in Transformer Winding short-circuit impact, correlation computations is difficult to the stress state truly grasping Transformer Winding, cannot judge to provide support for the research of transformer short-circuit distortion.

Summary of the invention

Object of the present invention will provide a kind of Transformer Winding width to stress measurement device and measuring method exactly, this measurement mechanism and measuring method can measure the winding width of winding when normally running and suffer short-circuit current rush to stress, for the research of transformer anti-short circuit capability, deformation of transformer winding diagnosis provides effective winding width to stress measurement.

For realizing this object, Transformer Winding width designed by the present invention is to stress measurement device, it is characterized in that: it comprises the first fibre-optical splice, be pasted onto the first glass fiber tape on transformer coli winding surface insulation paper, be fixed on the first fiber Bragg grating strain sensor on the first glass fiber tape, the first fiber coupler that input end is connected with the output terminal of the first fiber Bragg grating strain sensor, the first inner connecting fiber that one end is connected with the first fiber coupler output terminal, the the first outside connecting fiber be connected with the other end of the first inner connecting fiber, the fiber Bragg grating (FBG) demodulator be connected with the first outside connecting fiber, the computing machine be connected with fiber Bragg grating (FBG) demodulator, wherein, described first inner connecting fiber is connected with the first outside connecting fiber by the first fibre-optical splice.

Utilize above-mentioned Transformer Winding width to a method for measuring stress for stress measurement device, it comprises the steps:

Step 1: the width that the corresponding measurement point of described transformer coli winding surface insulation paper produces in real time is to strain, linearly characterized by the strain of the first glass fiber tape, first fiber Bragg grating strain sensor responds to the strain signal of the first glass fiber tape, and obtains corresponding photoinduction signal;

Step 2: the photoinduction signal obtained is sent to the first fiber coupler and carries out signal amplification by described first fiber Bragg grating strain sensor;

Step 3: the photoinduction signal after amplification is transferred to fiber Bragg grating (FBG) demodulator by the first inner connecting fiber and the first outside connecting fiber by the first fiber coupler, and the photoinduction signal receiving received becomes width to electrostrictive strain signal by fiber Bragg grating (FBG) demodulator;

Step 4: described fiber Bragg grating (FBG) demodulator by width to electrostrictive strain Signal transmissions to computing machine, computing machine is through calculating corresponding width to stress signal.

In the present invention, the strain of Transformer Winding is linearly characterized by the strain of above-mentioned glass fiber tape, and respond to this linear strain signal by fiber Bragg grating strain sensor, this linear strain signal is transferred to computing machine after the process such as follow-up amplification, demodulation, and obtaining needs the winding width measured to stress.The present invention solves the winding width of Transformer Winding when normally running and suffer short-circuit current rush to stress measurement problem by above-mentioned design, for transformer anti-short circuit capability research, deformation of transformer winding diagnosis provide accurately and effectively winding width to stress database.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Wherein, 1-transformer coli winding surface insulation paper, 2-the first glass fiber tape, 2.1-the second glass fiber tape, 2.2-the three glass fiber tape, 3-the first fiber Bragg grating strain sensor, 3.1-the second fiber Bragg grating strain sensor, 3.2-the three fiber Bragg grating strain sensor, 4-the first fiber coupler, 4.1-the second fiber coupler, 4.2-the three fiber coupler, 5-the first inner connecting fiber, 5.1-the second inner connecting fiber, 5.2-the three inner connecting fiber, 6-the first outside connecting fiber, 6.1-the second outside connecting fiber, 6.2-the three outside connecting fiber, 7-fiber Bragg grating (FBG) demodulator, 8-computing machine, 9-optical fiber flange, 9.1-first method flange aperture, 9.2-the second flange hole, 9.3-the three-flange hole, 10-the first fibre-optical splice, 10.1-the second fibre-optical splice, 10.2-the three fibre-optical splice, 11-transformer-cabinet, 11.1-the first through hole, 11.2-the second through hole, 11.3-third through-hole.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:

When Transformer Winding is by alternating current, Transformer Winding can produce width to stress, thus make Transformer Winding produce width to strain, by detect Transformer Winding width to strain reach the object of measuring transformer winding stress.Specifically, be wound around a glass fiber tape at Transformer Winding skin, like this, the strain of Transformer Winding linearly can be characterized by the strain of this glass fiber tape.Installing optical fibres grating strain transducer on glass fiber tape, measures the deformation of glass fiber tape by fiber Bragg grating strain sensor, then reconcile instrument by fiber grating and carry out resolving and the strain of computation and measurement to signal, finally strain is converted to the stress of winding.

The Transformer Winding width of the present invention's design is to stress measurement device, as shown in Figure 1, it comprises the first fibre-optical splice 10, be pasted onto the first glass fiber tape 2 on transformer coli winding surface insulation paper 1, be fixed on the first fiber Bragg grating strain sensor 3 on the first glass fiber tape 2, the first fiber coupler 4 that input end is connected with the output terminal of the first fiber Bragg grating strain sensor 3, the first inner connecting fiber 5 that one end is connected with the first fiber coupler 4 output terminal, the the first outside connecting fiber 6 be connected with the other end of the first inner connecting fiber 5, the fiber Bragg grating (FBG) demodulator 7 be connected with the first outside connecting fiber 6, the computing machine 8 be connected with fiber Bragg grating (FBG) demodulator 7, wherein, first inner connecting fiber 5 is connected with the first outside connecting fiber 6 by the first fibre-optical splice 10.

In technique scheme, it also comprises the second fibre-optical splice 10.1, be pasted onto the second glass fiber tape 2.1 on transformer coli winding surface insulation paper 1, be fixed on the second fiber Bragg grating strain sensor 3.1 on the second glass fiber tape 2.1, the second fiber coupler 4.1 that input end is connected with the output terminal of the second fiber Bragg grating strain sensor 3.1, the second inner connecting fiber 5.1 that one end is connected with the second fiber coupler 4.1 output terminal, the the second outside connecting fiber 6.1 be connected with the other end of the second inner connecting fiber 5.1, wherein, second inner connecting fiber 5.1 connects the second outside connecting fiber 6.1 by the second fibre-optical splice 10.1, described second outside connecting fiber 6.1 incoming fiber optic grating demodulation instrument 7, first glass fiber tape 2 is positioned at the middle part of transformer coli winding surface insulation paper 1, second glass fiber tape 2.1 is positioned at the top of the first glass fiber tape 2.

In technique scheme, preferably, it can also comprise the 3rd fibre-optical splice 10.2, be pasted onto the 3rd glass fiber tape 2.2 on transformer coli winding surface insulation paper 1, be fixed on the 3rd fiber Bragg grating strain sensor 3.2 on the 3rd glass fiber tape 2.2, the 3rd fiber coupler 4.2 that input end is connected with the output terminal of the 3rd fiber Bragg grating strain sensor 3.2, the 3rd inner connecting fiber 5.2 that one end is connected with the 3rd fiber coupler 4.2 output terminal, the 3rd outside connecting fiber 6.2 be connected with the other end of the 3rd inner connecting fiber 5.2, wherein, 3rd inner connecting fiber 5.2 connects the 3rd outside connecting fiber 6.2 by the 3rd fibre-optical splice 10.2, 3rd outside connecting fiber 6.2 incoming fiber optic grating demodulation instrument 7, 3rd glass fiber tape 2.2 is positioned at the below of the first glass fiber tape 2.Lay in the upper below of transformer coli winding the stress situation that glass fiber tape can react transformer coli winding more accurately in above-mentioned design.

