CN106646133A - Regional power grid T line fault range-finding system based on generalized measurement - Google Patents
Regional power grid T line fault range-finding system based on generalized measurement Download PDFInfo
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- CN106646133A CN106646133A CN201611204956.9A CN201611204956A CN106646133A CN 106646133 A CN106646133 A CN 106646133A CN 201611204956 A CN201611204956 A CN 201611204956A CN 106646133 A CN106646133 A CN 106646133A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
- G01S19/17—Emergency applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a regional power grid T line fault range-finding system based on generalized measurement, and the system employs distributed sampling terminals, a communication network, and a traveling wave range-finding analysis center. The distributed sampling terminals comprise non-contact voltage and current traveling wave collection devices disposed at poles, and each non-contact voltage and current traveling wave collection device collects an abrupt signal of a traveling wave, and uploads the abrupt signal to the traveling wave range-finding analysis center of a main station through a communication network. The traveling wave range-finding analysis center calculates the position of a fault point through employing the information uploaded by the sampling terminals, taking the time marks of two ends of a fault branch circuit as the references, combining the parameters of the fault branch circuit and employing a double-end traveling wave fault range-finding theory, thereby achieving the fault range finding of the T circuit of a power grid. The system avoids the impact on a transition resistor, is better in range-finding precision, and plays an important role in improving the power supply reliability of a regional power grid.
Description
Technical field
The present invention relates to a kind of area power grid T link fault localization systems measured based on broad sense.
Background technology
In recent years, with the fast development of social economy, electricity consumption needs to grow with each passing day, especially in peak period summer, electricity
Often close to full-load run, how fast recovery of power supply, the continuation that safeguards system is powered transports inspection personnel to net load to electrical network
Carry out patrolling and examining and propose new challenge.Therefore, when failure occurs, quick fault location, so as to regulate and control for operation of power networks
Personnel arrange in time fortune inspection personnel to carry out breakdown repair and win the quality time, will produce weight to the safe and reliable power supply of area power grid
The meaning wanted.
Electric network fault position is quickly positioned, traditional analysis are mainly impedance method and traveling wave method.Impedance method has
The features such as having simple realization, economic and reliable, is widely used in power system.It is fast with electrical network scale in recent years
Speed expands, and the radius of electricity supply of electrical network also increasingly increases, and T links are widely present in the electrical network below 110kV grades, when it
To carry out fault localization just hard to carry on for traditional impedance method during raw failure.In recent years traveling wave method had applied range, reality because of it
With property is strong, accurate positioning the features such as find range in electric power system fault and be able to fast development with the field such as positioning.Current 110kV circuits
And in the power distribution network of below 10kV electric pressures, impedance method is used widely in electrical power distribution automatization system, but it still cannot
Realization is accurately positioned, and to electrical network patrol officer very big difficulty is brought, and the present invention is by the traveling wave method will be based on broad sense measurement
In being introduced into the T link fault localizations of 110kV area power grids, to expect to improve, solve this problem.
In view of the operation principle and electrical characteristic of conventional current transformer, install current transformer additional in existing circuit and deposit
Electric currents and voltage sensor in many difficulties and traditional is easily effected by saturation, and I＆M is complicated.In the face of such bottleneck
Problem, it is necessary to seek new metering system, realizes safe and effective overhead transmission line current monitoring.
