CN106771844A - A kind of power network multipoint line Fault Locating Method and system - Google Patents
A kind of power network multipoint line Fault Locating Method and system Download PDFInfo
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- CN106771844A CN106771844A CN201510809688.2A CN201510809688A CN106771844A CN 106771844 A CN106771844 A CN 106771844A CN 201510809688 A CN201510809688 A CN 201510809688A CN 106771844 A CN106771844 A CN 106771844A
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- traveling wave
- fault
- wave signal
- ranging device
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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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- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
The invention provides a kind of power network multipoint line Fault Locating Method and system, the system includes：It is arranged on the traveling wave ranging device and sensor of the outlet of every main line of transformer station, it is arranged on every wave filter of branch road head end of the main line, wherein, the wave arrestment frequency of each wave filter is differed, the sensor receives the travelling wave signal of failure point reflection and is transferred to the traveling wave ranging device, the traveling wave ranging device receives the fault traveling wave signal, frequency spectrum and catadioptric temporal information according to the fault traveling wave signal determine the distance of the circuit for breaking down and measuring and calculating trouble point and the traveling wave ranging device, it is determined that the position broken down.The present invention makes fault traveling wave signal have additional frequency spectrum information by setting the wave filter with different wave arrestment frequencies on each circuit, by analyzing the location of the traveling wave information localization of faults of trouble point, being capable of position that rapidly and accurately failure judgement occurs.
Description
Technical field
The present invention relates to power protection technology field, more particularly to a kind of power network multipoint line
Fault Locating Method and system.
Background technology
Power circuit is the chief component of power network, and overhead transmission line accident accounts for power system
More than the 80% of accident.With the development of fault localization technology, there is no the power circuit bag of branch
The fault localization for including cable and overhead transmission line is more and more ripe, reduces the workload of attendant,
And reduce the forced outage time.But, in the huge distribution network of data, distribution line
Majority has a plurality of branch.With the raising of power network intellectualized technology and power supply quality, multiterminal are supplied
Electricity causes that distribution line is more complicated.How accurate, the rapid trouble point position for judging distribution line
Put is to repair power circuit in time, improve the premise of power supply reliability.
China's power distribution network typically uses neutral point small current neutral grounding system, the permission of circuit single-phase earthing
Continue to run with.Now, as found trouble point not in time and eliminating, line to line fault is often developed into
Tripping operation.Localization of fault with branched line, typically now by intelligent distribution network or distribution
Automatic technology is realized.Wherein, short trouble can be protected by power current and differentiated simultaneously
Isolated, singlephase earth fault carries out interval judgement by gathering more complicated transient signal.
Certainly, using at GPS pairs and multiterminal travelling wave ranging technology can realize the range finding of branched line.
Generally, above method is required for means of communication, and judge is interval where trouble point,
Both two circuits between distribution terminal or fault detector.If Zai You branches in the middle of circuit,
Will be unable to judge；And, these methods are with high costs, unlikely obtain wide in power distribution network
General application.
Electric pulse when traveling wave method is punctured using line fault point, disruptive discharge at measurement failure
Time of the electric pulse from trouble point to test point can calculate trouble point distance.Traveling wave fault location
Do not influenceed by factors such as trouble point transition resistance, line constructions, and range accuracy is high, therefore
Obtain more being widely applied.For the circuit with branch, may under same fault distance
There is plurality of positions, therefore there is very big difficulty in multipoint line application in single-ended traveling wave method.
At present, have it is a kind of by fault signature using travelling wave ranging solve branched line differentiation ask
Topic, it is typical such as temporarily to drop spy using S-transformation spectral characteristic or by short trouble and busbar voltage
Non-linear relation between levying, obtains a kind of one-end fault localization method.But due to power distribution network
The phase modulus of each branched line zero it is basically identical, when it there is no imperfect earth, it is difficult to
Distinguish branched line.
