A kind of economical 66kV bands multipoint line Fault Locating Method and system
The present invention relates to a kind of economical 66kV bands multipoint line Fault Locating Method and devices.
The voltage class distribution line that 66kV circuits are widely present as north of China, its main feature is that transmission distance is long, edge
The region that line passes through is wide, and geographical environment is complicated, and the help not against the position of failure point of fault locator offer will be found
Fault point is tantamount to look for a needle in a haystack.Therefore, lookup of the accurate fault location for abort situation after 66kV line failures
Seem and is even more important.Fault locator is also known as fault location device, is a kind of former according to the electrical quantity of 66kV circuits measurement
The automatic device of barrier point position.It can quickly and accurately judge fault point according to different fault characteristics, find that insulation is hidden in time
Suffer from, very important effect is played to troubleshooting.
66kV circuits are the highest voltage level circuits in power distribution network, are had apparent both different from 35kV and following distribution
Many differences of circuit also difference 110kV or more high-tension lines.The common earthing detection equipment of 35kV or less distribution lines connects
Ground route selection equipment, phase-to-ground fault detection system, earth-fault indicator, these three modes are not properly suited for 66kV circuits
Fault location.It is widely used in the location technologies such as impedance method, the traveling wave method of 110kV or more transmission lines of electricity also because of 66kV lines branch
Compare and a large amount of distribution transformers are installed and are difficult to apply on more and circuit.
The accurate fault localization for being widely used in the location technologies such as impedance method, the traveling wave method of 110kV or more transmission lines of electricity is calculated
Method research, if can solve because 66kV lines branch is relatively more and circuit on to be equipped with a large amount of distribution transformers fixed to caused by
The technical barrier of position interference, rapidly and accurately carries out fault localization to 66kV circuits, not only can to repairing circuit and guarantee in time
It is most important by powering, and safety and stability to electric system and economical operation are also of great significance.
The technical problem to be solved in the present invention is to provide a kind of economical 66kV band multipoint line Fault Locating Method and
To solve the above problems, technical scheme of the present invention includes economical 66kV band multipoint lines fault location side
Method, which is characterized in that method is as follows：
A) the mathematic interpolation fault point of the absolute time of current temporary state fault component is experienced using backbone both ends to line
The distance between road both ends measurement point, to realize both-end traveling wave fault location；
B) current traveling wave and the current traveling wave on the branched line of place for measuring backbone both ends respectively, by backbone both ends
Collected current traveling wave and the current traveling wave of each branched line acquisition carry out superposition processing, restore the real current row of backbone
Wave, to be accurately positioned to backbone failure.
A kind of economical 66kV bands multipoint line fault location system, including：Traveling wave acquires and processing unit, distribution
Fault location instruction device, main station system；The traveling wave acquisition is respectively arranged in basic routing line both ends with processing unit, to trunk
Circuit carries out accurate fault location；The distributed fault position-indicating device is respectively arranged on branched line, to branch line
Road carries out section fault positioning；The distributed fault position-indicating device, traveling wave acquisition and processing unit and main station system it
Between communicated with TCP/IP networks.
The economical 66kV band multipoint line fault location systems, it is characterised in that：The traveling wave acquisition and place
It manages device, distributed fault position-indicating device and carries current transformer.
A kind of economical 66kV line faults localization method and system of the present invention had both solved existing traveling wave fault and had surveyed
It can only also be solved existing in each lines branch installation fault location instruction dress to no branched line fault point away from system
It sets to be accurately positioned lines branch but still need to the deficiency of long range long-time line walking to backbone lookup.Wherein, distributed fault
Position-indicating device carries out accurate event with processing unit to branched line progress section fault positioning, traveling wave acquisition to basic routing line
Barrier positioning, main station system has the function of accident analysis, statistics and Remote configuration and diagnosis etc., in particular for each branched line
Influence to basic routing line traveling wave is corrected, to be accurately positioned to 66kV circuit backbone failures.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1,2 are that traveling wave of the invention acquires and processing unit arrangement schematic diagram；
Fig. 3 is the system general arrangement schematic of the present invention.
Specific implementation mode
A kind of economical 66kV bands multipoint line Fault Locating Method and the system of the present invention, when event occurs for line-internal
When barrier, it will be experienced at circuit both ends and gush caused current temporary state fault component by failure initial row wave.Obviously, circuit two
The time that current temporary state fault component occurs in end is that failure initial row wave is rushed to the time come, therefore can utilize backbone
The mathematic interpolation fault point of the absolute time of current temporary state fault component is experienced to line in road both ends (must have unified clock)
The distance between road both ends measurement point, to realize both-end traveling wave fault location.
The basic routing line of 66kV circuits is usually long, up to more than 200 kilometers.Both-end traveling wave fault location can accurately be determined
Position to the fault point of circuit, range error control within ± 300 m, to no longer need long-time long range line walking that can look for
To fault point.Therefore, if a 66kV circuit does not have branch, only traveling wave acquisition and place respectively need to be installed at the both ends of circuit
It is more feasible method that reason device, which carrys out positioning line fault failure,.Circuit as shown in Figure 1, if the circuit run on busbar M does not have
Branched line can only install traveling wave acquisition and processing unit at busbar S, R, realize that institute is faulty fixed in circuit SR sections
For the T-type 66kV circuits with multiple-limb, if only installing two sets（Such as the end S, R）Device, then another branch
Line（MT1 or MT2 or MT3）When upper any point failure, measurement result all seems that failure occurs on M contacts.Solution has two
Kind, one is will be in every one end of circuit（S、M、R、T1、T2、T3）The all acquisition of installation traveling wave and processing unit, can just measure line
Road any point location of fault, as shown in Figure 2.But traveling wave acquisition not only involves great expense with processing unit, and traveling wave acquires
With processing unit acquire fault branch circuit current traveling wave when easily by other branched lines interfere and wave line distortion causes to survey
Away from failure.Although T-type 66kV circuit backbones are very long, the length of branched line is typically not greater than 10 kilometers.（Key problem in technology
One）The fault location scheme that the present invention uses is adopted in the basic routing line both ends of the T-type 66kV circuits with multiple-limb installation traveling wave
Collection and processing unit, and distributed fault position-indicating device is installed on each branch.Failure on each branched line is by each point
The distributed fault position-indicating device positioning installed in branch, is not influenced by the failure of other branched lines or backbone, and is led
The failure of main line is then acquired by traveling wave and is accurately positioned with processing unit, as shown in Figure 3.（Key problem in technology two）The traveling wave acquisition
Carry current transformer with processing unit and distributed fault position-indicating device, in ranging process, using traveling wave acquisition with
The current transformer of band measures the current traveling wave of backbone in processing unit, the electric current of band on distributed fault position-indicating device
Current traveling wave on its place branched line of transformer measurement, traveling wave acquisition and the collected backbone real current of processing unit
Traveling wave be actually the superposition wave row of each branched line current traveling wave, the traveling wave that main station system installs circuit both ends adopt
The superposition that collection is removed the current traveling wave that each branched line generates with the collected current traveling wave of processing unit is handled, reduction master
The real current traveling wave of main line is to be accurately positioned backbone failure.
The system of the present invention further includes main station system, and main station system has accident analysis, statistics and Remote configuration and examines
Functions, the influence in particular for each branched line to basic routing line traveling wave such as disconnected are corrected, to 66kV circuit trunks
Line failure is accurately positioned.Between the distributed fault position-indicating device and traveling wave acquisition and processing unit and main station system
It is communicated with TCP/IP networks, optical fiber or 3G wireless networks etc. may be used in channel.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., are all included in the scope of protection of the present invention.