CN106019100A - Cable aging degree detection method and device - Google Patents
Cable aging degree detection method and device Download PDFInfo
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- CN106019100A CN106019100A CN201610466094.0A CN201610466094A CN106019100A CN 106019100 A CN106019100 A CN 106019100A CN 201610466094 A CN201610466094 A CN 201610466094A CN 106019100 A CN106019100 A CN 106019100A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention discloses a cable aging degree detection method and a device. The method comprises steps that a depolarization current generated in a discharging process of a fully-charged offline cable is detected; calculation of the depolarization current is carried out according to a preset algorithm to acquire an aging index; an aging degree of the offline cable is determined according to the aging index. Through the method, a problem that an aging degree of the cable can not be accurately reflected through a cable insulation performance detection method in the prior art can be solved.
Description
Technical field
The present invention relates to detection field, in particular to detection method and the device of a kind of cable degree of aging.
Background technology
Cable in power system is acted on by the factor such as electric, hot, mechanical, chemical in During Process of Long-term Operation, meeting
Progressively accumulating aging effect, degree of aging is the highest, and the insulating properties of cable are the poorest.This process be extremely slowly and
Irreversible, easily neglect in the daily operation of power system and maintenance, if insulating performance of cable is the poorest, easily make
Become the malicious influences such as massive blackout accident.Accordingly, it would be desirable to the degree of aging of cable is monitored.Existing detection
The detection method of cable degree of aging mainly judges the aging journey of cable by the way of detection insulating performance of cable
Degree, detection insulating performance of cable is divided into on-line checking means and offline inspection means.
On-line checking means rely primarily on and gather on cable the change of all kinds of weak currents to monitor the change of insulating performance of cable
Change, but in practical engineering application, owing to electric current is fainter, bigger doing often occurs in the weak current collected
Disturb, cause the situation of false alarm frequently to occur.
Offline inspection means need to have a power failure, when therefore significantly can weaken test compared to on-line checking means when test
Interference, test result is more accurate.Existing frequently-used offline inspection means mainly have two kinds, and one is pressure test inspection
Survey means, another kind is insulation resistance and dielectric loss tangent value test detection means.Pressure test is a kind of destructive testing,
The insulating properties of cable body can be caused damage by detection process.Insulation resistance and the test of dielectric loss tangent value are currently electric power
The detection means that system is the most frequently used, but this test mode test result is single, and it is limited by the capacitance of cable, as
Really the capacitance of cable is not in default range of capacity, not accurate enough to the measurement result of the insulating properties of cable, it is impossible to
The degree of aging of accurate response cable.
For can not the asking of degree of aging of accurate response cable to the detection means of insulating performance of cable in correlation technique
Topic, the most not yet proposes effective solution.
Summary of the invention
Present invention is primarily targeted at detection method and the device that a kind of cable degree of aging is provided, to solve relevant skill
Can not the problem of degree of aging of accurate response cable to the detection means of insulating performance of cable in art.
To achieve these goals, according to an aspect of the invention, it is provided the detection side of a kind of cable degree of aging
Method.The method includes: detect the depolarization current that fully charged off-line cable produces in discharge process；According in advance
Imputation method performs calculating to depolarization current, obtains Ageing Index；And judge the old of off-line cable according to Ageing Index
Change degree.
Further, before detecting the depolarization current that fully charged off-line cable produces in discharge process, should
Method also comprises determining that the length of off-line cable；Length according to off-line cable determines charging duration, wherein, charging
Duration is the time span that off-line cable performs charging；Off-line cable is performed charging, wherein, perform charging time
A length of charging duration determined, detects the depolarization current that fully charged off-line cable produces in discharge process and includes:
Off-line cable is performed electric discharge.
Further, before detecting the depolarization current that fully charged off-line cable produces in discharge process, should
Method also includes: off-line cable is performed anti-tampering process, and wherein, anti-tampering process is used for preventing and off-line cable phase
Adjacent cable produces charge inducing to off-line cable.
