CN107622350A - A kind of transmission line of electricity lightning protection methods of risk assessment and system - Google Patents
A kind of transmission line of electricity lightning protection methods of risk assessment and system Download PDFInfo
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- CN107622350A CN107622350A CN201710866548.8A CN201710866548A CN107622350A CN 107622350 A CN107622350 A CN 107622350A CN 201710866548 A CN201710866548 A CN 201710866548A CN 107622350 A CN107622350 A CN 107622350A
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Abstract
The invention discloses a kind of transmission line of electricity lightning protection methods of risk assessment and system.Wherein, this method includes：The laser point cloud data of circuit to be assessed is gathered, line parameter circuit value is extracted according to this laser point cloud data；Obtain the damage to crops caused by thunder CG lightning density value and basic data of circuit to be assessed；Using obtained line parameter circuit value, damage to crops caused by thunder CG lightning density value and basic data, the lightning protection for calculating and drawing circuit to be assessed strikes back risk assessment figure and/or lightning protection around shooting risk evaluating figure, to carry out lightning protection risk assessment.The present invention realizes the acquisition line parameter circuit value of efficient quick, saves human cost, improves the operating efficiency of lightning protection risk assessment, improves the accuracy and reliability of assessment result.
Description
Technical field
The present embodiments relate to power transmission line lightning shielding control and application technology, more particularly to a kind of transmission line of electricity lightning protection risk
Appraisal procedure and system.
Background technology
In national grid construction and management, such as the extraction of polling transmission line, dangerous spot and circuit three-dimensional visualization pipe
Reason etc., the state-of-the-art technology of application is more and more, and the development speed of power network is indubitable.
Transmission line of electricity Lightning Transformation, it is a kind of important means for improving power supply reliability, can be used for reducing lightning stroke trip
Rate and stroke-incidence rate.Lightning protection security risk assessment is an important step during transmission line of electricity Lightning Transformation, is to formulate
Important prerequisite with implementing modification scheme.The lightning protection security evaluation of transmission line of electricity is carried out according to circuit thunder and lightning, structure, landform etc.
Shaft tower security evaluation step by step.Be directed to during a series of design parameters of transmission line of electricity, it is necessary to from existing design data
These parameters are arranged, need to go to measure to scene if not having relevant parameter in need in design data.
The method of above-mentioned acquisition transmission line parameter, data preparation consuming time length, workload during concrete application
Greatly, and the precision of data is difficult to be guaranteed.Such as shaft tower and ground elevation are calculated using the Digital height model of different accuracy,
Very big influence often is caused to the result of calculation of security evaluation.
The content of the invention
The present invention provides a kind of transmission line of electricity lightning protection methods of risk assessment and system, to realize the acquisition lightning protection of efficient quick
The calculating parameter of risk assessment, improve the accuracy and reliability of lightning protection risk evaluation result.
In a first aspect, the embodiments of the invention provide a kind of transmission line of electricity lightning protection methods of risk assessment, this method includes：
The laser point cloud data of circuit to be assessed is gathered, line parameter circuit value is extracted according to the laser point cloud data；
Obtain the damage to crops caused by thunder CG lightning density value and basic data of the circuit to be assessed；
Using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculate and draw described to be evaluated
The lightning protection for estimating circuit strikes back risk assessment figure and/or lightning protection around shooting risk evaluating figure, to carry out lightning protection risk assessment.
Further, line parameter circuit value is extracted according to the laser point cloud data, including：
Coordinate registration and data reduction, the entity point of generation wire, shaft tower and atural object are carried out to the laser point cloud data
Cloud data；
Two-dimensional vector operation is carried out to the entity cloud data, the material object for extracting the wire, shaft tower and atural object is special
Levy and make corresponding views；
According to the feature in kind and the view, the physical model of the wire, shaft tower and atural object is built, described in generation
Line corridor Digital height model to be assessed, and establish the three-dimensional corridor virtual scene of the circuit to be assessed；
The line parameter circuit value is extracted according to the Digital height model and the three-dimensional corridor virtual scene.
Further, the damage to crops caused by thunder CG lightning density value and basic data for obtaining circuit to be assessed, including：
With reference to the damage to crops caused by thunder CG lightning density thematic map of the circuit to be assessed, space querying is carried out using shaft tower coordinate, is obtained
The damage to crops caused by thunder CG lightning density value of every grade of shaft tower position in the circuit to be assessed；
Obtain the basic data in production management system.
