CN107436397A - A kind of high voltage power distribution transformer part electric leakage alarm device - Google Patents
A kind of high voltage power distribution transformer part electric leakage alarm device Download PDFInfo
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- CN107436397A CN107436397A CN201710406497.0A CN201710406497A CN107436397A CN 107436397 A CN107436397 A CN 107436397A CN 201710406497 A CN201710406497 A CN 201710406497A CN 107436397 A CN107436397 A CN 107436397A
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- fbg
- high voltage
- power distribution
- electric leakage
- voltage power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a kind of high voltage power distribution transformer part electric leakage alarm device by LASER Light Source, three-dB coupler, single-mode fiber, FBG, quartz ampoule, FBGA demodulation modules and computer composition.The FBG for occurring the acoustic pressure excitation some tension of high penetrating power ultrasonic wave caused by local electric leakage moment using high-tension coil resonates, cause FBG bragg wavelength occur it is quick, significantly beat, whether detection reflection center wavelength of light in given threshold realizes fault pre-alarming.FBG resonant frequencies are set as 120kHz~130kHz, frequency of sound wave response range is 30kHz~240kHz.Sensing element is very thin compact, integral insulation, and pre-warning signal does not all need special insulation measures from producing to transmitting, and is very easily combined with high voltage power distribution transformer.Therefore, the present invention has compact-sized, securely and reliably, the advantages of cost is cheap, the effect of reality can be played in power grid maintenance and in terms of ensureing Electrical Safety.
Description
Technical field
The invention belongs to technical field of electric power detection, and in particular to a kind of high voltage power distribution transformer part leakage-current alarm dress
Put.
Background technology
High-tension distribution equipment is related to the stability of electrical power transmission system end, its core component high voltage power distribution transformer
Non-artificial damage, insulating barrier caused by local electric leakage punctures during mainly due to fully loaded work.
Equipment running status information can be provided for the online measuring technique of high-tension distribution equipment, helps power network to adopt in time
Emergency measure is taken, unexpected tripping operation is efficiently reduced and reduces power grid maintenance cost, helps to ensure enterprise and the electricity consumption peace of resident
Entirely, sensor fibre receives the concern of detection device manufacturing enterprise in this field.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of high voltage power distribution transformer part leakage-current alarm
Device, occurs the FBG of the acoustic pressure excitation some tension of high penetrating power ultrasonic wave caused by local electric leakage moment using high-tension coil
Resonate, cause FBG bragg wavelength occur it is quick, significantly beat, whether detection reflection center wavelength of light is setting
Determine to realize fault pre-alarming in threshold value, its sensing element is very thin compact, and cost is cheap, and the generation and transmission of pre-warning signal are all not required to
Special insulation measures are wanted, working life is up to the several years.
The present invention is achieved through the following technical solutions：A kind of high voltage power distribution transformer part electric leakage alarm device, its feature
It is：By LASER Light Source (1), three-dB coupler (2), single-mode fiber (3), FBG (4), quartz ampoule (5), FBGA demodulation modules (6)
Formed with computer (7)；LASER Light Source (1) is connected with the input of three-dB coupler (2)；The output end warp of three-dB coupler (2)
Single-mode fiber (3) is connected with FBG (4) left end, and FBG (4) grid region both ends are fixed on the axle center of quartz ampoule (5) by epoxy resin
Place, and some tension is maintained, resonant frequency is 120kHz~130kHz, and frequency of sound wave response range is 30kHz~240kHz；
The reflection end of three-dB coupler (2) is connected with FBGA demodulation modules (6), passes through between computer (7) and FBGA demodulation modules (6)
USB is communicated.
The centre wavelength that described LASER Light Source (1) produces laser is 1550nm, power 1.5mW.
The grid cycle that described FBG (4) is inscribed is 535nm, bragg wavelength 1550nm.
The present invention operation principle be：The laser of LASER Light Source (1) transmitting passes through three-dB coupler (2) and single-mode fiber (3)
Transmit to FBG (4).FBG (4) is the space phase periodic distribution grating formed in fibre core, and its effect is formed in fibre core
The reflection optical filter of one arrowband.Therefore when incident light passes through FBG (4), the light generation reverse transfer near bragg wavelength,
Reflectivity is more than 90%.Reflected light is emitted through single-mode fiber (3) from the reflection end of three-dB coupler (2), and then is demodulated by FBGA
Module (6) receives and extraction centre wavelength.Communicated between computer (7) and FBGA demodulation modules (6) by USB, realize signal
Display and distant early warning function.
Research shows that the moment of local electric leakage, generally driving frequency was super in the range of 30kHz~300kHz in atmosphere
Sound wave, and relation be present between frequency of sound wave and high pressure piezoelectric voltage.Oscillating component and horizontal stroke that can be by sonolysis for longitudinal direction
To transmission component both of which, high voltage power distribution inside transformer insulating oil main component is organic hydrocarbon, is considered as one kind
It is low-loss, the homogeneous liquid mediums of refractive index, therefore the propagation of longitudinal oscillating component can be supported well.
