CN109241645A - A kind of method and system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower - Google Patents
A kind of method and system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower Download PDFInfo
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Abstract
The invention discloses a kind of method and system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower, by establishing the audible noise and radio interference calculating model that 750kV transmission line with four-circuit on single tower does not consider that height above sea level influences, calculate audible noise and radio interference level, filter out a variety of alternative phase sequence arrangements, a kind of optimal phase sequence arrangement is determined in conjunction with electric field strength, then it corrects to obtain different altitude height by height above sea level and meets the optimization conducting wire pattern that electromagnetic environment control requires, and economy verifying is carried out to the corresponding transmission line of electricity of optimization conducting wire pattern and determines optimal conducting wire pattern, avoid the simple deficiency for considering electromagnetic environment and determining conducting wire pattern, to guarantee the environmental-friendly of engineering, it improves engineering economy and provides important technical support.The present invention is applicable not only to the needs that northwest China transmission line of electricity determines, the line conductor that also can be used in the overlength distances such as global energy internet determines that applicability is good, and application and popularization value is high.
Description
Technical field
The present invention relates to transmission line of electricity technical fields, and feed back electricity with tower four more particularly, to a kind of determining 750kV
The method and system of the conducting wire pattern of route.
Background technique
Northwest China area 750kV power network development is rapid, has gradually formed networking, and a plurality of route of planning construction passes through
The nervous area in surrounding city transmission of electricity corridor further increases defeated to alleviate Counties of North-west Five area 750kV transmission of electricity corridor anxiety situation
The economy of power transformation engineering construction and operation, need study and apply 750kV multiple-loop line road technology of transmission of electricity.
750kV multiple-loop line road technology of transmission of electricity has reduction electrical energy transportation cost, effectively improves transmission capacity, reduces transmission of electricity
The features such as corridor is to appropriation of land is expensive soil, house congested area saving line corridor and engineering construction investment, raising
One of effective ways of transmission capacity.750kV has the particularity of its own with four loop transmission line of tower, due to phase conductor number
It greatly increases, the coupling between route is more complicated, and the formal character of phase sequence arrangement is more various, and shaft tower more Gao Geng great considers sea
The electromagnetic environment for pulling out influence is more complicated, must suddenly determine the optimal conducting wire pattern determination side for meeting electromagnetic environment Con trolling index
Method provides solid foundation for engineer application.
Summary of the invention
The present invention proposes a kind of method and system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower, to solve
The problem of how determining the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided a kind of determining 750kV feeds back electricity with tower four
The method of the conducting wire pattern of route, which is characterized in that the described method includes:
Step 1, it establishes 750kV transmission line with four-circuit on single tower and does not consider audible noise and radio interference meter that height above sea level influences
Calculate model；
Step 2, it according to the conductor cross-section, division number and minimum altitude of the transmission line of electricity of setting, is calculated using the model
The audible noise and radio interference level of the corresponding transmission line of electricity of all phase sequence arrangements；Wherein, the transmission of electricity of initial setting up
Conductor cross-section, division number and the minimum altitude of route and the conducting wire pattern of 750kV same tower double back transmission line are identical；
Step 3, to the audible noise and radio interference of the corresponding transmission line of electricity of phase sequence arrangement had at future position
It is horizontal to carry out ascending order arrangement respectively, and the phase sequence arrangement of preset quantity alternately phase sequence arrangement is chosen respectively；
Step 4, the corresponding power-frequency electric field strength of every kind of phase sequence arrangement in alternative phase sequence arrangement is calculated separately；
Step 5, it is determined according to the screening sequence of audible noise, radio interference level and power-frequency electric field strength a kind of optimal
Phase sequence arrangement；
Step 6, the corresponding ground maximum field intensity of different height under optimal phase sequence arrangement is calculated separately, and is chosen
The corresponding height of ground maximum field intensity of just less than default electric field threshold limit value is as optimal height；
Step 7, the corresponding audible noise of conducting wire pattern and radio interference level different under the optimal height are calculated；
Wherein, according to the sub-conductor section of initial setting up and division number adjustment conductor cross-section or division number to obtain different lead-types
Formula；
Step 8, audible noise height above sea level correction formula and radio interference height above sea level correction formula are utilized respectively according to power transmission line
The height above sea level on road is modified the different corresponding audible noises of conducting wire pattern and radio interference level；
Step 9, it is controlled and is required according to electromagnetic environment, determined that the different altitude height for meeting electromagnetic environment requirements is corresponding and lead
Line style formula；
Step 10, judgement has the transmission of electricity of the corresponding conducting wire pattern of different altitude height for meeting electromagnetic environment requirements
Whether the economic performance of route meets economic performance requirement, if satisfied, then determining the difference sea for meeting electromagnetic environment requirements
The corresponding conducting wire pattern of degree of lifting is the conducting wire pattern of 750kV transmission line with four-circuit on single tower；Conversely, increasing the division of transmission line of electricity
Number, and return step 2.
