CN102721371A - Device and method for calculating sag of power transmission line - Google Patents

Device and method for calculating sag of power transmission line Download PDF

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Publication number
CN102721371A
CN102721371A CN2012102255858A CN201210225585A CN102721371A CN 102721371 A CN102721371 A CN 102721371A CN 2012102255858 A CN2012102255858 A CN 2012102255858A CN 201210225585 A CN201210225585 A CN 201210225585A CN 102721371 A CN102721371 A CN 102721371A
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CN
China
Prior art keywords
transmission line
power transmission
sag
shaft tower
helicopter
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CN2012102255858A
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Chinese (zh)
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CN102721371B (en
Inventor
赵振兵
张博雅
苏子彬
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华北电力大学(保定)
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Priority to CN201210225585.8A priority Critical patent/CN102721371B/en
Publication of CN102721371A publication Critical patent/CN102721371A/en
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Abstract

The invention discloses a device and a method for calculating the sag of a power transmission line in the technical field of laser measurement. The device comprises a GPS (global positioning system), a height calculating helicopter, a holder, a rangefinder and a computing module; the holder is fixed in the helicopter; and the rangefinder is fixed on the holder and is connected with the computing module. The required data are measured by the laser rangefinder under conditions with no power failure, hiking ground operations are avoided, and the working hours and labor intensity of sag measurement are reduced; and the problems of complex operations, low efficiency and low accuracy in sag measurement are solved effectively.

