CN114609494A - GIL partial discharge optical fiber sensing system - Google Patents
GIL partial discharge optical fiber sensing system Download PDFInfo
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- CN114609494A CN114609494A CN202210512702.2A CN202210512702A CN114609494A CN 114609494 A CN114609494 A CN 114609494A CN 202210512702 A CN202210512702 A CN 202210512702A CN 114609494 A CN114609494 A CN 114609494A
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- 230000000737 periodic effect Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 230000035945 sensitivity Effects 0.000 claims description 12
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- 230000002045 lasting effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- FBPFZTCFMRRESA-NQAPHZHOSA-N Sorbitol Chemical compound OCC(O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-NQAPHZHOSA-N 0.000 claims description 2
- 235000010356 sorbitol Nutrition 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000004927 fusion Effects 0.000 abstract description 4
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A GIL partial discharge optical fiber sensing system can realize distributed partial discharge ultrasonic sensing on GIL and comprises tunable laser, a circulator, a phase-shift fiber bragg grating sensing element array, a photoelectric detector, a data acquisition card, an upper computer, a basin-type insulator and an optical fiber jumper. The phase-shifting fiber bragg grating and the GIL basin-type insulators are installed in a fusion mode, the sensing system supports partial discharge ultrasonic signal measurement at 461 GIL basin-type insulators to the maximum extent, time division multiplexing is carried out on the sensing element array in a signal period in which the tunable laser source emits periodic stepped frequency conversion signals, partial discharge ultrasonic signals in the GIL are obtained by obtaining the amplitude change conditions of optical signals with all stepped wavelengths, the number of the sensors capable of being monitored is further increased by exerting the advantage that the optical fiber sensing technology is used for long-distance detection, and the distributed detection task of partial discharge of the GIL is favorably completed.
Description
Technical Field
The invention belongs to the technical field of optical sensing systems, and particularly relates to a GIL partial discharge optical fiber sensing system.
Background
As a novel power transmission mode, a gas insulated metal enclosed transmission line (GIL) has the advantages of large transmission capacity, small transmission loss, high safety performance, small environmental damage and the like, and is widely applied to the fields of special geographic environments and large-capacity long-distance power transmission. A large number of basin-type insulators are needed in the GIL, and the basin-type insulators are weak insulation parts of the GIL, so that once partial discharge occurs, if the partial discharge is not found in time, serious consequences of harming the operation safety of a power system may occur.
The early-stage partial discharge of the GIL basin-type insulator part is found by using a partial discharge acoustic wave detection sensing means, so that the occurrence of an insulation accident can be prevented. The traditional local discharge acoustic wave method mainly uses a piezoelectric ceramic (PZT) sensor, and the PZT sensor is tightly attached to the outside of the GIL to detect the acoustic wave generated by the local discharge. The method is simple and convenient to operate, mature in technology, low in sensitivity, difficult to reuse and long in time consumption of single-point sequential measurement.
In recent years, with the development of interdisciplinary studies, fiber acoustic wave sensing technology has received attention from researchers. Compared with a PZT sensor, the optical fiber ultrasonic sensor has the advantages of good insulating property, excellent anti-electromagnetic interference property, high sensitivity and good multiplexing property, and is more suitable for detecting GIL partial discharge ultrasonic signals.
Through retrieval, the chinese patent publication No. CN 111505468B discloses an optical fiber distributed partial discharge detection system, which includes an optical fiber sensing system based on Michelson interference, a fast optical switch, an optical switch controller, a mandrel type optical fiber sensing unit, and an insulator surrounding type optical fiber sensing unit, wherein one input port of the fast optical switch corresponds to a plurality of output ports, and the optical fiber sensing system based on Michelson interference performs time division multiplexing on the plurality of optical fiber sensing units through the fast optical switch to realize distributed sensing measurement; according to the method, each sensing element needs to be controlled by an independent optical fiber, so that when side points are increased, an optical path is too complex, and field arrangement is not facilitated; and the number of optical switch channels is limited, which further limits the number of measurement points.
