CN106639488A - Method for distributing anti-bird device of direct-current power transmission line tower in high-altitude area - Google Patents
Method for distributing anti-bird device of direct-current power transmission line tower in high-altitude area Download PDFInfo
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- CN106639488A CN106639488A CN201611235538.6A CN201611235538A CN106639488A CN 106639488 A CN106639488 A CN 106639488A CN 201611235538 A CN201611235538 A CN 201611235538A CN 106639488 A CN106639488 A CN 106639488A
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- flashover
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- proof device
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/30—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water
- A01M29/32—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water specially adapted for birds, e.g. spikes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Birds (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Insects & Arthropods (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Insulators (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention provides a method for distributing an anti-bird device of a direct-current power transmission line tower in a high-altitude area. The method includes the following steps that bird excrement is sprayed to different positions of the lower portion of a cross arm of the power transmission line tower for bird excrement flashover testing, and an area with the flashover phenomenon is determined as a flashover area; the anti-bird device is installed on the portion, above the flashover area, of the power transmission line tower. The flashover area, where the flashover phenomenon is likely to happen, on the lower portion of the cross arm can be accurately determined, and then the anti-bird device is installed on the portion, above the flashover area, of the power transmission line tower, so the anti-bird device is installed more reasonably, the situation that the anti-bird device is installed in an area where the flashover phenomenon is not likely to happen and accordingly installation waste of the anti-bird device is caused is avoided, the number of installed anti-bird devices is effectively reduced, the installation cost of the anti-bird device is greatly reduced, the occurrence frequency of power transmission line flashover accidents caused by bird excrement can be effectively reduced, and safe operation of the power transmission line is ensured.
Description
Technical field
The present invention relates to transmission system technical field, in particular to a kind of high altitude localitiess DC power transmission line bar
The method for arranging of tower bird-proof device.
Background technology
The area such as high altitude localitiess, such as Qinghai, Tibet, transmission line of electricity vegetation protection on the way are good, birds activity frequency
It is numerous.Birds Jing often stops rest and nest etc. on iron tower of power transmission line, and the larger birds of build are on power main line pole tower
When voiding excreta, its feces often forms an elongated birds droppings passage with preferable electric conductivity, what feces fell downwards
During can shorten air gap distance between transmission pressure or grading ring and shaft tower, transmission of electricity can be caused under certain conditions
Wire discharges to shaft tower, causes line tripping accident, and the phenomenon is referred to as birds droppings flashover fault, and birds droppings flashover fault seriously threatens electricity
The safe and stable operation of net.
To prevent birds droppings flashover fault, typically, by preventing birds from resting in electric power line pole tower using bird-proof device
On, existing anti-bird measure mainly includes：Bird-resistant, bird-proof needle plate, flush bat, brushing paint, bird-scaring unit, bird repellent board etc., its
In, bird-resistant and bird-proof needle plate are the most commonly used and one of effective measures.At present, the arrangement of electric power line pole tower bird-proof device
Mode be all based on low altitude area birds mechanicses and life habit arrangement, however, for the anti-bird of high altitude localitiess
The arrangement of device does not have related standard that can be for reference or installation specification.If bird-proof device arrangement scope is excessive, can
Increase mounting cost and cost, cause to waste；If arrangement scope is too small and due protection effect is not had.Additionally, High aititude
The atmospheric density in area is relatively low, causes the disruptive field intensity of the air gap to decline, while the wind speed at the installation region of bird-proof device
Birds droppings may be caused to float towards high potential lead, shorten the air gap insulation distance, so, considerably increase bird-proof device arrangement
Difficulty.
The content of the invention
The present invention proposes a kind of method for arranging of high altitude localitiess DC transmission line line pole tower bird-proof device, it is intended to solve
The problem that bird-proof device arrangement scope accurately cannot determine in prior art.