Further, according to preset algorithm, depolarization current is performed calculating, obtain Ageing Index and comprise determining that default
Model of fit and parameter to be determined, wherein, parameter to be determined is to preset parameter to be determined in model of fit；According in advance
If model of fit performs matching to obtain the value of parameter to be determined to depolarization current；And according to parameter to be determined
Value determines Ageing Index.
Further, parameter to be determined includes material mixed polarization parameter and chain rupture polarization parameter, and wherein, material mixes
Dependency relation, chain rupture polarization parameter and off-line cable is there is in polarization parameter with the material mixed polarization degree of off-line cable
There is dependency relation in chain rupture degree of polarization, according to default model of fit, depolarization current is performed matching to be determined to obtain
The value of parameter includes: according to default model of fit, depolarization current is performed matching to obtain material mixed polarization parameter
Value and the value of chain rupture polarization parameter, determine that Ageing Index includes according to the value of parameter to be determined: to material mix
The value of the value and chain rupture polarization parameter of closing polarization parameter seeks ratio, obtains the first Ageing Index, wherein, aging finger
Mark includes the first Ageing Index.
Further, according to preset algorithm, depolarization current is performed calculating, obtain Ageing Index and include: to depolarization
Electric current performs integration, obtains the second Ageing Index, and wherein, Ageing Index includes the second Ageing Index.
Further, according to preset algorithm, depolarization current is being performed calculating, after obtaining Ageing Index, the method
Also include: judge whether Ageing Index exceedes predetermined threshold value；And if it is judged that Ageing Index exceedes predetermined threshold value,
Send alarm.
Further, Ageing Index includes multiple Ageing Index, it is judged that whether Ageing Index exceedes predetermined threshold value includes:
Judge whether multiple Ageing Index exceedes the predetermined threshold value of correspondence, wherein, multiple Ageing Indexes and multiple default thresholds respectively
Value one_to_one corresponding, wherein, after judging the predetermined threshold value whether multiple Ageing Index exceedes correspondence respectively, the method
Also include: if it is judged that multiple Ageing Index is all not less than corresponding predetermined threshold value, then according to default weight model pair
Multiple Ageing Indexes perform calculating, obtain weight index.
To achieve these goals, according to an aspect of the invention, it is provided the detection of a kind of cable degree of aging fills
Put.This device includes: detector unit, goes to pole for detect that fully charged off-line cable produces in discharge process
Galvanic current；Computing unit, for depolarization current being performed calculating according to preset algorithm, obtains Ageing Index；And
Judging unit, for judging the degree of aging of off-line cable according to Ageing Index.
Further, this device also includes: first determines unit, for determining the length of off-line cable；Second determines
Unit, determines charging duration with according to the length of off-line cable, and wherein, charging duration is that off-line cable is performed charging
Time span；Charhing unit, for off-line cable is performed charging, wherein, execution charge time a length of determine
Charging duration, detector unit includes: discharge module, for off-line cable is performed electric discharge.
The present invention is by detecting the depolarization current that fully charged off-line cable produces in discharge process；According to presetting
Algorithm performs calculating to depolarization current, obtains Ageing Index；And judge the aging of off-line cable according to Ageing Index
Degree, solving can not the degree of aging of accurate response cable to the detection means of insulating performance of cable in correlation technique
Problem, and then reached the effect of the degree of aging of accurate response cable.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the detection method of cable degree of aging according to embodiments of the present invention；
Fig. 2 is the schematic diagram of cable measuring method according to embodiments of the present invention；
Fig. 3 is the schematic diagram of depolarization current according to embodiments of the present invention and time Relationship；And
Fig. 4 is the schematic diagram of the detection device of cable degree of aging according to embodiments of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with in the embodiment of the present application
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present application, it is clear that described embodiment
It is only the embodiment of the application part rather than whole embodiments.Based on the embodiment in the application, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise, all should belong to
The scope of the application protection.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that this
The data that sample uses can be exchanged in the appropriate case, in order to embodiments herein described herein.Additionally, term
" include " and " having " and their any deformation, it is intended that cover non-exclusive comprising, such as, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed
Rapid or unit, but can include that the most clearly list or intrinsic for these processes, method, product or equipment
Other step or unit.