Further, using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculate and draw
The lightning protection counterattack risk assessment figure of the circuit to be assessed and/or lightning protection are around shooting risk evaluating figure, to carry out lightning protection risk assessment,
Including：
Using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, the circuit to be assessed is calculated
Every grade of shaft tower counterattack trip-out rate, according to the shaft tower order carry out risk class statistic of classification with merging, draw out institute
The lightning protection counterattack risk assessment figure of circuit to be assessed is stated, to carry out lightning protection risk assessment；
And/or
Using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, the circuit to be assessed is calculated
Every grade of shaft tower back flash-over rate, according to the shaft tower order carry out risk class statistic of classification with merging, draw out institute
The lightning protection of circuit to be assessed is stated around shooting risk evaluating figure, to carry out lightning protection risk assessment.
Further, methods described also includes：
The counterattack trip-out rate of every grade of shaft tower and back flash-over rate are summed up into calculating, according to the order of the shaft tower
Integrated risk grade separation statistics is carried out with merging, draws out the lightning protection integrated risk assessment figure of the circuit to be assessed.
Second aspect, the embodiment of the present invention additionally provide a kind of transmission line of electricity lightning protection risk evaluating system, and the system includes：
Data extraction module, for gathering the laser point cloud data of circuit to be assessed, carried according to the laser point cloud data
Take line parameter circuit value；
Data acquisition module, for obtaining the damage to crops caused by thunder CG lightning density value and basic data of the circuit to be assessed；
Evaluation module, for using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculating simultaneously
The lightning protection for drawing the circuit to be assessed strikes back risk assessment figure and/or lightning protection around shooting risk evaluating figure, to carry out lightning protection risk
Assess.
Further, the data extraction module includes：
Collecting unit, for gathering the laser point cloud data of the circuit to be assessed；
First processing units, for carrying out coordinate registration and data reduction, generation wire, bar to the laser point cloud data
The entity cloud data of tower and atural object；
Second processing unit, for carrying out two-dimensional vector operation to the entity cloud data, extract the wire, bar
The feature in kind of tower and atural object simultaneously makes corresponding views；
3rd processing unit, for according to the feature in kind and the view, building the wire, shaft tower and atural object
Physical model, the line corridor Digital height model to be assessed is generated, and the three-dimensional corridor for establishing the circuit to be assessed is virtual
Scene；
Extraction unit, join for extracting the circuit according to the Digital height model and the three-dimensional corridor virtual scene
Number.
Further, the data acquisition module includes：
First acquisition unit, for the damage to crops caused by thunder CG lightning density thematic map with reference to the circuit to be assessed, utilize shaft tower coordinate
Space querying is carried out, obtains the damage to crops caused by thunder CG lightning density value of every grade of shaft tower position in the circuit to be assessed；
Second acquisition unit, for obtaining the basic data in production management system.
Further, the evaluation module includes：
First assessment unit, for utilizing the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, meter
The counterattack trip-out rate of every grade of shaft tower of the circuit to be assessed is calculated, risk class statistic of classification is carried out according to the order of the shaft tower
With merging, the lightning protection counterattack risk assessment figure of the circuit to be assessed is drawn out, to carry out lightning protection risk assessment；
And/or
Second assessment unit, for utilizing the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, meter
The back flash-over rate of every grade of shaft tower of the circuit to be assessed is calculated, risk class statistic of classification is carried out according to the order of the shaft tower
With merging, the lightning protection of the circuit to be assessed is drawn out around shooting risk evaluating figure, to carry out lightning protection risk assessment.
Further, the evaluation module also includes：
3rd assessment unit, for the counterattack trip-out rate of every grade of shaft tower and back flash-over rate to be summed up into calculating,
Order according to the shaft tower carries out integrated risk grade separation and counted with merging, and the lightning protection for drawing out the circuit to be assessed is comprehensive
Risk assessment figure is closed, to carry out lightning protection risk assessment.
Laser point cloud data of the invention by gathering circuit to be assessed, generate high-precision line corridor Digital height model
With three-dimensional corridor virtual scene, the line parameter circuit value in lightning protection risk assessment can be automatically extracted, solves and obtains in the prior art
Line parameter circuit value expends the problem of time is long, workload is big and data precision is not high, realizes the acquisition circuit ginseng of efficient quick
Number, saves human cost, improves the data precision, improve the operating efficiency of lightning protection risk assessment, improves assessment knot
The accuracy and reliability of fruit.