The present invention proposes a kind of method for arranging of high altitude localitiess DC transmission line line pole tower bird-proof device, the method bag
Include following steps：Birds droppings is sprayed in the diverse location of electric power line pole tower cross-arm to below cross-arm, carry out birds droppings flashover test, and
The region that flashover occurs is defined as into flashover region；Anti- bird is arranged being placed on the electric power line pole tower of flashover overlying regions
Device.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, the step of determine flashover region
Further include：Using the line of symmetry of V-type insulator chain below cross-arm and the joint of cross-arm as starting point, on cross-arm by
Put and birds droppings is sprayed below the cross-arm of both sides to the left and right, and carry out birds droppings flashover test, and will not occur corresponding to flashover
Position be identified as left and right two flashover critical points；By in the region between cross-arm and V-type insulator chain, dodge positioned at two
Part between network critical point is defined as flashover region.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, the step of determine flashover region
Further comprise：According to the height above sea level and wind speed of electric power line pole tower installation region, to the critical click-through of the flashover of left and right two
Row amendment, it is determined that the maximum flashover critical point in left and right two；By in the region between cross-arm and V-type insulator chain, positioned at two most
Part between big flashover critical point is defined as maximum flashover region；In the step of arrangement bird-proof device, maximum flashover is being placed in
Bird-proof device is arranged on the electric power line pole tower of overlying regions.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, it is determined that left and right two is maximum dodging
The step of network critical point, further includes：According to formulaCalculate height above sea level amendment system
Number kh, in above formula, height above sea levels of the H for electric power line pole tower installation region；According to formula Rmax=khR+ Δs R calculates maximum critical
Flashover distance Rmax, in above formula, R is the distance of arbitrary flashover critical point to starting point, and Δ R is according to electric power line pole tower installing zone
The flashover that the wind speed in domain is determined extends distance；Will be by the maximum critical flashover distance R of starting point both sides prolongation to the left and rightmaxPosition afterwards
Put and be defined as the maximum flashover critical point in left and right two.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, pacified according to electric power line pole tower
It is 2.0m that the flashover that the wind speed in dress region is determined extends distance, delta R.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, arrangement bird-proof device the step of
Further include：When electric power line pole tower is tangent tower, in the cross-arm and ground wire of the tangent tower for being placed in flashover overlying regions
Bird-proof device is arranged on frame；When electric power line pole tower is anchor support, in the cross-arm of the anchor support for being placed in flashover overlying regions
With bird-proof device is arranged on ground wire cross-arm.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, when electric power line pole tower is straight
During transmission tower, the main material and auxiliary material and earth wire support in the upper and lower of cross-arm arranges bird-proof device；When transmission line of electricity bar
Tower be anchor support when, the upper and lower of the main material and auxiliary material and ground wire cross-arm of the upper and lower of cross-arm main material and
Auxiliary material arranges bird-proof device.
In the method for arranging of above-mentioned high altitude localitiess DC transmission line line pole tower bird-proof device, bird-proof device includes：Anti- bird
Thorn and/or bird-proof needle plate.
In the present invention, it is first determined flashover region, so as to accurately determine out
Flashover region, then bird-proof device is installed on the electric power line pole tower of flashover overlying regions so that the installation of bird-proof device is more
Rationally, it is to avoid bird-proof device causes the installation of bird-proof device to waste installed in the region for being not susceptible to flashover, effectively subtracts
The installation number of bird-proof device on electric power line pole tower is lacked, has greatlyd save the installation cost of bird-proof device, solved existing
The problem that bird-proof device arrangement scope accurately cannot determine in technology, additionally it is possible to which transmission line of electricity dodges caused by being effectively reduced birds droppings
The occurrence frequency of network accident, it is ensured that the safe operation of transmission line of electricity, also, bird-proof device is easy to work in the setting of flashover region
Make operation of the personnel to electric power line pole tower.
Description of the drawings
By the detailed description for reading hereafter preferred implementation, various other advantages and benefit are common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for the purpose for illustrating preferred implementation, and is not considered as to the present invention
Restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical part.In the accompanying drawings：
Fig. 1 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
Flow chart；
Fig. 2 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the flow chart of flashover area determination step；
In the method for arranging of the high altitude localitiess DC transmission line line pole tower bird-proof device that Fig. 3 is provided for present example,
Flashover test arrangement schematic diagram；
Fig. 4 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the principle schematic of flashover area determination step；
Fig. 5 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the graph of relation of birds droppings probability of flashover and starting point to the jet opening distance of bird defecation analog；
Fig. 6 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
Another flow chart；
Fig. 7 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the matched curve figure of height above sea level correction factor；
Fig. 8 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the structural representation of straight line pole；
Fig. 9 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the structural representation of strain rod tower.
Figure 10 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the arrangement schematic diagram of the bird-proof device of the cross-arm of electric power line pole tower；
Figure 11 is the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
In, the method for arranging schematic diagram of bird-proof device on the earth wire support of straight line pole.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure and should not be by embodiments set forth here
Limited.On the contrary, there is provided these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
Referring to Fig. 1, Fig. 1 is the cloth of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
The flow chart for putting method.As illustrated, the method for arranging of high altitude localitiess DC transmission line line pole tower bird-proof device include it is as follows
Step：
Flashover area determination step S1, to below cross-arm sprays birds droppings in the diverse location of electric power line pole tower cross-arm, enters
Row birds droppings flashover test, and the region that flashover occurs is defined as into flashover region.
Specifically, birds droppings is sprayed using bird defecation analog, bird defecation analog can be application number
201310170359.9 bird defecation analog, it is of course also possible to be other bird defecation analog, the present embodiment
This is not intended to be limited in any.Wherein, the birds droppings of bird defecation analog injection can be simulation birds droppings.When bird defecation is simulated
When device is placed in any position of cross-arm, lower section injection simulation birds droppings of the bird defecation analog to cross-arm, and preset
The birds droppings flashover test of number of times, if there is no flashover, it is determined that the position does not occur flashover；Otherwise, it determines should
There is flashover in position.Bird defecation analog is sequentially placed into into the other positions of cross-arm according to default deposition path, it is right
Each position carries out the birds droppings flashover test of preset times, and each position that flashover occurs at last most carries out collecting determining
Flashover region, other regions are then safety zone.Easily there is flashover in the flashover region representation region, birds can not be in the area
Birds droppings is drained in domain；Safety zone represents that the region is not susceptible to flashover, and birds can be in freely activity in the region.
