CN107632223A - A kind of arrester diagnostic method, device, terminal and computer-readable recording medium - Google Patents
A kind of arrester diagnostic method, device, terminal and computer-readable recording medium Download PDFInfo
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Abstract
The invention provides a kind of arrester diagnostic method, device, terminal and computer-readable recording medium, wherein, this method includes：Receive same position three-phase lightning protector three-phase detection parameter；The three-phase leakage current vector of three-phase lightning protector is calculated according to three-phase detection parameter；Arrester is diagnosed according to three-phase leakage current vector.This diagnostic method to the vector that three-phase leakage current is formed carries out that objective data are calculated, and three-phase lightning protector running status situation is obtained by data comparison, realizes the quantization of arrester running status, the clear definition for the treatment of measures, improves the accuracy of diagnosis.
Description
Technical field
The present invention relates to arrester live detection technical field, and in particular to a kind of arrester diagnostic method, device, terminal
And computer-readable recording medium.
Background technology
Arrester is to be used to protect high transient overvoltage when circuit and electrical equipment are from thunderbolt in power system, operated
The harm of voltage, Frequency Transient Overvoltage, and time of afterflow is limited, also often a kind of electrical equipment of limitation afterflow assignment, arrester have
When be also referred to as overvoltage protection device or overvoltage limiter.Arrester is connected between cable and the earth, generally with being set by protection
It is standby in parallel, it can effectively protect electrical equipment.When electrical equipment is run under normal working voltage, arrester will not produce
Effect, is considered as open circuit for ground；When there is high voltage and jeopardize insulated by protection equipment when, arrester acts immediately, will
High-voltage impact conduct current the earth, so as to limit voltage magnitude, protect power circuit and equipment；After having served as loss of voltage, keep away
Thunder device restores to the original state rapidly, makes electrical equipment normal work.
The arrester overvoltage protective device important as power system, the quality of itself operation conditions will directly affect
To the safety of power system.Due to being run for a long time under the environment of voltage levels and open air, the service behaviour meeting of arrester
Change, and be easily damaged, and the consequence that arrester breaks down is very serious, can not only lose protection equipment and circuit
Basic function, or even can also cause Hyper-Voltage of Power Systems accident.Therefore, live detection is carried out to arrester and seems particularly heavy
Will.
Arrester live detection technology is widely used in Site Detection, wherein, Leakage Current live detection method is a kind of
The detection method of arrester running status can effectively be judged.Leakage current of an arrester (or total current) is application continuous running voltage
When flow through the electric current of arrester, the resistive current first harmonics situation of change in total current and total current, which can be used as, to be judged in arrester
The reference frame that whether portion makes moist, whether metal oxide valve block deteriorates.At present, chatting according to Q/GDW 11369-2014
State, arrester aging, the problems such as making moist can by contrasting with circuit three-phase lightning protector measurement result, or with last time measurement result
Contrasted, think that arrester has problem if numerical value difference is larger.This diagnostic method has the following disadvantages, first,
Judge that the method for arrester running status has more subjective composition using data comparison, not enough quantify；Secondly, obtaining
After measurement result, the boundary for the treatment of measures (such as supervision or interruption maintenance) is taken arrester to obscure, the accuracy of diagnosis
It is low.
The content of the invention
Therefore, the technical problem to be solved in the present invention is to overcome arrester diagnostic method of the prior art not enough to measure
Change, the defects of at least one treatment measures boundary is fuzzy and diagnosis accuracy is low.
Therefore, first aspect present invention, there is provided a kind of arrester diagnostic method, including：Same position three-phase is received to take shelter from the thunder
Device three-phase detection parameter；The three-phase leakage current vector of the three-phase lightning protector is calculated according to the three-phase detection parameter；According to
The three-phase leakage current vector diagnoses to the arrester.
Alternatively, carrying out diagnosis to the arrester according to the three-phase leakage current vector includes：According to the three-phase
Leakage Current vector calculates the cross-correlation coefficient two-by-two of the three-phase leakage current vector；According to the cross-correlation coefficient pair two-by-two
The arrester is diagnosed.