In technique scheme, preferably, it also comprises the optical fiber flange 9 be fixed on transformer-cabinet 11, transformer-cabinet 11 offers the first through hole 11.1, second through hole 11.2 and third through-hole 11.3, described optical fiber flange 9 offers the first method flange aperture 9.1 corresponding with the first through hole 11.1, second flange hole 9.2 corresponding with the second through hole 11.2, the three-flange hole 9.3 corresponding with third through-hole 11.3, wherein, first fibre-optical splice 10 is assemblied in the first through hole 11.1 and first method flange aperture 9.1, second fibre-optical splice 10.1 is assemblied in the second through hole 11.2 and the second flange hole 9.2, 3rd fibre-optical splice 10.2 is assemblied in third through-hole 11.3 and three-flange hole 9.3.

In technique scheme, preferably, the first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 are arranged in parallel.In order to the stress of better measuring transformer coil winding, the stickup direction of glass fiber tape should be identical with winding, so above-mentioned first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 are for being arranged in parallel.

In technique scheme, preferably, the two ends of the first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 all with the justify align of transformer coli winding surface insulation paper 1, the width range of the first glass fiber tape 2 is 18 ~ 20mm, the width range of the second glass fiber tape 2.1 is 18 ~ 20mm, and the width range of the 3rd glass fiber tape 2.2 is 18 ~ 20mm.

In technique scheme, preferably, the thickness of the first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 is equal, and thickness range is 1.25 ~ 1.30mm.The stress of transformer coli winding linearly can better be characterized at above-mentioned thickness lower-glass fabric strip.

In technique scheme, preferably, the tensile strength of the first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 is 11120N, and elastic modulus is 71.5GPa.This first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 are E-glass fibre and alkali-free glass, and this E glass fibre has the performances such as insulation, heat-resisting, transformer oil resistant.

In technique scheme, the first glass fiber tape 2, second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 all adopt glass adhesive tape to join and are gluingly connected on transformer coli winding surface insulation paper 1 relevant position.

In technique scheme, first fiber Bragg grating strain sensor 3, second fiber Bragg grating strain sensor 3.1 and the 3rd fiber Bragg grating strain sensor 3.2 all adopt the nonmetal strain transducer of Micron Optics grating surface formula (model OS3200), Bragg grating (FBG) stress sensing technology, measure wave band 1300nm, strain sensitive degree 1.2pm/ μ ε, strain limit 2500 μm/m, measuring tempeature scope-20 DEG C ~ 80 DEG C, the long 25mm of size, wide 6mm, thick 1mm, tail optical fiber length 2m, adopt surface-mount type, utilize tackifier that fiber Bragg grating strain sensor is affixed on glass fibre belt surface.

In technique scheme, the inner connecting fiber 5.1 of the first inner connecting fiber 5, second, the outside connecting fiber 6.1 of the 3rd inner connecting fiber the 5.2, first outside connecting fiber 6, second, the 3rd outside connecting fiber 6.2 are single-mode fiber.It is that signal is better because single-mode fiber conduction distance that the present invention selects single-mode fiber to carry out signal transmission.

In technique scheme, fiber Bragg grating (FBG) demodulator 7 is 1300nm wave band, has 16 passages, the centre wavelength drift value of basis signal can calculate strain, simultaneously Tc impact.

Utilize above-mentioned Transformer Winding width to a method for measuring stress for stress measurement device, it comprises the steps:

Step 1: the width that the corresponding measurement point of transformer coli winding surface insulation paper 1 produces in real time is to strain, linearly characterized by the strain of the first glass fiber tape 2, first fiber Bragg grating strain sensor 3 responds to the strain signal of the first glass fiber tape 2, and obtains corresponding photoinduction signal;

Step 2: the photoinduction signal obtained is sent to the first fiber coupler 4 and carries out signal amplification by the first fiber Bragg grating strain sensor 3;

Step 3: the photoinduction signal after amplification is transferred to fiber Bragg grating (FBG) demodulator 7 by the first inner connecting fiber 5 and the first outside connecting fiber 6 by the first fiber coupler 4, and the photoinduction signal receiving received becomes width to electrostrictive strain signal by fiber Bragg grating (FBG) demodulator 7;

Step 4: fiber Bragg grating (FBG) demodulator 7 by width to electrostrictive strain Signal transmissions to computing machine 8, computing machine 8 is through calculating corresponding width to stress signal.