It should be noted that default deposition path and preset times can be determined according to practical situation, the present embodiment
Any restriction is not done to this.
Deposition step S2, arranges bird-proof device on the power main line pole tower for being placed in flashover overlying regions.
Specifically, birds are typically stood on power main line pole tower, therefore, by flashover overlying regions and corresponding to sudden strain of a muscle
Bird-proof device is arranged on the shaft tower in network region.
As can be seen that in the present embodiment, it is first determined flashover region, so as to accurately determine out
The flashover region of raw flashover, then bird-proof device is installed on the electric power line pole tower of flashover overlying regions so that anti-bird dress
The installation put is more reasonable, it is to avoid bird-proof device causes the installation wave of bird-proof device installed in the region for being not susceptible to flashover
Take, effectively reduce the installation number of bird-proof device on electric power line pole tower, greatly save the installation cost of bird-proof device,
In solving the problems, such as prior art, bird-proof device arrangement scope accurately cannot determine, additionally it is possible to caused by being effectively reduced birds droppings
The occurrence frequency of transmission line of electricity flashover fault, it is ensured that the safe operation of transmission line of electricity, also, bird-proof device set in flashover region
Put, be easy to operation of the staff to electric power line pole tower.
Referring to Fig. 2, Fig. 2 is the cloth of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
Put in method, the flow chart of flashover area determination step.In above-described embodiment, the step of above-mentioned determination flashover region, i.e. flashover
Area determination step S1 is further included：
First determines sub-step S11, using the line of symmetry of V-type insulator chain below cross-arm and the joint of cross-arm as rising
Point, on cross-arm by the starting point to the left and right cross-arm of both sides below spray birds droppings, and carry out birds droppings flashover test, and will not occur
Position corresponding to flashover is identified as the two flashover critical points in left and right.
Specifically, cross-arm is symmetrical arranged relative to tower body, and V-type insulator is provided with below the cross-arm of the left and right sides
String.Illustrate by taking the cross-arm of left side as an example now, right side cross-arm is identical with the determination method of the flashover critical point of left side cross-arm.It is left
The V-type insulator chain of the lower section of side cross-arm takes the line of symmetry of V-type insulator chain, and line of symmetry is upwardly extended to be symmetrical arranged
Cross with cross-arm, the joint is defined as starting point.Due to the underhung gold utensil of V-type insulator chain, so, when bird defecation mould
When intending the position that device is placed near starting point, easily there is flashover；When birds droppings defecation analog is disposed away from starting point
During position, flashover is not susceptible to.
On the cross-arm of left side, by starting point, bird defecation simulation dress is placed respectively according to default deposition path in both sides to the left and right
Put, bird defecation analog sprays birds droppings successively to below cross-arm at each position, and carries out at each position pre-
If the birds droppings flashover test of number of times.When bird defecation analog is positioned to a certain position of starting point, preset times are carried out
There is no flashover in birds droppings flashover test, also, when bird defecation analog is located at the adjacent position of the position, its
In, the adjacent position carries out the birds droppings flashover test of preset times, there occurs flashover closer to starting point, then by the position
It is defined as flashover critical point.Due to bird defecation analog be by starting point respectively both sides change location successively to the left and right, so
Flashover critical point is left and right two.When being embodied as, the flashover critical point of left and right two is relative to a point symmetry.
Second determines sub-step S12, by the region between cross-arm and V-type insulator chain, positioned at two flashover critical points
Between part be defined as flashover region.
Specifically, flashover usually occurs in the region between cross-arm and V-type insulator chain.First determines sub-step
Easily there is flashover in the region between the flashover critical point of left and right two determined in rapid S11, above-mentioned two region is carried out
Comprehensive, then by the region between cross-arm and V-type insulator chain, and the part between two flashover critical points is defined as
Flashover region.
Lower mask body introduces the determination method in flashover region：Birds droppings flashover is carried out in the case of calm and in high altitude localitiess
Test, test arrangement and test principle are referring to Fig. 3.When being embodied as, whole test is entered in the altitude test base of 4300m
OK, the contour structures of cross-arm 13 are simulated come the cross-arm structure of the wherein side of mimic transmission line line pole tower using simulation cross-arm 13
Size is consistent with the cross-arm 1 of reality, and the outside framework of the simulation cross-arm 13 is in rectangular-shape, the simulation cross-arm 13 it is a length of
18m, a width of 2.5m and a height of 0.82m, also, the simulation cross-arm 13 is suspended on portal structure.V-type insulator chain 5 adopts V-type
Composite insulator string, the wire 3 of 5 lower end of V-type insulator is quadripartion analog conducting wire, and the length of quadripartion analog conducting wire is 18m.