Alternatively, the cross correlation two-by-two of the three-phase leakage current vector is calculated according to three-phase Leakage Current vector
Number includes：
The cross-correlation coefficient two-by-two is obtained by equation below：
Wherein：rABFor the coefficient correlation of A, B two-phase arrester in the three-phase lightning protector；rBCFor the three-phase lightning protector
The coefficient correlation of middle B, C two-phase arrester；rCAFor the coefficient correlation of C, A two-phase arrester in the three-phase lightning protector；IXAFor institute
State A phases Leakage Current vector in three-phase leakage current vector；IXBFor B phases Leakage Current in the three-phase leakage current vector to
Amount；IXCFor C phases Leakage Current vector in the three-phase leakage current vector；Cov is expressed as inner product of vectors；For the A phases
Leakage Current vector length；For the B phases Leakage Current vector length；For the C phases Leakage Current vector length.
Alternatively, carrying out diagnosis to the arrester according to the cross-correlation coefficient two-by-two includes：In rABLess than the first threshold
Value, rCALess than Second Threshold, rBCDuring more than three threshold values, diagnosis A phases arrester is abnormal；In rABLess than the 4th threshold value, rBCIt is less than
5th threshold value, rCADuring more than six threshold values, diagnosis B phases arrester is abnormal；In rBCLess than the 7th threshold value, rCALess than the 8th threshold value,
rABDuring more than nine threshold values, diagnosis C phases arrester is abnormal.
Alternatively, the three-phase detection parameter includes the Leakage Current of each phase, the reference voltage of each phase and each phase
The Leakage Current and reference voltage between angle, calculate the three of the three-phase lightning protector according to the three-phase detection parameter
Phase leakage current vector includes：The resistive fundamental wave of each phase arrester of three-phase lightning protector is calculated according to the three-phase detection parameter
Current component, resistive triple harmonic current component and capacitive fundamental current component；According to the resistive base of each phase arrester
Ripple current component, resistive triple harmonic current component and capacitive fundamental current component calculate each phase arrester of three-phase lightning protector
Leakage current vector.
Alternatively, the arrester is diagnosed according to the three-phase leakage current vector, in addition to：Examined described in display
Disconnected result.
Alternatively, the diagnostic result is included by the cross-correlation coefficient two-by-two compared with predetermined threshold, and described two
When two cross-correlation coefficients are all higher than the predetermined threshold, the three-phase lightning protector running status is good.
Second aspect of the present invention, there is provided a kind of arrester diagnostic device, including：Receiving module, for receiving same position
Three-phase lightning protector three-phase detection parameter；Vector module, for calculating the three-phase lightning protector according to the three-phase detection parameter
Three-phase leakage current vector；Diagnostic module, for being diagnosed according to the three-phase leakage current vector to the arrester.
Alternatively, the vector module includes：First processing module, for calculating three-phase according to the three-phase detection parameter
Resistive fundamental current component, resistive triple harmonic current component and the capacitive fundamental current point of each phase arrester of arrester
Amount；Second processing module, for the resistive fundamental current component according to each phase arrester, resistive triple harmonic current point
Amount and capacitive fundamental current component calculate the leakage current vector of each phase arrester of three-phase lightning protector.
Alternatively, the diagnostic module includes：3rd processing module, for being calculated according to three-phase Leakage Current vector
The cross-correlation coefficient two-by-two of the three-phase leakage current vector；Comparison module, for according to described in two-by-two cross-correlation coefficient to institute
Arrester is stated to be diagnosed.
Alternatively, the diagnostic module also includes：Display module, for showing the diagnostic result.
Third aspect present invention, there is provided a kind of terminal, including：At least one processor；And with least one place
Manage the memory of device communication connection；Wherein, have can be by the instruction of one computing device, the finger for the memory storage
Order is by least one computing device, so that any institute at least one computing device the claims 1-7
The method stated.
Fourth aspect present invention, there is provided a kind of computer-readable recording medium, be stored thereon with computer instruction, its feature
It is, any methods described in the claims 1-7 is realized in instruction when being executed by processor the step of.