The content of the invention
For defect of the prior art, the invention provides a kind of event of power network multipoint line
Barrier localization method and system, realize and accurate determine power network branched line and/or basic routing line
The purpose of the position of trouble point.
In a first aspect, the invention provides a kind of power network multipoint line fault location system,
It is characterised in that it includes：
The traveling wave ranging device and sensor of the outlet of every main line of transformer station are arranged on,
Every wave filter of branch road head end of the main line is arranged on,
Wherein, the wave arrestment frequency of each wave filter is differed, and the sensor receives event
Hinder the travelling wave signal of point reflection and be transferred to the traveling wave ranging device, the traveling wave ranging device
The fault traveling wave signal is received, frequency spectrum and catadioptric time according to the fault traveling wave signal
Information determine the circuit that breaks down and measuring and calculating trouble point and the traveling wave ranging device away from
From it is determined that the position broken down.
Wherein, the traveling wave ranging device includes travelling wave ranging unit and spectral analysis unit；
The spectral analysis unit is used to receive the fault traveling wave signal, and to the failed row
The frequency spectrum of ripple signal is analyzed the circuit for determining to break down；
The travelling wave ranging unit is used to calculate failure according to the catadioptric information of fault traveling wave signal
Put the distance with traveling wave ranging device；And according to the circuit for breaking down and the trouble point
The position broken down with the distance determination of traveling wave ranging device.
Wherein, the wave filter is arrowband trap.
Wherein, the spectral analysis unit is specifically included：
Receiver module, for receiving the fault traveling wave signal；
Spectrum analysis module, is analyzed for the frequency spectrum to fault traveling wave signal, obtains described
The Frequency point lacked in the frequency spectrum of fault traveling wave signal；
Fault determination module, for being searched and institute according to the Frequency point lacked in fault traveling wave signal
The corresponding wave filter of Frequency point is stated, and the line for determining to break down according to the position of the wave filter
Road.
According to another aspect of the present invention, there is provided a kind of power network multipoint line fault location
Method, it is characterised in that including：
The fault traveling wave signal of failure point reflection is received, according to the catadioptric of the fault traveling wave signal
Penetrate the time difference, calculate the distance of the trouble point and the traveling wave ranging device；
The frequency spectrum of the fault traveling wave signal is analyzed, obtains what is lacked in the fault traveling wave signal
Frequency point；
The corresponding wave filter of Frequency point lacked described in being searched in default wave filter in the line
Label；
Label according to the wave filter determines the circuit that failure occurs；
The distance of the circuit occurred according to the failure and the trouble point and traveling wave ranging device,
Determine the position that failure occurs.
Wherein, the wave arrestment frequency of default each wave filter is different from the line.
As shown from the above technical solution, the present invention provides a kind of power network multipoint line failure and determines
Position method and system, by setting the sensor with different wave arrestment frequencies on each branch road,
So that lack the wave arrestment frequency of the wave filter of circuit where trouble point in fault traveling wave signal, so that
Can determine failure occur circuit, then by calculate trouble point distance rapidly and accurately
The position broken down.The trouble spot judging of the Fault Locating Method of the invention is accurate, fits
For the low and medium voltage distribution network of a large amount of branched lines.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below
The accompanying drawing to be used needed for embodiment or description of the prior art will be briefly described, show and
Easy insight, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, on the premise of not paying creative work, can also be according to these
Figure obtains other accompanying drawings.
Fig. 1 is the structural representation of power network multipoint line fault location system of the invention；
Fig. 2 is the flow chart of power network multipoint line Fault Locating Method of the invention.
Fig. 3 is the original of the travelling wave ranging of power network multipoint line fault location system of the invention
Reason figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under the premise of creative work is not made,
Belong to the scope of protection of the invention.
Fig. 1 is the structural representation of power network multipoint line fault location system of the invention,
As shown in figure 1, the system includes：
It is arranged on the traveling wave ranging device 8 and sensor of the outlet of every main line of transformer station
7, it is arranged on the wave filter with different wave arrestment frequencies on every branch road of the main line.
