CN108008247A - Distribution net work earthing fault localization method and device - Google Patents
Distribution net work earthing fault localization method and device Download PDFInfo
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- CN108008247A CN108008247A CN201711203427.1A CN201711203427A CN108008247A CN 108008247 A CN108008247 A CN 108008247A CN 201711203427 A CN201711203427 A CN 201711203427A CN 108008247 A CN108008247 A CN 108008247A
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The invention discloses a kind of distribution net work earthing fault localization method and device.Wherein, this method includes：The electrical parameter at least one circuit in preset time period that receiving circuit monitoring terminal is sent；In the case where at least one circuit includes first line, according to the related coefficient between the different electrical parameters of first line, and/or, the related coefficient between first line and the same electrical parameter of other circuits determines whether first line occurs earth fault；Judge whether every circuit occurs earth fault at least one circuit respectively.The present invention solves the technical problem that distribution net work earthing fault localization method is not accurate enough in correlation technique.
Description
Technical field
The present invention relates to field of distribution network, in particular to a kind of distribution net work earthing fault localization method and device.
Background technology
Under the small current neutral grounding method of operation, due to short circuit current flow very little, power distribution network can operate with failure 2 it is small when.But will
When ground path is run as regular link, earth fault production overvoltage and earth current, may cause cable/switchgear/
The serious accidents such as Ferroresonance Damage in Systems, people and animals' electric shock, have greatly threatened the safety in production of power grid.With power electronics skill
The fast development of art, network transmission technology, disk storage technology, high frequency sampling, the wave-record chart of distribution terminal go up the hero of biography in real time
The engineering practice stood is possibly realized.
In the prior art, the method generally use following manner of line fault is detected：
The feature of temporary stable state, gives various faulty line detection algorithms after being occurred based on singlephase earth fault.
1. it is based on steady state characteristic --- zero-sequence current colony amplitude comparison phase comparing method
Zero-sequence current comparison is first carried out, the larger conduct candidate of several amplitudes is selected, then carries out phase on this basis
Compare；If certain line direction is different from other circuits, it is faulty line；If all zero-sequence current same-phases,
For bus device.This method is used by most of line selection apparatus.This method can only detect non-momentary earth fault, be only applicable to
Isolated neutral system is big by transition Resistance Influence.
2. it is based on steady state characteristic --- zero sequence reactive power direction method
Using 90 ° of isolated neutral system faulty line zero-sequence current delayed phase residual voltage, and sound circuit surpasses
First 90 ° the characteristics of, select reactive power be less than zero (circuit->Busbar) circuit be faulty line.This method is also more traditional
Method, Europe application it is relatively broad.This method and the essence of " zero-sequence current colony amplitude comparison phase comparing method ", it is only applicable to
Isolated neutral system, and it is big by transition Resistance Influence.
3. it is based on transient characteristic --- zero sequence reactive power direction method
Calculate feeder line line outlet, the direction of transient reactive power Q, Q in the transient signal duration<0 shows that transient state is idle
Power flow direction busbar, is faulty line.
4. it is based on transient characteristic --- electric current similitude
Feeder line line outlet is calculated, the relative coefficient of transient current between synchronization difference circuit.Related coefficient approaches
It is faulty line in 0.This method route selection can be used in stable state and transient current, and this method is also applied for the positioning of trouble point.
But singlephase earth fault process is complicated, intermittence ground connection duration, arc suppression coil compensation degree, transition electricity
The factors such as resistance have a great influence the size and Orientation of fault current, frequently result in above-mentioned a certain detection technique failure.
, can not big face usually due to project cost reason, power electronic equipment resonance reason in Practical Project work progress
Long-pending installation zero-sequence current CT and residual voltage PT devices, causes above-mentioned a certain algorithm to fail.The single-phase of bootstrapping property does not connect
Earth fault detection algorithm, it is desirable to the artwork data of maintenance line in phase-to-ground fault detection system, therefore in engineer application
In be not easy to carry out persistence maintenance.Singlephase earth fault process is complicated, intermittence ground connection duration, arc suppression coil compensation journey
The factors such as degree, transition resistance, communication interference have a great influence the size and Orientation of fault current, are usually led only with single algorithm
Cause single-phase earth fault line selection failure.
For the technical problem that distribution net work earthing fault localization method in correlation technique is not accurate enough, not yet propose have at present
The solution of effect.
