CN107907793A - One-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications - Google Patents
One-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications Download PDFInfo
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- CN107907793A CN107907793A CN201711120853.9A CN201711120853A CN107907793A CN 107907793 A CN107907793 A CN 107907793A CN 201711120853 A CN201711120853 A CN 201711120853A CN 107907793 A CN107907793 A CN 107907793A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
This application provides a kind of one-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications, the system comprises master unit module and some pair unit modules, the master unit module is in parallel with upstream transformer and is installed on the output terminal of the upstream transformer, the low-pressure side of the pair unit module and load transformer and in parallel with load branch circuit, the master unit module is electrically connected with the pair unit module by single-phase transmission line circuit；The master unit module is used to receive the separate of distribution network voltage information failure judgement generation, produces disturbance voltage and receives the current perturbation of pair unit module feedback；The pair unit module is used to receive the disturbance voltage that the master unit module produces and feeds back current perturbation.The one-phase earthing failure in electric distribution network detecting system and system based on two-way automated communications that the application provides, realize that master unit and pair unit information communicate, the more convenient detection for realizing singlephase earth fault position judges using SWER technologies.
Description
Technical field
This application involves Earth Fault Detection in Distribution Network field, more particularly to one kind to be based on two-way automated communications
One-phase earthing failure in electric distribution network detecting system and method.
Background technology
The domestic and international widely used isolated neutral of medium voltage distribution network or through the grounding through arc method of operation, relative to height
Power transmission network is pressed, the probability that medium voltage distribution network breaks down is high, and wherein singlephase earth fault takes place frequently.Singlephase earth fault is assignment
There is insulation breakdown between power grid conducting wire and ground, mostly occur and have impact on user just in moist, rainy weather, singlephase earth fault
Often power supply, and there may be overvoltage, equipment is burnt out, or even cause phase fault and expand accident.
Be broadly divided into two classes to the localization method of the trouble point of singlephase earth fault at present, active localization method with it is passive
Formula localization method.Active Fault Locating Method is to inject signal specific to system after line failure, by detecting
The distribution of Injection Signal in systems determines position of failure point.Passive type Fault Locating Method is then produced in itself using failure
The feature of voltage and current signal, Design Orientation algorithm, determines position of failure point.Active Fault Locating Method is broadly divided into again
Zero-sequence current mutation method, middle electric-resistivity method, transfer function method, signal injection method.Zero-sequence current mutation method is by varying arc blowout wire
Enclose parameter and produce the realization positioning of zero-sequence current Sudden Changing Rate, influenced greatly by jitterbug, and change arc suppression coil parameter and be unfavorable for
System safety.Middle electric-resistivity method is artificially to put into a medium resistance between property point and ground in systems after failure generation, and detection is attached
The power frequency fault current distribution added, this method artificially increase earth current, increase system security risk, and medium resistance
Difficult design.Transfer function method is to apply square wave diagnostic signal in failure exit according to a kind of single-ended of the frequency spectrum of transmission function
Distance measuring method, since distribution network parameters are complicated, this method is only feasible in theory, it is difficult to practical application.Generally actively
Signal injection method is since it avoids the vulnerability to jamming of fault-signal and and is widely applied in formula Fault Locating Method.
Signal injection method generally injects specific current signal, general exchange letter by busbar PT using signal injection device to system
Number injection method, which can shunt Injection Signal by PT capacity limits and distribution capacity there is Injection Signal, be influenced and be easy to cause
Localization of fault fails.
Therefore, how to realize fast and effectively phase-to-ground fault detection, be those skilled in the art's skill urgently to be resolved hurrily
Art problem.
The content of the invention
This application provides a kind of one-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications, uses
In realizing fast and effectively phase-to-ground fault detection.
