CN109768500A - An Equipotential Working Path Planning Method for UHV AC Line Tension Tower Basket Method Considering Environmental Factors - Google Patents

An Equipotential Working Path Planning Method for UHV AC Line Tension Tower Basket Method Considering Environmental Factors Download PDF

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CN109768500A
CN109768500A CN201910096057.9A CN201910096057A CN109768500A CN 109768500 A CN109768500 A CN 109768500A CN 201910096057 A CN201910096057 A CN 201910096057A CN 109768500 A CN109768500 A CN 109768500A
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point
rope
field strength
equipotential
hanging basket
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CN109768500B (en
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智李
沈艳军
张宇娇
黄雄峰
姜岚
苏攀
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Anhui Wanqi Tiancheng Technology Co ltd
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China Three Gorges University CTGU
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Abstract

A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work paths planning method considering environmental factor, pass through the measurement of the meteorologic parameter to ultrahigh voltage alternating current transmission lines anchor support livewire work shaft tower geographic location, air humidity H, the environment temperature T when operation and air pressure P at that time are obtained, obtains the relative dielectric constant of air；It determines the position of the equipotential live line work personnel in hanging basket, electric Field Calculation then is carried out to the body surface field strength of each operation track point；And the body surface field strength of each setting is compared with the critical bloom field strength of conducting wire, ten operation track points are finally determined, meet the requirements ten operation track low spots are linked to be a camber line and obtain extra-high voltage AC circuit anchor support hanging basket method equipotential live line work planning path.This method considers operation shaft tower environmental factor, for the hanging basket method equipotential live line work path that ultrahigh voltage alternating current transmission lines anchor support is cooked up, carries out providing theoretical foundation and guidance for the safety of livewire work.

Description

A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential work considering environmental factor Industry paths planning method
Technical field
A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work path planning for considering environmental factor of the present invention Method is related to extra-high work transmission line and hanging basket method equipotential live line work Path Planning Technique field.
Background technique
Equipotential live line work mode is most widely used in high voltage transmission line live work with its technical advantage, but in spy On HVAC power transmission line when livewire work, since the working voltage of ultrahigh voltage alternating current transmission lines is high, around electrical body Electric field strength is high, and UHV transmission line is long, geographical along the line, climatic environment complexity, and influence suffered by operating personnel's safety is bigger, Therefore live-working safety distance, combinational gap, operating personnel need to be passed in and out equipotential best mode etc. and studied.Hanging basket method Equipotential live line work is one kind of livewire work mode, and in UHV transmission line engineering, hanging basket method operation is realized equipotential Process is that operating personnel wears screening clothing and is sitting in insulation hanging basket, and staff the electricity such as controls by adjusting both ends rope length on tower The position of position operating personnel makes equipotential live line work personnel reach the mistake that conducting wire realizes equipotential live line work from a certain position of cross arm of tower Journey.The operation mode is widely used in livewire work at present, but its mode for entering strong electrical field and path planning affect work The safety of industry personnel.
Currently, ultrahigh voltage alternating current transmission lines anchor support, mode that is theoretical and entering field strength in practice is usually along strain insulator Insulator chain is using " entering electric field across two short three " methods, also known as " free equipotential " method, but using must be to strain insulator-string institute before this method There is strain insulator porcelain insulator to carry out live zero measure (determining that the intact insulator of strain insulator-string meets regulatory requirements), is using the method Before, (glass insulator can not have to detection) need to be detected to insulator, during traveling, foot need to step on an insulator string, Hand steered another string, trick synchronous horizontal is mobile, avoids movement to spend as far as possible big.The method is in 500kV extra high voltage network band It has been widely adopted in electric operation.But due to UHV transmission line own characteristic, so that this method is difficult to be used. The problem is that:
(1): the above are porcelain insulators for extra high voltage line anchor support 80%, and insulator chain length is more than 15 meters, and detection is tired It is difficult；
(2): insulator chain spacing is excessive, and two insulator string horizontal distances are generally more than 60 centimetres, and heavy icing area is even more to reach To 1 meter.Operating personnel will be with the posture transverse shifting of similar push-up successively across 70 multi-disc insulators, and difficulty is very big.
Summary of the invention
Against the above deficiency, the invention proposes a kind of extra-high voltage AC circuit anchor support hanging basket methods for considering environmental factor Equipotential live line work paths planning method, this method are directed to UHV transmission line anchor support, enter strong electrical field using hanging basket method Mode, and the change of environmental factor is considered, under the premise of equipotential live line work personnel's filed intensity on body surface meets electric field requirement, for A kind of equipotential live line work path for entering strong electrical field using hanging basket method that ultrahigh voltage alternating current transmission lines anchor support is cooked up is band The safety of electric operation carries out providing theoretical foundation and guidance.
