CN107632240A - Aerial cable current data analysis method, health status monitoring method and system - Google Patents
Aerial cable current data analysis method, health status monitoring method and system Download PDFInfo
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Abstract
The invention belongs to electric power monitoring technical field, propose a kind of aerial cable current data analysis method, including current signal pretreatment, signal make the difference analysis, extract difference extreme point, finally by difference extreme's distribution waveform compared with reference waveform, judge whether overhead transmission line cable health status normal.The invention also provides aerial cable health status monitoring method, including the analysis of current acquisition, GPS synchronous clock calibratings, base station data acquisition and recording, base station data, abnormal data gather, establish Mishap Database, management station's data analysis, fault alarm and GPS figure shows.Pass through above-mentioned technical proposal, solve the problems, such as that the research to overhead transmission line cable fault can not give warning in advance in the prior art, can not prevent accident generation.
Description
Technical field
The invention belongs to electric power monitoring technical field, is related to a kind of overhead transmission line cable current data analysing method, health
State monitoring method and device.
Background technology
Overhead transmission line typically selects the erecting cable of no protection overcoat out of doors, is in scorching summer and freezing winter, wind rain all the year round
In the various severe use environments such as leaching.Overhead transmission line sets up distance out of doors, general to set up apart from several kilometers to tens public affairs
In, the partial high pressure construction of line is apart from hundreds to thousands kilometer.It is qualified that cable is examined when production is dispatched from the factory, and is referred to as health；Electricity
The state of cable in use is referred to as the health status of cable.With the growth of usage time, cable starts aging, electricity occur
The various problems such as resistance increase, stranded, the referred to as health status of cable decline.It is a long-term accumulated that the health status of cable, which declines,
Process, be not easy to find in a short time.On the line, the security performance at overhead transmission line initial stage is can be with for the erecting cable of new production
It is guaranteed.With the growth of overhead transmission line usage time, because the health status of cable declines, overhead transmission line engenders
Various failures.
The research for being likely to occur various failures for overhead transmission line cable at present is concentrated mainly on because external force factor is made
Into various catastrophic failures, such as short trouble, open circuit fault etc., research regarding to the issue above mainly concentrates two aspects.
On the one hand it is the research and its application of the relay protection theory after failure occurs.CN105974232A discloses one
Kind step 1, obtains the switching value and electric quantity information in power network suitable for the electric network failure diagnosis method of grid；Step
Rapid two, fault coverage is determined by the switching value and electric quantity information that are obtained in step 1；Step 3, according to protection signal to failure
The incidence relation of equipment determines all faulty equipments in the fault coverage that is obtained by the step 2；Step 4, simplify high pressure
The protection model of power network, establish 71EC61850 high-voltage fence models；Step 5, according to the high-voltage fence mould established in step 4
Type determines object function, whether there is relay fail, the situation of switch failure in the faulty equipment obtained in detecting step three, obtains
Go out protection act information.Multi-source information based on relay protection model, wave-record chart, switch carries out fault diagnosis, greatly carries
The high accuracy of positioning.CN105203866A discloses one kind and is used for the cross interconnected cable on-line fault diagnosis of 110kVXLPE
New method, i.e. method of loci.This method is to gather cable metal sheath by on-line monitoring system to be grounded circulation and operation electricity
Parameter is pressed, is transmitting to computer, is building the trajectory diagram that two kinds of parametric synthesis are got up in the same period.Any failure is all right
Different trajectory diagrams is answered, using the digital image processing techniques com-parison and analysis trajectory diagram and difference condition under normal circumstances, is come
Accurately carry out fault diagnosis.
On the other hand it is the ranging technology of line fault point after failure occurs.CN205643604U discloses a kind of high pressure
Cable fault diagnostic device, including arithmetic processor, temperature sensor, optical fiber wave survey meter, pulsed signal device, optical fiber
Signal receiver transmitter, alarm portion and battery compartment, using the mutual cooperation of each element, accurately it can determine in cable
Point occurs for failure, not only can be with the position of the localization of faults, the concrete reason that can also be broken down.CN102928743A
A kind of technical scheme of electricity consumption circuitry fault detection method is provided, when the fault current for knowing somewhere, it is possible to quickly meter
The position of trouble point is calculated, in order to quickly search and exclude the trouble point of circuit, power transmission of the fast quick-recovery to the circuit that trips.
Although all these prior arts are deployed from electric network failure diagnosis method, trouble point detection etc. to transmission line of electricity
Research.But the emphasis of research is diagnosis accident occurrence type and measurement place where the accident occurred point, is lacked before accident occurs
Research.If by being monitored to the health status of overhead transmission line cable before accident generation, sent out in the health status of cable
During raw problem, find and take measures in time, can so avoid because accident caused by cable health status declines.
The content of the invention
The present invention proposes aerial cable current data analysis method, health status monitoring method and device, solves existing
Research in technology to overhead transmission line cable fault can not give warning in advance, can not prevent accident the problem of occurring.
