CN109599827A - Power network neutral point dynamic earth fault method and system based on big data - Google Patents
Power network neutral point dynamic earth fault method and system based on big data Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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Abstract
本发明提供一种基于大数据的配电网中性点动态接地方法及系统，其中，该方法包括：获取配电网中故障线路的故障点的工作参数；将所述故障点的工作参数输入故障类型判断模型，以通过所述故障类型判断模型输出所述故障线路的故障类型；为所述配电网的中性点选择所述故障类型对应的接地方式，以对所述配电网的故障进行处理。通过本发明的技术方案，动态切换中性点的接地方式，根据不同的故障类型在消弧线圈接地方式和小电阻接地方式间切换，以适应配电网的实际应用需求。
The present invention provides a method and system for dynamic grounding of a neutral point of a distribution network based on big data, wherein the method includes: acquiring working parameters of a fault point of a faulty line in the distribution network; inputting the working parameters of the fault point The fault type judgment model is used to output the fault type of the fault line through the fault type judgment model; Troubleshoot. Through the technical scheme of the present invention, the grounding mode of the neutral point is dynamically switched, and the grounding mode of the arc suppression coil and the small resistance grounding mode are switched according to different fault types, so as to meet the practical application requirements of the power distribution network.
Description
[technical field]
The present invention relates to technical field of electric power more particularly to a kind of power network neutral point dynamic earth fault sides based on big data
Method and system.
[background technique]
In current electric system, the earthing mode of neutral point is directly related to the exhausted of power supply reliability, route and equipment
Edge level, single-phase short circuit current are to the degree of injury of equipment, the function of protective relaying device and to communication system, personal safety
Influence.
In general, 35kV and the distribution network of following voltage class mainly use grounding through arc side to neutral point
Low resistance grounding mode can be used in formula, urban electricity supply network.Wherein, grounding through arc mode can to fault point capacitor electricity
Stream compensates, and makes fault point insulation recovery, and power system restoration is normal, however, this earthing mode can only be with singlephase earth fault
Operation a period of time, for permanent singlephase earth fault, it can not thoroughly realize Failure elimination.And low resistance grounding mode then may be used
Faulty circuit is directly cut off, permanent singlephase earth fault can be eliminated, however, route trip-out rate under low resistance grounding mode
Height, power supply reliability are poor.
Therefore, so that the earthing mode of neutral point is can adapt to the practical application request of power distribution network, become at present urgently
The technical issues of solution.
[summary of the invention]
The embodiment of the invention provides it is a kind of by the power network neutral point dynamic earth fault method and system of big data and based on
Calculation machine readable storage medium storing program for executing, it is intended to which the neutral grounding mode solved in the related technology is unable to satisfy power distribution network practical application need
The technical issues of asking enables power distribution network according to big data training to select grounding through arc mode or low resistance grounding side
Formula improves the validity of troubleshooting.
In a first aspect, the embodiment of the invention provides a kind of power network neutral point dynamic earth fault methods, comprising: obtain distribution
The running parameter of the fault point of faulty line in net；By the running parameter input fault type judgment models of the fault point, with
The fault type of the faulty line is exported by the fault type judgment models；Institute is selected for the neutral point of the power distribution network
The corresponding earthing mode of fault type is stated, is handled with the failure to the power distribution network.
In the above embodiment of the present invention, optionally, the fault type includes transient single-phase earth fault and permanent
Property singlephase earth fault.
In the above embodiment of the present invention, optionally, the work of the fault point of faulty line in the acquisition power distribution network
Before the step of parameter, further includes: the history running parameter of acquisition historical failure point and corresponding historical failure type；It will be described
The history running parameter of historical failure point is as input, using the corresponding historical failure type as output, training institute
State fault type judgment models.
In the above embodiment of the present invention, optionally, the running parameter of the fault point includes: the electricity of the fault point
Stream, the voltage of the fault point, the current duration of the fault point and the fault point voltage-duration.
In the above embodiment of the present invention, optionally, the neutral point for the power distribution network selects the fault type
The step of corresponding earthing mode, specifically includes: in the case where the fault type is the transient single-phase earth fault,
Grounding through arc mode is selected for the neutral point of the power distribution network；It is the permanent single-phase earthing event in the fault type
It is that the neutral point of the power distribution network selects low resistance grounding mode in the case where barrier.
Second aspect, the power network neutral point dynamic earth fault system based on big data that the embodiment of the invention provides a kind of,
It include: running parameter acquiring unit, for obtaining the running parameter of the fault point of faulty line in power distribution network；Fault type output
Unit, for judging mould to pass through the fault type for the running parameter input fault type judgment models of the fault point
Type exports the fault type of the faulty line；Earthing mode selecting unit, for selecting institute for the neutral point of the power distribution network
The corresponding earthing mode of fault type is stated, is handled with the failure to the power distribution network.
