CN104749495B - The device and method of live detection and diagnosing electric power defect - Google Patents
The device and method of live detection and diagnosing electric power defect Download PDFInfo
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- CN104749495B CN104749495B CN201310740777.7A CN201310740777A CN104749495B CN 104749495 B CN104749495 B CN 104749495B CN 201310740777 A CN201310740777 A CN 201310740777A CN 104749495 B CN104749495 B CN 104749495B
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- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The present invention provides a kind of live detection and the device and method of diagnosing electric power defect, and device includes：Ultrasonic detector and host；Ultrasonic detector is connected with host by data line；Ultrasonic detector includes：Ultrasonic sensor, signal processing circuit, wet temperature sensor, data output interface, power supply and shell；Shell includes receiving port, connector and handle；Receiving port sound mouth is fixedly connected by connector with handle；The output terminal of ultrasonic sensor and the input terminal of signal processing circuit connect, and the output terminal of signal processing circuit is connect with data output interface；Wet temperature sensor is built in enclosure, and output terminal is connected to data output interface；Power supply is connect respectively with signal processing circuit, ultrasonic sensor and wet temperature sensor.Remote live detection can not be contacted, can realize the accurate positionin of defect and the diagnosis of degradation.
Description
Technical field
The present invention relates to a kind of power equipments defect detection devices, and in particular to a kind of live detection and diagnosing electric power
The device and method of defect.
Background technology
After a period of time is run, some equipment can decline power equipment because a variety of causes causes to insulate, so as to cause
Undesirable partial discharge phenomenon.When a partial discharge occurs, the apparatus insulated service life can be influenced.Specifically, when discharging every time, due to
High-energy electron or the impact for accelerating electronics, particularly long-term shelf depreciation act on, and can cause the physical effect of diversified forms
And chemical reaction, when hitting bubble outer wall such as charging point, it is possible to interrupt the chemical bond of insulation and crack, destroy insulation
Molecular structure, cause insulation degradation, accelerate insulation damages process, eventually lead to the generation of electrical equipment fault, cause power grid
Have a power failure, so as to bring about great losses to electricity consumption user and electric power enterprise.
In the prior art, generally using PD meter detection power equipment whether partial discharge phenomenon occurs, be primarily present with
Lower deficiency：（1）Since power equipment operates in high pressure conditions, this kind of mode is a kind of close contact detection mode, need by
Sensor pastes detection site, and accordingly, there exist security risks, it is difficult to effectively promote the use of.（2）PD meter is qualitative inspection
It surveys, can only detect whether power equipment has occurred shelf depreciation, and cannot position.（3）The effective range of Sensor monitoring is smaller,
Field application is more inconvenient；In addition, can not analyze defect, the only size of reaction detection numerical value.
Invention content
In view of the defects existing in the prior art, the present invention provides a kind of live detection and the device of diagnosing electric power defect
And method, remote live detection can not be contacted, can realize the accurate positionin of defect and the diagnosis of degradation.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of live detection and the device of diagnosing electric power defect, including：Ultrasonic detector and master
Machine；The ultrasonic detector is connected with the host by data line；
The ultrasonic detector includes：Ultrasonic sensor, signal processing circuit, wet temperature sensor, data output
Interface, power supply and shell；The shell is horn shape, and inner surface is minute surface, including receiving port, connector and hand
Handle；The sound mouth diameter of the receiving port is less than into sound mouth diameter, which is fixed by the connector and the handle
Connection；The ultrasonic sensor is fixed to the inside of the connector, and the signal processing circuit and the power supply are consolidated
Surely the inside of the handle is arrived, also, the output terminal of the ultrasonic sensor and the input terminal of the signal processing circuit connect
It connects, the output terminal of the signal processing circuit is connect with the data output interface；The wet temperature sensor is built in described
Enclosure, output terminal are connected to the data output interface；The power supply respectively with the signal processing circuit, institute
Ultrasonic sensor is stated to connect with the wet temperature sensor.
Preferably, the signal processing circuit is detection analog loopback, sound wave amplifying return circuit and the digital loop of series connection.
Preferably, the sound wave amplifying return circuit output terminal is also associated with audio output interface.
