CN202372611U - Optical fiber acoustic emission sensor and transformer partial discharge and location online monitoring system - Google Patents

Optical fiber acoustic emission sensor and transformer partial discharge and location online monitoring system Download PDF

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Publication number
CN202372611U
CN202372611U CN2011205185877U CN201120518587U CN202372611U CN 202372611 U CN202372611 U CN 202372611U CN 2011205185877 U CN2011205185877 U CN 2011205185877U CN 201120518587 U CN201120518587 U CN 201120518587U CN 202372611 U CN202372611 U CN 202372611U
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China
Prior art keywords
sensor
probe seat
sensor probe
partial discharge
monitoring system
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Expired - Lifetime
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CN2011205185877U
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Chinese (zh)
Inventor
闵力
祁海峰
王金玉
宋广东
赵林
王英英
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Laser Institute of Shandong Academy of Science
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Laser Institute of Shandong Academy of Science
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Priority to CN2011205185877U priority Critical patent/CN202372611U/en
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Anticipated expiration legal-status Critical
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Abstract

Provided are an optical fiber acoustic emission sensor and a transformer partial discharge and location online monitoring system. The transformer partial discharge and location online monitoring system comprises a fused biconical taper excessive coupling optical fiber acoustic emission sensor and is characterized in that the fused biconical taper excessive coupling optical fiber acoustic emission sensor comprises a sensor probe seat. A circular groove is arranged at the center of the sensor probe seat, and a rare earth permanent magnet is arranged in the circular groove. An arc-shaped groove and a V-shaped groove which interpenetrate and are used for arranging fused biconical taper excessive coupling optical fibers are arranged on the sensor probe seat and surround the circular groove. A fiber outlet communicated with the V-shaped groove is arranged on the sensor probe seat. The optical fiber acoustic emission sensor is mainly used for manufacturing a novel transformer partial discharge and discharge location optical fiber online monitoring system.

Description

Optical Fibre Acoustic Emission Sensor and partial discharge of transformer and be positioned at line monitoring system
Technical field
The utility model design relates to a kind of partial discharge of transformer and positioning optical waveguides on-line monitoring system, relates in particular to a kind of partial discharge of transformer Fibre Optical Sensor and discharge examination, discharge location on-Line Monitor Device of novel package structure.
Background technology
Large-scale high-tension power transmission and transformation equipment is transformer especially, is the basis that guarantees power supply reliability, also is the basic assurance that electric power safety is produced.Sound wave pulse is a kind of means of direct measuring transformer shelf depreciation, the inner fault that occurs of the detection transformer that it can be instantaneous.The calibrate AE sensor that uses optical fiber fabrication to form has that volume is little, insulativity is high; Do not receive the characteristic of electromagnetic interference (EMI) fully; Thereby when monitoring power transformer health status; Can Fibre Optical Sensor be attached to transformer surface or directly place inner and transformer combines together and is formed on line monitoring system, reflect the situation of transformer internal operation in real time.Can grasp the truth of transformer equipment built-in electrical insulation in time based on the running status of the on-line monitoring transformer of Fibre Optical Sensor, find the inner potential faults that exists of transformer as soon as possible, have very important significance.
One Chinese patent application number is for " 201020302185.9 provide a kind of partial discharge of transformer pick-up unit based on the excessive coupled fiber sensor of fused biconical taper, but do not relate to sensor array, the positioning system of shelf depreciation.
One Chinese patent application number is: 201010023128.1 provide a kind of detects Partial Discharge in Power Transformer on-line monitoring and positioning system based on the fiber ultrasonic wave sensor; Wherein the scope of bandpass filtering is 160KHz-200KHz, and is provided with the threshold voltage of 0.5V according to the noise size.
Summary of the invention
The purpose of the utility model is to solve the online monitoring problem of Partial Discharge in Power Transformer and discharge location, and a kind of fused biconical taper excessive coupled fiber sensor shelf depreciation of novel encapsulated and transformer online monitoring system of discharge location of adopting is provided.This system have essential safety, insulativity high, be prone to installation, remote online monitoring, can access network based on ethernet etc. advantage.
For achieving the above object; The utility model adopts following scheme: a kind of partial discharge of transformer and be positioned at line monitoring system; It comprises the excessive coupled fiber calibrate AE sensor of fused biconical taper; It is characterized in that the excessive coupled fiber calibrate AE sensor of said fused biconical taper comprises the sensor probe seat, central authorities are provided with circular groove at the sensor probe seat, and rare-earth permanent magnet is set in circular groove; On the sensor probe seat, be provided with the deep-slotted chip breaker and the V-shaped groove that are used to arrange the excessive coupled fiber of fused biconical taper of mutual perforation, on the sensor probe seat, also be provided with the fiber mouth that is communicated with V-shaped groove around circular groove.
The concrete characteristics of this programme also have, and also are provided with the cover plate that cooperates with the sensor probe seat.
The part that the excessive coupled fiber of said fused biconical taper is arranged in deep-slotted chip breaker is unsettled arrangement, then uses 3A glue and sensor probe seat bonding for surplus.
Threaded optical fiber metal connector is set in the fiber mouth.
The excessive coupled fiber calibrate AE sensor of fused biconical taper is connected with semiconductor DFB light with opto-electronic conversion and filter respectively; Photosignal conversion and filter and data collecting card electrically connect; Data collecting card and embedded main board electrically connect.The semiconductor DFB wavelength is 1309nm-1311nm.
Said photosignal conversion and filter mainly comprise photoelectric switching circuit, signal amplification circuit, differential amplifier circuit, high-pass filtering circuit, low-pass filter circuit.
Said photosignal conversion and filter utilize Sub-miniature B and data acquisition card connection; Data collecting card is connected with embedded main board through PCI slot or USB interface.
The excessive coupled fiber calibrate AE sensor of fused biconical taper is installed in transformer case center, four sides or inside, forms sensor array.
A kind of Optical Fibre Acoustic Emission Sensor; It is characterized in that it comprises the sensor probe seat; Central authorities are provided with circular groove at the sensor probe seat; Rare-earth permanent magnet is set in circular groove, on the sensor probe seat, is provided with the deep-slotted chip breaker and the V-shaped groove that are used to arrange the excessive coupled fiber of fused biconical taper of mutual perforation, on the sensor probe seat, also be provided with the fiber mouth that is communicated with V-shaped groove around circular groove.
The concrete characteristics of this programme also have, and also are provided with the cover plate that cooperates with the sensor probe seat.
The part that the excessive coupled fiber of said fused biconical taper is arranged in deep-slotted chip breaker is unsettled arrangement, then uses 3A glue and sensor probe seat bonding for surplus.
Threaded optical fiber metal connector is set in the fiber mouth.
The utility model beneficial effect is: 1, the detection frequency bandwidth of this system is 10K-300KHz, satisfies the conventional spectral range of partial discharge of transformer fully; 2, with the novel sensor of square aluminium flake encapsulation, sensing sensitivity is high, and is not fragile, and contains rare-earth permanent magnet, is easy to install, and it is convenient to change; 3, this system is highly sensitive, and peak value can reach-55dB ref 1V/ μ bar; 4, this system can not be higher than 50 pC by detected minimum partial discharge quantity, and measuring accuracy is high; 5, adopt single semiconductor DFB light source, with low cost, be fit to quantize to produce.
Description of drawings
Fig. 1 is the sensor construction figure of the utility model; Fig. 2 is the circuit principle structure figure of photosignal conversion and filter; Among the figure: the 1-fixing threaded hole; The 2-circular groove; The 3-deep-slotted chip breaker; The 4-V-shaped groove; 5-fiber mouth; 6-sensor probe seat; The 7-cover plate.
Embodiment
The preferred embodiment accompanying drawings that the utility model relates to is following:
As illustrated in fig. 1 and 2; A kind of partial discharge of transformer and be positioned at line monitoring system; It comprises the excessive coupled fiber calibrate AE sensor of fused biconical taper; The excessive coupled fiber calibrate AE sensor of said fused biconical taper comprises the seat of sensor probe shown in Fig. 16, and 6 central authorities are provided with circular groove 2 at the sensor probe seat, in circular groove 2, places the rare-earth permanent magnet of diameter 25mm; On sensor probe seat 6, be provided with the deep-slotted chip breaker 3 and V-shaped groove 4 that are used to arrange the excessive coupled fiber of fused biconical taper of mutual perforation, on sensor probe seat 6, also be provided with the fiber mouth 5 that is communicated with V-shaped groove 4 around circular groove 2.Also be provided with the cover plate 7 that cooperates with sensor probe seat 6.The part that the excessive coupled fiber of said fused biconical taper is arranged in deep-slotted chip breaker 3 is unsettled arrangement, then uses 3A glue and sensor probe seat 6 bonding for surplus.Threaded optical fiber metal connector is set in the fiber mouth 5.Sensor probe seat 6 and cover plate 7 are tightened through 5 threaded holes of fixing threaded hole 1 representative, after the spectrometer detection calibrate AE sensor curve of spectrum is normal, water-stop is taken over control in the open weld of finedraw between sensor probe seat 6 and the cover plate 7 and fixing threaded hole 1.The excessive coupled fiber calibrate AE sensor of fused biconical taper is connected with semiconductor DFB light with photosignal conversion and filter respectively; Photosignal conversion and filter and data collecting card electrically connect; Data collecting card and embedded main board electrically connect.The semiconductor DFB wavelength is 1309nm-1311nm.Said photosignal conversion and filter mainly comprise photoelectric switching circuit, signal amplification circuit, differential amplifier circuit, high-pass filtering circuit, low-pass filter circuit.Said photosignal conversion and filter utilize Sub-miniature B and data acquisition card connection; Data collecting card is connected with embedded main board through PCI slot or USB interface.The excessive coupled fiber calibrate AE sensor of fused biconical taper is installed in transformer case center, four sides or inside, forms sensor array.This system comprises one of acoustic emission fibre optic sensor arra (4-6), acoustic emission automonitor, and this monitor includes PCM9362 embedded main board, usb data capture card (more than the 2M), display screen, photosignal conversion and filter, shunt box, semiconductor DFB.
The course of work of this device: the way through adhesive or welding is installed in center, transformer case four sides with 4 hermetically sealed calibrate AE sensors.After the acoustic emission automonitor energized; The semiconductor laser of 1310nm wave band is via the calibrate AE sensor emission laser of 1 minute 4 passage in the shunt box to the excessive coupled fiber of fused biconical taper, and transmitted light carries out becoming the voltage signal in the positive and negative 5V scope after photosignal conversion, signal amplification, the signal filtering processing through opto-electronic conversion and filter.Voltage signal gets into the synchronous 2MHz collection of simulant signal of 4 passages card through Sub-miniature B, capture card inside to image data mean value software filtering after, import 4 groups of synchronous acoustic emission signals into the PCM9362 embedded main board through USB interface.Embedded main board utilizes amplitude, mistiming, the spectrum analysis of 4 passage acquired signal, calculates the size of partial discharge quantity and partial discharge position positioned.Embedded main board is handled the shelf depreciation acoustic emission signal that is obtained; Owing to be arranged in the locus difference of the calibrate AE sensor of transformer case diverse location; The ultrasonic signal asynchronism(-nization) that detected shelf depreciation produces; By the mistiming of discharge capacity size that obtains after handling and reception signal, can confirm the locus of shelf depreciation power supply.Result after the processing is shown by display screen.