In a first aspect, this application provides a kind of one-phase earthing failure in electric distribution network detection system based on two-way automated communications
System, the system comprises master unit module and some pair unit modules, the master unit module is in parallel with upstream transformer and pacifies
The low-pressure side of output terminal loaded on the upstream transformer, the pair unit module and load transformer and with load branch circuit simultaneously
Connection, the master unit module and the pair unit module are connected by three-phase conducting wire with power distribution network respectively；Wherein,
The master unit module be used for receive distribution network voltage information failure judgement generation it is separate, produce disturbance voltage and
Receive the current perturbation of pair unit module feedback；
The pair unit module is used to receive the disturbance voltage that the master unit module produces and feeds back current perturbation.
Optionally, in said system, the master unit module includes signal transformer, the first controlled thyristor, electric current and adopts
Acquisition means and calculation control module；Wherein,
The signal transformer is in parallel with the upstream transformer, first controlled thyristor and the signal transformer
Connection, the current collecting device connects with the calculation control module, the current collecting device and calculation control module and
The signal transformer and the connection of the first controlled thyristor.
Optionally, in said system, the pair unit module includes the second controlled thyristor, voltage collecting device and control
Module；Wherein,
Second controlled thyristor is in parallel with the load branch circuit, and the voltage collecting device connects with the control module
Connection is connect, the voltage collecting device is connected with control module with second controlled thyristor.
Optionally, in said system, the pair unit module further includes current-limiting impedance, the current-limiting impedance and second controllable
Thyristor connects.
Second aspect, this application provides a kind of one-phase earthing failure in electric distribution network detection method based on two-way automated communications
It the described method comprises the following steps：
Master unit module receives power distribution network three-phase voltage information, identifies singlephase earth fault, determines failure phase；
When singlephase earth fault occurs for the power distribution network, the master unit module injects disturbance voltage into the power distribution network
Signal, pair unit module is transferred to by the disturbance voltage signal；
The pair unit module receives the disturbance voltage and produces current perturbation；
The master unit module receives the current perturbation, analyzes the coding information that the current perturbation carries, and determines single
The position that phase earth fault occurs.
The one-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications that the application provides, work as distribution
When singlephase earth fault occurs for net, distribution network voltage signal is sent to the master unit for being installed on upstream transformer leading-out terminal, main list
Member is according to system voltage Judging fault phase and controls the power electronic equipment inside master unit to produce disturbance voltage in system, should
Disturbance voltage is delivered to by single-phase transmission line circuit (SWER, single wire earth return) and is installed on each branch line
The pair unit of distribution transformer low-pressure side on road, each pair unit control the production of internal power electronic device after receiving disturbance voltage
Raw small current disturbing signal, the small current disturbing signal of each electric current is passed back to master unit module by SWER, in master
The current disturbing signal of unit module detection feedback, encodes each pair unit positional information.If master unit receives
Some pair unit feedback current perturbation dropout arrived, illustrates that singlephase earth fault occurs for corresponding pair unit module section.This
The one-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications provided is provided, make use of SWER technologies real
Existing master unit and the communication of pair unit information, cost-effective and raising communication reliability, and pair unit module belongs to low-voltage module, tightly
Gather portable, and terminal device of the load end as household electrical appliance can be embedded in, more convenient realizes singlephase earth fault
The detection of position judges.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the one-phase earthing failure in electric distribution network detecting system provided by the embodiments of the present application based on two-way automated communications；
Fig. 2 is the one-phase earthing failure in electric distribution network detection method provided by the embodiments of the present application based on two-way automated communications
Structure flow chart；
Fig. 3 (a) is disturbance voltage detection waveform figure provided by the embodiments of the present application；
Fig. 3 (b) is disturbance voltage harmonic spectrum distribution map provided by the embodiments of the present application；
Fig. 4 (a) is current perturbation detection waveform figure provided by the embodiments of the present application；
Fig. 4 (b) is current perturbation harmonic spectrum distribution map provided by the embodiments of the present application.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device of some aspects being described in detail in claims, of the invention.