Preferably, the receiving port is 15 degree of tubaeform cones, and the housing of the receiving port is made of engineering plastics；Institute
Connector is stated as aluminum fitting, one end of the insulated connecting piece is connected through a screw thread with the receiving port.
Preferably, the handle is cylinder；Power switch is additionally provided on the surface of the handle；The power switch
It is electrically connected with the power supply.
Preferably, the power supply is lithium battery.
Preferably, sighting device is further included；The sighting device is fixedly mounted on the intersecting of the receiving port and the connector
Position.
The present invention also provides a kind of live detections and the method for diagnosing electric power defect, include the following steps：
S1, ultrasonic detector scanning is detected power equipment, if receiving raw ultrasound signals, to the original
Beginning ultrasonic signal is pre-processed, the ultrasonic signal that obtains that treated；
S2, treated that ultrasonic signal is transferred to master by data output interface by described for the ultrasonic detector
Machine；Meanwhile the collected temperature humidity value of wet temperature sensor is also uploaded to host by the ultrasonic detector；
S3, the host carry out treated the ultrasonic signal waveform analysis and audio analysis and combine to detect
Distance, the temperature humidity value, device category, equipment state comprehensive factor, obtain initial analysis result；By the initial analysis
As a result it is compared with data in database, is diagnosed to be detected power equipment degradation.
Preferably, in S1, the raw ultrasound signals are pre-processed specially：
The raw ultrasound signals are filtered, enhanced processing；After S3, further include：
S4, the host show treated the ultrasonic signal received dynamic waveform and, will diagnosis knot
Fruit stores in memory.
Preferably, S3 is specially：
S31 calculates initial assay values by the following formula：
Initial assay values=- 17.651+28.651X1+89.836X2-0.029X3+0.832X4；
Wherein, X1For device category；X2:For equipment state；X3For detection waveform average value dB；X4For virtual value；
Wherein, virtual value X4Signal value+offset of=detection；
Wherein, offset=- 1.6106 (reference range value-distance (m)) -0.015 (reference temperature value-humidity %))+
0.1335 (reference temperature value-temperature (DEG C))；
S32, a reference value of diagnosis is 0.5, if initial assay values are more than 0.5, it is serious to show equipment degradation
Grade；If initial assay values are less than or equal to 0.5, equipment degradation is general grade.
Beneficial effects of the present invention are as follows：
（1）Ultrasonic sensor does not need to be in direct contact tested equipment, is a kind of non-contacting detection mode, ensures detection
Personnel safety；
（2）Entire ultrasonic detector is designed using portable construction, and overall weight is no more than 800 grams, with it is small,
It is light-weight, it can directly hand-held use, facilitate the partial discharge phenomenon of any terrain environment live detection power equipment.
（3）The device detecting distance reaches 30 meters, can not contact remote live detection, can realize the accurate fixed of defect
Position and the diagnosis of degradation.
（4）Acquisition, detection, diagnosis are integrated, electric company operations staff is helped to prevent the generation of electrical equipment fault, is reduced
Power off time improves the reliability of operation of power networks.Compared with traditional supersonic detector, this device only acquires electric power
The ultrasonic signal of the specific frequency generated during apparatus local discharge, itself does not emit ultrasonic signal.
Description of the drawings
Fig. 1 is live detection provided by the invention and the device circuit schematic diagram of diagnosing electric power defect；
Fig. 2 is the overall structure diagram of ultrasonic detector provided by the invention；
Fig. 3 is the sectional view of receiving port provided by the invention；
Fig. 4 is the profile diagram of receiving port provided by the invention；
Fig. 5 is Fig. 3 right views；
Fig. 6 is Fig. 3 left views；
Fig. 7 is the front section view of handle provided by the invention；
Fig. 8 is the back side sectional view of handle provided by the invention；
Fig. 9 is the profile diagram of handle provided by the invention；
Figure 10 is Fig. 8 right views；
Figure 11 is the profile diagram of sighting device provided by the invention；
Figure 12 is Figure 10 right views；
Figure 13 is Figure 11 sectional views；
Wherein, 1--- receiving ports；2--- connectors；3--- handles.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail：
With reference to Fig. 1-Figure 13, the present invention provides a kind of live detection and the device of diagnosing electric power defect, including：Ultrasound
Wave detector and host；The ultrasonic detector is connected with the host by data line；
The ultrasonic detector includes：Ultrasonic sensor, signal processing circuit, wet temperature sensor, data output
Interface, power supply and shell；The shell is horn shape, and inner surface is minute surface, including receiving port, connector and hand
Handle；The sound mouth diameter of the receiving port is less than into sound mouth diameter, which is fixed by the connector and the handle
Connection；The ultrasonic sensor is fixed to the inside of the connector, and the signal processing circuit and the power supply are consolidated
Surely the inside of the handle is arrived, also, the output terminal of the ultrasonic sensor and the input terminal of the signal processing circuit connect
It connects, the output terminal of the signal processing circuit is connect with the data output interface；The wet temperature sensor is built in described
Enclosure, output terminal are connected to the data output interface；The power supply respectively with the signal processing circuit, institute
Ultrasonic sensor is stated to connect with the wet temperature sensor.
