CN1821795A - Method and its device for detecting discharge fault position of high voltage electric equipment - Google Patents
Method and its device for detecting discharge fault position of high voltage electric equipment Download PDFInfo
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- CN1821795A CN1821795A CNA2006100125248A CN200610012524A CN1821795A CN 1821795 A CN1821795 A CN 1821795A CN A2006100125248 A CNA2006100125248 A CN A2006100125248A CN 200610012524 A CN200610012524 A CN 200610012524A CN 1821795 A CN1821795 A CN 1821795A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
This invention relates to a method for testing discharge faulty positions for high voltage electric devices including utilizing a directional antenna to receive the magnetic wave signals radiated by the discharge part space, utilizing a directional piezoelectric wafer to receive the supersonic wave signals of the part, analyzing the amplitudes of electric and sonic signals and change of time differences by a data process circuit to determine the coordinates of X, Y and Z shafts so as to determine the position of the discharge. The invented detector is composed of a directional antenna, a piezoelectric wafer, an electric signal receiving circuit, a data process circuit and a display device.
Description
Technical field
The present invention relates to a kind of device that is used to detect the method for the discharge abort situation that high voltage electric equipment causes because of insulation harm and realizes this method, belong to the detection technique field.
Background technology
High voltage electric equipment is used very extensive in producing and living, shelf depreciation owing to there is insulation harm in mass defect or the operational process, can take place at these positions in a lot of high voltage electric equipments such as dry-type transformer, cable etc., quicken insulation degradation, form fault.The key of handling this type of problem is a fast detecting discharge position how, and does not still have simple and practical special technology at present or equipment is determined discharge position, makes maintenance, maintenance very difficult.Particularly only just can come out when high pressure because of this insulation fault, and under high pressure detect, detection instrument and operating personnel's safety becomes the obstacle that at first must solve again.Therefore designing and develop a kind of and equipment under test determine discharge position under contactless state method is the urgent task that the technician faces for the discharge fault of products such as fast detecting dry-type transformer, cable so that carry out on-call maintenance.
Summary of the invention
Technical matters to be solved by this invention provides a kind of method that can measure discharge fault position of high voltage electric equipment with equipment under test under contactless state quickly and accurately
Another problem that need solve of the present invention provides and is used to carry out the device that discharge fault position is surveyed.
The technical scheme that addresses the above problem is:
A kind of method of measuring discharge fault position of high voltage electric equipment, it adopts following steps:
To the high-frequency electromagnetic signal of space radiation, the high-frequency electromagnetic letter that receives is sent into amplification, the processing of elimination clutter that the electric signal receiving circuit carries out signal when a. utilizing directional antenna to receive high-tension apparatus generation discharge fault;
B. the electromagnetic signal after will handling is sent into data processing circuit, and the amplitude of electromagnetic signal is compared, and determines the power of electromagnetic signal;
C. the position of sending the strongest discharge electromagnetic signal is sought in the position of continuous mobile directional antenna, and this position is X, the Y coordinate of point of discharge;
To the ultrasonic signal of spatial transmission, the ultrasonic signal that receives is sent into amplification, the processing of elimination clutter that the ultrasonic signal receiving circuit carries out signal when d. utilizing piezoelectric chip to receive high-tension apparatus generation discharge fault;
E. the ultrasonic signal after will handling is sent into data processing circuit, ultrasonic signal is analyzed, the measuring and calculating antenna receives the mistiming of electromagnetic signal and ultrasonic signal, the speed of propagating in propagation medium according to sound is determined the vertical range of detector and discharge fault point, be Z axial coordinate numerical value, thereby determine the three-dimensional space position at discharge position.
Be isolated high-voltage better, in the method for said determination discharge fault position of high voltage electric equipment, accept to set up photoelectric isolating circuit between circuit and the data processing circuit at signal, is light signal by electro-optical conversioning device with electrical signal conversion, arrive the next stage electrooptical device by Optical Fiber Transmission again, be transformed to electric signal.