The external diameter 90cm of high-pressure side grading ring 4, caliber are 8cm, and the top of grading ring 4 to vertical dimension b for simulating 13 lower floor of cross-arm is
5.8m, quadripartion analog conducting wire apart from ground apart from a be 12m.Bird defecation analog 2 adopts application number
201310170359.9 bird defecation analog, to the lower section injection simulation birds droppings of simulation cross-arm 13.
Apply+400kV high direct voltages to wire 3 during birds droppings flashover test, bird defecation analog is placed on into simulation
On the steelframe of 13 lower floor of cross-arm, birds droppings spout and the bottom of simulation cross-arm 13 of bird defecation analog 2 flush.Due to V
Type insulator chain 5 has symmetry, so, in order to reduce experiment work amount, carry out in the side of 5 line of symmetry of V-type insulator chain
Test, in the present embodiment, is tested on the right side of V-type insulator chain line of symmetry.In order to avoid bird defecation analog 2
The birds droppings of injection is fallen on 5 body of V-type insulator chain, affects the accuracy of test, then by the spray of bird defecation analog 2
Mouth is adjusted correspondingly corresponding to the position of simulation cross-arm 13.
Rectangular coordinate system is set up on the lower layer plane of simulation cross-arm 13, the foundation of coordinate system is referring to Fig. 4.In the diagram, O
Point is the line of symmetry and the joint for simulating cross-arm 13, i.e. starting point of V-type insulator chain 5, sets up right angle seat by zero of O points
Mark system, its x-axis are parallel with the length direction of simulation cross-arm 13, and y-axis is parallel with the width of simulation cross-arm 13.
During test, using O points as starting point, the location point is labeled as T1, its T1Point coordinate for (0,0), set in coordinate system
Fixed multiple testing sites, bird defecation analog 2 is respectively placed at each testing site, birds droppings flashover test is carried out.Due to V-type it is exhausted
Edge substring 5 is located just at the underface of x-axis, if each testing site is selected in x-axis, birds droppings is directly injected to simulation cross-arm 13
On the V-type insulator chain 5 of lower section, the accuracy of birds droppings flashover test result is have impact on, then each testing site is placed in into deviation V-type exhausted
At the position of the full skirt edge certain distance of edge substring 5.In the present embodiment, with reference to the impact of live various random factors, then
It is 0.4m by the distance that x-axis is deviateed in each testing site, namely each testing site is deviateed the distance at the full skirt edge of V-type insulator chain 5 and is
The point for deviateing 0.4m in y-axis is designated as T by 0.4m2, T2Point coordinate for (0,0.4).By each testing site T3、T4……TnDeng
It is sequentially arranged along the direction parallel with x-axis positive direction, there is between two neighboring testing site preset pitch.When being embodied as, should
Preset pitch can determine according to practical situation, in the present embodiment, be introduced so that preset pitch is as 0.5m as an example,
Then T3Coordinate for (0.5,0.4), T4Coordinate for (1,0.4).
During test, bird defecation analog 2 is sequentially placed in order in T2、T3、T4……TnTesting site.Every
Birds droppings is sprayed to below simulation cross-arm 13 in individual testing site, bird defecation analog 2, and carries out the birds droppings flashover of preset times
Test, calculates probability of flashover, and wherein probability of flashover represents the number of times that flashover occurs.If being more than 0 in certain position probability of flashover,
Then represent that the position occurs flashover, bird defecation analog 2 is positioned over into adjacent next testing site, repetition is above-mentioned
Test, until probability of flashover is 0, represents that the position does not occur flashover, the position can be designated as Tn.Due in this reality
Apply in example, the preset pitch between two neighboring testing site is 0.5m, in order to improve the accuracy of flashover region determination, so,
To the T for determiningnThe position of testing site is further limited, and concrete grammar is as follows：
By TnPrevious testing site be designated as Tn-1, testing site Tn-1Near starting point.In Tn-1With TnBetween with 0.1m be between
Away from 4 testing sites of insertion, T is designated as respectivelyn1, Tn2, Tn3, Tn4, as shown in Figure 4.Certainly, in Tn-1With TnBetween can also be with other
Spacing insert other quantity testing site, the present embodiment is in Tn-1With TnBetween the quantity of testing site inserted and insertion
Two neighboring testing site between spacing do not do any restriction.Then according to by Tn1To Tn4Order bird defecation is simulated
Device 2 is sequentially placed into Tn1, Tn2, Tn3, Tn4Testing site, in each testing site, bird defecation analog 2 to simulation cross-arm
Spray birds droppings below 13, and carry out the flashover test of preset times, calculate probability of flashover.If the flashover at some testing site
Probability is not 0, then the coordinate of the critical point is designated as (x, y) previous testing site as critical point, then the critical point is to seat
The distance of origin O is marked, i.e., critical flashover radius R is：
With O points as the center of circle, critical flashover radius R is that radius draws circle, then the region within the border circular areas scope is flashover
Region.But, if bird-proof device is arranged in circular flashover region, considerably increase the difficulty of bird-proof device arrangement, therefore,
Two intersection points of the circle with x-axis are designated as into M points and N points respectively, then M points and N points are defined as the left and right of the starting point O point left and right sides
Two flashover critical points, any one flashover critical point are equal to critical flashover radius R apart from the distance of starting point.M points and N are crossed respectively
Point does the parallel lines with y-axis, and two parallel lines are designated as A respectively with the intersection point at 13 edge of simulation cross-arm1、B1、C1、D1, then by A1-
B1-C1-D1The rectangular area of composition, also, the part being placed between cross-arm and V-type insulator chain is defined as flashover region, other
Region is then safety zone.As electric power line pole tower has symmetry, so, flashover region and the right side cross-arm of left side cross-arm
Flashover region be also symmetrical, then when being embodied as, need to only determine the flashover region of wherein side cross-arm.Need explanation
It is that the preset times tested by each testing site on cross-arm can determine according to practical situation that the present embodiment is to this
Any restriction is not done, it is preferred that carry out the preset times all same of birds droppings flashover test in each testing site.
