CN202075374U - Sleeve end shield discharging ultrasonic detection device - Google Patents
Sleeve end shield discharging ultrasonic detection device Download PDFInfo
- Publication number
- CN202075374U CN202075374U CN2011201378550U CN201120137855U CN202075374U CN 202075374 U CN202075374 U CN 202075374U CN 2011201378550 U CN2011201378550 U CN 2011201378550U CN 201120137855 U CN201120137855 U CN 201120137855U CN 202075374 U CN202075374 U CN 202075374U
- Authority
- CN
- China
- Prior art keywords
- detection device
- bottom shielding
- bushing
- discharge
- supersonic detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000007599 discharging Methods 0.000 title abstract 3
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 230000003321 amplification Effects 0.000 claims abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 206010038743 Restlessness Diseases 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model provides a sleeve end shield discharging ultrasonic detection device, which comprises an ultrasonic receiver used for transiting received ultrasonic signals to analogue electric signals, an amplification circuit connected with the ultrasonic receiver and used for receiving the analogue electric signals for coupling and amplification, a filter circuit connected with the amplification circuit and used for carrying out bandpass filtering on amplified analogue electric signals, an analog/digital acquisition circuit connected with the filter circuit and used for converting the analogue electric signals to digital signals, a master control circuit connected with the analog/digital acquisition circuit and used for receiving digital signals and processing and a peripheral device for data input/output and storage. The device can conveniently determine if discharging exists at a high voltage sleeve end shield, thereby reducing electric power accidents and reducing economic loss and social influence.
Description
Technical field
The utility model relates to the electrical equipment malfunction diagnostic field, particularly the supersonic detection device of bottom shielding of bushing discharge.
Background technology
Bushing is a kind of extremely extensive and numerous element of using in electric system, plays the effect of High-Voltage Insulation and mechanical support, and is in the majority with condenser bushing at present.These capacitance type equipments, as sleeve pipe, the current transformer of paper oil insulation, insulation is to be rolled by insulating paper from level to level to form.Volume has the tinfoil paper layer between every layer of insulating paper, is called capacitance plate.This structure can make voltage be evenly distributed.Outermost one deck capacitance plate is called the end screen.Because the needs of electric power preventive trials such as dielectric loss measurement, capacitance measurement, pulse current method measurement of partial discharge, non-dead ground connection is shielded at the end of inside pipe casing, easily loose contact or disconnection problem occur at the ground connection place.In operation power, in case bottom shielding of bushing imperfect earth, last screen will produce higher floating potential, thereby cause the discharge over the ground of end screen.It is big especially that the discharge of this type just shows discharge capacity at initial period, the feature that discharge time is more, and produce higher heat.High energy, high heat discharge can further strengthen the gap between end screen and the earthing pole for a long time, finally can cause serious short circuit accident if develop as one pleases.In recent years, the electric power accident that bottom shielding of bushing imperfect earth causes is unrare, has been subjected to the attention of power industry relevant enterprise and mechanism.
Common instruments such as infrared thermoviewer, ultraviolet imagery instrument, type local-discharge ultrasonic pick-up unit are applied to bottom shielding of bushing discharge band electro-detection all limitation.Infrared imaging and temperature are closely related, and the bottom shielding of bushing discharge not necessarily is attended by tangible temperature rise, comparatively lag behind even if having also, and are subjected to environmental impacts such as season, weather big, and it is not enough to detect intuitive and accuracy.Bottom shielding of bushing discharge occurs in the metal shell, and ultraviolet imagery is difficult to the ultraviolet ray of diagnosing discharge to give off.The shelf depreciation supersonic detection device need be installed touch sensor at every inside pipe casing usually, and transmits signal by cable, complexity is installed, the cost height.