Another technical matters of the present invention realizes by following proposal:
A kind of discharge fault position of high voltage electric equipment detector, it is made up of directional antenna, piezoelectric chip, electric signal receiving circuit, ultrasonic signal receiving circuit, data processing circuit, display device, directional antenna is connected with the electric signal receiving circuit, piezoelectric chip is connected with the ultrasonic signal receiving circuit, the output termination data processing circuit of electric signal receiving circuit and ultrasonic signal receiving circuit, the signal output part of data processing circuit connects the demonstration transposition;
Described electric signal receiving circuit is connected to form successively by pre-amplification circuit, filtering circuit, back level amplifying circuit;
Described ultrasonic signal receiving circuit is connected to form successively by impedance inverter circuit, pre-amplification circuit, filtering circuit, back level amplifying circuit;
Described data processing circuit is made up of A/D converter, storer, CPU, and they connect successively, and the input end of A/D converter is connected with the output terminal of electric signal receiving circuit with the ultrasonic signal receiving circuit respectively.
Above-mentioned high voltage electric equipment discharge property abort situation detector, the pre-amplification circuit of described electric signal receiving circuit, filtering circuit, back level amplifying circuit are made up of transport and placing device U1, U2, U3, capacitor C 1, C2, C3, C4, inductance L 1, L2, transport and placing device U2 forms pre-amplification circuit, capacitor C 2, C3, inductance L 1, L2 form the worry wave circuit, and transport and placing device U3 forms back level amplifying circuit.
Above-mentioned high voltage electric equipment discharge property abort situation detector, the impedance inverter circuit of described ultrasonic signal receiving circuit, pre-amplification circuit, filtering circuit, back level amplifying circuit are made up of transport and placing device U5, U6, U7, U8, capacitor C 5, C6, C7, C8, inductance L 3, L4, transport and placing device U5 forms impedance inverter circuit, transport and placing device U6 forms pre-amplification circuit, capacitor C 6, C7, inductance L 3, L4 form filtering circuit, and transport and placing device U7 forms back level amplifying circuit.
Above-mentioned high voltage electric equipment discharge property abort situation detector, between the input end of the output terminal of electric signal receiving circuit and ultrasonic signal receiving circuit and A/D converter, be respectively equipped with photoelectric conversion circuit, photoelectric conversion circuit is made up of electrical to optical converter D1, D2 and photoelectric commutator D3, D4, electrical to optical converter D1, D2 are connected with the output terminal of electric signal receiving circuit with the ultrasonic signal receiving circuit respectively, photoelectric commutator D3, D4 are connected with the input end of A/D converter, are connected by optical fiber GX between electrical to optical converter D1, D2 and photoelectric commutator D3, the D4.
Above-mentioned high voltage electric equipment discharge property abort situation detector, described directional antenna and piezoelectric chip are encapsulated in the detecting head, and the front opening of detecting head is surrounded by metal shielding all around.
The present invention utilizes directional antenna to receive office's discharge magnetostatic wave signal of discharge part bit space radiation, utilize directed piezoelectric chip office of acceptance to put ultrasonic signal simultaneously, with the electricity that receives, acoustical signal after filtering, amplification etc. are handled, data processing circuit changed electricity, acoustical signal amplitude and the time difference to be analyzed, the power of wherein analyzing the electromagnetic signal that directional antenna receives can be determined X, the Y coordinate of point of discharge, the mistiming that the measuring and calculating antenna receives electromagnetic signal and ultrasonic signal can be determined the Z axial coordinate, thus the three-dimensional space position at the position of determining to discharge.The present invention is simple and practical, can determine the position of discharge fault quickly and accurately, and can accurately demonstrate the three-dimensional coordinate of point of discharge, is very easy to the detection maintenance job, and the safety assurance effect has been played in the normal operation of high voltage electric equipment.
Description of drawings
Fig. 1 is the electric theory diagram of detector of the present invention;
Fig. 2 is an electrical schematic diagram;
Fig. 3 is an operation chart;
Fig. 4 is that letter is led the processing main program flow chart.
