CN108132417A - Method for locating single-phase ground fault and device - Google Patents

Method for locating single-phase ground fault and device Download PDF

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Publication number
CN108132417A
CN108132417A CN201711203602.7A CN201711203602A CN108132417A CN 108132417 A CN108132417 A CN 108132417A CN 201711203602 A CN201711203602 A CN 201711203602A CN 108132417 A CN108132417 A CN 108132417A
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CN
China
Prior art keywords
busbar
outlet
earth fault
phase
electrical parameter
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Pending
Application number
CN201711203602.7A
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Chinese (zh)
Inventor
许冲冲
刘漫雨
王均艳
张艳妍
王宁
吕立平
杨乔
匡军
陈奎阳
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Beijing Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201711203602.7A priority Critical patent/CN108132417A/en
Publication of CN108132417A publication Critical patent/CN108132417A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Abstract

The invention discloses a kind of method for locating single-phase ground fault and devices.Wherein, this method includes:The busbar single-phase earthing signal that receiving circuit monitoring terminal is sent;Obtain electrical parameter Wave data of all outlets with the corresponding busbar of busbar single-phase earthing signal in the first preset duration;Judge whether every outlet occurs earth fault respectively according to electrical parameter Wave data;Show judging result.The present invention is solved in the relevant technologies to the technical issues of method reliability that is positioned of circuit of singlephase earth fault is not high occurs.

Description

Method for locating single-phase ground fault and device
Technical field
The present invention relates to field of distribution network, in particular to a kind of method for locating single-phase ground fault and device.
Background technology
Under the small current neutral grounding method of operation, due to short circuit current very little, power distribution network can operate with failure 2 hours.It 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 Electronic Technique, the fast development of network transmission technology, disk storage technology, the high frequency of distribution terminal is adopted The engineering practice that sample, wave-record chart upload main website in real time is possibly realized.
The judgement of Single-phase Ground Connection Failure is typically necessary the ground connection method of operation, the arc light feelings of earth point with reference to power distribution network Condition, the information such as electric characteristic of earth point upstream and downstream carry out comprehensive descision.Electrical power distribution automatization system main website has powerful calculating Ability, mass storage capacity have complete power distribution network artwork data and real-time running state data, therefore distribution network system main website It is more suitable for from power distribution network global height, high frequency wave-record chart during based on distribution terminal failure, carries out more criterions of many algorithms Fusion carries out wave-record chart correlation parsing, realizes under the different ground connection methods of operation, the singlephase earth fault choosing of Complicated Distribution Network Line and positioning.
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. 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;It is faulty line if certain line direction is different from other circuits;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-instantaneous earth fault, be only applicable to Isolated neutral system is big by transition Resistance Influence.
2. 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. 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. 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 are affected to the size and Orientation of fault current, frequently result in above-mentioned a certain detection technique failure.
It, can not big face usually due to project cost, power electronic equipment resonance reason in Practical Project work progress Long-pending installation zero-sequence current CT and residual voltage PT devices cause above-mentioned a certain algorithm to fail.
For technology not high to the method reliability that is positioned of circuit of singlephase earth fault occurs in the relevant technologies Problem, currently no effective solution has been proposed.
Invention content
An embodiment of the present invention provides a kind of method for locating single-phase ground fault and device, at least to solve in the relevant technologies The technical issues of method reliability that is positioned of circuit to singlephase earth fault occurs is not high.
One side according to embodiments of the present invention, provides a kind of method for locating single-phase ground fault, and this method includes: The busbar single-phase earthing signal that receiving circuit monitoring terminal is sent;Obtain the institute with the corresponding busbar of busbar single-phase earthing signal There is electrical parameter Wave data of the outlet in the first preset duration;Whether every outlet is judged according to electrical parameter Wave data respectively Earth fault occurs;Show judging result.
Further, after the busbar single-phase earthing signal sent in receiving circuit monitoring terminal, this method further includes:Suddenly The busbar single-phase earthing signal slightly received again in the second preset duration for receiving busbar single-phase earthing signal.