Description

A kind of power transmission line sag calculation element and method
Technical field
The invention belongs to the laser measuring technique field, relate in particular to a kind of power transmission line sag calculation element and method.
Background technology
The sag of transmission line of electricity is circuit operation and the important parameter safeguarded, and it is significant regularly the sag that sets up power transmission line to be carried out the get it right security of operation of circuit of meter.Existing computing method mainly rely on technician's ground artificial measurement on foot; The method receives factor affecting such as geography and physical environment bigger; Section with a varied topography along the line for transmission line of electricity, that geographical environment is abominable, operating difficulties, the big and inefficiency of error.
A kind of power transmission line sag computing method based on laser range finder are provided, the range observation that utilizes helicopter to use laser range finder to be correlated with in the air by the technician at height, and realize the calculating of sag through new method.Effectively solve sag measuring operation complicacy under the abominable situation of transmission line of electricity geographical environment along the line, efficient is low, the difficult problem of poor accuracy.
Summary of the invention
Deficiencies such as the existing power transmission line sag measuring operation to mentioning in the above-mentioned background technology is complicated, efficient is low the present invention proposes a kind of power transmission line sag calculation element and method.
Technical scheme of the present invention is that a kind of power transmission line sag calculation element is installed on the helicopter that GPS positioning system and altitude gauge are housed, and it is characterized in that this device comprises The Cloud Terrace, stadimeter and computing module;
Said The Cloud Terrace is fixed in the helicopter; Stadimeter is fixed on the The Cloud Terrace, and is connected with computing module.
Said stadimeter is the mirror laser range finder of looking in the distance.
Said The Cloud Terrace is manual The Cloud Terrace.
A kind of method of calculating the power transmission line sag is used to calculate the sag of power transmission line between two shaft towers, it is characterized in that this method may further comprise the steps:
Step 1: obtain distance and the hitch point altitude information of power transmission line on two shaft towers between two shaft towers;
Step 2: set up three-dimensional system of coordinate according to two shaft towers, helicopter is hovered over the assigned address of this three-dimensional system of coordinate;
Step 3: on the basis of step 1, adjustment The Cloud Terrace and stadimeter are measured said assigned address respectively to the distance between power transmission line sag point and each the shaft tower power transmission line hitch point;
Step 4: on the basis of step 3, utilize computing module to try to achieve the power transmission line sag.
The plane that the top constituted of said assigned address and two shaft towers and the angle of surface level are 20 ° to 60 °, and the angle of the line of the top of two shaft towers and helicopter is 60 ° to 120 °, and said assigned address is positioned at more than the shaft tower line top.
The calculation procedure of said power transmission line sag is:
A. divide two shaft tower power transmission line hitch points etc. high with two shaft tower power transmission line hitch points distance overhead such as two kinds of situation calculating power transmission line sag points such as height such as grade not;
B. when two shaft tower power transmission line hitch points etc. were high, the computing formula of sag was:
f 1=b-c
Wherein:
f 1Be the sags when high such as two shaft tower power transmission line hitch points;
B is the height value of two shaft tower power transmission line hitch points;
C is power transmission line sag point distance overhead;
C. do not wait when high when two shaft tower power transmission line hitch points, the computing formula of sag is:
f 2 = 1 2 ( d + b 3 ) - c
Wherein:
f 2Be that two shaft tower power transmission line hitch points do not wait the sag when high;
D is the height value of a shaft tower power transmission line hitch point;
b 3Height value for another shaft tower power transmission line hitch point.
Provide the new method of a kind of usefulness to calculate the device and method of sag, utilize laser range finder under situation about not having a power failure, to measure desired data, easy to operate, accuracy good; Realize aerological measurement through helicopter; Avoided Ground Operation on foot; Man-hour and labour intensity that sag is measured have been reduced; The calculating of the power transmission line sag on the section especially with a varied topography along the line for mountain valley, rivers etc., that geographical environment is abominable is significant, efficiently solves it because the sag measuring operation that current difficulty causes is complicated, and efficient is low, the difficult problem of poor accuracy.Difference based on actual conditions is divided into two kinds of situation with computational methods, for height such as two hitch points on the power transmission line and not situation such as height such as grade measure respectively, improve the accuracy of result of calculation, for the safe operation of circuit provides safeguard.
Description of drawings
Fig. 1 is transmission line of electricity sag instrumentation plan under the high situation such as the present invention's two shaft tower hitch points;
Fig. 2 does not wait transmission line of electricity sag instrumentation plan under the high situation for the present invention's two shaft tower hitch points.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
A kind of power transmission line sag computing method based on laser range finder comprise: the helicopter of altitude gauge and GPS positioning system is housed, manual The Cloud Terrace, the mirror of looking in the distance laser range finder, the computing module that is connected with laser range finder.
Load The Cloud Terrace in the helicopter, the mirror of looking in the distance laser range finder and the computing module that is connected with laser range finder.For the transmission line of electricity that has set up; The position of the hitch point height of power transmission line and two shaft towers all can be looked on the shaft tower; Thereby can utilize the GPS positioning system with helicopter in hover with the plane that the top constituted of two shaft towers and the angle of surface level be 20 ° to 60 °; And the angle of the top of two shaft towers and the line of helicopter is 60 ° to 120 °; And be positioned at above position, shaft tower line top, so that relevant range observation, the position of the hitch point height of power transmission line and two shaft towers all can be looked on the shaft tower.The Cloud Terrace is fixed in the helicopter; Laser range finder is fixedly mounted on the The Cloud Terrace; The manually rotation of control The Cloud Terrace horizontal direction and vertical direction when the cross chevilled silk on the laser range finder eyepiece of its carrying aims at the mark, utilizes laser range finder to find range and record.Utilize the altitude gauge in the helicopter, draw the height off the ground of helicopter, and then obtain the height off the ground of helicopter inner laser stadimeter.Computing method are enrolled in the computing module, and computing module is connected with laser range finder through interface, and the measurement result of laser range finder is transported in the computing module, can calculate sag.Computing method according to the actual conditions difference be divided into hitch point on two shaft towers etc. high with two kinds of height such as grade not, below two kinds of situation are described respectively:
One, high situation such as hitch point
The right hand rectangular coordinate system in space of setting up as shown in Figure 1; The geometric center that contacts with ground with shaft tower 1 is initial point O; Cross some O and make three number axis perpendicular to each other; Wherein the direction at the center of the central horizontal of shaft tower 1 sensing shaft tower 2 is the x direction of principal axis, and the direction that initial point O points to the head of mast is the z direction of principal axis, and vertical direction inwards with the xOy plane is the y direction of principal axis.E (x among the figure; Y; Z) be the position at laser range finder place in the helicopter, its coordinate satisfies 0 < x < a, y 0, z b, and between the AEB angle greater than 60 ° and less than 120 °; The angle of plane AEB and surface level is 20 ° to 60 °, make be fixed on the laser range finder that can make its carrying in the angular range that the The Cloud Terrace in the helicopter allows to rotate with vertical direction in the horizontal direction scan on the power transmission line more arbitrarily.The value of reading helicopter inner height meter makes z known, and A, B are two hitch points, and two shaft towers are all known apart from a and hitch point height off the ground b.
