CN201955379U - Optical fiber type high voltage monitoring device - Google Patents

Optical fiber type high voltage monitoring device Download PDF

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Publication number
CN201955379U
CN201955379U CN2010206482931U CN201020648293U CN201955379U CN 201955379 U CN201955379 U CN 201955379U CN 2010206482931 U CN2010206482931 U CN 2010206482931U CN 201020648293 U CN201020648293 U CN 201020648293U CN 201955379 U CN201955379 U CN 201955379U
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China
Prior art keywords
substrate
gullet plate
optical
high voltage
tooth
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Expired - Fee Related
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CN2010206482931U
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Chinese (zh)
Inventor
杜兵
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Xian Jinhe Optical Technology Co Ltd
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Xian Jinhe Optical Technology Co Ltd
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Abstract

The utility model discloses an optical fiber type high voltage monitoring device, which comprises a first electrode, a ground potential electrode and at least one optical fiber sensitive unit. The high voltage of a high-voltage is loaded on the optical fiber sensitive unit through the first electrode and the ground potential electrode, the optical fiber sensitive unit comprises a first substrate, the first substrate is provided with a first toothed plate and a second toothed plate, the first toothed plate is provided with first deformation teeth, the second toothed plate is provided with second deformation teeth, the first toothed plate and the second toothed plate are arranged in parallel, the first deformation teeth and the second deformation teeth are arranged correspondingly in a staggered way and between the first toothed plate and the second toothed plate, groove are arranged between the first deformation teeth, the second toothed plate is provided with a single optical fiber wound in a plurality of turns, the single optical fiber is arranged in the grooves and is connected with an optical cable, the optical cable is connected with a testing unit, and the testing unit is connected with a processing unit. By increasing the number of the deformation teeth and the length of the signal optical fiber to a large extent, subtle deformation can be detected.

Description

Optical-fiber type high voltage monitoring device
Technical field
The utility model relates to a kind of optical voltage sensing device, particularly a kind of optical-fiber type high voltage monitoring device.
Background technology
The measuring method of optical fiber high-voltage sensor use at present mainly contains polarization state of light mensuration, interference of light mensuration and wavelength-modulated mensuration.Polarization state of light is measured mainly based on Faraday magnetooptical effect, uses magneto-optical crystal under the outfield changes the polarisation of light direction to be changed and reaches test purpose, is the ripe relatively sensor of research at present, existing a small amount of commercial applications.The interference of light method mainly is that the optical path difference of utilizing the outfield to change coherent light is measured, mainly based on the measurement of Michelson's interferometer or Mach-Zehnder interferometer.The wavelength-modulated mensuration is thereby that light wavelength is measured the method that detects outer field signal.Mainly be to finish, need to use the Wavelength demodulation device by fiber bragg grating sensing device or Fabry-Perot interference sensor.These several sensing devices in theory all can be finished the detection to parameters of electric power, but interference, particularly temperature, vibration owing to external environment when practical application cause error can not satisfy request for utilization too greatly, have hindered promoting the use of of such fibre optic current sensor.
Chinese patent application number is that 200510019497.2 " optical fibre voltage sensors " disclose a kind of scheme, and it is made up of the gullet plate that two parallel electrostriction materials constitute.The distortion tooth that this scheme adopts is few, the sensor fibre length of distortion between cog is short, make the ability of its image data relatively poor, the sensor fibre bending curvature causes serviceable life short for a short time, data that collect or the precision high dynamic range is little, the big precision of dynamic range is low, can't satisfy application request.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of optical-fiber type high voltage monitoring device is provided.The utility model can adopt quantity that increases considerably the distortion tooth and the length that prolongs signal optical fibre significantly, trickle distortion also can be detected, the precision and the dynamic range of this sensing device have been improved, and it is simple in structure, easy to use, cost is low, has good marketing prospect.