The step 1 of technique scheme also carry out step 1.1 while carrying out: the width that the corresponding measurement point of described transformer coli winding surface insulation paper 1 produces in real time is to strain, linearly characterized by the strain of the second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 respectively, second fiber Bragg grating strain sensor 3.1 and the 3rd fiber Bragg grating strain sensor 3.2 respond to the strain signal of the second glass fiber tape 2.1 and the 3rd glass fiber tape 2.2 respectively, and obtain corresponding photoinduction signal;

Described step 2 also carry out step 2.1 while carrying out: described second fiber Bragg grating strain sensor 3.1 and the 3rd fiber Bragg grating strain sensor 3.2 respectively the photoinduction signal obtained are sent to the second fiber coupler 4.1 and the 3rd fiber coupler 4.2 carries out signal amplification;

Described step 3 also carry out step 3.1 while carrying out: the second fiber coupler 4.1 and the 3rd fiber coupler 4.2 are by the photoinduction Signal transmissions after amplification to fiber Bragg grating (FBG) demodulator 7, and the photoinduction signal receiving received becomes width to electrostrictive strain signal by fiber Bragg grating (FBG) demodulator 7.

Below principle of work of the present invention is elaborated:

After transformer coli winding current-carrying, their places space and around will set up axial and radial stray field; The winding itself be in this magnetic field is subject to acting force again, and this power is called " Lorentz force " or is referred to as electromagnetic force.Electromagnetic force produces mechanical stress in the material of transformer coli winding, and because the direction of current of exterior loop is contrary with the direction of current of interior loop, two coils will have the trend of distortion at the short circuit width of burst under the effect of power.Exterior loop is subject to tensile force at circumferencial direction, and have the trend of spread loop diameter, interior loop is compressed power at circumferencial direction, the trend of the oriented direction unshakable in one's determination compression of coil.

In order to measure this width of winding to stress, the fiber Bragg grating strain sensor that the present invention adopts has the following advantages: 1) optical fiber is insulator, and high pressure resistant, corrosion-resistant, can reliability service under the hyperbaric environment near transformer coli winding; 2) optical fiber is passive device, does not have an impact to Transformer Winding own electric field; 3) optical fiber volume is little, lightweight, can install in transformer coli winding; 4) carrier of fiber Bragg grating strain sensor is light, and its frequency number magnitude is 1014Hz, thus makes sensor frequency band range very wide, and dynamic range is very large, not by the inside transformer interference of electromagnetic field; 5) there is good sensitivity and resolution, the transformer coli winding strain variation of short-circuit impact moment can be measured.

Fiber Bragg grating strain sensor measuring transformer coil winding width is the installation question solving fiber Bragg grating strain sensor to the core of stress.Due to the singularity that strong electromagnetic environment and the inherently safe performance of transformer coli winding require, welding or screw fastening method cannot be adopted to install, gluing can only be taked to install.But because transformer coli winding conductive line surfaces exists insulating paper parcel, directly paste fiber Bragg grating strain sensor on transformer coli winding surface and there is following problem: 1) tested surface is paper structure, strain is difficult to the real STRESS VARIATION of reflection winding.2) directly paste strain transducer on winding surface, winding insulation paper can be destroyed, reduce winding insulation performance, cause transformer fault.3) under short-circuit electromotive force impacts, mounting structure has the possibility of loose or dislocation.Therefore, present invention employs one and indirectly paste installation method.

