CN110426606A - Based on wide area synchronous distribution net work earthing fault localization method and device - Google Patents
Based on wide area synchronous distribution net work earthing fault localization method and device Download PDFInfo
- Publication number
- CN110426606A CN110426606A CN201910858615.0A CN201910858615A CN110426606A CN 110426606 A CN110426606 A CN 110426606A CN 201910858615 A CN201910858615 A CN 201910858615A CN 110426606 A CN110426606 A CN 110426606A
- Authority
- CN
- China
- Prior art keywords
- unusual fluctuation
- bus bar
- voltage
- bar side
- line end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- G01R31/088—Aspects of digital computing
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of the distribution net work earthing fault localization methods and device synchronous based on wide area, are related to power system failure diagnostic technical field, the method comprises the following steps: obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side；The line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end；Abort situation is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time.The case where can be avoided sensor malfunction and misaction according to the technical solution of the present invention, improve equipment dependability, meanwhile the voltage waveform of recording can be back to by bus bar side edge proxies module by the residual voltage monitoring modular of each line end, realize the accurate positioning of fault point.
Description
Technical field
The present invention relates to power system failure diagnostic technical field, especially a kind of power distribution network ground connection synchronous based on wide area
Fault Locating Method and device.
Background technique
Power grid 10kV system is small current neutral grounding system, and small current neutral grounding system, which is especially grounded through arc suppression coil compensation, is
It unites, steady state fault feature is unobvious after single-phase earthing, and conventional algorithm can not make an accurate selection of, and can accurately obtain the algorithm of one of transient characteristic quantity
It implements and acquires a certain degree of difficulty.If ground fault occurs for distribution line can not be removed for a long time, after distribution line falls ground,
Easily because step voltage or contact voltage endanger passer-by.And earth current be more than a certain range when electric arc be difficult voluntarily to put out
It goes out, is easy to burn distribution line, causes fire, seriously affect power supply reliability, a lot of ground faults have occurred in recent years and have not cut
Except cause cable it is on fire caused by a wide range of power outages accident, not only cause the loss of equipment, load, also result in serious
Social influence.
Power distribution automation high speed development, for fast implement distribution line automate all standing, mainly use DTU, FTU,
The intelligent terminals such as fault detector, especially fault detector rely on cost performance height, installation to be easy, without advantages such as power failures, greatly
Batch application is in overhead transmission line indicating fault and studies and judges.But because fault detector itself design, producer's manufacturing quality and
The factors such as site environment there are indicator malfunction, tripping, can not capture transient information and recorder data is asynchronous etc. asks in high precision
Topic, leads to fault detector fault location and studies and judges inaccuracy, is that Fault Isolation and repairing work belt are next many inconvenient.
Summary of the invention
In view of the above drawbacks of the prior art, it is an object of the invention to provide a kind of power distribution networks synchronous based on wide area
Earth design method and device, improves equipment dependability at the case where avoiding sensor malfunction and misaction, meanwhile, it can be with
The voltage waveform of recording is back to bus bar side edge proxies module by the residual voltage monitoring modular of each line end, is realized
The accurate positioning of fault point.
An object of the present invention is that technical solution in this way is realized, a kind of power distribution network synchronous based on wide area connects
Earth fault localization method, the method comprises the following steps:
The bus bar side residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of bus bar side；
The line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end；
Fault bit is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time
It sets.
Optionally, the bus bar side residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of bus bar side, comprising:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side
Voltage cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
Optionally, after obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side, the method is also
Include: recording carried out to each outlet route, comprising:
Sensor unit is arranged in sectional on each outlet route, and at the voltage unusual fluctuation moment of the bus bar side, starting is each
The sensor unit of outlet route carries out recording；
The electric current cycle of bus bar side voltage unusual fluctuation moment front and back specified quantity is intercepted, and the electric current cycle is integrated
For zero-sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
Optionally, the line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end, comprising:
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
The line end voltage cycle of the voltage unusual fluctuation moment front and back specified quantity of the line end is intercepted, and will be described
Line end voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
Optionally, it is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time
Abort situation, comprising:
Faulty line and fault section are determined according to the preliminary fault line selection and fault locating result；
According to the faulty line and fault section and based on the voltage unusual fluctuation moment of the revised line end with
And the voltage unusual fluctuation moment of revised bus bar side determines position of failure point.