The embodiment provides the detection method of a kind of cable degree of aging.
Fig. 1 is the flow chart of the detection method of cable degree of aging according to embodiments of the present invention.As it is shown in figure 1, should
Method comprises the following steps:
Step S101, detects the depolarization current that fully charged off-line cable produces in discharge process.
The method that this embodiment provides judges the degree of aging of off-line cable by the depolarization current of detection cable, goes
Current of polarization is the electric current that discharge process produces, accordingly, it would be desirable to perform the discharge process of fully charged off-line cable
Detection.Off-line cable increases along with the increase of length, fully charged required linearly, and the cable of off-line is filling
After dividing charging, can detect, by sensor, the depolarization electricity that fully charged off-line cable produces in discharge process
Stream.
Step S102, performs calculating according to preset algorithm to depolarization current, obtains Ageing Index.
After detecting the depolarization current of charging process, according to the preset algorithm time dependent depolarization to record
Electric current performs calculating, obtains the Ageing Index that may be used for judging off-line cable degree of aging.Come by depolarization current
The principle obtaining can be used in judging the Ageing Index of cable degree of aging is owing to cable is in aging different phase, goes
The time dependent curve of current of polarization is different, and specifically, those skilled in the art can be by doing the side tested
Formula determines the relation between depolarization current and degree of aging.Preset algorithm can be conventional fitting algorithm, by choosing
Selecting the model with undetermined parameter, undetermined parameter includes Ageing Index, depolarization current can be performed matching, obtain
The matched curve of depolarization current, and determine that the occurrence of undetermined parameter is to determine Ageing Index.
Step S103, judges the degree of aging of off-line cable according to Ageing Index.
After obtaining Ageing Index, judge the degree of aging of off-line cable according to Ageing Index.Ageing Index and off-line
Between the degree of aging of cable, there is dependency relation, off-line electricity can be judged qualitatively by the occurrence of Ageing Index
The degree of aging of cable, or described to characterize the degree of aging of off-line cable the use time of off-line cable the most quantitatively.
The detection method of the cable degree of aging that this embodiment provides, the off-line cable fully charged by detection is discharging
During produce depolarization current；According to preset algorithm, depolarization current is performed calculating, obtain Ageing Index；With
And the degree of aging of off-line cable is judged according to Ageing Index, solve the detection to insulating performance of cable in correlation technique
Means can not the problem of degree of aging of accurate response cable, and then reached the effect of the degree of aging of accurate response cable
Really.
Before detecting the depolarization current that fully charged off-line cable produces in discharge process, it is also possible to off-line
Cable perform fully charged.First, determine the length of off-line cable, secondly, determine according to the length of off-line cable
Charging duration, wherein, charging duration is the time span that off-line cable performs charging, finally, holds off-line cable
Row charging, and perform time a length of charging duration determined of charging.Detect fully charged off-line cable discharging
The depolarization current produced in journey includes off-line cable is performed electric discharge, and the process at off-line cable discharge detects depolarization
Electric current.
Preferably, before detecting the depolarization current that fully charged off-line cable produces in discharge process, the party
Method can also include off-line cable is performed anti-tampering process, and wherein, anti-tampering process is used for preventing and off-line cable phase
Adjacent cable produces charge inducing to off-line cable.
Fig. 2 is the schematic diagram of cable measuring method according to embodiments of the present invention.As in figure 2 it is shown, fully fill in detection
Before the depolarization current that the off-line cable 80 of electricity produces in discharge process, first off-line cable 80 is performed anti-tampering
Processing, arrange anti-bucking current module 40, concrete operating procedure is as follows: it is possible, firstly, to first clamping off-line cable 80,
It is wound around copper strips at the two ends of off-line cable 80, secondly, between the contact surface of copper strips and off-line cable 80, arranges one layer
Insulating barrier, such as, bonding one layer of epoxide-resin glue.Then by anti-bucking current module 40 and ground and connect, prevent around
Cable this off-line cable 80 is produced charge inducing, it is also possible to prevent core to surface Leakage Current affect measure.