E-glass fiber tape has good electric insulating quality and mechanical property, is usually used on the technology for binding of transformer core, meets the performance requirements such as insulation, heat-resisting, transformer oil resistant.Meanwhile, glass fiber tape elasticity coefficient is high, and rigidity is good, and its elastic modulus is 71.5GPa, and a little less than metal alloy, higher than organic fiber, in elastic limit, elongation is large and pulling strengrth is high.Adopt this kind of material can either meet the requirements such as inside transformer insulation, heat-resisting, transformer oil resistant, also meet the performance requirement of strain measurement substrate simultaneously, the relation of strain and stress can be reacted preferably.Winding is wound around three glass fiber tapes, and adopting glass adhesive tape to join glue, to carry out pretension bonding.Technique for sticking during bonding employing colligation unshakable in one's determination, performance requirement according to the invention.Adopt glass fiber tape to be wound around winding, the width of winding can directly be reflected in the stretching change of glass fiber tape to stress.Now installing optical fibres grating strain transducer on glass fiber tape, the strain of measurement just can react the change of winding stress really.Meanwhile, fiber Bragg grating strain sensor with around interblock space layer of glass band, on Transformer Winding insulating property impact little, be bonded on the glass fiber tape close to rigid body, installation strength is also secure.For Measurement accuracy winding stress, the present invention respectively arranges a glass fiber tape in winding upper, middle and lower part, often with installing optical fibres grating strain transducer on glass fiber tape, just can measure the STRESS VARIATION at position, place, winding upper, middle and lower three.

Glass fiber tape of the present invention and fiber Bragg grating strain sensor thickness are about 1mm, and material insulation property is good, on the stay of transformer coli winding and insulating paper cylinder is installed and insulating property impact is less.Fiber Bragg grating strain sensor tail optical fiber can along stay fixed and arranged, then by winding cabling in the raised floor.Then be connected by coupling mechanism with inner connecting fiber by tail optical fiber, internal optical fiber along folder and fuel tank fixed and arranged, then can be drawn by end optical fiber flange plate.And be connected to fiber Bragg grating (FBG) demodulator by outside connecting fiber, calculate strain by measuring center wavelength shift, Tc impact simultaneously.By the computing machine connected, analyzing and processing is carried out to measurement data again, calculate the width of winding to stress by the elastic modulus of associated materials.

The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.

Claims (7)