The technical proposal of the invention is realized in this way：
Aerial cable current data analysis method, comprises the following steps,
Step 41：Current signal pre-processes, and the current signal of two positions removes power frequency 50Hz in a certain phase of aerial cable
The high-frequency current signal of two positions is obtained after signal, is denoted as f (K1), f (K2) respectively；
Step 42：Signal makes the difference analysis, and f (K1), f (K2) make the difference, if identical, monitoring circuit cable health status is just
Often, if it is not the same, carrying out wavelet analysis to f (K1)-f (K2)；
Step 43：Difference extreme point is extracted, the difference extreme point of wavelet analysis, is arranged according to the time in extraction step 42
Sequence, draw difference extreme's distribution waveform；
Step 44：Data analysis, for difference extreme's distribution waveform compared with reference waveform, judgement draws overhead transmission line cable
Whether health status is normal.
The present invention also proposes aerial cable health status monitoring method, comprises the following steps：
Step 1：Current acquisition, at least two corresponding numbering of current collector distribution and 71P addresses, are adopted on aerial cable
Collect its position current signal, be wirelessly transmitted to base station；
Step 2：GPS synchronous clock calibratings, the difference according to each current collector apart from base station location, consider that signal passes
The defeated time difference, carry out time calibration；
Step 3：Base station data acquisition and recording, base station receives the data after gps clock synchronous calibration, and is remembered
Record；
Step 4：Base station data is analyzed, the data that base station records according to step 3, at the beginning of carrying out overhead transmission line cable current data
Level analysis, is ignored for normal data, and management station is sent to using the mode being wirelessly transferred for the data of exception；
Step 5：Abnormal data gathers, and management station receives the abnormal data that base station is sent, and is recorded；
Step 6：Establish Mishap Database；
Step 7：Management station's data analysis, the data that management station records according to step 5 carry out current data secondary analysis, obtained
To difference extreme point, characteristic parameter, sequential and frequency, then using Fuzzy Pattern Recognition, by the knot of current data secondary analysis
Fruit is matched with the fault data in the Mishap Database, obtains the fault type of overhead transmission line cable.
As further technical scheme, also include after step 7,
Step 8：Fault alarm, it is judged as the event of overhead transmission line cable fault for management station, utilizes the side of acousto-optic-electric
Formula notifies operator on duty, and failure code is shown, there is provided to operator on duty；
Step 9：GPS figure shows, the position of failure overhead transmission line cable is shown on GPS figures, watch
Member is accurately judged to the position coordinates of failure overhead transmission line cable according to figure shows, targetedly takes measures.
As further technical scheme, step 6 specifically,
Step 61：Overhead transmission line cable carries out fault simulating test under various circumstances, records fault type and corresponding
Fault data；
Step 62：The failure that overhead transmission line cable occurs in practical service environment, record fault type and corresponding event
Hinder data；
Step 63：Fault type and fault data, which correspond, in step 61, step 62 is stored in Mishap Database, and
Corresponding failure code is distributed for fault type.
As further technical scheme, in step 7, current data secondary analysis comprise the following steps：
Step 71, signal makes the difference analysis, and carry out small echo is made the difference to the high-frequency current signal f (K1) and f (K2) of abnormal data
Analysis；
Step 72, difference extreme point, characteristic parameter, sequential and frequency in extraction step 71.
As further technical scheme, in step 7, Fuzzy Pattern Recognition comprises the following steps：
Step 73, the result of current data secondary analysis and the similarity of fault data in step 6, phase in calculation procedure 7
0~1 numerical value is designated as like degree；
Step 74, according to the numerical identification fault type and possibility of similarity.
As further technical scheme, according to the numerical value of similarity closer to 1, overhead transmission line cable is such failure
Possibility is bigger, and for similarity closer to 0, overhead transmission line cable is smaller for the possibility of such failure.
The present invention also proposes aerial cable health status monitoring system, including
At least two are arranged on the current collector on overhead transmission line cable, and the current collector is including controller and
The Rogowski coil and GPS synchronised clocks being connected with controller,
Controller and base station data acquisition system, base station data analysis system, abnormal data acquisition system, Mishap Database
It is sequentially connected with management station data analysis system,
The Rogowski coil both ends docking is set on overhead transmission line cable, and the Rogowski coil is adopted
Sample frequency is 1MHz, and controller, which will collect current signal data by way of being wirelessly transferred and send the base station data to, to be adopted
Collecting system,
The GPS synchronised clocks are synchronous with satellite GPS synchronised clocks, and for according to each Rogowski coil away from
The time difference of difference, consideration signal transmission from base station location, the GPS synchronised clocks for carrying out time calibration.
As further technical scheme, include the fault alarm dress of described management station's data analysis system connection
Put, accident warning device is connected with GPS graphic display systems, and the GPS graphic display systems include being arranged on overhead transmission line electricity
Several GPS positioning devices on cable.
Use principle of the present invention and have the beneficial effect that：
Beneficial effects of the present invention are：
1st, current data primary is analyzed tentatively is judged for the health status to overhead transmission line cable, for tentatively sentencing
Break and ignored for normal current data, continue the current data collection of a new round, it is abnormal for being tentatively judged as
Current data, then carry out follow-up complicated judgement.By making the difference analysis to high-frequency signal, the distribution ripple of difference extreme point is obtained
Shape, difference extreme's distribution waveform is compared with reference waveform, data judging of the error amount within reference waveform ± 10%
It is otherwise abnormal data for normal data, this method calculating process is simple, determination methods are direct, is normal for judged result
Current signal need not carry out follow-up complex calculation, save resource, improve monitoring velocity.