Current 110kV cities backbone's electrical network, due to the fast development in city, its cable often goes out simultaneously with overhead transmission line Jing
In a present transmission line of electricity, T links are even more present in a large number the electric pressure electrical network, and many unfavorable factors are to 110kV cities
The enforcement of utility grid fault localization causes how considerable hurdle realizes fast, accurately fault localization, to mitigate electrical network
The workload of operation maintenance personnel, it is rapid to search line fault point, shorten troubleshooting time, it is caused because having a power failure so as to reduce
Economic loss, it is already extremely urgent for 110kV urban distribution networks.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of area power grid T links failure measured based on broad sense is surveyed
Away from system, the present invention is connect for the fault localization problem of T links in 110kv area power grids using a kind of nothing for installing maintenance
Gathering travelling wave signal, substitute traditional needs to access the voltage or electric current of working line touch voltage x current traveling wave induction installation
Transformer, the transmission line of electricity transient current information collected using electromagnetic field inducing principle, is further used for travelling wave ranging, realizes
Being accurately positioned of failure.Connect by a 110kV circuit T to somewhere electrical network and be analyzed, based on the row that broad sense is measured
Ripple collection range finding it is theoretical can economic and reliable the fault localization for solving the problems, such as area power grid, be that the power supply reliability of raising electrical network is carried
For effective guarantee.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of area power grid T link fault localization systems measured based on broad sense, including distributed sample terminal, communication
Network and travelling wave ranging analysis center, wherein, the distributed sample terminal is arranged on the non-contact type at shaft tower including each
Voltage x current traveling wave harvester, the non-contact voltage current traveling wave harvester gathers the jump signal of traveling wave, and will
It passes through the travelling wave ranging analysis center that communication network is uploaded to main website, and travelling wave ranging analysis center uploads each sampling terminal
Information, on the basis of the markers of fault branch two ends, combination failure branch road line parameter circuit value is theoretical using both-end traveling wave fault location,
Position of failure point is calculated, the fault localization of the T links of electrical network is realized.
The non-contact voltage current traveling wave collection dress is arranged in the shaft tower of the first and last end of circuit and the T contacts of circuit
And at shaft tower and cable connection, it is responsible for the collection of fault traveling wave signal when line fault occurs.
The non-contact voltage current traveling wave harvester, including wireless communication module and synchronised clock module, traveling wave
Harvester is powered by solar panel.
Equal GP configuring S of the non-contact voltage current traveling wave harvester, target when uploading unified by wireless network
Malfunction monitoring data.
The non-contact voltage current traveling wave harvester is installed using asymmetrical three-phase.
The travelling wave ranging analysis center includes prepositive communication computer, server and work station center, the prepositive communication computer
It is responsible for completing stipulations conversion, by system and the data-interface of acquisition terminal, sends data to server, server is responsible for place
Reason and analyze data, its built-in T links Fault Location Algorithm, there is provided data channel, interface SCADA system；Work station center
The graphics process of responsible user interface and displaying function.
Differentiation of the travelling wave ranging analysis center to fault branch is determined with the terminal of target data during all upload bands
Fault zone, according to time-sequencing the monitoring point of the initial traveling wave of each failure is detected, the Network topology in combination failure region, i.e.,
Can determine whether the branch road of guilty culprit.
The travelling wave ranging analysis center is analyzed using both-end travelling wave ranging principle, is distinguished using failure initial row ripple
The time at faulty line two ends is reached, the range finding of trouble point is realized.
Beneficial effects of the present invention are：
(1) each distributed sample terminal of the invention is mainly arranged in the shaft tower of the first and last end of circuit and the T contacts of circuit
And at shaft tower and cable connection, it is responsible for the collection of fault traveling wave signal when line fault occurs.Each sampling terminal is united using GPS
One time service, it is ensured that the height reliability of data.It is high with transfer rate using GPRS communication networks, support IP agreement, resource
Utilization rate is high, the features such as with low cost；
(2) harvester of the invention install, it is easy to maintenance, signal is gathered by field detection mode, without the need for accessing electric power
System primary side, it is to avoid the equipment such as traditional PT, CT installs the impact caused to operation of power networks, and regular maintenance is convenient to；
With extremely strong adaptability, it is applied to overhead transmission line, buried cable and overhead transmission line and the various complexity such as mixes with buried cable
Line mode；Double collections of electric current, voltage traveling wave signal are realized, can be provided most comprehensively, accurately, in high precision for fault localization
Signal support；Low-power consumption and flexible power supply mode, the environment remote for field etc., the solar panels carried using device
The power consumption requirements of its day-to-day operation can be met, for Urban Underground circuit etc. can power taking on the spot, it is easy to accomplish；
(3) it is easy to install, and easily promote：Equipment install, safeguard do not affect circuit charging operation (traditional terminal transformer by
In primary side serial or parallel connection is needed in terminating circuit, installation, maintenance need power operation)；In existing FTU, DTU etc. eventually
At the node of end equipment, can the existing monitoring terminal of renovation and utilization executing agency, only need to update its controller, easily promote.