Preferably, wherein utilizing the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i sound
Power stage；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire point
Split number；D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
Preferably, wherein utilizing the radio interference level of excitation function computing electric power line:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit be dB (μ A/), average maximum potential gradient gmaxUnit be kV/
Cm), the unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherPreferably
Radio interference level under weather.
Preferably, wherein the future position is at the outer 20m of side phase conductor floor projection；It is divided between the different height
1m；Default electric field threshold limit value is 10kV/m.
Preferably, wherein the method also includes:
Small transmission line of electricity is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, is led with the minimum that highest height above sea level determines
Line section and division number are as final conducting wire pattern；Power transmission line greatly is changed for 750kV quadri-circuit lines on the same tower road altitude ranges
Road, using the corresponding minimum conductor cross-section of different altitude height and division number as final conducting wire pattern.
Preferably, wherein the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity,
Unit is m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount；Unit is dB；K is constant；H is the height above sea level of transmission line of electricity
Highly, unit m, H >=0.
According to another aspect of the present invention, a kind of conducting wire pattern of determining 750kV transmission line with four-circuit on single tower is provided
System, which is characterized in that the system comprises:
Audible noise and radio interference level computation model establish unit, feed back electric wire with tower four for establishing 750kV
Road does not consider that the audible noise that height above sea level influences and radio interference calculate model；
First audible noise and radio interference level computing unit, the conducting wire for the transmission line of electricity according to setting are cut
Face, division number and minimum altitude calculate the audible noise of the corresponding transmission line of electricity of all phase sequence arrangements using the model
And radio interference level；Wherein, the conductor cross-section of the transmission line of electricity of initial setting up, division number and minimum altitude and 750kV are same
The conducting wire pattern of tower double back transmission line is identical；
Alternative phase sequence arrangement determination unit, for the corresponding transmission line of electricity of phase sequence arrangement had at future position
Audible noise and radio interference level carry out ascending order arrangement respectively, and respectively choose preset quantity phase sequence arrangement make
For alternative phase sequence arrangement；
Power-frequency electric field strength computing unit, for calculating separately every kind of phase sequence arrangement pair in alternative phase sequence arrangement
The power-frequency electric field strength answered；
Optimal phase sequence arrangement determination unit, for according to audible noise, radio interference level and power frequency electric field strength
The screening sequence of degree determines a kind of optimal phase sequence arrangement；
Optimal height determination unit, it is maximum for calculating separately the corresponding ground of different height under optimal phase sequence arrangement
Electric field strength, and the corresponding height of ground maximum field intensity of just less than default electric field threshold limit value is chosen as optimal height
Degree；
Second audible noise and radio interference level computing unit, for calculating conducting wire different under the optimal height
The corresponding audible noise of pattern and radio interference level；Wherein, it is adjusted according to the sub-conductor section of initial setting up and division number
Conductor cross-section or division number are to obtain different conducting wire patterns；
Audible noise and radio interference level amending unit, for being utilized respectively audible noise height above sea level correction formula and nothing
Line electrical interference height above sea level correction formula is according to the height above sea level of transmission line of electricity to the different corresponding audible noises of conducting wire pattern and nothing
Line electrical interference level is modified；
Meet the wire form determination unit of electromagnetic environment requirements, required for being controlled according to electromagnetic environment, determines and meet
The corresponding conducting wire pattern of the different altitude height of electromagnetic environment requirements；
Final conducting wire pattern determination unit, for judging that there is the different altitude height pair for meeting electromagnetic environment requirements
Whether the economic performance of the transmission line of electricity for the conducting wire pattern answered meets economic performance requirement, if satisfied, then determining the satisfaction electricity
The corresponding conducting wire pattern of different altitude height that magnetic environment requires is the conducting wire pattern of 750kV transmission line with four-circuit on single tower；Conversely,
Increase the division number of transmission line of electricity, and and returns to first audible noise and radio interference level computing unit.