2nd, current data analysis method uses the analysis method of wavelet theory, more by progressively being carried out to high-frequency current signal
Yardstick refines, and is finally reached high frequency treatment time subdivision, so as to focus on any details of signal, is advantageous to make and accurately sentences
It is disconnected, reduce the generation of erroneous judgement.
3rd, overhead transmission line cable can still continue charging operation when locally breaking down, but ND peace be present
Full hidden danger, the present invention are sent out by being monitored to the health status of overhead transmission line cable in the health status of overhead transmission line cable
During raw problem, find in time and notify operator on duty to take measures using the mode of acousto-optic-electric, by hidden danger before accident generation
Exclude, effectively avoid the generation of overhead transmission line cable fault.
4th, a Mishap Database part is to carry out fault simulation examination under various circumstances for the type overhead transmission line cable
Test to obtain fault data, be then recorded in Mishap Database, another part is in actual use ring according to overhead transmission line cable
The data collected when being broken down in border, are then recorded in Mishap Database, and failure is accumulated according to the experience of staff
Progression row, accumulation is continuously replenished in actual applications, ensures the whole fault type of Mishap Database covering, it is accurate to carry out
Breakdown judge；Corresponding failure code is distributed for fault type, makes the display of fault message simple and clear.
5th, Fuzzy Pattern Recognition is by introducing fuzzy mathematics method, by the result and fault data of current data secondary analysis
Fault type in storehouse is matched, and overhead transmission line cable health status identifying system is designed with fuzzy technology, simple in construction,
More extensively, deeper into the thought process of simulation human brain, so as to carry out more efficiently point to overhead transmission line cable health status
Class and identification.
6th, Rogowski coil is the hollow flexible coil of open loop, and both ends docking is enclosed on overhead transmission line cable, not shadow
Ring the normal work of overhead transmission line cable；Rogowski coil is compared with transformer, in the absence of magnetically saturated problem, Luo Kefu
This lubber ring can also measure the high-frequency signal of overhead transmission line cable.
GPS synchronised clocks are synchronous with satellite GPS synchronised clocks, according to each Rogowski coil apart from base station location
Difference, consider the time difference of signal transmission, carry out time calibration, avoid causing to judge by accident because the clock of data transfer is asynchronous.
7th, GPS graphic display systems can show that the particular location and fault type of failure aerial cable, operator on duty
The position coordinates and phase sequence attribute of failure cable can be accurately judged to according to figure shows, is targetedly taken measures.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is aerial cable current data primary analysis process schematic diagram in the present invention；
Fig. 2 is aerial cable health status monitoring method flow schematic diagram in the present invention；
Fig. 3 is management station's data analysis schematic flow sheet in the present invention；
Fig. 4 is aerial cable health status monitoring system wire schematic diagram in the present invention；
Fig. 5 is aerial cable health status monitoring system distribution schematic diagram in the present invention；
Fig. 6 is fault tree schematic diagram in the present invention；
In figure：1- Rogowski coils, 2-GPS synchronised clocks, 3- base station data acquisition systems, the analysis of 4- base station datas
System, 5- abnormal data acquisition systems, 6- Mishap Databases, 7- management stations data analysis system, 8- accident warning devices, 9-
GPS graphic display systems, 10- fixing points, 11- overhead line support towers, 12- base stations, 13- management stations.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment 1
As shown in figs. 1 to 6, aerial cable current data analysis method proposed by the present invention, comprises the following steps,
Step 41：Current signal pre-processes, and the current signal of two positions removes power frequency 50Hz in a certain phase of aerial cable
The high-frequency current signal of two positions is obtained after signal, is denoted as f (K1), f (K2) respectively；
Step 42：Signal makes the difference analysis, and f (K1), f (K2) make the difference, if identical, monitoring circuit cable health status is just
Often, if it is not the same, carrying out wavelet analysis to f (K1)-f (K2)；
Step 43：Difference extreme point is extracted, the difference extreme point of wavelet analysis, is arranged according to the time in extraction step 42
Sequence, draw difference extreme's distribution waveform；
Step 44：Data analysis, for difference extreme's distribution waveform compared with reference waveform, judgement draws overhead transmission line cable
Whether health status is normal.
Current data primary is analyzed tentatively to be judged for the health status to overhead transmission line cable, is judged for preliminary
Ignored for normal current data, continue the current data collection of a new round, for being tentatively judged as abnormal electricity
Flow data, then carry out follow-up complicated judgement.By making the difference analysis to high-frequency signal, the distribution waveform of difference extreme point is obtained,
Difference extreme's distribution waveform is compared with reference waveform, and data judging of the error amount within reference waveform ± 10% is just
Regular data, it is otherwise abnormal data, this method calculating process is simple, determination methods are direct, is normal electricity for judged result
Stream signal need not carry out follow-up complex calculation, save resource, improve monitoring velocity.
Current data analysis method uses the analysis method of wavelet theory, by progressively carrying out more chis to high-frequency current signal
Degree refinement, is finally reached high frequency treatment time subdivision, so as to focus on any details of signal, is advantageous to make and accurately sentences
It is disconnected, reduce the generation of erroneous judgement.
