CN106154125A - A kind of magnetic starting shelf depreciation method for wirelessly testing and device - Google Patents
A kind of magnetic starting shelf depreciation method for wirelessly testing and device Download PDFInfo
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- CN106154125A CN106154125A CN201610164720.0A CN201610164720A CN106154125A CN 106154125 A CN106154125 A CN 106154125A CN 201610164720 A CN201610164720 A CN 201610164720A CN 106154125 A CN106154125 A CN 106154125A
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Abstract
The present invention provides a kind of magnetic starting shelf depreciation method for wirelessly testing and device.This device includes background processor and multiple front-end acquisition device.The present invention passes through magneto sensor induced field, thus determines whether shelf depreciation occur.When there is not shelf depreciation, the data gathered only are temporarily stored, and will not be transferred into background processor；When shelf depreciation occurs, after the data gathered are stored, at once or periodically sent to backstage as required and carried out integrated treatment.The present invention can be greatly reduced the load being wirelessly transferred, it is ensured that critical data can reliably be transmitted to background processor.Shelf depreciation multimode signal is analyzed processing by the present invention, and the interference source suffered by distinct methods is different, is combined by several method, can carry out complementation, improves accuracy of detection.System of the present invention has the advantages such as detection sensitivity is high, low in energy consumption, accuracy of detection is high, use is flexible, is conducive to power equipment is carried out multidrop continuous detection.
Description
Technical field
The present invention relates to Partial Discharge Detection field, trigger the shelf depreciation distributed multimode started particularly to a kind of magnetic
Wireless continuous detecting method and device.
Background technology
Electric power is the basic industry of national economy and important public utilities.One national electrifing degree is to weigh it
The major criterion of social modernization's level.China's power industry is always maintained at stable development.At present, China's electrical network scale has surpassed
Crossing the U.S. and leap to No. 1 in the world, capacity of installed generator ranks the second in the world.
Along with socioeconomic development and the improvement day by day of people's lives, to the degree of dependence of electric power with to electric power system stability
Requiring more and more higher qualitatively, economic asset loss and social influence that electric power safety accident causes are the most increasing.According to conservative
Estimate, even if not considering the huge investment of invalid maintenance, the electricity that the whole nation is lost due to interruption maintenance or cause of accident every year
Up to 30,000,000,000 kWh, if sales rate of electricity is calculated by 0.4 yuan/kWh, direct economic loss reaches 12,000,000,000 yuan.If weighed according to China
The ratio that direct losses, indirect loss and social loss are 1:4:6 that prestige department points out calculates, and indirect loss and social loss divide
Gao Da 48,000,000,000 yuan and 72,000,000,000 yuan.
The quality of Electric Power Equipment Insulation situation directly affects the safe operation of power system.It has been reported that to 110kV and with
The result of upper 93 analysis on accident cause of large-scale power transformer shows, the accident of about 80% is caused by insulation damages.According to
IEEE adds up, and the electric fault of high-tension electricity equipment 90% is caused by insulation degradation.According to standards such as IEC, IEEE, GB,
Measurement of partial discharge is the important method of Electric Power Equipment Insulation quality evaluation, can correctly differentiate such as to pollute by shelf depreciation, heat
The insulation defect that cracking, manufacturing defect etc. cause.
At present, China's power equipment Partial Discharge Detection is patrolled and examined based on human at periodic intervals.But, along with power equipment quantity
Swift and violent increase, detection needs a large amount of manpower and materials, all devices is carried out regular visit obvious and unrealistic.And, periodically
Although patrolling and examining it appeared that the latent defect of equipment and fault, but first it having the disadvantage that, it cannot provide equipment local
Electric discharge state change within a period of time, thus, it is unfavorable for accurately judging the potential problems of equipment；Secondly, the discovery of problem
Often lagging far behind the appearance of problem, this makes equipment can not be overhauled early and safeguard.As can be seen here, power equipment local
The continuous automatic inspection of electric discharge is trend of the times.
Shelf depreciation, with its various phenomenons produced as foundation, has various test, such as pulse current method, ultrasound wave
Method, Electromagnetic Wave Method, infrared thermal method, flash spotting, dielectric loss method, gas chromatography etc..Various methods all can be by different
Interference, such as, pulse current method is vulnerable to the electromagnetic interference of external circuit, and supercritical ultrasonics technology can be disturbed by peripheral machinery noise
Deng, the accuracy of detection can be largely effected on.Therefore, need badly and seek a kind of anti-interference higher, higher detection method of sensitivity.
