CN104360254A - Ultrasonic detection system and method for fiber bragg grating for local discharge detection on electrical equipment in power grid - Google Patents
Ultrasonic detection system and method for fiber bragg grating for local discharge detection on electrical equipment in power grid Download PDFInfo
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Abstract
The invention discloses ultrasonic detection system and detection method for fiber bragg grating for local discharge detection on electrical equipment in a power grid. The detection system comprises a tunable laser, an optical coupler, a fiber bragg grating, a photoelectric transducer and a digital oscilloscope, wherein the fiber bragg grating is used for being bonded with to-be-detected electrical equipment; the optical coupler is respectively connected with the tunable laser, the optical coupler, the fiber bragg grating and the photoelectric transducer; the photoelectric transducer is connected with the digital oscilloscope; the photoelectric transducer converts a received optical signal into a voltage signal, and displays the voltage signal through the digital oscilloscope; and whether an ultrasonic signal exists can be obtained through the waveform change of the digital oscilloscope, so as to judge whether the electrical equipment carries out local discharge. The detection system is convenient to apply, is not easily affected by an environmental factor, especially is not easily affected by electromagnetic interference, is strong in environment suitability and high in detection sensitivity, and is capable of carrying out multi-point measurement on the electrical equipment. The invention also discloses a detection method of the ultrasonic detection system.
Description
Technical field
The present invention relates to checkout equipment and the method for electrical equipment in electrical network, specifically refer to the Fiber Bragg Grating ultrasonic wave detecting system and detection method that detect for electrical network local discharge of electrical equipment.
Background technology
Fiber-optic grating sensor is a kind of novel optical fiber sensor, and it has the advantage of ordinary optic fibre sensor: essential safety, volume are little, electromagnetism interference, have the ability worked in extreme circumstances.Compared with traditional light intensity type or interferometric optical fiber sensor, the most important advantage of fiber grating is that its transducing signal is wavelength-modulated, and in the process of signals collecting, measuring-signal is no longer subject to the restriction of the intensity of light source and stability in theory.On the other hand, this sensor makes multiple spot distributed sensing become possibility.
In recent years, along with fast development and the interdisciplinary intersection of each subject, fiber-optic grating sensor be not only proved to be can the effectively strain of test material, temperature, even acoustic pressure etc., and replace traditional piezoceramic transducer perception ultrasonic signal gradually.The hyperacoustic technology of fiber grating perception has very large application potential in electrical network local discharge of electrical equipment detects.
Conventional piezoelectric transducer in conventional ultrasonic wave input, in detection ultrasound process, piezoelectric sensing probe is coupled with measured object couplant, then the piezoelectric effect of piezoelectric is utilized to carry out work, namely inverse piezoelectric effect converts high-frequency electrical vibration to high-frequency mechanical vibration, thus produces ultrasound wave; And utilize direct piezo electric effect, can the ultrasound wave received be converted to electric signal, measure, and then reach the hyperacoustic object of detection.
Above-mentioned piezoelectric sensor is subject to electromagnetic interference (EMI) and is not suitable for the environment such as high temperature, inflammable, corrosion, simultaneously due to the impact of the factor such as volume, quality, be difficult to use under severe, narrow and small environment, and detection sensitivity is not high enough, brings inconvenience to application.In addition, use piezoelectric sensing probe to carry out single-point detection, can not multimetering be realized.
Summary of the invention
An object of the present invention is to provide the Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment, this detection system is convenient to application, be not subject to such environmental effects especially not easily by electromagnetic interference influence, environmental suitability is strong and detection sensitivity is high, and can carry out multimetering to electrical equipment.
Above-mentioned purpose of the present invention realizes by following technical solution: the Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment, it is characterized in that: this detection system comprises tunable laser, photo-coupler, Fiber Bragg Grating, photoelectric commutator and digital oscilloscope, described Fiber Bragg Grating is used for mutually bonding with electrical equipment to be detected, described photo-coupler respectively with tunable laser, Fiber Bragg Grating is connected with photoelectric commutator, described photoelectric commutator is connected with digital oscilloscope, the light that tunable laser sends certain wavelength imports in Fiber Bragg Grating after photo-coupler, Fiber Bragg Grating reflectance spectrum is transferred in photoelectric commutator through photo-coupler again, the light signal of reception is changed into voltage signal by photoelectric commutator, and shown by digital oscilloscope, if electrical equipment generation shelf depreciation, then can produce ultrasound wave vibration interference to Fiber Bragg Grating, the reflection wave wave length shift causing Fiber Bragg Grating to export, be transferred to through photo-coupler the voltage signal causing digital oscilloscope to show after photoelectric commutator more also to change thereupon, the waveform change shown by digital oscilloscope can obtain whether have ultrasonic signal, thus judge whether electrical equipment exists shelf depreciation.