Wherein, signal processing circuit is detection analog loopback, sound wave amplifying return circuit and the digital loop of series connection., for pair
The collected signal of ultrasonic sensor institute carries out analog-to-digital conversion, filtering and enhanced processing, and pass through digital loop and upload to master
Machine.In addition, sound wave amplifying return circuit output terminal is also associated with audio output interface, audio sound is exported by audio output interface.
Receiving port is 15 degree of tubaeform cones, and test point can be positioned, improve the precision of detection；Receiving port
Housing is made of engineering plastics, such as ABS+PC materials, can effectively be reduced the weight of whole detection probe, be improved intensity.Also,
Receiving port inner surface uses minute surface, can improve the sound signal intensity for reaching ultrasonic sensor, improves accuracy of detection.
Connector uses insulated connecting piece, such as aluminum fitting.One end of insulated connecting piece can be connected with receiving port by screw thread
It connects.Ultrasonic sensor uses Miniature ultrasonic sensor, is built in fine aluminium part components interior, can effectively enhance anti-interference energy
Power.
As is seen in figs 7-10, handle is cylinder, facilitates to be taken with hand and hold.Power switch is additionally provided on the surface of handle；
Power switch is electrically connected with power supply.Wherein, power supply is lithium battery.Lithium battery is built in handle inner, is easy to open
With replacement battery, have the advantages that easy to use.
As figs 11-13, sighting device is further included.Sighting device is fixedly mounted on receiving port and the cross-shaped portion of insulated connecting piece
Position.
The operation principle of the live detection and the device of diagnosing electric power defect detection power equipment partial discharge phenomenon
For：
Since power equipment discharge is a complicated gas discharge physical process, it may appear that many phenomenons e.g., work as electric discharge
During generation, the intermolecular of region of discharge will generate violent shock, and this shock macroscopically shows as a kind of pressure, due to electric discharge
It is a series of pulse, so, resulting pressure wave is also impulse form, and containing various frequency components, wherein frequency surpasses
Cross 20KHz is ultrasonic wave.It is acquired by the ultrasonic wave generated to power equipment shelf depreciation, this signal is passed through into filter
Wave and enhanced processing, are passed in host, by waveform analysis, you can are diagnosed to be detected power equipment degradation.
Specifically include following steps：
S1, ultrasonic detector scanning is detected power equipment, if receiving raw ultrasound signals, to the original
Beginning ultrasonic signal is pre-processed, the ultrasonic signal that obtains that treated；
Wherein, pretreatment is specially：Raw ultrasound signals are filtered, enhanced processing.In addition, ultrasonic detector
It could be provided as the raw ultrasound signals that only receives frequency is 40 ± 1kHz.
S2, treated that ultrasonic signal is transferred to master by data output interface by described for the ultrasonic detector
Machine；Meanwhile the collected temperature humidity value of wet temperature sensor is also uploaded to host by the ultrasonic detector；
S3, the host carry out treated the ultrasonic signal waveform analysis and audio analysis and combine to detect
Distance, the temperature humidity value, obtain initial analysis result；The initial analysis result is compared with data in database
It is right, it is diagnosed to be detected power equipment degradation and deterioration position.