Through retrieval, chinese patent publication No. CN 108303626 a discloses a partial discharge ultrasonic measurement system and method based on a distributed optical fiber sensing array, including a pulse light source, a demultiplexing module, an interferometer demodulation module, a pulse light source, a power separation module, an optical fiber sensing array and a power synthesis module. The output signal contains the waveform and spectrum information of the ultrasonic signal, and the position information of the sensor disturbed by the ultrasonic wave in the optical fiber sensing array can be identified. However, the multiplexing structure of the interference structure is complex, the required sensing optical fiber is long, and the method is not suitable for GIL fusion installation.
In view of the above, it is necessary to provide an optical fiber sensing system suitable for GIL partial discharge sensing. And realizing distributed sensing of GIL partial discharge while the sensor and the GIL are installed in a fusion manner.
Disclosure of Invention
A GIL partial discharge optical fiber sensing system can realize distributed partial discharge ultrasonic sensing on GIL and comprises tunable laser, a circulator, a phase-shift fiber bragg grating sensing element array, a photoelectric detector, a data acquisition card, an upper computer, a basin-type insulator and an optical fiber jumper.
The phase-shifting fiber grating sensing element array is formed by connecting a plurality of phase-shifting fiber grating sensing elements in series.
The phase-shift fiber grating sensing element is a phase-shift fiber grating with phase shift amount of pi formed by writing a grating on a section of single-mode fiber by using a phase-shift mask method. 1 extremely narrow transmission region exists in a reflection spectrum of the phase-shifting fiber bragg grating, the half-wave width of the transmission region is less than 0.01nm, when the wavelength of incident light is positioned at the maximum point of the spectral slope of the transmission region, the sensitivity of a sensing system is maximum, and the wavelength of the incident light is called as the wavelength of a working point with the highest reflection sensitivity; the wavelength of the operating point with the highest reflection sensitivity of the phase-shift fiber grating can be adjusted by adjusting the refractive index of the fiber core of the phase-shift fiber grating and the period length of the grating region.
The two ends of the phase-shift fiber grating sensing element are respectively welded with an FC/APC fiber joint, and the welding loss is less than 0.2 dB; the different phase-shifting fiber bragg grating sensing elements are connected through optical fiber jumpers;
the photoelectric detector is a Sorbo PDA10CF-EC photoelectric detector and is used for converting optical signals in a sensing system into electric signals, and the detection bandwidth DC can reach 150 MHz.
The tunable laser source adopts a Santec TSL-710 tunable laser source, the wavelength adjusting range is 1330-1560 nm, and the wavelength adjusting precision is 2 pm; the tunable laser source emits a periodic stepped frequency converted signal with a starting wavelength of 1330nm, which is then stepped up in 0.5nm increments, with the optical signal at each step lasting 20 ms until the wavelength is increased to an ending wavelength of 1560 nm. The tunable laser source emits periodic stepped frequency conversion signals with 461 stepped wavelengths, and the period of the periodic stepped frequency conversion signals is 9.22 s.
The wavelengths of the working points with the highest reflection sensitivity of the phase-shifting fiber grating sensing elements in the phase-shifting fiber grating sensing element array are different from each other, and the collection of the working points with the highest reflection sensitivity of the phase-shifting fiber grating sensing elements is a subset of 461 step wavelength collections emitted by the tunable laser source, so that the phase-shifting fiber grating sensing element array supports the serial connection of 461 phase-shifting fiber grating sensing elements at most.
The basin-type insulator is used for connecting the two GIL cavities, a through hole with the diameter of 1cm is formed in the top of the basin-type insulator and used for embedding the phase-shift fiber grating sensing element, the FC/APC fiber connector and the through hole form a sealed space, and the sealed space is filled with the ultrasonic coupling agent.