Multigroup test data is drawn according to above-mentioned test method in the present embodiment, probability of flashover and bird defecation mould is drawn
Intend the distance relation curve of the spout to zero O points of device 2, as shown in Figure 5.Knowable to the data analysiss in Fig. 5, work as bird
When within the scope of the certain distance of the jet opening distance starting point O point of class defecation analog 2, probability of flashover is 100%, more than a certain
After distance, probability of flashover starts on a declining curve, and when distance increases at the position of 3.04m, probability of flashover is reduced to 0%.
It is exemplified below according to the T for determiningnTesting site come determine left and right two flashover critical points method：
Between the distance of the spout to starting point O point of probability of flashover and bird defecation analog 2 according to represented by Fig. 5
Relation, it is known that, bird defecation analog 2 spout to starting point O point distance be 3.04m when, probability of flashover is 0, then for
It is easy to calculate, and matches for 0.5m with the spacing of above-mentioned two neighboring testing site, it is assumed that TnThe probability of flashover at place
For 0, it is assumed that TnCoordinate for (3,0.4), previous testing site Tn-1Coordinate for (2.5,0.4).In Tn-1With TnBetween with 0.1m
Coordinate for 4 testing sites of spacing insertion is respectively Tn1(2.9,0.4), Tn2(2.8,0.4), Tn3(2.7,0.4), Tn4(2.6,
0.4)。
First, bird defecation analog 2 is placed in into Tn1Testing site, carries out the birds droppings flashover test of preset times, calculates
The probability of flashover for going out is 0.Then, bird defecation analog 2 is placed in into Tn2Testing site, carries out the birds droppings flashover examination of preset times
Test, the probability of flashover for calculating is 0.Bird defecation analog is placed in into T againn3Testing site, the probability of flashover for calculating are 0.
Bird defecation analog is placed in into T againn4Testing site, it is assumed that the probability of flashover for calculating is 9%, then by Tn3Testing site conduct
Critical point, critical flashover radiusWith O points as the center of circle, 2.75m is that radius draws circle, the circle and x-axis
Intersection point be designated as the two flashover critical points in left and right, the coordinate of two flashover critical points be respectively (2.75,0) and (- 2.75,0), then
Any one flashover critical point is critical flashover radius R=2.75m apart from the distance of O points.Cross two flashover critical points to do and y-axis
Parallel lines, by the region between two parallel lines, and the part being placed between cross-arm and V-type insulator chain is defined as flashover
Region.
As can be seen that in the present embodiment, first determine two flashover critical points of the starting point left and right sides, further according to two flashovers
Critical point determines flashover region, improves the accuracy of flashover region determination.
Referring to Fig. 6, Fig. 6 is the cloth of DC transmission line line pole tower bird-proof device in high altitude localitiess provided in an embodiment of the present invention
Put the another flow chart of method.In above-described embodiment, the method for arranging of high altitude localitiess DC transmission line line pole tower bird-proof device
Comprise the steps：
First determines sub-step S11, using the line of symmetry of V-type insulator chain below cross-arm and the joint of cross-arm as rising
Point, on cross-arm by the starting point to the left and right cross-arm of both sides below spray birds droppings, and carry out birds droppings flashover test, and will not occur
Position corresponding to flashover is identified as the two flashover critical points in left and right.
Wherein, first determine sub-step S11 specific embodiment referring to above-described embodiment, the present embodiment to this not
Repeating.
3rd determines sub-step S13, according to the height above sea level and wind speed of electric power line pole tower installation region, to left and right two
Flashover critical point is modified, it is determined that the maximum flashover critical point in left and right two.