Waveform analysis is carried out to ultrasonic signal, Main Analysis mode is：Ultrasound differentiates that amplitude differentiates, adaptive-filtering
Deng.
Specifically diagnostic method is：S31 calculates initial assay values by the following formula：
Initial assay values=- 17.651+28.651X1+89.836X2-0.029X3+0.832X4；
Wherein, X1For device category, such as：Pillar insulator, suspension insulator, arrester, fuse, cable termination,
Switchgear, transformer, disconnecting switch；
X2:For equipment state, for example, crackle, erosion, charing, breakdown, loose contact, burn into filth, albefaction, surface stripping
Fall, surface it is good；X1And X2Value be to be got through great number tested data research.
X3For detection waveform average value dB；X4For virtual value；
Wherein, virtual value X4Signal value+offset of=detection；
Wherein, offset=- 1.6106 (reference range value-distance (m)) -0.015 (reference temperature value-humidity %))+
0.1335 (reference temperature value-temperature (DEG C))；Reference range value is 13.5 meters under normal circumstances, and reference temperature value is 24 degree, base
Quasi- humidity value is 50%；
S32, a reference value of diagnosis is 0.5, if initial assay values are more than 0.5, it is serious to show equipment degradation
Grade；If initial assay values are less than or equal to 0.5, equipment degradation is general grade.
After S3, further include：
S4, the host show treated the ultrasonic signal received dynamic waveform and, will diagnosis knot
Fruit stores in memory.
For example, using diagnostic result as a text files memory in the memory built in host, user can pass through
Display is consulted, and achievees the purpose that detect power equipments defect.Mobile memory card is configured in host, can import data to PC electricity
Brain facilitates examining report generation, printing, inquiry.
It can be seen that live detection provided by the invention and the device and method of diagnosing electric power defect, main to apply
During Diagnostic Examination And Repair of Electric Power Facilities in power industry, has the following advantages：
（1）Ultrasonic sensor does not need to be in direct contact tested equipment, is a kind of non-contacting detection mode, ensures detection
Personnel safety；
（2）Entire ultrasonic detector is designed using portable construction, and overall weight is no more than 800 grams, with it is small,
It is light-weight, it can directly hand-held use, facilitate the partial discharge phenomenon of any terrain environment live detection power equipment.
（3）The device detecting distance reaches 30 meters, can not contact remote live detection, can realize the accurate fixed of defect
Position and the diagnosis of degradation.
（4）Acquisition, detection, diagnosis are integrated, electric company operations staff is helped to prevent the generation of electrical equipment fault, is reduced
Power off time improves the reliability of operation of power networks.Compared with traditional supersonic detector, this device only acquires electric power
The ultrasonic signal of the specific frequency generated during apparatus local discharge, itself does not emit ultrasonic signal.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (1)
1. the live detection of device based on live detection and diagnosing electric power defect a kind of and diagnosing electric power defect
Method, which is characterized in that the device based on live detection and diagnosing electric power defect includes：Ultrasonic detector and host；
The ultrasonic detector is connected with the host by data line；
The ultrasonic detector includes：Ultrasonic sensor, signal processing circuit, wet temperature sensor, data output interface,
Power supply and shell；The shell is horn shape, and inner surface is minute surface, including receiving port, connector and handle；It is described
The sound mouth diameter of receiving port is less than into sound mouth diameter, which is fixedly connected by the connector with the handle；Institute
The inside that ultrasonic sensor is fixed to the connector is stated, the signal processing circuit and the power supply are fixed to described
The inside of handle, also, the output terminal of the ultrasonic sensor is connect with the input terminal of the signal processing circuit, the letter
The output terminal of number processing circuit is connect with the data output interface；The wet temperature sensor is built in the enclosure,
Its output terminal is connected to the data output interface；The power supply respectively with the signal processing circuit, the ultrasonic wave
Sensor is connected with the wet temperature sensor；
Method includes the following steps：
S1, ultrasonic detector scanning is detected power equipment, if receiving raw ultrasound signals, to described original super
Acoustic signals are pre-processed, the ultrasonic signal that obtains that treated；
S2, treated that ultrasonic signal is transferred to host by data output interface by described for the ultrasonic detector；Together
When, the collected temperature humidity value of wet temperature sensor is also uploaded to host by the ultrasonic detector；
S3, the host waveform analysis and audio analysis are carried out to treated the ultrasonic signal and combine detecting distance,
The temperature humidity value, device category, equipment state comprehensive factor, obtain initial analysis result；By the initial analysis result
It is compared with data in database, is diagnosed to be detected power equipment degradation；
Wherein, in S1, the raw ultrasound signals are pre-processed specially：
The raw ultrasound signals are filtered, enhanced processing；After S3, further include：
S4, the host show treated the ultrasonic signal received dynamic waveform and, diagnostic result is deposited
Storage is in memory；
Wherein, the signal processing circuit is detection analog loopback, sound wave amplifying return circuit and the digital loop of series connection；
Wherein, the sound wave amplifying return circuit output terminal is also associated with audio output interface；
Wherein, the receiving port is 15 degree of tubaeform cones, and the housing of the receiving port is made of engineering plastics；The connection
Part is aluminum fitting, and one end of the aluminum fitting is connected through a screw thread with the receiving port；
Wherein, the handle is cylinder；Power switch is additionally provided on the surface of the handle；The power switch with it is described
Power supply is electrically connected；
Wherein, the power supply is lithium battery；
Wherein, sighting device is further included；The sighting device is fixedly mounted on the intersection area of the receiving port and the connector.
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| WO2018053689A1 (en) * | 2016-09-20 | 2018-03-29 | 惠州市吉瑞科技有限公司深圳分公司 | Electronic cigarette and identification method |
| CN106370728A (en) * | 2016-12-02 | 2017-02-01 | 河南宏博测控技术有限公司 | Power grid fault ultrasonic testing device and method |
| CN114910758B (en) * | 2022-05-17 | 2023-05-12 | 国网黑龙江省电力有限公司佳木斯供电公司 | Switch equipment partial discharge detection method based on intelligent sound-electricity combined sensing |
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| CN101666850A (en) * | 2009-09-29 | 2010-03-10 | 延安供电局 | Acoustic-electric detection device for insulation defects of power cable |
| CN202075374U (en) * | 2011-05-04 | 2011-12-14 | 华北电力科学研究院有限责任公司 | Sleeve end shield discharging ultrasonic detection device |
| CN102279350A (en) * | 2011-03-31 | 2011-12-14 | 广东电网公司广州供电局 | Ultrasonic wave partial discharge detection analyzer |
| CN102298107A (en) * | 2011-05-20 | 2011-12-28 | 华南理工大学 | Portable ultrasonic wave and cloud detection apparatus for partial discharge |
| CN202854282U (en) * | 2012-09-11 | 2013-04-03 | 山东鲁亿通智能电气股份有限公司 | Parabolic reflector for supersonic-wave detection method for partial discharge |
| CN203658525U (en) * | 2013-12-27 | 2014-06-18 | 国家电网公司 | Device for performing electrified detection and diagnosing power equipment defects |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2940459B1 (en) * | 2008-12-22 | 2012-11-30 | Commissariat Energie Atomique | METHOD FOR DETECTING ELECTRIC ARC IN A PHOTOVOLTAIC INSTALLATION |
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- 2013-12-27 CN CN201310740777.7A patent/CN104749495B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666850A (en) * | 2009-09-29 | 2010-03-10 | 延安供电局 | Acoustic-electric detection device for insulation defects of power cable |
| CN102279350A (en) * | 2011-03-31 | 2011-12-14 | 广东电网公司广州供电局 | Ultrasonic wave partial discharge detection analyzer |
| CN202075374U (en) * | 2011-05-04 | 2011-12-14 | 华北电力科学研究院有限责任公司 | Sleeve end shield discharging ultrasonic detection device |
| CN102298107A (en) * | 2011-05-20 | 2011-12-28 | 华南理工大学 | Portable ultrasonic wave and cloud detection apparatus for partial discharge |
| CN202854282U (en) * | 2012-09-11 | 2013-04-03 | 山东鲁亿通智能电气股份有限公司 | Parabolic reflector for supersonic-wave detection method for partial discharge |
| CN203658525U (en) * | 2013-12-27 | 2014-06-18 | 国家电网公司 | Device for performing electrified detection and diagnosing power equipment defects |
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