The content of the invention
An embodiment of the present invention provides a kind of distribution net work earthing fault localization method and device, at least to solve correlation technique
The not accurate enough technical problem of middle distribution net work earthing fault localization method.
One side according to embodiments of the present invention, there is provided a kind of distribution net work earthing fault localization method, this method bag
Include：The electrical parameter at least one circuit in preset time period that receiving circuit monitoring terminal is sent；In at least one circuit
In the case of including first line, according to the related coefficient between the different electrical parameters of first line, and/or, first line with
Related coefficient between the same electrical parameter of other circuits determines whether first line occurs earth fault；At least one is judged respectively
Whether every circuit occurs earth fault in bar circuit.
Further, the electrical parameter bag at least one circuit in preset time period that receiving circuit monitoring terminal is sent
Include：The earth-fault signal that receiving circuit monitoring terminal is sent；After earth-fault signal is received, to path monitoring terminal
Send data read command；In response to what data read command was fed back is occurring for receiving circuit monitoring terminal the time of earth fault
The electrical parameter of preset time range near point.
Further, determine whether first line connects according to the related coefficient between the different electrical parameters of first line
Earth fault includes：Calculate the related coefficient between the jump-value of current of the out of phase of first line；Judge first line not
Whether the related coefficient between the jump-value of current of same-phase is more than the first predetermined threshold value；First line is determined according to judging result
Whether earth fault is occurred.
Further, determine whether first line connects according to the related coefficient between the different electrical parameters of first line
Earth fault includes：Calculate the related coefficient between the zero-sequence current and residual voltage of first line；Judge the zero sequence of first line
Whether the related coefficient between electric current and residual voltage is more than the first predetermined threshold value；Whether first line is determined according to judging result
Generation earth fault.
Further, in the case where at least one circuit further includes the second circuit, according to first line and other circuits
Same electrical parameter between related coefficient determine whether first line occurs earth fault and include：Calculate the zero sequence of first line
The related coefficient of the zero-sequence current of electric current and the second circuit, and/or, the phase between the in-phase current of first line and the second circuit
Relation number, and/or, the related coefficient between the DC component of the DC component of first line and the second circuit；On judging respectively
Whether the related coefficient stated exceedes corresponding predetermined threshold value；Determine whether first line occurs earth fault according to judging result.
Another aspect according to embodiments of the present invention, additionally provides a kind of distribution net work earthing fault positioner, the device
Including：Receiving module, the electrical parameter of at least one circuit in preset time period sent for receiving circuit monitoring terminal；
Determining module, in the case of including first line at least one circuit, according between the different electrical parameters of first line
Related coefficient, and/or, whether the related coefficient between first line and the same electrical parameter of other circuits determines first line
Generation earth fault；Judgment module, for judging whether every circuit occurs earth fault at least one circuit respectively.
Further, receiving module includes：First receiving submodule, the ground connection event sent for receiving circuit monitoring terminal
Hinder signal；Sending submodule, for after earth-fault signal is received, sending digital independent to path monitoring terminal and referring to
Order；Second receiving submodule, is occurring earth fault for receiving circuit monitoring terminal in response to what data read command was fed back
Time point near preset time range electrical parameter.
Further, it is determined that module includes：First calculating sub module, the electric current of the out of phase for calculating first line
Related coefficient between Sudden Changing Rate；First judging submodule, for judge first line out of phase jump-value of current it
Between related coefficient whether more than the first predetermined threshold value；First determination sub-module, for determining first line according to judging result
Whether earth fault is occurred.
Further, it is determined that module includes：Second calculating sub module, for calculating the zero-sequence current and zero sequence of first line
Related coefficient between voltage；Second judgment submodule, for judge first line zero-sequence current and residual voltage it
Between related coefficient whether more than the first predetermined threshold value；Second determination sub-module, for determining first line according to judging result
Whether earth fault is occurred.
Further, in the case where at least one circuit further includes the second circuit, determining module includes：3rd calculates son
Module, for calculating the related coefficient of the zero-sequence current of first line and the zero-sequence current of the second circuit, and/or, first line
And second circuit in-phase current between related coefficient, and/or, the direct current of the DC component of first line and the second circuit point
Related coefficient between amount；3rd judging submodule, for judging it is corresponding default whether above-mentioned related coefficient exceedes respectively
Threshold value；3rd determination sub-module, for determining whether first line occurs earth fault according to judging result.