Wherein, sensor 7 receives the fault traveling wave signal of trouble point and is transferred to traveling wave ranging device
8, after traveling wave ranging device 8 receives fault traveling wave signal, according to the fault traveling wave signal
Frequency spectrum and catadioptric temporal information determine the circuit for breaking down and measuring and calculating trouble point and the row
The distance of Wave ranging device, it is determined that the position broken down.
In above-described embodiment, as shown in figure 1, being connected with 1 time bus 2 of connection of main transformer
Multiple basic routing line 3-6, wherein by taking main line 3 as an example, there are multiple branch lines on main line 3
Road 31-34, and two grades of branched lines 341 on branch road 34, are set in the head end of each branch road
There is wave filter, sensor 31a is such as provided with branch road 31, sensor is provided with branch road 32
32a etc., and the wave arrestment frequency of each sensor differs.
It will be appreciated that above-mentioned each branched line is only used for for example, the present embodiment is not to it
It is defined, specific branched line can be understood as supplying each branched line of user, every
Head end in one distribution line can set sensor 7, traveling wave ranging device 8 and receive a plurality of distribution
The sensor of circuit head end, in order to be illustrated to said system, the present embodiment is only with distribution wire
Road 3 is illustrated.
Specifically, traveling wave ranging device includes travelling wave ranging unit and spectral analysis unit, wherein
Spectral analysis unit is used to receive the fault traveling wave signal, and to the fault traveling wave signal
Frequency spectrum is analyzed the circuit for determining to break down；
Travelling wave ranging unit be used for according to the catadioptric information of fault traveling wave signal calculate trouble point with
The distance of traveling wave ranging device；And according to the circuit for breaking down and the trouble point and row
The distance of Wave ranging device determines the position broken down.
Travelling wave ranging unit is made after being improved using existing fault travelling wave ranging instrument,
Such as the distance that travelling wave ranging calculates trouble point can be carried out using existing travelling wave ranging instrument, then
Failure is determined by the circuit for setting the distance of processing unit analysis trouble point and break down
Position.
In addition, spectral analysis unit can be specifically included：
Receiver module, for receiving the fault traveling wave signal；
Spectrum analysis module, is analyzed for the frequency spectrum to fault traveling wave signal, obtains described
The Frequency point lacked in the frequency spectrum of fault traveling wave signal；
Fault determination module, for being searched and institute according to the Frequency point lacked in fault traveling wave signal
The corresponding wave filter of Frequency point is stated, and the line for determining to break down according to the position of the wave filter
Road.
Said system is in transformer station's outlet installing fault travelling wave ranging device, branched line head end
Wave filter is set up, the travelling wave signal of trouble point is due to passing through some wave filter so that its frequency spectrum
In lack some Frequency point, by searching the corresponding wave filter of the Frequency point, such that it is able to true
The circuit of failure generation is determined, then by the catadioptric time localization of faults of fault traveling wave signal
Distance, can accurately determine the position broken down.This method is adapted to a plurality of branch
Feeder line fault ranging localization, including trolley line and cable run.
Above-mentioned setting wave filter can use narrow band filter, can not influence to absorb main line
Signal, while reaching the purpose of signal identification.In addition, the number of wave filter can also be according to need
It is arranged on corresponding branched line, can be respectively provided with whole branched lines, it is also possible to
Several branched lines are only set, can also be set on basic routing line, the present embodiment is not carried out to it
Limit.
It will be appreciated that the sensor can be travelling wave current sensor, or traveling wave
Voltage sensor, the present embodiment is no longer described in detail.
Fig. 2 is the flow chart of power network multipoint line Fault Locating Method of the invention.