Mark is as follows among the figure: directional antenna 1, piezoelectric chip 2, electric signal receiving circuit 3, ultrasonic signal receiving circuit 4, data processing circuit 5, photoelectric conversion circuit 6,7, pre-amplification circuit 8,9, filtering circuit 10,11, back level amplifying circuit 12,13, A/D converter 14,15, storer 16, CPU17, display device 18, impedance inverter circuit 19.
Embodiment
Detection principle of the present invention is, high-tension apparatus is when high-potting or operation, its voltage is generally all more than several thousand shapes, inherent vice may issue living electric charge in the high pressure field intensity and move and discharge, can be to the space radiation high frequency electromagnetic wave signal, can produce simultaneously ultrasonic signal to around along rectilinear propagation.Utilize embedded circular-oriented antenna to receive office's discharge magnetostatic wave signal of space radiation, utilize directed piezoelectric chip office of acceptance to put ultrasonic signal simultaneously, with electricity, acoustical signal after processing and amplifying, by data processing unit electricity, acoustical signal amplitude and time difference variation are analyzed, determine X, the Y coordinate of point of discharge by analyzing power that directional antenna receives electromagnetic signal, receive the mistiming of electromagnetic signal and ultrasonic signal by the measuring and calculating antenna, determine the Z axial coordinate, thereby determine the three-dimensional space position at discharge position.
In the present invention, the operator aims at detected high-tension apparatus with directional antenna, and the high frequency electromagnetic wave signal of the point of discharge radiation of receiving equipment, and the position of mobile directional antenna find the point of maximum intensity of received signal, determine X, the Y coordinate of this point.The mistiming of the electromagnetic signal that receives of ultrasonic signal that receives by piezoelectric chip and directional antenna is determined the Z coordinate of this point then, just can determine the exact position of point of discharge.
That Fig. 1,2,4 shows is an embodiment of detector of the present invention.
Directional antenna 1 is connected with electric signal receiving circuit 3, and electric signal receiving circuit 3 is connected successively by pre-amplification circuit 8, filtering circuit 10, back level amplifying circuit 12.Show among the figure that pre-amplification circuit 8 is made up of transport and placing device U2, filtering circuit 10 is made up of capacitor C 2, C3, inductance L 1, L2, and back level amplifying circuit 12 is made up of transport and placing device U3.
Piezoelectric chip 2 is connected with ultrasonic signal receiving circuit 4, and ultrasonic signal receiving circuit 4 is connected to form successively by impedance inverter circuit 19, pre-amplification circuit 9, filtering circuit 11, back level amplifying circuit 13.Show among the figure that impedance inverter circuit 19 is made up of transport and placing device U5, pre-amplification circuit 9 is made up of transport and placing device U6, and capacitor C 6, C7, inductance L 3, L4 form filtering circuit 11, and transport and placing device U7 forms the back level and receives big circuit 13.
The output termination data processing circuit 5 of electric signal receiving circuit 3 and ultrasonic signal receiving circuit 4, the signal output part of data processing circuit 5 connects display device 18.The A/D converter 14,15 of data processing circuit 5 is that U9, U10 chip, storer 16 is the U11 chip, and they connect successively, and the input end of A/D converter 14,15 is connected with the output terminal of electric signal receiving circuit 3 with ultrasonic signal receiving circuit 4 respectively.
Between the input end of the output terminal of electric signal receiving circuit 3 and ultrasonic signal receiving circuit 4 and A/D converter 14,15, be respectively equipped with photoelectric conversion circuit 6,7, photoelectric conversion circuit 6,7 is made up of electrical to optical converter D1, D2 and photoelectric commutator D3, D4 respectively, electrical to optical converter D1, D2 are connected with the output terminal of electric signal receiving circuit 3 with ultrasonic signal receiving circuit 4 respectively, photoelectric commutator D3, D4 are connected with the input end of A/D converter 14,15, are connected by optical fiber GX between electrical to optical converter D1, D2 and photoelectric commutator D3, the D4.