Referring to attached drawing 1, connect the figure shows the power distribution network provided by the embodiments of the present application based on two-way automated communications is single-phase
The basic structure of earth fault detecting system.Power distribution network single-phase earthing event provided by the embodiments of the present application based on two-way automated communications
Barrier detecting system includes master unit module 1 and some pair unit modules 2, and master unit module 1 is in parallel with upstream transformer and installs
In the output terminal of the upstream transformer, low-pressure side and with load branch circuit in parallel, main list of the pair unit module 2 with load transformer
Element module 1 and pair unit module 2 are connected by three-phase conducting wire with power distribution network respectively.Wherein,
Master unit module 1 is used to receive the separate of distribution network voltage information failure judgement generation, produces disturbance voltage and connects
Receive the current perturbation of the feedback of pair unit module 2.
Pair unit module 2 is used to receive the disturbance voltage of the generation of master unit module 1 and feeds back current perturbation.Pair unit module
2 quantity is corresponding with load branch circuit.
The embodiment of the present application make use of SWER, SWER to be based on TWACS (Two- to complete one-phase earthing failure in electric distribution network detection
Way Automated Communication System, two-way automated communications system) technology progress two-way signaling transmission,
TWACS technologies are the extension and expansion of zero cross distortion technology.The basic ideas of zero cross distortion technology are in electric current or electricity
Corrugating near zero-crossing point makes distribution using power switching device is controlled within a short period of time come interruptible load electric current or voltage
Net forms open circuit or short circuit within a very short time.Voltage or current waveform due to the active of switch cut-off have it is obvious
Disturbance, the disturbing signal can pass to each line feed terminals with power line carrier, complete the transmission of information.So pass through ripple
The distortion of shape extracts the pulse signal of needs, which communicates information to each electricity consumption end with the transmission of power line.
Master unit module is installed between upstream transformer outgoing line side and the earth, the voltage transformer secondary electricity of the outgoing line side
Pressure signal is connected to master unit module, and pair unit module is installed on the low-pressure side of the low voltage distribution transformer of each branched line, with
Low-voltage distribution transformer load is in parallel, is connected between major-minor unit module using SWER and controller switching equipment.Master unit module passes through reception
System voltage information judges that failure occurs separate, controls the angular system injection disturbance voltage signal of turn on thyristors of inside,
The current perturbation signal produced by each pair unit is detected, and singlephase earth fault is judged according to preset coding information and algorithm
Section；Pair unit module receives the disturbance voltage signal that master unit module produces, control pair unit inside modules power electronics dress
Put to system and inject current perturbation signal；Master unit module disturbance voltage signal is transferred to each pair unit module by SWER, also will
The current perturbation signal that each pair unit module produces is delivered to master unit module.When system jam, system failure voltage
Information is delivered to master unit module, and master unit module judges failure phase, master unit module injection disturbance voltage signal, voltage letter
Number be delivered to each pair unit module of distribution on SWER, pair unit module detect control after disturbance voltage signal it is internal
Power electronic equipment injects current perturbation signal, each pair unit module injection disturbance according to the sequential that master unit is set to power grid
Current signal has intervals, and current perturbation signal is transferred to master unit module, the detection of master unit module by SWER
The current perturbation information of feedback, precise positioning is carried out according to algorithm to fault section.
In the application embodiment, master unit module 1 include signal transformer 11, the first controlled thyristor 12,
Current collecting device 13 and calculation control module 14；Wherein, signal transformer 11 is in parallel with upstream transformer, the first controllable brilliant lock
Pipe 12 is connected with signal transformer 11, and current collecting device 13 is connected with calculation control module 14, the current collecting device 13
It is connected with calculation control module 14 with 11 and first controlled thyristor 12 of signal transformer.
Current collecting device 13 gathers the voltage and current signal of power distribution network middle and upper reaches transformer and load transformer, calculates
Control module 14 receives the signal that current collecting device 13 gathers, and judges the separate of the singlephase earth fault that power distribution network occurs, control
The opening and closing for making the first controlled thyristor 12 injects disturbance voltage signal by signal transformer 11 to power distribution network.Current collecting device
13 can be curtage collector, and calculation control module 14 can be to be built-in with the calculating control chip of certain algorithm.