For achieving the above object, the technical solution adopted in the utility model is: optical-fiber type high voltage monitoring device, it is characterized in that: comprise electrode one, earth potential electrode and at least one the optical fiber sensing unit between electrode one and earth potential electrode, high voltage bus is carried on the described optical fiber sensing unit by electrode one and the earth potential electrode high voltage with high voltage bus, described optical fiber sensing unit comprises substrate one, described substrate one is provided with gullet plate one and gullet plate two, described substrate one and be arranged on gullet plate one on the substrate one and gullet plate two at least thrin or at least the part of thrin constitute by electrostriction material or contrary piezoelectric or the coating surface that be out of shape tooth one and distortion tooth two has electrostriction material or against piezoelectric, described gullet plate one is provided with distortion tooth one, described gullet plate two is provided with distortion tooth two, described gullet plate one is parallel mutually with gullet plate two, described distortion tooth one and distortion tooth two are staggered mutually corresponding and between described gullet plate one and gullet plate two, and described gullet plate one can relative or opposite motion change occur along with the change in voltage that loads on the optical fiber sensing unit with respect to gullet plate two, between cog at distortion tooth one is fluted, described gullet plate two be provided with multiturn around signal optical fibre, and described signal optical fibre is placed in groove, described signal optical fibre is connected with optical cable, described optical cable is connected with test cell, and described test cell is connected with processing unit.
Above-mentioned optical-fiber type high voltage monitoring device, the two ends of described signal optical fibre are equipped with light reflecting device, and this light reflecting device is light reflection mirror, fiber grating, contain the optical fiber of bubble or through the end face of the optical fiber of the signal of mirror process.
Above-mentioned optical-fiber type high voltage monitoring device, described optical fiber sensing unit are parallel with one another two or more, and the signal optical fibre in each optical fiber sensing unit is connected on the optical cable and is connected on the test cell.
Above-mentioned optical-fiber type high voltage monitoring device, described substrate one is provided with substrate two and substrate three, described gullet plate one and gullet plate two are fixed on the substrate one by substrate two and substrate three respectively, and described gullet plate one, gullet plate two, substrate one, substrate two, substrate three, distortion tooth one, distortion tooth two and signal optical fibre satisfy following formula:
α 1L 1Δ T-α 2L 2Δ T-α 3L 3Δ T-α Tooth(L 1 tooth+ L 2 teeth) Δ T-α Fined FineΔ T=0
Wherein, α 2And α 3Be respectively the expansion coefficient of substrate two and substrate three materials, α 1Be the expansion coefficient of substrate one material, L in the formula 2, L 3Be respectively the length of substrate two and substrate three, Δ T is the temperature value that changes, L 1Be the length of substrate one, α ToothBe the expansion coefficient of distortion tooth one and distortion tooth two materials, L 1 tooth, L 2 teethBe respectively the height and the height that includes the distortion tooth two of gullet plate two thickness, α that includes the distortion tooth one of gullet plate one thickness FineBe the expansion coefficient of signal optical fibre, d FineEnd face diameter for signal optical fibre.
Above-mentioned optical-fiber type high voltage monitoring device, described optical fiber sensing unit is two or more, and it is together in series by metal tube and is installed in the insulation tube, is filled with the polyurethane of insulation in the described insulation tube internal pore, and the both sides of described insulation tube are provided with the corona discharge ring.
Above-mentioned optical-fiber type high voltage monitoring device, described gullet plate one and gullet plate two are made by crystal material.
Above-mentioned optical-fiber type high voltage monitoring device, described substrate one are to have quartz glass to make.
The utility model compared with prior art has the following advantages:
1, the utility model can amplify the signal that collects by the multiturn signal optical fibre, has improved the precision of this sensing device, and it is simple in structure, processing and fabricating convenient and version is various, and use-pattern is flexible.
2, use easy and simple to handle and each inter-module annexation is reasonable in design, be wound in signal optical fibre on the gullet plate two by multiturn, having increased greatly that signal optical fibre changes with signal can crooked length, thereby on the basis that guarantees signal optical fibre life-span, has improved measuring accuracy.