Technical solution of the present invention, have the following advantages that：
The invention provides a kind of arrester diagnostic method, device, terminal and computer-readable recording medium, wherein, should
Method includes：Receive same position three-phase lightning protector three-phase detection parameter；Three-phase lightning protector is calculated according to three-phase detection parameter
Three-phase leakage current vector；Arrester is diagnosed according to three-phase leakage current vector.This diagnostic method is leaked three-phase
The vector that electric current is formed carries out that objective data are calculated, and three-phase lightning protector running status situation is obtained by data comparison,
Realize the quantization of arrester running status, the clear definition for the treatment of measures, improve the accuracy of diagnosis.
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 the flow chart of a specific example of arrester diagnostic method in the embodiment of the present invention；
Fig. 2 is the flow chart of another specific example of arrester diagnostic method in the embodiment of the present invention；
Fig. 3 is the system block diagram of a specific example of arrester diagnostic device in the embodiment of the present invention；
Fig. 4 is the structural representation of the terminal of the embodiment of the present invention.
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.
The present embodiment provides a kind of arrester diagnostic method, as shown in figure 1, comprising the following steps：
S01：Receive same position three-phase lightning protector three-phase detection parameter.In the present embodiment, three-phase detection parameter includes
Angle between the Leakage Current and reference voltage of the Leakage Current of each phase, the reference voltage of each phase and each phase, A phases are examined
Survey parameter is IA, UA, δA；B phases detection parameters are IB, UB, δB；C phases detection parameters are IC, UC, δC, certainly, in other embodiments
Other detectable parameters, such as total current, reasonable selection as needed can also be included.
S02：The three-phase leakage current vector of three-phase lightning protector is calculated according to three-phase detection parameter.In the present embodiment, have
Body is：
S021：According to three-phase detection parameter calculate three-phase lightning protector each phase arrester resistive fundamental current component,
Resistive triple harmonic current component and capacitive fundamental current component.Three-phase detection parameter passes through time domain conversion and Fourier analysis meter
Calculate resistive fundamental current component, resistive triple harmonic current component and the capacitive base for each phase arrester for obtaining three-phase lightning protector
Ripple current component, each phase Leakage Current component include resistive fundamental current component, resistive triple harmonic current component and capacitive
Fundamental current component, remaining component values is smaller, ignores, and certainly, in other embodiments, can also include other harmonic waves
Component, such as resistive quintuple harmonics current component, capacitive triple harmonic current component, harmonic component is more, three-phase leakage current point
Amount is more complicated, and the diagnostic result finally given is more accurate, but operating process can more complicated, reasonable selection as needed.
In the present embodiment, the expression formula of three-phase Leakage Current component is as follows：
IXA=Ir1A sinωt+Ir3A sin(3ωt+π)+Ic1A sin(ωt+π/2)
IXB=Ir1B sinωt+Ir3B sin(3ωt+π)+Ic1B sin(ωt+π/2)
IXC=Ir1C sinωt+Ir3C sin(3ωt+π)+Ic1C sin(ωt+π/2)
Wherein：Ir1AFor the resistive fundamental current component of A phase Leakage Current components, Ir3AFor the resistance of A phase Leakage Current components
Property triple harmonic current component, Ic1AFor the capacitive fundamental current component of A phase Leakage Current components；Ir1BFor B phases Leakage Current point
The resistive fundamental current component of amount, Ir3BFor the resistive triple harmonic current component of B phase Leakage Current components, Ic1BRevealed for B phases
The capacitive fundamental current component of current component；Ir1CFor the resistive fundamental current component of C phase Leakage Current components, Ir3CLet out for C phases
Reveal the resistive triple harmonic current component of current component, Ic1CFor the capacitive fundamental current component of C phase Leakage Current components.