The technical scheme adopted by the invention is as follows:
A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work paths planning method considering environmental factor, leads to The measurement for crossing the meteorologic parameter to ultrahigh voltage alternating current transmission lines anchor support livewire work shaft tower geographic location, obtains operation When air humidity H, environment temperature T and air pressure P at that time, obtain the relative dielectric constant of air on this basis；Pass through work The determination of industry rope length and the judgement of combinational gap, to primarily determine the position of the equipotential live line work personnel in hanging basket, then Electric Field Calculation is carried out to the body surface field strength of each operation track point；And by the body surface field strength of each setting with The critical bloom field strength of conducting wire is compared, and finally determines ten operation track points, by meet the requirements ten operation tracks Low spot is linked to be a camber line to get extra-high voltage AC circuit hanging basket method equipotential live line work planning path is arrived.
Equipotential live line work process is to realize that operating personnel jumps firmly from cross-arm position to ultrahigh voltage alternating current transmission lines anchor support Process on line, operating personnel reach at hard wire jumper, need to climb from hard wire jumper to ultrahigh voltage alternating current transmission lines anchor support On conducting wire.
A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work paths planning method considering environmental factor, packet Include following steps:
Step 1: air humidity H, the environment temperature T and air pressure P at that time of measurement operation shaft tower geographic location；
Step 2: the relative dielectric constant ε and air humidity, temperature, the relationship of air pressure of air, the opposite dielectric of air are normal Number ε becomes larger with the increase of air humidity, reduces as the temperature increases, increases with the increase of air pressure；
Step 3: determining operation shaft tower coordinate system, rope length is determined as coordinate origin using shaft tower central point where operation cross-arm L1 and L2, rope length L2 length are equal to the sum of length and fitting length of suspension insulator, L2 rope length are ensured in operation process not Become, L1 is variation in operation process, makes rope lengthThe angle θ is the angle of cross arm of tower and rope L2；Rope Sub- L2 hanging point is located at the cross-arm of suspension insulator normal position, and rope L1 hanging point is equal to L2 apart from rope L2 hanging point distance Rope length；Before equipotential live line work starts, equipotential live line work personnel are located at the hanging point of rope L1, and are sitting in hanging basket, then discharge Rope length L1, taking the angle θ is 10 °, makes rope lengthIt determines at first operation track point, in the operation track Point, the position of operating personnel in space in hanging basket need to meet formula (1)
The S1+S3 and S2+S3 for calculating spatial position are met the requirements if distance is all larger than 6.9m at this time, if apart from full Foot requires, and calculates the electric field strength E that equipotential live line work personnel are in the point.By the way that φ can be found out to formula (2), by what is found out φ substitutes into formula (3), can find out the filed intensity on body surface E for the equipotential live line work personnel being positioned in the space.
In formula:For laplacian；
φ is current potential scalar；
ρ is free charge density；
ε is the relative dielectric constant of air；
X, y, z are the rectangular co-ordinate where the medium positioning operation personnel in space；
E is equipotential live line work personnel body surface electric field strength.
The operation track point of selection, need to meet formula (1) and electric field strength E simultaneously need to be less than the critical bloom field strength of conducting wire Ecr.Make to wear critical that the equipotential live line work personnel of shading ring are less than conducting wire in the filed intensity on body surface of the point in insulation hanging basket It has stage fright strong, to guarantee that the safety of equipotential live line work personnel, the critical bloom field strength of conducting wire are calculated by formula (4)
δ is the relative density of air in formula (4)；
r0For the radius of bloom conducting wire, cm；
M is the coefficient of regime of conductive line surfaces, and value is 0.8~1.0.
Step 4 determines remaining 8 working paths planning point, by the determination side of first operation track point in step 3 Method makes the angle θ successively be equal to 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 °, makes rope length according to the angle θ 10 ° of method incremented by successivelyTo determine second, third, the 4th, the 5th, the 6th, the 7th, the 8th working path Point.The determination of 9th working path point, the operating personnel in hanging basket reaches the position of conducting wire level in vertical direction at this time, Horizontal position is from conducting wire 0.5m, and the angle of rope length L2 and suspension insulator is α at this time,The then work θ=90 °-the α of industry tracing point, makes rope lengthTo determine the 9th working path point.Each tracing point is pressed After operation rope length determines job position, the value of the S1+S3 and S2+S3 of spatial position are calculated, whether checking computations meet formula (1) With the requirement of electric field strength.If above ten operation track points are all satisfied the requirement of formula (1) and electric field strength by verifying, Above ten operation track points can be connected it is into a line, be extra-high voltage AC circuit hanging basket method equipotential live line work planning work Industry path.