The present invention also proposes aerial cable health status monitoring method, comprises the following steps：
Step 1：Current acquisition, at least two corresponding numbering of current collector distribution and 71P addresses, are adopted on aerial cable
Collect its position current signal, be wirelessly transmitted to base station 12；
Step 2：GPS synchronous clock calibratings, the difference according to each current collector apart from the position of base station 12, consider signal
Transmission time difference, carry out time calibration；
Step 3：Base station data acquisition and recording, base station 12 receives the data after gps clock synchronous calibration, and is remembered
Record；
Step 4：Base station data is analyzed, the data that base station 12 records according to step 3, carries out overhead transmission line cable current data
Primary analysis, is ignored for normal data, and management station is sent to using the mode being wirelessly transferred for the data of exception
13；
Step 5：Abnormal data gathers, and management station 13 receives the abnormal data that base station 12 is sent, and is recorded；
Step 6：Establish Mishap Database 6；
Step 7：Management station's data analysis, the data that management station 13 records according to step 5 carry out current data secondary analysis,
Difference extreme point, characteristic parameter, sequential and frequency are obtained, then using Fuzzy Pattern Recognition, by current data secondary analysis
As a result matched with the fault data in the Mishap Database 6, obtain the fault type of overhead transmission line cable.
Overhead transmission line cable can still continue charging operation when locally breaking down, but ND safety be present
Hidden danger, the present invention are occurred by being monitored to the health status of overhead transmission line cable in the health status of overhead transmission line cable
During problem, find and take measures in time, by removing the hidden trouble before accident generation, effectively avoid overhead transmission line cable fault
Occur.
Further, step 6 specifically,
Step 61：Overhead transmission line cable carries out fault simulating test under various circumstances, records fault type and corresponding
Fault data；
Step 62：The failure that overhead transmission line cable occurs in practical service environment, record fault type and corresponding event
Hinder data；
Step 63：Fault type and fault data, which correspond, in step 61, step 62 is stored in Mishap Database 6,
And distribute corresponding failure code for fault type.
The part of Mishap Database 6 is to carry out fault simulating test under various circumstances for the type overhead transmission line cable
Fault data is obtained, is then recorded in Mishap Database 6, another part is in practical service environment according to overhead transmission line cable
In the data that collect when breaking down, be then recorded in Mishap Database 6, failure is the experience accumulation according to staff
Carry out, accumulation is continuously replenished in actual applications, ensure that Mishap Database 6 covers whole fault types, it is accurate to carry out
Breakdown judge；Corresponding failure code is distributed for fault type, makes the display of fault message simple and clear.
Further, in step 7, current data secondary analysis comprise the following steps：
Step 71, signal makes the difference analysis, and carry out small echo is made the difference to the high-frequency current signal f (K1) and f (K2) of abnormal data
Analysis；
Step 72, difference extreme point, characteristic parameter, sequential and frequency in extraction step 71.
Further, in step 7, Fuzzy Pattern Recognition comprises the following steps：
Step 73, the result of current data secondary analysis and the similarity of fault data in step 6, phase in calculation procedure 7
0~1 numerical value is designated as like degree；
Step 74, according to the numerical identification fault type and possibility of similarity.
Fuzzy Pattern Recognition is by introducing fuzzy mathematics method, by the result and Mishap Database of current data secondary analysis
Fault type in 6 is matched, and overhead transmission line cable health status identifying system is designed with fuzzy technology, simple in construction,
More extensively, deeper into the thought process of simulation human brain, so as to carry out more efficiently point to overhead transmission line cable health status
Class and identification.
Further, according to the numerical value of similarity closer to 1, overhead transmission line cable is bigger for the possibility of such failure, phase
Like degree closer to 0, overhead transmission line cable is smaller for the possibility of such failure.
The present invention also proposes aerial cable health status monitoring system, including
At least two are arranged on the current collector on overhead transmission line cable, and the current collector is including controller and
The Rogowski coil 1 and GPS synchronised clocks 2 being connected with controller,
Controller and base station data acquisition system 3, base station data analysis system 4, abnormal data acquisition system 5, number of faults
It is sequentially connected according to storehouse 6 and management station's data analysis system 7,
The both ends of Rogowski coil 1 docking is set on overhead transmission line cable, the Rogowski coil 1
Sample frequency is 1MHz, and controller will collect current signal data by way of being wirelessly transferred and send the base station data to
Acquisition system 3,
The GPS synchronised clocks 2 are synchronous with satellite GPS synchronised clocks, and for according to each Rogowski coil 1
The time difference of difference, consideration signal transmission apart from the position of base station 12, the GPS synchronised clocks for carrying out time calibration.
Rogowski coil 1 is the hollow flexible coil of open loop, and both ends docking is enclosed on overhead transmission line cable, do not influenceed
The normal work of overhead transmission line cable；Rogowski coil 1 is compared with transformer, in the absence of magnetically saturated problem, Luo Kefu
This lubber ring 1 can also measure the high-frequency signal of overhead transmission line cable.