Preferably, wherein utilizing the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i sound
Power stage；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire point
Split number；D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
Preferably, wherein utilizing the radio interference level of excitation function computing electric power line:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit be dB (μ A/), average maximum potential gradient gmaxUnit be kV/
Cm), the unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherPreferably
Radio interference level under weather.
Preferably, wherein the future position is at the outer 20m of side phase conductor floor projection；It is divided between the different height
1m；Default electric field threshold limit value is 10kV/m.
Preferably, wherein the final conducting wire pattern determination unit, further includes: for 750kV quadri-circuit lines on the same tower road height above sea level
The small transmission line of electricity of range, the minimum conductor cross-section and division number determined using highest height above sea level is as final conducting wire pattern；
Transmission line of electricity greatly is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, using the corresponding minimum conducting wire of different altitude height
Section and division number are as final conducting wire pattern.
Preferably, wherein the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity,
Unit is m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount；Unit is dB；K is constant；H is the height above sea level of transmission line of electricity
Highly, unit m, H >=0.
The present invention provides a kind of method and system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower, pass through,
Audible noise and radio interference level are calculated, a variety of alternative phase sequence arrangements are filtered out, is determined in conjunction with electric field strength a kind of
Then optimal phase sequence arrangement is corrected to obtain the corresponding optimization conducting wire pattern of different altitude height by height above sea level, and to optimization
The corresponding transmission line of electricity of conducting wire pattern carries out economy verifying and determines optimal conducting wire pattern, avoids simple consideration electromagnetic environment
The deficiency of conducting wire pattern is determined, to guarantee that environmental-friendly, the raising engineering economy of engineering provide important technical support sheet
Invention provides the method and system for determining the conducting wire pattern of 750kV transmission line with four-circuit on single tower, gives Different Altitude Regions and leads
The determination method of line is applicable not only to the needs that northwest China transmission line of electricity determines, can be used for global energy internet etc.
The line conductor of overlength distance determines that applicability is good, and application and popularization value is high.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is the method 100 according to the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of embodiment of the present invention
Flow chart；
Fig. 2 is the system 200 according to the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of embodiment of the present invention
Structural schematic diagram.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the method 100 according to the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of embodiment of the present invention
Flow chart.As shown in Figure 1, the conducting wire pattern for the determination 750kV transmission line with four-circuit on single tower that embodiments of the present invention provide
Method, pass through, calculate audible noise and radio interference level, a variety of alternative phase sequence arrangements are filtered out, in conjunction with electric field
Intensity determines a kind of optimal phase sequence arrangement, then corrects to obtain different altitude height by height above sea level and meets electromagnetic environment control
It is required that optimization conducting wire pattern, and economy verifying is carried out to the corresponding transmission line of electricity of optimization conducting wire pattern and determines optimal conducting wire
Pattern avoids the simple deficiency for considering electromagnetic environment and determining conducting wire pattern, for environmental-friendly, the raising engineering warp for guaranteeing engineering
Ji property provides important technical support.The determination 750kV transmission line with four-circuit on single tower that embodiments of the present invention provide is led
The method of line style formula gives the determination method of Different Altitude Regions conducting wire, is applicable not only to northwest China transmission line of electricity and determines
Needs, can be used for the overlength distances such as global energy internet line conductor determine, applicability is good, application and popularization value
It is high.The method 100 of the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of embodiments of the present invention is from step 101
Start, establishes the audible noise and radio interference meter that 750kV transmission line with four-circuit on single tower does not consider height above sea level influence in step 101
Calculate model.Such as, however, it is determined that the conducting wire pattern of the 750kV transmission line with four-circuit on single tower of triangle arrangement, the conducting wire pattern ginseng just set
Examine 750kV same tower double back transmission line, conducting wire pattern are as follows: section 500mm2(diameter 3.0cm), division number 6 divide spacing
For 40cm, minimum constructive height is 15m to conducting wire over the ground.