A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work path planning for considering environmental factor of the present invention Method, it is contemplated that operation shaft tower environmental factor, under the premise of operating personnel's filed intensity on body surface electric field meets electric field requirement, for spy The hanging basket method equipotential live line work path that HVAC power transmission line anchor support is cooked up carries out providing reason for the safety of livewire work By foundation and guidance.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is anchor support hanging basket method operation overall model figure.
Fig. 2 is the equipotential live line work personnel spatial position figure in anchor support hanging basket.
Fig. 3 is the operation of anchor support hanging basket method from hard wire jumper 0.5m job position figure.
Fig. 4 is the anchor support hanging basket method equipotential live line work location drawing.
Body surface electric field strength FEM calculation cloud atlas when Fig. 5 is anchor support hanging basket method equipotential live line work.
Fig. 6 straight corner anchor support hanging basket method operation overall model figure.
Equipotential live line work personnel spatial position figure in Fig. 7 straight corner anchor support hanging basket.
Fig. 8 straight corner anchor support hanging basket method operation is from conducting wire 0.5m job position figure.
Fig. 9 straight corner anchor support hanging basket method equipotential live line work location drawing.
Body surface field strength FEM calculation cloud atlas when Figure 10 straight corner anchor support hanging basket method operation equipotential.
Specific embodiment
A kind of extra-high voltage AC circuit anchor support hanging basket method equipotential live line work paths planning method considering environmental factor, leads to The measurement for crossing the meteorologic parameter to ultrahigh voltage alternating current transmission lines livewire work shaft tower geographic location, obtains sky when operation Air humidity degree H, environment temperature T and air pressure P at that time, obtain the relative dielectric constant of air on this basis；Pass through operation rope length Determination and combinational gap judgement, to primarily determine the position of the equipotential live line work personnel in hanging basket, then to each The body surface field strength of a operation track point carries out electric Field Calculation；And by the body surface field strength of each setting and conducting wire Critical bloom field strength is compared, and finally determines ten operation track points, and meet the requirements ten operation track low spots are connected Extra-high voltage AC circuit hanging basket method equipotential live line work planning path is obtained at a camber line.For certain ultra-high voltage AC transmission Route design parameter establishes the cross arm of tower of ultrahigh voltage alternating current transmission lines, hanging basket, human body, absolutely according to specific geometric dimension Parameter value is substituted into the calculating for carrying out rope, and carries out equipotential live line work personnel's filed intensity on body surface by edge, conducting wire, fitting model It calculates, the planning path of the UHV transmission line hanging basket method equipotential live line work of a consideration environmental factor can be obtained.
Specifically includes the following steps:
1) air humidity H, the environment temperature T and air pressure P at that time of operation shaft tower geographic location, are measured；
2), the relative dielectric constant ε of air and air humidity, temperature, the relationship of air pressure, the relative dielectric constant ε of air Become larger with the increase of air humidity, reduce as the temperature increases, increases with the increase of air pressure；Specific data are such as Shown in table 1, table 2；
The relative dielectric constant ε and temperature, the relationship of air pressure of 1 air of table
The relative dielectric constant ε and humidity, the relationship of air pressure of 2 air of table
3), determine operation shaft tower coordinate system, using shaft tower central point where operation cross-arm as coordinate origin, determine rope length L1 and L2, rope length L2 length are equal to the sum of length and fitting length of suspension insulator, ensure that L2 rope length is constant in operation process, L1 is variation in operation process, makes rope lengthThe angle θ is the angle of cross arm of tower and rope L2；Rope L2 hanging point is located at the cross-arm of suspension insulator normal position, and rope L1 hanging point is equal to L2 apart from rope L2 hanging point distance and restricts It is long；Before equipotential live line work starts, equipotential live line work personnel are located at the hanging point of rope L1, and are sitting in hanging basket, then release rope Long L1, taking the angle θ is 10 °, makes rope lengthIt determines at first operation track point, in the operation track point, The position of operating personnel in space in hanging basket needs to meet formula (1)
The S1+S3 and S2+S3 for calculating spatial position are met the requirements if distance is all larger than 6.9m at this time, if apart from full Foot requires, and calculates the electric field strength E that equipotential live line work personnel are in the point.By the way that φ can be found out to formula (2), by what is found out φ substitutes into formula (3), can find out the filed intensity on body surface E for the equipotential live line work personnel being positioned in the space.
In formulaFor laplacian；
φ is current potential scalar；
ρ is free charge density；
ε is the relative dielectric constant of air；
X, y, z are the rectangular co-ordinate where the medium positioning operation personnel in space；
E is equipotential live line work personnel body surface electric field strength.