A kind of insulator contamination discharge ultrasonic monitoring method and apparatus is arranged in the prior art, adopted contactless ultrasonic monitoring method, handle judgement by the discharge ultrasonic signal that sonac is obtained, the situation of the filthy discharge of monitoring insulator surface.But the surface-discharge that the prior art only causes at insulator contamination, after revising, factors such as influence that can't be by shell being blocked, detects variable in distance, humidity effect, wind, atmospheric pressure influence obtain the accurate information of bottom shielding of bushing discharge, and this technology only is used for monitoring, does not realize the portable purposes of patrolling and examining.
In a word, also can intuitively not observe discharge amplitude and waveform and charged detection method and portable unit simple to operate at what bottom shielding of bushing discharged specially at present.
Summary of the invention
The purpose of the utility model embodiment is to provide a kind of bottom shielding of bushing discharge supersonic detection device, can't intuitively observe discharge amplitude and waveform, complicated operation to solve prior art, carry inconvenient defective.
For achieving the above object, the utility model embodiment provides a kind of bottom shielding of bushing discharge supersonic detection device, and this device comprises: ultrasonic receiver, and the ultrasonic signal that is used for receiving converts analog electrical signal to; Amplifying circuit is connected with described ultrasonic receiver, and the analog electrical signal that receives described ultrasonic receiver conversion mates amplification; Filtering circuit is connected with described amplifying circuit, and the analog electrical signal that amplifies is carried out bandpass filtering; The analog/digital Acquisition Circuit is connected with described filtering circuit, converts described analog electrical signal to digital signal; Governor circuit is connected with described analog/digital Acquisition Circuit, and the digital signal that receives after changing is handled; Peripherals is connected with described governor circuit, is used for the I/O and the storage of data.
In a preferred embodiment, bottom shielding of bushing discharge supersonic detection device of the present utility model also comprises: main infrared location camera lens, be connected with described ultrasonic receiver, utilize the linear feature and the better visuality of Infrared that ultrasonic receiver and bottom shielding of bushing are on the same straight line, guarantee ultrasonic receiver in the smaller angle scope, receive ultrasonic signal the biglyyest from end screen discharge.
Described peripherals comprises: panel is set, is used for carrying out the parameter setting for the user; Storage card is used to store data; Display screen is used to show testing result; Described display screen is a LCDs; Audio output apparatus is used for sound signal and exports in real time, and described audio output apparatus is earphone or loudspeaker.
In a preferred embodiment, bottom shielding of bushing discharge supersonic detection device of the present utility model also comprises: power supply, be used for providing power for operation to each parts and the circuit of described bottom shielding of bushing discharge supersonic detection device, and described power supply is an accumulator.
Described ultrasonic receiver is that frequency is the sonac of 40kHz.
Information such as the bottom shielding of bushing discharge supersonic detection device energy clear view discharge amplitude that the utility model embodiment provides, discharge waveform, and hear discharge sound, can determine easily whether bushing end screen exists discharge.In addition, utilize the detection data of this device long-term accumulation to analyze and to understand equipment working state, improve the anticipation of equipment deficiency, for status of electric power maintenance or state estimation provide the active data support, thereby reduce the generation of electric power accident, reduce economic loss and social influence.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the theory diagram of the utility model bottom shielding of bushing discharge supersonic detection device;
Fig. 2 is the lateral plan of the utility model bottom shielding of bushing discharge supersonic detection device;
Fig. 3 is the front view of the utility model bottom shielding of bushing discharge supersonic detection device;
Fig. 4 is the primary control program process flow diagram of the utility model bottom shielding of bushing discharge supersonic detection device.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment is clearer, below in conjunction with embodiment and accompanying drawing, embodiment is described in further details to the utility model.At this, illustrative examples of the present utility model and explanation thereof are used to explain the utility model, but not as to qualification of the present utility model.