Further, all outlets with the corresponding busbar of busbar single-phase earthing signal are obtained in the first preset duration Electrical parameter Wave data include:The electrical parameter waveform number that simultaneously receiving circuit monitoring terminal is sent is waited in the second preset duration According to.
Further, judge whether every outlet occurs earth fault and include respectively according to electrical parameter Wave data:Judge At the end of the second preset duration, whether busbar single-phase earthing signal is in action state;If it is judged that it is yes, it is determined that The type of earth fault is continuous earth failure;If it is judged that it is no, it is determined that the type of earth fault is transient earthing Failure.
Further, in the case where the outlet with the corresponding busbar of busbar single-phase earthing signal includes the first outlet, Judge whether every outlet occurs earth fault and include respectively according to electrical parameter Wave data:According to the difference electricity ginseng of the first outlet Related coefficient between number and/or, the related coefficient between the first outlet and the same electrical parameter of other outlets of corresponding busbar Determine whether the first outlet occurs earth fault.
Another aspect according to embodiments of the present invention additionally provides a kind of single-phase earth fault positioning device, the device packet It includes:First receiving module, the busbar single-phase earthing signal sent for receiving circuit monitoring terminal;Acquisition module, for obtaining Electrical parameter Wave data of all outlets in the first preset duration with the corresponding busbar of busbar single-phase earthing signal;Judge Module, for judging whether every outlet occurs earth fault respectively according to electrical parameter Wave data;Display module, for showing Judging result.
Further, which further includes:Logic module connects for the busbar that is sent in receiving circuit monitoring terminal to be single-phase After earth signal, ignore that the busbar received again in the second preset duration for receiving busbar single-phase earthing signal is single-phase to be connect Earth signal.
Further, acquisition module includes:Second receiving module, for waiting for simultaneously receiving circuit in the second preset duration The electrical parameter Wave data that monitoring terminal is sent.
Further, judgment module includes:Judging submodule, for judging at the end of the second preset duration, busbar list Whether phase ground signalling is in action state;First determination sub-module, for if it is judged that being yes, it is determined that earth fault Type be continuous earth failure;Second determination sub-module, for if it is judged that being no, it is determined that the type of earth fault For transient earthing failure.
Further, in the case where the outlet with the corresponding busbar of busbar single-phase earthing signal includes the first outlet, Judgment module includes:Third determination sub-module, for the related coefficient between the different electrical parameters according to the first outlet and/or, Related coefficient between first outlet and the same electrical parameter of other outlets of corresponding busbar determines whether the first outlet connects Earth fault.
Another aspect according to embodiments of the present invention additionally provides a kind of storage medium, which includes storage Program, wherein, equipment performs the method for locating single-phase ground fault of the present invention where controlling storage medium when program is run.
Another aspect according to embodiments of the present invention additionally provides a kind of processor, which is used to run program, In, method for locating single-phase ground fault of the invention is performed when program is run.
In embodiments of the present invention, the busbar single-phase earthing signal sent by receiving circuit monitoring terminal;It obtains and mother Electrical parameter Wave data of all outlets of the corresponding busbar of line single-phase earthing signal in the first preset duration;Joined according to electricity Number Wave data judges whether every outlet occurs earth fault respectively;It shows judging result, solves in the relevant technologies to hair The technical issues of method reliability that the circuit of raw singlephase earth fault is positioned is not high, and then realize can be more accurately Judge whether the technique effect of generation singlephase earth fault.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and forms the part of the application, this hair Bright illustrative embodiments and their description do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is a kind of flow chart of optional method for locating single-phase ground fault according to embodiments of the present invention;
Fig. 2 is a kind of schematic diagram of optional power distribution network;
Fig. 3 is the schematic diagram of another optional power distribution network;
Fig. 4 is a kind of schematic diagram of optional method for locating single-phase ground fault according to embodiments of the present invention;
Fig. 5 is a kind of schematic diagram of optional single-phase earth fault positioning device according to embodiments of the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing, 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 It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, " Two " etc. be the object for distinguishing similar, and specific sequence or precedence are described without being used for.It should be appreciated that it uses in this way Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or Sequence other than 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 listing clearly or for these processes, method, product Or the intrinsic other steps of equipment or unit.