(4) impact strength detection：Detection signal impact strength, low-cost equipment can just realize high-quality monitoring,
Easily realize；Device energy-wasting is low, it is possible to achieve self-powered：Device carries solar panel, coordinates miniature energy storage device, power taking
Convenient, power consumption is low, can work long hours in various complicated adverse circumstances.
(5) based on Two-terminal Fault Location principle, adopted using touchless distributed induction type voltage traveling wave harvester
Collection traveling wave information, based on electromagnetic induction principle intensity detection is carried out, with sample frequency it is high, sensitivity is high, range accuracy it is high with
And it is easy to install the features such as, for the quick fault location of electrical network patrol officer and breakdown repair can be carried out important reference is provided.
Description of the drawings
Fig. 1 (a) is the line fault conditions schematic diagram of the present invention；
Fig. 1 (b) is the circuit non-faulting view of the present invention；
Fig. 1 (c) is the line fault additivity schematic diagram of the present invention；
Fig. 2 is the travelling wave signal harvester schematic diagram of the present invention；
Fig. 3 is the Traveling wave fault location system schematic diagram of the present invention；
Fig. 4 is that the distribution of the Traveling wave fault location system of the present invention constitutes schematic diagram；
Fig. 5 is 110kV circuits T binding compositions of the present invention；
Fig. 6 is electrical network 110kV line assumption diagrams.
Specific embodiment：
Below in conjunction with the accompanying drawings the invention will be further described with embodiment.
Traveling wave is gathered and range measurement principle
Travelling wave ranging is theoretical
When transmission line of electricity breaks down, it is possible to use principle of stacking, can be equivalent by line fault conditions Fig. 1 (a) Suo Shi
It is divided into shown in non-faulting state Fig. 1 (b) and shown in failure additivity Fig. 1 (c).
Fig. 1 (b) non-faulting states refer to the normal operating condition before failure, equivalent voltage source UfNumerical value is trouble point fault-free
When normal voltage；Failure additivity is that occur after a failure, and with non-faulting of-state voltage numerical value equal direction conversely, its
Additional equivalent voltage source is-Uf.Failure additivity is affected independently of non-faulting state by system operation mode.Failure
Equivalent voltage source-U in additivityfPresence, the advancing wave propagated to circuit two ends from trouble point will be produced in transmission line of electricity,
Simultaneously because the characteristics of distributed parameters of transmission line of electricity, the advancing wave has high frequency property, and with the spread speed of the close light velocity,
Thus fault traveling wave is produced.
The present invention adopts both-end travelling wave ranging principle, and its central principle is to arrive separately at fault wire using failure initial row ripple
The T at road two endsM、TN, realize the range finding of trouble point.Two-terminal Fault Location both-end traveling wave fault location merely with the initial traveling wave of failure,
Not there is a problem of that catadioptric wave property is recognized, the general amplitude of the initial traveling wave of failure is larger, and singularity is stronger, is easier to realize ripple
The detection of head singular point, it is however generally that both-end traveling wave fault location has higher accuracy and reliability.But the event of both-end traveling wave
Barrier distance-finding method needs to install traveling wave fault location device and Synchronization Clock at the two ends of faulty line.It is double by inciting somebody to action
End range measurement principle application is analyzed to three end traveling wave fault locations, can the accurate positioning for carrying out trouble point.