It is realized the second object of the present invention is to technical solution in this way, a kind of power distribution network synchronous based on wide area connects
Earth fault positioning device, described device include:
Bus bar edges proxy module, for obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side；
Route residual voltage monitoring modular, it is different for obtaining line end residual voltage according to the voltage unusual fluctuation of line end
The dynamic time；
Bus bar edges proxy module is also used to according to the bus bar side residual voltage unusual fluctuation time and line end zero sequence
The voltage unusual fluctuation time determines abort situation.
Optionally, the bus bar edges proxy module, is specifically used for:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side
Voltage cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
Optionally, described device further includes sensor unit；
The sensor unit sectional is arranged on each outlet route, at the voltage unusual fluctuation moment of the bus bar side, institute
It states bus bar edges proxy module and carries out recording for starting the sensor unit of each outlet route；
The bus bar edges proxy module is also used to intercept the electricity of specified quantity before and after the bus bar side voltage unusual fluctuation moment
Cycle is flowed, and the electric current cycle is integrated into zero-sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
Optionally, the route residual voltage monitoring modular, is specifically used for
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
The line end voltage cycle of the voltage unusual fluctuation moment front and back specified quantity of the line end is intercepted, and will be described
Line end voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
Optionally, the bus bar edges proxy module, specifically for according to the preliminary fault line selection and fault locating result
Determine faulty line and fault section；
According to the faulty line and fault section and based on the voltage unusual fluctuation moment of the revised line end with
And the voltage unusual fluctuation moment of revised bus bar side determines position of failure point.
By adopting the above-described technical solution, the present invention has the advantage that: according to the technical solution of the present invention can
The case where avoiding sensor malfunction and misaction improves equipment dependability, meanwhile, it can be supervised by the residual voltage of each line end
It surveys module and the voltage waveform of recording is back to bus bar side edge proxies module, realize the accurate positioning of fault point.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is first embodiment of the invention flow chart；
Fig. 2 is second embodiment of the invention connection relationship diagram.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
First embodiment of the invention proposes a kind of distribution net work earthing fault localization method synchronous based on wide area, the method
It comprises the following steps:
The bus bar side residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of bus bar side；
The line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end；
Fault bit is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time
It sets.
The case where inventive process avoids sensor malfunction and misaction improves equipment dependability, meanwhile, it can be by each
The voltage waveform of recording is back to bus bar side edge proxies module by the residual voltage monitoring modular of line end, realizes fault point
Accurate positioning.
Optionally, the bus bar side residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of bus bar side, comprising:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side
Voltage cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
Specifically, step S1: when bus bar side edge proxies module detects voltage unusual fluctuation, when recording residual voltage unusual fluctuation
Between；
When bus bar edges proxy module detects busbar voltage unusual fluctuation, according to the unusual fluctuation moment t01 detected, when intercepting this
Preceding 4 cycles and rear 8 cycle voltage waveforms are carved, sample frequency is 256 points of each cycle, then closes three-phase voltage waveform
And be residual voltage waveform, then to 5 sampled datas before t01 in residual voltage waveform sampling data and rear 5 sampled datas
Straight line fitting is carried out respectively, and calculating separately residual voltage and zero axle to intersect the moment is t02 and t03, takes t02 the and t03 average value to be
T01 (when before failure without unbalance voltage, takes T01=t03), and the amendment residual voltage unusual fluctuation moment is T01.