This application provides a kind of embodiments of method for locating single-phase ground fault.
Fig. 1 is a kind of flow chart of optional method for locating single-phase ground fault according to embodiments of the present invention, such as Fig. 1 institutes Show, this method comprises the following steps:
Step S101, the busbar single-phase earthing signal that receiving circuit monitoring terminal is sent;
Step S102 obtains all outlets with the corresponding busbar of busbar single-phase earthing signal in the first preset duration Electrical parameter Wave data;
Step S103 judges whether every outlet occurs earth fault respectively according to electrical parameter Wave data;
Step S104 shows judging result.
First, the busbar single-phase earthing signal sent by performing step S101 receiving circuits monitoring terminal, in power distribution network Multiple path monitoring terminals are provided with, each path monitoring terminal is set on a busbar, and each path monitoring terminal is used for The electrical parameter of the corresponding busbar of monitoring, and according to the busbar electrical parameter monitored judge corresponding busbar whether single-phase earthing, for example, When monitoring that electric current is higher than predetermined threshold value determine that singlephase earth fault has occurred.When path monitoring terminal monitoring to earth fault Later, busbar single-phase earthing signal is sent, for representing that busbar monitors that earth fault has occurred.
After busbar single-phase earthing signal is received, step S102 is performed, is obtained opposite with busbar single-phase earthing signal Electrical parameter Wave data of all outlets for the busbar answered in the first preset duration.
Each busbar has a plurality of outlet, only can not by busbar single-phase earthing signal after earth fault has occurred The outlet specifically broken down is positioned, also, whether the earth fault that can not determine to occur is eliminated, it is then desired to logical Cross step S103 and obtain electrical parameter Wave data of the every outlet in the first preset duration, and according to electrical parameter Wave data with Judge whether outlet occurs earth fault.First preset duration is a period of time model before the generation of busbar single-phase earthing signal It encloses.
Specifically, step S103 judge whether every outlet occurs earth fault respectively according to electrical parameter Wave data can be with Including judging whether every outlet once occurred earth fault, current earth fault whether occurred, earth fault occurs Time etc..After step S104 is performed, judging result is shown.
As an alternative embodiment, after the busbar single-phase earthing signal sent in receiving circuit monitoring terminal, Ignore the busbar single-phase earthing signal received again in the second preset duration for receiving busbar single-phase earthing signal.It needs Illustrate, the second preset duration is a period of time range after the generation of busbar single-phase earthing signal.
Wherein, all outlets with the corresponding busbar of busbar single-phase earthing signal are being obtained in the first preset duration During electrical parameter Wave data, the electrical parameter waveform number that simultaneously receiving circuit monitoring terminal is sent can be waited in the second preset duration According to.If the busbar single-phase earthing signal received again during this period, ignores the signal received again.
As an alternative embodiment, judge whether every outlet is grounded respectively according to electrical parameter Wave data The step of failure, can include:Judge at the end of the second preset duration, whether busbar single-phase earthing signal is in action state; If it is judged that it is yes, it is determined that the type of earth fault is continuous earth failure;If it is judged that it is no, it is determined that connect The type of earth fault is transient earthing failure.In the optional embodiment, busbar single-phase earthing signal is one lasting Signal, during earth fault occurs for busbar during continuing, the action state of busbar single-phase earthing signal namely busbar list Whether phase ground signalling is still continuing, for example, path monitoring terminal monitors the electrical parameter of busbar in real time, if according to busbar Electrical parameter judges earth fault currently has occurred, then sends out busbar single-phase earthing signal, and according to the electrical parameter monitored in real time Judge whether still to send out busbar single-phase earthing signal.
In the case where the outlet with the corresponding busbar of busbar single-phase earthing signal includes the first outlet, according to electrical parameter Wave data judges that the step of whether every outlet occurs earth fault includes respectively:According to the different electrical parameters of the first outlet it Between related coefficient and/or, the related coefficient between the first outlet and the same electrical parameter of other outlets of corresponding busbar determines Whether the first outlet occurs earth fault.
