CN108445367A - Portable partial discharge detector based on ultrasound - Google Patents
Portable partial discharge detector based on ultrasound Download PDFInfo
- Publication number
- CN108445367A CN108445367A CN201810522322.0A CN201810522322A CN108445367A CN 108445367 A CN108445367 A CN 108445367A CN 201810522322 A CN201810522322 A CN 201810522322A CN 108445367 A CN108445367 A CN 108445367A
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- circuit
- host
- ultrasound
- partial discharge
- ultrasonic
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Classifications
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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
Abstract
The invention discloses a kind of Portable partial discharge detector based on ultrasound, including ultrasonic acquisition equipment and host, by rotation axis Connection Bracket, the rotation axis is driven by motor to be rotated the ultrasonic acquisition equipment；The ultrasonic acquisition equipment includes ultrasonic acquisition circuit, for acquiring ultrasonic signal；The host is inside provided with mapping module, the mapping module built-in monitoring power grid point line map is positioned by GPS and determines current detection position in real time, and when detecting electric leakage, label point of discharge is numbered and record position information for controlling and handling.The detector can be installed on mobile vehicle, carry out the detection of extensive range, can greatly improve detection efficiency.
Description
Technical field
The invention belongs to the safety detection technology fields of high voltage power transmission electrical equipment, and ultrasonic wave is based on more particularly to one kind
Portable partial discharge detector and method.
Background technology
Distribution network voltage strength is continuously increased, the high voltage electric equipment in distribution network such as transformer, high-voltage switch gear
Insulating materials in the equipment such as cabinet, cable accessory is also increasingly susceptible to problem.Partial Discharge Detecting Technology is used as one kind most
Effectively, most reliable detection method achieves certain effect in the performance test of all kinds of insulating materials.About shelf depreciation
Detection, has a kind of traditional method to be called preventive trial, and this method is to be detected in the state of power-off, and do not meet full
The requirement of sufficient on-line checking can not embody the flash-over characteristic of electrical equipment under high voltages.Heavy workload, of high cost, experiment
Difficulty makes greatly preventive trial that can neither detect failure very well, and spends human and material resources, institute in this way science and technology promptly
It is not widely used today.
Nowadays, the detection method for local discharge of mainstream is all on-line checking, and does not interfere with the normal operation of equipment.Office
Portion electric discharge as high-voltage power distribution equipment occur insulation fault occur omen, it is generated signal feature carry out understand analyze be
It is highly desirable.It can help to reduce casualties or economic loss caused by electric power accident using these features.This
The phenomenon that a little electric discharge phenomena are supervened may be the various physical phenomenons such as sound wave, light wave, fever, electric pulse.By to these
The detection and quantitative analysis of phenomenon, can not only allow staff's principle electrical equipment as possible, improve detection safety and can
By property, moreover it is possible to increase the validity of detection, match to high pressure so contactless shelf depreciation online measuring technique has become
The main method of electric equipment diagnosis.
Although also having Portable partial discharge detector at present, such as the patent that notification number is CN 103926513 discloses
A kind of portable supersonic on-line checking shelf depreciation diagnostic device, staff take and hold hand-held part 4, will expand the big mouth for visiting cylinder 8
Diameter end 8-1 carries out online scanning to electrical equipment under test and carries out wide scope detection for the first time using the first ultrasonic detecting probe, really
Determine the approximate range of shelf depreciation, then exchanges the second ultrasonic detecting probe for and carry out second of exact extension detection.The device needs
Detection setting is held, is unfavorable for detecting on a large scale, by adjusting the first ultrasound examination and the second ultrasound examination manually,
It is cumbersome, working efficiency can not be improved.
Invention content
In view of the above technical problems, the present invention provides a kind of Portable partial discharge detectors based on ultrasound.It should
Detector can be installed on mobile vehicle, carry out the detection of extensive range, can greatly improve detection efficiency.
The technical scheme is that：
A kind of Portable partial discharge detector based on ultrasound, including ultrasonic acquisition equipment and host, the ultrasonic wave
By rotation axis Connection Bracket, the rotation axis is driven by motor to be rotated collecting device；
The ultrasonic acquisition equipment includes ultrasonic acquisition circuit, for acquiring ultrasonic signal；
The host is inside provided with mapping module, the mapping module built-in monitoring power grid point circuit for controlling and handling
Figure is positioned by GPS and determines current detection position in real time, when detecting electric leakage, label point of discharge number and record position letter
Breath.