In embodiments of the present invention, at least one line in preset time period sent by receiving circuit monitoring terminal
The electrical parameter on road；In the case where at least one circuit includes first line, according between the different electrical parameters of first line
Related coefficient, and/or, the related coefficient between first line and the same electrical parameter of other circuits determines whether first line is sent out
Raw earth fault；Judge that whether every circuit occurs earth fault at least one circuit, solves in correlation technique and matches somebody with somebody respectively
The not accurate enough technical problem of power grid Earth design method, and then realize can be more accurately to distribution net work earthing fault
The technique effect positioned.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of optional distribution net work earthing fault localization method according to embodiments of the present invention；
Fig. 2 is the flow chart of the optional distribution net work earthing fault localization method of another kind according to embodiments of the present invention；
Fig. 3 is a kind of schematic diagram of optional distribution net work earthing fault positioner according to embodiments of the present invention.
Embodiment
In order to make those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Attached drawing, is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without making creative work, should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to the embodiment of the present invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
This application provides a kind of embodiment of distribution net work earthing fault localization method.
Fig. 1 is a kind of flow chart of optional distribution net work earthing fault localization method according to embodiments of the present invention, such as Fig. 1
Shown, this method comprises the following steps：
Step S101, the electrical parameter at least one circuit in preset time period that receiving circuit monitoring terminal is sent；
Step S102, in the case where at least one circuit includes first line, according to the different electrical parameters of first line
Between related coefficient, and/or, the related coefficient between first line and the same electrical parameter of other circuits determines first line
Whether earth fault is occurred；
Step S103, judges whether every circuit occurs earth fault at least one circuit respectively.
In the scheme that step S101 is provided, receive that at least one path monitoring terminal sends in preset time period
The electrical parameter of at least one circuit, wherein, each path monitoring terminal is arranged on a circuit, and every circuit is provided with least
One path monitoring terminal.Each path monitoring terminal can monitor the electrical parameter of corresponding segment on the circuit of setting,
In addition, the electrical parameter that each path monitoring terminal is monitored can include electrical parameters, for example, electric current, voltage etc..
After electrical parameter is received by step S101, if path monitoring terminal can monitor electrical parameters,
It can judge whether the circuit breaks down by the dependency relation between every circuit different electrical parameters of itself.If step
The electrical parameter that rapid S101 is received includes the electrical parameter of a plurality of circuit, then according between the same electrical parameter per two lines road
Dependency relation is to determine whether break down.And then judge whether every circuit at least one circuit is grounded respectively
Failure.
Optionally, by taking first line (any one circuit at least one circuit) as an example, in circuit monitoring terminal energy
, can be according to first line in the case of enough monitoring the electrical parameter of electrical parameters and the electrical parameter received including a plurality of circuit
Different electrical parameters between related coefficient, and/or, the related coefficient between first line and the same electrical parameter of other circuits
To determine whether first line occurs earth fault.
As step S101 provide scheme a kind of optional embodiment, receiving circuit monitoring terminal send pre-
If the step of electrical parameter of at least one circuit in the period, includes：The earth fault letter that receiving circuit monitoring terminal is sent
Number；After earth-fault signal is received, data read command is sent to path monitoring terminal；Receiving circuit monitoring terminal is rung
Should be in the electrical parameter for the preset time range near the time point that earth fault occurs that data read command is fed back.
As step S102 provide scheme a kind of optional embodiment, according to the different electrical parameters of first line it
Between related coefficient determine that the step of whether first line occurs earth fault includes：Calculate the electricity of the out of phase of first line
Flow the related coefficient between Sudden Changing Rate；Judge whether the related coefficient between the jump-value of current of the out of phase of first line surpasses
Cross the first predetermined threshold value；Determine whether first line occurs earth fault according to judging result.
As another optional embodiment of the step S102 schemes provided, according to the different electrical parameters of first line
Between related coefficient determine that the step of whether first line occurs earth fault includes：Calculate first line zero-sequence current and
Related coefficient between residual voltage；Judge whether the related coefficient between the zero-sequence current of first line and residual voltage exceedes
First predetermined threshold value；Determine whether first line occurs earth fault according to judging result.