Brief description of the drawings
Fig. 1 is the flow chart for the transmission line of electricity lightning protection methods of risk assessment that the embodiment of the present invention one provides；
Fig. 2 is the flow chart for the transmission line of electricity lightning protection methods of risk assessment that the embodiment of the present invention two provides；
Fig. 3 is the structural representation for the transmission line of electricity lightning protection risk evaluating system that the embodiment of the present invention three provides.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is the flow chart for the transmission line of electricity lightning protection methods of risk assessment that the embodiment of the present invention one provides, and the present embodiment can
Suitable for the lightning protection risk assessment situation of transmission line of electricity.This method can be performed by lightning protection risk evaluating system, be specifically included
Following steps：
The laser point cloud data of step 110, collection circuit to be assessed, line parameter circuit value is extracted according to this laser point cloud data.
In the step, before laser point cloud data is gathered, user utilizes account and code entry lightning protection risk assessment system
System, prejudge in existing laser line walking data whether to have in the system that lightning protection risk assessment institute is carried out to circuit to be assessed
The track data needed, if so, then can directly utilize this ready-made data；If it is not, airborne laser thunder can be utilized
Up to collection in worksite cloud data.Airborne laser radar e measurement technology has that operating speed is fast, and field process amount is small, measurement accuracy
It is high, measurement data amount is big, automaticity is high and to greatest extent truly reflection earth's surface situation the features such as, so as to ensure that data are adopted
The efficiency of collection and the accuracy of data.
Then, the cloud data of collection is handled using transmission line of electricity laser radar data processing software, fast fast-growing
Into digital elevation model, digital surface model and digital orthoimage, accurately recover circuit and corridor, automatically extract out and comment
The track data needed is calculated in estimation.Wherein, the track data of extraction includes but is not limited to：Insulator chain length, wire radius, bar
Tower span, conducting wire sag are to ground level, tower top height, circuit mounting point height, separation, lightning-arrest wire spacing, lightning-arrest
Bank hangs down, lightning conducter mounting point height and the parameter such as lightning conducter radius.
Step 120, the damage to crops caused by thunder CG lightning density value and basic data for obtaining circuit to be assessed.
In the step, optionally, user logs in lightning protection risk evaluating system, and system loads include the damage to crops caused by thunder of circuit to be assessed
CG lightning density thematic map, space querying is carried out using shaft tower coordinate, obtains the thunder of every grade of shaft tower position in circuit to be assessed
Evil CG lightning density value.Further, obtained damage to crops caused by thunder CG lightning density Value Data can be stored in lightning protection risk evaluating system by user
Database in, such as damage to crops caused by thunder CG lightning density pond, or deposit user's specified folder in.
Optionally, user logs in assessment system, and engineering production management system (Power is accessed by the data center of system
Production Management System, PMS), the basic data of the circuit to be assessed in synchronous PMS.Wherein, basic number
According to the underlying parameter of including but not limited to overhead line structures.
Further, account table based on user can preserve obtained basic data, basic account table is carried out pre-
Determine the extension of field and preservation, as the storage table of the extracting parameter from circuit laser point cloud data, be named as line thunder protection and comment
Estimate account table.Wherein, the scheduled field of extension includes but is not limited to：Extracted in damage to crops caused by thunder CG lightning density value, laser point cloud data
Line parameter circuit value, thunder and lightning number of days, 50% (U50%) of damage to crops caused by thunder limit voltage threshold, lightning conducter type, minimum current (kA), resistance to thunder
The field that level (kA) and ground elevation etc. parameter take.
Step 130, the line parameter circuit value using obtaining, damage to crops caused by thunder CG lightning density value and basic data, calculate and draw to be assessed
The lightning protection counterattack risk assessment figure of circuit and/or lightning protection are around shooting risk evaluating figure, to carry out lightning protection risk assessment.
In the step, optionally, user is utilized based on obtained line parameter circuit value, damage to crops caused by thunder CG lightning density value and basic data
Regular method calculates the counterattack trip-out rate of every grade of shaft tower in circuit to be assessed, and shaft tower counterattack risk class is carried out according to shaft tower order
Statistics draws the lightning protection counterattack risk assessment figure of circuit to be assessed in assessment system, carries out lightning protection risk assessment with merging；
And/or the shielding tripping operation of every grade of shaft tower in circuit to be assessed is calculated using modified Eriksson (Eriksson) geometrical model
Rate, shaft tower shielding risk class is counted and merged according to shaft tower order, draws out the lightning protection shielding wind of circuit to be assessed
Figure is assessed in danger, carries out lightning protection risk assessment.
