CN107063066B - A kind of power transmission line sag inversion method based on electric field information - Google Patents
A kind of power transmission line sag inversion method based on electric field information Download PDFInfo
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- CN107063066B CN107063066B CN201710296516.9A CN201710296516A CN107063066B CN 107063066 B CN107063066 B CN 107063066B CN 201710296516 A CN201710296516 A CN 201710296516A CN 107063066 B CN107063066 B CN 107063066B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005684 electric field Effects 0.000 title claims abstract description 12
- 230000005611 electricity Effects 0.000 claims abstract description 44
- 238000010845 search algorithm Methods 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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Abstract
The invention discloses a kind of power transmission line sag inversion method based on electric field information, the following steps are included: 1) will under normal circumstances under transmission line of electricity ground field strength data as ground field strength sample, again using the arc sag of the corresponding transmission line of electricity under normal circumstances of each ground field strength sample as the feasible solution of tabu search algorithm, taboo list is then constructed；2) ground field strength data under practical transmission line of electricity are obtained, when the error between ground field strength sample any in field strength data in ground under practical transmission line of electricity and taboo list is less than or equal to preset value, then using the ground, field strength sample corresponds to the feasible solution of tabu search algorithm as the arc sag of practical transmission line of electricity；Otherwise, then step 3) is gone to；3) the neighborhood solution of several tabu search algorithm feasible solutions is generated, then taboo list is updated, then goes to step 2), this method can be based on the arc sag of field intensity information inverting transmission line of electricity in ground under transmission line of electricity.
Description
Technical field
The invention belongs to power grid securities and maintenance technology field, and it is anti-to be related to a kind of power transmission line sag based on electric field information
Drill method.
Background technique
Arc sag is the important parameter of transmission line of electricity operation and maintenance, is related to the safety and stability of power grid, therefore, route
The size of arc sag must be within the limits prescribed in design and operation.But since transmission line of electricity will receive line load and environment temperature
The arc sag of the influence of degree, route can constantly change.Such as: route increase-volume can cause conductor temperature to increase, and lead to wire elongation, arc
It hangs down and increases；Wire icing can increase route than carrying, and arc sag is caused to increase.These factors are likely to form accident potential, therefore,
It is necessary to be verified and monitored to arc sag, to ensure the normal operation of route and be spanned the safety of object.
The open report of the correlative study of power transmission line sag monitoring at home and abroad is relatively more, such as manual inspection method, image
The technologies such as processing monitoring method, helicopter line data-logging, GPS positioning ranging monitoring method, weight method, thermometry have been widely used
In actual monitoring, but there are still deficiencies for these methods, and there are many problems during practice, such as due to route at
It is big etc. in wilderness and span, manual inspection method there are security risk and real-time it is poor；Image treating is vulnerable to extraneous and weather shadow
It rings, it is more low that the picture of helicopter routing inspection shooting still needs to eye recognition, efficiency.Therefore need to further investigate new arc sag monitoring side
Method makes up the deficiency of existing method.The variation of power transmission line sag is finally all shown in the variation of its terrain clearance.With arc
The variation for terrain clearance of hanging down, ground field strength can change therewith, therefore obtain field intensity information using ground field strength measurement technology, from
And be finally inversed by arc sag, by less field strength parameter, more accurate sag value can be obtained without changing route, and not vulnerable to
To the influence of the conditions such as ambient enviroment, meteorology, but it can not pass through ground field strength inverting power transmission line sag in the prior art
Technology.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of power transmission line based on electric field information is provided
Road arc sag inversion method, this method can be based on the arc sags of field intensity information inverting transmission line of electricity in ground under transmission line of electricity.
In order to achieve the above objectives, the power transmission line sag inversion method of the present invention based on electric field information includes following
Step:
1) ground field strength data under several transmission lines of electricity under normal circumstances are measured, then will be under normal circumstances under transmission line of electricity
Face field strength data are made as ground field strength sample, then by the arc sag of the corresponding transmission line of electricity under normal circumstances of each ground field strength sample
For the feasible solution of tabu search algorithm, then pass through the feasible destructing of each ground field strength sample and its corresponding tabu search algorithm
Build taboo list；
2) ground field strength data under practical transmission line of electricity are obtained, then by field strength data in ground under practical transmission line of electricity and are avoided
Ground field strength sample in table compares, when any ground field strength in field strength data in ground under practical transmission line of electricity and taboo list
When error between sample is less than or equal to preset value, then using the ground field strength sample correspond to the feasible solution of tabu search algorithm as
The optimal solution of search, and using the optimal solution of the search as the arc sag of practical transmission line of electricity；When ground under practical transmission line of electricity
When error in strong data and taboo list between each ground field strength sample is all larger than preset value, then step 3) is gone to；
3) feasible solution of tabu search algorithm in taboo list is changed by move function, generates several TABU search
The neighborhood solution of algorithm feasible solution, and using the neighborhood solution of the tabu search algorithm feasible solution of generation as candidate solution, then by described
Candidate solution is updated taboo list, then goes to step 2).