Specifically, in the actual motion of electric power line pole tower, the height above sea level of shaft tower installation region is different with wind speed,
The determination of flashover critical point can be affected, and then affect the determination in flashover region.Height above sea level is higher, then air
Density is lower, and the disruptive field intensity of the air gap is gradually lowered so that bigger flashover region come prevent birds droppings occur flashover
Phenomenon.Also, the impact of wind speed can also cause the determination of flashover critical point to be affected.
For the method for the two flashover critical point amendments in left and right has a lot, the present embodiment does not do any restriction to this, at this
One of which modification method is listed in embodiment only, it is determined that the step of the maximum flashover critical point in left and right two, i.e., the 3rd is true
Sub-step S13 may further include：
Step S131, according to formulaCalculate height above sea level correction factor kh, above formula
In, height above sea levels of the H for electric power line pole tower installation region.
Specifically, the flashover really wire with high potential or the air gap between grading ring and birds droppings end
It is breakdown, understand based on gas discharge is theoretical, for the area of more than 1000m, height above sea level often increases 100m, then dielectric strength
Reduce by 1%.Also, the critical flashover radius R=2.75m in above-described embodiment at height above sea level is for 4300m, i.e. flashover face
Boundary's point apart from starting point O point distance be 2.75m, the present embodiment with height above sea level as 4300m at critical flashover radius R=
According to above-mentioned height above sea level correction factor k on the basis of 2.75mhComputing formula draw the height above sea level of other high altitude localitiess with
The corresponding relation of critical flashover radius such as table 1.
The critical flashover radius of 1 Different Altitude Regions of table
Referring to Fig. 7, in Fig. 7 using height above sea level divided by 4300m as abscissa, obtain height above sea level correction factor with horizontal seat
The matched curve figure of relation between mark.
Step S132, according to formula Rmax=khR+ Δs R calculates maximum critical flashover distance Rmax, in above formula, R is arbitrary sudden strain of a muscle
The distance of network critical point to starting point, Δ R are to extend distance according to the flashover that the wind speed of electric power line pole tower installation region is determined.
Specifically, R is the distance of any one the flashover critical point to starting point calculated in the case of calm, namely above-mentioned
Flashover critical radius R calculated in embodiment.RmaxBe maximum critical flashover after with reference to height above sea level and air speed influence away from
From, namely maximum critical flashover radius.
Wind is a key factor for affecting flashover region to determine, in the presence of certain wind speed, the track that birds droppings falls
The descent path for being no longer along perpendicular with cross-arm 1 is fallen, but is occurred in that skew.When wind speed is more than 15m/s, continuously
Birds droppings descent path can be blown to four winds into discontinuous birds droppings descent path, at this moment, the air gap is difficult breakdown on the contrary.When
When wind speed is less than 15m/s, birds droppings will not typically be dispelled out, but, under certain wind speed and direction effect, birds droppings can be floated towards
The wire or grading ring of high potential, so as to shorten the air gap, therefore, it is determined that needing during flashover region to consider the shadow of wind speed
Ring.Also, the distance of birds droppings skew increases with the increase of wind speed, and when wind speed reaches 15m/s, the offset displacement of birds droppings is
2.0m.As the maximum wind velocity of high altitude localitiess is 15m/s, so, determined according to the wind speed of electric power line pole tower installation region
It is 2.0m that the flashover for going out extends distance, delta R.It is of course also possible to be carried out to the value that flashover extends distance, delta R according to practical situation
Any restriction is not done in adjustment, the present embodiment to this.
Step S133, will be by the maximum critical flashover distance R of starting point both sides prolongation to the left and rightmaxPosition afterwards is defined as left and right
Two maximum flashover critical points.
Specifically, maximum critical flashover distance RmaxNamely maximum critical flashover radius, will be origin by starting point O point, with
RmaxCircle is done for radius, the circle is designated as two maximum flashover critical points with two intersection points of x-axis, any one maximum flashover is critical
Point is maximum critical flashover distance R apart from the distance of starting pointmax。
4th determines sub-step S14, by the region between cross-arm and V-type insulator chain, faces positioned at two maximum flashovers
Part between boundary's point is defined as maximum flashover region.
Specifically, referring to Fig. 3, the parallel lines that y-axis is done in two maximum flashover critical points, two parallel lines and simulation cross-arm are crossed
The intersection point at 13 edges is designated as A respectively2、B2、C2、D2, then by A2-B2-C2-D2The rectangular area of composition, also, it is placed in cross-arm and V-type
Part between insulator chain is defined as maximum flashover region.
In the step of above-mentioned arrangement bird-proof device, i.e. deposition step S2, in the power transmission line for being placed in maximum flashover overlying regions
Bird-proof device is arranged on line pole tower.
