CN104808088A - Lightning shielding failure and counterattack recognition method based on lightning positioning system records and circuit travelling wave data - Google Patents
Lightning shielding failure and counterattack recognition method based on lightning positioning system records and circuit travelling wave data Download PDFInfo
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Abstract
The invention discloses a lightning shielding failure and counterattack recognition method based on lightning positioning system records and circuit travelling wave data. The method includes calculating a shielding failure critical current amplitude according to an electric model of a electric transmission line tower; when an electric transmission line is struck by lightning, calculating time differences between a wave arrival moment acquired by the measuring end of a travelling wave distance measuring device and multiple lightning stroke record moments of a lightning positioning system, extracting a lightning current amplitude of a lightning stroke record corresponding to the minimum value of the time differences, comparing the lightning current amplitude with the shielding failure critical current amplitude, and if the lightning current amplitude is larger than the shielding failure critical current amplitude, determining counterattack, or otherwise, determining shielding failure. The lightning shielding failure and counterattack recognition method has the advantages that lightning shielding failure and counterattack recognition can be completed through direct use of the lightning positioning system records and the circuit travelling wave data, and digital signal processing of waveforms is not needed, so that the method is simple; judgment results are consistent with fault line patrol records, and accuracy and reliability are high.
Description
Technical field
The present invention relates to a kind of thunderbolt based on lightning location system record and the capable wave datum of circuit and counterattack recognition methods, belong to Relay Protection Technology in Power System field.
Background technology
Transmission line of electricity is the important component part of electric system.Domestic and international operating experience shows, direct lightning strike is the main cause causing ultra-high-tension power transmission line to trip, therefore the safe and stable operation of lightning protection to guarantee electric system strengthening transmission line of electricity has vital role.When thunderbolt causes insulation flashover, effective identification is carried out to circuit lightning fault type, reference can be provided for lightning Protection Design, and the improvement coordinated for transmission line insulator provides foundation.
At present; theoretical research majority for shielding and counterattack rests on pole and tower design field; rely on and calculate resistance to thunder intensity and set up shaft tower geometric model judges shielding and counterattack generation by mapping, but these class methods need constantly to revise shielding angle in conjunction with operation power experience, process is comparatively complicated.Direct monitoring technology is not then had to realize the fault identification of thunderbolt and counterattack after circuit puts into operation, utilize the lightning fault recognition methods of fault transient amount zero mould and line mould ratio difference can distinguish lightning induced voltage and short trouble, but the identification problem of unresolved direct lightning strike; Engineering also once utilized the mode such as tape, magnetic link measure the method for discrimination that lightning current wave shape parameter realizes shielding and counterattack, but the workload obtaining data is large, tape, magnetic link installation site is chosen there is blindness, need make a decision according to the working experience of on-the-spot track walker, easily cause erroneous judgement and fail to judge, its subjectivity is strong, credible poor.Therefore, the recognition methods proposing a kind of be struck by lightning shielding and counterattack is badly in need of.
Summary of the invention
The object of the invention is to overcome that existing thunderbolt is not enough with counterattack recognition methods accuracy, the shortcoming of poor reliability, propose a kind of thunderbolt based on lightning location system record and the capable wave datum of circuit and strike back recognition methods.
A kind of thunderbolt based on lightning location system record and the capable wave datum of circuit that the present invention proposes with counterattack recognition methods is: first calculate shielding critical current amplitude according to the electrical model of electric power line pole tower; When transmission line of electricity is struck by lightning, the ripple calculating the acquisition of traveling wave ranging device measuring end is struck by lightning to moment and lightning location system many and records the mistiming in moment, extract the amplitude of lightning current of the corresponding thunderbolt record of minimum value of this mistiming, this amplitude of lightning current and shielding critical current amplitude are compared, if this amplitude of lightning current is greater than shielding critical current amplitude, be then judged to counterattack; Otherwise, then shielding is judged to; The steps include:
(1) shielding critical current amplitude is calculated by the electrical model of electric power line pole tower
Wherein, I
kfor shielding critical current amplitude; h
dfor the average suspension height of wire; h
bfor the average suspension height of lightning conducter; α is the inclination angle, hillside of shaft tower; θ is wire-protecting angle;
(2) when computing electric power line is struck by lightning, the lightning fault mistiming Δ t that both traveling wave ranging device and lightning location system record
m=t
1-t'
m;
Wherein, t
1lightning fault initial row ripple for traveling wave ranging device record arrives the moment of measuring junction; T'
mfor lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record arrive moment at lightning monitoring station, m=1,2,
(3) the minimum value Δ t=| Δ t of the lightning fault mistiming that both traveling wave ranging device and lightning location system record is calculated
m|
min; Extract the thunder-strike current amplitude I of the corresponding thunderbolt record of Δ t again;
(4) by the amplitude of lightning current I of the record that is struck by lightning corresponding to Δ t and shielding critical current amplitude I
kcompare, carry out the differentiation of thunderbolt and counterattack by following condition:
If | I|≤I
k, then thunderbolt is judged to be;
If | I| > I
k, then back flashover is judged to be.