3, substrate one, gullet plate one and (or) gullet plate two adopts the crystal material with piezoelectric property, quartzy have inverse piezoelectric effect under the voltage field intensity, the subtle change of quartzy volume changes the bending curvature of signal optical fibre, thereby the loss of signal optical fibre internal transmission light signal is changed, and obtain this variation, thereby perceive the variation of voltage by test cell; Also can be according to the variation of the deformation of signal optical fibre bending curvature, utilize test cell to obtain the size of signal optical fibre deformation quantity and the variation of sense voltage particularly has broad application prospects in the extra-high pressure field in the electric power transfer field by interferometric method.
4, gullet plate one and gullet plate two are fixed on the substrate one, or gullet plate one is fixed on the substrate two, gullet plate two is fixed on the substrate three, described substrate two and substrate three are fixed on the substrate one, in this way gullet plate one and gullet plate two are fixed, can reach the effect of temperature compensation by the material of selecting to have suitable expansion coefficient respectively.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is for being the structural representation that includes optical fiber sensing unit vertical view of the utility model embodiment 1.
Fig. 2 is the optical fiber sensing unit master TV structure synoptic diagram of the utility model embodiment 1.
Fig. 3 is the optical fiber sensing unit master TV structure synoptic diagram of the utility model embodiment 2.
Fig. 4 is the structural representation of the utility model embodiment 3.
Description of reference numerals:
The 1-optical cable; 2-optical fiber sensing unit; The 5-test cell;
The 6-signal optical fibre; The 7-processing unit; 8-gullet plate one;
9-gullet plate two; 10-substrate one; 11-is out of shape tooth one;
12-is out of shape tooth two; The 16-groove; 24-substrate two;
25-substrate three; The 30-high voltage bus; 31-electrode two;
The 33-lead; 34-corona discharge ring; 35-electrode one;
36-earth potential electrode; The 37-metal tube; The 38-insulation tube;
39-polyurethane.
Embodiment
Embodiment 1
A kind of optical-fiber type high voltage monitoring device as depicted in figs. 1 and 2, comprise electrode 1, earth potential electrode 36 and at least one the optical fiber sensing unit 2 between electrode 1 and earth potential electrode 36, high voltage bus 30 is carried in the electrostriction material that comprises in the described optical fiber sensing unit 2 or the X-axis or the Y direction of contrary piezoelectric by electrode 1 and earth potential electrode 36 with the high voltage of high voltage bus 30, described optical fiber sensing unit 2 comprises substrate 1, described substrate 1 is provided with gullet plate 1 and gullet plate 29, described substrate 1 and be arranged on gullet plate 1 on the substrate 1 and gullet plate 29 at least thrin or at least the part of thrin constitute by electrostriction material or contrary piezoelectric or the coating surface that be out of shape tooth 1 and distortion tooth 2 12 has electrostriction material or against piezoelectric, described gullet plate 1 is provided with distortion tooth 1, described gullet plate 29 is provided with distortion tooth 2 12, described gullet plate 1 and gullet plate 29 are parallel to each other, described distortion tooth 1 and distortion tooth 2 12 interlaced correspondences and between described gullet plate 1 and gullet plate 29, and described gullet plate 1 can relative or opposite motion change occur along with the change in voltage that loads on optical fiber sensing unit 2 with respect to gullet plate 29, between cog fluted 16 at distortion tooth 1, described gullet plate 29 be provided with multiturn around signal optical fibre 6, and described signal optical fibre 6 is placed in groove 16, signal optical fibre 6 is held between distortion tooth 1 and the distortion tooth 2 12, described signal optical fibre 6 is connected with optical cable 1, described optical cable 1 is connected with test cell 5, and described test cell 5 is connected with processing unit 7.Described gullet plate 1 and gullet plate 29 are all bonding by adhesive, welding or screw are fastened on the substrate 1.The three of described substrate 1, gullet plate 1 and gullet plate 29 or thrin integral body are made of electrostriction material or contrary piezoelectric or be out of shapes that one of tooth 1 and distortion tooth 2 12 both or both are made of electrostriction material or contrary piezoelectric or the coating surface that be out of shape tooth 1 and be out of shape tooth 2 12 has electrostriction material or against piezoelectric.