Additionally, no matter use which kind of method, to realize continuous automatic inspection, need constantly collection relevant to shelf depreciation
Status data.And every time the discharge process persistent period the shortest, be 10ns magnitude in air gap, and in oil clearance, be about 1us.
Therefore, signal packet is containing abundant frequency content, and bandwidth reaches MHz, even close to GHz in some medium.According to Nyquist
Sampling thheorem, to undistorted recovery signal, sample rate need to be more than 2 times of signal bandwidth.If so will acquisition office as far as possible
The more information of portion's discharge process, sample rate must be sufficiently large.Such as: if signal bandwidth 1MHz, sample rate needs to be more than
2MS/s, it is assumed that carry out 10-bit quantization, the sampled data output produced the most therefrom is at least 20Mbps.Existing shelf depreciation
Continuous detection apparatus is all, by cable, front-end detection device and background processor are carried out wired connection, in order to transmission is gathered
Mass data to backstage.But, wired connection causes the spatial distribution critical constraints of front-end detection device, uses the most ineffective
Live.If employing wireless transmission method, the motility of whole detecting system will be greatly improved, but existing wireless transmission rate is difficult
To meet the transmission requirement of mass data.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that a kind of magnetic triggers the shelf depreciation started
Distributed multimode is wireless continuous detecting method and device.
A kind of magnetic starting shelf depreciation wireless detection device, including background processor and multiple front-end acquisition device, front end
Harvester can acquisition monitoring point ultrasonic signal, the signal of telecommunication and infrared signal and by wireless network to background processor pass
Send data；Described front-end acquisition device include magnetic induction module, sound induction module, electric induction module, infrared induction module, time
Clock, switch, memory element, data transmission control module, wireless transmitter module；It is many that front-end acquisition device is distributed in power equipment
Individual control point, and press close to power equipment, and between each control point, keep setpoint distance, to guarantee when there is shelf depreciation,
The front-end acquisition device of unrelated control point will not be interfered by produced magnetic field, produces erroneous judgement；Can acquisition monitoring point
Ultrasonic signal, the signal of telecommunication and infrared signal；Electric power, according to collected multiple Partial Discharge Data, is set by described background processor
The standby degree of insulation degradation, position judge；Described data transmission control module controls data in valid data memory element
Send the transmission time to backstage and transmission order；Data by being wirelessly transferred, are sent to background process by wireless transmitter module
Device.
Further, described magnetic induction module is made up of magneto sensor, for induced field, has higher sensitivity；Root
According to the intensity of institute's induced field, decide whether to send enabling signal, when magnetic field intensity exceedes default threshold value, it is determined that occur
Shelf depreciation, and send enabling signal.
Further, described memory element is divided into temporary storage cell and valid data memory element, temporary storage cell
Gathered data can be preserved, when reaching the memory capacity of temporary storage cell, by storage time order and function, by new data temporarily
Cover legacy data；Valid data memory element memory capacity is bigger than temporary storage cell, can store repeatedly the complete of shelf depreciation
Data, and data will be transferred into background processor.
Further, the enabling signal that described switch is sent by magnetic induction module controls, and when enabling signal being detected, opens
Close Guan Bi so that the data of temporary storage cell enter valid data memory element；When being not detected by enabling signal, switch is protected
Holding open mode, the data of temporary storage cell can not enter valid data memory element.
Further, described sound induction module, electric induction module and infrared induction module, gather ultrasonic signal, electricity respectively
Signal and infrared signal, the data gathered and corresponding clock information are stored to corresponding temporary storage cell.
Utilizing the detection method of above-mentioned magnetic starting shelf depreciation wireless detection device, detailed process includes: device starts work
After work, magnetic induction module, sound induction module, electric induction module, infrared induction module start simultaneously at sensing；Magnetic induction module according to
The intensity of institute's induced field, decides whether to send enabling signal；When magnetic field intensity is more than or equal to predetermined threshold valueBTTime, send
Enabling signal；When less than threshold valueBTTime, do not send enabling signal；Sound induction module, electric induction module, infrared induction module
Gathering ultrasonic signal, the signal of telecommunication and infrared signal respectively, the data gathered are preserved to phase respectively with corresponding clock information
The temporary storage cell answered；Switch module open or close by enabling signal control, when enabling signal being detected, switch closes
Closing, the data of temporary storage cell by respective switch module, enter into corresponding valid data memory element respectively, wait
It is sent to background processor；If the enabling signal of being not detected by, switch remains on, and the data of temporary storage cell can not
It is sent to valid data memory element, and after the setting time, is covered by new data；The data of valid data memory element are counting
According under the control of transmission control module, according to parameter set in advance, in the time of setting, with setting order by wireless transmit mould
Block sends to background processor；Background processor receives data, to the office being made up of ultrasonic signal, the signal of telecommunication and infrared signal
Portion's electric discharge multimode signal processes, and Comprehensive Evaluation, the testing result of output shelf depreciation；When the closing time of switch exceedes
After the closing period preset, switch will reopen, and testing process returns to beginning state；Set switch Guan Bi continues
Time needs possible persistent period the longest more than shelf depreciation.