Optionally, after obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side, the method is also
Include: recording carried out to each outlet route, comprising:
Sensor unit is arranged in sectional on each outlet route, and at the voltage unusual fluctuation moment of the bus bar side, starting is each
The sensor unit of outlet route carries out recording；
The electric current cycle of bus bar side voltage unusual fluctuation moment front and back specified quantity is intercepted, and the electric current cycle is integrated
For zero-sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
Step S2: bus surveys the sensor unit recording that edge proxies module starts each outlet route installation；
Specifically, bus bar side edge proxies module starts the sensor unit recording of each outlet route installation, start the time
For t1,4 cycles and rear 8 cycle current waveforms before the moment are intercepted, sample frequency is 256 points of each cycle, and is merged
For zero-sequence current waveform, half of cycle sampled data after t1 is taken, arc suppression coil influence can be avoided, calculate zero-sequence current mutation side
To contrary according to zero-sequence current before and after faulty line fault point, faulty line and non-fault line head end zero-sequence current are prominent
It changes direction on the contrary, carrying out preliminary route selection and positioning, while recording zero-sequence current mutation time, fault point upstream and downstream mutation time divides
Txm and Txn are not denoted as it.
Optionally, the line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end, comprising:
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
The line end voltage cycle of the voltage unusual fluctuation moment front and back specified quantity of the line end is intercepted, and will be described
Line end voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
Specifically, step S3: each line end installs residual voltage monitoring modular, records the residual voltage unusual fluctuation time；
When each line end residual voltage monitoring modular detects voltage unusual fluctuation, according to the unusual fluctuation moment tx1 detected, cut
Take 4 cycles and rear 8 cycle voltage waveforms (sample frequency is 256 points of each cycle) before the moment, and by three-phase voltage
Waveform merges into residual voltage waveform, to 5 sampled datas before tx2 in residual voltage waveform sampling data and rear 5 hits
According to straight line fitting is carried out respectively, residual voltage is calculated separately with zero axle and intersects the moment for tx2 and tx3, takes tx2 and tx3 average value
For Tx1 (when before failure without unbalance voltage, taking Tx1=tx3), the amendment residual voltage unusual fluctuation moment is Tx1.
Optionally, it is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time
Abort situation, comprising:
Faulty line and fault section are determined according to the preliminary fault line selection and fault locating result；
According to the faulty line and fault section and based on the voltage unusual fluctuation moment of the revised line end with
And the voltage unusual fluctuation moment of revised bus bar side determines position of failure point.
Specifically, step S4: edge proxies module merges to be sensed on each end residual voltage monitoring modular and route
Device recorder data accurately completes route selection and positioning.
Bus bar side edge proxies module is according to step S2 route selection as a result, be positioned as x outlet failure, and it is fixed tentatively to complete section
Position is between xm sensor and xn sensor；Bus bar side edge proxies module is according to itself monitoring the residual voltage unusual fluctuation moment
The recording waveform and residual voltage unusual fluctuation moment Tx1 of T01 and x line end residual voltage monitoring modular passback, according to system
When distance L and fault point upstream and downstream the zero-sequence current mutation of the residual voltage monitoring modular installation site of model median generatrix
Between be denoted as Txm and Txn respectively, position of failure point can be accurately calculated.
A kind of distribution net work earthing fault localization method synchronous based on wide area of the invention, sensor unit is by mother on route
The case where line side edge proxies terminal starts after detecting residual voltage unusual fluctuation, avoids sensor malfunction and misaction is improved
Equipment dependability；Bus bar side edge proxies terminal, sensor unit and line end zero sequence voltage detection device are each equipped with
GPS clock synchronization module, sample frequency reach 256 points of every cycle, and sampling precision is high, transient process can be precisely captured, in arc blowout wire
Route selection and section positioning are completed before circle interference；Using residual voltage and the zero-sequence current different original of conduction time on the line
Reason merges line sensor and line end zero sequence voltage detection device to residual voltage, zero-sequence current unusual fluctuation moment, accurate meter
It calculates and obtains position of failure point；O&M cost is greatly reduced, application is in extensive range.