The voltage course of monitoring tested high voltage bus 30 is: high voltage bus 30 is by electrode 2 31, lead 33 arrives electrode 35 with high voltage transfer, electrode 35 and earth potential electrode 36 load on this high voltage on the one optical fiber sensing unit 2, gullet plate 1 and (or) gullet plate 29 selects the crystal material that temperature performance and inverse piezoelectricity can be good for use, another gullet plate and substrate one 10 adopting quartz glass materials, preferred way is gullet plate 1 and gullet plate 29 and distortion tooth 1 and is out of shape tooth 2 12 and makes by crystal material, substrate one 10 adopting quartz glass are made, distortion tooth 1 and distortion tooth 2 12 are positioned on the opposite face of gullet plate 1 and gullet plate 29, and this opposite face is the Y direction of crystal material, signal optical fibre 6 is held in the groove 16, the voltage of electrode 35 and earth potential electrode 36 loads on the X-direction of the crystal material that constitutes gullet plate, during the change in voltage of electrode 35 and earth potential electrode 36, the Y direction of crystal material deforms flexible, promptly the height of gullet plate 1 that is made of crystal material and gullet plate 29 thickness and distortion tooth 1 and distortion tooth 2 12 also changes thereupon, thereby make the variable in distance between the distortion tooth 1 that is laid in respectively on gullet plate 1 and the gullet plate 29 and the distortion tooth 2 12, the bending curvature that is held on the signal optical fibre 6 between distortion tooth 1 and the distortion tooth 2 12 is changed, cause the variation of the optical signal power of signal optical fibre 6 internal transmission, test cell 5 detects this variation and test result is transferred to processing unit 7, and processing unit 7 is through calculating the voltage change of high voltage bus 30.This device can be monitored the high voltage bus below the 220kv 30.
Test cell 5 can be light source and light power meter, also can select for use optical time domain reflection technology and coincidence frequency modulated continuous wave technology to realize quasi-distributed or distributed measurement, or selects interferometer to carry out more high-precision measurement.The two ends of described signal optical fibre 6 also can be mounted with light reflecting device, and this reflection unit can be light reflection mirror, fiber grating, contain the optical fiber of bubble or through the end face of the optical fiber of the signal of mirror process.Test cell 5 can be by detecting two light reflecting devices the difference of intensity of reflected light signal obtain because the bending curvature of signal optical fibre 6 changes the attenuation change to the light signal of signal optical fibre 6 internal transmission, the benefit of doing like this is can subdue links such as light source, detector and optical cable 1 owing to change the interference that is brought, and further improves the precision of test result.
Preferably, two extremely plural optical fiber sensing units 2 in parallel between electrode 35 that links to each other with described high voltage bus 30 and the earth potential electrode 36, signal optical fibre 6 can be connected on the optical cable 1 and is connected to test cell 5 in each optical fiber sensing unit 2.
Described signal optical fibre 6 is surrounded by multilayer protection optical fiber for the outside, as tight tube fiber, carbon coated fiber, washing optical fiber or polyimide coated optical fiber.Described signal optical fibre 6 also can be multi-core fiber, polarization fiber, dual mode optical fiber, thin footpath optical fiber (as bare fibre external diameter 60 or 80 micron fiber), high molecular polymer optical fiber or photonic crystal fiber.