Described sound induction module, electric induction module, infrared induction module are used for gathering ultrasonic signal, the signal of telecommunication and red respectively
External signal.When magnetic induction module does not sends enabling signal, switch is in open mode, data that modules is gathered and right
Answer clock information to be only temporarily stored, background processor will not be transferred into.When magnetic induction module sends enabling signal, switch
After Guan Bi, the data that gathered and corresponding clock information are stored, under the control of data transmission control module, at once or periodically
Sent to background processor by wireless transmitter module.Background processor receives by ultrasonic signal, the signal of telecommunication and infrared signal institute
The shelf depreciation multimode signal of composition, carries out integrated treatment judge, output detections result, takes corresponding measure for technical staff.
The present invention compared with prior art, has the advantage that and beneficial effect:
1, the present invention utilizes magneto sensor induced field, as judging whether to occur the foundation of shelf depreciation.Magneto sensor is sensitive
Spend high, the flux density value of micro-special order of magnitude can be measured, and the measurement scope of existing coil-induced mode is that 0.1 milli spy is to 10
Special.Visible, magneto sensor is the sensitiveest.Additionally, magnetic field with distance decay relatively electric field faster, if the distance one away from interference source
Fixed, the interference suffered by magnetic field is less compared with electric field.To sum up, utilize magneto sensor induced field, thus judge whether to occur local to put
The method of electricity is the sensitiveest, reliable.
2, the present invention utilizes magnetic to trigger the transmission starting sampled data, when not there is shelf depreciation, does not transmit data.
Therefore, it can be greatly reduced the load being wirelessly transferred, it is ensured that critical data can reliably be transmitted to background processor.
3, due to the fact that transmission load is little, the most low in energy consumption, be conducive to power equipment carried out continuous detecting, thus and
The partial discharge phenomenon that Shi Faxian occurs at random.
4, after the shelf depreciation multimode signal being made up of ultrasonic signal, the signal of telecommunication and infrared signal is sent to by the present invention
Platform processor carries out integrated treatment, and the interference source suffered by distinct methods is different, and several method comprehensively can carry out complementation,
Improve the accuracy of detection.
5, the front-end acquisition device of the present invention is only responsible for data acquisition and transmission, does not processes, and therefore device volume is relatively
Little, power consumption is relatively low, can be with flexible distributed in each control point of power equipment.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of a kind of magnetic starting shelf depreciation wireless detection device of the present invention；
Fig. 2 is the front-end acquisition device position with power equipment of magnetic starting shelf depreciation wireless detecting system of the present invention
Relation schematic diagram；
Fig. 3 is the front-end acquisition device structural representation of magnetic starting shelf depreciation wireless detecting system of the present invention；
Fig. 4 is the workflow diagram of a kind of magnetic starting shelf depreciation method for wirelessly testing of the present invention.
Detailed description of the invention
Below in conjunction with the present invention is described in further detail the explanation of embodiment and accompanying drawing, but embodiments of the present invention
It is not limited to this.If it is noted that the following process having not detailed description especially or parameter, being all that those skilled in the art can join
Realize according to prior art.
Such as Fig. 1, a kind of magnetic starting shelf depreciation wireless detection device, fill including background processor and some front-end collections
Put.Front-end acquisition device can transmit data by wireless network to background processor.
Such as Fig. 2, front-end acquisition device can flexible distributed in multiple control points of power equipment, in order to reduce interference, it is ensured that
The accuracy of detection, front-end acquisition device should press close to the surface of power equipment as far as possible, and each control point keeps certain distance,
To guarantee that the front-end acquisition device of unrelated control point will not be interfered by produced magnetic field when there is shelf depreciation, produce
Raw erroneous judgement.