Anti-bucking current module 40 and ground the loop connect are in series with high voltage power supply 60 and polarization/depolarizing switch 70.Polarization
First end of/depolarizing switch 70 is connected with off-line cable 80, and the second end is connected with anti-bucking current module 40,
3rd end is connected with the positive pole of high voltage power supply 60.Measurement apparatus 50 is used for measuring the depolarization current of off-line cable 80,
First end of measurement apparatus 50 is connected with off-line cable 80, and the second end is connected with anti-bucking current module 40.When
Need off-line cable 80 is performed polarization, namely during charging, the first end and the 3rd end of polarization/depolarizing switch 70 close
Closing, off-line cable 80 is charged by high voltage power supply 60；After fully charged to off-line cable 80, need off-line electricity
Cable 80 performs depolarization, namely during electric discharge, the first end of polarization/depolarizing switch 70 and the second end Guan Bi, perform
Polarization, wherein, measurement apparatus 50 measures depolarization current at the process of depolarization of off-line cable 80.
Before fully charged to the execution of off-line cable, the length of off-line cable can be measured, determine charging according to length
Duration.Owing to cable is the most linearly increasing along with length increases capacitance, therefore, different length charging durations is different.
As a example by the XLPE cable of 3*300, the time of every kilometer of cable charging is 1800 seconds, with apart from linearly increasing.?
After charging reaches the charging duration determined, remove the voltage of charging, measure depolarization current.
According to preset algorithm, depolarization current being performed calculating, obtaining Ageing Index can be first to determine default model of fit
With parameter to be determined, wherein, parameter to be determined is to preset parameter to be determined in model of fit, intends then according to preset
Matched moulds type performs the matching value with acquisition parameter to be determined to depolarization current, finally according to the value of parameter to be determined
Determine Ageing Index.
Ageing Index can be one or more.Alternatively, parameter to be determined includes material mixed polarization parameter and chain rupture
Polarization parameter, wherein, there is dependency relation with the material mixed polarization degree of off-line cable in material mixed polarization parameter,
Dependency relation is there is, according to default model of fit to depolarization in chain rupture polarization parameter with the chain rupture degree of polarization of off-line cable
It can be, according to default model of fit, depolarization current is performed plan that electric current performs matching to obtain the value of parameter to be determined
Closing the value to obtain material mixed polarization parameter and the value of chain rupture polarization parameter, the value according to parameter to be determined is true
Determine the value that Ageing Index can be the value to material mixed polarization parameter and chain rupture polarization parameter and seek ratio, obtain
One Ageing Index, wherein, Ageing Index includes the first Ageing Index.Alternatively, according to preset algorithm to depolarization electricity
Stream performs calculating, obtains Ageing Index and includes: to depolarization current execution integration, obtain the second Ageing Index, wherein,
Ageing Index includes the second Ageing Index.
As the above-mentioned preferred implementation obtaining Ageing Index, concrete step may is that
Step one, performs three natural Exponents equation models according to Debye model and trap parameters.
As it is shown on figure 3, the actual measured results of the depolarization current of off-line cable can be by certain interference, especially
After electric discharge a period of time, depolarization current is less, and the measurement result of depolarization current is affected more by experienced interference
Greatly, fluctuation in time is more violent.In order to remove interference, obtain the relation of depolarization current and time, can be to going
Current of polarization be fitted process, matched curve is smoother compared with primitive curve, more can state depolarization current and time
Relation between.
According to the different principle that then time is different of depolarizing type, body polarization region, XLPE covalent bond are ruptured polarization
Region, other atom or material mixed polarization region separate, and the relation of depolarization current I with time t are passed through
Formula 1 performs matching:
In formula, αiRepresenting fitting coefficient, this formula includes the fitting coefficient of three types.τ1For body polarization region
Fit time constant, τ2The fit time constant of polairzed area, τ is ruptured for XLPE covalent bond3For other atom or thing
The fit time constant in matter mixed polarization region.According to the physical significance of different depolarizing type, between time constant
Magnitude relationship is τ3>τ2>τ1。
Step 2, seeks the first Ageing Index Laging。
Material in ageing process is mixed and two kinds of polarization type of chain rupture can directly ask ratio to represent the old of cable
Change development degree.