S022：According to the resistive fundamental current component of each phase arrester, resistive triple harmonic current component and capacitive base
Ripple current component calculates the leakage current vector of each phase arrester of three-phase lightning protector.It is by three-phase leakage current representation in components
Three-phase leakage current vector form, i.e. three-phase Leakage Current vector includes the resistive fundamental current component of each phase, each phase
The capacitive fundamental current component of resistive triple harmonic current component and each phase, three-phase leakage current vector expression are：
IXA=[Ir1A, Ir3A, Ic1A]
IXB=[Ir1B, Ir3B, Ic1B]
IXC=[Ir1C, Ir3C, Ic1C]
S03：Arrester is diagnosed according to three-phase leakage current vector.In the present embodiment, it is specially：
S031：The cross-correlation coefficient two-by-two of three-phase leakage current vector, two two-phases are calculated according to three-phase Leakage Current vector
Relation number is obtained by equation below：
Wherein, rABFor the coefficient correlation of A, B two-phase arrester in three-phase lightning protector；rBCFor B, C two-phase in three-phase lightning protector
The coefficient correlation of arrester；rCAFor the coefficient correlation of C, A two-phase arrester in three-phase lightning protector；IXAFor three-phase leakage current to
A phases Leakage Current vector in amount；IXBFor B phases Leakage Current vector in three-phase leakage current vector；IXCFor three-phase leakage current to
C phases Leakage Current vector in amount；Cov is expressed as inner product of vectors；For A phase Leakage Current vector lengths；Revealed for B phases
Current vector length；For C phase Leakage Current vector lengths.
S032：Arrester is diagnosed according to cross-correlation coefficient two-by-two.Coefficient correlation two-by-two is sentenced with what is prestored
Calibration standard is compared, and obtains arrester running status situation and Strategies of Maintenance.In the present embodiment, criterion is according to Q/
GDW 11369-2014 requirements, if the test period should be shortened when total current or current in resistance property difference are more than 70% and strengthen supervising
Survey, need to have a power failure during more than 1 times detection, in combination with scene actually, following criterion be obtained, when coefficient correlation numerical value is more than
When 0.95, illustrate that arrester running status is good, arrester is carried out normally to make an inspection tour；When coefficient correlation numerical value arrives 0.9
When between 0.95, illustrate that arrester running status is general, need to be to arrester supervision；When coefficient correlation is less than 0.9, explanation
Arrester running status is serious, need to carry out power failure detection to arrester, be changed if necessary；Certainly, in other embodiments,
Numerical value in criterion is it can also be provided that other values, such as 0.9 and 0.8, reasonable selection as needed.In the present embodiment
Criterion it is as shown in table 1.
Arrester live detection criterion of the table 1 based on coefficient correlation
In the present embodiment, can be according to the relation of coefficient correlation two-by-two when the phase in three-phase lightning protector breaks down
Diagnostic result quickly is drawn, can so reduce the malfunction elimination time, improves diagnosis efficiency.In rABLess than first threshold, rCAIt is small
In Second Threshold, rBCDuring more than three threshold values, diagnosis A phases arrester is abnormal；In rABLess than the 4th threshold value, rBCLess than the 5th threshold
Value, rCADuring more than six threshold values, diagnosis B phases arrester is abnormal；In rBCLess than the 7th threshold value, rCALess than the 8th threshold value, rABIt is more than
During nine threshold values, diagnosis C phases arrester is abnormal.In the present embodiment, said with reference to a specific example by taking the first situation as an example
Bright, first threshold 0.8, Second Threshold 0.8, the 3rd threshold value is 0.9, two-by-two correlation coefficient rABFor 0.51, rBCFor 0.99,
rCACoefficient correlation for 0.52, A phases arrester and B, C two-phase arrester is below first threshold and Second Threshold, therefore, judges
A phase arrester defect problems are more serious, need interruption maintenance immediately.
S033：Show diagnostic result.Diagnostic result include will cross-correlation coefficient is compared with predetermined threshold two-by-two, two-by-two
When cross-correlation coefficient is all higher than predetermined threshold, three-phase lightning protector running status is good, it is only necessary to which arrester is normally maked an inspection tour.
In the present embodiment, predetermined threshold is arranged to 0.95, certainly, in other embodiments, it can also be provided that other values, such as 0.9, root
Rationally set according to needs.
Arrester diagnostic method provided by the invention, including：Receive same position three-phase lightning protector three-phase detection parameter；Root
The three-phase leakage current vector of three-phase lightning protector is calculated according to three-phase detection parameter；Arrester is entered according to three-phase leakage current vector
Row diagnosis.This diagnostic method to the vector that three-phase leakage current is formed carries out that objective data are calculated, and passes through data pair
Than obtaining three-phase lightning protector running status situation, the quantization of arrester running status is realized, the clear definition for the treatment of measures, is improved
The accuracy of diagnosis.