As can be seen that in the present embodiment, according to the impact of shaft tower installation region height above sea level and wind speed, to flashover critical point
It is modified, determines the maximum flashover critical point in left and right two, various situations in actual motion can be covered so that dodge
The determination in network region is more accurate, farthest prevents the generation of flashover, significantly reduces transmission of electricity caused by birds droppings
The occurrence frequency of line flashover accident, and avoid bird-proof device installation waste caused by safety zone.
In above-described embodiment, the step of above-mentioned arrangement bird-proof device, i.e., deposition step S2 is further included：
When electric power line pole tower is tangent tower, on the cross-arm and earth wire support of tangent tower for being placed in flashover overlying regions
Bird-proof device is arranged.
Specifically, referring to Fig. 8, in the auxiliary material on the upper strata 13 of the main material 11 and cross-arm 1 on the upper strata 13 of the cross-arm 1 of tangent tower
12nd, the auxiliary material 12 of the lower floor 14 of the main material 11 and cross-arm 1 of the lower floor 14 of cross-arm 1, and earth wire support 6 on arrange anti-bird dress
Put.Bird-proof device can include：Bird-resistant 9 and/or bird-proof needle plate 10, that is to say, that bird-proof device can only arrange bird-resistant
9, it is also possible to which bird-proof needle plate 10 is only set, it is also possible to which bird-resistant 9 and bird-proof needle plate 10 are arranged simultaneously.
Referring to Figure 10 and Figure 11, for the main material 11 of the lower floor 14 of the main material 11 and cross-arm 1 on the upper strata 13 of cross-arm 1, if peace
Dress bird-resistant 9, can at least arrange row's bird-resistant 9 according to the width of main material 11；If installing bird-proof needle plate 10, two rows are at least arranged
Bird-proof needle plate 10.For the auxiliary material 12 of the lower floor 14 of the auxiliary material 12 and cross-arm 1 on the upper strata 13 of cross-arm 1, can be according to the width of auxiliary material 12
Degree arranges at least row's bird-resistant 9 and/or bird-proof needle plate 10.As earth wire support 6 is located at the top of cross-arm 1, so ground wire
Frame 6 to be corresponded to and should also arrange bird-proof device at flashover region 7.Bird-proof device is arranged in each position of earth wire support 6, that is, is existed
Bird-proof device is arranged on the upper strata of earth wire support 6, the oblique material of lower floor and side and horizontal tower material.
When electric power line pole tower is anchor support, on the cross-arm and ground wire cross-arm of the anchor support for being placed in flashover overlying regions
Bird-proof device is arranged.
Specifically, referring to Fig. 9, in the auxiliary material on the upper strata 13 of the main material 11 and cross-arm 1 on the upper strata 13 of the cross-arm 1 of anchor support
12nd, the auxiliary material 12 of the lower floor 14 of the main material 11 and cross-arm 1 of the lower floor 14 of cross-arm 1, the main material on the upper strata 81 of ground wire cross-arm 8 and ground wire
The auxiliary material of the lower floor 82 of the main material and ground wire cross-arm 8 of the lower floor 82 of the auxiliary material and ground wire cross-arm 8 on the upper strata 81 of cross-arm 8 is uniform
Put bird-proof device.Bird-proof device can include：Bird-resistant 9 and/or bird-proof needle plate 10, that is to say, that bird-proof device can only cloth
Put bird-resistant 9, it is also possible to only arrange bird-proof needle plate 10, it is also possible to which bird-resistant 9 and bird-proof needle plate 10 are arranged simultaneously.
Referring to Figure 10 and Figure 11, for the main material 11 of the lower floor 14 of the main material 11 and cross-arm 1 on the upper strata 13 of cross-arm 1, if peace
Dress bird-resistant 9, can at least arrange row's bird-resistant 9 according to the width of main material 11；If installing bird-proof needle plate 10, two rows are at least arranged
Bird-proof needle plate 10.For the auxiliary material 12 of the lower floor 14 of the auxiliary material 12 and cross-arm 1 on the upper strata 13 of cross-arm 1, can be according to the width of auxiliary material 12
Degree arranges at least row's bird-resistant 9 and/or bird-proof needle plate 10.
For the main material of the lower floor 82 of the main material and ground wire cross-arm 8 on the upper strata 81 of ground wire cross-arm 8, if installing bird-resistant 9, can
One row's bird-resistant 9 is at least arranged according to the width of main material；If installing bird-proof needle plate 10, two row's bird-proof needle plates 10 are at least arranged.It is right
In the auxiliary material of the lower floor 82 of the auxiliary material and ground wire cross-arm 8 on the upper strata 81 of ground wire cross-arm 8, at least one can be arranged according to the width of auxiliary material
Row's bird-resistant 9 and/or bird-proof needle plate 10.
As can be seen that in the present embodiment, by the position for limiting bird-proof device arrangement so that the installation of bird-proof device is more closed
Reason, it is to avoid the waste of bird-proof device, saves the installation cost of bird-proof device.