The operation track point of selection, need to meet formula (1) and electric field strength E simultaneously need to be less than the critical bloom field strength of conducting wire Ecr.Make to wear critical that the equipotential live line work personnel of shading ring are less than conducting wire in the filed intensity on body surface of the point in insulation hanging basket It has stage fright strong, to guarantee that the safety of equipotential live line work personnel, the critical bloom field strength of conducting wire are calculated by formula (4)
δ is the relative density of air in formula (4)；
r0For the radius of bloom conducting wire, cm；
M is the coefficient of regime of conductive line surfaces, and value is 0.8~1.0.
4) remaining 8 working paths planning point, is determined, by the determination method of first operation track point in step 3), According to the angle θ 10 ° of method incremented by successively, so that the angle θ is successively equal to 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 °, make rope lengthTo determine second, third, the 4th, the 5th, the 6th, the 7th, the 8th working path Point.The determination of 9th working path point, the operating personnel in hanging basket reaches the position of conducting wire level in vertical direction at this time, Horizontal position is from conducting wire 0.5m, and the angle of rope length L2 and suspension insulator is α at this time,The then work θ=90 °-the α of industry tracing point, makes rope lengthTo determine the 9th working path point.Tenth working path The determination of point, operating personnel need to reach on conducting wire, when reaching the 9th working path point, because of operating personnel and conductor flat It together, is 0.5m from conducting wire horizontal distance, the equipotential live line work personnel in hanging basket will hold rapidly arc suppression reactor and go to connect at this time Ultra-high Voltage Wire is touched, the angle of L1 and L2 is 90 degree when contact wire, makes rope lengthEach tracing point is pressed After operation rope length determines job position, the value of the S1+S3 and S2+S3 of spatial position are calculated, whether checking computations meet formula (1) With the requirement of electric field strength.If above ten operation track points are all satisfied the requirement of formula (1) and electric field strength by verifying, Above ten operation track points can be connected it is into a line, be extra-high voltage AC circuit anchor support hanging basket method equipotential live line work rule The working path drawn.
Specific example:
By taking Huainan-Nanjing-Shanghai -1000kV UHV transmission line engineering anchor support hanging basket method operation as an example:
According to the process that step 1) describes, operation on Huainan-Nanjing-Shanghai 1000kV Thailand Wu No. 568 shaft towers of I/II line, bar Tower model SJV321, on November 10th, 2018 carry out operation at this, and the environment temperature T measured at that time is 19 °, the phase of air To humidity be H (%) be 55.7, air pressure P (Torr) is 756.45.
According to the process that step 2) describes, the environmental parameter measured according to step 1) tables look-up the opposite dielectric for obtaining air Constant ε=1.000668.
According to the process that step 3) describes, operation shaft tower coordinate system is determined, using the lower cross-arm center of operation shaft tower as coordinate Origin；Operation cross-arm length is 12.4m, and hard wire jumper insulator chain is long and fitting total length is 11m, so the length of operation rope length L2 Degree is 11m, and L2 is remained unchanged in operation process, and the hanging point of L2 is hung at the cross-arm A of two hard wire jumper insulator middle upper parts, The hanging point of L1 is hung on the cross-arm at the hanging point 11m from L2 at B, anchor support hanging basket method operation overall model figure is established, such as Fig. 1 institute Show.Before operation starts, equipotential live line work personnel are and to be sitting in hanging basket at the hanging point of L1, and then staff discharges operation rope Sub- L1, makesL1=1.92m is acquired, so staff should discharge work at this time The length of industry rope L1 is 1.92m, obtains first operation track point, and S1 is the equipotential live line work personnel that are sitting in hanging basket from tower The horizontal distance of body, S2 are vertical range of the equipotential live line work personnel from shaft tower being sitting in hanging basket, and S3 is to be sitting in hanging basket Equipotential live line work personnel fall the distance of conducting wire, and the equipotential live line work personnel spatial position figure in hanging basket is such as schemed shown in (2).At this point, S1=1.772m；S2=1.913m；S3=14.139m.Meet formula (1)
Then obtain wearing the body surface electric field strength that screening clothing is sitting in human body in hanging basket, E using FEM calculationmax=5.8kV/ M at this time and calculates the critical bloom field strength of conducting wire, according to formula For the relative density of air, m is the coefficient of regime of conductive line surfaces, it is contemplated that eight bundle conductor configurations, m value are 0.85.r0For The radius of bloom conducting wire, eight oidiospore wire diameter of extra-high voltage are 33.8mm, and the equivalent redius for being scaled conducting wire is 350mm, Ecr =2690.1kV/m.It is compared discovery Emax<Ecr, illustrate that body surface field strength at this time is less than the critical bloom field strength of conducting wire, no Electric discharge phenomena can occur, operating personnel is safe.