Specific risk class statistics refers to thunderbolt risk grading standard table 1 with merging, and as follows, S is circuit
Actual tripping rate with lightning strike controls reference value, if carrying out lightning protection counterattack risk assessment, Ri is a certain bar of the circuit being calculated
Tower corresponds to the counterattack trip-out rate of horizontal span section, and R is that the circuit being calculated averagely strikes back trip-out rate；If carry out lightning protection shielding
Risk assessment, then Ri is the back flash-over rate that a certain shaft tower of the circuit being calculated corresponds to horizontal span section, and R is calculated
The average back flash-over rate of circuit.
The thunderbolt risk grading standard of table 1.
| Thunderbolt risk grade | Ⅰ | Ⅱ | Ⅲ | Ⅳ |
| Shaft tower tripping rate with lightning strike | Ri ＜ S × 0.5 | S × 0.5≤Ri ＜ S × 1.0 | S × 1.0≤Ri ＜ S × 1.5 | Ri≥S×1.5 |
| Lightning outage rate | R ＜ S × 0.5 | S × 0.5≤R ＜ S × 1.0 | S × 1.0≤R ＜ S × 1.5 | R≥S×1.5 |
Further, step 130 also includes：The counterattack trip-out rate for every grade of shaft tower being calculated and back flash-over rate are entered
Row adds and calculated, and with reference to risk class criteria for classifying table 1, integrated risk grade separation is carried out to every grade of shaft tower by classification threshold values,
Shaft tower integrated risk grade is counted and merged according to shaft tower order, the lightning protection integrated risk for drawing out circuit to be assessed is commented
Figure is estimated, to carry out lightning protection risk assessment.Now, Ri is that a certain shaft tower of the circuit being calculated corresponds to water in risk class division table
The synthesis trip-out rate of flat span section, that is, strike back trip-out rate and back flash-over rate sum, and R is the circuit synthesis trip-out rate being calculated
Average value.
The technical scheme of the present embodiment, geographical information technology and airborne laser radar e measurement technology are fully utilized, is passed through
The laser point cloud data of collection in worksite circuit to be assessed, the circuit for assessing and calculating and needing is automatically extracted according to this laser point cloud data
Data, and combination damage to crops caused by thunder CG lightning density value and basic data calculate the counterattack trip-out rate and back flash-over rate of shaft tower respectively, solve
Line parameter circuit value is obtained in the prior art and expends the problem of time is long, workload is big and data precision is not high, is realized efficiently
Line parameter circuit value is efficiently obtained, saves human cost, improves the data precision, improves the work effect of lightning protection risk assessment
Rate, improve the accuracy and reliability of assessment result.
On the basis of above-mentioned technical proposal, optionally, circuit is extracted according to the laser point cloud data of collection in step 110
Parameter, it may particularly include：
Coordinate registration and data reduction are carried out to the laser point cloud data of collection, generate wire, shaft tower in circuit to be assessed
With the entity cloud data of atural object；Wherein coordinate registration is by the laser point cloud data coordinate of collection and actual circuit to be assessed
Map reference progress is registering, in elimination laser point cloud data gatherer process the problems such as caused coordinate offset；Data reduction is pair
The laser point cloud data of collection is identified, classified and filtering, removes noise spot and noise etc. in the cloud data of collection, keeps away
Exempt to impact the accuracy of assessment result.
Then, two-dimensional vector operation, the material object of extraction wire, shaft tower and atural object are carried out to obtained entity cloud data
Feature simultaneously makes corresponding views；Wherein, different objects can preferably be identified by extracting feature in kind, exemplary, different
Insulator chain length corresponding to shaft tower or tower top height are different, can carry out area to different shaft towers according to different characteristic lengths
Point.
Then, it is to be evaluated according to obtained feature in kind and view, the physical model of structure wire, shaft tower and atural object, generation
Estimate line corridor Digital height model, and establish three-dimensional corridor virtual scene；Optionally, line corridor numeral height to be assessed is being generated
Before journey figure, the elevation catastrophe point in cloud data is filtered, such as occur some ground points for a certain at zone boundary
The height of reference plane is negative value, and the presence of these points can influence the accuracy of elevation map, be removed so must filter off.
Finally, line parameter circuit value is automatically extracted out according to Digital height model and three-dimensional corridor virtual scene.Exemplary, can be certainly
Height, the automatic inclination angle that calculates shaft tower and ground etc. of the dynamic measurement shaft tower part to ground.Using high-precision Digital height model,
The inclination angle on accurate shaft tower and ground can be obtained so that assessment result is more reliable.And shaft tower and ground are inclined in the prior art
The calculating at angle often uses the Digital height model of low precision, and this result of calculation to security evaluation can impact.
