CN105259461B - Electric railroad high-tension insulator working condition method for early warning and system - Google Patents
Electric railroad high-tension insulator working condition method for early warning and system Download PDFInfo
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- CN105259461B CN105259461B CN201510729507.5A CN201510729507A CN105259461B CN 105259461 B CN105259461 B CN 105259461B CN 201510729507 A CN201510729507 A CN 201510729507A CN 105259461 B CN105259461 B CN 105259461B
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Abstract
The present invention provides a kind of electric railroad high-tension insulator working condition method for early warning and system, and insulator Leakage Current is sampled, obtains the sampled data of insulator Leakage Current；The frequency spectrum of the low-frequency pulse of insulator Leakage Current and the yardstick crossing rate of high-frequency impulse are obtained according to sampled data；According to the pulse mode of frequency spectrum and yardstick crossing rate reduction Leakage Current；The working condition according to corresponding to pulse mode judges insulator.Because insulator is within the whole work period, the form of Leakage Current is that have certain rule governed, this method and system just judge the working condition of insulator from the characteristics of Leakage Current spectrum morphology, no longer it is to be judged in the prior art by setting a threshold value of insulator leakage current size, so that this method and system can be suitably used for each different environment, and it is accurate easy to use.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of electric railroad high-tension insulator working condition method for early warning
And system.
Background technology
A large amount of in the supply line of electric railway to use high-tension insulator, the quality of high-tension insulator working condition is directly
It is related to the safety problem of railway operation.The working condition of high-tension insulator typically has four-stage：First, insulator surface product
In the dirty stage, for the stage insulator leakage current based on power frequency, amplitude is less than below 1mA, for there is the insulator of damage, such as：
Zero resistance insulator and crannied insulator, high-frequency corona pulse appearance is had at this stage；Second, insulator surface moistening rank
Section, insulator surface contamination layer absorbs moisture in the stage, and insulaion resistance is reduced, and leakage current increases rapidly, insulator operation
State degenerates；3rd, insulator surface produces the shelf depreciation stage, and in wet environment, insulator surface contamination layer makes moist, and lets out
Leakage current continues to increase, and carries out drying to contamination layer and form dry zone, causes insulator to bear redistributing for voltage, dries
Band bears very high voltage, forms glow discharge；4th, in the flashover stage, the dry zone of insulator surface expands in the stage, local
Electric arc elongates, and pollution layer resistance reduces, and leakage current increase, local arc pressure drop constantly reduces, develops into flashover, cause when serious
Major accident.
At present, domestic and international dynamic monitoring insulator work state is entered using the method for monitoring insulator leakage current mostly
OK.For example, the maximum impulse amplitude by gathering insulator leakage current under working voltage, to judge the work shape of insulator
State.But because insulator leakage current is from small to large until developing into flashover, there is a process, influence in this process
The size of Leakage Current is except insulator this four big factor of quality, voltage class, weather conditions and insulator contamination degree in itself
Outside, there are other many enchancement factors, it is difficult to be predicted with unified a standard or threshold value.For example, for moister
Pearl River Delta area, under general case, leakage current is less than 650uA, and insulator surface climbs electricity without any；Leakage current is more than
During 1mA, the obvious arcing of insulator surface；String arc interruption maintains when leakage current is more than 2mA, but this this data is for dryly
Area is but extremely inaccurate.In summary, using the size of monitoring insulator leakage current unified threshold values can not be used to judge insulation
Sub- working condition, safe early warning can not be carried out to the running status of high-tension insulator well.
The content of the invention
Therefore, the technical problem to be solved in the present invention is to overcome the big of monitoring insulator leakage current of the prior art
Small the defects of safe early warning can not being carried out to the running status of high-tension insulator well, so as to provide a kind of electric railroad high pressure
Insulator work status early warning method and system.
Therefore, technical scheme is as follows：
A kind of electric railroad high-tension insulator working condition method for early warning, comprises the following steps：
Insulator Leakage Current is sampled, obtains the sampled data of insulator Leakage Current；
The frequency spectrum of the low-frequency pulse of the insulator Leakage Current is obtained according to the sampled data；
The yardstick crossing rate of the high-frequency impulse of the insulator Leakage Current is obtained according to the sampled data；
The pulse mode of the Leakage Current is reduced according to the frequency spectrum and the yardstick crossing rate；
The working condition according to corresponding to the pulse mode judges insulator.
Preferably, it is described to be specifically included according to corresponding to the pulse mode judges insulator the step of working condition：
When power frequency Leakage Current of the pulse mode for sine, judge whether occur during power frequency Leakage Current maximum
Spike, it is that then working condition corresponding to the insulator is that insulator surface moistens the stage, otherwise the insulator is corresponding
Working condition be safety operation area；
When the pulse mode is triangular wave, then working condition corresponding to the insulator is insulator surface generation office
Portion's discharge regime；
When the pulse mode is that random nothing zero is stopped, then working condition corresponding to the insulator is the flashover stage.
Preferably described method, in addition to：More same insulator is in the pulse mode at different moments, acquisition
The change of the pulse mode of the insulator, predict the speed that the insulator degenerates.
Preferably described method, in addition to：To different insulative of identical regional same batch synchronization institute
State pulse mode to be compared, to search defective insulator.
Preferably, when multiple insulators connect common ground by a ground wire, then obtain in the following way each
The sampled data of the Leakage Current of insulator：
Leakage Current is sampled in the ground terminal of entering of each insulator；
The sampled data is subtracted each other two-by-two, obtains the sampled data of the Leakage Current of each insulator.
Preferably described method, in addition to gather the maximum amplitude of insulator Leakage Current and judge the maximum amplitude
Whether predetermined threshold value is exceeded, if then starting to sample insulator Leakage Current.
A kind of electric railroad high-tension insulator working condition early warning system, including：
Acquisition component, it is connected with insulator, for being sampled to insulator Leakage Current, obtains insulator Leakage Current
Sampled data；
Collection terminal data processor, for obtaining the low frequency arteries and veins of the insulator Leakage Current according to the sampled data
The frequency spectrum of punching, and obtain according to the sampled data yardstick crossing rate of the high-frequency impulse of the insulator Leakage Current；
Transmission part, for sending the frequency spectrum and the yardstick crossing rate to server (4)；
Server, for reducing the pulse of the Leakage Current with the yardstick crossing rate according to the frequency spectrum received
Form；And for the working condition according to corresponding to the pulse mode judges insulator.
Preferably, the process of server working condition according to corresponding to the pulse mode judges insulator is specifically wrapped
Include：
When power frequency Leakage Current of the pulse mode for sine, judge whether occur during power frequency Leakage Current maximum
Spike, it is that then working condition corresponding to the insulator is that insulator surface moistens the stage, otherwise the insulator is corresponding
Working condition be safety operation area；
When the pulse mode is triangular wave, then working condition corresponding to the insulator is insulator surface generation office
Portion's discharge regime；
When the pulse mode is that random nothing zero is stopped, then working condition corresponding to the insulator is the flashover stage.
Preferably, the server is additionally operable to more same insulator in the pulse mode at different moments, acquisition
The change of the pulse mode of the insulator, predict the speed that the insulator degenerates；
It is additionally operable to be compared different insulative of identical regional same batch in the pulse mode of synchronization,
To search defective insulator.
Preferably, when multiple insulators connect common ground by a ground wire, then obtain in the following way each
The sampled data of the Leakage Current of insulator：
Leakage Current is sampled in the acquisition component of entering in ground terminal to install of each insulator；
The collection terminal data processor subtracts each other the sampled data that each acquisition component collects two-by-two,
Obtain the sampled data of the Leakage Current of each insulator.
Technical solution of the present invention, have the following advantages that：
1. electric railroad high-tension insulator working condition method for early warning provided by the invention and system, are revealed by insulator
The pulse mode of the yardstick crossing rate reduction Leakage Current of frequency spectrum and high-frequency impulse in the low-frequency pulse of electric current, and according to pulse
Form judges working condition corresponding to insulator.Because insulator is within the whole work period, the form of Leakage Current is that have one
Fixed rule is governed, and this method and system just judge the working condition of insulator from the characteristics of Leakage Current spectrum morphology,
No longer it is to be judged in the prior art by setting a threshold value of insulator leakage current size so that this method and system energy
Suitable for each different environment, and it is accurate easy to use.
2. electric railroad high-tension insulator working condition method for early warning provided by the invention and system, by more same
Insulator obtains the change of the pulse mode of insulator, predicts the speed that the insulator degenerates in pulse mode at different moments.
If because insulator degenerates within the work period, it can show in the pulse mode of Leakage Current, if current time and upper
One moment ratio, pulse mode then illustrate degenerating rapidly to insulator, in the event of this feelings there occurs larger change
Condition, then need to when front insulator carries out early warning.
3. electric railroad high-tension insulator working condition method for early warning provided by the invention and system, by identical area
Different insulative of same batch is compared in the pulse mode of synchronization, to search defective insulator.Due to not
Area, batch and the moment all same of insulator together, then as the external environment that can be understood as different insulative is, according to
Unitary variant principle, if the pulse mode of some insulator is different from other insulators, then it can illustrate the insulator certainly
Body be probably it is defective, it is simple and easy so as to reach the purpose for searching defective insulator.
4. electric railroad high-tension insulator working condition method for early warning provided by the invention, in addition to collection insulator leakage
The maximum amplitude of electric current simultaneously judges whether maximum amplitude exceedes predetermined threshold value, if then starting to adopt insulator Leakage Current
Sample.Because insulator only when maximum amplitude exceedes certain threshold value, is only possible to that the problem of working condition starts to degenerate occurs, then such as
This is provided with beneficial to saving energy consumption, and alleviates data processing amount.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a specific example of electric railroad high-tension insulator working condition method for early warning in the embodiment of the present invention 1
Flow chart；
Fig. 2 is a specific example of electric railroad high-tension insulator working condition early warning system in the embodiment of the present invention 2
Theory diagram；
Fig. 3 is the original of power unit in electric railroad high-tension insulator working condition early warning system in the embodiment of the present invention 2
Manage block diagram；
Reference：1- acquisition components；2- collection terminal data processors；3- transmission parts；4- servers.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be with
It is the connection of two element internals, can is wireless connection or wired connection.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It is be combined with each other into conflict can.
Embodiment 1
As shown in figure 1, the present embodiment provides a kind of electric railroad high-tension insulator working condition method for early warning, including it is as follows
Step：
S1：Insulator Leakage Current is sampled, obtains the sampled data of insulator Leakage Current.For example, it can lead to
Overcurrent collection ring is sampled, and sampling can lock work with power frequency half cycle (10ms) for a work period with phase-locked loop operation
Frequency waveform.The maximum amplitude of collection insulator Leakage Current can also be included before step S1 and judge whether maximum amplitude surpasses
Predetermined threshold value is crossed, if the step of being just transferred to step S2 and S3, the step passes through voltage comparator of the prior art etc.
To realize, it is not described in detail herein；Because insulator is only when the maximum amplitude of Leakage Current exceedes certain threshold value, it is only possible to
The problem of generation working condition starts to degenerate, it is arranged such and is advantageous to save energy consumption, and alleviates data processing amount.
S2：The frequency spectrum of the low-frequency pulse of insulator Leakage Current is obtained according to sampled data, because sampled data is leakage
The time-domain information of electric current, frequency domain information can be obtained by FFT, that is, obtains frequency spectrum；Strange frequency multiplication can be included in the frequency spectrum
Virtual value, wherein, strange frequency multiplication refers to leakage power frequency, 3 frequencys multiplication, 5 frequencys multiplication, 7 frequencys multiplication, 9 frequencys multiplication.
S3：The yardstick crossing rate of the high-frequency impulse of insulator Leakage Current is obtained according to sampled data.In specifically used,
5 grades of statistics can be divided, it is cost-effective to high-frequency impulse statistical yardstick crossing rate, it is convenient and easy.
S4：According to the frequency spectrum obtained in step S2 and the pulse of the yardstick crossing rate reduction Leakage Current obtained in step S3
Form.As a kind of specific implementation, it can be realized by way of wavelet transformation, those skilled in the art be able to should manage
Solution, it is also possible using other modes, as long as the pulse mode for restoring Leakage Current can be realized.
S5：The working condition according to corresponding to pulse mode judges insulator.
Step S5 can specifically include：
When power frequency Leakage Current of the pulse mode for sine, judge whether spike occur during power frequency Leakage Current maximum
Pulse, it is that then working condition corresponding to insulator is that insulator surface moistens the stage, otherwise working condition corresponding to insulator is
Safety operation area；
When pulse mode is triangular wave, then working condition corresponding to insulator is that insulator surface produces shelf depreciation rank
Section；
When pulse mode is that random nothing zero is stopped, such as：Phenomena such as power frequency leakage high current, high-frequency impulse are stopped without zero,
Then working condition corresponding to insulator is the flashover stage.
Because insulator is within the whole work period, the form of Leakage Current is that have governed (such as step of certain rule
Shown in S5 specific implementation), the method that the present embodiment provides just judges insulation from the characteristics of Leakage Current spectrum morphology
The working condition of son, is no longer to be judged in the prior art by setting a threshold value of insulator leakage current size so that
This method can be suitably used for each different environment, and accurate easy to use.
On the basis of such scheme, in addition to：More same insulator is exhausted in pulse mode at different moments, acquisition
The change of the pulse mode of edge, the speed that the insulator degenerates is predicted, i.e.,：The pulse mode of same insulator is indulged
To comparing.If because insulator degenerates within the work period, it can show in the pulse mode of Leakage Current, if when current
Carve and last moment ratio, pulse mode then illustrate degenerating rapidly to insulator, in the event of this there occurs larger change
Kind situation, then need to when front insulator carries out early warning.
On the basis of such scheme, in addition to：To different insulative of identical regional same batch in synchronization
Pulse mode is compared, to search defective insulator, i.e.,：Lateral comparison is carried out to the pulse mode of multiple insulators.
Due to the area of different insulators, batch and moment all same, then the external environment that can be understood as different insulative is one
Sample, according to unitary variant principle, if the pulse mode of some insulator is different from other insulators, then it can illustrate that this is exhausted
Edge itself be probably it is defective, it is simple and easy so as to reach the purpose for searching defective insulator.Defective insulation
Son can include：Occur defect after defect or flashover occur when defect, operation in defect, the installation process of dispatching from the factory.
In actual use, in fact it could happen that multiple insulators are connected the situation of common ground by a ground wire, then can be with
The sampled data of the Leakage Current of each insulator is obtained in the following way：Enter ground terminal to Leakage Current in each insulator
Sampled；Sampled data is subtracted each other two-by-two, then can obtain the sampled data of the Leakage Current of each insulator.Such as：Pass through
The method that current spectrum subtracts each other, the sampled data of the Leakage Current of each insulator is separated.
Embodiment 2
As shown in Fig. 2 the present embodiment provides a kind of electric railroad high-tension insulator working condition early warning system, including：
Acquisition component 1, is connected with insulator, for being sampled to insulator Leakage Current, obtains insulator leakage electricity
The sampled data of stream.Specifically, the acquisition component 1 can be hung on the leakage line of each insulator string.It is of the prior art to adopt
Collection part is mostly sampled on leakage line by being through to realize to insulator leakage current, but in real life, is had
Many insulators are that now acquisition component of the prior art, which will not pass through, reveals line to realize to insulation close to electric pole
The purpose that sub- leakage current is sampled, the acquisition component referred in the present embodiment can be designed circlewise, be enclosed on electric pole
Reach the purpose sampled to insulator Leakage Current.In actual use, acquisition component 1 can be designed to only when exhausted
When the maximum amplitude of edge Leakage Current exceedes predetermined threshold value, just start to sample；Due to insulator only in Leakage Current most
When amplitude exceedes certain threshold value, it is only possible to that the problem of working condition starts to degenerate occurs, is arranged such and is advantageous to save energy consumption, and
Alleviate data processing amount.
Collection terminal data processor 2, the frequency of the low-frequency pulse for obtaining insulator Leakage Current according to sampled data
Spectrum and the yardstick crossing rate of high-frequency impulse.
Transmission part 3, for sending the frequency spectrum of insulator Leakage Current low-frequency pulse and the yardstick crossing rate of high-frequency impulse
To server 4.The transmission part 3 can be used and wirelessly propagated, and such as utilize the existing radio communications of GPRS, be saved
About cost；Transmission means can use the transmission means of relaying.In actual use, transmission condition can be set, only in frequency spectrum
When meeting certain preparatory condition with yardstick crossing rate, server 4 is just sent it to.
Server 4, for the pulse mode according to the frequency spectrum received and yardstick crossing rate reduction Leakage Current；And it is used for
The working condition according to corresponding to pulse mode judges insulator.
Wherein, the process of working condition according to corresponding to pulse mode judges insulator of server 4 specifically includes：Work as pulse
When form is sinusoidal power frequency Leakage Current, judges whether spike occur during power frequency Leakage Current maximum, be to insulate
Working condition corresponding to son is that insulator surface moistens the stage, and otherwise working condition corresponding to insulator is safety operation area；When
When pulse mode is triangular wave, then working condition corresponding to insulator is that insulator surface produces the shelf depreciation stage；Work as pulse
When form is that random nothing zero is stopped, then working condition corresponding to insulator is the flashover stage.
Pass through the frequency spectrum and high frequency in the low-frequency pulse that calculates insulator Leakage Current in collection terminal data processor 2
The yardstick crossing rate of pulse, and send it to server 4 and restore pulse mode, and insulator is judged according to pulse mode
Working condition.Which reduce the transmission quantity of quantity；Simultaneously as insulator is within the whole work period, the form of Leakage Current
It is to have that certain rule is governed, the system just judges the working condition of insulator from the characteristics of Leakage Current spectrum morphology,
No longer it is to be judged in the prior art by setting a threshold value of insulator leakage current size so that the system can be suitably used for
Each different environment, is easy to promote the use of.
On the basis of such scheme, server 4 can be also used for more same insulator in pulse at different moments
Form, the change of the pulse mode of insulator is obtained, predict the speed that the insulator degenerates；It can be also used for identical regional phase
Different insulative with batch is compared in the pulse mode of synchronization, to search defective insulator.
In real life, it is also possible to the situation that multiple insulators are connected common ground by a ground wire occur, then may be used
To obtain the sampled data of the Leakage Current of each insulator in the following way：Enter ground terminal installation collection in each insulator
Part 1 samples to Leakage Current, such as：Installed on leakage line；Collection terminal data processor 2 is by each acquisition component 1
Sample obtained sampled data two-by-two to subtract each other, then obtain the sampled data of the Leakage Current of each insulator.
As shown in figure 3, the power unit of the system can use solar film battery to power, super farad capacitor storage
Electricity, and after DC/DC change-over circuits, to acquisition component 1, collection terminal data processor 2, transmission part 3 is powered.In power supply
During failure, the voltage of such as super farad capacitor is less than 1V alarms.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (8)
1. a kind of electric railroad high-tension insulator working condition method for early warning, it is characterised in that comprise the following steps：
Insulator Leakage Current is sampled, obtains the sampled data of insulator Leakage Current；
The frequency spectrum of the low-frequency pulse of the insulator Leakage Current is obtained according to the sampled data；
The yardstick crossing rate of the high-frequency impulse of the insulator Leakage Current is obtained according to the sampled data；
The pulse mode of the Leakage Current is reduced according to the frequency spectrum and the yardstick crossing rate；
The working condition according to corresponding to the pulse mode judges insulator；
It is described to be specifically included according to corresponding to the pulse mode judges insulator the step of working condition：
When power frequency Leakage Current of the pulse mode for sine, judge whether spike occur during power frequency Leakage Current maximum
Pulse, it is that then working condition corresponding to the insulator is that insulator surface moistens stage, otherwise work corresponding to the insulator
It is safety operation area to make state；
When the pulse mode is triangular wave, then working condition corresponding to the insulator is that insulator surface produces local put
The electric stage；
When the pulse mode is that random nothing zero is stopped, then working condition corresponding to the insulator is the flashover stage.
2. according to the method for claim 1, it is characterised in that also include：More same insulator is at different moments
The pulse mode, the change of the pulse mode of the insulator is obtained, predict the speed that the insulator degenerates.
3. according to the method for claim 1, it is characterised in that also include：To the different insulative of identical regional same batch
Son is compared in the pulse mode of synchronization, to search defective insulator.
4. according to the method for claim 1, it is characterised in that when multiple insulators connect common ground by a ground wire
When, then the sampled data of the Leakage Current of each insulator is obtained in the following way：
Leakage Current is sampled in the ground terminal of entering of each insulator；
The sampled data is subtracted each other two-by-two, obtains the sampled data of the Leakage Current of each insulator.
5. according to any described methods of claim 1-4, it is characterised in that also include the maximum of collection insulator Leakage Current
Amplitude simultaneously judges whether the maximum amplitude exceedes predetermined threshold value, if then starting to sample insulator Leakage Current.
A kind of 6. electric railroad high-tension insulator working condition early warning system, it is characterised in that including：
Acquisition component (1), is connected with insulator, for being sampled to insulator Leakage Current, obtains insulator Leakage Current
Sampled data；
Collection terminal data processor (2), for obtaining the low frequency arteries and veins of the insulator Leakage Current according to the sampled data
The frequency spectrum of punching, and obtain according to the sampled data yardstick crossing rate of the high-frequency impulse of the insulator Leakage Current；
Transmission part (3), for sending the frequency spectrum and the yardstick crossing rate to server (4)；
Server (4), for reducing the pulse of the Leakage Current with the yardstick crossing rate according to the frequency spectrum received
Form；And for the working condition according to corresponding to the pulse mode judges insulator；
Server (4) process of working condition according to corresponding to the pulse mode judges insulator specifically includes：
When power frequency Leakage Current of the pulse mode for sine, judge whether spike occur during power frequency Leakage Current maximum
Pulse, it is that then working condition corresponding to the insulator is that insulator surface moistens stage, otherwise work corresponding to the insulator
It is safety operation area to make state；
When the pulse mode is triangular wave, then working condition corresponding to the insulator is that insulator surface produces local put
The electric stage；
When the pulse mode is that random nothing zero is stopped, then working condition corresponding to the insulator is the flashover stage.
7. system according to claim 6, it is characterised in that the server (4) is additionally operable to more same insulator
In the pulse mode at different moments, the change of the pulse mode of the insulator is obtained, predicts the speed that the insulator degenerates
Degree；
It is additionally operable to be compared different insulative of identical regional same batch in the pulse mode of synchronization, to look into
Look for defective insulator.
8. according to any described system of claim 6 to 7, it is characterised in that when multiple insulators are connected by a ground wire
During common ground, then the sampled data of the Leakage Current of each insulator is obtained in the following way：
Leakage Current is sampled in the acquisition component (1) of entering in ground terminal to install of each insulator；
The two-phase of the sampled data two that the collection terminal data processor (2) collects each acquisition component (1)
Subtract, obtain the sampled data of the Leakage Current of each insulator.
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