GPS synchronised clocks 2 are synchronous with satellite GPS synchronised clocks 2, according to each Rogowski coil 1 apart from base station 12
The difference of position, consider the time difference of signal transmission, carry out time calibration, avoid causing because the clock of data transfer is asynchronous
Erroneous judgement.
Further：Also include the accident warning device 8 that described management station's data analysis system 7 connects, fault alarm dress
Put 8 and be connected with GPS graphic display systems 9, the GPS graphic display systems 9 include some on overhead transmission line cable
Individual GPS positioning device.
GPS graphic display systems 9 can show that the particular location and fault type of failure aerial cable, and operator on duty can
To be accurately judged to the position coordinates of failure cable and phase sequence attribute according to figure shows, targetedly take measures.
By taking a certain section of overhead transmission line as an example, the initiating terminal of the A phases of the overhead transmission line cable and end are separately fixed at aerial
On the fixing point 10 of line cord, Rogowski coil 1 is covered respectively in the initiating terminal of A phases and end, according to Luo Kefusi
The position of lubber ring 1 is different, respectively numbering K1 and K2；The high-frequency current signal that K1 and K2 are collected is denoted as function f (K1) respectively
With function f (K2), base station data acquisition system 3 is then transmitted in a manner of being wirelessly transferred as data；Base station data gathers
The calibration of the process GPS of system 3 synchronised clocks 2, receiver function f (K1) and function f (K2) data are simultaneously recorded；Base station 12 counts
Data analysis is carried out using Wavelet Analysis Theory according to the data that analysis system 4 records to base station data acquisition system 3, is briefly described
For：Carry out wavelet analysis, i.e. function f (f (K1)-f (K2)) wavelet analysis are made the difference to above-mentioned two function f (K1) and f (K2)；Frame
Empty line cord is produced using strands mode, when wherein one is broken, the high-frequency signal of cable initiating terminal collection
Function f (K1) and the electric current high-frequency signal function f (K2) of end collection will be different, now function f (f (K1)-f (K2)) small echo
The health status of analysis result preliminary judgement cable changes；Because cable leaves enough allowances in design, wherein one
Stock occurs not interfering with normal electrical energy transportation during breakage problem, but breaking part occurs that temperature rise, resistance increase etc. are asked
Topic, and then this section of cable potential safety hazard is present；The data analysis system 4 of base station 12 for analysis result for abnormal data without
Line is transferred to electric network data acquisition system 5；Electric network data acquisition system 5 receives the data of the data analysis system 4 of base station 12 transmission,
And recorded；The data that electric network data analysis system 6 records to electric network data acquisition system 5 further carry out data analysis,
And the fault type with being recorded in Mishap Database 7 carries out Fuzzy Pattern Recognition, determines fault type and failure code；Failure
Warning device 8 notifies operator on duty according to above-mentioned result of determination using the mode of acousto-optic-electric, and failure code is shown,
It is supplied to operator on duty；GPS graphic display systems 9 can show the position of failure cable specifically out on GPS figures, be worth
Class personnel can be accurately judged to the position coordinates of failure cable according to figure shows, targetedly take measures.
More specific description is：Rogowski coil 1 is enclosed on the electric current height that cable is flowed through in collection on overhead transmission line cable
Frequency signal is wirelessly transmitted to the data collecting system 3 of base station 12 as data；Data needed during being wirelessly transferred through
Cross the calibration of GPS synchronised clocks 2；Base station (12) data collecting system 3 is received and recorded after the calibration of GPS synchronised clocks 2
Data；The data that base station data analysis system 4 records according to base station data acquisition system 3 are analyzed, and judge cable health shape
Whether state is normal, is that normal data are ignored for result of determination, continues said process；For judged result for not
Normal data are wirelessly sent to electric network data acquisition system 5；Electric network data analysis system 6 is according to electric network data acquisition system 5
The data of record are further analyzed；Carry out the fault data and cable that fault simulating test obtains under various circumstances based on cable
The data collected when being broken down in practical service environment, establish Mishap Database 7；Electric network data analysis system 6 is carried out
Complicated wavelet theory analysis, draw analysis result and then utilize Fuzzy Pattern Recognition Theory and the failure classes in Mishap Database 7
Type is matched, and draws the fault type of cable；Accident warning device 8 sends fault alarm, and in GPS graphic display systems
9 show faulty line particular location and fault type.