In the present embodiment, according to the laser point cloud data of collection, the high accuracy number of circuit to be assessed can be quickly generated
Elevation map and three-dimensional corridor virtual scene, and then topography and geomorphology data and line parameter circuit value are obtained exactly, it ensure that risk assessment
During data accuracy, improve the reliability of lightning protection risk evaluation result.
Embodiment two
Fig. 2 is the flow chart for the transmission line of electricity lightning protection methods of risk assessment that the embodiment of the present invention two provides, and the present embodiment can
Suitable for the lightning protection risk assessment situation of transmission line of electricity.This method can be performed by lightning protection risk evaluating system, be specifically included
Following steps：
Step 210, obtain basic data.
User logs in lightning protection risk evaluating system, and the circuit to be assessed synchronously to come from PMS is accessed by data center
Basic data, wherein, basic data includes but is not limited to the underlying parameter of overhead line structures.Obtained basic data is saved as
Basic account table, the extension of scheduled field is carried out to basic account table, as next step 220 from circuit laser point cloud data
The storage table of middle extracting parameter, it is named as line thunder protection and assesses account table.Wherein, the scheduled field of extension includes but is not limited to：
It is insulator chain length (m), separation (m), wire mounting point height (m), conducting wire sag (m), wire radius (mm), lightning-arrest
Wire spacing (m), lightning conducter mounting point height (m), lightning conducter sag (m), lightning conducter radius (mm), thunder and lightning number of days, damage to crops caused by thunder limit
50% (U50%), lightning conducter type, minimum current (kA), resistance to thunder horizontal (kA), ground elevation and the ground sudden strain of a muscle for spending voltage threshold are close
The field that the parameters such as angle value take.In addition, by thunder and lightning number of days, 50% (U50%) of damage to crops caused by thunder limit voltage threshold, lightning conducter class
In the constant parameter write-in circuit lightning protection assessment account table such as type, minimum current (kA) and resistance to thunder horizontal (kA).
The laser point cloud data of step 220, collection circuit to be assessed.User's login system judges that existing laser patrols first
Whether line number has the laser point cloud data of circuit to be evaluated in, if so, then can directly utilize this ready-made data；If not yet
Have, then airborne laser radar collection in worksite cloud data can be utilized, into step 230.
Step 230, according to the cloud data of collection extract line parameter circuit value.Software is handled to collection using laser radar data
Laser point cloud data handled, obtain line corridor Digital height model, structure three-dimensional circuits corridor, then carried using program
Take shaft tower span, conducting wire sag to ground level, tower top height, circuit mounting point height, separation, lightning-arrest wire spacing,
The parameter such as lightning conducter sag and lightning conducter mounting point height, it is specific as follows：
1) field location cloud data to be evaluated are pre-processed, carry out coordinate registration and data reduction, generation wire, shaft tower and
The entity cloud data of atural object；
2) two-dimensional vector operation is carried out to obtained entity cloud data, the material object of extraction wire, shaft tower and atural object is special
Levy and make corresponding views；
3) the elevation catastrophe point in cloud data is filtered out, generates line corridor Digital height model to be assessed；
4) according to obtained feature in kind and view, the physical model of structure wire, shaft tower and atural object, three-dimensional transmission of electricity is established
Line corridor virtual scene；
5) according to Digital height model and corridor virtual scene, system automatically extracts shaft tower coordinate, shaft tower span, conducting wire sag
To ground level, tower top height, circuit mounting point height, separation, the lightning-arrest parameter value such as wire spacing and lightning conducter sag,
And write field corresponding to circuit lightning protection assessment account table.
Step 240, obtain damage to crops caused by thunder CG lightning density value.User logs in assessment system, system loading damage to crops caused by thunder CG lightning density special topic
Figure, damage to crops caused by thunder CG lightning density thematic map is inquired about using shaft tower coordinate space, dodged with obtaining the damage to crops caused by thunder per one-level shaft tower position close
Angle value, write circuit lightning protection assessment account table corresponding field.
Step 250, calculate counterattack trip-out rate.The parameter stored in account table is assessed based on line thunder protection, utilizes regular method
The counterattack trip-out rate of every grade of shaft tower of circuit is calculated, and risk class classification is carried out to every grade of shaft tower by classification threshold values, is as a result write
Lightning protection calculation account table.Wherein risk class classification refers to risk class criteria for classifying table 1, and S is the actual tripping rate with lightning strike of circuit
Reference value is controlled, Ri is the counterattack trip-out rate that a certain shaft tower of the circuit being calculated corresponds to horizontal span section, and R is calculated
Circuit averagely strikes back trip-out rate.If directly enter the lightning protection counterattack risk assessment of row line, into step 270.