Principle of the present invention is:
One, the calculating of critical lightning current
Electrical model according to electric power line pole tower calculates shielding critical current amplitude by (1) formula
In formula (1), I
kfor shielding critical current amplitude; h
dfor the average suspension height of wire; h
bfor the average suspension height of lightning conducter; α is the inclination angle, hillside of shaft tower; θ is wire-protecting angle.
Two, the calculating of lightning fault mistiming
When being struck by lightning by (2) computing electric power line, the lightning fault mistiming Δ t that both traveling wave ranging device and lightning location system record
mfor
Δt
m＝t
1-t'
m(2)
In formula (2), t
1lightning fault initial row ripple for traveling wave ranging device record arrives the moment of measuring junction; T'
mfor lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record arrive moment at lightning monitoring station, m=1,2 ...
Three, the minimum value of lightning fault mistiming calculates
The minimum value Δ t calculating the lightning fault mistiming that both traveling wave ranging device and lightning location system record by (3) formula is
Δt＝|Δt
m|
min(3)
Extract the amplitude of lightning current I of the corresponding thunderbolt record of Δ t again.
Four, the structure of thunderbolt and counterattack criterion
By the amplitude of lightning current I of the record that is struck by lightning corresponding to Δ t and shielding critical current amplitude I
kcompare, carry out the differentiation of thunderbolt and counterattack by following condition:
If | I|≤I
k, then thunderbolt is judged to be;
If | I| > I
k, then back flashover is judged to be.
The present invention compared with prior art tool has the following advantages:
1, the present invention directly uses lightning location system record and row wave datum just can complete the identification of thunderbolt and counterattack, and do not need to carry out digital signal processing to waveform, method is comparatively simple;
2, lighting location is combined with travelling wave ranging two Iarge-scale system by the present invention in the time domain, lightning current detection information and the large key element of line fault transient-wave two is utilized jointly to complete the identification of thunderbolt type, through the data verification of reality, it differentiates that result is consistent with fault line walking record, accuracy is high, and reliability is strong.
Accompanying drawing explanation
Fig. 1 is the inventive method step schematic diagram;
Fig. 2 is the Tower Model figure of the embodiment of the present invention 1 and embodiment 2;
Table 1 is lightning location system information extraction result in embodiment 1;
Table 2 is lightning location system information extraction result in embodiment 2.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.Following examples are the lightning fault that actual 220kV transmission line of electricity occurs, and the lightning fault type utilizing the inventive method to judge is consistent with the line walking result at line fault scene.
Based on thunderbolt and the counterattack recognition methods of lightning location system record and the capable wave datum of circuit, first calculate shielding critical current amplitude according to the electrical model of electric power line pole tower; When transmission line of electricity is struck by lightning, the ripple calculating the acquisition of traveling wave ranging device measuring end is struck by lightning to moment and lightning location system many and records the mistiming in moment, extract the amplitude of lightning current of the corresponding thunderbolt record of minimum value of this mistiming, this amplitude of lightning current and shielding critical current amplitude are compared, if this amplitude of lightning current is greater than shielding critical current amplitude, be then judged to counterattack; Otherwise, then shielding is judged to; The steps include:
(1) shielding critical current amplitude is calculated by the electrical model of electric power line pole tower
Wherein, I
kfor shielding critical current amplitude; h
dfor the average suspension height of wire; h
bfor the average suspension height of lightning conducter; α is the inclination angle, hillside of shaft tower; θ is wire-protecting angle;
(2) when computing electric power line is struck by lightning, the lightning fault mistiming Δ t that both traveling wave ranging device and lightning location system record
m=t
1-t'
m;
Wherein, t
1lightning fault initial row ripple for traveling wave ranging device record arrives the moment of measuring junction; T'
mfor lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record arrive moment at lightning monitoring station, m=1,2,
(3) the minimum value Δ t=| Δ t of the lightning fault mistiming that both traveling wave ranging device and lightning location system record is calculated
m|
min; Extract the thunder-strike current amplitude I of the corresponding thunderbolt record of Δ t again;
(4) by the amplitude of lightning current I of the record that is struck by lightning corresponding to Δ t and shielding critical current amplitude I
kcompare, carry out the differentiation of thunderbolt and counterattack by following condition:
If | I|≤I
k, then thunderbolt is judged to be;
If | I| > I
k, then back flashover is judged to be.