In the application embodiment, pair unit module 2 includes the second controlled thyristor 21, voltage collecting device 22
With control module 23；Wherein, the second controlled thyristor 21 is in parallel with load branch circuit, and voltage collecting device 22 connects with control module 23
Connect, voltage collecting device 22 is connected with control module 23 with the second controlled thyristor 21.
Voltage collecting device 22 gathers the voltage and current signal of distribution network load branch, and 23 receiving voltage of control module is adopted
The signal that acquisition means 22 gather, the opening and closing of control controlled thyristor 12 produce current perturbation signal and by the current perturbation signal
Feed back to master unit module.Voltage collecting device 22 can be curtage collector
Further optimisation technique scheme, pair unit module 2 provided by the embodiments of the present application further include current-limiting impedance 24, current limliting
Impedance 24 is connected respectively with the second controlled thyristor 21, voltage collecting device 22 and control module 23.
The one-phase earthing failure in electric distribution network detecting system based on two-way automated communications provided based on the application, the application are real
Apply example and additionally provide a kind of one-phase earthing failure in electric distribution network detection method based on two-way automated communications, referring to attached drawing 2, the side
Method comprises the following steps：
S101：Master unit module receives power distribution network three-phase voltage information, identifies singlephase earth fault, determines failure phase.
S102：When singlephase earth fault occurs for the power distribution network, the master unit module is injected into the power distribution network disturbs
Dynamic voltage signal, pair unit module is transferred to by the disturbance voltage signal.
S103：The pair unit module receives the disturbance voltage and produces current perturbation；
S104：The master unit module receives the current perturbation, analyzes the coding information that the current perturbation carries, really
Determine the position of singlephase earth fault generation.
In the method, after pair unit module detects disturbance voltage, from " free time " State Transferring to " wait " state, often
A pair unit control module internal power electronic device produces current disturbing signal, and current disturbing signal is by SWER according to advance
The sequential of setting passes to master unit module, and master unit module receives multiple feedback informations with time tag, according to interior
The algorithm put carries out fault section location.
One-phase earthing failure in electric distribution network detecting system and method provided by the embodiments of the present application based on two-way automated communications,
When singlephase earth fault occurs for power distribution network, distribution network voltage signal is sent to the main list for being installed on upstream transformer leading-out terminal
Member, master unit is according to system voltage Judging fault phase and controls the power electronic equipment inside master unit to produce disturbance in system
Voltage, which is delivered to by single-phase transmission line circuit (SWER, single wire earth return) is installed on often
The pair unit of distribution transformer low-pressure side on a branched line, each pair unit control internal power electricity after receiving disturbance voltage
Sub-device produces small current disturbing signal, and the small current disturbing signal of each electric current is passed back to master unit mould by SWER
Block, in the current disturbing signal of master unit module detection feedback, encodes each pair unit positional information.If main list
Some pair unit feedback current perturbation dropout that member receives, illustrates that single-phase earthing event occurs for corresponding pair unit module section
Barrier.The one-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications that the application provides, make use of SWER
Technology realizes master unit and the communication of pair unit information, cost-effective and raising communication reliability, and pair unit module belongs to low pressure
Module, compact portable, and terminal device of the load end as household electrical appliance can be embedded in, more convenient realizes single-phase connect
The detection of earth fault position judges.
With reference to instantiation to the power distribution network single-phase earthing provided by the embodiments of the present application based on two-way automated communications
Fault detection system and method further illustrate, wherein by taking singlephase earth fault occurs for power distribution network A phases as an example.
When A singlephase earth faults occur for power distribution network, distribution network voltage occurs being input to master by voltage transformer secondary
The current collecting device of unit module, current collecting device is delivered to calculation control module by signal is gathered, according to built-in algorithm
Judge that the separate of singlephase earth fault occurs for power distribution network.