Step 270, line located lightning protection counterattack risk assessment.The counterattack tripping operation in account table is assessed based on line thunder protection
Rate data, shaft tower counterattack risk class is counted with being merged by shaft tower order, the shaft tower that risk class identical is connected
It is placed in a grade, merges the differentiated lightning protection counterattack risk assessment for drawing out circuit to be assessed after having counted in systems
Figure, to carry out lightning protection risk assessment.
Step 260, calculate back flash-over rate.The parameter stored in account table is assessed based on line thunder protection, utilizes modified
Eriksson geometrical models calculate the back flash-over rate of every grade of shaft tower of circuit, and carry out risk etc. to every grade of shaft tower by classification threshold values
Level classification, as a result writes circuit lightning protection assessment account table.Wherein with reference to risk class division table 1, S is circuit for risk class classification
Actual tripping rate with lightning strike controls reference value, and Ri is the shielding tripping operation that a certain shaft tower of the circuit being calculated corresponds to horizontal span section
Rate, R are the average back flash-over rate of the circuit being calculated.If directly entering the lightning protection of row line around shooting risk evaluating, enter
Step 280.
Step 280, line located lightning protection are around shooting risk evaluating.The shielding tripping operation in account table is assessed based on line thunder protection
Rate data, shaft tower counterattack risk class is counted with being merged by shaft tower order, the shaft tower that risk class identical is connected
It is placed in a grade, merging draws out the differentiated lightning protection of circuit to be assessed around shooting risk evaluating in systems after having counted
Figure, to carry out lightning protection risk assessment.Assessed if carrying out line located lightning protection integrated risk, step 250 and step 260 it
After skip step 270 and step 280, be directly entered step 290.
Step 290, line located lightning protection integrated risk are assessed.The counterattack tripping operation for every grade of shaft tower that step 250 is obtained
The back flash-over rate for every grade of shaft tower that rate and step 260 obtain sums up calculating, obtains the synthesis trip-out rate of every grade of shaft tower, ginseng
Risk class criteria for classifying table 1 is examined, integrated risk grade separation is carried out to every grade of shaft tower by classification threshold values, result is write circuit
Lightning protection assessment account table；The result of calculation of storage is again based on, shaft tower integrated risk grade is counted according to shaft tower order
With merging, the shaft tower that risk class identical is connected is placed in a grade, merging is drawn after having counted in assessment system
Go out the lightning protection integrated risk assessment figure of circuit to be assessed, to carry out lightning protection risk assessment.Now, Ri is in risk class division table
The a certain shaft tower of circuit being calculated corresponds to the synthesis trip-out rate of horizontal span section, that is, strike back trip-out rate and back flash-over rate it
With the average value that, R is the circuit synthesis trip-out rate being calculated.
The technical scheme of the present embodiment, geographical information technology and airborne laser radar e measurement technology are fully utilized, is passed through
The laser point cloud data of collection in worksite circuit to be assessed, the circuit number for assessing and calculating and needing is automatically extracted according to this cloud data
According to, and combination damage to crops caused by thunder CG lightning density value and basic data calculate the counterattack trip-out rate and back flash-over rate of shaft tower respectively, solve
Line parameter circuit value is obtained in the prior art and expends the problem of time is long, workload is big and data precision is not high, is realized efficiently fast
Prompt acquisition line parameter circuit value, saves human cost, improves the data precision, improves the work effect of lightning protection risk assessment
Rate, improve the accuracy and reliability of assessment result.
Embodiment three
Fig. 3 be the embodiment of the present invention three provide transmission line of electricity lightning protection risk evaluating system structural representation, this implementation
Example is applicable to the lightning protection risk assessment situation of transmission line of electricity.The transmission line of electricity lightning protection risk assessment that the embodiment of the present invention is provided
System can perform the transmission line of electricity lightning protection methods of risk assessment that any embodiment of the present invention is provided, and it is corresponding to possess execution method
Functional module and beneficial effect.The concrete structure of the system is as follows：
Data extraction module 310, for gathering the laser point cloud data of circuit to be assessed, carried according to this laser point cloud data
Take line parameter circuit value.