Embodiment 1:
As shown in Figure 2, model is 2240ZM1 cathead tangent tower to 220kV electric power line pole tower complete model, and its design parameter is: the average suspension height h of wire
dfor 24.0m; The average suspension height h of lightning conducter
bfor 30.5m; The hillside inclination alpha of shaft tower is 25 °; Wire-protecting angle θ is 10 °.
(1) calculating shielding critical current amplitude according to the electrical model of electric power line pole tower is:.
(2) when transmission line of electricity is struck by lightning, the ripple that traveling wave ranging device measuring end obtains is to moment t
1for 2013-09-2420:48:18.802; Lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record to arrive moment at lightning monitoring station as shown in table 1.The lightning fault recording gauge evaluation time difference Δ t that when being struck by lightning according to transmission line of electricity, both traveling wave ranging device and lightning location system record
m, the minimum value obtaining the mistiming is 2ms, and corresponding thunderbolt record is the lightning fault data of transmission line of electricity, and the amplitude of its thunder-strike current is I=-14.0kA.
(3) according to the shielding critical current amplitude calculated and thunder-strike current amplitude: | I|=14.0kA, and | I|<I
k=24.455kA, then can judge that this lightning fault is as shielding.
Embodiment 2:220kV electric power line pole tower model parameter is with the parameter in embodiment 1.
(1) shielding critical current amplitude is calculated according to the electrical model of electric power line pole tower:
(2) when transmission line of electricity is struck by lightning, the ripple that traveling wave ranging device measuring end obtains is to moment t
1for 2012-08-63:29:14.906; Lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record to arrive moment at lightning monitoring station as shown in table 2.The lightning fault recording gauge evaluation time difference Δ t that when being struck by lightning according to transmission line of electricity, both traveling wave ranging device and lightning location system record
m, the minimum value obtaining the mistiming is 1ms, and corresponding thunderbolt record is the lightning fault data of transmission line of electricity, and the amplitude of its thunder-strike current is I=-126.5kA.
(3) according to the shielding critical current amplitude calculated and thunder-strike current amplitude: | I|=126.5kA, and | I|>I
k=24.455kA, then can judge that this lightning fault is as counterattack.