And performing time division multiplexing on all phase-shifting fiber grating sensing elements of the phase-shifting fiber grating sensing element array in one period of a periodic stepped frequency conversion signal emitted by a tunable laser source, and obtaining partial discharge ultrasonic signals of all basin-type insulator parts in the GIL by obtaining the amplitude change conditions of optical signals with all stepped wavelengths.
The invention has the beneficial effects that: a GIL partial discharge optical fiber sensing system is provided, a phase-shift optical fiber grating sensing element and GIL basin-type insulators are installed in a fusion mode, the sensing system supports partial discharge ultrasonic signal measurement at 461 GIL basin-type insulators to the maximum extent, time division multiplexing is carried out on a sensing element array in a signal period in which a tunable laser source sends out periodic stepped frequency conversion signals, partial discharge ultrasonic signals of all basin-type insulators in the GIL are obtained by obtaining amplitude change conditions of optical signals with all stepped wavelengths, the number of the sensors capable of being monitored is further increased on the basis of exerting the advantage that an optical fiber sensing technology is used for long-distance detection, and the distributed detection task of partial discharge of the GIL is favorably completed.
Drawings
FIG. 1 is a schematic diagram of a GIL partial discharge fiber sensing system.
Fig. 2 is a schematic diagram of a phase-shifted fiber grating sensor element.
Fig. 3 is a front view of the basin insulator.
Fig. 4 is a cross-sectional view of a basin insulator.
FIG. 5 is a schematic diagram of a GIL with phase-shifted fiber grating sensor cells installed.
FIG. 6 is a schematic diagram of a periodic stepped frequency-variable signal emitted by a tunable laser source.
Wherein: 1 is a tunable laser source; 2 is a circulator; 3 is a phase-shift fiber grating sensing element; 4 is a phase-shift fiber grating sensing element array; 5 is a photoelectric detector; 6 is a data acquisition card; 7 is an upper computer; 8 is FC/APC optical fiber joint; 9 is a phase-shift fiber grating; 10 is a basin-type insulator; 11 is a through hole; 12 is GIL; and 13 is an optical fiber jumper.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, 2, 3 and 4, an embodiment of the present invention provides a GIL partial discharge optical fiber sensing system, which includes a tunable laser source 1, a circulator 2, a phase-shift fiber grating sensing element array 4, a photodetector 5, a data acquisition card 6, an upper computer 7, a basin-type insulator 10 and an optical fiber jumper 13.
Referring to fig. 1, light emitted by a tunable laser source enters through a port of a circulator 2, then enters a phase-shift fiber grating sensing element array 4 through a port of the circulator 2, light reflected by the phase-shift fiber grating sensing element array 4 enters a photoelectric detector 5 through the port and the port of the circulator 2, an optical signal is converted into an electric signal and then received by a data acquisition card 6, and finally the electric signal is sent to an upper computer 7 for data processing.
Referring to fig. 2, the phase shift fiber grating sensing element 3 of the present invention is a phase shift fiber grating 9 with a phase shift amount of pi formed by writing a grating on a section of single mode fiber by using a phase shift mask method; and two ends of the phase-shift fiber grating sensing element 3 are respectively welded with an FC/APC fiber joint 8, and the welding loss is less than 0.2 dB.
Referring to fig. 3 and 4, a through hole 11 with a diameter of 1cm is formed at the top of the basin-type insulator 10 and used for embedding the phase shift fiber grating sensing element 3, the FC/APC fiber connector 8 and the through hole 11 form a sealed space, and the sealed space is filled with the ultrasonic coupling agent.
Referring to fig. 5, the basin-type insulator 10 is used for supporting the GIL guide rod and connecting the cavity, and the phase-shift fiber grating sensing elements 3 of different basin-type insulators 10 are connected in series through fiber jumpers 13.