In another embodiment of the present invention, there is provided a kind of power network multipoint line failure is determined
Position method, as shown in Fig. 2 its process includes：
S1, the fault traveling wave signal for receiving failure point reflection, according to the fault traveling wave signal
The catadioptric time difference, calculate the distance of the trouble point and the traveling wave ranging device；
Wherein, on the circuit in the method for the present invention, filter is provided with the head end of every straight line
Ripple device, and the wave arrestment frequency of each wave filter is different；
S2, the frequency spectrum for analyzing the fault traveling wave signal, obtain lacking in the fault traveling wave signal
Few Frequency point；
The corresponding filtering of Frequency point lacked described in being searched in S3, in the line default wave filter
The label of device；
S4, the circuit that failure generation is determined according to the label of the wave filter；
S5, the circuit occurred according to the failure and the trouble point and traveling wave ranging device away from
From, determine failure occur position.
In above-described embodiment, fault traveling wave signal is transferred to the traveling wave after sensor is received
Range unit is processed.
In the above method, by receiving the travelling wave signal of trouble point, because the traveling wave of trouble point is believed
Number lack some Frequency point by its frequency spectrum after certain wave filter, fault traveling wave signal is carried out
Frequency analysis, searches wave filter corresponding with the Frequency point for lacking, and may thereby determine that trouble point
The branch at place and basic routing line, with reference to the distance of the trouble point calculated in travelling wave ranging, can be with
It is quickly obtained location of fault.The method trouble spot judging is accurate, it is adaptable to a large amount of branch lines
The low and medium voltage distribution network on road.
Distance and trouble point that traveling wave ranging device obtains trouble point are included in following embodiments
The method of position be described in detail.
Above-mentioned traveling wave ranging device is carried out in detail according to the distance of the travelling wave signal localization of faults first
Describe in detail bright.
As shown in figure 3, when being broken down at the F of circuit, a traveling wave pulse will be produced to believe
Number to both sides (head end S and end R) transmit, and wave impedance change place occur it is catadioptric
Penetrate, including head end bus, line end, trouble point and each bifurcation.By sensor (electricity
Flow sensor IwaveOr voltage sensor Uwave) detect up to the traveling wave pulse signal at head end,
And send to travelling wave ranging instrument traveling wave pulse signal, it is initial that travelling wave ranging instrument meter calculates fault traveling wave
The time difference t of ripple and trouble point back wave2-t1, calculate trouble point to the distance of head endV is traveling wave speed, substantially one fixed value, with circuit space
Dielectric coefficient it is relevant with magnetic capacity.By calculating trouble point distance, it is possible to use with the line
The related data on road determines several possible position of failure point.
It is narrow additionally, being provided with wave filter on every branch road, for example, such as arrowband trap
Band filter can pass through most of traveling wave frequency spectrum, and power frequency impedance very little, to avoid
Influence the traveling wave fault location degree of accuracy or power frequency electric pressure drop.
Because the wave arrestment Frequency point of each wave filter is different, as shown in figure 1, can separately design for
The wave filter 31a of the head end of branch road 31 is 1kHz, and the wave filter 32a of the head end of branch road 32 is 2kHz,
The wave filter 33a of the head end of branch road 33 is 3kHz, and the wave filter 34a of the head end of branch road 34 is 4kHz,
Two grades of wave filter 341a of the head end of branched line 341 on branch road 34 are 5kHz, in above-mentioned filter
When ripple device is set, the wave arrestment frequency point parameters of above-mentioned wave filter are stored in advance in traveling wave ranging device.
When there is branch road to break down.The fault traveling wave letter of the faulty line that sensor 7 is received
After number, search in the frequency spectrum of fault traveling wave signal the Frequency point that lacks to determine the line that failure occurs
Road, for example, in above-mentioned example, if lacking 1kHz in receiving travelling wave signal, can
To determine that branch road 31 breaks down, similarly, if lacked in the fault traveling wave signal for receiving
Two Frequency points of 4kHz and 5kHz, then can determine the secondary branched line 341 on time branch road 34
Break down, finally in conjunction with trouble point distance, the position of trouble point can be accurately obtained.