Preferably, institute is utilized according to the conductor cross-section, division number and minimum altitude of the transmission line of electricity of setting in step 102
State audible noise and radio interference level that model calculates the corresponding transmission line of electricity of all phase sequence arrangements；Wherein, initially
The conducting wire pattern phase of conductor cross-section, division number and the minimum altitude of the transmission line of electricity of setting and 750kV same tower double back transmission line
Together.
Preferably, wherein utilizing the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i sound
Power stage；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire point
Split number；D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
Preferably, wherein utilizing the radio interference level of excitation function computing electric power line:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit be dB (μ A/), average maximum potential gradient gmaxUnit be kV/
Cm), the unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherPreferably
Radio interference level under weather.
By the test of complete series conductor corona cage and long-term observation, suitable China's amblent air temperature of proposition and conductor conditions
Audible noise predictor formula is as follows:
Wherein, SLAA is weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i
Acoustic power level,
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
Wherein, E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is
Conducting wire division number；D is sub-conductor diameter (mm), effective range 24mm~40mm.Calculated result is transmission line of electricity audible noise rain
Its L50Value.
China ultrahigh voltage alternating current transmission lines research early period mainly use CISPR excitation function method to radio interference into
Row prediction after extra-high voltage corona cage is built up, by the test of complete series conductor corona cage and long-term observation, proposes suitable China's ring
The radio interference predictor formula of border weather and conductor conditions.The formula excitation function is as follows:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
Excitation function Γ in formulaHeavy rainUnit be dB (μ A/), average maximum potential gradient gmaxUnit be (kV/
Cm), the unit of diameter of wire d is cm.The formula is suitable for 6 divisions and the radio interference prediction of the above conducting wire.Swash above-mentioned
Number of sending a letter substitutes into the radio interference level under the conditions of the available heavy rain of CISPR excitation function formula.Studies have shown that conducting wire
The relational expression of the appropriate clean and conducting wire with aging to a certain degree of surface state, heavy rain and fair weather radio interference is as follows:
RIfair-weather=RIheavy-rain- 18,
I.e. the radio interference rained heavily of fair weather can the radio interference under the conditions of subtract 18dB and obtain.
Preferably, in step 103 to the audible noise of the corresponding transmission line of electricity of phase sequence arrangement had at future position and
Radio interference level carries out ascending order arrangement respectively, and chooses the phase sequence arrangement alternately phase sequence cloth of preset quantity respectively
Set scheme.
Preferably, the corresponding power frequency of every kind of phase sequence arrangement in alternative phase sequence arrangement is calculated separately in step 104
Electric field strength.In embodiments of the present invention, power-frequency electric field strength is calculated using Analogue charge method.
Preferably, true according to the screening sequence of audible noise, radio interference level and power-frequency electric field strength in step 105
A kind of fixed optimal phase sequence arrangement.
Preferably, the corresponding ground maximum field of different height in the case where step 106 calculates separately optimal phase sequence arrangement
Intensity, and the corresponding height of ground maximum field intensity of just less than default electric field threshold limit value is chosen as optimal height.