Embodiment one
See also Fig. 1, Fig. 1 is the theory diagram of the utility model bottom shielding of bushing discharge supersonic detection device, and as shown in Figure 1, this bottom shielding of bushing discharge supersonic detection device comprises:
Ultrasonic receiver 1, the ultrasonic signal that is used for receiving converts analog electrical signal to;
Amplifying circuit 2 is connected with described ultrasonic receiver 1, and the analog electrical signal that receives described ultrasonic receiver 1 conversion mates amplification;
Filtering circuit 3 is connected with described amplifying circuit 2, and the analog electrical signal that amplifies is carried out bandpass filtering;
Analog/digital (A/D) Acquisition Circuit 4 is connected with described filtering circuit 3, converts described analog electrical signal to digital signal;
Peripherals is connected with described governor circuit 5, is used for the I/O and the storage of data.
Described peripherals comprises:
In the present embodiment, ultrasonic receiver 1 employing frequency is the sonac of 40kHz.
The three-stage amplifier that amplifying circuit 2 adopts American TI Company chip LM324 to constitute is to guarantee that the end screen discharge ultrasonic signal after certain transmission range decay is amplified.
The active second-order bandpass filter of Chebyshev that filtering circuit 3 adopts based on the family chip MAX274 of MAXIM company.
A/D Acquisition Circuit 4 adopts 12 high speed analog-to-digital conversion chip ADS7816S of serial input, increases the photoelectric isolating circuit that is made of every chip 6N137 fast digital light simultaneously, realizes the governor circuit effective isolation is protected.
Consider factors such as precision, the ATmage16 chip that governor circuit 5 is adopted also need be equipped with suitable peripheral circuit, mainly comprises system clock circuit, external reset circuit, storage card and audio-video interface circuit, real time clock circuit.
In addition, the bottom shielding of bushing discharge supersonic detection device of present embodiment also comprises main infrared location camera lens 10 (among Fig. 2, the Fig. 3), be used for ultrasonic receiver 1 alignment sleeve end screen is guaranteed ultrasonic receiver 1 in the smaller angle scope, receive ultrasonic signal the biglyyest from end screen discharge.
Bottom shielding of bushing discharge supersonic detection device of the present utility model also comprises power supply, and being used for provides power for operation to each parts and the circuit of described bottom shielding of bushing discharge supersonic detection device, uses accumulator usually, has good portability.
See also Fig. 2 and Fig. 3 again, Fig. 2 is the lateral plan of the utility model bottom shielding of bushing discharge supersonic detection device, and Fig. 3 is the front view of the utility model bottom shielding of bushing discharge supersonic detection device.The utility model bottom shielding of bushing discharge all parts of supersonic detection device and circuit are arranged in the housing 11, play a protective role, and the housing below is provided with handle 12, wherein can place the accumulator as power supply.Below the front display screen 8 of the utility model bottom shielding of bushing discharge supersonic detection device, be provided with power switch 13, menu key 14, return button 15, range increases button 16, range reduces button 17, and volume increases button 18, volume-down keys 19, simultaneously audio output apparatus 9 also is provided with earphone and connects hole (9 position among the figure) if during earphone.
Cardinal principle of the present utility model is: when discharge took place, air was ionized, and was accompanied by light, heat, the release of sound homenergic.Preamble has been analyzed the limitation of light, thermal diagnosis method, and comparatively the suitable technique scheme is not applied in this two kinds of diagnostic methods in the detection of bottom shielding of bushing discharge.The ultrasonic signal frequency of bottom shielding of bushing discharge generation has good beam, directivity and penetrability about 40kHz, and can propagate enough distances, the utility model with ultrasonic principle as the basis.