Rotary platform makes that at first the cross chevilled silk on the laser range finder eyepiece is aimed at A, B 2 points respectively, and measures its distance to 2, is designated as d 1, d 2The Laser Measurement stadimeter arrives the distance of this grade lead minimum point again: the cross chevilled silk on the eyepiece is aimed at the outer any rear flank along continuous straight runs of lead shelves at the uniform velocity scan to opposite side; If have and scan lead twice, then The Cloud Terrace is rotated a minimum angles (minimum angles is preferably the running accuracy of The Cloud Terrace, such as 0.01 degree) vertically downward in the scanning process; The outer opposite side scanning of along continuous straight runs guiding line shelves again; Up to the point that on the certain level face, can only once scan on the power transmission line, this point promptly is the minimum point of this grade lead, is designated as the G point; The distance that this moment, the Laser Measurement stadimeter was ordered to G is designated as d 3The G point is sag (i.e. GH among the figure) to the distance of the pedal line of A, B line, is designated as f.When lead hitch point etc. was high, maximum sag equated to two shaft towers distance in span central authorities in promptly G o'clock in the shelves, was 0.5a, then the G point coordinate be (0.5a, 0, c).
Utilize above known conditions and relevant geometric knowledge can calculate the sag of power transmission line under the high situation such as hitch point, concrete computing method are following:
The AE distance is d 1, that is: x 2+ y 2+ (z-b) 2=d 1 2
The BE distance is d 2, that is: ( x - a ) 2 + y 2 + ( z - b ) 2 = d 2 2
The EG distance is d 3, that is: ( x - 1 2 a ) 2 y 2 + ( z - c ) 2 = d 3 2
Separate system of equations that above three formulas constitute get final product the value of x, y, c, thereby sag f 1=b-c can get.
Two, hitch point does not wait high situation
As shown in Figure 2 using with above-mentioned same method set up rectangular coordinate system in space, the helicopter in hover position choice need satisfy following some: (1) is in coordinate system in first octant; (2) in the plane of x=0.5a, guarantee that through the location helicopter in hover certain in the plane of x=0.5a a bit according to the position of two shaft tower hitch points GPS positioning system capable of using; (3) (x, y are the position at laser range finder place in the helicopter z) to E, and its coordinate satisfies 0<x<a, y>0, z>b 3, and angle is greater than 60 ° and less than 120 ° between the AEB, and the angle of plane AEB and surface level is 20 ° to 60 °, can scan minimum point and two hitch points on the power transmission line to guarantee the laser range finder that is fixed in the helicopter.Behind the position with helicopter in hover requirement more than satisfying, utilize altitude gauge can make that z is known like this; A, B are two hitch points, and two shaft towers are all known apart from a and hitch point height off the ground b, d.
Rotary platform makes that at first the cross chevilled silk on the laser range finder eyepiece is aimed at A, B 2 points respectively, and measures its distance to 2, is designated as d 1, d 2Adjustment The Cloud Terrace angle makes it over against power transmission line.The control The Cloud Terrace rotates in vertical direction, and the cross chevilled silk on the laser range finder eyepiece of its carrying scans on the power transmission line, and the point that note is aimed at is the distance that G point and Laser Measurement stadimeter are ordered to G, is designated as d 3Because helicopter in hover is in the plane of x=0.5a, and The Cloud Terrace can know that over against power transmission line vertical scanning the G point is two shaft tower mid points, its coordinate be (0.5a, 0, c).Because when the lead hitch point does not wait height when (absolute altitude does not wait), maximum sag appears at the span centre in grade, can know the G point to the pedal line of A, B line be sag apart from GH, be designated as f 2
Utilize above known conditions and relevant geometric knowledge can calculate the sag of power transmission line under the high situation such as hitch point, concrete computing method are following:
The AE distance is d 1, that is: x 2+ y 2+ (z-b 3) 2=d 1 2
The BE distance is d 2, that is: ( x - a ) 2 + y 2 + ( z - b ) 2 = d 2 2
The EG distance is d 3, that is: ( x - 1 2 a ) 2 y 2 + ( z - c ) 2 = d 3 2
Separate system of equations that above three formulas constitute get final product the value of x, y, c, thereby sag can get.
A kind of power transmission line sag computing method based on laser range finder comprise: the helicopter of altitude gauge and GPS positioning system is housed, manual The Cloud Terrace, the mirror of looking in the distance laser range finder, the computing module that is connected with laser range finder.The position of at first from electric power enterprise, finding on the shaft tower two hitch point height and two shaft towers on the power transmission line is as precondition, and the height value of two hitch points manually is input in the computing module.With helicopter E hover in the rectangular coordinate system of setting up like Fig. 1, Fig. 2 that coordinate satisfies 0 < x < a, y 0, z b; And angle is greater than 60 ° and be 20 ° to 60 ° appropriate location less than the angle of 120 °, plane AEB and surface level, so that relevant range observation between the AEB.Do not wait high situation for hitch point, also will utilize the GPS positioning system to guarantee that according to the position of two shaft towers helicopter in hover is in the plane of x=0.5a.After having confirmed the position of helicopter, The Cloud Terrace is horizontally fixed in the helicopter, and laser range finder is fixedly mounted on the The Cloud Terrace.Utilize the altitude gauge in the helicopter, draw the height off the ground of helicopter, be approximately the height off the ground (z) of helicopter inner laser stadimeter.The height value of reading (z) manually is input in the computing module, as the necessary condition of calculating sag.The manually rotation of control The Cloud Terrace horizontal direction and vertical direction, thus the point that the cross chevilled silk on the laser range finder eyepiece is aimed at changes thereupon, when it scans A, B, utilizes laser range finder to measure the distance that it arrives 2 of A, B at 2, is designated as d respectively 1, d 2Measure d according to the difference of hitch point difference in height on the power transmission line with the different operation method again 3: if height such as two hitch points is aimed at the outer any rear flank along continuous straight runs of lead shelves at the uniform velocity to opposite side scanning with the cross chevilled silk on the eyepiece, scan lead twice if having in the scanning process; (minimum angles is preferably the running accuracy of The Cloud Terrace then The Cloud Terrace to be rotated a minimum angles vertically downward; Such as 0.01 degree), the outer opposite side scanning of along continuous straight runs guiding line shelves again is up to the point that on the certain level face, can only once scan on the power transmission line; This point promptly is the minimum point of this grade lead; Be designated as the G point, the distance that this moment, the Laser Measurement stadimeter was ordered to G is designated as d 3If two hitch points do not wait high, adjustment The Cloud Terrace angle makes it over against power transmission line.The control The Cloud Terrace rotates in vertical direction, and the cross chevilled silk on the laser range finder eyepiece of its carrying scans on the power transmission line, and the point that note is aimed at is the distance that G point and Laser Measurement stadimeter are ordered to G, is designated as d 3Laser range finder is connected with computing module through interface, when laser range finder measures d respectively 1, d 2, d 3Value the time, measurement result is transported in the computing module through interface, as the necessary condition of calculating.Sag computing formula according to deriving is enrolled computing method in the computing module, again through input d 1, d 2, d 3, z value and shaft tower on the height value of two hitch points on the power transmission line, computing module promptly capable of using calculates the sag on the power transmission line.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.