According to the process that step 4) describes, the determination of remaining 8 working paths planning point is carried out.Determine the second operation road When diameter point, operation rope length is discharged, is madeL1=3.82m is acquired, obtains second A working path point, at this point, S1=2.193m；S2=3.819m；S3=12.569m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=6.9kV/m, Emax<Ecr, Illustrate that electric discharge phenomena will not occur for body surface field strength, operating personnel is safe less than the critical bloom field strength of conducting wire at this time. When determining third working path point, operation rope length is discharged, is madeAcquire L1 =5.69m obtains third working path point, at this point, S1=2.897m；S2=5.496m；S3=11m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=11.8kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 4th working path point, operation rope length is discharged, is madeAcquire L1= 7.52m obtains the 4th working path point, at this point, S1=3.917m；S2=7.067m；S3=9.302m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=40.1kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 5th working path point, operation rope length is discharged, is madeAcquire L1= 9.30m obtains the 5th working path point, at this point, S1=5.210m；S2=8.428m；S3=7.522m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=50.6kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 6th working path point, operation rope length is discharged, is madeIt acquires L1=11m obtains the 6th working path point, at this point, S1=6.723m；S2=9.526m；S3=5.695m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, calculated value E are carried out using FInite Elementmax=198.2kV/ M, Emax<Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena, operation people will not occur for body surface field strength at this time Member is safe.When determining the 7th working path point, operation rope length is discharged, is made L1=12.62m is acquired, the 7th working path point is obtained, at this point, S1=8.071m；S2=10.243m；S3= 4.081m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=250.5kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 8th working path point, operation rope length is discharged, is madeIt asks L1=14.14m is obtained, the 8th working path point is obtained, at this point, S1=10.094m；S2=10.833m；S3=1.917m is full Sufficient formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=798kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is peace Complete.When determining the 9th working path point, the operating personnel in hanging basket reaches the position of conducting wire level in vertical direction at this time It sets, from conducting wire 0.5m, the operation of hanging basket method is such as schemed shown in (3), calculating is restricted at this time from conducting wire 0.5m job position figure for horizontal position The angle of long L2 and suspension insulator is α, according to formulaθ=90 °-α=87.4 are obtained, Make rope lengthθ=87.4 °, L2=11m acquire L1=15.2m, at this point, S1=11.491m；S2= 10.989m；S3=0.5m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time is carried out using FInite Element, the operation of hanging basket method is from hard wire jumper 0.5m body surface maximum field intensity is Emax=1260kV/m, Emax<Ecr, Emax<Ecr, illustrate body surface field strength at this time Less than the critical bloom field strength of conducting wire, electric discharge phenomena will not occur, operating personnel is safe.Tenth working path point is really Fixed, operating personnel need to reach on conducting wire, when reaching the 9th working path point, because operating personnel is concordant with conducting wire, from Conducting wire horizontal distance be 0.5m, at this time the equipotential live line work personnel in hanging basket to hold rapidly arc suppression reactor go to contact it is extra-high Conducting wire is pressed, the angle of L1 and L2 is 90 degree when contact wire, makes rope lengthAcquire L1=15.2m, hanging basket method The equipotential live line work location drawing is such as schemed shown in (4).At this point, S1=11.98m, S2=11m；S3=0m；Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time is carried out using FInite Element, people when hanging basket method operation equipotential Body filed intensity on body surface FEM calculation cloud atlas is as shown in figure 5, Emax=1583kV/m, Emax<Ecr, illustrate that body surface field strength is small at this time In the critical bloom field strength of conducting wire, electric discharge phenomena will not occur, operating personnel is safe.
It is with Huainan-Nanjing-Shanghai -1000kV UHV transmission line engineering straight corner anchor support hanging basket method operation Example:
According to the process that step 1) describes, operation on Huainan-Nanjing-Shanghai 1000kV Thailand Wu No. 537 shaft towers of I/II line, bar Tower model SZJV322, on November 10th, 2018 carry out operation at this, and the environment temperature T measured at that time is 19 °, air Relative humidity be H (%) be 55.7, air pressure P (Torr) is 756.45.
According to the process that step 2) describes, the environmental parameter measured according to step 1) tables look-up the opposite dielectric for obtaining air Constant ε=1.000668.
According to the process that step 2) describes, the environmental parameter measured according to step 1) tables look-up the opposite dielectric for obtaining air Constant ε=1.000668.