As another optional embodiment of the step S102 schemes provided, second is further included at least one circuit
In the case of circuit, whether first line is determined according to the related coefficient between first line and the same electrical parameter of other circuits
The step of generation earth fault, includes：The related coefficient of the zero-sequence current of first line and the zero-sequence current of the second circuit is calculated,
And/or the related coefficient between the in-phase current of first line and the second circuit, and/or, the DC component of first line and
Related coefficient between the DC component of two circuits；Judge whether above-mentioned related coefficient exceedes corresponding predetermined threshold value respectively；
Determine whether first line occurs earth fault according to judging result.
The electricity ginseng at least one circuit in preset time period that the embodiment is sent by receiving circuit monitoring terminal
Number；In the case where at least one circuit includes first line, according to the related coefficient between the different electrical parameters of first line,
And/or the related coefficient between first line and the same electrical parameter of other circuits determines whether first line occurs ground connection event
Barrier；Judge whether every circuit occurs earth fault at least one circuit respectively, solve power distribution network in correlation technique and be grounded
The not accurate enough technical problem of Fault Locating Method, and then realize and more accurately distribution net work earthing fault can be positioned
Technique effect.
With reference to the embodiment of Fig. 2 another distribution net work earthing fault localization method provided the application, such as Fig. 2 institutes
Show, which includes the following steps that the embodiment can be that following steps are realized in a manner of software, it is necessary to illustrate：
Step 1：Collect fault recorder data, artwork data.
(1) calculating based on residual voltage Yu zero-sequence current Waveform Correlation
The zero-sequence current (electrical parameter) of every 10kV outlet and mother under the main transformer on topological island where calculating singlephase earth fault
The related coefficient of residual voltage (electrical parameter) derivative measured on lineThe derivative of residual voltage uses 2 detections
Change rate between point (k moment and k+1 moment) calculates.The relative coefficient illustrates that the circuit more tends to perfect closer to 1
Circuit；And relative coefficient closer -1, illustrate that the circuit more tends to faulty line.
The defined formula that the computational methods of related coefficient can use for reference following related coefficient is calculated：
The ρ of above formulaxyFor related coefficient, x and y are the dependent variables of independent variable time t, although time t need to take infinitely in above formula
Still set up in limited long data window when growing, but correlation analysis is done to definite signal.Discretization is carried out to above formula, is obtained as follows
Formula：
Wherein, -1≤ρ≤1.If ρ=1, there are positive linear relationships between two amounts；If ρ=- 1, there are negative wire between two amounts
Sexual intercourse；It is completely uncorrelated between two amounts if ρ=0.It is generally considered that：ρ<0.3, without correlation；0.3≤ρ<0.5, it is low
It is related；0.5≤ρ<0.8, moderate is related；0.8≤ρ<1, height correlation.
The calculating of (2) circuit out-of-phase current Waveform Correlations
A, in B, C three-phase current, the correlation coefficient ρ (i of the current waveform per two-phase is calculatedA,iB)、ρ(iA,iC)、ρ(iB,
iC).Take related coefficient of the minimum value as this circuit in three related coefficients.The relative coefficient illustrates the circuit closer to 1
More tend to sound circuit；And relative coefficient closer -1, illustrate that the circuit more tends to faulty line.
(3) calculating of two lines road zero-sequence current Waveform Correlation
A certain outlet m under optional busbar is reference line, calculates the zero sequence of circuit m and other circuits under the busbar successively
Correlation coefficient ρ (the i of current waveform0m,i0n).If all of related coefficient all close -1 (i.e.>- 0.85), illustrate that circuit m inclines
To for faulty line；If all of related coefficient all close to 1 (i.e.>0.85), illustrate that the busbar tends to faulty line；If
Only the related coefficient of circuit k approaches -1 (i.e.>- 0.85), illustrate that circuit k tendencies are faulty line.
(4) calculating of two lines road in-phase current Waveform Correlation
A certain outlet m under optional busbar is reference line, calculates the A phases of circuit m and other circuits under the busbar successively
Correlation coefficient ρ (the i of electric current/alternate in-phase current waveforms of B phase currents/CAm,iAn)、ρ(iBm,iBn)、ρ(iCm,iCn).Make 2 lines
Correlation coefficient ρ between roadmn=min (ρ (iAm,iAn),ρ(iBm,iBn),ρ(iCm,iCn)).If all of correlation coefficient ρmnAll
Close to -1 (i.e.>- 0.85), illustrate that circuit m tendencies are faulty line；If all of correlation coefficient ρmnAll close to 1 (i.e.>
0.85), illustrate that the busbar tends to faulty line；If the only correlation coefficient ρ of circuit kmkClose to -1 (i.e.>- 0.85), explanation
Circuit k tendencies are faulty line.