Claims (6)

1. a power transmission line sag calculation element is installed on the helicopter that GPS positioning system and altitude gauge are housed, and it is characterized in that this device comprises The Cloud Terrace, stadimeter and computing module;
Said The Cloud Terrace is fixed in the helicopter; Stadimeter is fixed on the The Cloud Terrace, and is connected with computing module.
2. a kind of power transmission line sag computing module according to claim 1 is characterized in that said stadimeter is the mirror laser range finder of looking in the distance.
3. a kind of power transmission line sag computing module according to claim 1 is characterized in that said The Cloud Terrace is manual The Cloud Terrace.
4. method of utilizing the said device of claim 1 to calculate the power transmission line sag is used to calculate the sag of power transmission line between two shaft towers, it is characterized in that this method may further comprise the steps:
Step 1: obtain distance and the hitch point altitude information of power transmission line on two shaft towers between two shaft towers;
Step 2: set up three-dimensional system of coordinate according to two shaft towers, helicopter is hovered over the assigned address of this three-dimensional system of coordinate;
Step 3: on the basis of step 1, adjustment The Cloud Terrace and stadimeter are measured said assigned address respectively to the distance between power transmission line sag point and each the shaft tower power transmission line hitch point;
Step 4: on the basis of step 3, utilize computing module to try to achieve the power transmission line sag.
5. a kind of power transmission line sag computing method according to claim 4; It is characterized in that the plane that the top constituted of said assigned address and two shaft towers and the angle of surface level are 20 ° to 60 °; And the angle of the top of two shaft towers and the line of helicopter is 60 ° to 120 °, and said assigned address is positioned at more than the shaft tower line top.
6. a kind of power transmission line sag computing method according to claim 4 is characterized in that the calculation procedure of said power transmission line sag is:
A. divide two shaft tower power transmission line hitch points etc. high with two shaft tower power transmission line hitch points distance overhead such as two kinds of situation calculating power transmission line sag points such as height such as grade not;
B. when two shaft tower power transmission line hitch points etc. were high, the computing formula of sag was:
f 1=b-c
Wherein:
f 1Be the sags when high such as two shaft tower power transmission line hitch points;
B is the height value of two shaft tower power transmission line hitch points;
C is power transmission line sag point distance overhead;
C. do not wait when high when two shaft tower power transmission line hitch points, the computing formula of sag is:
f 2 = 1 2 ( d + b 3 ) - c
Wherein:
f 2Be that two shaft tower power transmission line hitch points do not wait the sag when high;
D is the height value of a shaft tower power transmission line hitch point;
b 3Height value for another shaft tower power transmission line hitch point.
CN201210225585.8A 2012-07-03 2012-07-03 Method for calculating sag of power transmission line CN102721371B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104535043A (en) * 2015-01-17 2015-04-22 国家电网公司 Power line safety distance measurement evaluation method based on smart phone
CN106123848A (en) * 2016-06-28 2016-11-16 陕西科技大学 A kind of measuring method of conducting wire sag
CN106871837A (en) * 2017-02-13 2017-06-20 郑州信工智能化系统有限公司 Sag measuring method and device
CN106885524A (en) * 2017-02-22 2017-06-23 国网新疆电力公司信息通信公司 The detection method and device of the sag height of optical cable
CN108844467A (en) * 2018-04-24 2018-11-20 四川汇源光通信有限公司 Arc sag based on laser three-D reconstruct monitors system and method
CN109458936A (en) * 2018-12-11 2019-03-12 中国南方电网有限责任公司超高压输电公司检修试验中心 A kind of power transmission line sag accurate measurement method based on laser point cloud data
CN109489536A (en) * 2018-04-19 2019-03-19 国网浙江省电力有限公司金华供电公司 A kind of power transmission line sag automatic checkout system and method
CN110906872A (en) * 2019-11-29 2020-03-24 河南送变电建设有限公司 Method for observing and adjusting lead through high-efficiency gear side sag