Second embodiment of the invention proposes a kind of distribution net work earthing fault positioning device synchronous based on wide area, such as Fig. 2 institute
Show, described device includes:
Bus bar edges proxy module, for obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side；
Route residual voltage monitoring modular, it is different for obtaining line end residual voltage according to the voltage unusual fluctuation of line end
The dynamic time；
Bus bar edges proxy module is also used to according to the bus bar side residual voltage unusual fluctuation time and line end zero sequence
The voltage unusual fluctuation time determines abort situation.
The case where inventive process avoids sensor malfunction and misaction improves equipment dependability, meanwhile, it can be by each
The voltage waveform of recording is back to bus bar side edge proxies module by the residual voltage monitoring modular of line end, realizes fault point
Accurate positioning.
Optionally, in an optional embodiment of the present invention, the bus bar edges proxy module is specifically used for:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side
Voltage cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
When bus bar edges proxy module detects busbar voltage unusual fluctuation, according to the unusual fluctuation moment t01 detected, when intercepting this
Preceding 4 cycles and rear 8 cycle voltage waveforms are carved, sample frequency is 256 points of each cycle, then closes three-phase voltage waveform
And be residual voltage waveform, then to 5 sampled datas before t01 in residual voltage waveform sampling data and rear 5 sampled datas
Straight line fitting is carried out respectively, and calculating separately residual voltage and zero axle to intersect the moment is t02 and t03, takes t02 the and t03 average value to be
T01 (when before failure without unbalance voltage, takes T01=t03), and the amendment residual voltage unusual fluctuation moment is T01.
Optionally, in an optional embodiment of the present invention, described device further includes sensor unit；
The sensor unit sectional is arranged on each outlet route, at the voltage unusual fluctuation moment of the bus bar side, institute
It states bus bar edges proxy module and carries out recording for starting the sensor unit of each outlet route；
The bus bar edges proxy module is also used to intercept the electricity of specified quantity before and after the bus bar side voltage unusual fluctuation moment
Cycle is flowed, and the electric current cycle is integrated into zero-sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
Specifically, bus bar side edge proxies module starts the sensor unit recording of each outlet route installation, start the time
For t1,4 cycles and rear 8 cycle current waveforms before the moment are intercepted, sample frequency is 256 points of each cycle, and is merged
For zero-sequence current waveform, half of cycle sampled data after t1 is taken, arc suppression coil influence can be avoided, calculate zero-sequence current mutation side
To contrary according to zero-sequence current before and after faulty line fault point, faulty line and non-fault line head end zero-sequence current are prominent
It changes direction on the contrary, carrying out preliminary route selection and positioning, while recording zero-sequence current mutation time, fault point upstream and downstream mutation time divides
Txm and Txn are not denoted as it.
Optionally, in an optional embodiment of the present invention, the route residual voltage monitoring modular is specifically used for
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
The line end voltage cycle of the voltage unusual fluctuation moment front and back specified quantity of the line end is intercepted, and will be described
Line end voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
When each line end residual voltage monitoring modular detects voltage unusual fluctuation, according to the unusual fluctuation moment tx1 detected, cut
Take 4 cycles and rear 8 cycle voltage waveforms (sample frequency is 256 points of each cycle) before the moment, and by three-phase voltage
Waveform merges into residual voltage waveform, to 5 sampled datas before tx2 in residual voltage waveform sampling data and rear 5 hits
According to straight line fitting is carried out respectively, residual voltage is calculated separately with zero axle and intersects the moment for tx2 and tx3, takes tx2 and tx3 average value
For Tx1 (when before failure without unbalance voltage, taking Tx1=tx3), the amendment residual voltage unusual fluctuation moment is Tx1.
Optionally, in an optional embodiment of the present invention, the bus bar edges proxy module is specifically used for according to institute
It states preliminary fault line selection and fault locating result and determines faulty line and fault section；
According to the faulty line and fault section and based on the voltage unusual fluctuation moment of the revised line end with
And the voltage unusual fluctuation moment of revised bus bar side determines position of failure point.