In the above embodiment of the present invention, optionally, the fault type includes transient single-phase earth fault and permanent
Property singlephase earth fault.
In the above embodiment of the present invention, optionally, further includes: historical data acquiring unit, for joining in the work
Before number acquiring units the step of obtaining the running parameter of the fault point, the history running parameter of historical failure point and right is obtained
The historical failure type answered；Model training unit, for using the history running parameter of the historical failure point as input,
Using the corresponding historical failure type as output, the training fault type judgment models.
In the above embodiment of the present invention, optionally, the running parameter of the fault point includes: the electricity of the fault point
Stream, the voltage of the fault point, the current duration of the fault point and the fault point voltage-duration.
In the above embodiment of the present invention, optionally, the earthing mode selecting unit is used for: being in the fault type
It is that the neutral point of the power distribution network selects grounding through arc mode in the case where the transient single-phase earth fault；Institute
It is that the neutral point of the power distribution network selects low resistance grounding in the case where fault type is stated as the permanent singlephase earth fault
Mode.
By above technical scheme, power distribution network practical application is unable to satisfy for property point earthing mode in the related technology
The technical issues of demand, can enable power distribution network according to big data training selection grounding through arc mode or low resistance grounding side
Formula.
Specifically, the running parameter of the fault point of faulty line in power distribution network can be obtained by modes such as real-time monitorings,
The running parameter include but is not limited to the electric current of the fault point, the voltage of the fault point, the fault point electric current continue
These running parameters can then be inputted the fault type that pre-training obtains by the voltage-duration of time and the fault point
Judgment models.Fault type judgment models are using the running parameter of a large amount of historical failure point as input, with a large amount of history
The corresponding fault type of the running parameter of fault point is obtained as output training, thus its running parameter for embodying fault point with
Dependence between fault type.Therefore, the running parameter of current fault point is inputted into the fault type that this pre-training obtains
Judgment models, it will be able to which the work of current fault point is obtained by the dependence between the running parameter and fault type of fault point
Make the fault type that parameter should belong to.
The fault type includes transient single-phase earth fault and permanent singlephase earth fault, every kind of fault type pair
There should be the processing mode of itself.Wherein, transient single-phase earth fault can be carried out by the grounding through arc mode of neutral point
Reason, the fault residual current after arc suppression coil compensation are less than power grid blow-out critical value, can promote arc extinction, make fault recovery
Power supply, provides the reaction time for fault restoration.Generally, after grounding through arc mode is handled, power distribution network can connect with single-phase
Earth fault is run 2 hours.And permanent singlephase earth fault can then be handled by low resistance grounding mode, when single-phase earthing event
When barrier occurs, using low resistance grounding mode, faulty line can be cut off by zero-sequenceprotection.
By above technical scheme, can switching at runtime neutral point earthing mode, can select to be suitable for it is actual therefore
The neutral grounding mode for hindering type, takes full advantage of the advantage of grounding through arc mode and low resistance grounding mode, so that
When power distribution network occur transient single-phase earth fault when, can quick blow-out, restore failure point insulating quickly, and reduce distribution
Net lightning stroke probability of sustained arc and trip-out rate, increase substantially distribution network reliability, but also when power distribution network generation is permanent single-phase
When ground fault, it can accurately select and cut off faulty circuit, damage when avoiding failure to power distribution network relevant device reduces
Operation cost improves efficiency of economic operations.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 shows the stream of the power network neutral point dynamic earth fault method based on big data of one embodiment of the present of invention
Cheng Tu；
Fig. 2 shows the power network neutral point dynamic earth fault methods based on big data of another embodiment of the invention
Flow chart；
Fig. 3 shows the frame of the power network neutral point dynamic earth fault system based on big data of one embodiment of the present of invention
Figure；
Fig. 4 shows the block diagram of the distribution system of one embodiment of the present of invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
Fig. 1 shows the stream of the power network neutral point dynamic earth fault method based on big data of one embodiment of the present of invention
Cheng Tu.
As shown in Figure 1, the power network neutral point dynamic earth fault method based on big data of one embodiment of the present of invention
Process includes:
Step 102, the running parameter of the fault point of faulty line in power distribution network is obtained.
The running parameter of the fault point of faulty line in power distribution network is obtained by modes such as real-time monitorings, the running parameter packet
Include but be not limited to the electric current of the fault point, the voltage of the fault point, the current duration of the fault point and the event
Hinder the voltage-duration of point.