Optionally, data extraction module 310 includes collecting unit, first processing units, second processing unit, the 3rd processing
Unit and extraction unit.Wherein：
Collecting unit, for gathering the laser point cloud data of circuit to be assessed；
First processing units, for carrying out coordinate registration and data reduction to the laser point cloud data of collection, generation wire,
The entity cloud data of shaft tower and atural object；
Second processing unit, for carrying out two-dimensional vector operation, extraction wire, shaft tower to obtained entity cloud data
With the feature in kind of atural object and make corresponding views；
3rd processing unit, for according to obtained feature in kind and view, the entity mould of structure wire, shaft tower and atural object
Type, line corridor Digital height model to be assessed is generated, and establish the three-dimensional corridor virtual scene of assessed circuit；
Extraction unit, for extracting line parameter circuit value according to Digital height model and three-dimensional corridor virtual scene.
Data acquisition module 320, for obtaining the damage to crops caused by thunder CG lightning density value and basic data of circuit to be assessed.
Further, data acquisition module 320 includes first acquisition unit and second acquisition unit.Wherein：
First acquisition unit, for combining the damage to crops caused by thunder CG lightning density thematic map of circuit to be assessed, carried out using shaft tower coordinate
Space querying, obtain the damage to crops caused by thunder CG lightning density value of every grade of shaft tower position in circuit to be assessed；
Second acquisition unit, for obtaining the basic data in production management system.
Evaluation module 330, for using obtained line parameter circuit value, damage to crops caused by thunder CG lightning density value and basic data, calculating and painting
The lightning protection for making circuit to be assessed strikes back risk assessment figure and/or lightning protection around shooting risk evaluating figure, to carry out lightning protection risk assessment.
Optionally, evaluation module 330 includes the first assessment unit and/or the second assessment unit.Wherein：
First assessment unit, for using obtained line parameter circuit value, damage to crops caused by thunder CG lightning density value and basic data, calculating to be evaluated
Estimate the counterattack trip-out rate of every grade of shaft tower of circuit, carry out risk class statistic of classification with merging according to the order of shaft tower, draw out
The lightning protection counterattack risk assessment figure of circuit to be assessed, to carry out lightning protection risk assessment；
Second assessment unit, for using obtained line parameter circuit value, damage to crops caused by thunder CG lightning density value and basic data, calculating to be evaluated
Estimate the back flash-over rate of every grade of shaft tower of circuit, carry out risk class statistic of classification with merging according to the order of shaft tower, draw out
The lightning protection of circuit to be assessed is around shooting risk evaluating figure, to carry out lightning protection risk assessment.
Further, evaluation module 330 also includes the 3rd assessment unit, for the first assessment unit to be obtained into every grade of shaft tower
Counterattack trip-out rate and the obtained back flash-over rate of the second assessment unit sum up calculating, integrated according to the order of shaft tower
Risk class statistic of classification is drawn out the lightning protection integrated risk assessment figure of circuit to be assessed, commented with carrying out lightning protection risk with merging
Estimate.
The technical scheme of the present embodiment, geographical information technology and airborne laser radar e measurement technology are fully utilized, is passed through
The laser point cloud data of collection in worksite circuit to be assessed, the circuit number for assessing and calculating and needing is automatically extracted according to this cloud data
According to, and combination damage to crops caused by thunder CG lightning density value and basic data calculate the counterattack trip-out rate and back flash-over rate of shaft tower respectively, solve
Line parameter circuit value is obtained in the prior art and expends the problem of time is long, workload is big and data precision is not high, is realized efficiently fast
Prompt acquisition line parameter circuit value, saves human cost, improves the data precision, improves the work effect of lightning protection risk assessment
Rate, improve the accuracy and reliability of assessment result.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
- A kind of 1. transmission line of electricity lightning protection methods of risk assessment, it is characterised in that including：The laser point cloud data of circuit to be assessed is gathered, line parameter circuit value is extracted according to the laser point cloud data；Obtain the damage to crops caused by thunder CG lightning density value and basic data of the circuit to be assessed；Using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculate and draw the line to be assessed The lightning protection counterattack risk assessment figure on road and/or lightning protection are around shooting risk evaluating figure, to carry out lightning protection risk assessment.
- 2. according to the method for claim 1, it is characterised in that line parameter circuit value, bag are extracted according to the laser point cloud data Include：Coordinate registration and data reduction, the entity point cloud number of generation wire, shaft tower and atural object are carried out to the laser point cloud data According to；Two-dimensional vector operation is carried out to the entity cloud data, extracts the feature in kind of the wire, shaft tower and atural object simultaneously Make corresponding views；According to the feature in kind and the view, the physical model of the wire, shaft tower and atural object is built, is generated described to be evaluated Estimate line corridor Digital height model, and establish the three-dimensional corridor virtual scene of the circuit to be assessed；The line parameter circuit value is extracted according to the Digital height model and the three-dimensional corridor virtual scene.