The busbar single-phase earthing signal that the embodiment is sent by receiving circuit monitoring terminal;It obtains and busbar single-phase earthing Electrical parameter Wave data of all outlets of the corresponding busbar of signal in the first preset duration;According to electrical parameter Wave data Judge whether every outlet occurs earth fault respectively;It shows judging result, solves in the relevant technologies to single-phase earthing occurs The technical issues of method reliability that the circuit of failure is positioned is not high, and then realize and can more accurately judge whether to send out The technique effect of raw singlephase earth fault.
With reference to Fig. 2 to Fig. 4 to the method for locating single-phase ground fault that the embodiment provides in several optional distribution The application scenarios performed in net are described as follows:
Fig. 2 show a kind of optional power distribution network, and in fig. 2,110 be busbar, and 101~10n and 111 is going out for busbar Line, circuit 111 are faulty line, and 101~10n of circuit is sound circuit, and the R of Fig. 2 is resistance, C is capacitance, L is inductance, u is Voltage, i are electric current, K is switch.After singlephase earth fault generation, the zero-sequence current distribution on faulty line and sound circuit As shown in Figure 2.
Fig. 3 is the schematic diagram of another optional power distribution network, and in figure 3, circuit 201 to circuit 203 goes out for busbar 210 Line, 230 be arc suppression coil, and circuit 203 is faulty line, and circuit 201 and circuit 202 are sound circuit, and circuit 203 is in trouble point 220 have occurred failure, and Feeder Terminal Unit (abbreviation FTU) FTU1, FTU2, the FTU3 set on circuit 203 is used to detect circuit In waveform, wherein, the waveform of electrical parameter that multiple monitoring terminals (for example, FTU) detect is shown in Fig. 2.Faulty line Zero-sequence current distribution and similar situation are as shown in Figure 3 before and after upper trouble point.
As shown in Figures 2 and 3, when singlephase earth fault occurs for the busbar of power distribution network, current parameters can generate accordingly Variation, can be by setting multiple monitoring terminals in the line, each monitoring terminal is responsible for the electrical parameter values to one section of circuit It is monitored, and then reaches and identify whether that singlephase earth fault occurs and the position that singlephase earth fault occurs is determined Position.
It, can be by the processing of the singlephase earth fault of power distribution network and phase fault in power distribution network as shown in Figures 2 and 3 Troubleshooting is seamless to be fused in its fault processing module, and fault initiating, failure line selection and positioning, event are included in process flow Phragma is distinguishing from, non-faulting section service restoration, but in specifically processing details.
Specifically, implementation steps of the method for locating single-phase ground fault of embodiment offer under the application scenarios are such as Under:
(1) startup of singlephase earth fault processing
Entry condition is receives busbar single-phase earthing action signal (or " recording locking " remote signalling action).Busbar is received for the first time During single-phase earthing action signal (or " recording locking " remote signalling action), the waveform collection timer of application 5min (minute), this 5 In minute, receiving the landing operation signal (or " recording locking " remote signalling action) of the busbar again or repeatedly will all be considered as same Event.After 5min, the busbar single-phase earthing action signal (or " recording locking " remote signalling action) is received again by, then starts new one Secondary singlephase earth fault handles and applies for the waveform collection timer of 5min again.
(2) singlephase earth fault section judges
In the case of the waveform collection timer expired of 5min, advanced traveling wave graphic data collects, and it is as follows to collect process:
1st, all data of specified time range are extracted from the Wave data table of history library, as shown in figure 4, inquiry starting Time interval between time and timer application time is can be preset, for example, being set as 30S (second).
2nd, topological island range filter:Removal is not belonging to the record in the range of the transformer topology island.
Maximum cluster waveform selection:First to gathering temporally ascending sequence;Each recording is preserved to record in 5S backward All recordings record number, and compare and obtain the maximum;Corresponding maximum cluster is extracted.
3 then call single-phase earth fault line selection locating module, carry out the route selection and positioning of earth fault.
(3) permanent short circuit is uniformly processed with ground connection
Power distribution automation main station systematic unity has handled line short and earth fault.
When short trouble occurs for circuit, main station system is handled by existing procedure, carries out fault initiating, section judgement, isolation With recovery.