In preferred technical solution, the ultrasonic acquisition equipment further includes receiving circuit, Acquisition Circuit and frequency changer circuit；
The receiving circuit includes front end receiver circuit, pretreatment circuit and gain adjustable amplifying circuit；The Acquisition Circuit includes super
Sound collecting circuit, RMS-DC converter circuit and audio playing circuit；The frequency changer circuit include carrier circuit, filter circuit and
Mixting circuit.
In preferred technical solution, the ultrasonic acquisition equipment further includes display control circuit, the display control electricity
Road includes control circuit and display module.
In preferred technical solution, the ultrasonic acquisition equipment further includes environment information acquisition module, the environment letter
Breath acquisition module includes at least Temperature Humidity Sensor for acquiring environmental information.
In preferred technical solution, the host is when detecting electric leakage, according to the data of ultrasonic acquisition equipment acquisition
And measurement distance, judge the degradation of current electrical equipment.
In preferred technical solution, the fixed frame is connected to movable carrier.
In preferred technical solution, the host is communicated with ultrasonic acquisition equipment room by the way of 485 buses,
Communication data is encrypted by CRC check, and host uninterruptedly sends inquiry instruction to ultrasonic acquisition equipment, and collecting device exists
After receiving the instruction, the data in corresponding registers are inquired, host is returned to.
In preferred technical solution, the synchronizing information of the currently monitored power grid point of discharge is transmitted to based on high in the clouds by the host
The big data platform of Saprk, using based on Spark memories high-speed execution engine and Hbase databases record each power grid in real time
The monitoring information of line discharge point utilizes the real-time calculating of Spark Streaming by the map api interface of mapping module
The real-time analyzing processing of interface and map API of frame monitors power grid point data stream, and the user for forming monitoring point of discharge big data draws
Picture simultaneously passes through visual display systems real-time display.
In preferred technical solution, the big data platform based on high in the clouds Saprk by monitoring record and historical record into
Row compares, and when finding that degradation is high, reminds staff's on-call maintenance equipment in real time.
Compared with prior art, it is an advantage of the invention that：
1, the detector is simple in structure, can be installed on mobile vehicle, is positioned in real time by GPS and determines current detection position, when
When detecting electric leakage, label point of discharge number and record position information can carry out the detection of extensive range, and detection is more accelerated
Victory can greatly improve detection efficiency.
2, using based on Spark memories high-speed execution engine and Hbase databases record each power network line in real time and discharge
The monitoring information of point utilizes the real-time calculation block of Spark Streaming by the Baidu map api interface of mapping module
The abundant interface of frame and API carry out real-time analyzing processing and monitor power grid point data stream, and the user for forming monitoring point of discharge big data draws
This time is finally recorded and is quickly compared with historical record by picture and the display systems for carrying out real-time visual, when discovery deteriorates journey
Height is spent, reminds staff's on-call maintenance equipment in real time.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is testing principle schematic diagram of the present invention；
Fig. 2 is that the present invention is based on the structural schematic diagrams of the Portable partial discharge detector of ultrasonic wave；
Fig. 3 is the hardware chart of ultrasonic acquisition equipment of the present invention；
Fig. 4 is the structural schematic diagram of host equipment of the present invention；
Fig. 5 is present invention pretreatment circuit diagram；
Fig. 6 is amplification circuit diagram of the present invention；
Fig. 7 is mixting circuit structure chart of the present invention；
Fig. 8 is message processing flow figure of the present invention；
Fig. 9 is that USB port of the present invention upgrades flow.
Specific implementation mode
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment：
In conjunction with the drawings and specific embodiments, the invention will be further described：
As shown in Figure 1, a kind of Portable partial discharge detector based on ultrasound, detector consist of two parts, are divided into and adopting
Collect equipment and host equipment.Collecting device is mainly used to acquire ultrasonic signal, RMS virtual values and aerial temperature and humidity information, and
And by rotary handle, provides power by motor and rotated, it can be with 360 degree of detection environmental informations.Host equipment includes
Display and storage card are positioned first by map denotation power network line figure by GPS in real time, to determine current detection position,
Secondly earpiece volume and signal amplification factor can also be configured, and possesses the function of recording, high-voltage electricity is carried out with this
The detection of electrical leakage of circuit.It is transmitted with certain format using 485 communications, signal between collecting device and host equipment.Acquisition
To audio signal be stored in SD card, copying in PC signal to piecemeal records, and generates corresponding historical data base, passes through
Comparison carries out Analysis of Partial Discharge.
