CN108120905A - A kind of detection method of partial discharge of electrical equipment and its detection device - Google Patents
A kind of detection method of partial discharge of electrical equipment and its detection device Download PDFInfo
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- CN108120905A CN108120905A CN201711332408.9A CN201711332408A CN108120905A CN 108120905 A CN108120905 A CN 108120905A CN 201711332408 A CN201711332408 A CN 201711332408A CN 108120905 A CN108120905 A CN 108120905A
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- laser
- partial discharge
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- electrical equipment
- detection
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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
- G01R31/1209—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 acoustic measurements
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
A kind of detection method of partial discharge of electrical equipment, the method utilize a partial discharge detection device, and ultrasonic partial discharge inspection device and laser emitter are equipped in partial discharge detection device；Inspection device is directed at electrical equipment to be measured and by adjusting detection direction in fixed position, make received ultrasonic signal most strong, laser spot position on the position and electrical equipment of recording laser transmitter, and then obtain the trajectory of the laser beam of laser emitter；The position for changing inspection device is detected again, is acquired the intersection point of detection gained trajectory of the laser beam extended line twice, is obtained the specific location of partial discharges fault.The present invention gives to detect the ultrasonic partial discharge detector of partial discharges fault simultaneously.The present invention quickly and accurately determines fault direction using laser facula, and then obtains the specific location of partial discharge failure, can not only ensure the positioning accuracy of failure, but also easy to operate, not only time saving and energy saving, but also eliminates accident potential.
Description
Technical field
The present invention relates to a kind of method that can quickly and accurately detect Substation Electric Equipment partial discharges fault and it is somebody's turn to do
The special detection device of detection method, belongs to detection technique field.
Background technology
Local discharge of electrical equipment failure generally can be with corona, electric arc and electric trace.Corona and the electric trace at initial stage will not produce
Heat amount, and high ambient temperature can also cover up these phenomenons, can not be detected with daily thermal infrared imager, but it can be generated
Ultrasonic signal can be detected at a distance with ultrasonic wave electric apparatus local discharge inspection device.Electric arc and serious electricity
Trace can also generate high heat while ultrasonic wave is generated, therefore can be carried out testing with infrared and ultrasonic wave method, but
It when partial discharge is happened inside equipment, can not then be found with infrared method, be filled with the inspection of ultrasonic wave electric apparatus local discharge
Putting can be detected at the surface of electrical equipment or faying face.But existing detection method for local discharge needs to pacify at the scene
Substantial amounts of sensor is filled, it is not only time-consuming and laborious, security incident easily occurs, and out of order exact position cannot be given, therefore
It is necessary to be improved.
The content of the invention
It is an object of the invention to be directed to the drawback of the prior art, a kind of detection method of partial discharge of electrical equipment is provided,
To improve the positioning accuracy of partial discharges fault, the present invention gives to detect the ultrasound of partial discharges fault simultaneously
Ripple partial discharge detector.
Problem of the present invention is realized with following technical proposals：
A kind of detection method of partial discharge of electrical equipment, the method utilizes a partial discharge detection device, in partial discharge detection
Ultrasonic partial discharge inspection device and laser emitter are equipped in device；Ultrasonic wave direction of the launch center line and Laser emission side are set
To center line overlap, inspection device is directed at electrical equipment to be measured by the position selected in space, by adjusting detection side
To, make received ultrasonic signal most strong, the laser spot position on the position and electrical equipment of recording laser transmitter,
And then the trajectory of the laser beam of laser emitter is obtained, trajectory of the laser beam is the center line of the ultrasonic wave direction of the launch；Adjust laser
Beam trajectory makes it vertical with the equipment surface at laser facula, and position of the laser facula on equipment under test is taken with camera,
Obtain having recorded the equipment under test picture of laser facula.
Above-mentioned detection method of partial discharge of electrical equipment obtains the mistake of equipment surface laser facula in change trajectory of the laser beam
Cheng Zhong, adjustment trajectory of the laser beam make it vertical with the equipment surface at laser facula, and laser facula is taken tested with camera
Position in equipment, obtains having recorded the equipment under test picture of laser facula, hanging down at the laser facula on equipment under test picture
Line is a ultrasound beamformer of partial discharge trouble point transmitting, and partial discharges fault point is also necessarily present in hanging down at laser facula
On the extended line of line；
The position for changing inspection device is detected again, acquires the friendship of detection gained trajectory of the laser beam extended line twice
Point is to get to the space specific location of partial discharges fault point.
Above-mentioned detection method of partial discharge of electrical equipment, twice the angle between detection gained trajectory of the laser beam be 80~
100 degree.
A kind of ultrasonic partial discharge detector for the detection of above-mentioned local discharge of electrical equipment, the ultrasonic partial discharge inspection
The composition of device includes tubaeform poly- ripple device, sonac, display screen, metal shell and the ultrasound in metal shell
Preamplification board, metallic shield, laser emitter and master control borad, the antetheca of the metal shell are metal installation base, rear wall
Display screen is installed；The poly- ripple device is fixed on metal installation base forepart；The sonac is inlaid in the logical of metal installation base
In hole and in the focus of poly- ripple device, the ultrasound preamplification board is mounted on what metal installation base was surrounded with metallic shield
In cavity, the output terminal of sonac is connected by the input terminal of ultrasonic preamplification board and master control borad, the master control borad
Output termination display screen；The laser emitter is mounted on the rear portion of metallic shield, and the laser that laser emitter is sent is successively
Detected electrical equipment is radiated at after through the laser vias in metallic shield, ultrasonic preamplification board and metal installation base
On, the laser vias of the metal installation base is sealed by transmissive mirror.
Above-mentioned ultrasonic partial discharge detector, GPS module is further included in composition, and the GPS module is mounted on metal shell
Top, the input terminal of the output termination master control borad of GPS module.
Above-mentioned ultrasonic partial discharge detector, camera is further included in composition, and the camera is mounted on the top of metal shell
Portion is simultaneously corresponding with detected electrical equipment, the input terminal of the signal output termination master control borad of camera.
Above-mentioned ultrasonic partial discharge detector, the metal shell are equipped with the Temperature Humidity Sensor being connected with master control borad and use
USB.
Above-mentioned ultrasonic partial discharge detector, the lower part of the metal shell is equipped with hand-held shank type battery case, mounted on battery
Battery in box by the power panel that is arranged in metal shell to ultrasonic preamplification board, laser emitter, GPS module, take the photograph
As head, master control borad and display screen power supply.
Above-mentioned ultrasonic partial discharge detector, the interior reflective surface of the poly- ripple device is parabola.
Laser emitter and ultrasonic partial discharge detector are dexterously combined together by the present invention, fast using laser facula
Speed accurately determines fault direction, and then obtains the specific location of partial discharges fault, can not only ensure the positioning accurate of failure
Degree, and it is easy to operate, it is not only time saving and energy saving, but also eliminate accident potential.
Description of the drawings
Fig. 1 is the structure diagram of ultrasonic partial discharge detector；
Fig. 2 is the stereogram for imaging display portion；
Fig. 3 is the exploded view of poly- ripple device part；
Fig. 4 is fault detection of local discharge schematic diagram.
Each label is expressed as in figure：1st, poly- ripple device, 2, metal installation base, 3, sonac, 4, transmissive mirror, 5, before ultrasound
Put amplification board, 6, metallic shield, 7, laser emitter, 8, power panel, 9, metal shell, 10, GPS module, 11, camera,
12nd, master control borad, 13, display screen, 14, battery case, 15, Temperature Humidity Sensor with USB, 16, electrical equipment, 17, ultrasonic wave office
Put detector.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig. 1, ultrasonic partial discharge detector of the present invention mainly includes poly- ripple device 1, metal installation base 2, surpasses
Sonic transducer 3, ultrasonic preamplification board 5, metallic shield 6, laser emitter 7, power panel 8, metal shell 9, GPS module
10th, camera 11, master control borad 12, display screen 13, battery case 14, Temperature Humidity Sensor USB seats 15.Poly- 1 flare of ripple device,
In use, poly- ripple device is made to be directed toward position to be measured, so as to make full use of its parabolic reflector and concentrate what directed local electric discharge generated
The ultrasonic wave of dispersion angle；Metal installation base 2 is connected with poly- ripple device 1, and metal material has holes, is respectively embedded into sonac 3
With Laser emission transmissive mirror 4, wherein, ultrasonic signal is converted to electric signal by sonac, and transmissive mirror is used for penetrating through laser
Line and the extraneous dust of prevention enter；Ultrasonic preamplification board 5 is fixed in metal installation base 2, for receiving sonac 3
Electric signal is simultaneously amplified, and has a circular hole and the coaxial grade of transmissive mirror 4 on plate greatly；Metallic shield 6 coordinates with metal installation base 2,
Ultrasonic preamplification board 5 is given to form shielding protection layer, also has a circular hole and the coaxial grade of transmissive mirror 4 on shielding case 6 greatly；Laser emission
Device 7 is located at the rear side of shielding case 6, and transmitting light passes sequentially through metallic shield 6, circular hole and transmissive mirror on ultrasonic preamplification board 5
4, it is used to indicate detecting location；Power panel 8 is coated on gold with ultrasonic preamplification board 5, metallic shield 6, laser emitter 7
Belong to inside shell 9, required power supply is provided for other each modules.
GPS module 10 is located at 9 upper surface of metal shell, stores coordinate data automatically, provides GPS navigation function, conveniently looks into
Inquire about preservation detection path；Camera 11 also is located at metal shell upper surface, after GPS module 10, can easily focus detection therefore
Hinder point, and take pictures to shaft tower mark and faulty equipment；Detachable Temperature Humidity Sensor can pass through the humiture on the right side of metal shell
Sensor is neatly accessed and removed with USB seats 15；Hand-held shank type battery case 14 is located at 9 lower surface of metal shell, passes through conducting wire
It is connected with power panel 8；Screen module has metal shell cladding in the last of complete machine outside, inside there is master control borad 12 and embedded display
Screen 13.
Master control borad 12 is the core of complete machine, other each modules are connected to master control borad 12 by conducting wire or winding displacement, and then realize
Acquisition, control, preservation, analysis of data etc..
The low-level ultrasonic signal that electric discharge generates is dissipated by various angles, they utilize its parabolic by poly- ripple device
Face is reflected and focuses on the sonac of center, and is received by the sensor.Poly- ripple device parabola is as a reflection
Device can double detection range, be accurately positioned and be scattered in remote ultrasonic signal, increase sensitivity, reduce from its other party
To interference noise, the person of being adapted for use with is unable to the occasion of proximity device.
Sonac is welded on ultrasonic preamplification board.Local discharge signal is faint, and site environment is complicated, it is easy to
It is influenced by external interference, therefore to be electromagnetically shielded for instrument internal circuit board, can so prevent it by external electromagnetic
The influence of ripple, and mutual electromagnetic interference between wiring board can be reduced.
During final assembly, the angle of laser emitter and camera is finely tuned, makes laser designation point, supersonic sounding point and camera shooting
Center is a position.During partial discharge detection, the present apparatus is held, the detection of " scanning " formula is carried out on equipment under test, works as laser designation
When point is close to electrical equipment partial discharge position, show that the discharge capacity of screen display becomes larger, and the volume that earphone is sent gradually increases
Greatly, the corresponding direction of the maximum is found, is the direction that shelf depreciation possibility maximum occurs, can take pictures to the direction
It records, while the analysis identification of partial discharge type can be carried out according to the electric discharge collection of illustrative plates on screen.The contactless partial discharge measurement is effective
For detecting distance up to 30 meters, reliability is high, and testing staff is made to shoot the arrow at the target, targetedly equipment is carried out maintenance.
When carrying out Partial Discharge Detection to electrical equipment using the present apparatus, testing staff can drive or walking is connect using non-
The mode of touching is detected substation equipment, poly- ripple device is directed at Devices to test, the ultrasonic sensor in device can be efficiently
Receives frequency is the ultrasonic signal of 40 ± 1kHz, and signal abnormal ultrasonic signal after electric loop is handled is converted into audible
Sinusoidal signal and waveform directly perceived simultaneously export, and user can clearly differentiate strength of discharge according to sound and waveform；When the ultrasound that notes abnormalities
After signal, using laser detector or high definition telescope camera multi-angle trouble-shooting direction, detecting location is wanted in accurate positionin；
Data acquisition and record can be carried out to hidden danger point afterwards, such as records ultrasound data waveform, record test position time and data
File such as photographs to record at the hidden danger direction；User can also be established database using inspection daemon software and data are carried out
Analysis, and print correlation report.
Display screen is color touch screen, can the information such as display waveform, dB values, humiture and GPS.Device has multiple simultaneously
External tapping such as earphone interface, SD card slot, RS232, spare USB interface, charging interface.Earphone interface is defeated for audio signal
Go out, it is therefore prevented that interference of the external sound to testing staff；SD card slot is used to be inserted into SD storage cards, extension storage capacity；RS232 is
Debugging serial ports；Spare USB interface, can be not only used for debugging also can external access of mouse keyboard etc.；Charging interface charges for grafting
Device.Device is powered by internal battery, without external power supply.
The detecting step of ultrasonic partial discharge failure is as follows：
A. keep the position of ultrasonic partial discharge detector constant, poly- ripple device is directed at electrical equipment to be measured and is constantly adjusted
The axis direction (i.e. detection direction) of poly- ripple device, while the ultrasonic signal received by display screen observation ultrasonic sensor
Intensity, when the maximum intensity of ultrasonic signal, the laser facula on the position A1 and electrical equipment of recording laser transmitter
Position B1, then spatial line segment A1B1 is that this detects obtained trajectory of the laser beam；
When detecting, trajectory of the laser beam can whether there is several, but only one is easily recognized, i.e., at laser facula,
That trajectory of the laser beam vertical with equipment surface is most worthy.Therefore, during searching, trajectory of the laser beam is adjusted
Make it vertical with the equipment surface at laser facula, take position of the laser facula on equipment under test with camera, remembered
The equipment under test picture of laser facula is recorded.
In this way, when maintenance personal finds partial discharge trouble point using above-mentioned photo, the laser facula on equipment under test picture
The vertical line at place is the direction of a ultrasound beamformer of partial discharge trouble point transmitting, and partial discharges fault point is also necessarily present in sharp
On the extended line of vertical line at light hot spot.
It is inadequate only there are one laser facula to determine the specific location of partial discharge trouble point, it is necessary to second is found,
For this purpose, following step must also be taken.
B. change the position of ultrasonic partial discharge detector, repeat the operation of step a, the position A2 and electricity of recording laser transmitter
Laser spot position B2 in gas equipment obtains the trajectory of the laser beam A2B2 of second of detection；
C. the extending line intersection point of line segment A1B1 and A2B2 is sought, this intersection point is the specific location of partial discharges fault.
Claims (9)
1. a kind of detection method of partial discharge of electrical equipment, it is characterized in that, the method utilizes a partial discharge detection device, in office
It puts and ultrasonic partial discharge inspection device and laser emitter is equipped in detection device；Ultrasonic wave direction of the launch center line and laser are set
The center line of the direction of the launch overlaps, and inspection device is directed at electrical equipment to be measured by the position selected in space, by adjusting
Detection direction makes received ultrasonic signal most strong, the laser light on the position and electrical equipment of recording laser transmitter
Spot position, and then the trajectory of the laser beam of laser emitter is obtained, trajectory of the laser beam is the center line of the ultrasonic wave direction of the launch；It adjusts
Whole trajectory of the laser beam makes it vertical with the equipment surface at laser facula, and laser facula is taken on equipment under test with camera
Position obtains having recorded the equipment under test picture of laser facula.
2. detection method of partial discharge of electrical equipment according to claim 1, it is characterized in that, it is obtained in change trajectory of the laser beam
During taking equipment surface laser hot spot, adjustment trajectory of the laser beam makes it vertical with the equipment surface at laser facula, with taking the photograph
As head takes position of the laser facula on equipment under test, obtain having recorded the equipment under test picture of laser facula, equipment under test
The vertical line at laser facula on picture is a ultrasound beamformer of partial discharge trouble point transmitting, and partial discharges fault point also must
So it is present on the extended line of the vertical line at laser facula；
The position for changing inspection device is detected again, acquires the intersection point of detection gained trajectory of the laser beam extended line twice, i.e.,
Obtain the space specific location of partial discharges fault point.
3. detection method of partial discharge of electrical equipment according to claim 1, it is characterized in that, gained laser beam is detected twice
Angle between track is 80~100 degree.
4. a kind of ultrasonic partial discharge detector detected for the local discharge of electrical equipment as described in claim any one of 1-3,
It is characterized in that the composition of the ultrasonic partial discharge detector includes tubaeform poly- ripple device (1), sonac (3), display screen
(13), metal shell (9) and ultrasonic preamplification board (5), metallic shield (6), laser hair in metal shell (9)
Emitter (7) and master control borad (12), the antetheca of the metal shell (9) is metal installation base (2), and rear wall installs display screen (13)；
The poly- ripple device (1) is fixed on metal installation base (2) forepart；The sonac (3) is inlaid in the logical of metal installation base (2)
In hole and in the focus of poly- ripple device (1), the ultrasound preamplification board (5) is mounted on metal installation base (2) and metal screen
It covers in the cavity that cover (6) surrounds, the output terminal of sonac (3) passes through ultrasonic preamplification board (5) and master control borad (12)
Input terminal connects, the output termination display screen (13) of the master control borad (12)；The laser emitter (7) is mounted on metallic shield
Cover the rear portion of (6), the laser that laser emitter (7) is sent sequentially pass through metallic shield (6), ultrasonic preamplification board (5) and
It is radiated at after laser vias in metal installation base (2) on detected electrical equipment, the laser mistake of the metal installation base (2)
Hole is sealed by transmissive mirror (4).
5. a kind of ultrasonic partial discharge detector according to claim 4, it is characterized in that, GPS module is further included in composition
(10), the GPS module (10) is mounted on the top of metal shell (9), the output termination master control borad (12) of GPS module (10)
Input terminal.
6. a kind of ultrasonic partial discharge detector according to claim 5, it is characterized in that, camera is further included in composition
(11), the camera (11) is mounted on the top of metal shell (9) and, camera corresponding with detected electrical equipment
(11) input terminal of signal output termination master control borad (12).
7. a kind of ultrasonic partial discharge detector according to claim 6, it is characterized in that, the metal shell (9) is equipped with
With the Temperature Humidity Sensor that master control borad (12) is connected with USB (15).
8. a kind of ultrasonic partial discharge detector according to claim 7, it is characterized in that, the lower part of the metal shell (9)
Equipped with hand-held shank type battery case (14), battery in battery case (14) passes through the power supply that is arranged in metal shell (9)
Plate (8) is given ultrasonic preamplification board (5), laser emitter (7), GPS module (10), camera (11), master control borad (12) and is shown
Display screen (13) is powered.
9. a kind of ultrasonic partial discharge detector according to claim 8, it is characterized in that, the internal reflection of the poly- ripple device (1)
Face is parabola.
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| CN201711332408.9A CN108120905A (en) | 2017-12-13 | 2017-12-13 | A kind of detection method of partial discharge of electrical equipment and its detection device |
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| CN201711332408.9A CN108120905A (en) | 2017-12-13 | 2017-12-13 | A kind of detection method of partial discharge of electrical equipment and its detection device |
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Cited By (12)
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| CN108776288A (en) * | 2018-07-25 | 2018-11-09 | 杭州顿恒科技有限公司 | A kind of novel local On-line Discharge monitoring device based on wireless aware |
| CN109030374A (en) * | 2018-08-16 | 2018-12-18 | 上海禾赛光电科技有限公司 | Data managing method and data management terminal for laser gas detector |
| CN109444698A (en) * | 2018-12-26 | 2019-03-08 | 国网上海市电力公司 | A kind of substation's partial discharge monitoring ultrasonic scanning array apparatus |
| CN109669110A (en) * | 2019-02-28 | 2019-04-23 | 哈尔滨理工大学 | Sound focusing sensor and PD On-Line Measurement System and its detection method for shelf depreciation on-line checking |
| CN109917249A (en) * | 2019-04-03 | 2019-06-21 | 国网陕西省电力公司电力科学研究院 | A kind of shelf depreciation positioning device and method for the patrol unmanned machine of power equipment |
| CN110596550A (en) * | 2019-09-25 | 2019-12-20 | 哈尔滨理工大学 | Ultrasonic sensor for detecting partial discharge signal of generator |
| EP3715882A1 (en) * | 2019-03-20 | 2020-09-30 | Seba-Dynatronic Mess- und Ortungstechnik GmbH | Measuring receiver and measuring device for detecting partial discharges |
| CN112034315A (en) * | 2020-08-27 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Hand-held charging type partial discharge detection positioning instrument |
| CN112130033A (en) * | 2020-08-25 | 2020-12-25 | 广西电网有限责任公司南宁供电局 | Cable partial discharge noise signal detection device |
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| CN114088816A (en) * | 2021-11-25 | 2022-02-25 | 南京谷贝电气科技有限公司 | Calibration system for air type ultrasonic partial discharge detection device |
| CN117471260A (en) * | 2023-12-26 | 2024-01-30 | 河北大学 | Cable insulation detects and trouble early warning positioner |
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Cited By (15)
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| CN108776288A (en) * | 2018-07-25 | 2018-11-09 | 杭州顿恒科技有限公司 | A kind of novel local On-line Discharge monitoring device based on wireless aware |
| CN109030374A (en) * | 2018-08-16 | 2018-12-18 | 上海禾赛光电科技有限公司 | Data managing method and data management terminal for laser gas detector |
| CN109444698A (en) * | 2018-12-26 | 2019-03-08 | 国网上海市电力公司 | A kind of substation's partial discharge monitoring ultrasonic scanning array apparatus |
| CN109669110A (en) * | 2019-02-28 | 2019-04-23 | 哈尔滨理工大学 | Sound focusing sensor and PD On-Line Measurement System and its detection method for shelf depreciation on-line checking |
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Application publication date: 20180605 |