Claims (10)

1. a partial discharge of transformer and be positioned at line monitoring system; It comprises the excessive coupled fiber calibrate AE sensor of fused biconical taper; It is characterized in that the excessive coupled fiber calibrate AE sensor of said fused biconical taper comprises the sensor probe seat; Central authorities are provided with circular groove at the sensor probe seat; Rare-earth permanent magnet is set in circular groove, on the sensor probe seat, is provided with the deep-slotted chip breaker and the V-shaped groove that are used to arrange the excessive coupled fiber of fused biconical taper of mutual perforation, on the sensor probe seat, also be provided with the fiber mouth that is communicated with V-shaped groove around circular groove.
2. partial discharge of transformer according to claim 1 and be positioned at line monitoring system is characterized in that also being provided with the cover plate that cooperates with the sensor probe seat.
3. partial discharge of transformer according to claim 1 and be positioned at line monitoring system is characterized in that the part that the excessive coupled fiber of said fused biconical taper is arranged in deep-slotted chip breaker is unsettled arrangement, then uses 3A glue and sensor probe seat bonding for surplus.
4. partial discharge of transformer according to claim 1 and be positioned at line monitoring system is characterized in that being provided with in the fiber mouth threaded optical fiber metal connector.
5. partial discharge of transformer according to claim 1 and be positioned at line monitoring system is characterized in that the excessive coupled fiber calibrate AE sensor of fused biconical taper is connected with semiconductor DFB light with opto-electronic conversion and filter respectively; Said photosignal conversion and filter utilize Sub-miniature B to be electrically connected with data collecting card; Data collecting card is electrically connected with embedded main board through PCI slot or USB interface, and the semiconductor DFB wavelength is 1309nm-1311nm.
6. partial discharge of transformer according to claim 5 and be positioned at line monitoring system is characterized in that said photosignal conversion and filter mainly comprise photoelectric switching circuit, signal amplification circuit, differential amplifier circuit, high-pass filtering circuit, low-pass filter circuit.
7. partial discharge of transformer according to claim 1 and be positioned at line monitoring system is characterized in that the excessive coupled fiber calibrate AE sensor of fused biconical taper is installed in transformer case center, four sides or inside, forms sensor array.
8. Optical Fibre Acoustic Emission Sensor; It is characterized in that it comprises the sensor probe seat; Central authorities are provided with circular groove at the sensor probe seat; Rare-earth permanent magnet is set in circular groove, on the sensor probe seat, is provided with the deep-slotted chip breaker and the V-shaped groove that are used to arrange the excessive coupled fiber of fused biconical taper of mutual perforation, on the sensor probe seat, also be provided with the fiber mouth that is communicated with V-shaped groove around circular groove.
9. Optical Fibre Acoustic Emission Sensor according to claim 8 is characterized in that also being provided with the cover plate that cooperates with the sensor probe seat.
10. Optical Fibre Acoustic Emission Sensor according to claim 8 is characterized in that the part that the excessive coupled fiber of said fused biconical taper is arranged in deep-slotted chip breaker is unsettled arrangement, then uses 3A glue and sensor probe seat bonding for surplus; Threaded optical fiber metal connector is set in the fiber mouth.
CN2011205185877U 2011-12-13 2011-12-13 Optical fiber acoustic emission sensor and transformer partial discharge and location online monitoring system Expired - Lifetime CN202372611U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205185877U CN202372611U (en) 2011-12-13 2011-12-13 Optical fiber acoustic emission sensor and transformer partial discharge and location online monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205185877U CN202372611U (en) 2011-12-13 2011-12-13 Optical fiber acoustic emission sensor and transformer partial discharge and location online monitoring system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880651A (en) * 2015-05-28 2015-09-02 国网山西省电力公司电力科学研究院 Transformer internal partial discharge determination device and positioning method thereof
CN105044568A (en) * 2015-06-30 2015-11-11 山东微感光电子有限公司 Optical fiber ultrasonic detection system and detection method with self-adaptive transformer partial discharge
CN108872813A (en) * 2018-07-04 2018-11-23 太原理工大学 A kind of optical fiber pick-up probe device for cable local discharge detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880651A (en) * 2015-05-28 2015-09-02 国网山西省电力公司电力科学研究院 Transformer internal partial discharge determination device and positioning method thereof
CN105044568A (en) * 2015-06-30 2015-11-11 山东微感光电子有限公司 Optical fiber ultrasonic detection system and detection method with self-adaptive transformer partial discharge
CN108872813A (en) * 2018-07-04 2018-11-23 太原理工大学 A kind of optical fiber pick-up probe device for cable local discharge detection
CN108872813B (en) * 2018-07-04 2020-12-15 太原理工大学 Optical fiber pickup probe device for cable partial discharge detection

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Granted publication date: 20120808

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