In concrete work, ultrasonic receiver 1 of the present utility model adopts the sonac of good directionality.Main infrared location camera lens is used for ultrasonic receiver 1 alignment sleeve end screen is guaranteed ultrasonic receiver in the smaller angle scope, receives the ultrasonic signal from end screen discharge the biglyyest.Ultrasonic receiver 1 converts the ultrasonic signal that receives to analog electrical signal, insert amplifying circuit 2 and mate amplification, again after filtering circuit 3 carries out bandpass filtering, insert A/D Acquisition Circuit 4 and carry out analog to digital conversion, the digital signal that obtains is inserted governor circuit 5, carry out computings such as denoising, correction according to preset program.Governor circuit 5 in real time with panel 6, storage card 7, display screen 9 and audio output apparatus 9 (is example with the earphone) be set carry out alternately, finish user's setting, discharge amplitude and functions such as waveform shows in real time, sound signal is exported in real time, the preservation of discharge waveform data, and equipment adopts storage battery power supply, is convenient for carrying.
The characteristics of bottom shielding of bushing discharge supersonic detection device of the present utility model are, at the sleeve pipe many places in substation, the ground unrest that corona produces brings this actual techniques problem of very big interference, by gathering background noise data in advance, carries out frequency-domain analysis again and realizes noise removal function.
Simultaneously, there are some influence factors in the non-contact measurement of bottom shielding of bushing discharge, for example, propagation attenuation, the influence of humidity, Influences on Wind Velocity, influence of atmosphere pressure in the blocking of shell, the atmosphere.Therefore, the discharge capacity reflection that obtains of non-contact measurement is not true discharge capacity.Bottom shielding of bushing discharge supersonic detection device of the present utility model has added debugging functions at this practical problems.By the screen discharge of artificial analog casing end, the influence factor of artificially make atmospheric pressure, humidity, wind speed, distance, blocking takes multiple measurements and data analysis with this equipment, the acquisition corrected parameter, and be applied in this device.
See also Fig. 4 again, Fig. 4 is the primary control program process flow diagram of the utility model bottom shielding of bushing discharge supersonic detection device.
After the utility model bottom shielding of bushing discharge supersonic detection device is started working, at first read key information, judge whether then to store, if, key information is write storage card, if not, judge that then measurement pattern is noise measurement pattern or discharge measuring pattern, writes storage card with measurement result again if the noise measurement pattern is then carried out data acquisition; If discharge measuring pattern, then, carry out the frequency domain denoising again, demonstrate measurement result by LCDs through after the adjustment of data by the ultrasonic receiver image data, can also pass through audio output apparatus in case of necessity, earphone for example, output audio signal judges whether to exceed limit value then, if do not exceed limit value, then return initial conditions and proceed to measure,, then sound and report to the police if exceed limit value.
Bottom shielding of bushing discharge supersonic detection device of the present utility model also can be revised measurement result.Specific implementation method is as follows: in pre-stage test, the artificial bottom shielding of bushing of making discharges, obtain true discharge capacity by other electrical means, use apparatus of the present invention to measure discharge capacity under the aforementioned various influence factor simultaneously, obtain to revise relation curve, again it is deposited in the data-carrier store of ATmage 16 chips that governor circuit 5 adopted, and in primary control program, measurement data is revised.
Bottom shielding of bushing discharge supersonic detection device of the present utility model can carry out denoising to measurement result.Specific implementation method is as follows: gather ground unrest, be stored in the storage card, utilize frequency-domain analysis method to calculate filtering noise again in the primary control program of governor circuit 5.
Concrete grammar and the step of using bottom shielding of bushing discharge supersonic detection device of the present utility model to carry out the bottom shielding of bushing discharge measuring are: under the noise drainage pattern, ultrasonic receiver is faced toward background environment, for example sky obtains background signal by ultrasonic receiver, and it is stored in the storage card; Then, utilize main infrared location camera lens, ultrasonic receiver alignment sleeve end screen is measured, preserve maximum waveform; Relatively judge by horizontal and vertical data at last.