Taboo list is updated by the candidate solution in step 3), then goes to the concrete operations of step 2) are as follows:
3a) each candidate solution is judged by aspiration criterion, when candidate solution satisfaction despises rule, then by the candidate solution
And corresponding ground field strength is added in taboo list, then goes to step 2)；When candidate solution is unsatisfactory for despising rule, then go to
Step 3b)；
3b) by except taboo list in each candidate solution candidate solution and its corresponding ground field strength be added in taboo list, so
After go in step 2).
The expression formula of move function are as follows:
xnew=x+k* Δ x
Wherein, k=± 1, ± 2..., xnewFor the neighborhood solution of the feasible solution x of tabu search algorithm in taboo list, Δ x is to move
Dynamic unit, Δ x are the function about mobile frequency n.
The invention has the following advantages:
Power transmission line sag inversion method of the present invention based on electric field information passes through positive reason when specific operation
Under condition under transmission line of electricity ground field strength data and corresponding arc sag as the feasible solution of tabu search algorithm and its corresponding
Face field strength sample constructs taboo list, then compares the ground field strength under practical transmission of electricity transmission line of electricity in ground field strength data and taboo list
Sample compares, when the two error is less than or equal to preset value, then using the corresponding feasible solution of ground field strength sample as practical
The arc sag of power delivery circuit then generates the neighbour of several feasible solutions when the error of the two is more than or equal to preset value by move function
Domain solution, and is updated taboo list by each neighborhood solution, and finally make under practical transmission of electricity transmission line of electricity ground field strength data and
Until the error between the field strength sample of ground in taboo list is less than or equal to preset value, the arc of practical transmission line of electricity is finally searched out
It hangs down.It should be noted that it is not necessary to modify transmission lines of electricity by the present invention, accurate arc sag can be obtained by move function, realizes arc
Vertical verification and monitoring guarantees the normal operation of transmission line of electricity, safeguards the safety and stablization of power grid, has more wide application
Prospect.
Detailed description of the invention
Fig. 1 is the computation model figure of transmission of electricity guide passage power frequency electric field in the present invention；
Fig. 2 is flow chart of the invention.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Figure 1 and Figure 2, the power transmission line sag inversion method of the present invention based on electric field information includes following step
It is rapid:
1) ground field strength data under several transmission lines of electricity under normal circumstances are measured, then will be under normal circumstances under transmission line of electricity
Face field strength data are made as ground field strength sample, then by the arc sag of the corresponding transmission line of electricity under normal circumstances of each ground field strength sample
For the feasible solution of tabu search algorithm, then pass through the feasible destructing of each ground field strength sample and its corresponding tabu search algorithm
Build taboo list；
2) ground field strength data under practical transmission line of electricity are obtained, then by field strength data in ground under practical transmission line of electricity and are avoided
Ground field strength sample in table compares, when any ground field strength in field strength data in ground under practical transmission line of electricity and taboo list
When error between sample is less than or equal to preset value, then using the ground field strength sample correspond to the feasible solution of tabu search algorithm as
The optimal solution of search, and using the optimal solution of the search as the arc sag of practical transmission line of electricity；When ground under practical transmission line of electricity
When error in strong data and taboo list between each ground field strength sample is all larger than preset value, then step 3) is gone to；
3) feasible solution of tabu search algorithm in taboo list is changed by move function, generates several TABU search
The neighborhood solution of algorithm feasible solution, and using the neighborhood solution of the tabu search algorithm feasible solution of generation as candidate solution, then by described
Candidate solution is updated taboo list, then goes to step 2).