Table 1
Table 2
| Time | Longitude | Latitude | Electric current (kA) | Δt m |
| 2012-08-06 03:28:43.664 | 103.4772 | 22.9383 | -22.2 | 0:00:31.242 |
| 2012-08-06 03:28:47.927 | 103.3743 | 22.9740 | -78.9 | 0:00:26.979 |
| 2012-08-06 03:28:48.011 | 103.3731 | 22.9813 | -41.9 | 0:00:26.895 |
| 2012-08-06 03:28:48.143 | 103.3741 | 22.9835 | -58.8 | 0:00:26.763 |
| 2012-08-06 03:29:06.384 | 103.3708 | 22.9797 | -45.0 | 0:00:08.522 |
| 2012-08-06 03:29:06.516 | 103.3482 | 22.9728 | -39.0 | 0:00:08.390 |
| 2012-08-06 03:29:14.905 | 103.3207 | 23.0149 | -126.5 | 0:00:00.001 |
| 2012-08-06 03:29:14.988 | 103.3345 | 23.0097 | -138.0 | -0:00:00.082 |
| 2012-08-06 03:29:15.242 | 103.2678 | 23.0510 | -27.5 | -0:00:00.336 |
| 2012-08-06 03:29:44.050 | 103.3386 | 22.9980 | -121.3 | -0:00:29.144 |
| 2012-08-06 03:29:44.094 | 103.3485 | 22.9967 | -21.8 | -0:00:29.188 |
| 2012-08-06 03:29:44.173 | 103.3243 | 22.9770 | -30.7 | -0:00:29.267 |
| 2012-08-06 03:29:44.228 | 103.3382 | 22.9912 | -45.4 | -0:00:29.322 |
| 2012-08-06 03:29:44.255 | 103.3400 | 23.0044 | -119.7 | -0:00:29.349 |
| 2012-08-06 03:29:44.561 | 103.3353 | 22.9964 | -62.2 | -0:00:29.655 |
| 2012-08-06 03:29:44.632 | 103.3344 | 23.0043 | -29.7 | -0:00:29.726 |
| 2012-08-06 03:29:44.690 | 103.3404 | 23.0010 | -26.0 | -0:00:29.784 |
| 2012-08-06 03:29:44.851 | 103.3368 | 23.0029 | -32.4 | -0:00:29.945 |
| 2012-08-06 03:29:53.815 | 103.3673 | 22.9725 | -7.4 | -0:00:38.909 |
| 2012-08-06 03:30:07.456 | 103.3102 | 23.0359 | -71.7 | -0:00:52.550 |
| 2012-08-06 03:30:07.486 | 103.3209 | 23.0214 | -18.8 | -0:00:52.580 |
| 2012-08-06 03:30:07.590 | 103.3022 | 23.0171 | -65.7 | -0:00:52.684 |
。
Claims (1)
1., based on thunderbolt and the counterattack recognition methods of lightning location system record and the capable wave datum of circuit, it is characterized in that: first calculate shielding critical current amplitude according to the electrical model of electric power line pole tower; When transmission line of electricity is struck by lightning, the ripple calculating the acquisition of traveling wave ranging device measuring end is struck by lightning to moment and lightning location system many and records the mistiming in moment, extract the amplitude of lightning current of the corresponding thunderbolt record of minimum value of this mistiming, this amplitude of lightning current and shielding critical current amplitude are compared, if this amplitude of lightning current is greater than shielding critical current amplitude, be then judged to counterattack; Otherwise, then shielding is judged to; Its step is as follows:
(1) shielding critical current amplitude is calculated by the electrical model of electric power line pole tower
wherein, I
kfor shielding critical current amplitude; h
dfor the average suspension height of wire; h
bfor the average suspension height of lightning conducter; α is the inclination angle, hillside of shaft tower; θ is wire-protecting angle;
(2) when computing electric power line is struck by lightning, the lightning fault mistiming Δ t that both traveling wave ranging device and lightning location system record
m=t
1-t'
m;
Wherein, t
1lightning fault initial row ripple for traveling wave ranging device record arrives the moment of measuring junction; T'
mfor lightning location system is at moment t
1± 1min in the violent electromagnetic field change that causes in atmosphere of the thunder and lightning of record arrive moment at lightning monitoring station, m=1,2,
(3) the minimum value Δ t=| Δ t of the lightning fault mistiming that both traveling wave ranging device and lightning location system record is calculated
m|
min; Extract the thunder-strike current amplitude I of the corresponding thunderbolt record of Δ t again;
(4) by the amplitude of lightning current I of the record that is struck by lightning corresponding to Δ t and shielding critical current amplitude I
kcompare, carry out the differentiation of thunderbolt and counterattack by following condition:
If | I|≤I
k, then thunderbolt is judged to be;
If | I| > I
k, then back flashover is judged to be.