Such as Fig. 3, front-end acquisition device includes four kinds of induction modules: magnetic induction module, sound induction module, electric induction module,
Infrared induction module, a clock, three temporary storage cells, three switches, three valid data memory element, data
Transmission control module and a wireless transmitter module.Magnetic induction module is mainly made up of magneto sensor, for induced field.Magnetic strength
Answer the output of module for controlling opening or closing of switch.Clock provides current time information.Sound induction module, electric induction mould
Block and infrared induction module gather ultrasonic signal, the signal of telecommunication and infrared signal respectively, and each module connects one and deposits temporarily
Storage unit, the data gathered and corresponding clock information (i.e. the time of data acquisition) are stored into temporary storage cell.Deposit temporarily
The memory capacity of storage unit can set on demand, to preserve the data in a period of time.When reaching depositing of temporary storage cell
During storage capacity, by storage time order and function, new data being covered legacy data, data are first capped the most earlier, after newer data
Capped.Each temporary storage cell and a switch module are connected.When the switch is opened, the data of temporary storage cell can not
Enter valid data memory element；When the switch is closed, the data of temporary storage cell enter valid data memory element.Effectively
The capacity of data storage cell relatively temporary storage cell is bigger, it is possible to preserve repeatedly the partial data of shelf depreciation.Valid data
Memory element is connected with data transmission control module, and data transmission control module controls the transmission time of data, transmission order etc..
Data transmission control module is connected with wireless transmitter module, and data are sent to background processor by wireless transmitter module.
Magnetic induction module is mainly made up of magneto sensor.According to Theory of Electromagnetic Field, the electric field of change can produce magnetic field, table
The Maxwell equation stating this rule is as follows:
Wherein,HFor magnetic field intensity,DFor dielectric displacement,For through closed circuit footpathLThe free electric current of the curved surface surrounded.Thus
Visible, magnetic field intensity is directly proportional to the derivative of electric field.When a partial discharge occurs, pulse current can be produced, cause stronger magnetic
?.We utilize magneto sensor induced field, when magnetic field intensity exceedes default threshold value, it is determined that shelf depreciation occurs, and
Send enabling signal, it is allowed to the data that sound induction module, electric induction module, infrared induction module are gathered are sent to backstage.
Such as Fig. 4, a kind of magnetic starting shelf depreciation method for wirelessly testing, comprise following handling process: after system starts,
Magnetic induction module, sound induction module, electric induction module, infrared induction module start simultaneously at sensing.Magnetic induction module is according to being felt
Answer the intensity in magnetic field, decide whether to send enabling signal.When magnetic field intensity is more than or equal to predetermined threshold valueBTTime, send startup
Signal；When less than threshold valueBTTime, do not send enabling signal.Sound induction module, electric induction module, infrared induction module are respectively
Gathering ultrasonic signal, the signal of telecommunication and infrared signal, the data gathered are preserved to corresponding respectively with corresponding clock information
Temporary storage cell.Switch module open or close by enabling signal control, when enabling signal being detected, switch Guan Bi,
The data of temporary storage cell, respectively by respective switch module, enter into corresponding valid data memory element, wait quilt
Send to background processor；If the enabling signal of being not detected by, switch remains on, and the data of temporary storage cell can not pass
Deliver to valid data memory element, and after a certain time, covered by new data.The data of valid data memory element are in data
Under the control of transmission control module, according to parameter set in advance, in the stipulated time, pass through wireless transmitter module with a definite sequence
Send to background processor.Background processor receives data, to the local being made up of ultrasonic signal, the signal of telecommunication and infrared signal
Electric discharge multimode signal processes, and Comprehensive Evaluation, the testing result of output shelf depreciation.When the closing time of switch exceedes pre-
If closing period after, switch will reopen, system returns to beginning state.Set switch closing period needs
It is greater than the shelf depreciation the longest possible persistent period.
The method utilizes pulse current during shelf depreciation can cause electric field change, and the electric field changed produces the former of magnetic field
Reason, by magneto sensor induced field, thus determines whether shelf depreciation occur.When shelf depreciation does not occurs, gathered
Data are only temporarily stored, and will not be transferred into background processor；When there is shelf depreciation, the data gathered are stored
After, at once or periodically sent to backstage as required and carried out integrated treatment.The present invention gathers ultrasonic signal, the signal of telecommunication, infrared
The shelf depreciation multimode signal of signal composition, is analyzed processing, and the interference source suffered by distinct methods is different, by several sides
Method combines, and can carry out complementation, improves accuracy of detection.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-described embodiment
Limit, the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify,
All should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (6)
1. a magnetic starting shelf depreciation wireless detection device, it is characterised in that: include background processor and multiple front-end collection
Device, front-end acquisition device can acquisition monitoring point ultrasonic signal, the signal of telecommunication and infrared signal and by wireless network backward
Platform processor transmits data；Described front-end acquisition device includes magnetic induction module, sound induction module, electric induction module, infrared sense
Answer module, clock, switch, memory element, data transmission control module, wireless transmitter module；Front-end acquisition device is distributed in electricity
Multiple control points of power equipment, and press close to power equipment, and keep setpoint distance between each control point, to guarantee in generation office
During portion's electric discharge, the front-end acquisition device of unrelated control point will not be interfered by produced magnetic field, produces erroneous judgement；Front-end collection
Device can ultrasonic signal, the signal of telecommunication and the infrared signal of acquisition monitoring point；Described background processor is according to collected multiple
Partial Discharge Data, judges degree, the position of Electric Power Equipment Insulation deterioration；The control of described data transmission control module has
In effect data storage cell, data send the transmission time to backstage and transmission order；Data are passed through wireless by wireless transmitter module
Transmission, is sent to background processor.