(5) DC component characteristic value is extracted
To the current recording data of collection, data are used after occurring using failure in 1 cycle, busbar is calculated using following formula
With the DC component I of every circuit zero-sequence currentDC：
Wherein
Select 3 maximum IDC, by descending order IDC,j、IDC,k、IDC,m。
If IDC,j>IDC,k+IDC,m, then it is assumed that circuit j tendencies are faulty line.This method is only sent out in voltage over zero
Raw failure, faulty line and zero sequence transient current on non-fault line it is too small can not route selection when, just supplemented and judged using this method.
Step 2：The algorithm provided according to above-mentioned steps 1, calculates the related coefficient of every circuit, forms correlation matrix
ρ={ ρk,1,ρk,2,ρk,3,ρk,4}K=1, N.Wherein, busbar is circuit 0.
Step 3：Related coefficient is corrected, in correlation matrix, the related coefficient for correcting low related coefficient is 0, wherein,
| ρ |≤0.3 represents uncorrelated or low correlation, may be considered that caused by being due to interference signal, therefore to the phase of this scope
Relation number, is uniformly modified to 0.
Step 4：The negatively correlated maximum circuit of selection.I.e.：Calculate the minimum value of each method related coefficient, i.e. ρmin,1=
min(ρk,1)K=1, N、ρmin,2=min (ρk,2)K=1, N、ρmin,3=min (ρk,3)K=1, N、ρmin,4=min (ρk,4)K=1, N.If institute
Methodical least correlativing coefficient is all<=-0.85, and all point to same circuit j, then judge that circuit j is faulty line.Algorithm
Terminate, be otherwise transferred to step 5.
Step 5：If the methodical least correlativing coefficient of institute is all<=-0.85, but be directed toward a plurality of circuit, then calculated
Method fusion treatment.These circuits are formed a subset, then calculate the related coefficient standard deviation peace of every circuit in subset
Mean, the circuit of standard deviation minimum are determined as faulty line；If standard deviation is the same, the circuit for being averaged minimum is determined as event
Hinder circuit (standard deviation is small, and it is faulty line to illustrate that each algorithm tends to this circuit).
For example, the least correlativing coefficient of this three-line of i, j, m<This three-line, then formed a son by=- 0.85
Collection.Four algorithm related coefficients of circuit i are respectively ρi,1、ρi,2、ρi,3、ρi,4, calculate this 4 related coefficients standard deviation peace
Mean.Calculating the standard deviation and average of circuit j and circuit m respectively.The circuit for taking standard deviation minimum is faulty line.If
All, then the circuit for being averaged minimum is faulty line to the standard deviation for having 2 or 3 circuits.If not all methods
Least correlativing coefficient all<=-0.85, then turn to step 6.
Step 6：If the only least correlativing coefficient of Part Methods<=-0.85, then this Part Methods form a son
The content of collection, repeat step 4 and step 5.Otherwise, least correlativing coefficient method composition all between (- 0.85, -05) is selected
Collection, is carrying out the Multi-source Information Fusion processing of similar step 5.The average and standard deviation of every circuit in subset are calculated first,
Then the three-line of standard deviation minimum is selected, the circuit that average minimum is selected from this three-line is faulty line.Otherwise,
Turn to step 7.
Step 7：5 calculate the DC component DC component of every circuit, judge faulty line.
Step 8：If the above method can not all filter out faulty line, route selection failure.
Step 9：If route selection success, fault section location is carried out according to the related coefficient of section both sides electric current.
Above-described embodiment employs the Waveform Correlation analytical technology based on failure wave-recording, takes into full account that Practical Project is constructed
During terminal current transformer (CT), the configuring condition of voltage transformer (PT), the time error situation of terminal, using more
Kind characteristic component carries out the correlation comprehensive analysis of recording waveform, realizes the route selection of various singlephase earth faults in Complicated Distribution Network
With positioning.