Calculation control module in master unit module is according to the distribution network voltage information of measurement, the brilliant lock of control non-faulting C phases
Pipe is closed a floodgate with certain combined floodgate angle, and interference voltage signal is injected into power distribution network, such as disturbance voltage signal under 150 ° of angles of flow.
The disturbance voltage signal is delivered to pair unit module by SWER, and pair unit module is real-time by voltage acquisition module
Collection voltages, do two neighboring periodic voltage mathematic interpolation, and ideally difference waveform is sine wave or is 0, when C phases are counted
When there is distorted voltage waveform in the difference of calculation, it is believed that detect system there occurs singlephase earth fault, this pair unit module from
" free time " state switches to " wait " state.
Each pair unit module passes through certain delay, controls the power electronic equipment of inside to produce current perturbation signal,
Each pair unit module sends current perturbation signal according to time sequencing is preset, by SWER to master unit；Master unit electricity
Stream collecting unit can measure a series of current perturbation signals with having time and tick lables, be calculated by Algorithm Analysis, into
Row singlephase earth fault is accurately positioned.
In the embodiment of the present application, disturbance voltage detection waveform figure and disturbance voltage harmonic spectrum distribution map are respectively such as attached drawing 3
(a) and shown in attached drawing 3 (b), current perturbation detection waveform figure and current perturbation harmonic spectrum distribution map respectively such as attached drawing 4 (a) and
Shown in attached drawing 4 (b).
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should all be included in the protection scope of the present invention.
It should be noted that herein, such as term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment
Intrinsic key element.
The above is only the embodiment of the present invention, is made skilled artisans appreciate that or realizing this hair
It is bright.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (5)
- A kind of 1. one-phase earthing failure in electric distribution network detecting system based on two-way automated communications, for one-phase earthing failure in electric distribution network Detection, it is characterised in that the system comprises master unit module and some pair unit modules, the master unit module becomes with upstream Depressor is in parallel and is installed on the output terminal of the upstream transformer, the low-pressure side of the pair unit module and load transformer and with Load branch circuit is in parallel, and the master unit module and the pair unit module are connected by three-phase conducting wire with power distribution network respectively；Wherein,The master unit module is used to receive the separate of distribution network voltage information failure judgement generation, produces disturbance voltage and reception The current perturbation of pair unit module feedback；The pair unit module is used to receive the disturbance voltage that the master unit module produces and feeds back current perturbation.
- 2. system according to claim 1, it is characterised in that the master unit module includes signal transformer, first can Control thyristor, current collecting device and calculation control module；Wherein,The signal transformer is in parallel with the upstream transformer, first controlled thyristor and the signal transformer string Connection, the current collecting device are connected with the calculation control module, the current collecting device and calculation control module and institute State signal transformer and the connection of the first controlled thyristor.
- 3. system according to claim 1, it is characterised in that the pair unit module includes the second controlled thyristor, electricity Press harvester and control module；Wherein,Second controlled thyristor is in parallel with the load branch circuit, and the voltage collecting device is connected with the control module, The voltage collecting device is connected with control module with second controlled thyristor.
- 4. system according to claim 3, it is characterised in that the pair unit module further includes current-limiting impedance, the limit Flow impedance is connected with second controlled thyristor.
- A kind of 5. one-phase earthing failure in electric distribution network detection method based on two-way automated communications, it is characterised in that the method bag Include following steps：Master unit module receives power distribution network three-phase voltage information, identifies singlephase earth fault, determines failure phase；When singlephase earth fault occurs for the power distribution network, the master unit module injects disturbance voltage letter into the power distribution network Number, the disturbance voltage signal is transferred to pair unit module；The pair unit module receives the disturbance voltage and produces current perturbation；The master unit module receives the current perturbation, analyzes the coding information that the current perturbation carries, determines single-phase connect The position that earth fault occurs.