Taboo list is updated by the candidate solution in step 3), then goes to the concrete operations of step 2) are as follows:
3a) each candidate solution is judged by aspiration criterion, when candidate solution satisfaction despises rule, then by the candidate solution
And corresponding ground field strength is added in taboo list, then goes to step 2)；When candidate solution is unsatisfactory for despising rule, then go to
Step 3b)；
3b) by except taboo list in each candidate solution candidate solution and its corresponding ground field strength be added in taboo list, so
After go in step 2).
The expression formula of move function are as follows:
xnew=x+k* Δ x
Wherein, k=± 1, ± 2..., xnewFor the neighborhood solution of the feasible solution x of tabu search algorithm in taboo list, Δ x is to move
Dynamic unit, Δ x are the function about mobile frequency n.
Claims (3)
1. a kind of power transmission line sag inversion method based on electric field information, which comprises the following steps:
1) ground field strength data under several transmission lines of electricity under normal circumstances are measured, it will ground field strength under transmission line of electricity under normal circumstances
Data as ground field strength sample, then using the arc sag of the corresponding transmission line of electricity under normal circumstances of each ground field strength sample as taboo
Then the feasible solution of searching algorithm passes through each ground field strength sample and its building taboo of the feasible solution of corresponding tabu search algorithm
Table；And obtain field strength data in ground under practical transmission line of electricity；
2) field strength data in ground under practical transmission line of electricity and the ground field strength sample in taboo list are compared, when practical transmission of electricity
When error under route in ground field strength data and taboo list between any ground field strength sample is less than or equal to preset value, then should
Ground field strength sample corresponds to optimal solution of the feasible solution of tabu search algorithm as search, and using the optimal solution of the search as real
The arc sag of border transmission line of electricity；Mistake between ground field strength sample each in field strength data in ground under practical transmission line of electricity and taboo list
When difference is all larger than preset value, then step 3) is gone to；
3) feasible solution of tabu search algorithm in taboo list is changed by move function, generates several tabu search algorithms
The neighborhood solution of feasible solution, and using the neighborhood solution of the tabu search algorithm feasible solution of generation as candidate solution, then pass through the candidate
Solution is updated taboo list, then goes to step 2).
2. the power transmission line sag inversion method according to claim 1 based on electric field information, which is characterized in that step 3)
In taboo list is updated by the candidate solution, then go to the concrete operations of step 2) are as follows:
3a) each candidate solution is judged by aspiration criterion, when candidate solution satisfaction despises rule, then by the candidate solution and
Corresponding ground field strength is added in taboo list, then goes to step 2)；When candidate solution is unsatisfactory for despising rule, then step is gone to
3b)；
3b) by except taboo list in each candidate solution candidate solution and its corresponding ground field strength be added in taboo list, then turn
To in step 2).
3. the power transmission line sag inversion method according to claim 1 based on electric field information, which is characterized in that mobile letter
Several expression formulas are as follows:
xnew=x+k* Δ x
Wherein, k=± 1, ± 2..., xnewFor the neighborhood solution of the feasible solution x of tabu search algorithm in taboo list, Δ x is mobile single
Position, Δ x are the function about mobile frequency n.
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| CN101349720A (en) * | 2008-08-28 | 2009-01-21 | 重庆电力科学试验研究院 | High pressure overhead power line power frequency electric field shielding analysis method |
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| CN105427190A (en) * | 2015-12-09 | 2016-03-23 | 国网重庆市电力公司电力科学研究院 | Three-dimensional power-frequency electric-field calculating method of ground below UHVAC power transmission line in complex terrain |
-
2017
- 2017-04-28 CN CN201710296516.9A patent/CN107063066B/en active Active
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| CN101349720A (en) * | 2008-08-28 | 2009-01-21 | 重庆电力科学试验研究院 | High pressure overhead power line power frequency electric field shielding analysis method |
| CN102721875A (en) * | 2012-06-15 | 2012-10-10 | 四川电力科学研究院 | Method for measuring three-dimensional power-frequency electric field on basis of curve integral of equivalent charges on surfaces of transmission conductors |
| CN104215180A (en) * | 2014-08-20 | 2014-12-17 | 国家电网公司 | Wireless sensor network based power transmission line sag detection device |
| CN105069282A (en) * | 2015-07-21 | 2015-11-18 | 国家电网公司 | Method for measuring and calculating magnetic field intensity near high-voltage power transmission line on mountain slope |
| CN105427190A (en) * | 2015-12-09 | 2016-03-23 | 国网重庆市电力公司电力科学研究院 | Three-dimensional power-frequency electric-field calculating method of ground below UHVAC power transmission line in complex terrain |
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