FBG (4) grid region both ends are fixed on by epoxy resin at the axle center of quartz ampoule (5), and maintain some tension, quartz
The cavity of pipe (5) plays a part of collecting acoustic vibration.The purpose to FBG (4) setting tension force is in advance, it is being inscribed grid
The lattice cycle be 535nm under bragg wavelength be 1550nm, now FBG (4) resonant frequency is 121kHz, frequency of sound wave response
Scope is 30kHz~240kHz.When high voltage power distribution transformer produces local electric leakage, the acoustic pressure of ultrasonic wave is applied to very thin FBG (4)
Add stress, covibration occurs because both vibration frequencies are close.
The beneficial effects of the invention are as follows：First, sensing element of the invention is very thin compact, integral insulation, pre-warning signal from
Produce transmission and all do not need special insulation measures, contribute to control cost；Secondly, the design is very easily and high voltage power distribution
Transformer combines, and fault rate is low, and service life reaches the several years.Therefore, the present invention has compact-sized, and securely and reliably, cost is low
The advantages of honest and clean, the effect of reality can be played in power grid maintenance and in terms of ensureing Electrical Safety.
Brief description of the drawings
Fig. 1 is a kind of system construction drawing of high voltage power distribution transformer part electric leakage alarm device.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
Referring to accompanying drawing 1, a kind of high voltage power distribution transformer part electric leakage alarm device is by LASER Light Source (1), three-dB coupler
(2), single-mode fiber (3), FBG (4), quartz ampoule (5), FBGA demodulation modules (6) and computer (7) composition；LASER Light Source (1) with
The input of three-dB coupler (2) is connected；The output end of three-dB coupler (2) is connected through single-mode fiber (3) with FBG (4) left end,
FBG (4) grid region both ends are fixed on by epoxy resin at the axle center of quartz ampoule (5), and maintain some tension, and resonant frequency is
120kHz~130kHz, frequency of sound wave response range are 30kHz~240kHz；The reflection end of three-dB coupler (2) demodulates with FBGA
Module (6) is connected, and is communicated between computer (7) and FBGA demodulation modules (6) by USB.Further, LASER Light Source (1) produces
The centre wavelength of raw laser is 1550nm, power 1.5mW；The grid cycle that described FBG (4) is inscribed is 535nm, Prague
Wavelength is 1550nm.
Under normal circumstances, frequency hardly has an impact less than 30kHz sound waves to FBG (4).Generation local electric leakage moment,
High-frequency ultrasonic resonates with FBG (4), and grid length constantly changes, and the centre wavelength for showing as FBG (4) reflected light is violent
Bounce.Once centre wavelength exceeds given threshold, computer (7) sends alarm signal.
Claims (3)
- A kind of 1. high voltage power distribution transformer part electric leakage alarm device, it is characterised in that：By LASER Light Source (1), three-dB coupler (2), single-mode fiber (3), FBG (4), quartz ampoule (5), FBGA demodulation modules (6) and computer (7) composition；LASER Light Source (1) with The input of three-dB coupler (2) is connected；The output end of three-dB coupler (2) is connected through single-mode fiber (3) with FBG (4) left end, FBG (4) grid region both ends are fixed on by epoxy resin at the axle center of quartz ampoule (5), and maintain some tension, and resonant frequency is 120kHz~130kHz, frequency of sound wave response range are 30kHz~240kHz；The reflection end of three-dB coupler (2) demodulates with FBGA Module (6) is connected, and is communicated between computer (7) and FBGA demodulation modules (6) by USB.
- A kind of 2. high voltage power distribution transformer part electric leakage alarm device according to claim 1, it is characterised in that：Described The centre wavelength that LASER Light Source (1) produces laser is 1550nm, power 1.5mW.
- A kind of 3. high voltage power distribution transformer part electric leakage alarm device according to claim 1, it is characterised in that：Described The grid cycle that FBG (4) is inscribed is 535nm, bragg wavelength 1550nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406497.0A CN107436397A (en) | 2017-06-02 | 2017-06-02 | A kind of high voltage power distribution transformer part electric leakage alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406497.0A CN107436397A (en) | 2017-06-02 | 2017-06-02 | A kind of high voltage power distribution transformer part electric leakage alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107436397A true CN107436397A (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710406497.0A Pending CN107436397A (en) | 2017-06-02 | 2017-06-02 | A kind of high voltage power distribution transformer part electric leakage alarm device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427940A (en) * | 2022-01-20 | 2022-05-03 | 北京工业大学 | High-pressure hydrogen leakage detection method and system |
-
2017
- 2017-06-02 CN CN201710406497.0A patent/CN107436397A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427940A (en) * | 2022-01-20 | 2022-05-03 | 北京工业大学 | High-pressure hydrogen leakage detection method and system |
| CN114427940B (en) * | 2022-01-20 | 2024-03-08 | 北京工业大学 | High-pressure hydrogen leakage detection method and system |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171205 |