At work, the electromagnetic wave signal of discharge generation sensed by directional antenna 1 after transport and placing device U1 is transferred to the transport and placing device U2 of pre-amplification circuit 8, then by C2, L1, L2, C3 filtering, filtering external interference signal, after transport and placing device U3 amplifies once more, is light signal by electrical to optical converter D1 with electrical signal conversion, is transferred to photoelectric commutator D3 by optical fiber GX again, is transformed to electric signal.After piezoelectric chip 2 receives the ultrasonic signal of discharge generation, after transport and placing device U5 impedance conversion, be transferred to the transport and placing device U6 of pre-amplification circuit 9, signals of forming by C6, L3, L4, C7 such as filtering circuit 11 filtering external noises then, after transport and placing device U7 amplifies once more, is light signal by electrical to optical converter D2 with electrical signal conversion, is transferred to photoelectric commutator D4 by optical fiber GX again, is transformed to electric signal.The electric signal of electromagnetic wave signal and ultrasonic signal generation is delivered to high-speed a/d converter U9, U10 simultaneously and is converted to digital signal then, data are saved in the storer U11, CPU sense data in the storer U11, finish data processing after, result and Wave data are delivered to display lcd 1 show.
The present invention is respectively equipped with the photoelectric conversion circuit 6,7 that electrical to optical converter D1, D2 and photoelectric commutator D3, D4 form between the input end of the output terminal of electric signal receiving circuit 3 and ultrasonic signal receiving circuit 4 and A/D converter 14,15, middle by optical fiber GX connection, its effect is to carry out the isolated high-voltage electric signal and prevent extraneous spuious electromagnetic interference by optical fiber GX.
For detection is carried out easily, and guarantee accurate detectable signal, prevent the interference of extraneous clutter, the present invention is encapsulated in directional antenna 1 and piezoelectric chip 2 in the detecting head, and the front opening of detecting head is surrounded by metal shielding all around.
A/D converter among the present invention adopts the AD9220 high-speed a/d converter, and CPU adopts the LPC2106 chip.
Label YQ among Fig. 3 is a detector, and BC is an equipment under test, and GZ is the trouble spot.
Claims (7)
1. method of measuring discharge fault position of high voltage electric equipment, it is characterized in that: it adopts following steps:
To the high-frequency electromagnetic signal of space radiation, the high-frequency electromagnetic signal that receives is sent into amplification, the processing of elimination clutter that the electric signal receiving circuit carries out signal when a. utilizing directional antenna to receive high-tension apparatus generation discharge fault;
B. the electromagnetic signal after will handling is sent into data processing circuit, and the amplitude of electromagnetic signal is compared, and determines the power of electromagnetic signal;
C. the position of sending the strongest discharge electromagnetic signal is sought in the position of continuous mobile directional antenna, and this position is X, the Y coordinate of point of discharge;
D. utilize piezoelectric chip to receive the ultrasonic signal of high-tension apparatus generation discharge fault subtend spatial transmission, the ultrasonic signal that receives amplification, the elimination clutter that the ultrasonic signal receiving circuit carries out signal of making a gift to someone handled;
E. the data processing circuit of making a gift to someone of the ultrasonic signal after will handling, ultrasonic signal is analyzed, the measuring and calculating antenna receives the mistiming of electromagnetic signal and ultrasonic signal, the speed of propagating in propagation medium according to sound is determined the vertical range of detector and discharge fault point, be Z axial coordinate numerical value, thereby determine the three-dimensional space position at discharge position.
2. the method for mensuration discharge fault position of high voltage electric equipment according to claim 1, it is characterized in that: accept to set up photoelectric isolating circuit between circuit and the data processing circuit at signal, is light signal by electro-optical conversioning device with electrical signal conversion, arrive the next stage electrooptical device by Optical Fiber Transmission again, be transformed to electric signal.