Illustrated with reference to a specific alternative embodiment.As shown in Fig. 2 obtain same position A, B, C three-phase
Leakage Current, reference voltage and the angle of arrester；Calculate the resistive fundametal compoment, resistive humorous three times of A, B, C three-phase lightning protector
Wave component and capacitive fundametal compoment；Three-phase is formed according to resistive fundametal compoment, resistive third-harmonic component and capacitive fundametal compoment
The Leakage Current vector of arrester, is all by the mutually resistive fundametal compoment, resistive third-harmonic component per phase Leakage Current vector
Formed with capacitive fundametal compoment；Calculate the cross-correlation coefficient two-by-two of three phase vectors, the reference quantity as diagnosis；By phase relation two-by-two
Number obtains arrester running status situation and Strategies of Maintenance compared with the criterion prestored；Show arrester fortune
Row state status and Strategies of Maintenance.
The present embodiment also provides a kind of arrester diagnostic device, and the device is used to realize above-described embodiment and the side of being preferable to carry out
Formula, repeating no more for explanation was carried out.Term " module " as used below can realize predetermined function software and/
Or the combination of hardware.Although system described by following examples is preferably realized with software, hardware, or software and
The realization of the combination of hardware is also what may and be contemplated.
Fig. 3 is the system block diagram of a specific example of arrester diagnostic device according to embodiments of the present invention, including：
Receiving module 31, for receiving same position three-phase lightning protector three-phase detection parameter；Vector module 32, for basis
Three-phase detection parameter calculates the three-phase leakage current vector of three-phase lightning protector, and vector module 32 includes first processing module 321, used
In resistive fundamental current component, the resistive triple-frequency harmonics of each phase arrester that three-phase lightning protector is calculated according to three-phase detection parameter
Current component and capacitive fundamental current component, Second processing module 322, for the resistive fundamental current according to each phase arrester
Component, resistive triple harmonic current component and capacitive fundamental current component calculate the leakage of each phase arrester of three-phase lightning protector
Current vector；Diagnostic module 33, for being diagnosed according to three-phase leakage current vector to arrester, diagnostic module 33 includes the
Three processing modules 331, for calculating the cross-correlation coefficient two-by-two of three-phase leakage current vector according to three-phase Leakage Current vector；Than
Compared with module 332, for being diagnosed according to cross-correlation coefficient two-by-two to arrester；Display module 333, for showing diagnosis knot
Fruit.The advantages of there is this arrester diagnostic device arrester running status to quantify, treatment measures are clear and definite, diagnosis accuracy is high.
The further function description of above-mentioned modules is identical with above-mentioned corresponding embodiment, will not be repeated here.
Referring to Fig. 4, Fig. 4 is the hardware architecture diagram for the arrester diagnostic device that alternative embodiment of the present invention provides,
As shown in figure 4, the terminal can include：At least one processor 401, such as CPU (Central Processing Unit, in
Central processor), at least one communication interface 403, memory 404, at least one communication bus 402.Wherein, communication bus 402
For realizing the connection communication between these components.Wherein, communication interface 403 can include display screen (Display), keyboard
(Keyboard), optional communication interface 403 can also include wireline interface, the wave point of standard.Memory 404 can be high
Fast RAM memory (Ramdom Access Memory, effumability random access memory) or non-labile deposit
Reservoir (non-volatile memory), for example, at least a magnetic disk storage.Memory 404 optionally can also be at least
One storage device for being located remotely from aforementioned processor 401.Wherein processor 401 can be stored with device described in conjunction with Figure 3
Batch processing code is stored in device 404, and processor 401 calls the program code stored in memory 404, for performing one
Kind arrester diagnostic method, that is, it is used to perform the arrester diagnostic method as in Fig. 1 and Fig. 2 embodiments.
Wherein, communication bus 402 can be Peripheral Component Interconnect standard (peripheral component
Interconnect, abbreviation PCI) bus or EISA (extended industry standard
Architecture, abbreviation EISA) bus etc..Communication bus 402 can be divided into address bus, data/address bus, controlling bus etc..