Preferably, wherein the future position is at the outer 20m of side phase conductor floor projection；It is divided between the different height
1m；Default electric field threshold limit value is 10kV/m.
Preferably, the conducting wire pattern corresponding audible noise different in the case where step 107 calculates the optimal height and wireless
Electrical interference is horizontal；Wherein, according to the sub-conductor section of initial setting up and division number adjustment conductor cross-section or division number to obtain not
Same conducting wire pattern.
Preferably, it is utilized respectively audible noise height above sea level correction formula and radio interference height above sea level correction formula in step 108,
The different corresponding audible noises of conducting wire pattern and radio interference level are modified according to the height above sea level of transmission line of electricity.
Preferably, wherein the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity,
Unit is m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount, unit dB；K is constant；H is the height above sea level of transmission line of electricity
Highly, unit m, H >=0.
In embodiments of the present invention, k takes 3.20 in audible noise height above sea level correction formula；The amendment of radio interference height above sea level
K takes 3.13 in formula.
Preferably, it is controlled and is required according to electromagnetic environment in step 109, determine that the Different Altitude for meeting electromagnetic environment requirements is high
Spend corresponding conducting wire pattern.
Preferably, there is the corresponding conducting wire of different altitude height for meeting electromagnetic environment requirements in step 1010 judgement
Whether the economic performance of the transmission line of electricity of pattern meets economic performance requirement, if satisfied, then determining that the electromagnetic environment that meets is wanted
The corresponding conducting wire pattern of the different altitude height asked is the conducting wire pattern of 750kV transmission line with four-circuit on single tower；Conversely, increasing transmission of electricity
The division number of route, and return step 102.
Preferably, wherein the method also includes: small power transmission line is changed for 750kV quadri-circuit lines on the same tower road altitude ranges
Road, the minimum conductor cross-section and division number determined using highest height above sea level is as final conducting wire pattern；For 750kV quadri-circuit lines on the same tower
Road altitude ranges change transmission line of electricity greatly, using the corresponding minimum conductor cross-section of different altitude height and division number as final
Conducting wire pattern.
Fig. 2 is the system 200 according to the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of embodiment of the present invention
Structural schematic diagram.As shown in Fig. 2, the conducting wire for the determination 750kV transmission line with four-circuit on single tower that embodiments of the present invention provide
The system 200 of pattern, comprising: audible noise and radio interference level computation model establish unit 201, the first audible noise and
Radio interference level computing unit 202, alternative phase sequence arrangement determination unit 203, power-frequency electric field strength computing unit
204, optimal phase sequence arrangement determination unit 205, optimal height determination unit 206, the second audible noise and radio interference
Level calculation unit 207, audible noise and radio interference level amending unit 208, the conducting wire shape for meeting electromagnetic environment requirements
Formula determination unit 209 and final conducting wire pattern determination unit 2010.
Preferably, the audible noise and radio interference level computation model establish unit 201, for establishing 750kV
Transmission line with four-circuit on single tower does not consider that the audible noise that height above sea level influences and radio interference calculate model.
Preferably, first audible noise and radio interference level computing unit 202, for the transmission of electricity according to setting
Conductor cross-section, division number and the minimum altitude of route calculate the corresponding power transmission line of all phase sequence arrangements using the model
The audible noise and radio interference level on road；Wherein, the conductor cross-section of the transmission line of electricity of initial setting up, division number and minimum height
It spends identical as the conducting wire pattern of 750kV same tower double back transmission line.
Preferably, wherein utilizing the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i sound
Power stage；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire point
Split number；D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
Preferably, wherein utilizing the radio interference level of excitation function computing electric power line:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit be dB (μ A/), average maximum potential gradient gmaxUnit be kV/
Cm), the unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherPreferably
Radio interference level under weather.