3. probe of measuring discharge fault position of high voltage electric equipment, it is characterized in that: it is by directional antenna [1], piezoelectric chip [2], electric signal receiving circuit [3], ultrasonic signal receiving circuit [4], data processing circuit [5], display device [18] is formed, directional antenna [1] is connected with electric signal receiving circuit [3], piezoelectric chip [2] is connected with ultrasonic signal receiving circuit [4], the output termination data processing circuit [5] of electric signal receiving circuit [3] and ultrasonic signal receiving circuit [4], the signal output part of data processing circuit [5] connects display device [18];
Described electric signal receiving circuit [3] is connected to form successively by pre-amplification circuit [8], filtering circuit [10], back level amplifying circuit [12];
Described ultrasonic signal receiving circuit [4] is connected to form successively by impedance inverter circuit [19], pre-amplification circuit [9], filtering circuit [11], back level amplifying circuit [13];
Described data processing circuit [5] is by A/D converter [14], [15], storer [16], CPU[17] form, they connect successively, and the input end of A/D converter [14], [15] is connected with the output terminal of electric signal receiving circuit [3] with ultrasonic signal receiving circuit [4] respectively.
4. discharge fault position of high voltage electric equipment detector according to claim 3, it is characterized in that: the pre-amplification circuit [8] of described electric signal receiving circuit [3], filtering circuit [10], back level amplifying circuit [12] are made up of transport and placing device U1, U2, U3, capacitor C 1, C2, C3, C4, inductance L 1, L2, transport and placing device U2 forms pre-amplification circuit [8], capacitor C 2, C3, inductance L 1, L2 form filtering circuit [10], and transport and placing device U3 forms back level amplifying circuit [12].
5. discharge fault position of high voltage electric equipment detector according to claim 4, it is characterized in that: the impedance inverter circuit [19] of described ultrasonic signal receiving circuit [4], pre-amplification circuit [9], filtering circuit [11], back level amplifying circuit [13] are made up of transport and placing device U5, U6, U7, U8, capacitor C 5, C6, C7, C8, inductance L 3, L4, transport and placing device U5 forms impedance inverter circuit [20], transport and placing device U6 forms pre-amplification circuit [9], capacitor C 6, C7, inductance L 3, L4 form filtering circuit [11], and transport and placing device U7 forms back level amplifying circuit [13].
6. discharge fault position of high voltage electric equipment detector according to claim 5, it is characterized in that: at the output terminal and the A/D converter [14] of electric signal receiving circuit [3] and ultrasonic signal receiving circuit [4], [15] be respectively equipped with photoelectric conversion circuit [6] between the input end, [7], photoelectric conversion circuit [6], [7] by electrical to optical converter D1, D2 and photoelectric commutator D3, D4 forms, electrical to optical converter D1, D2 is connected with the output terminal of electric signal receiving circuit [3] with ultrasonic signal receiving circuit [4] respectively, photoelectric commutator D3, D4 and A/D converter [14], [15] input end is connected, electrical to optical converter D1, D2 and photoelectric commutator D3, connect by optical fiber GX between the D4.