Bus bar side edge proxies module is according to step S2 route selection as a result, be positioned as x outlet failure, and it is fixed tentatively to complete section
Position is between xm sensor and xn sensor；Bus bar side edge proxies module is according to itself monitoring the residual voltage unusual fluctuation moment
The recording waveform and residual voltage unusual fluctuation moment Tx1 of T01 and x line end residual voltage monitoring modular passback, according to system
When distance L and fault point upstream and downstream the zero-sequence current mutation of the residual voltage monitoring modular installation site of model median generatrix
Between be denoted as Txm and Txn respectively, position of failure point can be accurately calculated.
By adopting the above-described technical solution, the present invention has the advantage that:
(1) sensor unit starts after detecting residual voltage unusual fluctuation by bus bar side edge proxies terminal on route, keeps away
The case where having exempted from sensor malfunction and misaction, improves equipment dependability；
(2) bus bar side edge proxies terminal, sensor unit and line end zero sequence voltage detection device are each equipped with GPS
Clock synchronization module, sample frequency reach 256 points of every cycle, and sampling precision is high, can precisely capture transient process, dry in arc suppression coil
Route selection and section positioning are completed before disturbing；
(3) using residual voltage and the zero-sequence current different principle of conduction time on the line, fusion line sensor and
Line end zero sequence voltage detection device accurately calculates acquisition position of failure point to residual voltage, zero-sequence current unusual fluctuation moment.
(4) O&M cost is greatly reduced, application is in extensive range.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are covered by the protection scope of the present invention.
Claims (8)
1. a kind of distribution net work earthing fault localization method synchronous based on wide area, which is characterized in that the method includes following step
It is rapid:
The bus bar side residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of bus bar side；
The line end residual voltage unusual fluctuation time is obtained according to the voltage unusual fluctuation of line end；
Abort situation is determined according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage unusual fluctuation time；
According to the voltage unusual fluctuation of bus bar side obtain the bus bar side residual voltage unusual fluctuation time after, further include, to each outlet route into
Row recording:
Sectional is arranged sensor unit and starts each outlet at the voltage unusual fluctuation moment of the bus bar side on each outlet route
The sensor unit of route carries out recording；
The electric current cycle of bus bar side voltage unusual fluctuation moment front and back specified quantity is intercepted, and the electric current cycle is integrated into zero
Sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
2. the method as described in claim 1, it is characterised in that: obtain bus bar side residual voltage according to the voltage unusual fluctuation of bus bar side
The unusual fluctuation time, comprising:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side voltage
Cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
3. method according to claim 2, it is characterised in that: obtain line end zero sequence according to the voltage unusual fluctuation of line end
The voltage unusual fluctuation time, comprising:
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
Intercept the line end voltage cycle of specified quantity before and after voltage unusual fluctuation moment of the line end, and by the route
Terminal voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
4. method as claimed in claim 3, it is characterised in that: according to the bus bar side residual voltage unusual fluctuation time and route
The end residual voltage unusual fluctuation time determines abort situation, comprising:
Faulty line and fault section are determined according to the preliminary fault line selection and fault locating result；
According to the faulty line and fault section and the voltage unusual fluctuation moment based on the revised line end and repair
The voltage unusual fluctuation moment of bus bar side after just determines position of failure point.
5. a kind of distribution net work earthing fault positioning device synchronous based on wide area, which is characterized in that described device includes:
Bus bar edges proxy module, for obtaining the bus bar side residual voltage unusual fluctuation time according to the voltage unusual fluctuation of bus bar side；
Route residual voltage monitoring modular, when for obtaining the unusual fluctuation of line end residual voltage according to the voltage unusual fluctuation of line end
Between；
Bus bar edges proxy module is also used to according to the bus bar side residual voltage unusual fluctuation time and line end residual voltage
The unusual fluctuation time determines abort situation；
Described device further includes sensor unit；
The sensor unit sectional is arranged on each outlet route, at the voltage unusual fluctuation moment of the bus bar side, the mother
The sensor unit that line edge proxies module is used to start each outlet route carries out recording；
The bus bar edges proxy module is also used to intercept the electric current week of specified quantity before and after the bus bar side voltage unusual fluctuation moment
Wave, and the electric current cycle is integrated into zero-sequence current waveform；
Preliminary fault line selection and fault locating is carried out based on the zero-sequence current waveform.