For ease of representing, only represented in Fig. 4 with a thick line, it is not intended that an only bus or a type of bus.
Wherein, memory 404 can include volatile memory (English：Volatile memory), such as arbitrary access
Memory (English：Random-access memory, abbreviation：RAM)；Memory can also include nonvolatile memory (English
Text：Non-volatile memory), such as flash memory (English：Flash memory), hard disk (English：hard disk
Drive, abbreviation：HDD) or solid state hard disc is (English：Solid-state drive, abbreviation：SSD)；Memory 404 can also wrap
Include the combination of the memory of mentioned kind.
Wherein, processor 401 can be central processing unit (English：Central processing unit, abbreviation：
CPU), network processing unit (English：Network processor, abbreviation：NP) or CPU and NP combination.
Wherein, processor 401 can further include hardware chip.Above-mentioned hardware chip can be application specific integrated circuit
(English：Application-specific integrated circuit, abbreviation：ASIC), PLD (English：
Programmable logic device, abbreviation：PLD) or it is combined.Above-mentioned PLD can be CPLD
(English：Complex programmable logic device, abbreviation：CPLD), field programmable gate array (English：
Field-programmable gate array, abbreviation：FPGA), GAL (English：generic array
Logic, abbreviation：GAL) or it is combined.
Alternatively, memory 404 is additionally operable to storage program instruction.Processor 401 can be instructed with caller, be realized such as this
Apply for the arrester diagnostic method shown in Fig. 1 and Fig. 2 embodiments.
The embodiment of the present invention also provides a kind of computer-readable recording medium, and meter is stored with computer-readable recording medium
Calculation machine executable instruction, the computer executable instructions can perform the arrester diagnostic method in above-mentioned any means embodiment.
Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM), random storage
Memory body (Random Access Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk
Drive, abbreviation：) or solid state hard disc (Solid-State Drive, SSD) etc. HDD；The storage medium can also include above-mentioned
The combination of the memory of species.
It is to lead to it will be understood by those skilled in the art that realizing all or part of flow in above-described embodiment method
Computer program is crossed to instruct the hardware of correlation to complete, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (ROM) or random access memory (RAM) etc..
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 (13)
1. a kind of arrester diagnostic method, it is characterised in that comprise the following steps：
Receive same position three-phase lightning protector three-phase detection parameter；
The three-phase leakage current vector of the three-phase lightning protector is calculated according to the three-phase detection parameter；
The arrester is diagnosed according to the three-phase leakage current vector.
2. arrester diagnostic method according to claim 1, it is characterised in that right according to the three-phase leakage current vector
The arrester, which carries out diagnosis, to be included：
The cross-correlation coefficient two-by-two of the three-phase leakage current vector is calculated according to three-phase Leakage Current vector；
The arrester is diagnosed according to the cross-correlation coefficient two-by-two.
3. arrester diagnostic method according to claim 2, it is characterised in that according to the three-phase Leakage Current to gauge
Calculating the cross-correlation coefficient two-by-two of the three-phase leakage current vector includes：
The cross-correlation coefficient two-by-two is obtained by equation below：
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<mi>X</mi>
<mi>B</mi>
</mrow>
</msub>
</msub>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>r</mi>
<mrow>
<mi>B</mi>
<mi>C</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mi>cov</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>B</mi>
</mrow>
</msub>
<mo>,</mo>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>C</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>&sigma;</mi>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>B</mi>
</mrow>
</msub>
</msub>
<msub>
<mi>&sigma;</mi>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>C</mi>
</mrow>
</msub>
</msub>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>r</mi>
<mrow>
<mi>C</mi>
<mi>A</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mi>cov</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>C</mi>
</mrow>
</msub>
<mo>,</mo>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>A</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>&sigma;</mi>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>C</mi>
</mrow>
</msub>
</msub>
<msub>
<mi>&sigma;</mi>
<msub>
<mi>I</mi>
<mrow>
<mi>X</mi>
<mi>A</mi>
</mrow>
</msub>
</msub>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein：rABFor the coefficient correlation of A, B two-phase arrester in the three-phase lightning protector；rBCFor B, C in the three-phase lightning protector
The coefficient correlation of two-phase arrester；rCAFor the coefficient correlation of C, A two-phase arrester in the three-phase lightning protector；IXAFor described three
A phases Leakage Current vector in phase leakage current vector；IXBFor B phases Leakage Current vector in the three-phase leakage current vector；IXC
For C phases Leakage Current vector in the three-phase leakage current vector；Cov is expressed as inner product of vectors；Electricity is revealed for the A phases
Flow vector length；For the B phases Leakage Current vector length；For the C phases Leakage Current vector length.