According to the process that step 3) describes, operation shaft tower coordinate system is determined, using the lower cross-arm center of operation shaft tower as coordinate Origin；Operation cross-arm length is 18.7m, and V string edge substring is long and fitting total length is 12.4m, and two constitute V insulator string Angle is 90 degree, so the length of operation rope length L2 is 12.4 × cos45 °=8.8m, L2 is remained unchanged in operation process, L2 Hanging point hang over the place cross-arm A among V insulator string, the hanging point of L1 is hung on the cross-arm at the hanging point 8.8m from L2 at B, foundation Straight corner anchor support hanging basket method operation overall model figure, as shown in Figure 6.Before operation starts, equipotential live line work personnel are L1's It at hanging point, and is sitting in hanging basket, then staff discharges operation rope L1, makesθ=10 °, L2= 8.8m acquires L1=1.53m, so the length that staff should discharge operation rope L1 at this time is 1.53m, obtains first Operation track point, S1 are horizontal distance of the equipotential live line work personnel from tower body being sitting in hanging basket, S2 be sitting in hanging basket etc. Vertical range of the current potential operating personnel from shaft tower, S3 are that the equipotential live line work personnel being sitting in hanging basket fall the distance of conducting wire, straight line Equipotential live line work personnel spatial position figure in corner anchor support hanging basket, as shown in Figure 7.At this point, S1=2.198m；S2= 1.524m；S3=11.268m.Meet formula (1)
Then obtain wearing the body surface electric field strength that screening clothing is sitting in human body in hanging basket, E using FEM calculationmax= 10.9kV/m at this time and calculates the critical bloom field strength of conducting wire, according to formulaFor the relative density of air, m is the state system of conductive line surfaces Number, it is contemplated that eight bundle conductor configurations, m value are 0.85. r0For the radius of bloom conducting wire, extra-high voltage eight is divided outside sub-conductor Diameter is 33.8mm, and the equivalent redius for being scaled conducting wire is 350mm, Ecr=2690.1kV/m.It is compared discovery Emax<Ecr, say The bright field strength of body surface at this time is less than the critical bloom field strength of conducting wire, electric discharge phenomena will not occur, operating personnel is safe.
According to the process that step 4) describes, the determination of remaining 8 working paths planning point is carried out.Determine the second operation road When diameter point, operation rope length is discharged, is madeL1=3.06m is acquired, obtains second A working path point, at this point, S1=2.538m；S2=3.013m；S3=10.049m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=12.3kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining third working path point, operation rope length is discharged, is madeIt acquires L1=4.56m obtains third working path point, at this point, S1=2.12m；S2=5.496m；S3=11m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=11.6kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 4th working path point, operation rope length is discharged, is madeIt acquires L1=6.02m obtains the 4th working path point, at this point, S1=3.963m；S2=5.657m；S3=7.406m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=48.8kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 5th working path point, operation rope length is discharged, is madeIt acquires L1=7.44m obtains the 5th working path point, at this point, S1=5.007m；S2=6.743m；S3=5.992m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=180.6kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 6th working path point, operation rope length is discharged, is madeIt asks L1=8.8m is obtained, the 6th working path point is obtained, at this point, S1=6.227m；S2=7.621m；S3=4.536m.Meet public Formula (1):
And the calculating of operating personnel's body surface electric field strength at this time, calculated value E are carried out using FInite Elementmax=230.2kV/ M, Emax<Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena, operation people will not occur for body surface field strength at this time Member is safe.When determining the 7th working path point, operation rope length is discharged, is made L1=10.09m is acquired, the 7th working path point is obtained, at this point, S1=7.572m；S2=8.267m；S3= 3.108m.Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=388.6kV/m, Emax< Ecr, illustrate that less than the critical bloom field strength of conducting wire electric discharge phenomena will not occur for body surface field strength at this time, operating personnel is safety 's.When determining the 8th working path point, operation rope length is discharged, is madeIt asks L1=11.31m is obtained, the 8th working path point is obtained, at this point, S1=9.056m；S2=8.666m；S3=1.531m meets Formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, E are carried out using FInite Elementmax=1001.1kV/m, Emax < Ecr, illustrate that electric discharge phenomena will not occur for body surface field strength, operating personnel is less than the critical bloom field strength of conducting wire at this time Safety.When determining the 9th working path point, the operating personnel in hanging basket reaches conducting wire level in vertical direction at this time Position, horizontal position is from conducting wire 0.5m, and the hanging basket method operation of straight corner anchor support is from conducting wire 0.5m job position figure, such as Fig. 8 institute Show, calculating the angle of rope length L2 and suspension insulator at this time is α, according to formulaIt obtains θ=90 °-α=86.74, make rope lengthθ=87.4 °, L2=8.8m acquire L1=12.09m, at this point, S1=10.085m；S2=8.786m；S3=0.5m.Meet formula (1):
And the calculating of operating personnel's body surface electric field strength at this time is carried out using FInite Element, the operation of hanging basket method is from hard wire jumper 0.5m body surface maximum field strength is Emax=1262kV/m, Emax<Ecr, illustrate that body surface field strength is less than facing for conducting wire at this time Boundary's bloom field strength, will not occur electric discharge phenomena, and operating personnel is safe.The determination of tenth working path point, operating personnel It need to reach on conducting wire, when reaching the 9th working path point, because operating personnel is concordant with conducting wire, from conducting wire horizontal distance For 0.5m, the equipotential live line work personnel in hanging basket will hold rapidly arc suppression reactor and go contact Ultra-high Voltage Wire, contact at this time The angle of L1 and L2 is 90 degree when conducting wire, makes rope lengthAcquire L1=15.2m, straight corner anchor support hanging basket The method equipotential live line work location drawing, as shown in Figure 9.At this point, S1=11.66m, S2=11m；S3=0m；Meet formula (1)
And the calculating of operating personnel's body surface electric field strength at this time, straight corner anchor support hanging basket method are carried out using FInite Element Body surface field strength FEM calculation cloud atlas when operation equipotential, E as shown in Figure 10max=1583kV/m, Emax<Ecr, illustrate this When body surface field strength be less than conducting wire critical bloom field strength, electric discharge phenomena will not occur, operating personnel is safe.