6. device as claimed in claim 5, which is characterized in that the bus bar edges proxy module is specifically used for:
In bus bar side voltage unusual fluctuation, the voltage unusual fluctuation moment of bus bar side is obtained；
Intercept the bus bar side voltage cycle of specified quantity before and after bus bar side voltage unusual fluctuation moment, and by the bus bar side voltage
Cycle is integrated into bus bar side residual voltage waveform；
The voltage unusual fluctuation moment based on the bus bar side carries out linear fit to the bus bar side residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to bus bar side.
7. device as claimed in claim 6, which is characterized in that the route residual voltage monitoring modular is specifically used for
When line end detects line end voltage unusual fluctuation, the voltage unusual fluctuation moment of line end is obtained；
Intercept the line end voltage cycle of specified quantity before and after voltage unusual fluctuation moment of the line end, and by the route
Terminal voltage cycle is integrated into line end residual voltage waveform；
The voltage unusual fluctuation moment based on the line end carries out linear fit to the line end residual voltage waveform；
It is modified according to voltage unusual fluctuation moment of the result of linear fit to line end.
8. device as claimed in claim 7, which is characterized in that the bus bar edges proxy module is specifically used for according to
Preliminary fault line selection and fault locating result determines faulty line and fault section；
According to the faulty line and fault section and the voltage unusual fluctuation moment based on the revised line end and repair
The voltage unusual fluctuation moment of bus bar side after just determines position of failure point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910858615.0A CN110426606B (en) | 2019-09-11 | 2019-09-11 | Power distribution network ground fault positioning method and device based on wide area synchronization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910858615.0A CN110426606B (en) | 2019-09-11 | 2019-09-11 | Power distribution network ground fault positioning method and device based on wide area synchronization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110426606A true CN110426606A (en) | 2019-11-08 |
| CN110426606B CN110426606B (en) | 2021-07-27 |
Family
ID=68418989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910858615.0A Active CN110426606B (en) | 2019-09-11 | 2019-09-11 | Power distribution network ground fault positioning method and device based on wide area synchronization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110426606B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
| CN111579918A (en) * | 2020-04-13 | 2020-08-25 | 上海紫通信息科技有限公司 | Sampling synchronous correction method for transient recording type fault indicator |
| CN113311360A (en) * | 2021-05-28 | 2021-08-27 | 苏州银蕨电力科技有限公司 | Sectional type line grounding fault detection and isolation system and detection and isolation method thereof |
| CN113567806A (en) * | 2021-07-02 | 2021-10-29 | 上海思源光电有限公司 | Small current fault line selection method, system, terminal and medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535883A (en) * | 2014-12-29 | 2015-04-22 | 北京四方继保自动化股份有限公司 | Small current grounding fault line selection method based on full-system grounding fault information |
| CN104808114A (en) * | 2015-05-04 | 2015-07-29 | 中国矿业大学 | Low-current grounding fault line selection method based on wide-area zero-sequence voltage distribution characteristics |
| US9369408B1 (en) * | 2014-01-31 | 2016-06-14 | Google Inc. | High performance and resilience in wide area networking |
| CN109188195A (en) * | 2018-08-17 | 2019-01-11 | 国网江苏省电力有限公司电力科学研究院 | A kind of distribution small current grounding fault localization method and system |
| CN109995145A (en) * | 2019-05-15 | 2019-07-09 | 国网湖北省电力有限公司电力科学研究院 | A kind of low-voltage network failure active analysis method based on intelligent distribution transformer terminals |
-
2019
- 2019-09-11 CN CN201910858615.0A patent/CN110426606B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9369408B1 (en) * | 2014-01-31 | 2016-06-14 | Google Inc. | High performance and resilience in wide area networking |