1. a Transformer Winding width is to the method for measuring stress of stress measurement device, described Transformer Winding width comprises the first fibre-optical splice (10) to stress measurement device, be pasted onto the first glass fiber tape (2) on transformer coli winding surface insulation paper (1), be fixed on the first fiber Bragg grating strain sensor (3) on the first glass fiber tape (2), the first fiber coupler (4) that input end is connected with the output terminal of the first fiber Bragg grating strain sensor (3), the first inner connecting fiber (5) that one end is connected with the first fiber coupler (4) output terminal, the the first outside connecting fiber (6) be connected with the other end of the first inner connecting fiber (5), the fiber Bragg grating (FBG) demodulator (7) be connected with the first outside connecting fiber (6) and the computing machine (8) be connected with fiber Bragg grating (FBG) demodulator (7), wherein, described first inner connecting fiber (5) is connected with the first outside connecting fiber (6) by the first fibre-optical splice (10),
Transformer Winding width also comprises the second fibre-optical splice (10.1) to stress measurement device, be pasted onto the second glass fiber tape (2.1) on transformer coli winding surface insulation paper (1), be fixed on the second fiber Bragg grating strain sensor (3.1) on the second glass fiber tape (2.1), the second fiber coupler (4.1) that input end is connected with the output terminal of the second fiber Bragg grating strain sensor (3.1), the second inner connecting fiber (5.1) that one end is connected with the second fiber coupler (4.1) output terminal, the the second outside connecting fiber (6.1) be connected with the other end of the second inner connecting fiber (5.1), wherein, second inner connecting fiber (5.1) connects the second outside connecting fiber (6.1) by the second fibre-optical splice (10.1), described second outside connecting fiber (6.1) incoming fiber optic grating demodulation instrument (7), described first glass fiber tape (2) is positioned at the middle part of transformer coli winding surface insulation paper (1), described second glass fiber tape (2.1) is positioned at the top of the first glass fiber tape (2),
Transformer Winding width also comprises the 3rd fibre-optical splice (10.2) to stress measurement device, be pasted onto the 3rd glass fiber tape (2.2) on transformer coli winding surface insulation paper (1), be fixed on the 3rd fiber Bragg grating strain sensor (3.2) on the 3rd glass fiber tape (2.2), the 3rd fiber coupler (4.2) that input end is connected with the output terminal of the 3rd fiber Bragg grating strain sensor (3.2), the 3rd inner connecting fiber (5.2) that one end is connected with the 3rd fiber coupler (4.2) output terminal, the 3rd outside connecting fiber (6.2) be connected with the other end of the 3rd inner connecting fiber (5.2), wherein, described 3rd inner connecting fiber (5.2) connects the 3rd outside connecting fiber (6.2) by the 3rd fibre-optical splice (10.2), described 3rd outside connecting fiber (6.2) incoming fiber optic grating demodulation instrument (7), described 3rd glass fiber tape (2.2) is positioned at the below of the first glass fiber tape (2),
It is characterized in that, method for measuring stress comprises the steps:
Step 1: the width that the corresponding measurement point of described transformer coli winding surface insulation paper (1) produces in real time is to strain, linearly characterized by the strain of the first glass fiber tape (2), first fiber Bragg grating strain sensor (3) responds to the strain signal of the first glass fiber tape (2), and obtains corresponding photoinduction signal;
Step 2: the photoinduction signal obtained is sent to the first fiber coupler (4) and carries out signal amplification by described first fiber Bragg grating strain sensor (3);
Step 3: the photoinduction signal after amplification is transferred to fiber Bragg grating (FBG) demodulator (7) by the first inner connecting fiber (5) and the first outside connecting fiber (6) by the first fiber coupler (4), and the photoinduction signal receiving received becomes width to electrostrictive strain signal by fiber Bragg grating (FBG) demodulator (7);
Step 4: described fiber Bragg grating (FBG) demodulator (7) by width to electrostrictive strain Signal transmissions to computing machine (8), computing machine (8) is through calculating corresponding width to stress signal.
2. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: described step 1 also carry out step 1.1 while carrying out: the width that the corresponding measurement point of described transformer coli winding surface insulation paper (1) produces in real time is to strain, linearly characterized by the strain of the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) respectively, second fiber Bragg grating strain sensor (3.1) and the 3rd fiber Bragg grating strain sensor (3.2) respond to the strain signal of the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) respectively, and obtain corresponding photoinduction signal,
Described step 2 also carry out step 2.1 while carrying out: described second fiber Bragg grating strain sensor (3.1) and the 3rd fiber Bragg grating strain sensor (3.2) respectively the photoinduction signal obtained are sent to the second fiber coupler (4.1) and the 3rd fiber coupler (4.2) carries out signal amplification;
Described step 3 also carry out step 3.1 while carrying out: the second fiber coupler (4.1) and the 3rd fiber coupler (4.2) are by the photoinduction Signal transmissions after amplification to fiber Bragg grating (FBG) demodulator (7), and the photoinduction signal receiving received becomes width to electrostrictive strain signal by fiber Bragg grating (FBG) demodulator (7).
3. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: Transformer Winding width also comprises the optical fiber flange (9) be fixed on transformer-cabinet (11) to stress measurement device, transformer-cabinet (11) offers the first through hole (11.1), second through hole (11.2) and third through-hole (11.3), described optical fiber flange (9) offers the first method flange aperture (9.1) corresponding with the first through hole (11.1), second flange hole (9.2) corresponding with the second through hole (11.2), the three-flange hole (9.3) corresponding with third through-hole (11.3), wherein, described first fibre-optical splice (10) is assemblied in the first through hole (11.1) and first method flange aperture (9.1), described second fibre-optical splice (10.1) is assemblied in the second through hole (11.2) and the second flange hole (9.2), described 3rd fibre-optical splice (10.2) is assemblied in third through-hole (11.3) and three-flange hole (9.3).
4. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: described first glass fiber tape (2), the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) are arranged in parallel.
5. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: the two ends of described first glass fiber tape (2), the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) all with the justify align of transformer coli winding surface insulation paper (1), the width range of described first glass fiber tape (2) is 18 ~ 20mm, the width range of described second glass fiber tape (2.1) is 18 ~ 20mm, and the width range of described 3rd glass fiber tape (2.2) is 18 ~ 20mm.
6. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: the thickness of described first glass fiber tape (2), the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) is equal, and thickness range is 1.25 ~ 1.30mm.
7. Transformer Winding width according to claim 1 is to the method for measuring stress of stress measurement device, it is characterized in that: the tensile strength of described first glass fiber tape (2), the second glass fiber tape (2.1) and the 3rd glass fiber tape (2.2) is 11120N, and elastic modulus is 71.5GPa.
CN201310317143.0A 2013-07-25 2013-07-25 A kind of Transformer Winding width is to stress measurement device and measuring method CN103389176B (en)

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CN104216064A (en) * 2014-08-29 2014-12-17 中国科学院电工研究所 Wall outlet fiber-optic connector for transformers
CN105048316B (en) * 2015-06-03 2019-07-26 杭州钱江电气集团股份有限公司 A kind of transformer winding buckling deformation restoration methods
CN106091968A (en) * 2016-06-03 2016-11-09 中国电力科学研究院 Monitoring device and there is the transformator of this monitoring device
CN106091969A (en) * 2016-06-03 2016-11-09 中国电力科学研究院 Monitoring device and there is the transformator of this monitoring device
CN106091970A (en) * 2016-06-03 2016-11-09 中国电力科学研究院 Monitoring device and there is the transformator of this monitoring device
CN106052911A (en) * 2016-06-14 2016-10-26 东莞市联洲知识产权运营管理有限公司 Transformer winding stress monitoring device and monitoring method thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1160483A (en) * 1982-02-22 1983-09-01 Foxboro Company, The Fiber optic sensor
US4843233A (en) * 1987-05-11 1989-06-27 Photonetics S.A. Device for detecting vibrations including a multimode optical fiber as sensitive element
CN1049058A (en) * 1989-07-22 1991-02-06 云南省电力工业局试验研究所 On-line overvoltage monitor for electric power system
EP1040331A1 (en) * 1997-12-05 2000-10-04 Optoplan AS Device for measuring a bending load
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
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
CN102646490A (en) * 2012-04-28 2012-08-22 中国西电电气股份有限公司 Optical fiber electric/electrician insulating material and insulator thereof and method for preparing optical fiber electric/electrician insulating material
CN102818962A (en) * 2012-09-07 2012-12-12 江苏有能电力自动化有限公司 Online monitoring system of all-fiber grating power transformer
CN203337300U (en) * 2013-07-25 2013-12-11 国家电网公司 Transformer winding longitudinal stress measuring device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1160483A (en) * 1982-02-22 1983-09-01 Foxboro Company, The Fiber optic sensor
US4843233A (en) * 1987-05-11 1989-06-27 Photonetics S.A. Device for detecting vibrations including a multimode optical fiber as sensitive element
CN1049058A (en) * 1989-07-22 1991-02-06 云南省电力工业局试验研究所 On-line overvoltage monitor for electric power system
EP1040331A1 (en) * 1997-12-05 2000-10-04 Optoplan AS Device for measuring a bending load
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
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
CN102646490A (en) * 2012-04-28 2012-08-22 中国西电电气股份有限公司 Optical fiber electric/electrician insulating material and insulator thereof and method for preparing optical fiber electric/electrician insulating material
CN102818962A (en) * 2012-09-07 2012-12-12 江苏有能电力自动化有限公司 Online monitoring system of all-fiber grating power transformer
CN203337300U (en) * 2013-07-25 2013-12-11 国家电网公司 Transformer winding longitudinal stress measuring device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王国利, 郝艳捧, 李彦明.光纤技术在电力变压器绝缘监测中的应用.《高压电器》.2001,第37卷(第2期),第32-35页. *

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