Non-contact voltage current traveling wave harvester
Due to city 110kV level Grid wiring it is more complicated, traditional signal pickup assembly such as voltage transformer (PT),
Current transformer (CT) etc. needs line outage to be installed, and to the normal operation of electrical network difficulty is brought.The present invention is by answering
With non-contact voltage current traveling wave harvester, it will can make shaft tower based on the Cleaning Principle of field when occurring due to traveling wave
The electromagnetic field for going out is undergone mutation, and by non-contact type traveling wave harvester the jump signal of traveling wave can be gathered, and is transmitted
Afield travelling wave ranging analytical equipment.Travelling wave signal harvester is as shown in Figure 2.It adopts solar panel to generate electricity and provides dress
Power supply is put, remaining electricity is stored in battery.It is by the shaft tower that is installed in below transmission line of electricity, gathering transmission line malfunction
When traveling wave jump signal.
Synchronization Clock of the traveling wave harvester with wireless communication apparatus and global location, package unit in Fig. 2
It is powered by solar panel and subsidiary battery.The features such as with simple, economy, strong antijamming capability, adapt to
The severe operating environment in field.The voltage x current travelling wave signal for collecting is sent to wireless telecommunications system the travelling wave signal of main website
Analytical equipment, the exact position that comprehensive analysis failure occurs.The device has following features：
1) install, it is easy to maintenance, by field detection mode gather signal, without the need for accessing power system primary side, it is to avoid
The equipment such as traditional PT, CT install the impact caused to operation of power networks, and regular maintenance is convenient to；
2) with extremely strong adaptability, it is applied to overhead transmission line, buried cable and overhead transmission line and mixes with buried cable
Etc. various complicated line modes；
3) double collections of electric current, voltage traveling wave signal are realized, can be provided most comprehensively, accurately, in high precision for fault localization
Signal support；
4) low-power consumption and flexible power supply mode, the environment remote for field etc., the solar panels carried using device
The power consumption requirements of its day-to-day operation can be met, for Urban Underground circuit etc. can power taking on the spot, it is easy to accomplish.
Based on both-end traveling wave fault location principle, using touchless travelling wave signal harvester and data communication system
System, constitutes the 110kV urban distribution network fault localization systems that the present invention is measured based on broad sense.The range-measurement system will be built-in distributed
Global positioning system, the markers for enabling TSD total system down data unifies, and further improves the precision and reliability of fault localization
Property.System composition situation is illustrated in fig. 3 shown below.
The electric network fault range-measurement system is made up of Three Tiered Network Architecture, respectively by distributed sample terminal, communication network with
And comprehensive analysis studies and judges center composition, distributed sample terminal is uploaded to by gathering fault traveling wave information by communication network layer
Server, Integrated Analyses Center realizes the T wiring of complicated urban distribution network by the way that the information that each sampling terminal is uploaded is analyzed
The fault localization on road.It is made up of three parts, and prepositive communication computer is responsible for completing stipulations conversion, by system and the number of acquisition terminal
According to interface, server is sent data to.Server is responsible for processing and analyze data, its built-in T links Fault Location Algorithm,
Data channel, interface SCADA system are provided；Work station is responsible for the graphics process of user interface and shows function.Each layer system exists
Distribution situation in electrical network is as shown in Figure 4.
Each distributed sample terminal be mainly arranged in the shaft tower and shaft tower of the first and last end of circuit and the T contacts of circuit with
At cable connection, it is responsible for the collection of fault traveling wave signal when line fault occurs.Each sampling terminal unifies time service using GPS, protects
The height reliability of data is demonstrate,proved.Using GPRS communication networks, with transfer rate height (115kb/s), IP agreement, resource are supported
Utilization rate is high, the features such as with low cost.
110kV urban distribution network T links fault localization is mainly differentiated by fault branch and abort situation calculates two parts
Realize, as shown in Figure 5.The differentiation of fault branch with it is all upload band when target data terminal determine fault zone, according to when
Between the initial traveling wave of the sequence each failure of detection monitoring point, the Network topology in combination failure region, you can failure judgement is located
Branch road.Abort situation is calculated on the basis of the markers of fault branch two ends, combination failure branch road line parameter circuit value, using both-end traveling wave
Fault localization is theoretical, you can to calculate position of failure point.