When earth fault occurs for circuit, main station system by the substation bus bar ground signalling sent in station, start ground connection therefore Hinder FA processing.Earth fault FA processing strategies are equally divided into positioning, isolation and restore three phases, and isolation strategy presses Minimum Area Principle is isolated, chooses the block switch closed on.Main station system only provides isolation and recovery policy, does not perform automatically, need to be by dispatching Personnel manually perform after confirming.
(4) fault message is shown
It specifically, can be with information presented below:
Time:The time that failure occurs (receives the time of busbar single-phase earthing action or the " record of first monitoring device The actuation time of wave " locking)
Substation:The affiliated substation of failure (having positioning function)
Fault type:Permanent fault either transient fault starts the waveform collection of 5min after the action of busbar single-phase earthing Timer, at the end of timer, if current busbar single-phase earthing signal be in action state, fault type is permanent former Barrier, is otherwise transient fault.
Transformer:The affiliated transformer of failure (having positioning function)
Busbar:(most two busbares of a condition name consider the female situation of a variable speed two, have the affiliated busbar of faulty line Positioning function)
Faulty line:(it is fixed to have for the affiliated circuit of fault section (when fault section is unknown, faulty line is also unknown) Bit function)
Fault section:The description of fault section.
(5) fault recorder data is shown
After selecting a pressure line monitoring device in wiring diagram, temporally its recorder data of cyclic polling, shows three-phase electricity Stream and synthesis zero-sequence current, three-phase with respect to earth electric field waveform.Recording figure should be drawn by the data point of former wave-recording sampling, Ensure that figure is clear, undistorted.
(6) instantaneity earth fault is checked
Circuit instantaneity earth fault equally reflects line insulation situation, and main station system provides independent monitoring interface and shows Show instantaneity earth fault, display content should include fault type (metallic ground, high resistance ground, arc grounding), the duration, Earth fault section location information etc..
(7) earth fault statistics and analysis
One-phase earthing failure in electric distribution network query statistic view is provided, such as:
By busbar, the continuous earth failure logging of time cycle statistics circuit;
By busbar, the time cycle, quantity statistics circuit transient earthing fault statistics information, choose a statistical information Afterwards, all transient earthing failure loggings of the circuit in measurement period can be checked;
By circuit, time cycle statistics continuous earth failure logging, after choosing a failure logging, it can check that circuit is first With the recorder data of monitoring device before and after trouble point;
By circuit, time cycle, quantity statistics transient earthing fault statistics information, after choosing a statistical information, can look into It sees all transient earthing failure loggings in measurement period, and further checks that the corresponding circuit of every failure logging is first and former The recorder data of monitoring device before and after barrier point.
Waveform Correlation analytical technology of the embodiment based on failure wave-recording, fully considers in Practical Project work progress The current transformer (CT) of terminal, the configuring condition of voltage transformer (PT), the time error situation of terminal use various features Component carries out the correlation comprehensive analysis of recording waveform, realizes that the route selection of various singlephase earth faults is with determining in Complicated Distribution Network Position.
Specifically, the embodiment realizes following technique effect:
1st, it is accurate with positioning to improve single-phase earth fault line selection for the Waveform Correlation algorithm based on multiple characteristic components Property.
2nd, the artwork for not needing to carry out faulty line topology again is safeguarded, improves the easy-to-use of phase-to-ground fault detection software Property.
3rd, the waveform of recorder data is shown, statistics and displaying to earth fault, helps to find power distribution network in advance Weak spot improves power distribution network reliability of operation.
The above embodiment is by comparing current waveform is similar under the different ground connection methods of operation, under different Groundings Degree, the amount characterized by similarity value, and the first half-wave method of stable status zero-sequence current colony amplitude comparison phase comparing method, transient current is combined, it is real The route selection and positioning of the singlephase earth fault of Complicated Distribution Network are showed.Specifically, having the beneficial effect that for bringing is described:
(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 calculates the similarity of line waveform, 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 component computing technique;When progress wave-form similarity compares, three-phase current has been carried out Wave-form similarity calculate, zero-sequence current wave-form similarity calculate, DC current similarity calculation;Comprehensive various result of calculations, Carry out the route selection and positioning of singlephase earth fault.