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JPH02306102A (en) * 1989-02-15 1990-12-19 Hitachi Cable Ltd Sag measuring method and tightening method for transmission line and tool therefor
US6229451B1 (en) * 1998-02-13 2001-05-08 Linesoft Corporation Apparatus and method of monitoring a power transmission line
CN202709994U (en) * 2012-07-03 2013-01-30 华北电力大学(保定) Transmission line sag calculation device

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104535043A (en) * 2015-01-17 2015-04-22 国家电网公司 Power line safety distance measurement evaluation method based on smart phone
CN106123848A (en) * 2016-06-28 2016-11-16 陕西科技大学 A kind of measuring method of conducting wire sag
CN106123848B (en) * 2016-06-28 2018-11-13 陕西科技大学 A kind of measurement method of conducting wire sag
CN106871837A (en) * 2017-02-13 2017-06-20 郑州信工智能化系统有限公司 Sag measuring method and device
CN106871837B (en) * 2017-02-13 2019-06-14 郑州信工智能化系统有限公司 Arc sag measurement method and device
CN106885524A (en) * 2017-02-22 2017-06-23 国网新疆电力公司信息通信公司 The detection method and device of the sag height of optical cable
CN109489536A (en) * 2018-04-19 2019-03-19 国网浙江省电力有限公司金华供电公司 A kind of power transmission line sag automatic checkout system and method
CN108844467A (en) * 2018-04-24 2018-11-20 四川汇源光通信有限公司 Arc sag based on laser three-D reconstruct monitors system and method
CN109458936A (en) * 2018-12-11 2019-03-12 中国南方电网有限责任公司超高压输电公司检修试验中心 A kind of power transmission line sag accurate measurement method based on laser point cloud data
CN110906872A (en) * 2019-11-29 2020-03-24 河南送变电建设有限公司 Method for observing and adjusting lead through high-efficiency gear side sag

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