Know from Fig. 5, if K1And K2It is equal to the electrical distance at circuit C points at 2 points, if K1Break down at point, use
Traditional fault analytical method carries out whether line fault range finding is located at K1Or K2There is difficulty at point, this is due to K1And K22 points
Electrical distance to circuit top is equal, fault analytical method cannot failure judgement there is wherein branch road, be thus fortune inspection personnel
Find failure in time and carry out breakdown repair to bring difficulty, travelling wave ranging rule is not affected by electric branch circuit branch completely.
If K between circuit C, D1There is singlephase earth fault in place, fault traveling wave can be with the light velocity from K1Place be sent to M as depicted, N, C,
D, A, B respectively hold, and by judging circuit T contacts and first and last end position that the initial wave head of traveling wave arrives at, can learn that traveling wave is transmitted
It is most short compared with the time at M, N, A, B at remaining end points to C, D two ends, therefore can be concluded that failure occurs the branch road between C, D；Exist again
C, D two ends can calculate K with traveling wave Two-terminal Fault Location theory1The physical location of failure at point.If in the same manner in K2Place's event
Barrier, it is most short compared with the time at remaining M, D, N, B end points that traveling wave is sent to A, C two ends, therefore can determine that failure occurs at A, C；Again with
With the physical location of failure judgement by Two-terminal Fault Location based on this.
Induction type voltage traveling wave acquisition terminal is the weight of the distributed sample terminal of 110kV T link fault localization systems
Part is wanted, the seizure and collection of main responsible 110kV T wiring faults range finding travelling wave signal.Due to traveling wave signal transmission speed
Degree is fast, and the present invention can delicately gather travelling wave signal using the sample frequency of 2MHz.Equal GP configuring S of each harvester, can lead to
Target malfunction monitoring data when wireless network uploads unified are crossed, while having fault logging function, impact can be automatically recorded and be rung
The information answered.Harvester mainly has following functions：
1) electromagnetic induction principle is utilized, by the way of the detection of field, contactless mode is adopted to grid equipment and circuit,
Power failure installation equipment is avoided to impact user.
2) field intensity detection is only carried out, i.e. detection signal impact and impact strength, does not detect specifically electric during failure
Pressure and current values, the reliability with height and sensitivity.
3) voltage traveling wave detection is carried out, it is possible to resolve the T junction None- identified traveling waves that conventional current traveling wave detector is faced
The problem in direction.
4) using the high frequency sample frequency of 2MHz, compared with the sample frequency of several kHz of traditional measurement mode, without the need for volume
Outer installation traveling wave measuring equipment, the sample frequency of 2MHz can fully meet the demand of traveling wave.
5) harvester is put into operation and installed using asymmetrical three-phase, due to there is stable asymmetrical component during normal operation,
Thus can judge into row line to put into operation.
Induction type voltage traveling wave harvester in addition to function above feature, also with following application characteristic：
1) it is easy to install, and easily promote：Equipment install, safeguard do not affect circuit charging operation (traditional terminal transformer by
In primary side serial or parallel connection is needed in terminating circuit, installation, maintenance need power operation)；In existing FTU, DTU etc. eventually
At the node of end equipment, can the existing monitoring terminal of renovation and utilization executing agency, only need to update its controller, easily promote.
2) impact strength detection：Detection signal impact strength, low-cost equipment can just realize high-quality monitoring, hold
Easily realize.
3) device energy-wasting is low, it is possible to achieve self-powered：Device carries solar panel, coordinates miniature energy storage device, takes
Electricity is convenient, and power consumption is low, can work long hours in various complicated adverse circumstances.
4) installation cost is low：Without the need for additionally increasing the measurement equipment with traveling wave, and the section of existing acquisition terminal can be utilized
Directly transformation can just realize high quality detection to point.