Embodiment 2
As shown in Figure 3, the difference of present embodiment and embodiment 1 only is: described substrate 1 is provided with substrate 2 24 and substrate 3 25, and described gullet plate 1 and gullet plate 29 are fixed on the substrate 1 by substrate 2 24 and substrate 3 25 respectively.Described gullet plate 1, gullet plate 29, substrate 1, substrate 2 24, substrate 3 25, distortion tooth 1, distortion tooth 2 12 and signal optical fibre 6 satisfy following formula:
α 1L 1ΔT-α 2L 2ΔT-α 3L 3ΔT
-α Tooth(L 1 tooth+ L 2 teeth) Δ T-α Fined FineΔ T=0
Wherein, α 2And α 3Wei substrate 2 24 and the expansion coefficient of substrate 3 25 materials, α 1Be the expansion coefficient of substrate one 10 materials, L in the formula 2, L 3Be respectively the length of substrate 2 24 and substrate 3 25, Δ T is the temperature value that changes, L 1Be the length of substrate 1, α ToothBe the expansion coefficient of distortion tooth 1 and distortion tooth 2 12 materials, L 1 tooth, L 2 teethBe respectively the height and the height that includes the distortion tooth 2 12 of gullet plate 29 thickness, α that includes the distortion tooth 1 of gullet plate one 8 thickness FineBe the expansion coefficient of signal optical fibre 6, d FineEnd face diameter for signal optical fibre 6.
As can be seen, when the expansion coefficient of the material of gullet plate 1, gullet plate 29, substrate 1, substrate 2 24, substrate 3 25 and signal optical fibre 6 satisfies above-mentioned formula, this device just can not be acted upon by temperature changes in certain range of temperature, has promptly compensated the change of variation of temperature to test result.In the accuracy requirement to test result is not under the very high situation, and the expansion coefficient computational item of relevant portion that also can remove signal optical fibre 6 is to reduce cost.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 3
As shown in Figure 4, the difference of present embodiment and embodiment 1 only is: described optical fiber sensing unit 2 is two or more, and two or more optical fiber sensing units 2 are together in series by metal tube 37 and are placed in the insulation tube 38, be filled with the polyurethane 39 of insulation in insulation tube 38 internal pores, the both sides of insulation tube 38 are provided with corona discharge ring 34, the voltage of high voltage bus 30 is applied on a plurality of optical fiber sensing units 2 that are together in series by electrode 35 and earth potential electrode 36, can make the voltage of the following high voltage bus 30 of this device monitoring 500kv like this, can monitor the high voltage bus 30 of voltage levels more by series connection more optical fiber sensing unit 2.Corona discharge ring 34 can reduce electric-force gradient, makes electrostriction that comprises in the optical fiber sensing unit 2 or the Electric Field Distribution of bearing against piezoelectric even relatively.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solutions of the utility model.

Claims (7)

1. optical-fiber type high voltage monitoring device, it is characterized in that: comprise electrode one (35), earth potential electrode (36) and be positioned at electrode one (35) and earth potential electrode (36) between at least one optical fiber sensing unit (2), high voltage bus (30) is carried on the described optical fiber sensing unit (2) by electrode one (35) and earth potential electrode (36) high voltage with high voltage bus (30), described optical fiber sensing unit (2) comprises substrate one (10), described substrate one (10) is provided with gullet plate one (8) and gullet plate two (9), described substrate one (10) and be arranged on gullet plate one (8) on the substrate one (10) and gullet plate two (9) at least thrin or at least the part of thrin constitute by electrostriction material or contrary piezoelectric or the coating surface that be out of shape tooth one (11) and be out of shape tooth two (12) has electrostriction material or against piezoelectric, described gullet plate one (8) is provided with distortion tooth one (11), described gullet plate two (9) is provided with distortion tooth two (12), described gullet plate one (8) and gullet plate two (9) are parallel to each other, described distortion tooth one (11) and distortion tooth two (12) interlaced correspondences also are positioned between described gullet plate one (8) and the gullet plate two (9), and described gullet plate one (8) can relative or opposite motion change occur along with the change in voltage that loads on optical fiber sensing unit (2) with respect to gullet plate two (9), between cog fluted (16) at distortion tooth one (11), described gullet plate two (9) be provided with multiturn around signal optical fibre (6), and described signal optical fibre (6) is placed in groove (16), described signal optical fibre (6) is connected with optical cable (1), described optical cable (1) is connected with test cell (5), and described test cell (5) is connected with processing unit (7).