Waveform Correlation algorithm based on multiple characteristic components, it is accurate with positioning to improve single-phase earth fault line selection
Property.The embodiment carries out the various fault characteristic values of different measurement points in power distribution network fusion treatment, comprehensive each selection method
The fault characteristic value extracted carries out route selection, can effectively eliminate the influence of interference, improves small current grounding fault processing
Precision and robustness.
Specifically, the distribution net work earthing fault localization method which provides at least has following technique effect：
(1) compared by split-phase, the technology of three-phase current synthesis zero-sequence current so that this software is suitable for one on circuit
The configuring condition of phase/two-phase/three-phase CT, identifies the similarity of recorder data, carries out the route selection and positioning of singlephase earth fault.
(2) when carrying out current waveform similarity-rough set, used current data had both included transient current data or had wrapped
Steady-state current data are included, and employ DC filtering technology；When progress wave-form similarity compares, the ripple of three-phase current has been carried out
Shape similarity measure, zero-sequence current wave-form similarity calculate, DC current similarity measure.
(3) polyalgorithm result is merged using probabilistic algorithm, realized under the different ground connection methods of operation, complicated distribution
The single-phase earth fault line selection of net and positioning.
It should be noted that attached drawing flow chart though it is shown that logical order, but in some cases, can be with
Shown or described step is performed different from order herein.
Present invention also provides a kind of embodiment of storage medium, the storage medium of the embodiment includes the program of storage,
Wherein, equipment performs the distribution net work earthing fault positioning side of the embodiment of the present invention where controlling storage medium when program is run
Method.
Present invention also provides a kind of embodiment of processor, the processor of the embodiment is used for operation program, wherein, journey
The distribution net work earthing fault localization method of the embodiment of the present invention is performed during sort run.
Present invention also provides a kind of embodiment of distribution net work earthing fault positioner.
Fig. 3 is a kind of schematic diagram of optional distribution net work earthing fault positioner according to embodiments of the present invention, such as Fig. 3
Shown, which includes receiving module 10, determining module 20 and judgment module 30.Wherein, receiving module is supervised for receiving circuit
Survey the electrical parameter at least one circuit in preset time period that terminal is sent；Determining module is used at least one circuit bag
Include according to the related coefficient between the different electrical parameters of first line in the case of first line, and/or, first line with it is other
Related coefficient between the same electrical parameter of circuit determines whether first line occurs earth fault；Judgment module is used to sentence respectively
Whether every circuit occurs earth fault in disconnected at least one circuit.
At least one line in preset time period that the embodiment is sent by receiving module receiving circuit monitoring terminal
The electrical parameter on road, by determining module in the case where at least one circuit includes first line, according to the difference of first line
Related coefficient between electrical parameter, and/or, by determining module in the case where at least one circuit includes first line, the
Related coefficient between one circuit and the same electrical parameter of other circuits determines whether first line occurs earth fault, by sentencing
Disconnected module judges that whether every circuit occurs earth fault at least one circuit, solves power distribution network in correlation technique and connects respectively
The not accurate enough technical problem of earth fault localization method, and then realize and more accurately distribution net work earthing fault can be determined
The technique effect of position.
Further, receiving module includes：First receiving submodule, the ground connection event sent for receiving circuit monitoring terminal
Hinder signal；Sending submodule, for after earth-fault signal is received, sending digital independent to path monitoring terminal and referring to
Order；Second receiving submodule, is occurring earth fault for receiving circuit monitoring terminal in response to what data read command was fed back
Time point near preset time range electrical parameter.
As an alternative embodiment, determining module includes：First calculating sub module, for calculating first line
Related coefficient between the jump-value of current of out of phase；First judging submodule, for judging the out of phase of first line
Jump-value of current between related coefficient whether more than the first predetermined threshold value；First determination sub-module, for being tied according to judgement
Fruit determines whether first line occurs earth fault.
As an alternative embodiment, determining module includes：Second calculating sub module, for calculating first line
Related coefficient between zero-sequence current and residual voltage；Second judgment submodule, for judging the zero sequence electricity of first line
Whether the related coefficient between stream and residual voltage is more than the first predetermined threshold value；Second determination sub-module, for being tied according to judgement
Fruit determines whether first line occurs earth fault.
