CN105353275A - Economic 66kV band multi-branch line fault positioning method and system - Google Patents

Economic 66kV band multi-branch line fault positioning method and system Download PDF

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Publication number
CN105353275A
CN105353275A CN201510871212.1A CN201510871212A CN105353275A CN 105353275 A CN105353275 A CN 105353275A CN 201510871212 A CN201510871212 A CN 201510871212A CN 105353275 A CN105353275 A CN 105353275A
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fault
line
traveling wave
current
backbone
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CN201510871212.1A
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CN105353275B (en
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刘玉成
吕礼鹏
王鹏
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杭州务实科技有限公司
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Abstract

The invention discloses an economic 66kV band multi-branch line fault positioning method and system. According to the technical solution, the economic 66kV band multi-branch line fault positioning method is characterized by comprising the following steps: a) calculating the distances between a fault point and measurement points at two ends of a line by using the absolute time difference of current transient fault components sensed at two ends of a trunk line, thus realizing double-end traveling wave fault ranging; and b) respectively measuring the current traveling wave at the two ends of the trunk line and the current traveling wave on branch lines, and superposing the current traveling wave acquired at the two ends of the trunk line and the current traveling wave acquired at the branch lines to reduce real current traveling wave of the trunk line, thus accurately positioning a trunk line fault.

Description

A kind of economical 66kV is with multipoint line Fault Locating Method and system
Technical field
The present invention relates to a kind of economical 66kV and be with multipoint line Fault Locating Method and device.
Background technology
The electric pressure distribution line that 66kV circuit extensively exists as north of China, be characterized in that transmission distance is long, the region of process along the line is wide, and geographical environment is complicated, and the help of the position of failure point not relying on fault locator to provide will find trouble spot to be tantamount to look for a needle in a haystack.Therefore, accurate localization of fault seems be even more important for searching of abort situation after 66kV line failure.Fault locator is also called fault location device, is the aut.eq. that a kind of electric parameters according to 66kV circuit measures position of failure point.It can judge trouble spot quickly and accurately according to different fault characteristics, and Timeliness coverage insulation hidden danger, plays very important effect to failture evacuation.
66kV circuit is the highest voltage level circuit in power distribution network, has the many differences being significantly both different from 35kV and following distribution line also different more than 110kV high-tension line.The earthing detection equipment that below 35kV distribution line is conventional has grounding line selection device, phase-to-ground fault detection system, earth-fault indicator, and these three kinds of modes are not exclusively applicable to 66kV line fault location.Be widely used in the location technologies such as the impedance method of more than 110kV transmission line of electricity, traveling wave method and be also difficult to application because 66kV lines branch is many and circuit is provided with a large amount of substation transformer.
Be widely used in the accurate Fault Location Algorithm research of the location technologies such as the impedance method of more than 110kV transmission line of electricity, traveling wave method, if can solve because 66kV lines branch is many and circuit is provided with a large amount of substation transformer thus the technical barrier of the location interference caused, rapidly and accurately fault localization is carried out to 66kV circuit, not only to repairing in time circuit and ensureing that reliable power supply is most important, and to the safety and stability of electric system and economical operation also significant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of economical 66kV and is with multipoint line Fault Locating Method and system.
For solving the problem, technical scheme of the present invention comprises economical 66kV and is with multipoint line Fault Locating Method, and it is characterized in that, method is as follows:
A) distance between the mathematic interpolation trouble spot utilizing backbone two ends to experience the absolute time of current temporary state fault component to circuit two ends measurement point, thus realize both-end traveling wave fault location;
B) current traveling wave on the current traveling wave at backbone two ends and place branched line thereof is measured respectively, the current traveling wave of the current traveling wave collect backbone two ends and each branched line collection carries out superposition process, the real current ripple of reduction backbone is capable, thus accurately locates backbone fault.
A kind of economical 66kV is with multipoint line fault location system, comprising: row ripple Acquire and process device, distributed fault position-indicating device, main station system; Described row ripple Acquire and process device is installed on basic routing line two ends respectively, carries out accurate fault location to basic routing line; Described distributed fault position-indicating device is installed on branched line respectively, carries out section localization of fault to branched line; Described distributed fault position-indicating device, between row ripple Acquire and process device and main station system, carry out communication with TCP/IP network.
Described economical 66kV is with multipoint line fault location system, it is characterized in that: described row ripple Acquire and process device, distributed fault position-indicating device are all with current transformer.
One of the present invention economical 66kV line fault localization method and system, both having solved existing Traveling wave fault location system can only to without branched line fault point, also solves existingly to install localization of fault indicating device at each lines branch and come accurate locating lines branch but backbone searched to the deficiency still needing long distance time line walking.Wherein, distributed fault position-indicating device carries out section localization of fault to branched line, row ripple Acquire and process device carries out accurate fault location to basic routing line, main station system has fault analysis, statistics and the function such as Remote configuration and diagnosis, especially correct for the impact of each branched line on the capable ripple of basic routing line, thus 66kV circuit backbone fault is accurately located.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1,2 is row ripple Acquire and process Plant arrangement schematic diagram of the present invention;
Fig. 3 is that entire system of the present invention arranges schematic diagram.
Embodiment
The economical 66kV of one of the present invention is with multipoint line Fault Locating Method and system, when line-internal breaks down, gushes caused current temporary state fault component at circuit two ends by experiencing by fault initial row wave.Obviously, circuit two ends occur that the time of current temporary state fault component is fault initial row wave and is rushed to the time of coming, distance between the mathematic interpolation trouble spot that basic routing line two ends (unified clock must be had) therefore can be utilized to experience the absolute time of current temporary state fault component to circuit two ends measurement point, thus realize both-end traveling wave fault location.
The basic routing line of 66kV circuit is usually long, can reach more than 200 kilometer.Both-end traveling wave fault location accurately can be positioned to the trouble spot of circuit, and range error controls within ± 300m, thus no longer needs long-time long distance line walking to find trouble spot.Therefore, if a 66kV circuit does not have branch, then only need install row ripple Acquire and process device respectively to carry out locating lines fault be more feasible method at the two ends of circuit.Circuit as shown in Figure 1, if the circuit that bus M runs does not have branched line, only at bus S, R place installed rows ripple Acquire and process device, can realize out of order location in circuit SR section.
For the T-shaped 66kV circuit of band multiple-limb, if only install two covers (as S, R end) device, then, during the upper any point fault of another branch line (MT1 or MT2 or MT3), measurement result seems all that fault occurs on M contact.Solution has two kinds, and a kind of is at every one end (S, M, R, T1, T2, T3) of circuit all installed rows ripple Acquire and process devices, just will can measure any point location of fault on circuit, as shown in Figure 2.But row ripple Acquire and process device not only involves great expense, and row ripple Acquire and process device is subject to the interference of other branched lines when gathering the current traveling wave of fault branch circuit and ripple line distortion causes finding range unsuccessfully.Although T-shaped 66kV circuit backbone is very long, the length of branched line is no more than 10 kilometers usually.The localization of fault scheme that (key problem in technology one) the present invention adopts is the basic routing line two ends installed rows ripple Acquire and process device of the T-shaped 66kV circuit at band multiple-limb, and installs distributed fault position-indicating device on each branch.Fault on each branched line is located by the distributed fault position-indicating device that each branch installs, and be not subject to the fault effects of other branched lines or backbone, the fault of backbone is then accurately located by row ripple Acquire and process device, as shown in Figure 3.(key problem in technology two) described row ripple Acquire and process device and distributed fault position-indicating device are all with current transformer, in ranging process, utilize on row ripple Acquire and process device with current transformer measure the current traveling wave of backbone, on distributed fault position-indicating device with current transformer measure current traveling wave on its place branched line, the ripple that the capable ripple of backbone real current that row ripple Acquire and process device collects is actually each branched line current traveling wave of superposition is capable, the current traveling wave that the row ripple Acquire and process device that main station system is installed circuit two ends collects removes the superposition process of the current traveling wave that each branched line produces, the real current ripple of reduction backbone is capable thus accurately locate backbone fault.
System of the present invention also comprises main station system, main station system has fault analysis, statistics and the function such as Remote configuration and diagnosis, especially correct for the impact of each branched line on the capable ripple of basic routing line, thus 66kV circuit backbone fault is accurately located.Described distributed fault position-indicating device and carry out communication with TCP/IP network between row ripple Acquire and process device and main station system, passage can adopt optical fiber or 3G wireless network etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., be all included within protection scope of the present invention.