Utilize bottom shielding of bushing of the present utility model discharge supersonic detection device to carry out that electric power is daily patrols and examines, can clear view discharge amplitude, information such as discharge waveform, and hear discharge sound, can determine easily the bushing end shields whether there is discharge.In addition, utilize the detection data of this device long-term accumulation to analyze and to understand equipment working state, improve the anticipation of equipment deficiency, for status of electric power maintenance or state estimation provide the active data support, thereby reduce the generation of electric power accident, reduce economic loss and social influence.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is a specific embodiment of the utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. bottom shielding of bushing discharge supersonic detection device is characterized in that this device comprises:
Ultrasonic receiver, the ultrasonic signal that is used for receiving converts analog electrical signal to;
Amplifying circuit is connected with described ultrasonic receiver, and the analog electrical signal that receives described ultrasonic receiver conversion mates amplification;
Filtering circuit is connected with described amplifying circuit, and the analog electrical signal that amplifies is carried out bandpass filtering;
The analog/digital Acquisition Circuit is connected with described filtering circuit, converts described analog electrical signal to digital signal;
Governor circuit is connected with described analog/digital Acquisition Circuit, and the digital signal that receives after changing is handled;
Peripherals is connected with described governor circuit, is used for the I/O and the storage of data.
2. bottom shielding of bushing discharge supersonic detection device according to claim 1 is characterized in that, also comprises:
Main infrared location camera lens, be connected with described ultrasonic receiver, utilize the linear feature and the better visuality of Infrared that ultrasonic receiver and bottom shielding of bushing are on the same straight line, guarantee ultrasonic receiver in the smaller angle scope, receive ultrasonic signal the biglyyest from end screen discharge.
3. bottom shielding of bushing discharge supersonic detection device according to claim 1 and 2 is characterized in that described peripherals comprises:
Panel is set, is used for carrying out the parameter setting for the user;
Storage card is used to store data;
Display screen is used to show testing result;
Audio output apparatus is used for sound signal and exports in real time.
4. bottom shielding of bushing discharge supersonic detection device according to claim 3 is characterized in that, also comprises:
Power supply is used for providing power for operation to each parts and the circuit of described bottom shielding of bushing discharge supersonic detection device.
5. bottom shielding of bushing discharge supersonic detection device according to claim 4, it is characterized in that: described power supply is an accumulator.
6. bottom shielding of bushing discharge supersonic detection device according to claim 1, it is characterized in that: described ultrasonic receiver is that frequency is the sonac of 40kHz.
7. bottom shielding of bushing discharge supersonic detection device according to claim 3, it is characterized in that: described display screen is a LCDs.
8. bottom shielding of bushing discharge supersonic detection device according to claim 3, it is characterized in that: described audio output apparatus is earphone or loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201378550U CN202075374U (en) | 2011-05-04 | 2011-05-04 | Sleeve end shield discharging ultrasonic detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201378550U CN202075374U (en) | 2011-05-04 | 2011-05-04 | Sleeve end shield discharging ultrasonic detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202075374U true CN202075374U (en) | 2011-12-14 |
Family
ID=45113471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201378550U Expired - Lifetime CN202075374U (en) | 2011-05-04 | 2011-05-04 | Sleeve end shield discharging ultrasonic detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202075374U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998605A (en) * | 2012-12-07 | 2013-03-27 | 山西省电力公司吕梁供电公司 | System and method for signal modulation for panoramic partial discharge monitoring of transformer substation |
| CN103777126A (en) * | 2013-11-22 | 2014-05-07 | 国家电网公司 | Transformer partial discharge ultrasonic sensor circuit structure |