The structure of ultrasonic acquisition equipment as shown in Fig. 2, ultrasonic acquisition equipment includes shell 1, be provided on shell 1 by
The acquisition main body of key 6, ultrasonic acquisition equipment is arranged in shell 1, and shell 1 passes through 5 Connection Bracket 2 of rotation axis, rotation axis 5
It is rotated 360 ° by motor driving, there is earphone hole 7 in 1 side of shell, display module 4 is additionally provided on shell 1, such as can be
Touch screen.
The circuit of ultrasonic acquisition equipment following five part as shown in figure 3, be mainly made of, receiving circuit, variable-frequency electric
Road, Acquisition Circuit, display and control circuit and power circuit.Receiving circuit includes front end receiver circuit, pretreatment circuit and increasing
Beneficial adjustable amplifying circuit；Frequency changer circuit includes carrier circuit, filter circuit and mixting circuit；Acquisition Circuit contains ultrasonic wave and adopts
Collector, RMS-DC converter circuit and audio playing circuit.Display control circuit contains 485 circuits, humiture circuit, screen
With SD card circuit；Power circuit contains equipment startup and regulator circuit.
Ultrasonic acquisition circuit receives signal, is pre-processed first, removes noise wave removing, is then put by amplifying circuit
Greatly, signal mixing and filtering is then obtained into the audio signal of the required human ear range of audibility.The audio signal is divided into three
Road carries out RMS-DC converter (RMS), carries out signal acquisition all the way all the way, carries out audio broadcasting all the way, wherein audio-frequency information and has
Valid value is by 485 circuit transmissions to host.On the one hand power circuit provides the voltage of 5V, 3.3V and 2.5V, another party to equipment
The switching that start-up circuit in the circuit of face provides three kinds of states by a button to equipment is grown if collecting device is not actuated
By booting, long-press is shut down if equipment has been started up, short-press switching recording.
As shown in figure 4, main machine structure includes the tangibly liquid crystal display 20 being arranged in front, it is arranged on shell
Charging interface and bus interface 23 in shell side is arranged for putting the audio signal received outside in loud speaker 21.
Since the ultrasonic wave crest frequency that different electrical equipments generate is different, in using and being with 40KHz and 80KHz
The ultrasonic sensor of frequency of heart, is switched over by host.It need to be only arranged and sensor frequency phase by host in switching
Corresponding carrier wave can pass through headphone monitor discharge information.
As shown in figure 5, in circuit, wherein capacitance C9 be for removing flip-flop and low-frequency component in electric signal,
Resistance R3 is connected with GND, and resistance R2 is connected with 5V voltages, and effect is that the bias voltage of setting input signal is on one side
On the other hand 2.5V improves signal driving capability.Then the amplitude limiter circuit that signal is constituted by a diode by one, wherein D1 connect
Power supply, D2 are grounded to form diode clamping circuit, which can limit output when signal is excessive, to prevent below
Component is damaged because voltage is excessive.
As shown in fig. 6, in order to collect most authentic and valid type local-discharge ultrasonic wave signal, the distortion of acquisition signal is reduced, is adopted
Gain design is carried out with AD605, gain adjustable amplifying circuit considers the noise and gain situation of amplifying circuit, can to amplify
Gain can reach 80dB.
Ultrasonic signal is mainly transformed into the audible sound frequency of human ear by frequency changer circuit.The circuit model of frequency changer circuit is such as
Shown in Fig. 7.Wherein us (t) is amplified input waveform, is ul (t) by the carrier wave that frequency generator AD9833 is generated.Pass through
Signal after MC1496 is multiplied is uo (t), is output waveform ui (t) after low-pass filtering.
Display module uses USART HMI Intelligent touch serial ports screens, and ultrasonic signal amplification may be implemented in display module can
The coefficient that controls and can be changed by touch screen signal amplification, into the transmission of row information between screen and equipment, by presentation of information
On the screen, such as the amplification coefficient of signal, the volume of equipment, the information such as humiture of environment.Screen can also be shown by GPS
The interface of local circuit network map, and provide ground point location at that time.