A kind of magnetic starting shelf depreciation wireless detection device the most according to claim 1, it is characterised in that described magnetic induction
Module is made up of magneto sensor, for induced field；According to the intensity of institute's induced field, decide whether to send enabling signal, when
When magnetic field intensity exceedes default threshold value, it is determined that shelf depreciation occurs, and sends enabling signal.
A kind of magnetic starting shelf depreciation wireless detection device the most according to claim 1, it is characterised in that described storage list
Unit is divided into temporary storage cell and valid data memory element, and temporary storage cell can preserve gathered data temporarily, when reaching
During to the memory capacity of temporary storage cell, by storage time order and function, new data is covered legacy data；Valid data memory element
Memory capacity is bigger than temporary storage cell, can store repeatedly the partial data of shelf depreciation, and data will be transferred into backstage
Processor.
A kind of magnetic starting shelf depreciation wireless detection device the most according to claim 1, it is characterised in that described switch by
The enabling signal that magnetic induction module sends controls, when enabling signal being detected, and switch Guan Bi so that the number of temporary storage cell
According to entering valid data memory element；When being not detected by enabling signal, switch remains on, the number of temporary storage cell
According to not entering valid data memory element.
A kind of magnetic starting shelf depreciation wireless detection device the most according to claim 1, it is characterised in that described phonoreception should
Module, electric induction module and infrared induction module, gather ultrasonic signal, the signal of telecommunication and infrared signal respectively, the data gathered
And correspondence clock information is stored to corresponding temporary storage cell.
6. utilizing the detection method of magnetic starting shelf depreciation wireless detection device described in any one of claim 1 ~ 5, its feature exists
In including: after device is started working, magnetic induction module, sound induction module, electric induction module, infrared induction module start simultaneously at sense
Should；Magnetic induction module, according to the intensity of institute's induced field, decides whether to send enabling signal；When magnetic field intensity is more than or equal to presetting
Threshold valueBTTime, send enabling signal；When less than threshold valueBTTime, do not send enabling signal；Sound induction module, electric induction mould
Block, infrared induction module gather ultrasonic signal, the signal of telecommunication and infrared signal respectively, the data gathered and corresponding clock information
Preserved respectively to corresponding temporary storage cell；Opening or close by enabling signal control of switch module, opens when detecting
During dynamic signal, switch Guan Bi, the data of temporary storage cell by respective switch module, enter into corresponding significant figure respectively
According to memory element, wait and be sent to background processor；If the enabling signal of being not detected by, switch remains on, and deposits temporarily
The data of storage unit can not be sent to valid data memory element, and after the setting time, is covered by new data；Valid data are deposited
The data of storage unit are under the control of data transmission control module, according to parameter set in advance, in the time of setting, suitable to set
Sequence is sent to background processor by wireless transmitter module；Background processor receives data, to by ultrasonic signal, the signal of telecommunication and red
The shelf depreciation multimode signal that external signal is formed processes, and Comprehensive Evaluation, the testing result of output shelf depreciation；When opening
After the closing time closed exceedes default closing period, switch will reopen, and testing process returns to beginning state；Set
Fixed switch closing period needs possible persistent period the longest more than shelf depreciation.
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| CN111175614A (en) * | 2019-11-06 | 2020-05-19 | 河南平高电气股份有限公司 | Partial discharge acquisition and positioning method, device and system |
| CN112285494A (en) * | 2020-09-16 | 2021-01-29 | 北京博研中能科技有限公司 | Power cable partial discharge mode recognition analysis system |
| CN112563962A (en) * | 2020-11-17 | 2021-03-26 | 国网山东省电力公司济南供电公司 | Unmanned aerial vehicle intelligence system of patrolling and examining in cable tunnel |
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| CN106154125B (en) | 2019-04-09 |
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