Claims (2)

1.一种考虑环境因素的特高压交流线路耐张塔吊篮法等电位作业路径规划方法，其特征在于：通过对特高压交流输电线路耐张塔带电作业杆塔所在地理位置的气象参数的测量，得到作业时的空气湿度H、环境温度T、和当时的气压P，在此基础上得出空气的相对介电常数；通过作业绳长的确定和组合间隙的判断，来初步确定身在吊篮中的等电位作业人员的位置，然后对每一个作业轨迹点的人体体表场强进行电场计算；并将每一个作业点的人体体表场强与导线的临界起晕场强进行比较，最终确定出十个作业轨迹点，将满足要求的十个作业轨迹低点连成一条弧线，即得到特高压交流线路吊篮法等电位作业规划路径。1. a method for planning an equipotential operation path of the UHV AC line tension tower hanging basket method considering environmental factors, it is characterized in that: by the measurement of the meteorological parameters of the geographical location where the UHV AC transmission line tension tower live work tower is located, Obtain the air humidity H, the ambient temperature T, and the air pressure P at the time of operation, and on this basis, obtain the relative permittivity of the air; through the determination of the working rope length and the judgment of the combined gap, it is preliminarily determined that the body is in the gondola. The position of the equipotential worker in Ten operating trajectory points are determined, and the ten operating trajectory low points that meet the requirements are connected into an arc, that is, the planned path of the UHV AC line gondola method equipotential operation is obtained. 2.一种考虑环境因素的特高压交流线路耐张塔吊篮法等电位作业路径规划方法，其特征在于包括以下步骤：2. A method for planning an equipotential working path of the UHV AC line tension tower hanging basket method considering environmental factors, it is characterized in that comprising the following steps: 步骤1：测量作业杆塔所在地理位置的空气湿度H、环境温度T、和当时的气压P；Step 1: Measure the air humidity H, the ambient temperature T, and the air pressure P at the geographic location where the operating tower is located; 步骤2：空气的相对介电常数ε与空气湿度、温度、气压的关系，空气的相对介电常数ε随着空气湿度的增加而变大，随着温度的增加而减小，随着气压的增加而增加；Step 2: The relationship between the relative permittivity ε of air and air humidity, temperature and air pressure. The relative permittivity ε of air increases with the increase of air humidity, decreases with the increase of temperature, and increases with the increase of air pressure. to increase; to increase; 步骤3：确定作业杆塔坐标系，以作业横担所在杆塔中心点为坐标原点，确定绳长L1和L2，绳长L2长度等于悬垂绝缘子串的长度与金具长度之和，作业过程中确保L2绳长不变，L1在作业过程中是变化的，使绳长θ角为杆塔横担与绳子L2的夹角；绳子L2挂点位于悬垂绝缘子串垂直正上方的横担处，绳子L1挂点距离绳子L2挂点距离等于L2绳长；等电位作业开始前，等电位作业人员位于绳子L1的挂点处，并坐在吊篮中，然后释放绳长L1，取θ角为10°，使绳长确定第一个作业轨迹点处，在该作业轨迹点，身在吊篮中的作业人员在空间中的位置需要满足公式(1)Step 3: Determine the coordinate system of the working pole and tower, take the center point of the pole and tower where the working crossarm is located as the coordinate origin, determine the rope lengths L1 and L2, and the length of the rope length L2 is equal to the sum of the length of the hanging insulator string and the length of the hardware, and ensure that the L2 rope is in the process of operation. The length does not change, L1 changes during the operation, making the rope longer The angle θ is the angle between the cross arm of the tower and the rope L2; the hanging point of the rope L2 is located at the cross arm directly above the vertical insulator string, and the distance between the hanging point of the rope L1 and the hanging point of the rope L2 is equal to the length of the rope L2; The equipotential operator is located at the hanging point of the rope L1 and sits in the hanging basket, and then releases the rope length L1, taking the angle θ as 10°, so that the rope length Determine the first operation trajectory point, at this operation trajectory point, the position of the operator in