Claims (3)

1. economical 66kV is with a multipoint line Fault Locating Method, and it is characterized in that, method is as follows:
A) distance between the mathematic interpolation trouble spot utilizing backbone two ends to experience the absolute time of current temporary state fault component to circuit two ends measurement point, thus realize both-end traveling wave fault location;
B) current traveling wave on the current traveling wave at backbone two ends and place branched line thereof is measured respectively, the current traveling wave of the current traveling wave collect backbone two ends and each branched line collection carries out superposition process, the real current ripple of reduction backbone is capable, thus accurately locates backbone fault.
2. an economical 66kV is with multipoint line fault location system, economical 66kV according to claim 1 is with multipoint line Fault Locating Method to realize, it is characterized in that, comprising: row ripple Acquire and process device, distributed fault position-indicating device, main station system;
Described row ripple Acquire and process device is installed on basic routing line two ends respectively, carries out accurate fault location to basic routing line;
Described distributed fault position-indicating device is installed on branched line respectively, carries out section localization of fault to branched line;
Described distributed fault position-indicating device, between row ripple Acquire and process device and main station system, carry out communication with TCP/IP network.
3. economical 66kV according to claim 2 is with multipoint line fault location system, it is characterized in that: described row ripple Acquire and process device, distributed fault position-indicating device are all with current transformer.
CN201510871212.1A 2015-12-02 2015-12-02 A kind of economical 66kV bands multipoint line Fault Locating Method and system Expired - Fee Related CN105353275B (en)

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