Step 104, by the running parameter input fault type judgment models of the fault point, to pass through the fault type
Judgment models export the fault type of the faulty line.
These running parameters can be inputted the fault type judgment models that pre-training obtains.Fault type judgment models be with
The running parameter of a large amount of historical failure point is as input, with the corresponding fault type of running parameter of a large amount of historical failure point
It is obtained as output training, therefore it embodies the dependence between the running parameter of fault point and fault type.Therefore, will work as
The running parameter of preceding fault point inputs the fault type judgment models that this pre-training obtains, it will be able to pass through the work of fault point
Dependence between parameter and fault type obtains the fault type that the running parameter of current fault point should belong to.
Step 106, the corresponding earthing mode of the fault type is selected for the neutral point of the power distribution network, to match to described
The failure of power grid is handled.
The fault type includes transient single-phase earth fault and permanent singlephase earth fault, every kind of fault type pair
There should be the processing mode of itself.Wherein, transient single-phase earth fault can be carried out by the grounding through arc mode of neutral point
Reason, the fault residual current after arc suppression coil compensation are less than power grid blow-out critical value, can promote arc extinction, make fault recovery
Power supply, provides the reaction time for fault restoration.Generally, after grounding through arc mode is handled, power distribution network can connect with single-phase
Earth fault is run 2 hours.And permanent singlephase earth fault can then be handled by low resistance grounding mode, when single-phase earthing event
When barrier occurs, using low resistance grounding mode, faulty line can be cut off by zero-sequenceprotection.
Therefore, above technical scheme, can switching at runtime neutral point earthing mode, can select be suitable for it is actual therefore
The neutral grounding mode for hindering type, takes full advantage of the advantage of grounding through arc mode and low resistance grounding mode, so that
When power distribution network occur transient single-phase earth fault when, can quick blow-out, restore failure point insulating quickly, and reduce distribution
Net lightning stroke probability of sustained arc and trip-out rate, increase substantially distribution network reliability, but also when power distribution network generation is permanent single-phase
When ground fault, it can accurately select and cut off faulty circuit, damage when avoiding failure to power distribution network relevant device reduces
Operation cost improves efficiency of economic operations.
Fig. 2 shows the power network neutral point dynamic earth fault methods based on big data of another embodiment of the invention
Flow chart.
As shown in Fig. 2, the power network neutral point dynamic earth fault method based on big data of another embodiment of the invention
Process include:
Step 202, the history running parameter of acquisition historical failure point and corresponding historical failure type.
Step 204, using the history running parameter of the historical failure point as input, by the corresponding history event
Hinder type as output, training fault type judgment models.
Fault type judgment models are using the running parameter of a large amount of historical failure point as input, with a large amount of history event
The corresponding fault type of running parameter of barrier point is obtained as output training, therefore its running parameter for embodying fault point and event
Hinder the dependence between type.Therefore, the running parameter of current fault point the fault type that this pre-training obtains is inputted to sentence
Disconnected model, it will be able to which the work of current fault point is obtained by the dependence between the running parameter and fault type of fault point
The fault type that parameter should belong to.
Step 206, the running parameter of the fault point of faulty line in power distribution network is obtained.
Step 208, by the running parameter input fault type judgment models of the fault point, to pass through the fault type
Judgment models export the fault type of the faulty line.
It step 210, is the power distribution network in the case where the fault type is the transient single-phase earth fault
Neutral point selects grounding through arc mode, in the case where the fault type is the permanent singlephase earth fault, is
The neutral point of the power distribution network selects low resistance grounding mode.
In the related art, using the power distribution network of grounding through arc mode, transient single-phase earth fault can only be eliminated,
And permanent singlephase earth fault can not be eliminated, if insulator, end puncture, insulated conductor breakage caused by lightning stroke simultaneously lands, when having
When contacting personal safety accident can occur for people.And the power distribution network of low resistance grounding mode is used to work as singlephase earth fault
When, faulty line is cut off by zero-sequenceprotection, but just because of partial circuit has been cut off, power supply reliability is reduced, caused
Trip-out rate increases, also, low resistance grounding mode increases the electric current of fault point due to being, if failure generation is being opened
Accident can be expanded by closing cabinet and cable branch box, the fault current of increase, cause fire, generate safety accident.It is led in overhead insulating
When line broken string ground connection, due to there is no earthing or grounding means in wired earth point, if the exposed length of insulated conductor is small, fault point soil electricity
It is unreliable that resistance rate height or conducting wire are contacted with the earth, then the impedance ground between conducting wire and the earth is just higher, then flows through fault point
Current in resistance property is small, and makes zero-sequenceprotection failure and there are security risks.