In sum, the present embodiment can accurately determine out the flashover region that flashover easily occurs below cross-arm, then
Bird-proof device is installed on the electric power line pole tower of flashover overlying regions so that the installation of bird-proof device is more reasonable, it is to avoid anti-bird
Device causes the installation of bird-proof device to waste installed in the region for being not susceptible to flashover, effectively reduces transmission line of electricity bar
The installation number of bird-proof device on tower, greatlys save the installation cost of bird-proof device, additionally it is possible to which being effectively reduced birds droppings causes
Transmission line of electricity flashover fault occurrence frequency, it is ensured that the safe operation of transmission line of electricity, also, bird-proof device is in flashover region
Arrange, be easy to operation of the staff to electric power line pole tower.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (8)
1. a kind of method for arranging of high altitude localitiess DC transmission line line pole tower bird-proof device, it is characterised in that including following step
Suddenly：
Birds droppings is sprayed in the diverse location of electric power line pole tower cross-arm to below the cross-arm, carry out birds droppings flashover test, and will
The region that flashover occurs is defined as flashover region；
Bird-proof device is arranged being placed on the electric power line pole tower of the flashover overlying regions.
2. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 1, its feature
Be, it is described determination flashover region the step of further include：
Using the joint of the line of symmetry of the V-type insulator chain below the cross-arm and the cross-arm as starting point, in the cross-arm
On by birds droppings is sprayed below the starting point to the left and right cross-arm of both sides, and carry out birds droppings flashover test, and flashover will not occur
Position corresponding to phenomenon is identified as the two flashover critical points in left and right；
By the part in the region between the cross-arm and the V-type insulator chain, between two flashover critical points
It is defined as flashover region.
3. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 2, its feature
It is,
The step of determination flashover region, further comprises：
According to the height above sea level and wind speed of the electric power line pole tower installation region, the two flashover critical points in left and right are repaiied
Just, it is determined that the maximum flashover critical point in left and right two；
By in the region between the cross-arm and the V-type insulator chain, between two maximum flashover critical points
Part is defined as maximum flashover region；
In the step of arrangement bird-proof device, cloth on the electric power line pole tower of the maximum flashover overlying regions is being placed in
Put bird-proof device.
4. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 3, its feature
It is, it is described to further include the step of determine the maximum flashover critical point in left and right two：
According to formulaCalculate height above sea level correction factor kh, in above formula, H is the transmission of electricity
The height above sea level of overhead line structures installation region；
According to formula Rmax=khR+ Δs R calculates maximum critical flashover distance Rmax, in above formula, R be arbitrary flashover critical point extremely
The distance of the starting point, Δ R are to extend distance according to the flashover that the wind speed of the electric power line pole tower installation region is determined；
Will be by the maximum critical flashover distance R of starting point both sides prolongation to the left and rightmaxPosition afterwards is defined as the maximum sudden strain of a muscle in left and right two
Network critical point.
5. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 4, its feature
It is that the flashover that the wind speed according to electric power line pole tower installation region is determined extends distance, delta R for 2.0m.
6. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 1, its feature
Be, it is described arrangement bird-proof device the step of further include：
When the electric power line pole tower is tangent tower, in the cross-arm and ground of the tangent tower for being placed in the flashover overlying regions
Bird-proof device is arranged on line bracket；
When the electric power line pole tower is anchor support, in the cross-arm and ground of the anchor support for being placed in the flashover overlying regions
Bird-proof device is arranged on line cross-arm.
7. the method for arranging of DC transmission line line pole tower bird-proof device in high altitude localitiess according to claim 6, its feature
It is,
When the electric power line pole tower is tangent tower, in the main material and auxiliary material and the ground wire of the upper and lower of cross-arm
Support arranges the bird-proof device；
When the electric power line pole tower is anchor support, in the main material and auxiliary material and ground wire cross-arm of the upper and lower of cross-arm
The upper and lower main material and auxiliary material arrange the bird-proof device.
8. the method for arranging of the high altitude localitiess DC transmission line line pole tower bird-proof device according to claim 6 or 7, which is special
Levy and be, the bird-proof device includes：Bird-resistant and/or bird-proof needle plate.
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| CN108181079A (en) * | 2017-12-21 | 2018-06-19 | 浙江大学 | A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances |
| CN115856555A (en) * | 2023-02-27 | 2023-03-28 | 国网江西省电力有限公司电力科学研究院 | Method for defining and preventing foreign body flashover risk area of isolating switch |
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| JPH08298714A (en) * | 1995-04-24 | 1996-11-12 | Chugoku Electric Power Co Inc:The | Nest building prevention device and tension structure of gut in the device |
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| CN108181079B (en) * | 2017-12-21 | 2019-05-28 | 浙江大学 | A kind of power transmission tower cross-arm Shape Coefficient air tunnel testing device based on double balances |
| CN115856555A (en) * | 2023-02-27 | 2023-03-28 | 国网江西省电力有限公司电力科学研究院 | Method for defining and preventing foreign body flashover risk area of isolating switch |
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