Step 3, seeks the second Ageing Index, that is, detrapping charge Q.
In formula, △ l represents the length of off-line cable.
Depolarization current is performed integration, obtains detrapping charge Q.Wherein, detrapping charge Q takes off in the aging early stage of cable
Falling into electric charge to increase with degree of aging and increase, the later stage is owing to captured electric charge is more than newly-increased electric charge, it may appear that decline existing
As, therefore can judge degree of aging by the change of charge Q.
Concrete, detrapping electric charge reflects the quantity of trap in insulant, trap during insulant is aging
Quantity can be gradually increased, and the degree of depth gradually deepens, and these traps can capture electronics at polarization process.Rely on this principle, draw
Enter detrapping charge Q and can express the electronics that in process of depolarization, those are captured, judge degree of aging with this.Consider
Cable length, the present invention performs normalized to it, as shown in Equation 3.
After obtaining Ageing Index, it can be determined that whether Ageing Index exceedes predetermined threshold value, if it is judged that aging finger
Mark exceedes predetermined threshold value, sends alarm.Ageing Index can include multiple Ageing Index, it is judged that Ageing Index is
The no predetermined threshold value that exceedes can include judging the predetermined threshold value whether multiple Ageing Index exceedes correspondence respectively, wherein, many
Individual Ageing Index and multiple predetermined threshold value one_to_one corresponding.Such as, the first Ageing Index L is being obtainedagingWith the second aging finger
After mark Q, can be to LagingCarry out setting up alarm threshold value and normalized with Q, when any one parameter exceedes
It is believed that cable degree of aging exceeds standard during alarm threshold value.
In the ageing process of cable, LagingIt not the most monotonicity change with two criterions of Q, there is extreme point, because of
This can set up alarm threshold value to point out user according to different type of cables when flex point；Utilize two kinds of criterion normalization simultaneously
After process and set up weight, form the comprehensive Aging level evaluation index of the cable feature meeting different model.
After judging the predetermined threshold value whether multiple Ageing Index exceedes correspondence respectively, if it is judged that multiple aging finger
Mark is all not less than corresponding predetermined threshold value, it is also possible to according to default weight model, multiple Ageing Indexes are performed calculating,
To weight index, by weight index, the degree of aging of cable is evaluated.Specifically, weight model is preset permissible
It is a weight equation, multiple Ageing Indexes and multiple weight coefficient one_to_one corresponding, Ageing Index and corresponding weight system
Number is multiplied and is added afterwards, then is normalized, and obtains weight index.
Such as, using the formula 2 provided in above preferred embodiment and formula 3 as evaluating two of cable degree of aging
As a example by Ageing Index, L can be setagingAlarm threshold value be 3, the alarm threshold value arranging Q is 1.1 × 10-8C, Laging
Could be arranged to the weight proportion of Q
Measuring the depolarization current of 7 groups of off-line cables respectively, wherein, 7 groups of off-line cables include in 4 groups of laboratorys
The on-the-spot cable of sample (No. 1 cable, No. 2 cables, No. 3 cables and No. 4 cables) and 3 groups (No. 5 cables, 6
Number cable and No. 7 cables), 4 groups of samples have been carried out burin-in process respectively, temperature is 140 DEG C, and ageing time is respectively
For 10d (my god), 20d, 30d and 40d, in 3 groups of on-the-spot cables, the degree of aging of No. 6 cables is the most serious,
Can be clearly seen that moisture invades after the cable cover(ing) of No. 6 cables of strip off.
After measuring the depolarization current of 7 groups of off-line cables, calculate the Ageing Index L of each group of cable respectivelyagingAnd Q,
Obtain result as follows:
The Ageing Index L of table 1 sampleaging
From table 1 it follows that along with the sample aging time is elongated, degree of aging is the most serious, Ageing Index Laging
Value becomes big, Ageing Index LagingDegree of aging can be characterized.