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| CN201510223429.1A CN104808088A (en) | 2015-05-05 | 2015-05-05 | Lightning shielding failure and counterattack recognition method based on lightning positioning system records and circuit travelling wave data |
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| CN201510223429.1A CN104808088A (en) | 2015-05-05 | 2015-05-05 | Lightning shielding failure and counterattack recognition method based on lightning positioning system records and circuit travelling wave data |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105527514A (en) * | 2015-11-30 | 2016-04-27 | 北京宇航系统工程研究所 | Test method for lightning indirect effects of finished special vehicle |
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN106918762A (en) * | 2015-12-25 | 2017-07-04 | 中国电力科学研究院 | A kind of overhead transmission line thunderbolt current monitoring method and lightning fault recognition methods |
| CN107271856A (en) * | 2017-05-19 | 2017-10-20 | 国网浙江省电力公司电力科学研究院 | Overhead transmission line insulator parallel connection gaps single lightning strike protection Effective judgement method |
| CN108037413A (en) * | 2017-12-06 | 2018-05-15 | 国网山东省电力公司电力科学研究院 | Transmission line lightning stroke automatic fault diagnosis and visualization report method |
| CN108205662A (en) * | 2017-12-29 | 2018-06-26 | 国网上海市电力公司 | Power transmission line lightning shielding counterattack recognition methods based on Pearson came algorithm |
| CN113011099A (en) * | 2021-03-26 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Method for calculating and correcting lightning trip-out rate of power transmission line |
| CN115575726A (en) * | 2022-11-21 | 2023-01-06 | 昆明理工大学 | Method and system for judging multiple lightning stroke properties of power transmission line |
| CN115575783A (en) * | 2022-12-09 | 2023-01-06 | 昆明理工大学 | Multiple Lei Raoji and counterattack recognition method and system for alternating-current power transmission line |
| CN115616349A (en) * | 2022-11-30 | 2023-01-17 | 昆明理工大学 | Multi-lightning-stroke identification method and system based on multi-metadata fusion |
| CN115656732A (en) * | 2022-12-12 | 2023-01-31 | 昆明理工大学 | Method and system for identifying lightning stroke fault based on lightning impulse rate |
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| CN105527514B (en) * | 2015-11-30 | 2018-05-22 | 北京宇航系统工程研究所 | A kind of special vehicle vehicle thunder and lightning indirect effect test method |
| CN106918762A (en) * | 2015-12-25 | 2017-07-04 | 中国电力科学研究院 | A kind of overhead transmission line thunderbolt current monitoring method and lightning fault recognition methods |
| CN105911433B (en) * | 2016-06-30 | 2018-12-18 | 上海交通大学 | The recognition methods of transmission line lightning stroke type |
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN107271856A (en) * | 2017-05-19 | 2017-10-20 | 国网浙江省电力公司电力科学研究院 | Overhead transmission line insulator parallel connection gaps single lightning strike protection Effective judgement method |
| CN108037413B (en) * | 2017-12-06 | 2020-01-31 | 国网山东省电力公司电力科学研究院 | Automatic diagnosis and visual reporting method for lightning stroke fault of power transmission line |
| CN108037413A (en) * | 2017-12-06 | 2018-05-15 | 国网山东省电力公司电力科学研究院 | Transmission line lightning stroke automatic fault diagnosis and visualization report method |
| CN108205662A (en) * | 2017-12-29 | 2018-06-26 | 国网上海市电力公司 | Power transmission line lightning shielding counterattack recognition methods based on Pearson came algorithm |
| CN113011099A (en) * | 2021-03-26 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Method for calculating and correcting lightning trip-out rate of power transmission line |
| CN115575726A (en) * | 2022-11-21 | 2023-01-06 | 昆明理工大学 | Method and system for judging multiple lightning stroke properties of power transmission line |
| CN115575726B (en) * | 2022-11-21 | 2023-02-24 | 昆明理工大学 | Method and system for judging multiple lightning stroke properties of power transmission line |
| CN115616349A (en) * | 2022-11-30 | 2023-01-17 | 昆明理工大学 | Multi-lightning-stroke identification method and system based on multi-metadata fusion |
| CN115616349B (en) * | 2022-11-30 | 2023-03-14 | 昆明理工大学 | Multi-lightning stroke recognition method and system based on multi-metadata fusion |
| CN115575783A (en) * | 2022-12-09 | 2023-01-06 | 昆明理工大学 | Multiple Lei Raoji and counterattack recognition method and system for alternating-current power transmission line |
| CN115656732A (en) * | 2022-12-12 | 2023-01-31 | 昆明理工大学 | Method and system for identifying lightning stroke fault based on lightning impulse rate |
| CN115656732B (en) * | 2022-12-12 | 2023-05-23 | 昆明理工大学 | Lightning stroke fault identification method and system based on lightning stroke velocity |
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Application publication date: 20150729 |