More specific description is：Current signal collection is to utilize Rogowski coil collection current signal, current acquisition
Frequency is 1MHz, and power frequency 50Hz normal current signals had both been contained in the current component so collected, have contained overhead line again
Road cable health is in high-frequency current signal during unhealthy condition；Current signal pretreatment be the current signal that will collect by
According to the rule of wavelet data analysis theories, Signal Pretreatment is carried out, power frequency 50Hz low frequency signal is removed, obtains above-mentioned K1 and K2
The high-frequency current signal collected, function f (K1) and function f (K2) are denoted as respectively；It is to above-mentioned two letter that signal, which makes the difference analysis,
Number f (K1) and f (K2) makes the difference carry out wavelet analysis, i.e. function f (f (K1)-f (K2)) carries out wavelet analysis, healthy overhead transmission line
The high-frequency current signal f (K1) and f (K2) that the initiating terminal of cable and end collect should be identical in theory, if aerial
Line cord between initiating terminal and end during the healthy generation problem of cable, deposit by the theoretical listing of high-frequency current signal collected
Carry out wavelet analysis is now made the difference to high-frequency current signal in difference；It is to above-mentioned high-frequency current signal to extract signal extreme point
Carry out wavelet analysis is made the difference, signal extreme point is extracted, is ranked up according to time series, draws the accurate of signal extreme's distribution
Data；Base station data analysis is that base station data analysis system carries out tentatively judging that cable is good for according to the data of signal extreme's distribution
Whether health state is normal；If it is judged that being normal, continue current signal collection；Test to Failure simulation is to pass through experiment
The various different faults that simulation overhead transmission line cable is likely to occur, failure is carried out according to the experience accumulation of staff,
Accumulation is continuously replenished in practical application；Current signal collection, current signal pretreatment, signal make the difference analysis, extraction signal extreme value
The method of point is identical with the above method, is not repeated to describe；Establishing Mishap Database is tried according to the failure of above-mentioned simulation
Test and be defined as fault type, the signal extreme point for analyzing to obtain using wavelet data is defined as fault data, fault type and
Fault data is corresponded and is stored in Mishap Database, and it is readily identified to distribute corresponding failure code to fault type；Mould
If paste pattern-recognition refers to base station data analysis system judged result to be abnormal, by signal extreme point and Mishap Database
In fault data carry out Fuzzy Pattern Recognition, according to fuzzy recognition algorithm, calculate the signal extreme point of overhead transmission line cable with
The similarity of fault data, similarity are 0 to 1 numerical value；Identify that fault type is according to Fuzzy Pattern Recognition result, similarity
Closer to 1, overhead transmission line cable is bigger for the possibility of such failure, otherwise similarity, closer to 0, overhead transmission line cable is should
The possibility of class failure is smaller.
Embodiment two
Embodiment two provides aerial cable health status monitoring method and cable health status monitoring system, including embodiment
The Overall Steps of method, will not be repeated here in one, and embodiment two gives overhead transmission line cable health status monitoring system
Distribution map, as shown in figure 5, including following,
By taking a certain section of overhead transmission line cable as an example, the both ends of the overhead transmission line cable are erected at frame by fixing point 10 respectively
On empty line steel tower 11, Rogowski coil 1 is arranged respectively at overhead transmission line cable both ends, according to Rogowski coil 1
Position it is different, numbering K1, K2 ... KN respectively；
Base station 12 is transformer station of basic unit, GPS synchronised clocks 2, base station data acquisition system 3 and base station data analysis system 4
Three units are arranged on base station 12；
Management station 13 is the upper level electric substation of transformer station of basic unit, abnormal data acquisition system 5, Mishap Database 6, is managed
Stand 9 five data analysis system 7, accident warning device 8 and step GPS graphic display systems units are arranged on management station 13.
Data acquisition distribution is key in the present invention, widely distributed because aerial cable is out of doors, uses overhead line support towers
11 high-altitudes are set up, if making an inspection tour whether observation cable health status changes and can not possibly realize by electric power personnel are trickle；With
Exemplified by a certain section of overhead transmission line, the initiating terminal of the A phases of the overhead transmission line cable and end are separately fixed at overhead transmission line cable
On fixing point 10, Rogowski coil 1 is covered respectively in the initiating terminal of A phases and end, according to the position of Rogowski coil 1
Difference is put, respectively numbering K1, K2 ... KN；In order to manage the transformer station of basic unit that base station 11 conveniently, is located to power system, base station 12
In comprising GPS synchronised clocks 2,4 three units of base station data acquisition system and base station data analysis system；System 13 is located at electricity
The lower management station upper level unit electric substation of Force system, analyzed comprising electric network data acquisition system 5, electric network data in system 13
System 6, Mishap Database, accident warning device 8, GPS graphic display systems 9；Above-mentioned data acquisition distributed architecture is simple
Structure-steel framing figure, can be more complicated according to above-mentioned Organization Chart is actually needed, including the scope of overhead transmission line cable is wider, but substantially
Operation principle is identical.
Embodiment three
Embodiment three provides a kind of aerial cable health status monitoring method, including the whole of method walk in embodiment one
Suddenly, will not be repeated here.Embodiment three gives the determination methods of failure overhead transmission line cable position,
Also include after step 7,
Step 8：Fault alarm, it is judged as the event of overhead transmission line cable fault for management station 13, utilizes acousto-optic-electric
Mode notifies operator on duty, and failure code is shown, there is provided to operator on duty；
Step 9：GPS figure shows, the position of failure overhead transmission line cable is shown on GPS figures, watch
Member is accurately judged to the position coordinates of failure overhead transmission line cable according to figure shows, targetedly takes measures.
As shown in fig. 6, for the present invention in fault tree schematic diagram, the determination methods of failure overhead transmission line cable position, including
Following steps：Management station 13 monitors faulty generation, the base station 12 belonging to failure judgement overhead transmission line cable；The basis of base station 12
The position of the numbering failure judgement overhead transmission line cable of Rogowski coil 1.
The health status monitoring process of overhead transmission line cable is distributed and set accordingly according to fault tree principle step by step according to level
It is standby to complete corresponding function；Tree root corresponds to system 13, and branch corresponds to base station 12, and leaf corresponds to consolidating for overhead transmission line cable
Rogowski coil 1 in fixed point 10；Above-mentioned line fault distributed architecture is simple structure-steel framing figure, on being actually needed
Stating Organization Chart can be more complicated, including the scope of overhead transmission line cable is wider, but basic functional principle is identical.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (9)
1. aerial cable current data analysis method, it is characterised in that comprise the following steps,
Step 41：Current signal pre-processes, and the current signal of two positions removes power frequency 50Hz signals in a certain phase of aerial cable
The high-frequency current signal of two positions is obtained afterwards, is denoted as f (K1), f (K2) respectively；
Step 42：Signal makes the difference analysis, and f (K1), f (K2) make the difference, if identical, monitoring circuit cable health status be it is normal,
If it is not the same, wavelet analysis is carried out to f (K1)-f (K2)；
Step 43：Difference extreme point is extracted, the difference extreme point of wavelet analysis, is ranked up according to the time in extraction step 42,
Draw difference extreme's distribution waveform；
Step 44：Data analysis, for difference extreme's distribution waveform compared with reference waveform, judgement draws overhead transmission line cable health
Whether state is normal.
A kind of 2. aerial cable health status monitoring side using claim 1 aerial cable current data initial analysis method
Method, it is characterised in that comprise the following steps：
Step 1：Current acquisition, at least two corresponding numbering of current collector distribution and 71P addresses, gather it on aerial cable
Position current signal, it is wirelessly transmitted to base station (12)；
Step 2：GPS synchronous clock calibratings, the difference according to each current collector apart from base station (12) position, consider that signal passes
The defeated time difference, carry out time calibration；
Step 3：Base station data acquisition and recording, base station (12) receive the data after gps clock synchronous calibration, and are remembered
Record；
Step 4：Base station data is analyzed, the data that base station (12) record according to step 3, at the beginning of carrying out overhead transmission line cable current data
Level analysis, is ignored for normal data, and management station is sent to using the mode being wirelessly transferred for the data of exception
(13)；
Step 5：Abnormal data gathers, and management station (13) receives the abnormal data that base station (12) are sent, and is recorded；
Step 6：Establish Mishap Database (6)；
Step 7：Management station's data analysis, the data that management station (13) records according to step 5 carry out current data secondary analysis, obtained
To difference extreme point, characteristic parameter, sequential and frequency, then using Fuzzy Pattern Recognition, by the knot of current data secondary analysis
Fruit is matched with the fault data in the Mishap Database (6), obtains the fault type of overhead transmission line cable.
3. aerial cable health status monitoring method according to claim 2, it is characterised in that also include after step 7,
Step 8：Fault alarm, it is judged as the event of overhead transmission line cable fault for management station (13), utilizes the side of acousto-optic-electric
Formula notifies operator on duty, and failure code is shown, there is provided to operator on duty；
Step 9：GPS figure shows, the position of failure overhead transmission line cable is shown on GPS figures, operator on duty's root
The position coordinates of failure overhead transmission line cable is accurately judged to according to figure shows, is targetedly taken measures.
4. aerial cable health status monitoring method according to claim 2, it is characterised in that step 6 specifically,
Step 61：Overhead transmission line cable carries out fault simulating test under various circumstances, records fault type and corresponding failure
Data；
Step 62：The failure that overhead transmission line cable occurs in practical service environment, record fault type and corresponding number of faults
According to；
Step 63：Fault type and fault data, which correspond, in step 61, step 62 is stored in Mishap Database (6), and
Corresponding failure code is distributed for fault type.
5. aerial cable health status monitoring method according to claim 2, it is characterised in that in step 7, current data
Secondary analysis comprise the following steps：
Step 71, signal makes the difference analysis, and carry out wavelet analysis is made the difference to the high-frequency current signal f (K1) and f (K2) of abnormal data；
Step 72, difference extreme point, characteristic parameter, sequential and frequency in extraction step 71.
6. aerial cable health status monitoring method according to claim 2, it is characterised in that in step 7, fuzzy pattern
Identification comprises the following steps：
Step 73, the result of current data secondary analysis and the similarity of fault data in step 6, similarity in calculation procedure 7
It is designated as 0~1 numerical value；
Step 74, according to the numerical identification fault type and possibility of similarity.
7. aerial cable health status monitoring method according to claim 6, it is characterised in that according to the numerical value of similarity
Closer to 1, overhead transmission line cable is bigger for the possibility of such failure, and for similarity closer to 0, overhead transmission line cable is such event
The possibility of barrier is smaller.
A kind of 8. aerial cable health shape using any one of the claim 3~7 aerial cable health status monitoring method
State monitoring system, it is characterised in that including
At least two are arranged on the current collector on overhead transmission line cable, the current collector include controller and with control
The Rogowski coil (1) and GPS synchronised clocks (2) of device connection processed,
Controller and base station data acquisition system (3), base station data analysis system (4), abnormal data acquisition system (5), failure
Database (6) and management station's data analysis system (7) are sequentially connected,
Rogowski coil (1) the both ends docking is set on overhead transmission line cable, the Rogowski coil (1)
Sample frequency is 1MHz, and controller will collect current signal data by way of being wirelessly transferred and send the base station data to
Acquisition system (3),
The GPS synchronised clocks (2) are synchronous with satellite GPS synchronised clocks, and for according to each Rogowski coil (1)
The time difference of difference, consideration signal transmission apart from base station (12) position, the GPS synchronised clocks for carrying out time calibration.