The present invention is applied to carried research method and is verified analysis by taking certain electrical network as an example.Certain electrical network is located at Shandong electricity
The northeast of net, is connected by 5 500kV circuits with net is saved, existing 110kV and 165, above transformer station in net, 110kV levels
Above transmission line of electricity 288, carries the power supply task in certain area of 14 counties and cities.
Specifically choose two T wiring waypoints in certain electrical network 110kV actual track structures, T as shown in Figure 61And T2Point.
In figure, first station is 220kV transformer stations, and second station, the third station and fourth station are 110kV transformer stations, the third stop spacing T1Point 10.6km, in figure
Circuit, transformer impedance numerical value are perunit value.
220kV first station is connected by 110kV outlets with 110kV second station, two circuit T contacts is had, in T1Pass through at point
Circuit 4 is connected to the third station, in T2Fourth station is connected to by circuit 5 at point, line construction is as shown in Figure 6 with parameter.
When there is A phase ground short circuit failures at the third station of distance 0.7km at circuit 4, said by taking voltage traveling wave as an example
Bright, the primary fault traveling wave of each distributed Voltage traveling wave harvester collection uploads markers and is respectively：First station 10.083ms, T1Point
Place 10.015ms, T210.021ms, second station 10.104ms, the third station 10.017ms and fourth station 10.046ms at point.By using front
Fault branch diagnostic method described in face, it is evident that can be determined that failure occurs in T1Between point and the third station.Combination failure branch road is joined
Number, fault localization system can calculate the station of fault distance third for 0.697km, essence with actual failure scene closely
Degree can reach more than 99%.
Table 1 is range measurement when there is different faults type at the 0.7km of the third station of distance.Wherein, with respect to range error
Calculating formula is
Table 1 shows that inventive algorithm is applied to single loop line different faults type, and precision is higher.
The range measurement of the transmission line of electricity different faults type of table 1
The traveling wave information that the T link fault localization systems measured based on broad sense are gathered by distributed sample terminal, should
Can preferably be realized connecing the range finding of branch road complex fault containing T with both-end traveling wave fault location principle, and be adapted to live severe
Complex environment, range accuracy is higher, is easily affected larger grade to have by transition resistance than traditional fault analytical method wider array of
Adaptability, by the input test in certain electrical network the fault localization of complicated line construction, easily low cost and peace can be effectively carried out
Dress and popularization and application.
The present invention adopts the failure measured based on broad sense for the T link fault localization problems in 110kV area power grids
Range-measurement system carries out distance-finding method research.The method is based on Two-terminal Fault Location principle, using touchless distributed sensing
Formula voltage traveling wave harvester gathers traveling wave information, and based on electromagnetic induction principle intensity detection is carried out, high, clever with sample frequency
The features such as sensitivity is high, range accuracy is high and easy to install, for the quick fault location of electrical network patrol officer and can carry out failure
Repairing provides important reference.The system cost is low, and without the need for extra increasing traveling wave measuring equipment is matched somebody with somebody, and can utilize existing collection
Directly transformation can be realized the terminal devices such as the node of terminal such as FTU, DTU, it is to avoid the impact of transition resistance, with more preferable
Range accuracy, for improve area ground electrical network power supply reliability there is important effect.Entered by T links actual to electrical network
Row analysis, demonstrates correctness and validity that the present invention puies forward aspect.
Additionally, the present invention puies forward range-measurement system and although method is aimed at the T links of 110kV electrical networks and carries out failure survey
Away from, but it is also applicable to the fault localization problem of the urban power distribution network of other grades such as 10kV.Thus, present system method
Fault location and repairing are carried out rapidly for distribution fortune inspection personnel are improved, and customer power supply is recovered in time and provides effective approach,
With good engineering significance.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (8)
1. a kind of area power grid T link fault localization systems measured based on broad sense, is characterized in that：Including distributed sample end
End, communication network and travelling wave ranging analysis center, wherein, the distributed sample terminal is arranged on the nothing at shaft tower including each
Contact voltage x current traveling wave harvester, the mutation letter of the non-contact voltage current traveling wave harvester collection traveling wave
Number, and being passed through the travelling wave ranging analysis center that communication network is uploaded to main website, travelling wave ranging analysis center is whole by each sampling
The information that end uploads, on the basis of the markers of fault branch two ends, combination failure branch road line parameter circuit value is surveyed using both-end traveling wave fault
Away from theory, position of failure point is calculated, realize the fault localization of the T links of electrical network.
2. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：Non-contact voltage current traveling wave collection dress be arranged in the shaft tower of the first and last end of circuit and the T contacts of circuit and
At shaft tower and cable connection, it is responsible for the collection of fault traveling wave signal when line fault occurs.
3. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：The non-contact voltage current traveling wave harvester, including wireless communication module and synchronised clock module, traveling wave collection dress
Put and be powered by solar panel.
4. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：Equal GP configuring S of the non-contact voltage current traveling wave harvester, target failure prison when uploading unified by wireless network
Survey data.
5. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：The non-contact voltage current traveling wave harvester is installed using asymmetrical three-phase.
6. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：The travelling wave ranging analysis center includes prepositive communication computer, server and work station center, and the prepositive communication computer has been responsible for
Into stipulations conversion, by system and the data-interface of acquisition terminal, server is sent data to, server is responsible for processing and is divided
Analysis data, its built-in T links Fault Location Algorithm, there is provided data channel, interface SCADA system；It is responsible for use in work station center
The graphics process at family interface and displaying function.
7. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：Differentiation of the travelling wave ranging analysis center to fault branch determines faulty section with the terminal of target data during all upload bands
Domain, according to time-sequencing the monitoring point of the initial traveling wave of each failure, the Network topology in combination failure region are detected, you can judged
The branch road of guilty culprit.
8. a kind of area power grid T link fault localization systems measured based on broad sense as claimed in claim 1, its feature
It is：The travelling wave ranging analysis center is analyzed using both-end travelling wave ranging principle, is arrived separately at using failure initial row ripple
The time at faulty line two ends, realize the range finding of trouble point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611204956.9A CN106646133A (en) | 2016-12-23 | 2016-12-23 | Regional power grid T line fault range-finding system based on generalized measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611204956.9A CN106646133A (en) | 2016-12-23 | 2016-12-23 | Regional power grid T line fault range-finding system based on generalized measurement |
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| CN108152661A (en) * | 2017-11-15 | 2018-06-12 | 贵州电网有限责任公司 | Looped network cable initial failure early warning and alignment system and method based on transient disturbance |
| CN108287293A (en) * | 2018-01-11 | 2018-07-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method and system directly acquiring fault traveling wave |
| CN110752943A (en) * | 2019-09-24 | 2020-02-04 | 国电南瑞科技股份有限公司 | Distributed fault diagnosis system and method for power transmission line |
| CN110850235A (en) * | 2019-11-27 | 2020-02-28 | 广东电网有限责任公司 | Multi-terminal positioning algorithm and positioning system based on cable topology and fault transient traveling wave |
| CN110954781A (en) * | 2019-12-10 | 2020-04-03 | 广西电网有限责任公司河池供电局 | Double-end traveling wave fault positioning method and system based on transient current of ground potential end |
| CN114094712A (en) * | 2022-01-17 | 2022-02-25 | 武汉品迅科技有限公司 | Intelligent switch feeder terminal with traveling wave ranging function |
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| CN110954781A (en) * | 2019-12-10 | 2020-04-03 | 广西电网有限责任公司河池供电局 | Double-end traveling wave fault positioning method and system based on transient current of ground potential end |
| CN114094712A (en) * | 2022-01-17 | 2022-02-25 | 武汉品迅科技有限公司 | Intelligent switch feeder terminal with traveling wave ranging function |
| CN117929928A (en) * | 2024-03-21 | 2024-04-26 | 高唐县恒诚建筑工程有限公司 | Circuit updating and fault detection method, system and medium based on Internet of things |
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