4. arrester diagnostic method according to claim 3, it is characterised in that according to the cross-correlation coefficient two-by-two to institute
Stating arrester and carrying out diagnosis includes：
In rABLess than first threshold, rCALess than Second Threshold, rBCDuring more than three threshold values, diagnosis A phases arrester is abnormal；
In rABLess than the 4th threshold value, rBCLess than the 5th threshold value, rCADuring more than six threshold values, diagnosis B phases arrester is abnormal；
In rBCLess than the 7th threshold value, rCALess than the 8th threshold value, rABDuring more than nine threshold values, diagnosis C phases arrester is abnormal.
5. arrester diagnostic method according to claim 1, it is characterised in that the three-phase detection parameter includes each phase
Leakage Current, the angle between the reference voltage of each phase and the Leakage Current and reference voltage of each phase, according to institute
Stating the three-phase leakage current vector of the three-phase detection parameter calculating three-phase lightning protector includes：
According to the resistive fundamental current component of each phase arrester of three-phase detection parameter calculating three-phase lightning protector, resistive three
Subharmonic current component and capacitive fundamental current component；
According to the resistive fundamental current component, resistive triple harmonic current component and capacitive fundamental current of each phase arrester
Component calculates the leakage current vector of each phase arrester of three-phase lightning protector.
6. according to any described arrester diagnostic methods of claim 1-5, it is characterised in that according to the three-phase leakage current
Vector diagnoses to the arrester, in addition to：
Show the diagnostic result.
7. arrester diagnostic method according to claim 6, it is characterised in that the diagnostic result is included by described in two-by-two
Cross-correlation coefficient is described when cross-correlation coefficient is all higher than the predetermined threshold two-by-two compared with predetermined threshold, the three-phase
Arrester running status is good.
A kind of 8. arrester diagnostic device, it is characterised in that including：
Receiving module, for receiving same position three-phase lightning protector three-phase detection parameter；
Vector module, for calculating the three-phase leakage current vector of the three-phase lightning protector according to the three-phase detection parameter；
Diagnostic module, for being diagnosed according to the three-phase leakage current vector to the arrester.
9. arrester diagnostic device according to claim 8, it is characterised in that the vector module includes：
First processing module, the resistive base of each phase arrester for calculating three-phase lightning protector according to the three-phase detection parameter
Ripple current component, resistive triple harmonic current component and capacitive fundamental current component；
Second processing module, for resistive fundamental current component, the resistive triple harmonic current according to each phase arrester
Component and capacitive fundamental current component calculate the leakage current vector of each phase arrester of three-phase lightning protector.
10. arrester diagnostic device according to claim 8, it is characterised in that the diagnostic module includes：
3rd processing module, for calculating the mutual two-by-two of the three-phase leakage current vector according to three-phase Leakage Current vector
Coefficient correlation；
Comparison module, for cross-correlation coefficient to diagnose to the arrester two-by-two according to.
11. arrester diagnostic device according to claim 10, it is characterised in that the diagnostic module also includes：
Display module, for showing the diagnostic result.
A kind of 12. terminal, it is characterised in that including：At least one processor；And connect with least one processor communication
The memory connect；Wherein, the memory storage have can by the instruction of one computing device, the instruction by it is described extremely
A few computing device, so that any described method at least one computing device the claims 1-7.
13. a kind of computer-readable recording medium, is stored thereon with computer instruction, it is characterised in that the instruction is by processor
The step of any methods described in the claims 1-7 is realized during execution.
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| CN107632223B (en) | 2020-04-24 |
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