the gondola in the space needs to satisfy the formula (1) 计算空间位置的S1+S3和S2+S3，如果此时距离均大于6.9m，满足要求，如果距离满足要求，计算等电位作业人员处于该点的电场强度E；通过对公式(2)求出φ，将求出的φ代入公式(3)，求出位于空间中的等电位作业人员的体表场强E；Calculate the S1+S3 and S2+S3 of the spatial position. If the distance is greater than 6.9m at this time, the requirements are met. If the distance meets the requirements, calculate the electric field intensity E of the equipotential operator at this point; φ, substitute the obtained φ into formula (3) to obtain the body surface field strength E of the equipotential worker located in the space; 式中：为拉普拉斯算符；where: is the Laplace operator; φ为电位标量；φ is the potential scalar; ρ为自由电荷密度；ρ is the free charge density; ε为空气的相对介电常数；ε is the relative permittivity of air; x,y,z为空间中等定位作业人员所在的直角坐标；x, y, z are the Cartesian coordinates where the operator is located in the middle of the space; E为等电位作业人员体表电场强度；E is the electric field intensity on the body surface of the equipotential operator; 选取的作业轨迹点，需同时满足公式(1)和电场强度E需小于导线的临界起晕场强Ecr；使身在绝缘吊篮中身穿屏蔽环的等电位作业人员在该点的体表场强小于导线的临界起晕场强，来保证等电位作业人员的安全，导线的临界起晕场强按公式(4)来进行计算The selected operation trajectory point should satisfy the formula (1) and the electric field intensity E should be less than the critical halo inception field intensity E cr of the wire; The surface field strength is less than the critical halo field strength of the wire to ensure the safety of equipotential operators. The critical halo field strength of the wire is calculated according to formula (4). 公式(4)中δ为空气的相对密度；In formula (4), δ is the relative density of air; r0为起晕导线的半径，cm；r 0 is the radius of the halo wire, cm; m为导线表面的状态系数，取值在0.8～1.0；m is the state coefficient of the wire surface, which ranges from 0.8 to 1.0; 步骤4、确定剩下的8个作业路径规划点，按步骤3中第一个作业轨迹点的确定方法，按照θ角依次递增10°的方法，使θ角依次等于20°，30°，40°，50°，60°，70°，80°，使绳长来确定第二个、第三个、第四个、第五个、第六个、第七个、第八个作业路径点；第九个作业路径点的确定，此时吊篮中的作业人员在垂直方向上达到导线水平的位置，水平位置离导线0.5m，此时绳长L2与悬垂绝缘子串的夹角为α，则该作业轨迹点的θ＝90°-α，使绳长来确定第九个作业路径点；每一个轨迹点按作业绳长确定好作业位置后，计算空间位置的S1+S3和S2+S3的值，验算是否满足公式(1)和电场强度的要求；如果以上十个作业轨迹点经过验证均满足公式(1)和电场强度的要求，将以上十个作业轨迹点连成一条线，即是特高压交流线路吊篮法等电位作业规划的作业路径。Step 4. Determine the remaining 8 working path planning points. According to the method for determining the first working track point in step 3, follow the method of increasing the θ angle by 10°, so that the θ angle is equal to 20°, 30°, 40°. °, 50°, 60°, 70°, 80°, make the rope long To determine the second, third, fourth, fifth, sixth, seventh, and eighth operating path points; to determine the ninth operating path point, the operator in the gondola In the vertical direction, the horizontal position of the wire is reached, and the horizontal position is 0.5m away from the wire. At this time, the angle between the rope length L2 and the hanging insulator string is α, Then θ=90°-α of the working track point, so that the rope length to determine the ninth operating path point; after each trajectory point determines the operating position according to the length of the operating rope, calculate the values of S1+S3 and S2+S3 of the spatial position, and check whether the requirements of formula (1) and electric field strength are met; If the above ten operating trajectory points are verified to meet the requirements of formula (1) and electric field strength, connecting the above ten operating trajectory points into a line is the operating path planned for the UHV AC line gondola method equipotential operation.
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