| CN104749495A (en) * | 2013-12-27 | 2015-07-01 | 国家电网公司 | Device and method for performing electrified detection and diagnosing power equipment defects |
| CN108269680A (en) * | 2018-01-23 | 2018-07-10 | 华北电力大学（保定） | A kind of wall-attaching type sonac arrangement |
| CN111999386A (en) * | 2020-08-31 | 2020-11-27 | 国网河南省电力公司平顶山供电公司 | Method for detecting transformer capacitive bushing tap grounding |
-
2011
- 2011-05-04 CN CN2011201378550U patent/CN202075374U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998605A (en) * | 2012-12-07 | 2013-03-27 | 山西省电力公司吕梁供电公司 | System and method for signal modulation for panoramic partial discharge monitoring of transformer substation |
| CN103777126A (en) * | 2013-11-22 | 2014-05-07 | 国家电网公司 | Transformer partial discharge ultrasonic sensor circuit structure |
| CN103777126B (en) * | 2013-11-22 | 2016-09-07 | 国家电网公司 | A kind of partial discharge of transformer sonac circuit structure |
| CN104749495A (en) * | 2013-12-27 | 2015-07-01 | 国家电网公司 | Device and method for performing electrified detection and diagnosing power equipment defects |
| CN104749495B (en) * | 2013-12-27 | 2018-06-22 | 国家电网公司 | The device and method of live detection and diagnosing electric power defect |
| CN108269680A (en) * | 2018-01-23 | 2018-07-10 | 华北电力大学（保定） | A kind of wall-attaching type sonac arrangement |
| CN108269680B (en) * | 2018-01-23 | 2019-08-23 | 华北电力大学（保定） | A kind of wall-attaching type ultrasonic sensor arragement construction |
| CN111999386A (en) * | 2020-08-31 | 2020-11-27 | 国网河南省电力公司平顶山供电公司 | Method for detecting transformer capacitive bushing tap grounding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202075374U (en) | Sleeve end shield discharging ultrasonic detection device | |
| CN109342906B (en) | Multifunctional partial discharge detection system and method | |
| CN103913679B (en) | High-tension switch cabinet partial discharge monitoring system | |
| CN102680804B (en) | Lightning electric field change signal measuring system and method | |
| CN202075376U (en) | GIS (gas-insulated switchgear) partial discharge monitoring device | |
| CN110161386A (en) | A kind of portable high-pressure cable connector local discharge detection device and method | |
| CN104808123B (en) | A kind of partial discharge of switchgear detecting system | |
| CN103616625A (en) | External sensor system used for detecting partial discharge | |
| KR20100041042A (en) | Wireless acoustic emission sensor module based on magnetic power, on-line partial discharge measurement system using the sensor, and their method | |
| CN105911443A (en) | Online measurement system for partial discharge of cable middle joint based on clamp-shaped coaxial capacitor | |
| CN111830381A (en) | Watchband-adjustable full-laminated cable partial discharge ultrasonic sensor and online monitoring method | |
| CN102721854B (en) | Power network overvoltage signal detection method and system | |
| CN103399265A (en) | High voltage cable terminal partial discharge ultrasonic monitor | |
| CN202339383U (en) | Extra-high voltage insulator detector | |
| CN201955435U (en) | GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor | |
| CN104898032A (en) | Fault detection apparatus of distribution network switch cabinet | |
| CN201134163Y (en) | Corona current measurement mechanism | |
| CN104849635A (en) | Partial discharge positioning system based on ultrasonic sensor array | |
| CN202362384U (en) | Extra-high voltage insulator detector | |
| CN213457212U (en) | Partial discharge detection device for high-voltage electrical equipment | |
| CN204666743U (en) | A kind of test cabinet with electromagnetic compatibility test probe | |
| CN101852825A (en) | Wideband online measuring system for corona current of high-voltage transmission line | |
| JP5153693B2 (en) | Data collection system | |
| CN202614893U (en) | High-tension switch cabinet partial discharge detection and location system | |
| CN207007993U (en) | A kind of measuring device with electricity of partial discharge of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD. Effective date: 20131029 Owner name: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD Effective date: 20131029 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100045 XICHENG, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131029 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: North China Electrical Power Research Institute LLC Address before: 100045 Beijing city Xicheng District Fuxingmenwai Nan Xiang Di Zang an 1 Patentee before: North China Electrical Power Research Institute LLC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |
|
| CX01 | Expiry of patent term |