(3) since used fault current duration is long, general 5 minutes or so, not only include primary temporary stable state Current data, if there is intermittent ground connection during this, data used in calculating also include intermittent ground connection process The current data of middle acute variation is more conducive to the accurate route selection of singlephase earth fault.
(4) algorithm that property positions singlephase earth fault while failure data acquisition has decisive impact.Consider To the precision problem in the retardance of wireless telecommunications and circuit during terminal school, i.e.,:Part terminal is carried out accurate using GPS on circuit During true school, part terminal is calibrated by time server of power distribution automation main station, the time correct time of the part terminal There is certain error.Therefore, this software carries out correlation calculations, and before the computation using the current data that terminal juncture is marked The data are handled.
(5) this software with power distribution automation main station system is seamless merges, before wave-form similarity calculating is carried out, it is convenient to Topological island artwork data relevant with faulty line, real-time running data are collected together, it is single-phase to submit to the progress of this software The route selection and positioning of earth fault.
(6) realized in power distribution automation main station system phase fault and individual event earth fault, permanent fault with it is instantaneous Failure is uniformly processed.
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 sequence 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 method for locating single-phase ground fault of the embodiment of the present invention where controlling storage medium when program is run.
Present invention also provides a kind of embodiment of processor, the processor of the embodiment is used to run program, wherein, journey The method for locating single-phase ground fault of the embodiment of the present invention is performed during sort run.
Present invention also provides a kind of embodiments of single-phase earth fault positioning device.
Fig. 5 is a kind of schematic diagram of optional single-phase earth fault positioning device according to embodiments of the present invention, such as Fig. 5 institutes Show, which includes the first receiving module 10, acquisition module 20, judgment module 30 and display module 40.Wherein, first mould is received Block 10 is used for the busbar single-phase earthing signal that receiving circuit monitoring terminal is sent;Acquisition module 20 is for obtaining and busbar is single-phase connects Electrical parameter Wave data of all outlets of the corresponding busbar of earth signal in the first preset duration;Judgment module 30 is used for root Judge whether every outlet occurs earth fault respectively according to electrical parameter Wave data;Display module 40 is used to show judging result.
The busbar single-phase earthing signal that the embodiment is sent by the first receiving module receiving circuit monitoring terminal, by obtaining Modulus block obtains electrical parameter wave of all outlets in the first preset duration with the corresponding busbar of busbar single-phase earthing signal Graphic data judges whether every outlet occurs earth fault respectively by judgment module according to electrical parameter Wave data, by aobvious Show that module shows judging result, solve reliable to the method that is positioned of circuit of singlephase earth fault occurs in the relevant technologies Property it is not high the technical issues of, and then realize can more accurately judge whether occur singlephase earth fault technique effect.
Further, which further includes:Logic module connects for the busbar that is sent in receiving circuit monitoring terminal to be single-phase After earth signal, ignore that the busbar received again in the second preset duration for receiving busbar single-phase earthing signal is single-phase to be connect Earth signal.
Further, acquisition module includes:Second receiving module, for waiting for simultaneously receiving circuit in the second preset duration The electrical parameter Wave data that monitoring terminal is sent.
Further, judgment module includes:Judging submodule, for judging at the end of the second preset duration, busbar list Whether phase ground signalling is in action state;First determination sub-module, for if it is judged that being yes, it is determined that earth fault Type be continuous earth failure;Second determination sub-module, for if it is judged that being no, it is determined that the type of earth fault For transient earthing failure.
Further, in the case where the outlet with the corresponding busbar of busbar single-phase earthing signal includes the first outlet, Judgment module includes:Third determination sub-module, for the related coefficient between the different electrical parameters according to the first outlet and/or, Related coefficient between first outlet and the same electrical parameter of other outlets of corresponding busbar determines whether the first outlet connects Earth fault.
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 forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one deposit Store up chip.
The sequence of above-mentioned the embodiment of the present application does not represent the quality of embodiment.
In above-described embodiment of the application, all emphasize particularly on different fields to the description of each embodiment, do 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 It arrives, disclosed technology contents can be realized by another way.
Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, can be one Kind of division of logic function, can there is an other dividing mode in actual implementation, for example, multiple units or component can combine or It is desirably integrated into another system or some features can be ignored or does not perform.Another point, 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 It connects, can be electrical or other forms.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, it can also That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, 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 independent product sale or uses 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 It embodies, which is stored in a storage medium, is used including some instructions 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 aforementioned storage medium includes:USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store program code 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, under the premise of the application principle is not departed from, several 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)

1. a kind of method for locating single-phase ground fault, which is characterized in that including:
The busbar single-phase earthing signal that receiving circuit monitoring terminal is sent;
Obtain electrical parameter of all outlets with the corresponding busbar of busbar single-phase earthing signal in the first preset duration Wave data;
Judge whether every outlet occurs earth fault respectively according to the electrical parameter Wave data;
Show judging result.
2. the according to the method described in claim 1, it is characterized in that, busbar single-phase earthing sent in receiving circuit monitoring terminal After signal, the method further includes:
Ignore the busbar single-phase earthing received again in the second preset duration for receiving the busbar single-phase earthing signal Signal.
3. it according to the method described in claim 2, it is characterized in that, obtains and the corresponding mother of busbar single-phase earthing signal Electrical parameter Wave data of all outlets of line in the first preset duration includes:
The electrical parameter Wave data that the path monitoring terminal is sent is waited for and received in second preset duration.
4. according to the method described in claim 2, it is characterized in that, every institute is judged according to the electrical parameter Wave data respectively It states outlet earth fault whether occurs and include:
Judge at the end of second preset duration, whether the busbar single-phase earthing signal is in action state;
If it is judged that it is yes, it is determined that the type of the earth fault is continuous earth failure;
If it is judged that it is no, it is determined that the type of the earth fault is transient earthing failure.
5. according to the method described in claim 1, it is characterized in that, with the corresponding busbar of busbar single-phase earthing signal Outlet include the first outlet in the case of, judge whether every outlet occurs respectively according to the electrical parameter Wave data Earth fault includes:
According to the related coefficient between the different electrical parameters of first outlet and/or, first outlet and corresponding busbar Related coefficient between the same electrical parameter of other outlets determines whether first outlet occurs earth fault.
6. a kind of single-phase earth fault positioning device, which is characterized in that including:
First receiving module, the busbar single-phase earthing signal sent for receiving circuit monitoring terminal;
Acquisition module, for obtaining all outlets with the corresponding busbar of busbar single-phase earthing signal when first is default Electrical parameter Wave data in length;
Judgment module, for judging whether every outlet occurs earth fault respectively according to the electrical parameter Wave data;
Display module, for showing judging result.
7. device according to claim 6, which is characterized in that described device further includes:
Logic module, for after the busbar single-phase earthing signal that is sent in receiving circuit monitoring terminal, ignoring receiving State the busbar single-phase earthing signal received again in the second preset duration of busbar single-phase earthing signal.
8. device according to claim 7, which is characterized in that the acquisition module includes:
Second receiving module, for waiting for and receiving in second preset duration described in the path monitoring terminal transmission Electrical parameter Wave data.
9. device according to claim 7, which is characterized in that the judgment module includes:
Judging submodule, for judging at the end of second preset duration, whether the busbar single-phase earthing signal is in Action state;
First determination sub-module, for if it is judged that being yes, it is determined that the type of the earth fault is continuous earth event Barrier;
Second determination sub-module, for if it is judged that being no, it is determined that the type of the earth fault is transient earthing event Barrier.
10. device according to claim 6, which is characterized in that with the corresponding mother of busbar single-phase earthing signal In the case that the outlet of line includes the first outlet, the judgment module includes:
Third determination sub-module, for the related coefficient between the different electrical parameters according to first outlet and/or, it is described Related coefficient between first outlet and the same electrical parameter of other outlets of corresponding busbar determines whether first outlet is sent out Raw earth fault.
CN201711203602.7A 2017-11-24 2017-11-24 Method for locating single-phase ground fault and device Pending CN108132417A (en)

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Application publication date: 20180608