Referring to FIG. 6, the tunable laser source emits a periodic stepped frequency converted signal with a starting wavelength of 1330nm, followed by stepped increases in 0.5nm increments with the optical signal at each step lasting 20 ms until the wavelength increases to the ending wavelength 1560 nm. The tunable laser source emits periodic stepped frequency conversion signals with 461 stepped wavelengths, and the period is 9.22 s.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the wavelengths of the operating points with the highest reflection sensitivities of the phase-shifted fiber grating sensing elements 3 in the phase-shifted fiber grating sensing element array 4 are different from each other, and the collection of the wavelengths of the operating points with the highest reflection sensitivities of the phase-shifted fiber grating sensing elements 3 is a subset of the collection of 461 stepped wavelengths emitted by the tunable laser source 1, so that the phase-shifted fiber grating sensing element array 4 supports the series connection of the 461 phase-shifted fiber grating sensing elements 3 at maximum, and the sensing system supports the partial discharge ultrasonic signal measurement at the 461 basin insulators 10 in the GIL 12 at maximum.
Referring to fig. 1, 2, 3, 4, 5 and 6, all phase-shifted fiber grating sensor elements 3 of the phase-shifted fiber grating sensor element array 4 are time-division multiplexed during one period of the periodic stepped frequency-converted signal emitted by the tunable laser source 1,
Taking the 20ms time of 1330nm wavelength light emitted from the tunable laser source 1 as an example, in this time period, only the phase-shifted fiber grating sensor element 3 with the highest reflection sensitivity and the operating point wavelength of 1330nm will reflect the light emitted from the tunable laser source 1, the other phase-shifting fiber grating sensing elements 3 can transmit the light emitted by the tunable laser source 1, when the phase-shifting fiber grating sensing elements 3 vibrate due to the sensing of the ultrasonic wave generated by the partial discharge, the light intensity reflected by the phase-shifting fiber grating sensing elements 3 can fluctuate, the fluctuation frequency is consistent with the ultrasonic frequency, and so on, the partial discharge ultrasonic signal in the GIL 12 is obtained by obtaining the amplitude variation of the optical signals of all the step wavelengths received by the photodetector 5, the distributed detection task of partial discharge of the GIL 12 can be completed by further increasing the number of the sensors which can be monitored on the basis of exerting the advantage of the optical fiber sensing technology used for long-distance detection.
Claims (3)
1. A GIL partial discharge optical fiber sensing system is characterized by comprising a tunable laser source (1), a circulator (2), a phase-shift fiber bragg grating sensing element array (4), a photoelectric detector (5), a data acquisition card (6), an upper computer (7), a basin-type insulator (10) and an optical fiber jumper (13), wherein,
The wavelength adjusting range of the tunable laser source (1) is 1330-1560 nm, and the wavelength adjusting precision is 2 pm; a tunable laser source (1) emits a periodic stepped frequency converted signal with a starting wavelength of 1330 nm, followed by a stepwise increase in wavelength in 0.5 nm increments, with the optical signal at each step wavelength lasting 20 ms until the wavelength increases to an ending wavelength of 1560 nm for one period; the periodic stepped frequency conversion signal emitted by the tunable laser source has 461 stepped wavelengths, and the period is 9.22 s;
the phase-shifting fiber grating sensing element array (4) is formed by connecting a plurality of phase-shifting fiber grating sensing elements (3) in series, the phase-shifting fiber grating sensing elements (3) are phase-shifting fiber gratings (9) with phase-shifting amount pi formed by writing gratings on a section of single-mode fiber by using a phase-shifting mask method, two ends of each phase-shifting fiber grating sensing element (3) are respectively welded with an FC/APC fiber connector (8), the welding loss is less than 0.2 dB, and the different phase-shifting fiber grating sensing elements (3) are connected through fiber jumpers (13);
the basin-type insulator (10) is used for connecting the two GIL cavities, a through hole (11) with the diameter of 1cm is formed in the top of the basin-type insulator and used for embedding the phase-shift fiber grating sensing element (3), the FC/APC fiber connector (8) and the through hole (11) form a sealed space, and an ultrasonic coupling agent is filled in the sealed space;
All the phase-shifting fiber grating sensing elements (3) of the phase-shifting fiber grating sensing element array (4) are subjected to time division multiplexing in a period of sending out periodic stepped frequency conversion signals by the tunable laser source (1), and partial discharge ultrasonic signals of all the basin-type insulators (10) in the GIL (12) are obtained by obtaining amplitude change conditions of optical signals of all stepped wavelengths detected by the photoelectric detector (5).