7. discharge fault position of high voltage electric equipment detector according to claim 6 is characterized in that: described directional antenna [1] and piezoelectric chip [2] are encapsulated in the detecting head, and the front opening of detecting head is surrounded by metal shielding all around.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100125248A CN1821795A (en) | 2006-03-29 | 2006-03-29 | Method and its device for detecting discharge fault position of high voltage electric equipment |
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| CNA2006100125248A CN1821795A (en) | 2006-03-29 | 2006-03-29 | Method and its device for detecting discharge fault position of high voltage electric equipment |
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| CNA2006100125248A Pending CN1821795A (en) | 2006-03-29 | 2006-03-29 | Method and its device for detecting discharge fault position of high voltage electric equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706562B (en) * | 2009-09-08 | 2012-06-06 | 保定天威集团有限公司 | Calibration device of hand-held type local-discharge ultrasonic sensor |
| CN102539951A (en) * | 2010-10-18 | 2012-07-04 | 伊顿公司 | Acoustic sensor system, acoustic signature simulator, and electrical distribution system |
| CN102645573A (en) * | 2012-05-11 | 2012-08-22 | 西安电子科技大学 | Noncontact ultrahigh voltage electricity detector |
| CN103076542A (en) * | 2011-10-25 | 2013-05-01 | 章啸 | Partial discharge ultrasonic wave detection device |
| CN103134690A (en) * | 2011-11-23 | 2013-06-05 | 通用电气航空***有限责任公司 | Method for prognosing a health problem of an apparatus |
| CN104198894A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Cable digital display synchronous fixed point path instrument and fixed point method thereof |
| CN105230129A (en) * | 2013-05-21 | 2016-01-06 | 皇家飞利浦有限公司 | Lighting apparatus |
| CN105717432A (en) * | 2016-04-28 | 2016-06-29 | 广州供电局有限公司 | Partial discharge positioning device and method |
| CN109116196A (en) * | 2018-07-06 | 2019-01-01 | 山东科汇电力自动化股份有限公司 | A kind of power cable fault discharging sound intelligent identification Method |
| CN109581100A (en) * | 2018-11-16 | 2019-04-05 | 国网浙江海盐县供电有限公司 | Portable high-pressure equipment fault positioning device and its localization method |
| CN111308240A (en) * | 2020-02-26 | 2020-06-19 | 海盐南原电力工程有限责任公司 | High-voltage equipment sound fault detection device and detection method thereof |
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2006
- 2006-03-29 CN CNA2006100125248A patent/CN1821795A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706562B (en) * | 2009-09-08 | 2012-06-06 | 保定天威集团有限公司 | Calibration device of hand-held type local-discharge ultrasonic sensor |
| CN102539951A (en) * | 2010-10-18 | 2012-07-04 | 伊顿公司 | Acoustic sensor system, acoustic signature simulator, and electrical distribution system |
| CN102539951B (en) * | 2010-10-18 | 2016-04-20 | 伊顿公司 | Acoustic transducer system, acoustic feature simulator and electric distribution system |
| CN103076542A (en) * | 2011-10-25 | 2013-05-01 | 章啸 | Partial discharge ultrasonic wave detection device |
| CN103134690A (en) * | 2011-11-23 | 2013-06-05 | 通用电气航空***有限责任公司 | Method for prognosing a health problem of an apparatus |
| CN102645573B (en) * | 2012-05-11 | 2015-05-13 | 西安电子科技大学 | Noncontact ultrahigh voltage electricity detector |
| CN102645573A (en) * | 2012-05-11 | 2012-08-22 | 西安电子科技大学 | Noncontact ultrahigh voltage electricity detector |
| CN105230129A (en) * | 2013-05-21 | 2016-01-06 | 皇家飞利浦有限公司 | Lighting apparatus |
| CN104198894A (en) * | 2014-09-26 | 2014-12-10 | 国家电网公司 | Cable digital display synchronous fixed point path instrument and fixed point method thereof |
| CN105717432A (en) * | 2016-04-28 | 2016-06-29 | 广州供电局有限公司 | Partial discharge positioning device and method |
| CN105717432B (en) * | 2016-04-28 | 2019-12-10 | 广州供电局有限公司 | partial discharge positioning device and method |
| CN109116196A (en) * | 2018-07-06 | 2019-01-01 | 山东科汇电力自动化股份有限公司 | A kind of power cable fault discharging sound intelligent identification Method |
| CN109116196B (en) * | 2018-07-06 | 2020-09-25 | 山东科汇电力自动化股份有限公司 | Intelligent power cable fault discharge sound identification method |
| CN109581100A (en) * | 2018-11-16 | 2019-04-05 | 国网浙江海盐县供电有限公司 | Portable high-pressure equipment fault positioning device and its localization method |
| CN111308240A (en) * | 2020-02-26 | 2020-06-19 | 海盐南原电力工程有限责任公司 | High-voltage equipment sound fault detection device and detection method thereof |
| CN111308240B (en) * | 2020-02-26 | 2022-03-11 | 海盐南原电力工程有限责任公司 | High-voltage equipment sound fault detection device and detection method thereof |
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Open date: 20060823 |