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| CN201711120853.9A CN107907793A (en) | 2017-11-14 | 2017-11-14 | One-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications |
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| CN201711120853.9A CN107907793A (en) | 2017-11-14 | 2017-11-14 | One-phase earthing failure in electric distribution network detecting system and method based on two-way automated communications |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579671A (en) * | 2019-07-11 | 2019-12-17 | 国网江苏省电力有限公司徐州供电分公司 | single-phase earth fault detection system and method for neutral point ungrounded system |
| CN112213662A (en) * | 2020-09-07 | 2021-01-12 | 日照钢铁控股集团有限公司 | High-voltage cable single-phase earth fault judgment device and method |
| CN112485713A (en) * | 2020-11-30 | 2021-03-12 | 云南电网有限责任公司电力科学研究院 | Line selection device and method based on zero-break characteristic of ground fault current |
| CN114280424A (en) * | 2021-12-30 | 2022-04-05 | 山西恒运售电有限公司 | Power failure positioning system for power line repair |
| WO2022126176A1 (en) * | 2020-12-14 | 2022-06-23 | Ind Technology Pty Ltd | Early detection of defects on single-wire earth-return powerlines using a low-voltage sensing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846718A (en) * | 2010-06-22 | 2010-09-29 | 山东电力研究院 | Single-phase earth fault location system for distribution network of power system and method thereof |
| CN201796108U (en) * | 2010-06-22 | 2011-04-13 | 山东电力研究院 | Single-phase grounding fault positioning system for distribution network of electric power system |
| CN104991162A (en) * | 2015-06-21 | 2015-10-21 | 云南电力试验研究院(集团)有限公司 | Positioning device of small-current grounding system single-phase grounding fault and usage method |
| CN204719174U (en) * | 2015-06-21 | 2015-10-21 | 云南电力试验研究院(集团)有限公司 | A kind of locating device of single-phase grounded malfunction in grounded system of low current |
| CN106646136A (en) * | 2016-12-28 | 2017-05-10 | 山东大学 | Method and system for locating single-phase earth fault of parallel damping turn-adjustable type arc-extinction coil |
-
2017
- 2017-11-14 CN CN201711120853.9A patent/CN107907793A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846718A (en) * | 2010-06-22 | 2010-09-29 | 山东电力研究院 | Single-phase earth fault location system for distribution network of power system and method thereof |
| CN201796108U (en) * | 2010-06-22 | 2011-04-13 | 山东电力研究院 | Single-phase grounding fault positioning system for distribution network of electric power system |
| CN104991162A (en) * | 2015-06-21 | 2015-10-21 | 云南电力试验研究院(集团)有限公司 | Positioning device of small-current grounding system single-phase grounding fault and usage method |
| CN204719174U (en) * | 2015-06-21 | 2015-10-21 | 云南电力试验研究院(集团)有限公司 | A kind of locating device of single-phase grounded malfunction in grounded system of low current |
| CN106646136A (en) * | 2016-12-28 | 2017-05-10 | 山东大学 | Method and system for locating single-phase earth fault of parallel damping turn-adjustable type arc-extinction coil |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579671A (en) * | 2019-07-11 | 2019-12-17 | 国网江苏省电力有限公司徐州供电分公司 | single-phase earth fault detection system and method for neutral point ungrounded system |
| CN112213662A (en) * | 2020-09-07 | 2021-01-12 | 日照钢铁控股集团有限公司 | High-voltage cable single-phase earth fault judgment device and method |
| CN112485713A (en) * | 2020-11-30 | 2021-03-12 | 云南电网有限责任公司电力科学研究院 | Line selection device and method based on zero-break characteristic of ground fault current |
| WO2022126176A1 (en) * | 2020-12-14 | 2022-06-23 | Ind Technology Pty Ltd | Early detection of defects on single-wire earth-return powerlines using a low-voltage sensing method |
| CN114280424A (en) * | 2021-12-30 | 2022-04-05 | 山西恒运售电有限公司 | Power failure positioning system for power line repair |
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