The Ageing Index L of table 2 on-site cableaging
Aging factor L from table 2agingIt can be seen that No. 2 cables are aging the most serious, this is identical with observed result,
According to Ageing Index LagingResult of calculation show, No. 1 and No. 3 cable degree of agings essentially identical.
The Ageing Index Q of table 3 sample
According to theory analysis, degree of aging the most serious then aging factor Q-value is the biggest, according to table 3, and experimental result
The most substantially reflect this rule.
The Ageing Index Q of table 4 on-site cable
From the point of view of aging factor Q-value, No. 6 cables are aging the most serious, and No. 5 cable situations are preferable, and No. 7 cables
Situation is best, and this is basically identical with the qualitative analysis before.
By above-mentioned experimental result it can be shown that the detection method of the cable degree of aging of embodiment of the present invention offer can
Degree of aging with accurate response cable.
It should be noted that can be at such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing
Computer system performs, and, although show logical order in flow charts, but in some cases, can
With to be different from the step shown or described by order execution herein.
Embodiments of the invention additionally provide the detection device of a kind of cable degree of aging.It should be noted that the present invention
The detection device of the cable degree of aging of embodiment may be used for performing the detection method of the cable degree of aging of the present invention.
Fig. 4 is the schematic diagram of the detection device of cable degree of aging according to embodiments of the present invention.As shown in Figure 4, should
Device includes detector unit 10, computing unit 20 and judging unit 30.
Detector unit 10 is for detecting the depolarization current that fully charged off-line cable produces in discharge process.Calculate
Unit 20, for depolarization current being performed calculating according to preset algorithm, obtains Ageing Index.Judging unit 30 is used for
The degree of aging of off-line cable is judged according to Ageing Index.
The detection device of the cable degree of aging that this embodiment provides, the off-line cable fully charged by detection is discharging
During produce depolarization current；According to preset algorithm, depolarization current is performed calculating, obtain Ageing Index；With
And the degree of aging of off-line cable is judged according to Ageing Index, solve the detection to insulating performance of cable in correlation technique
Means can not the problem of degree of aging of accurate response cable, and then reached the effect of the degree of aging of accurate response cable
Really.
Preferably, this device can also include: first determines unit, for determining the length of off-line cable；Second is true
Cell, determines charging duration with according to the length of off-line cable, and wherein, charging duration is to perform to fill to off-line cable
The time span of electricity；Charhing unit, for off-line cable is performed charging, wherein, execution charge time a length of determine
Charging duration, detector unit 10 includes: discharge module, for off-line cable is performed electric discharge.
Preferably, this device can also include: performance element, for off-line cable being performed anti-tampering process, wherein,
Anti-tampering process produces charge inducing for preventing the cable adjacent with off-line cable to off-line cable.
Computing unit 20 may include that first determines module, is used for determining default model of fit and parameter to be determined, its
In, parameter to be determined is to preset parameter to be determined in model of fit；Fitting module, for according to default model of fit
Depolarization current is performed matching to obtain the value of parameter to be determined；And second determine module, for according to treating really
The value determining parameter determines Ageing Index.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Calculating device realize, they can concentrate on single calculating device, or is distributed in multiple calculating device institute
On the network of composition, alternatively, they can realize with calculating the executable program code of device, it is thus possible to
It is stored in storing in device and is performed by calculating device, or they are fabricated to respectively each integrated circuit die
Block, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention
It is not restricted to any specific hardware and software combine.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the detection method of a cable degree of aging, it is characterised in that including:
Detect the depolarization current that fully charged off-line cable produces in discharge process；
According to preset algorithm, described depolarization current is performed calculating, obtain Ageing Index；And
The degree of aging of described off-line cable is judged according to described Ageing Index.