Preferably, the alternative phase sequence arrangement determination unit 203, for phase sequence arrangement had at future position
The audible noise and radio interference level of corresponding transmission line of electricity carry out ascending order arrangement respectively, and choose preset quantity respectively
Phase sequence arrangement alternately phase sequence arrangement.
Preferably, the power-frequency electric field strength computing unit 204, for calculating separately in alternative phase sequence arrangement every kind
The corresponding power-frequency electric field strength of phase sequence arrangement.
Preferably, the optimal phase sequence arrangement determination unit 205, for according to audible noise, radio interference water
The screening sequence of gentle power-frequency electric field strength determines a kind of optimal phase sequence arrangement.
Preferably, the optimal height determination unit 206, for calculating separately different height under optimal phase sequence arrangement
Corresponding ground maximum field intensity, and the ground maximum field intensity for choosing just less than default electric field threshold limit value is corresponding
Height is used as optimal height.
Preferably, wherein the future position is at the outer 20m of side phase conductor floor projection；It is divided between the different height
1m；Default electric field threshold limit value is 10kV/m.
Preferably, second audible noise and radio interference level computing unit 207, for calculating the optimal height
The different corresponding audible noise of conducting wire pattern and radio interference level under degree；Wherein, it is cut according to the sub-conductor of initial setting up
Face and division number adjustment conductor cross-section or division number are to obtain different conducting wire patterns.
Preferably, the audible noise and radio interference level amending unit 208, for being utilized respectively audible noise sea
It is corresponding to different conducting wire patterns according to the height above sea level of transmission line of electricity to pull out correction formula and radio interference height above sea level correction formula
Audible noise and radio interference level be modified.
Preferably, wherein the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity,
Unit is m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount；Unit is dB；K is constant；H is the height above sea level of transmission line of electricity
Highly, unit m, H >=0.
Preferably, the conducting wire pattern determination unit 209 for meeting electromagnetic environment requirements, for being controlled according to electromagnetic environment
It is required that determining the corresponding conducting wire pattern of different altitude height for meeting electromagnetic environment requirements.
Preferably, the final conducting wire pattern determination unit 2010 meets electromagnetic environment requirements with described for judging
The economic performance of transmission line of electricity of the corresponding conducting wire pattern of different altitude height whether meet economic performance requirement, if satisfied,
Then determine that the corresponding conducting wire pattern of the different altitude height for meeting electromagnetic environment requirements is 750kV transmission line with four-circuit on single tower
Conducting wire pattern；Conversely, increasing the division number of transmission line of electricity, and return to first audible noise and radio interference level meter
Calculate unit 202.
Preferably, wherein the final conducting wire pattern determination unit, further includes: for 750kV quadri-circuit lines on the same tower road height above sea level
The small transmission line of electricity of range, the minimum conductor cross-section and division number determined using highest height above sea level is as final conducting wire pattern；
Transmission line of electricity greatly is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, using the corresponding minimum conducting wire of different altitude height
Section and division number are as final conducting wire pattern.