It should be noted that the fetching portion elder generation of the position of the distance of above-mentioned trouble point and trouble point
Afterwards sequentially, it is also possible to while obtaining, it is also possible to successively obtain, the present embodiment is no longer carried out in detail
Explanation.
In sum, this programme passes through survey calculation trouble point distance, and failure judgement point branch,
Abort situation can be determined in transformer station, realize that fault localization is positioned.The precision of range finding is by traveling wave
The degree of accuracy of the precision and circuit data of rangefinder determines.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art
It should be understood that；It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to which part technical characteristic；And these modifications or replacement, not
Make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (6)
1. a kind of power network multipoint line fault location system, it is characterised in that including：
The traveling wave ranging device and sensor of the outlet of every main line of transformer station are arranged on,
Every wave filter of branch road head end of the main line is arranged on,
Wherein, the wave arrestment frequency of each wave filter is differed, and the sensor receives event
Hinder the travelling wave signal of point reflection and be transferred to the traveling wave ranging device, the traveling wave ranging device
The fault traveling wave signal is received, frequency spectrum and catadioptric time according to the fault traveling wave signal
Information determine the circuit that breaks down and measuring and calculating trouble point and the traveling wave ranging device away from
From it is determined that the position broken down.
2. system according to claim 1, it is characterised in that the traveling wave ranging device
Including travelling wave ranging unit and spectral analysis unit；
The spectral analysis unit is used to receive the fault traveling wave signal, and to the failed row
The frequency spectrum of ripple signal is analyzed the circuit for determining to break down；
The travelling wave ranging unit is used to calculate failure according to the catadioptric information of fault traveling wave signal
Put the distance with traveling wave ranging device；And according to the circuit for breaking down and the trouble point
The position broken down with the distance determination of traveling wave ranging device.
3. system according to claim 1, it is characterised in that the wave filter is arrowband
Trap.
4. system according to claim 2, it is characterised in that the spectral analysis unit
Specifically include：
Receiver module, for receiving the fault traveling wave signal；
Spectrum analysis module, is analyzed for the frequency spectrum to fault traveling wave signal, obtains described
The Frequency point lacked in the frequency spectrum of fault traveling wave signal；
Fault determination module, for being searched and institute according to the Frequency point lacked in fault traveling wave signal
The corresponding wave filter of Frequency point is stated, and the line for determining to break down according to the position of the wave filter
Road.
5. a kind of power network multipoint line Fault Locating Method, it is characterised in that including：
The fault traveling wave signal of failure point reflection is received, according to the catadioptric of the fault traveling wave signal
Penetrate the time difference, calculate the distance of the trouble point and the traveling wave ranging device；
The frequency spectrum of the fault traveling wave signal is analyzed, obtains what is lacked in the fault traveling wave signal
Frequency point；
The corresponding wave filter of Frequency point lacked described in being searched in default wave filter in the line
Label；
Label according to the wave filter determines the circuit that failure occurs；
The distance of the circuit occurred according to the failure and the trouble point and traveling wave ranging device,
Determine the position that failure occurs.
6. method according to claim 5, it is characterised in that default in the line every
The wave arrestment frequency of individual wave filter is different from.
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| CN201510809688.2A CN106771844B (en) | 2015-11-19 | 2015-11-19 | A kind of power network multipoint line Fault Locating Method and system |
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| CN201510809688.2A CN106771844B (en) | 2015-11-19 | 2015-11-19 | A kind of power network multipoint line Fault Locating Method and system |
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| CN106771844B CN106771844B (en) | 2019-10-15 |
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| CN118311378A (en) * | 2024-06-07 | 2024-07-09 | 国网山西省电力公司电力科学研究院 | Fault positioning method and device for power distribution network |
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| CN106771844B (en) | 2019-10-15 |
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