It is communicated by the way of 485 buses between host and collecting device.In normal operation, host can not
It is interrupted to collecting device and sends inquiry instruction, collecting device is after receiving the instruction, the number in inquiry corresponding registers of going back
According to returning to host.Communication data is encrypted by CRC check, and transformat is as shown in the following table 1, table 2.
1 host transmission data of table
| Number | Order | Value | CRC |
| 0x01 | 0x0a | 0x01 | 0xe7 0x60 |
2 host transmission data of table
| Number | Temperature | Electricity | Virtual value | VOL | VGN | CRC |
| 0x01 | 0x01 0xff | 0xbb | 0xcc | 0x01 | 0x02 | 0x7a 0x8f |
When being recorded, data are transmitted by 512 bytes, are transmitted to after host there are in SD card, acquisition is transmitted
The general 30s of data.
Host is built-in with mapping module, and mapping module includes map api interface（For example, Baidu map api interface etc.）With
Power grid point line map is monitored, is positioned in real time by GPS and determines current detection position, when detecting electric leakage, record position information.
Reception collecting device is transmitted through the information such as humiture, amplification coefficient, the volume come and judges currently electrically to set according to measurement distance
Standby degradation, while indicating that point of discharge is numbered in a device, it being capable of real-time query point of discharge historic state.Simultaneously when acquisition
In recording state, audio signal is stored in the format of WAV in SD card equipment by mian engine changeover recording.Host equipment includes
The synchronizing information of the currently monitored power grid point of discharge can be transmitted to the big data platform based on high in the clouds Saprk, utilize base by 4G modules
The monitoring letter of these each power network lines electric discharge points is recorded in real time in the high-speed execution engine and Hbase databases of Spark memories
Breath, by the Baidu map api interface of mapping module, utilizes the interface that the real-time Computational frame of Spark Streaming is abundant
Carry out real-time analyzing processing with API and monitor power grid point data stream, the user for forming monitoring point of discharge big data draws a portrait and carries out in real time
This time is finally recorded and is quickly compared with historical record by visual display systems, when finding that degradation is excessively high, is carried in real time
Awake staff's on-call maintenance equipment.As shown in Figure 8.
Fixed frame 2 may be mounted on movable carrier, such as roof, when mobile unit inspection, secure the equipment in vehicle
Top, small machine, which is powered, after system is opened starts to rotate drive shaft rotation, and main automatic rotary turns to start whether detection surrounding has high pressure
Line electric discharge phenomena.
The host system provides USB port upgraded module, upgrades to host equipment convenient for user, is divided in real time with realizing
The function of analysis.User only needs in newest program copy to USB flash disk, then by the USB port of the host equipment, the subsequent net
Closing the content in the USB flash disk can be written in the FLASH chip of gateway, finally restart to equipment.So far, in embedded gateway
Program be replaced by latest edition.The flow chart of the process is as shown in Figure 9.
In use, first opening the button 6 above host housing 1, system starts, and then equipment drives shaft 5 by motor
Horn bulb is rotated, has earphone hole 7 on the left of shell, puts on earphone, monitor ambient sound at this time, be then aligned with high-tension line,
If high-voltage line generates electric discharge, apparent audio can be listened to by earphone and changed.Amplification coefficient, energy can be arranged in screen 4
It is switched to the route of power grid by GPS, and shows the index of ambient enviroment.Under open state, short-press button 5 can switch
To recording state, and will treated signal by connector and main-machine communication, be stored in the SD card of host as record, record
Data afterwards can be used as the reference of later periodic detection, and long-press button 5 shuts down.Equipment moveable position is specific to find
The position of high-voltage line electric leakage, more than traditional artificial detection safe and convenient.
It should be understood that the above-mentioned specific implementation mode of the present invention is used only for exemplary illustration or explains the present invention's
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (9)
1. a kind of Portable partial discharge detector based on ultrasound, which is characterized in that including ultrasonic acquisition equipment and master
Machine, by rotation axis Connection Bracket, the rotation axis is driven by motor to be rotated the ultrasonic acquisition equipment；
The ultrasonic acquisition equipment includes ultrasonic acquisition circuit, for acquiring ultrasonic signal；
The host is inside provided with mapping module, the mapping module built-in monitoring power grid point circuit for controlling and handling
Figure is positioned by GPS and determines current detection position in real time, when detecting electric leakage, label point of discharge number and record position letter
Breath.
2. Portable partial discharge detector based on ultrasound according to claim 1, which is characterized in that the ultrasound
Wave collecting device further includes receiving circuit, Acquisition Circuit and frequency changer circuit；The receiving circuit includes front end receiver circuit, pre- place
Manage circuit and gain adjustable amplifying circuit；The Acquisition Circuit includes ultrasonic acquisition circuit, RMS-DC converter circuit and audio
Playing circuit；The frequency changer circuit includes carrier circuit, filter circuit and mixting circuit.
3. Portable partial discharge detector based on ultrasound according to claim 2, which is characterized in that the ultrasound
Wave collecting device further includes display control circuit, and the display control circuit includes control circuit and display module.
4. Portable partial discharge detector based on ultrasound according to claim 2, which is characterized in that the ultrasound
Wave collecting device further includes environment information acquisition module, and the environment information acquisition module is at least wrapped for acquiring environmental information
Include Temperature Humidity Sensor.
5. according to claim 1-3 any one of them Portable partial discharge detector based on ultrasound, which is characterized in that
The fixed frame is connected to movable carrier.
6. Portable partial discharge detector based on ultrasound according to claim 1, which is characterized in that the host
When detecting electric leakage, according to data and measurement distance that ultrasonic acquisition equipment acquires, the bad of current electrical equipment is judged
Change degree.
7. Portable partial discharge detector based on ultrasound according to claim 1, which is characterized in that the host
It is communicated by the way of 485 buses with ultrasonic acquisition equipment room, communication data is encrypted by CRC check, host
Inquiry instruction uninterruptedly is sent to ultrasonic acquisition equipment, collecting device is inquired after receiving the instruction in corresponding registers
Data, return to host.
8. Portable partial discharge detector based on ultrasound according to claim 1, which is characterized in that the host
The synchronizing information of the currently monitored power grid point of discharge is transmitted to the big data platform based on high in the clouds Saprk, using based on Spark memories
High-speed execution engine and Hbase databases record the monitoring information of each power network line point of discharge in real time, pass through mapping module
Map api interface is monitored using the real-time analyzing processing of the interface and map API of the real-time Computational frame of Spark Streaming
Power grid point data stream, the user for forming monitoring point of discharge big data draw a portrait and pass through visual display systems real-time display.
9. Portable partial discharge detector based on ultrasound according to claim 1, which is characterized in that described to be based on
Monitoring record is compared by the big data platform of high in the clouds Saprk with historical record, when finding that degradation is high, is reminded in real time
Staff's on-call maintenance equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522322.0A CN108445367A (en) | 2018-05-28 | 2018-05-28 | Portable partial discharge detector based on ultrasound |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522322.0A CN108445367A (en) | 2018-05-28 | 2018-05-28 | Portable partial discharge detector based on ultrasound |
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Family
ID=63204689
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| CN201810522322.0A Pending CN108445367A (en) | 2018-05-28 | 2018-05-28 | Portable partial discharge detector based on ultrasound |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160634A (en) * | 2019-06-06 | 2019-08-23 | 内蒙古电力（集团）有限责任公司内蒙古超高压供电局 | Reactor abnormal sound measuring device and its method |
| CN111983523A (en) * | 2020-08-24 | 2020-11-24 | 国网上海市电力公司 | Transformer running state data acquisition and analysis system and method based on big data platform |
| 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 |
| CN112526387A (en) * | 2020-10-30 | 2021-03-19 | 浙江王奇检测技术有限公司 | Non-contact power distribution equipment detection method |
| CN113301147A (en) * | 2021-05-21 | 2021-08-24 | 广东电网有限责任公司 | Partial discharge data processing system based on data transmission |
| CN113707161A (en) * | 2021-09-22 | 2021-11-26 | 珠海华网科技有限责任公司 | Method for playing partial discharge signal audio based on ZYNQ platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113301147A (en) * | 2021-05-21 | 2021-08-24 | 广东电网有限责任公司 | Partial discharge data processing system based on data transmission |
| CN113707161A (en) * | 2021-09-22 | 2021-11-26 | 珠海华网科技有限责任公司 | Method for playing partial discharge signal audio based on ZYNQ platform |
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Application publication date: 20180824 |
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