Method the most according to claim 1, it is characterised in that
Before detecting the depolarization current that fully charged off-line cable produces in discharge process, described method
Also comprise determining that the length of described off-line cable；Length according to described off-line cable determines charging duration, its
In, described charging duration is the time span that described off-line cable performs charging；Described off-line cable is performed
Charging, wherein, performs time a length of charging duration determined of charging,
Detect the depolarization current that fully charged off-line cable produces in discharge process to include: to described off-line
Cable performs electric discharge.
Method the most according to claim 1, it is characterised in that discharging detecting fully charged off-line cable
Before the depolarization current produced in journey, described method also includes:
Described off-line cable is performed anti-tampering process, wherein, described anti-tampering process be used for preventing with described from
The cable that line cable is adjacent produces charge inducing to described off-line cable.
Method the most according to claim 1, it is characterised in that described depolarization current is performed according to preset algorithm
Calculate, obtain Ageing Index and include:
Determining default model of fit and parameter to be determined, wherein, described parameter to be determined is described default matching mould
Parameter to be determined in type；
According to described default model of fit, described depolarization current is performed matching to obtain described parameter to be determined
Value；And
Value according to described parameter to be determined determines described Ageing Index.
Method the most according to claim 4, it is characterised in that described parameter to be determined includes that material mixed polarization is joined
Number and chain rupture polarization parameter, wherein, the material mixing pole of described material mixed polarization parameter and described off-line cable
There is dependency relation in change degree, described chain rupture polarization parameter exists phase with the chain rupture degree of polarization of described off-line cable
Pass relation,
According to described default model of fit, described depolarization current is performed matching to obtain described parameter to be determined
Value includes: according to described default model of fit, described depolarization current is performed matching and mixes to obtain described material
Close value and the value of described chain rupture polarization parameter of polarization parameter,
Value according to described parameter to be determined determines that described Ageing Index includes: join described material mixed polarization
Value and the value of described chain rupture polarization parameter of number seek ratio, obtain the first Ageing Index, wherein, described always
Change index and include described first Ageing Index.
Method the most according to claim 1, it is characterised in that described depolarization current is performed according to preset algorithm
Calculate, obtain Ageing Index and include:
Described depolarization current being performed integration, obtains the second Ageing Index, wherein, described Ageing Index includes
Described second Ageing Index.
Method the most according to claim 1, it is characterised in that described depolarization current is being held according to preset algorithm
Row calculates, and after obtaining Ageing Index, described method also includes:
Judge whether described Ageing Index exceedes predetermined threshold value；And
If it is judged that described Ageing Index exceedes described predetermined threshold value, send alarm.
Method the most according to claim 7, it is characterised in that described Ageing Index includes multiple Ageing Index,
Judge whether described Ageing Index exceedes predetermined threshold value and include: whether judge the plurality of Ageing Index respectively
Exceed the predetermined threshold value of correspondence, wherein, the plurality of Ageing Index and multiple predetermined threshold value one_to_one corresponding,
Wherein, after judging the predetermined threshold value whether the plurality of Ageing Index exceedes correspondence respectively, described side
Method also includes: if it is judged that the plurality of Ageing Index is all not less than corresponding predetermined threshold value, then according to presetting
Weight model performs calculating to the plurality of Ageing Index, obtains weight index.
9. the detection device of a cable degree of aging, it is characterised in that including:
Detector unit, for detecting the depolarization current that fully charged off-line cable produces in discharge process；
Computing unit, for described depolarization current being performed calculating according to preset algorithm, obtains Ageing Index；
And
Judging unit, for judging the degree of aging of described off-line cable according to described Ageing Index.