- 3. according to the method for claim 1, it is characterised in that the damage to crops caused by thunder CG lightning density value for obtaining circuit to be assessed and Basic data, including：With reference to the damage to crops caused by thunder CG lightning density thematic map of the circuit to be assessed, space querying is carried out using shaft tower coordinate, described in acquisition The damage to crops caused by thunder CG lightning density value of every grade of shaft tower position in circuit to be assessed；Obtain the basic data in production management system.
- 4. according to the method for claim 1, it is characterised in that utilize the line parameter circuit value, the damage to crops caused by thunder CG lightning density value With the basic data, calculate and draw the lightning protection counterattack risk assessment figure and/or lightning protection shielding risk of the circuit to be assessed Figure is assessed, to carry out lightning protection risk assessment, including：Using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, the every of the circuit to be assessed is calculated The counterattack trip-out rate of level shaft tower, carry out risk class statistic of classification according to the order of the shaft tower and merge, draw out described treat Assess the lightning protection counterattack risk assessment figure of circuit；And/orUsing the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, the every of the circuit to be assessed is calculated The back flash-over rate of level shaft tower, carry out risk class statistic of classification according to the order of the shaft tower and merge, draw out described treat The lightning protection of circuit is assessed around shooting risk evaluating figure.
- 5. according to the method for claim 4, it is characterised in that methods described also includes：The counterattack trip-out rate of every grade of shaft tower and back flash-over rate are summed up into calculating, carried out according to the order of the shaft tower Integrated risk grade separation is counted and merged, and draws out the lightning protection integrated risk assessment figure of the circuit to be assessed.
- A kind of 6. transmission line of electricity lightning protection risk evaluating system, it is characterised in that including：Data extraction module, for gathering the laser point cloud data of circuit to be assessed, line is extracted according to the laser point cloud data Road parameter；Data acquisition module, for obtaining the damage to crops caused by thunder CG lightning density value and basic data of the circuit to be assessed；Evaluation module, for using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculating and drawing The lightning protection counterattack risk assessment figure of the circuit to be assessed and/or lightning protection are around shooting risk evaluating figure, to carry out lightning protection risk assessment.
- 7. system according to claim 6, it is characterised in that the data extraction module includes：Collecting unit, for gathering the laser point cloud data of the circuit to be assessed；First processing units, for carrying out coordinate registration and data reduction to the laser point cloud data, generation wire, shaft tower and The entity cloud data of atural object；Second processing unit, for the entity cloud data carry out two-dimensional vector operation, extract the wire, shaft tower and The feature in kind of atural object simultaneously makes corresponding views；3rd processing unit, for according to the feature in kind and the view, building the entity of the wire, shaft tower and atural object Model, the line corridor Digital height model to be assessed is generated, and establish the three-dimensional corridor virtual scene of the circuit to be assessed；Extraction unit, for extracting the line parameter circuit value according to the Digital height model and the three-dimensional corridor virtual scene.
- 8. system according to claim 6, it is characterised in that the data acquisition module includes：First acquisition unit, for the damage to crops caused by thunder CG lightning density thematic map with reference to the circuit to be assessed, carried out using shaft tower coordinate Space querying, obtain the damage to crops caused by thunder CG lightning density value of every grade of shaft tower position in the circuit to be assessed；Second acquisition unit, for obtaining the basic data in production management system.
- 9. system according to claim 6, it is characterised in that the evaluation module includes：First assessment unit, for using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculating institute The counterattack trip-out rate of every grade of shaft tower of circuit to be assessed is stated, risk class statistic of classification is carried out with closing according to the order of the shaft tower And draw out the lightning protection counterattack risk assessment figure of the circuit to be assessed；And/orSecond assessment unit, for using the line parameter circuit value, the damage to crops caused by thunder CG lightning density value and the basic data, calculating institute The back flash-over rate of every grade of shaft tower of circuit to be assessed is stated, risk class statistic of classification is carried out with closing according to the order of the shaft tower And the lightning protection of the circuit to be assessed is drawn out around shooting risk evaluating figure.
- 10. system according to claim 9, it is characterised in that the evaluation module also includes：3rd assessment unit, for the counterattack trip-out rate of every grade of shaft tower and back flash-over rate to be summed up into calculating, according to The order of the shaft tower carries out integrated risk grade separation statistics and merged, and draws out the lightning protection synthesis wind of the circuit to be assessed Assess figure in danger.
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| CN113256164A (en) * | 2021-06-21 | 2021-08-13 | 广东电网有限责任公司佛山供电局 | Lightning protection influence assessment method based on line point cloud |
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