As an alternative embodiment, in the case where at least one circuit further includes the second circuit, determining module
Including：3rd calculating sub module, for calculating the related coefficient of the zero-sequence current of first line and the zero-sequence current of the second circuit,
And/or the related coefficient between the in-phase current of first line and the second circuit, and/or, the DC component of first line and
Related coefficient between the DC component of two circuits；3rd judging submodule, for whether judging above-mentioned related coefficient respectively
More than corresponding predetermined threshold value；3rd determination sub-module, for determining whether first line occurs ground connection event according to judging result
Barrier.
Above-mentioned device can include processor and memory, and said units can be stored in storage as program unit
In device, above procedure unit stored in memory is performed by processor to realize corresponding function.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the form such as Nonvolatile memory, such as read-only storage (ROM) or flash memory (flash RAM), memory includes at least one deposit
Store up chip.
The order of above-mentioned the embodiment of the present application does not represent the quality of embodiment.
In above-described embodiment of the application, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, may refer to the associated description of other embodiment.In several embodiments provided herein, it should be appreciated that
Arrive, disclosed technology contents, can realize by another way.
Wherein, device embodiment described above is only schematical, such as the division of the unit, can be one
Kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Another system is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed it is mutual it
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, the technical solution of the application is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
Embody, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment the method for the application whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
- A kind of 1. distribution net work earthing fault localization method, it is characterised in that including：The electrical parameter at least one circuit in preset time period that receiving circuit monitoring terminal is sent；In the case where at least one circuit includes first line, according between the different electrical parameters of the first line Related coefficient, and/or, the related coefficient between the first line and the same electrical parameter of other circuits determines the First Line Whether road occurs earth fault；Judge whether every circuit occurs the earth fault at least one circuit respectively.
- 2. according to the method described in claim 1, it is characterized in that, receiving circuit monitoring terminal send in preset time period The electrical parameter of at least one circuit include：Receive the earth-fault signal that the path monitoring terminal is sent；After the earth-fault signal is received, data read command is sent to the path monitoring terminal；It is attached in the time point in generation earth fault that the data read command is fed back to receive the path monitoring terminal response The electrical parameter of near preset time range.
- 3. according to the method described in claim 1, it is characterized in that, according to the phase between the different electrical parameters of the first line Relation number determines whether the first line occurs earth fault and include：Calculate the related coefficient between the jump-value of current of the out of phase of the first line；Judge the related coefficient between the jump-value of current of the out of phase of the first line whether more than the first predetermined threshold value；Determine whether the first line occurs the earth fault according to judging result.
- 4. according to the method described in claim 1, it is characterized in that, according to the phase between the different electrical parameters of the first line Relation number determines whether the first line occurs earth fault and include：Calculate the related coefficient between the zero-sequence current and residual voltage of the first line；Judge the related coefficient between the zero-sequence current and residual voltage of the first line whether more than the first predetermined threshold value；Determine whether the first line occurs the earth fault according to judging result.
- 5. according to the method described in claim 1, it is characterized in that, further include the feelings of the second circuit at least one circuit Under condition, whether the first line is determined according to the related coefficient between the first line and the same electrical parameter of other circuits Generation earth fault includes：The related coefficient of the zero-sequence current of the first line and the zero-sequence current of second circuit is calculated, and/or, described Related coefficient between the in-phase current of one circuit and second circuit, and/or, the DC component of the first line and institute State the related coefficient between the DC component of the second circuit；Judge whether above-mentioned related coefficient exceedes corresponding predetermined threshold value respectively；Determine whether the first line occurs earth fault according to judging result.
- A kind of 6. distribution net work earthing fault positioner, it is characterised in that including：Receiving module, the electrical parameter of at least one circuit in preset time period sent for receiving circuit monitoring terminal；Determining module, in the case of including first line at least one circuit, according to the first line not With the related coefficient between electrical parameter, and/or, the related coefficient between the first line and the same electrical parameter of other circuits Determine whether the first line occurs earth fault；Judgment module, for judging whether every circuit occurs the earth fault at least one circuit respectively.
- 7. device according to claim 6, it is characterised in that the receiving module includes：First receiving submodule, the earth-fault signal sent for receiving the path monitoring terminal；Sending submodule, for after the earth-fault signal is received, sending data to the path monitoring terminal and reading Instruction fetch；Second receiving submodule, is occurring for receiving the path monitoring terminal response in what the data read command was fed back The electrical parameter of preset time range near the time point of earth fault.