Therefore, for step 210, transient single-phase earth fault is encountered, is just disappeared for the neutral point selection of the power distribution network
Arc coil earthing mode encounters permanent singlephase earth fault, just selects low resistance grounding side for the neutral point of the power distribution network
Formula, that is, or, can switching at runtime neutral point earthing mode, take full advantage of grounding through arc mode and low resistance grounding
The advantage of mode so that when power distribution network occur transient single-phase earth fault when, can quick blow-out, keep failure point insulating quick
Restore, and reduce power distribution network lightning stroke probability of sustained arc and trip-out rate, distribution network reliability is increased substantially, but also working as power distribution network
When permanent singlephase earth fault occurs, it can accurately select and cut off faulty circuit, power distribution network correlation is set when avoiding failure
Standby damage, reduces operation cost, improves efficiency of economic operations.
Fig. 3 shows the frame of the power network neutral point dynamic earth fault system based on big data of one embodiment of the present of invention
Figure.
As shown in figure 3, the power network neutral point dynamic earth fault system based on big data of one embodiment of the present of invention
300, comprising: running parameter acquiring unit 302, for obtaining the running parameter of the fault point of faulty line in power distribution network；Failure
Type output unit 304, for by the running parameter input fault type judgment models of the fault point, to pass through the failure
Type judgment models export the fault type of the faulty line；Earthing mode selecting unit 306, for for the power distribution network
Neutral point selects the corresponding earthing mode of the fault type, is handled with the failure to the power distribution network.
The power network neutral point dynamic earth fault system 300 based on big data using Fig. 1 and Fig. 2 shows embodiment in appoint
Therefore scheme described in one has above-mentioned all technical effects, details are not described herein.Power distribution network based on big data is neutral
Point dynamic earthed system 300 also has following technical characteristic:
In the above embodiment of the present invention, optionally, the fault type includes transient single-phase earth fault and permanent
Property singlephase earth fault.
In the above embodiment of the present invention, optionally, further includes: historical data acquiring unit, for joining in the work
Before the step of number acquiring unit 302 obtains the running parameter of the fault point, the history running parameter of historical failure point is obtained
With corresponding historical failure type；Model training unit, for using the history running parameter of the historical failure point as
Input, using the corresponding historical failure type as output, the training fault type judgment models.
In the above embodiment of the present invention, optionally, the running parameter of the fault point includes: the electricity of the fault point
Stream, the voltage of the fault point, the current duration of the fault point and the fault point voltage-duration.
In the above embodiment of the present invention, optionally, the earthing mode selecting unit 306 is used for: in the failure classes
It is that the neutral point of the power distribution network selects grounding through arc mode in the case that type is the transient single-phase earth fault；
It is that the neutral point of the power distribution network selects small resistance in the case where the fault type is the permanent singlephase earth fault
Earthing mode.
Fig. 4 shows the block diagram of the distribution system of one embodiment of the present of invention.
As shown in figure 4, the distribution system 400 of one embodiment of the present of invention, including at least one processor 402；And
With the processor 404 of at least one processor 402 communication connection；Wherein, the memory be stored with can by it is described at least
The instruction that one processor 404 executes, described instruction are arranged to be used for executing any one of above-mentioned Fig. 1 and Fig. 2 embodiment institute
The scheme stated.Therefore, which has and the identical technical effect of any one of Fig. 1 and Fig. 2 embodiment, herein not
It repeats again.
In addition, computer executable instructions are stored with the embodiment of the invention provides a kind of computer readable storage medium,
The computer executable instructions are for executing method flow described in any one of above-mentioned Fig. 1 and Fig. 2 embodiment.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, according to the technical solution of the present invention, it can dynamically cut
The earthing mode of neutral point is changed, the neutral grounding mode suitable for actual fault type can be selected, taken full advantage of
The advantage of grounding through arc mode and low resistance grounding mode, so that when transient single-phase earth fault occurs for power distribution network,
Can quick blow-out, restore failure point insulating quickly, and reduce power distribution network lightning stroke probability of sustained arc and trip-out rate, increase substantially and match
Power grid power supply reliability, but also can accurately select when permanent singlephase earth fault occurs for power distribution network and cut off failure electricity
Road, damage when avoiding failure to power distribution network relevant device, reduces operation cost, improves efficiency of economic operations.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
In several embodiments provided by the present invention, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
It is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present invention
The part steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. it is various
It can store the medium of program code.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111123087A (en) * | 2019-12-24 | 2020-05-08 | 深圳供电局有限公司 | Power distribution network switching equipment fault detection method and device and computer equipment |
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