Device the most according to claim 9, it is characterised in that
Described device also includes: first determines unit, for determining the length of described off-line cable；Second determines
Unit, determines charging duration with according to the length of described off-line cable, and wherein, described charging duration is to described
Off-line cable performs the time span of charging；Charhing unit, for described off-line cable is performed charging, wherein,
Perform time a length of charging duration determined of charging,
Described detector unit includes: discharge module, for described off-line cable is performed electric discharge.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462815A (en) * | 2017-06-26 | 2017-12-12 | 全球能源互联网欧洲研究院 | A kind of cable insulation thermal breakdown voltage determines method and apparatus |
| CN107505542A (en) * | 2017-07-25 | 2017-12-22 | 上海电力学院 | Measuring method based on depolarization current method detection XLPE cable degree of aging |
| CN107576897A (en) * | 2017-08-30 | 2018-01-12 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable insulating burn in test circuit and its method of testing |
| CN108845213A (en) * | 2018-07-11 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | A kind of power transmission line degree of aging appraisal procedure and system |
| CN110346677A (en) * | 2019-07-15 | 2019-10-18 | 国网北京市电力公司 | The determination method and apparatus and aging equipment of state in cable ageing process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10135915B4 (en) * | 2001-07-24 | 2004-12-02 | Wimmershoff, Rudolf, Prof. Dr.-Ing. | Diagnosis of the dielectric aging of multicomponent dielectrics by means of on-site loss factor measurements with frequencies lower than the frequencies of the public, electrical supply networks |
| CN102830309A (en) * | 2012-08-24 | 2012-12-19 | 华南理工大学 | Testing method for aging factor of 110 kV cross-linked cable |
| CN102981108A (en) * | 2012-11-29 | 2013-03-20 | 重庆大学 | Transformer internal insulation aging diagnosis method based on multi-feature information fusion technology |
| CN103197171A (en) * | 2013-03-01 | 2013-07-10 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Evaluation method for paper oil insulation aging state through characteristic parameters based on time domain dielectric response |
| CN105548827A (en) * | 2015-12-04 | 2016-05-04 | 西安交通大学 | Non-destructive method for evaluating aging and operation state of cables |
-
2016
- 2016-06-23 CN CN201610466094.0A patent/CN106019100A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10135915B4 (en) * | 2001-07-24 | 2004-12-02 | Wimmershoff, Rudolf, Prof. Dr.-Ing. | Diagnosis of the dielectric aging of multicomponent dielectrics by means of on-site loss factor measurements with frequencies lower than the frequencies of the public, electrical supply networks |
| CN102830309A (en) * | 2012-08-24 | 2012-12-19 | 华南理工大学 | Testing method for aging factor of 110 kV cross-linked cable |
| CN102981108A (en) * | 2012-11-29 | 2013-03-20 | 重庆大学 | Transformer internal insulation aging diagnosis method based on multi-feature information fusion technology |
| CN103197171A (en) * | 2013-03-01 | 2013-07-10 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Evaluation method for paper oil insulation aging state through characteristic parameters based on time domain dielectric response |
| CN105548827A (en) * | 2015-12-04 | 2016-05-04 | 西安交通大学 | Non-destructive method for evaluating aging and operation state of cables |
Non-Patent Citations (2)
| Title |
|---|
| 杨帆 等: "基于极化/去极化电流法的交联聚乙烯电缆热老化程度判定", 《高电压技术》 * |
| 杨雁 等: "用于评估油纸绝缘热老化状态的极化／去极化电流特征参量", 《高电压技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462815A (en) * | 2017-06-26 | 2017-12-12 | 全球能源互联网欧洲研究院 | A kind of cable insulation thermal breakdown voltage determines method and apparatus |
| CN107462815B (en) * | 2017-06-26 | 2020-02-07 | 全球能源互联网欧洲研究院 | Cable insulation thermal breakdown voltage determining method and device |
| CN107505542A (en) * | 2017-07-25 | 2017-12-22 | 上海电力学院 | Measuring method based on depolarization current method detection XLPE cable degree of aging |
| CN107576897A (en) * | 2017-08-30 | 2018-01-12 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable insulating burn in test circuit and its method of testing |
| CN108845213A (en) * | 2018-07-11 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | A kind of power transmission line degree of aging appraisal procedure and system |
| CN110346677A (en) * | 2019-07-15 | 2019-10-18 | 国网北京市电力公司 | The determination method and apparatus and aging equipment of state in cable ageing process |
| CN110346677B (en) * | 2019-07-15 | 2021-05-07 | 国网北京市电力公司 | Method and device for determining state in cable aging process and aging device |
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