- 8. device according to claim 6, it is characterised in that the determining module includes：First calculating sub module, for the related coefficient between the jump-value of current for the out of phase for calculating the first line；First judging submodule, for judge the first line out of phase jump-value of current between related coefficient be It is no more than the first predetermined threshold value；First determination sub-module, for determining whether the first line occurs the earth fault according to judging result.
- 9. device according to claim 6, it is characterised in that the determining module includes：Second calculating sub module, the related coefficient between zero-sequence current and residual voltage for calculating the first line；Second judgment submodule, the related coefficient between zero-sequence current and residual voltage for judging the first line Whether more than the first predetermined threshold value；Second determination sub-module, for determining whether the first line occurs the earth fault according to judging result.
- 10. device according to claim 6, it is characterised in that further include the second circuit at least one circuit In the case of, the determining module includes：3rd calculating sub module, for calculating the phase of the zero-sequence current of the first line and the zero-sequence current of second circuit Relation number, and/or, the related coefficient between the in-phase current of the first line and second circuit, and/or, described Related coefficient between the DC component of one circuit and the DC component of second circuit；3rd judging submodule, for judging whether above-mentioned related coefficient exceedes corresponding predetermined threshold value respectively；3rd determination sub-module, for determining whether the first line occurs earth fault according to judging result.
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| CN109917228A (en) * | 2019-03-28 | 2019-06-21 | 国网上海市电力公司 | A kind of traveling wave method distribution net work earthing fault localization method based on RBF neural |
| CN110118912A (en) * | 2019-04-23 | 2019-08-13 | 武汉理工大学 | It is a kind of that wire selection method for power distribution network single phase earthing failure is grounded through arc suppression coil device based on grey correlation analysis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108663602A (en) * | 2018-05-14 | 2018-10-16 | 山东大学 | Flexible direct current power distribution network monopole failure line selection and Section Location and system |
| CN109541394A (en) * | 2018-11-21 | 2019-03-29 | 杭州电力设备制造有限公司 | A kind of method for locating single-phase ground fault of active distribution network, apparatus and system |
| CN109917228A (en) * | 2019-03-28 | 2019-06-21 | 国网上海市电力公司 | A kind of traveling wave method distribution net work earthing fault localization method based on RBF neural |
| CN110118912B (en) * | 2019-04-23 | 2022-02-01 | 武汉理工大学 | Grey correlation analysis-based single-phase earth fault line selection method for arc suppression coil device-grounded power distribution network |
| CN110118912A (en) * | 2019-04-23 | 2019-08-13 | 武汉理工大学 | It is a kind of that wire selection method for power distribution network single phase earthing failure is grounded through arc suppression coil device based on grey correlation analysis |
| CN110133371A (en) * | 2019-04-26 | 2019-08-16 | 青岛鼎信通讯股份有限公司 | A kind of power grid resonance point detecting method based on constant pressure source converter |
| CN110688699A (en) * | 2019-09-25 | 2020-01-14 | 西南交通大学 | Method for constructing passing split-phase train-bridge coupling model on viaduct of long-grouping motor train unit |
| CN110688699B (en) * | 2019-09-25 | 2023-08-22 | 西南交通大学 | Method for constructing coupling model of bridge of over-phase separation on viaduct of long-marshalling motor train unit |
| CN110988740A (en) * | 2019-12-19 | 2020-04-10 | 广东电网有限责任公司 | Single-phase earth fault detection method suitable for neutral point small-resistance earth distribution network |
| CN110988740B (en) * | 2019-12-19 | 2022-03-01 | 广东电网有限责任公司 | Single-phase earth fault detection method suitable for neutral point small-resistance earth distribution network |
| CN111999605A (en) * | 2020-09-16 | 2020-11-27 | 珠海许继芝电网自动化有限公司 | Power distribution network fault tolerance judgment method and device based on fault correlation analysis |
| CN111999605B (en) * | 2020-09-16 | 2023-11-07 | 珠海许继芝电网自动化有限公司 | Power distribution network fault tolerance judging method and device based on fault correlation analysis |
| CN114089092A (en) * | 2021-10-12 | 2022-02-25 | 许昌许继软件技术有限公司 | Line fault discrimination method and device based on grounding line selection zero sequence power |
| CN114414944A (en) * | 2022-01-26 | 2022-04-29 | 上海道博电气有限公司 | Low-current grounding device based on phase current transient method and detection method |
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