2. optical-fiber type high voltage monitoring device according to claim 1, it is characterized in that: the two ends of described signal optical fibre (6) are equipped with light reflecting device, and this light reflecting device is light reflection mirror, fiber grating, contain the optical fiber of bubble or through the end face of the optical fiber of the signal of mirror process.
3. optical-fiber type high voltage monitoring device according to claim 1, it is characterized in that: described optical fiber sensing unit (2) is parallel with one another two or more, and the signal optical fibre (6) in each optical fiber sensing unit (2) is connected on an optical cable (1) and goes up and be connected on the test cell (5).
4. optical-fiber type high voltage monitoring device according to claim 1, it is characterized in that: described substrate one (10) is provided with substrate two (24) and substrate three (25), described gullet plate one (8) and gullet plate two (9) are fixed on the substrate one (10) by substrate two (24) and substrate three (25) respectively, and described gullet plate one (8), gullet plate two (9), substrate one (10), substrate two (24), substrate three (25), distortion tooth one (11), distortion tooth two (12) and signal optical fibre (6) satisfy following formula:
α 1L 1Δ T-α 2L 2Δ T-α 3L 3Δ T-α Tooth(L 1 tooth+ L 2 teeth) Δ T-α Fined FineΔ T=0
Wherein, α 2And α 3Be respectively the expansion coefficient of substrate two (24) and substrate three (25) materials, α 1Be the expansion coefficient of substrate one (10) material, L in the formula 2, L 3Be respectively the length of substrate two (24) and substrate three (25), Δ T is the temperature value that changes, L 1Be the length of substrate one (10), α ToothBe the expansion coefficient of distortion tooth one (11) and distortion tooth two (12) materials, L 1 tooth, L 2 teethBe respectively the height and the height that includes the distortion tooth two (12) of gullet plate two (9) thickness, α that includes the distortion tooth one (11) of gullet plate one (8) thickness FineBe the expansion coefficient of signal optical fibre (6), d FineEnd face diameter for signal optical fibre (6).
5. optical-fiber type high voltage monitoring device according to claim 1, it is characterized in that: described optical fiber sensing unit (2) is two or more, and it is together in series by metal tube (37) and is installed in the insulation tube (38), be filled with the polyurethane (39) of insulation in described insulation tube (38) internal pore, the both sides of described insulation tube (38) are provided with corona discharge ring (34).
6. optical-fiber type high voltage monitoring device according to claim 1 is characterized in that: described gullet plate one (8) and gullet plate two (9) are made by crystal material.
7. optical-fiber type high voltage monitoring device according to claim 6 is characterized in that: described substrate one (10) is made by quartz glass.
CN2010206482931U 2010-12-08 2010-12-08 Optical fiber type high voltage monitoring device Expired - Fee Related CN201955379U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316745B (en) * 2014-11-21 2017-01-11 贵州电力试验研究院 Optical electronic type voltage transformer based on Faraday magneto-optic current measurement
CN115711634A (en) * 2022-11-16 2023-02-24 江苏中天科技股份有限公司 Sensitivity-enhanced sensing optical cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316745B (en) * 2014-11-21 2017-01-11 贵州电力试验研究院 Optical electronic type voltage transformer based on Faraday magneto-optic current measurement
CN115711634A (en) * 2022-11-16 2023-02-24 江苏中天科技股份有限公司 Sensitivity-enhanced sensing optical cable
CN115711634B (en) * 2022-11-16 2023-09-19 江苏中天科技股份有限公司 Sensitivity-enhanced sensing optical cable

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Granted publication date: 20110831

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