9. aerial cable health status monitoring system according to claim 8, it is characterised in that：Also include described management
The accident warning device (8) of data analysis system (7) of standing connection, accident warning device (8) are connected with GPS graphic display systems
(9), the GPS graphic display systems (9) include several GPS positioning devices being arranged on overhead transmission line cable.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378797A (en) * | 2018-09-17 | 2019-02-22 | 深圳供电局有限公司 | High-voltage overhead line disconnection protection and identification method |
| CN110007196A (en) * | 2019-05-05 | 2019-07-12 | 华北电力大学（保定） | A method of on-line monitoring cable fault position |
| CN112485585A (en) * | 2020-10-26 | 2021-03-12 | 中铁第一勘察设计院集团有限公司 | Health state diagnosis system and method for cable through line |
| CN114545162A (en) * | 2022-02-15 | 2022-05-27 | 国网湖南省电力有限公司 | Distributed transmission line insulation performance online monitoring method |
| CN116520068A (en) * | 2023-07-04 | 2023-08-01 | 深圳博润缘科技有限公司 | Diagnostic method, device, equipment and storage medium for electric power data |
| CN116582772A (en) * | 2023-03-29 | 2023-08-11 | 四川辰鳗科技有限公司 | Electric energy data acquisition method, system, electronic equipment and medium |
| WO2024078344A1 (en) * | 2023-03-03 | 2024-04-18 | 北京全路通信信号研究设计院集团有限公司 | Monitoring method, system and apparatus for quality of high-frequency external power grid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813740A (en) * | 2010-05-13 | 2010-08-25 | 天津市翔晟远电力设备实业有限公司 | System and method for detecting high voltage transmission line faults |
| CN101907437A (en) * | 2010-07-23 | 2010-12-08 | 西安科技大学 | Wavelet difference algorithm-based cable fault localization method |
| US20110074437A1 (en) * | 2009-09-30 | 2011-03-31 | Korea Electric Power Corporation | System and method for detecting a location of fault in a cable |
| CN104765971A (en) * | 2015-04-23 | 2015-07-08 | 东北电力大学 | Crosslinked polyethylene high-voltage cable partial discharge feature extraction method |
| CN105738764A (en) * | 2016-02-22 | 2016-07-06 | 国家电网公司 | Power distribution network faulty section positioning method based on transient information full frequency band |
-
2017
- 2017-09-08 CN CN201710807804.6A patent/CN107632240B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110074437A1 (en) * | 2009-09-30 | 2011-03-31 | Korea Electric Power Corporation | System and method for detecting a location of fault in a cable |
| CN101813740A (en) * | 2010-05-13 | 2010-08-25 | 天津市翔晟远电力设备实业有限公司 | System and method for detecting high voltage transmission line faults |
| CN101907437A (en) * | 2010-07-23 | 2010-12-08 | 西安科技大学 | Wavelet difference algorithm-based cable fault localization method |
| CN104765971A (en) * | 2015-04-23 | 2015-07-08 | 东北电力大学 | Crosslinked polyethylene high-voltage cable partial discharge feature extraction method |
| CN105738764A (en) * | 2016-02-22 | 2016-07-06 | 国家电网公司 | Power distribution network faulty section positioning method based on transient information full frequency band |
Non-Patent Citations (1)
| Title |
|---|
| 王建顺: "基于低压脉冲法的煤矿高压电力电缆故障定位研究", 《万方数据》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378797A (en) * | 2018-09-17 | 2019-02-22 | 深圳供电局有限公司 | High-voltage overhead line disconnection protection and identification method |
| CN110007196A (en) * | 2019-05-05 | 2019-07-12 | 华北电力大学（保定） | A method of on-line monitoring cable fault position |
| CN112485585A (en) * | 2020-10-26 | 2021-03-12 | 中铁第一勘察设计院集团有限公司 | Health state diagnosis system and method for cable through line |
| CN114545162A (en) * | 2022-02-15 | 2022-05-27 | 国网湖南省电力有限公司 | Distributed transmission line insulation performance online monitoring method |
| WO2024078344A1 (en) * | 2023-03-03 | 2024-04-18 | 北京全路通信信号研究设计院集团有限公司 | Monitoring method, system and apparatus for quality of high-frequency external power grid |
| CN116582772A (en) * | 2023-03-29 | 2023-08-11 | 四川辰鳗科技有限公司 | Electric energy data acquisition method, system, electronic equipment and medium |
| CN116582772B (en) * | 2023-03-29 | 2024-01-16 | 四川辰鳗科技有限公司 | Electric energy data acquisition method, system, electronic equipment and medium |
| CN116520068A (en) * | 2023-07-04 | 2023-08-01 | 深圳博润缘科技有限公司 | Diagnostic method, device, equipment and storage medium for electric power data |
| CN116520068B (en) * | 2023-07-04 | 2023-09-22 | 深圳博润缘科技有限公司 | Diagnostic method, device, equipment and storage medium for electric power data |
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