| CN104535883A (en) * | 2014-12-29 | 2015-04-22 | 北京四方继保自动化股份有限公司 | Small current grounding fault line selection method based on full-system grounding fault information |
| CN104808114A (en) * | 2015-05-04 | 2015-07-29 | 中国矿业大学 | Low-current grounding fault line selection method based on wide-area zero-sequence voltage distribution characteristics |
| CN109188195A (en) * | 2018-08-17 | 2019-01-11 | 国网江苏省电力有限公司电力科学研究院 | A kind of distribution small current grounding fault localization method and system |
| CN109995145A (en) * | 2019-05-15 | 2019-07-09 | 国网湖北省电力有限公司电力科学研究院 | A kind of low-voltage network failure active analysis method based on intelligent distribution transformer terminals |
Non-Patent Citations (2)
| Title |
|---|
| 姚艳霞 等: "基于广域同步测量技术定位间歇性单相接地故障的方法及应用", 《数字通信世界》 * |
| 郭雷 等: "基于时间和空间信息的间歇性单相接地故障检测和定位方法及应用", 《第三届智能电网会议论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
| CN111257700B (en) * | 2020-03-31 | 2020-10-30 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
| CN111579918A (en) * | 2020-04-13 | 2020-08-25 | 上海紫通信息科技有限公司 | Sampling synchronous correction method for transient recording type fault indicator |
| CN113311360A (en) * | 2021-05-28 | 2021-08-27 | 苏州银蕨电力科技有限公司 | Sectional type line grounding fault detection and isolation system and detection and isolation method thereof |
| CN113567806A (en) * | 2021-07-02 | 2021-10-29 | 上海思源光电有限公司 | Small current fault line selection method, system, terminal and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110426606B (en) | 2021-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110426606A (en) | Based on wide area synchronous distribution net work earthing fault localization method and device | |
| CN109444640B (en) | Power distribution network single-phase high-resistance earth fault detection method, system and storage medium | |
| CN106646139B (en) | A kind of electrical power distribution network fault location method based on three-phase current amplitude analysis | |
| US9874593B2 (en) | Decision support system for outage management and automated crew dispatch | |
| CN105116246B (en) | A kind of operation of power networks protection on-line analysis method | |
| CN104166067A (en) | Single-phase earth fault positioning detection method and device | |
| CN102298671A (en) | Simulation method for realizing replay of grid fault | |
| CN110824300A (en) | Edge computing system for power distribution network fault detection and positioning | |
| CN106646130B (en) | A kind of active distribution network Fault Locating Method compared based on current polarity and system | |
| CN102097792B (en) | Ground fault protection method of distribution network | |
| CN106093714A (en) | The selection method of single-phase grounded malfunction in grounded system of low current circuit | |
| CN109239524A (en) | A kind of low current method for locating single-phase ground fault based on three-phase current amplitude | |
| CN104950216A (en) | Waveform comparison based power distribution line fault positioning method | |
| CN109782108A (en) | A kind of single-phase grounded malfunction in grounded system of low current localization method and device | |
| CN114384374A (en) | Fault study and judgment method and device based on edge calculation FTU and fault indicator | |
| CN101943738B (en) | Single-phase grounding distance measuring method and distance measuring device | |
| Li et al. | A review of single-phase-to-ground fault location methods in distribution networks | |
| CN103616616A (en) | Fault detection method for large-scale grounding grid | |
| CN102540015B (en) | Single-phase earthing of small current earthing system distance-finding method and distance measuring equipment | |
| CN104898017B (en) | Distribution network line fault Section Location based on Euclidean distance | |
| CN111983509B (en) | Distributed line fault detection method and device | |
| CN211263669U (en) | Edge computing system for power distribution network fault detection and positioning | |
| CN109387724A (en) | Based on the lateral modified synchronous capacitor method for diagnosing faults of vertical analysis | |
| CN108072813A (en) | Topology automatically generates and reconstructing method in a kind of transmission line travelling wave ranging networking project | |
| Badran et al. | Comprehensive fault reporting for three-terminal transmission line using adaptive estimation of line parameters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |