CN106989709A - A kind of transmission line of electricity line length method of calibration based on failure measured data - Google Patents
A kind of transmission line of electricity line length method of calibration based on failure measured data Download PDFInfo
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- CN106989709A CN106989709A CN201710204850.7A CN201710204850A CN106989709A CN 106989709 A CN106989709 A CN 106989709A CN 201710204850 A CN201710204850 A CN 201710204850A CN 106989709 A CN106989709 A CN 106989709A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 230000005611 electricity Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000003292 diminished effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 7
- 235000013399 edible fruits Nutrition 0.000 description 4
- 230000004807 localization Effects 0.000 description 4
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- Locating Faults (AREA)
Abstract
The present invention relates to a kind of transmission line of electricity line length method of calibration based on failure measured data, belong to Relay Protection Technology in Power System field.The inventive method step is：After transmission line of electricity MN breaks down, fault current traveling wave propagates to bus M measuring ends；The fault current traveling wave of circuit MM measuring ends is gathered by traveling wave fault location device, and the initial traveling wave Mintrop wave head of record failure, opposite end bus back wave wave head and trouble point back wave wave head reach the time of measuring end respectively, the time difference sum of opposite end bus back wave wave head and trouble point back wave wave head respectively with the initial traveling wave Mintrop wave head of failure is sought again, and finally circuit MN total length is verified using experience velocity of wave.The present invention verifies transmission line length using based on failure measured data, then the line length that calculating is used can be made closer to actual track length, distance measurement result error is diminished.
Description
Technical field
The present invention relates to a kind of transmission line of electricity line length method of calibration based on failure measured data, belong to power system relay
Protection technique field.
Background technology
At present, it according to the nominal range during construction of line is line length, but transmission line length that the length of transmission line of electricity, which is,
Can be elongated with run time, need to use the length of transmission line of electricity in traveling wave fault location, can increase if with nominal length
Distance measurement result error, then need to recalculate line length.
The content of the invention
It is present for solving the invention provides a kind of transmission line of electricity line length method of calibration based on failure measured data
Transmission line length is fixed, and makes the problem of fault localization resultant error increases.
The technical scheme is that：A kind of transmission line of electricity line length method of calibration based on failure measured data, the side
Method is comprised the following steps that：
S1, for transmission line of electricity MN, traveling wave ranging device is installed in the transformer station being only connected with bus M, as transmission line of electricity MN
After breaking down, fault current traveling wave propagates to bus M measuring ends TA1, circuit MM amounts are gathered by traveling wave fault location device
Survey end TA1Fault current traveling wave, and it is anti-to record the initial traveling wave Mintrop wave head of failure, opposite end bus back wave wave head and trouble point
Ejected wave wave head arrives separately at measuring end TA1Time, be designated as respectivelyt 1、t 2、t 3；
S2, the initial traveling wave Mintrop wave head of failure obtained according to step S1 reach measuring end TA1Timet 1, opposite end bus back wave
Wave head reaches measuring end TA1Timet 2Measuring end TA is reached with trouble point back wave wave head1Timet 3, ask respectivelyt 2、t 3Witht 1Time difference, then two time differences are summed, obtained∆t=（t 2 -t 1）+（t 3 -t 1）；
S3, using experience velocity of wave circuit MN total length is verified.
The formula that is verified using experience velocity of wave to circuit MN total length is：l=v·∆t/2；WhereinlFor circuit
MN total lengths,vFor experience velocity of wave.
The beneficial effects of the invention are as follows：Present transmission of electricity length is length when being defaulted as the construction of line, but with fortune
Row time, line length can increase, if being directly used in fault localization, can increase range error, the present invention is using real based on failure
Data check transmission line length is surveyed, then the line length that calculating is used can be made closer to actual track length, make distance measurement result error
Diminish.
Brief description of the drawings
Fig. 1 is transmission line of electricity MN system construction drawings of the present invention（F is trouble point）；
Fig. 2 is transmission line of electricity MN of the present invention fault current traveling wave grid chart；
Fig. 3 is the fault current traveling wave figure of the embodiment of the present invention 1；
Fig. 4 is the fault current traveling wave figure of the embodiment of the present invention 2.
Embodiment
Embodiment 1：10 seconds October 3 day 13 point 30 minute in 2013, certain circuit II times C phases broke down, and circuit MN reference is long
Spend for 93.1km（The length during construction of line）, the traveling wave ranging device sample rate that circuit M sides are installed is 1MHz, circuit MN II
Return C phase fault current traveling waves as shown in Figure 3.
Circuit MM measuring ends TA is gathered by traveling wave fault location device1Fault current traveling wave, and record failure respectively
Initial traveling wave Mintrop wave head, opposite end bus back wave wave head and trouble point back wave wave head reach measuring end TA1At the time of, respectively
It is designated ast 1、t 2、t 3, i.e.,t 1=0.887260s,t 2=0.887280s,t 3=0.887873s。
The time difference of opposite end bus back wave wave head and trouble point back wave wave head respectively with the initial traveling wave Mintrop wave head of failure
Sum is asked for：∆t=（t 2 -t 1）+（t 3 -t 1）= t 3+ t 2-2t 1=0.0003165s。
According to formulal= v·∆t/2= v·(t 3+ t 2-2t 1)/2 carry out the verification of line length, calculatel=94.3km,v
Experience velocity of wave is taken as, size is 2.98 × 108m/s；More than the reference length 93.1km of circuit, error is 1.2km, the measurement knot
Length when fruit is than the construction of line is longer, fault localization is calculated the line length used closer to actual track length, makes ranging knot
Fruit error diminishes.
Embodiment 2：29 seconds Mays 12 day 17 point 06 minute in 2012, certain circuit C phases broke down, and circuit MN reference length is
41.3km（The length during construction of line）, the traveling wave ranging device sample rate that circuit M sides are installed is 1MHz, circuit MN C phases event
Hinder current traveling wave as shown in Figure 4.
Circuit MM measuring ends TA is gathered by traveling wave fault location device1Fault current traveling wave, and record failure respectively
Initial traveling wave Mintrop wave head, opposite end bus back wave wave head and trouble point back wave wave head reach measuring end TA1At the time of, respectively
It is designated ast 1、t 2、t 3, i.e.,t 1=0.411582s,t 2=0.411684s,t 3=0.411780s。
The time difference sum of opposite end bus back wave wave head and trouble point back wave wave head respectively with initial traveling wave Mintrop wave head
Ask for：∆t=（t 2 -t 1）+（t 3 -t 1）= t 3+ t 2-2t 1=0.000150s。
According to formulal= v·∆t/2= v·(t 3+ t 2-2t 1)/2 carry out the verification of line length, calculatel=44.7km,v
Experience velocity of wave is taken as, size is 2.98 × 108m/s；More than the reference length 41.3km of circuit, error is 3.4km, the measurement knot
Length when fruit is than the construction of line is longer, fault localization is calculated the line length used closer to actual track length, makes ranging knot
Fruit error diminishes.
Above in conjunction with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from the knowledge that those of ordinary skill in the art possess
Put that various changes can be made.
Claims (2)
1. a kind of transmission line of electricity line length method of calibration based on failure measured data, it is characterised in that：The specific step of methods described
It is rapid as follows：
S1, for transmission line of electricity MN, traveling wave ranging device is installed in the transformer station being only connected with bus M, as transmission line of electricity MN
After breaking down, fault current traveling wave propagates to bus M measuring ends TA1, circuit MM amounts are gathered by traveling wave fault location device
Survey end TA1Fault current traveling wave, and it is anti-to record the initial traveling wave Mintrop wave head of failure, opposite end bus back wave wave head and trouble point
Ejected wave wave head arrives separately at measuring end TA1Time, be designated as respectivelyt 1、t 2、t 3；
S2, the initial traveling wave Mintrop wave head of failure obtained according to step S1 reach measuring end TA1Timet 1, opposite end bus back wave
Wave head reaches measuring end TA1Timet 2Measuring end TA is reached with trouble point back wave wave head1Timet 3, ask respectivelyt 2、t 3Witht 1Time difference, then two time differences are summed, obtained∆t=（t 2 -t 1）+（t 3 -t 1）；
S3, using experience velocity of wave circuit MN total length is verified.
2. the transmission line of electricity line length method of calibration according to claim 1 based on failure measured data, it is characterised in that：Institute
Stating the formula verified using experience velocity of wave to circuit MN total length is：l=v·∆t/2；WhereinlFor circuit MN total lengths,vFor
Experience velocity of wave.
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| CN201710204850.7A CN106989709A (en) | 2017-03-31 | 2017-03-31 | A kind of transmission line of electricity line length method of calibration based on failure measured data |
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| CN201710204850.7A CN106989709A (en) | 2017-03-31 | 2017-03-31 | A kind of transmission line of electricity line length method of calibration based on failure measured data |
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| CN106989709A true CN106989709A (en) | 2017-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726905A (en) * | 2019-10-15 | 2020-01-24 | 武汉三相电力科技有限公司 | Method and system for determining cable position based on cable length |
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2017
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| CN101923139A (en) * | 2010-04-19 | 2010-12-22 | 昆明理工大学 | Intelligent method for single-ended traveling wave fault location of power transmission line |
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| CN102253310A (en) * | 2011-05-18 | 2011-11-23 | 昆明理工大学 | Method for identifying property of second wave head during fault location of alternating-current power transmission line |
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| CN110726905A (en) * | 2019-10-15 | 2020-01-24 | 武汉三相电力科技有限公司 | Method and system for determining cable position based on cable length |
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