2. The GIL partial discharge fiber optic sensing system according to claim 1, wherein the wavelengths of the operating points with the highest reflection sensitivities of the individual phase-shifted fiber grating sensing elements (3) in said phase-shifted fiber grating sensing element array (4) are different from each other, and the collection of the wavelengths of the operating points with the highest reflection sensitivities of the phase-shifted fiber grating sensing elements (3) is a subset of the collection of 461 stepped wavelengths emitted from the tunable laser source (1); the GIL partial discharge optical fiber sensing system maximally supports partial discharge ultrasonic signal measurement at 461 basin-type insulators (10) in a GIL (12).
3. The GIL partial discharge fiber optic sensing system according to claim 1, wherein said photodetector (5) is a Sorbo PDA10CF-EC photodetector for converting optical signals in the sensing system into electrical signals with a detection bandwidth DC up to 150 MHz.
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| CN202210512702.2A CN114609494A (en) | 2022-05-12 | 2022-05-12 | GIL partial discharge optical fiber sensing system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202547766U (en) * | 2012-03-09 | 2012-11-21 | 桂林市光明科技实业有限公司 | Fiber bragg grating vibration sensing measurement system |
| 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 |
| WO2017015960A1 (en) * | 2015-07-30 | 2017-02-02 | 北京一纤百城光电科技有限公司 | Acoustic-emission-based health monitoring method and system |
| CN109387756A (en) * | 2018-12-13 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of partial discharge detecting system and method based on fiber grating |
| CN110297165A (en) * | 2019-06-20 | 2019-10-01 | 上海格鲁布科技有限公司 | A kind of GIL shelf depreciation positioning device based on optical fiber clock synchronization networking |
| CN111505468A (en) * | 2020-06-16 | 2020-08-07 | 华北电力大学 | Optical fiber distributed partial discharge detection system |
| CN111929552A (en) * | 2020-09-27 | 2020-11-13 | 中国电力科学研究院有限公司 | GIS basin-type insulator partial discharge detection assembly and system |
-
2022
- 2022-05-12 CN CN202210512702.2A patent/CN114609494A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202547766U (en) * | 2012-03-09 | 2012-11-21 | 桂林市光明科技实业有限公司 | Fiber bragg grating vibration sensing measurement system |
| 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 |
| WO2017015960A1 (en) * | 2015-07-30 | 2017-02-02 | 北京一纤百城光电科技有限公司 | Acoustic-emission-based health monitoring method and system |
| CN109387756A (en) * | 2018-12-13 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of partial discharge detecting system and method based on fiber grating |
| CN110297165A (en) * | 2019-06-20 | 2019-10-01 | 上海格鲁布科技有限公司 | A kind of GIL shelf depreciation positioning device based on optical fiber clock synchronization networking |
| CN111505468A (en) * | 2020-06-16 | 2020-08-07 | 华北电力大学 | Optical fiber distributed partial discharge detection system |
| CN111929552A (en) * | 2020-09-27 | 2020-11-13 | 中国电力科学研究院有限公司 | GIS basin-type insulator partial discharge detection assembly and system |
Non-Patent Citations (1)
| Title |
|---|
| 马国明等: "变压器局部放电光纤超声检测技术及新复用方法", 《高电压技术》 * |
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