The present invention introduces Fiber Bragg Grating (english abbreviation of Fiber Bragg Grating is FBG) and measures the ultrasonic signal that electrical equipment generation shelf depreciation produces, compared with its piezoelectric sensor, its light weight, good environmental adaptability, sensing range is wide and can arrange multiple measurement grid region for different parameters on an optical fiber, realizes multiple spot or quasi-distributed real-time ultrasound ripple signal monitoring.Therefore, it is that the limitation breaking through traditional electrical class sensor detecting provides new thinking that optical fiber grating sensing detects ultrasonic technology, in electrical network local discharge of electrical equipment on-line checkingi, have good application prospect.
In the present invention, the grid region length of described Fiber Bragg Grating is 1mm.
In the present invention, described Fiber Bragg Grating is mutually bonding with the surface of electrical equipment to be detected by glue.
Electrical equipment in the present invention refers to gas-insulated switch (Gas Insulated Switchgear, be called for short GIS), Ultrasonic Detection is carried out to its shelf depreciation, also can promote the use of other electrical equipment and carry out shelf depreciation Ultrasonic Detection, there is identical technique effect.
Two of object of the present invention is to provide the Fiber Bragg Grating ultrasonic detection method detected for electrical network local discharge of electrical equipment, and this detection method is easy to operate, and the testing result obtained is accurate.
Above-mentioned purpose of the present invention realizes by following technical solution: the Fiber Bragg Grating ultrasonic detection method detected for electrical network local discharge of electrical equipment, it is characterized in that, this detection method comprises the steps:
(1) respectively tunable laser, photo-coupler, Fiber Bragg Grating, photoelectric commutator and digital oscilloscope are connected, wherein Fiber Bragg Grating is mutually bonding with electrical equipment surface to be detected, photo-coupler is connected with photoelectric commutator with tunable laser, Fiber Bragg Grating respectively, and photoelectric commutator is connected with digital oscilloscope;
(2) tunable laser is opened, the light that tunable laser is sent imports in Fiber Bragg Grating through photo-coupler, Fiber Bragg Grating reflectance spectrum is transferred in photoelectric commutator through photo-coupler again, light signal is changed into voltage signal by photoelectric commutator, and is shown by digital oscilloscope;
(3) if electrical equipment generation shelf depreciation, the voltage signal that then digital oscilloscope can be caused to show also changes thereupon, the waveform change shown by digital oscilloscope can obtain whether have ultrasonic signal, thus judges whether electrical equipment exists shelf depreciation.
Compared with prior art, Fiber Bragg Grating is utilized to carry out ultrasonic signal detection to the ultrasound wave that electrical equipment generation shelf depreciation produces, core is the electric signal that measurement light intensity signal transforms through photoelectric commutator (english abbreviation of photoelectric commutator is PD), there is good advance, highly sensitive, ultrasonic signal can be detected in real time, and electromagnetism interference, stable performance.If series connection grid region or multiple spot arrange that fiber grating can also realize distributed measurement, improve and measure efficiency, there is application prospect widely.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Fig. 1 is the one-piece construction block diagram of detection system of the present invention;
Fig. 2 is without oscillogram during ultrasonication in detection system of the present invention, wherein horizontal ordinate represents wavelength, unit is (nm), and ordinate represents light intensity, is perunit value, without unit, without ultrasonication, FBG reflectance spectrum is not drifted about, when namely centre wavelength is constant, the laser of specific wavelength, enters the light intensity magnitude of FBG back reflection light through coupling mechanism;
Fig. 3 is oscillogram when having ultrasonication in detection system of the present invention, wherein horizontal ordinate represents wavelength, unit is (nm), and ordinate represents light intensity, is perunit value, without unit, there is ultrasonication, cause FBG reflectance spectrum to be drifted about, when namely centre wavelength changes, the laser of specific wavelength, enters the light intensity magnitude of FBG back reflection light through coupling mechanism.
Description of reference numerals
1, tunable laser; 2, photo-coupler; 3, Fiber Bragg Grating;
4, photoelectric commutator; 5, digital oscilloscope; 6, electrical equipment
Embodiment
The Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment as shown in Figure 1, electrical equipment in the present embodiment is gas-insulated switch, this detection system comprises tunable laser 1, photo-coupler 2, Fiber Bragg Grating 3, photoelectric commutator 4 and digital oscilloscope 5, the grid region length of Fiber Bragg Grating 3 is 1mm, Fiber Bragg Grating 3 is for mutually bonding with electrical equipment 6 to be detected, and specifically Fiber Bragg Grating 3 is mutually bonding with the surface of electrical equipment 6 to be detected by glue.
In the present embodiment, tunable laser 1 is set to 1548.495nm, it is 1mm that Fiber Bragg Grating 3 chooses grid region length, centre wavelength is 1550.05nm, the similar sine wave of digital oscilloscope 5 display waveform, frequency is 65kHz, and amplitude is about 40mV, the ultrasound wave that electrical equipment generation shelf depreciation produces can be detected, ultrasound wave predominant frequency is about 60kHz.
Photo-coupler 2 respectively with tunable laser 1, Fiber Bragg Grating 3 is connected with photoelectric commutator 4, photoelectric commutator 4 is connected with digital oscilloscope 5, the light that tunable laser 1 sends certain wavelength imports in Fiber Bragg Grating 3 after photo-coupler 2, Fiber Bragg Grating 3 reflectance spectrum is transferred in photoelectric commutator 4 through photo-coupler 2 again, the light signal of reception is changed into voltage signal by photoelectric commutator 4, and shown by digital oscilloscope 5, if there is shelf depreciation in electrical equipment 6, then can produce ultrasound wave vibration interference to Fiber Bragg Grating 3, cause the reflection wave wave length shift that Fiber Bragg Grating 3 exports, be transferred to through photo-coupler 2 voltage signal causing digital oscilloscope 5 to show after photoelectric commutator 4 more also to change thereupon, the waveform change shown by digital oscilloscope 5 can obtain whether have ultrasonic signal, thus judge whether electrical equipment 6 exists shelf depreciation.
The principle of work of said detecting system is that the light of the specific wavelength that tunable laser sends imports in FBG through photo-coupler, FBG reflectance spectrum through coupler transfer in photoelectric commutator, light signal is changed into voltage signal by photoelectric commutator, is shown by digital oscilloscope.When ul-trasonic irradiation is in time being pasted onto the 1mmFBG of surface of aluminum plate, the perturbation that fiber grating is vibrated, its reflection wave wavelength exported drifts about within the specific limits, thus cause the voltage signal of oscilloscope display also to change thereupon, the ultrasound wave that electrical equipment generation shelf depreciation produces can be detected.The wavelength that usual electrical equipment generation shelf depreciation produces all can detect at the ultrasound wave of 20 ~ 230KHz.
Fig. 2 and Fig. 3 is the oscillogram not having ultrasonication in detection system of the present invention and have ultrasonication, comparison diagram 2 and Fig. 3 known, before and after ultrasonication, light intensity magnitude changes, and light intensity signal is converted to after voltage signal through photodetector, and the voltage signal of oscilloscope display will change.The similar sinusoidal signal of ultrasonic signal, again because optical maser wavelength is set in the best region of the reflectance spectrum linearity of FBG, therefore the similar sinusoidal signal of oscilloscope display voltage signal, identical with ultrasonic signal frequencies, and ultrasonic signal intensity is larger, to survey voltage signal magnitude larger.Finally, by analyzing frequency and the amplitude of the voltage signal shown by oscillograph, can judge whether ultrasonic signal to be detected, and then whether diagnostic device there is shelf depreciation.And pass through frequency and the amplitude of the voltage signal analyzed shown by oscillograph, judge whether to detect ultrasonic signal, and then whether diagnostic device shelf depreciation occurs, these are all common practise of those skilled in the art.
The wavelength that tunable laser sends needs the reflectance spectrum of the FBG after according to stickup to determine, the numerical value do not determined.The ultrasound information that shelf depreciation produces, similar sine wave, has certain frequency and amplitude, and frequency range is usually at 20-230kHz.
Electrical equipment in the present embodiment refers to gas-insulated switch, carries out Ultrasonic Detection to its shelf depreciation, also can promote the use of other electrical equipment and carry out shelf depreciation Ultrasonic Detection, have identical technique effect.Detection system of the present invention based on fiber bragg gratings sensing technology, can electromagnetism interference, can fix a point, multimetering, can effectively be applied in the ultrasound examination of power equipment shelf depreciation.
The present invention also discloses the Fiber Bragg Grating ultrasonic detection method detected for electrical network local discharge of electrical equipment, this detection method comprises the steps:
(1) respectively tunable laser 1, photo-coupler 2, Fiber Bragg Grating 3, photoelectric commutator 4 and digital oscilloscope 5 are connected, wherein Fiber Bragg Grating 3 is mutually bonding with electrical equipment 6 surface to be detected, photo-coupler 2 is connected with photoelectric commutator 4 with tunable laser 1, Fiber Bragg Grating 3 respectively, and photoelectric commutator 4 is connected with digital oscilloscope 5;
(2) tunable laser 1 is opened, the light that tunable laser 1 is sent imports in Fiber Bragg Grating 3 through photo-coupler 2, Fiber Bragg Grating 3 reflectance spectrum is transferred in photoelectric commutator 4 through photo-coupler 2 again, light signal is changed into voltage signal by photoelectric commutator 4, and is shown by digital oscilloscope 5;
(3) if shelf depreciation occurs electrical equipment 6, the voltage signal that then digital oscilloscope 5 can be caused to show also changes thereupon, the waveform change shown by digital oscilloscope 5 can obtain whether have ultrasonic signal, thus judges whether electrical equipment 6 exists shelf depreciation.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited thereto; all this kind is according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.
Claims (5)
1. for the Fiber Bragg Grating ultrasonic wave detecting system of electrical network local discharge of electrical equipment detection, it is characterized in that: this detection system comprises tunable laser, photo-coupler, Fiber Bragg Grating, photoelectric commutator and digital oscilloscope, described Fiber Bragg Grating is used for mutually bonding with electrical equipment to be detected, described photo-coupler respectively with tunable laser, Fiber Bragg Grating is connected with photoelectric commutator, described photoelectric commutator is connected with digital oscilloscope, the light that tunable laser sends certain wavelength imports in Fiber Bragg Grating after photo-coupler, Fiber Bragg Grating reflectance spectrum is transferred in photoelectric commutator through photo-coupler again, the light signal of reception is changed into voltage signal by photoelectric commutator, and shown by digital oscilloscope, if electrical equipment generation shelf depreciation, then can produce ultrasound wave vibration interference to Fiber Bragg Grating, the reflection wave wave length shift causing Fiber Bragg Grating to export, be transferred to through photo-coupler the voltage signal causing digital oscilloscope to show after photoelectric commutator more also to change thereupon, the waveform change shown by digital oscilloscope can obtain whether have ultrasonic signal, thus judge whether electrical equipment exists shelf depreciation.
2. the Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment according to claim 1, is characterized in that: the grid region length of described Fiber Bragg Grating is 1mm.
3. the Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment according to claim 1, is characterized in that: described Fiber Bragg Grating is mutually bonding with the surface of electrical equipment to be detected by glue.
4. the Fiber Bragg Grating ultrasonic wave detecting system detected for electrical network local discharge of electrical equipment according to claim 1, is characterized in that: described electrical equipment refers to gas-insulated switch.
5., for the Fiber Bragg Grating ultrasonic detection method that electrical network local discharge of electrical equipment detects, it is characterized in that, this detection method comprises the steps:
(1) respectively tunable laser, photo-coupler, Fiber Bragg Grating, photoelectric commutator and digital oscilloscope are connected, wherein Fiber Bragg Grating is mutually bonding with electrical equipment surface to be detected, photo-coupler is connected with photoelectric commutator with tunable laser, Fiber Bragg Grating respectively, and photoelectric commutator is connected with digital oscilloscope;
(2) tunable laser is opened, the light that tunable laser is sent imports in Fiber Bragg Grating through photo-coupler, Fiber Bragg Grating reflectance spectrum is transferred in photoelectric commutator through photo-coupler again, light signal is changed into voltage signal by photoelectric commutator, and is shown by digital oscilloscope;
(3) if electrical equipment generation shelf depreciation, the voltage signal that then digital oscilloscope can be caused to show also changes thereupon, the waveform change shown by digital oscilloscope can obtain whether have ultrasonic signal, thus judges whether electrical equipment exists shelf depreciation.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808125A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | System for detecting local discharge in transformer oil on basis of fiber Bragg grating |
| CN105241586A (en) * | 2015-11-26 | 2016-01-13 | 云南电网有限责任公司电力科学研究院 | Coil electrodynamic force simulation test system |
| CN105352583A (en) * | 2015-11-30 | 2016-02-24 | 华南师范大学 | Optical method, device and application for measuring supersonic wave sound pressure and sound intensity |
| 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 |
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN109725242A (en) * | 2019-03-14 | 2019-05-07 | 深圳供电局有限公司 | Single-core cable local discharge sensor and local discharge sensor array |
| CN112595945A (en) * | 2021-01-05 | 2021-04-02 | 西安理工大学 | FBG temperature compensation optical fiber partial discharge detection device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030141440A1 (en) * | 2002-01-28 | 2003-07-31 | Ices Co., Ltd. | Multi-type fiber bragg grating sensor system |
| WO2004113830A1 (en) * | 2003-06-17 | 2004-12-29 | National Institute Of Advanced Industrial Science And Technology | Strain and ae measurement device using optical fiber sensor |
| CN102323527A (en) * | 2011-09-09 | 2012-01-18 | 北京航空航天大学 | Power transformer partial discharge detection system and method based on fiber bragg grating |
| US20130008253A1 (en) * | 2010-03-18 | 2013-01-10 | National Institute Of Advanced Industrial Science And Technology | Fbg vibration detection system, apparatus and vibration detection method using the system |
| CN103472378A (en) * | 2013-09-24 | 2013-12-25 | 国家电网公司 | Partial discharge detecting system for all-fiber power transformer and detecting method thereof |
| CN203479973U (en) * | 2013-09-24 | 2014-03-12 | 国家电网公司 | Partial discharge detecting system for all-fiber power transformer |
| CN204359896U (en) * | 2014-12-10 | 2015-05-27 | 广东电网有限责任公司电力科学研究院 | For the Fiber Bragg Grating ultrasonic wave detecting system that electrical network local discharge of electrical equipment detects |
-
2014
- 2014-12-10 CN CN201410753810.4A patent/CN104360254A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030141440A1 (en) * | 2002-01-28 | 2003-07-31 | Ices Co., Ltd. | Multi-type fiber bragg grating sensor system |
| WO2004113830A1 (en) * | 2003-06-17 | 2004-12-29 | National Institute Of Advanced Industrial Science And Technology | Strain and ae measurement device using optical fiber sensor |
| US20130008253A1 (en) * | 2010-03-18 | 2013-01-10 | National Institute Of Advanced Industrial Science And Technology | Fbg vibration detection system, apparatus and vibration detection method using the system |
| CN102323527A (en) * | 2011-09-09 | 2012-01-18 | 北京航空航天大学 | Power transformer partial discharge detection system and method based on fiber bragg grating |
| CN103472378A (en) * | 2013-09-24 | 2013-12-25 | 国家电网公司 | Partial discharge detecting system for all-fiber power transformer and detecting method thereof |
| CN203479973U (en) * | 2013-09-24 | 2014-03-12 | 国家电网公司 | Partial discharge detecting system for all-fiber power transformer |
| CN204359896U (en) * | 2014-12-10 | 2015-05-27 | 广东电网有限责任公司电力科学研究院 | For the Fiber Bragg Grating ultrasonic wave detecting system that electrical network local discharge of electrical equipment detects |
Non-Patent Citations (3)
| Title |
|---|
| 吴延坤等: "光学方法在电力电缆局部放电测量中的研究现状", 《电网与清洁能源》 * |
| 李成榕等: "光纤布喇格光栅传感器应用于电气设备监测的研究进展", 《中国电机工程学报》 * |
| 杜剑波等: "光纤传感技术在变压器状态检测中的应用研究", 《电力系统保护与控制》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808125A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | System for detecting local discharge in transformer oil on basis of fiber Bragg grating |
| CN104808125B (en) * | 2015-05-04 | 2018-05-25 | 华北电力大学 | Partial discharge detecting system in transformer oil based on Fiber Bragg Grating |
| CN105241586A (en) * | 2015-11-26 | 2016-01-13 | 云南电网有限责任公司电力科学研究院 | Coil electrodynamic force simulation test system |
| CN105352583A (en) * | 2015-11-30 | 2016-02-24 | 华南师范大学 | Optical method, device and application for measuring supersonic wave sound pressure and sound intensity |
| 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 |
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN109725242A (en) * | 2019-03-14 | 2019-05-07 | 深圳供电局有限公司 | Single-core cable local discharge sensor and local discharge sensor array |
| CN112595945A (en) * | 2021-01-05 | 2021-04-02 | 西安理工大学 | FBG temperature compensation optical fiber partial discharge detection device and method |
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Application publication date: 20150218 |