The system 200 and the present invention of the conducting wire pattern of the determination 750kV transmission line with four-circuit on single tower of the embodiment of the present invention
Another embodiment determination 750kV transmission line with four-circuit on single tower conducting wire pattern method 100 it is corresponding, it is no longer superfluous herein
It states.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (12)
1. a kind of method of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower, which is characterized in that the described method includes:
Step 1, the audible noise and radio interference calculating mould that 750kV transmission line with four-circuit on single tower does not consider that height above sea level influences are established
Type；
Step 2, it according to the conductor cross-section, division number and minimum altitude of the transmission line of electricity of setting, is calculated using the model all
The audible noise and radio interference level of the corresponding transmission line of electricity of phase sequence arrangement；Wherein, the transmission line of electricity of initial setting up
Conductor cross-section, division number and minimum altitude it is identical as the conducting wire pattern of 750kV same tower double back transmission line；
Step 3, to the audible noise and radio interference level of the corresponding transmission line of electricity of phase sequence arrangement had at future position
Ascending order arrangement is carried out respectively, and chooses the phase sequence arrangement alternately phase sequence arrangement of preset quantity respectively；
Step 4, the corresponding power-frequency electric field strength of every kind of phase sequence arrangement in alternative phase sequence arrangement is calculated separately；
Step 5, a kind of optimal phase sequence is determined according to the screening sequence of audible noise, radio interference level and power-frequency electric field strength
Arrangement；
Step 6, the corresponding ground maximum field intensity of different height under optimal phase sequence arrangement is calculated separately, and is chosen just
Less than default electric field threshold limit value the corresponding height of ground maximum field intensity as optimal height；
Step 7, the corresponding audible noise of conducting wire pattern and radio interference level different under the optimal height are calculated；Its
In, according to the sub-conductor section of initial setting up and division number adjustment conductor cross-section or division number to obtain different conducting wire patterns；
Step 8, audible noise height above sea level correction formula and radio interference height above sea level correction formula are utilized respectively according to transmission line of electricity
Height above sea level is modified the different corresponding audible noises of conducting wire pattern and radio interference level；
Step 9, it is controlled and is required according to electromagnetic environment, determine the corresponding lead-type of different altitude height for meeting electromagnetic environment requirements
Formula；
Step 10, judgement has the transmission line of electricity of the corresponding conducting wire pattern of different altitude height for meeting electromagnetic environment requirements
Economic performance whether meet economic performance requirement, if satisfied, then determining that the Different Altitude for meeting electromagnetic environment requirements is high
Spend the conducting wire pattern that corresponding conducting wire pattern is 750kV transmission line with four-circuit on single tower；Conversely, increase the division number of transmission line of electricity,
And return step 2.
2. the method according to claim 1, wherein utilizing the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i acoustical power
Grade；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire division number；
D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
3. the method according to claim 1, wherein utilizing the radio interference of excitation function computing electric power line
It is horizontal:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit beAverage maximum potential gradient gmaxUnit be kV/cm),
The unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherFor fair weather
Under radio interference level.
4. the method according to claim 1, wherein the future position is at the outer 20m of side phase conductor floor projection；
1m is divided between the different height；Default electric field threshold limit value is 10kV/m.
5. the method according to claim 1, wherein the method also includes:
Small transmission line of electricity is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, is cut with the minimum conducting wire that highest height above sea level determines
Face and division number are as final conducting wire pattern；Transmission line of electricity greatly is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, is adopted
Use the corresponding minimum conductor cross-section of different altitude height and division number as final conducting wire pattern.
6. the method according to claim 1, wherein the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity, unit
For m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount；Unit is dB；K is constant；H is the height above sea level of transmission line of electricity
Degree, unit m, H >=0.
7. a kind of system of the conducting wire pattern of determining 750kV transmission line with four-circuit on single tower, which is characterized in that the system comprises:
Audible noise and radio interference level computation model establish unit, for establishing 750kV transmission line with four-circuit on single tower not
Consider the audible noise and radio interference calculating model that height above sea level influences；
First audible noise and radio interference level computing unit, for according to the conductor cross-section of the transmission line of electricity of setting, point
Several and minimum altitude is split, calculates the audible noise of the corresponding transmission line of electricity of all phase sequence arrangements and wireless using the model
Electrical interference is horizontal；Wherein, the conductor cross-section of the transmission line of electricity of initial setting up, division number and minimum altitude and 750kV common-tower double-return
The conducting wire pattern of transmission line of electricity is identical；
Alternative phase sequence arrangement determination unit, for the corresponding transmission line of electricity of phase sequence arrangement had at future position can
It listens noise and radio interference level to carry out ascending order arrangement respectively, and chooses the phase sequence arrangement of preset quantity respectively as standby
Phase selection sequence arrangement；
Power-frequency electric field strength computing unit, it is corresponding for calculating separately every kind of phase sequence arrangement in alternative phase sequence arrangement
Power-frequency electric field strength；
Optimal phase sequence arrangement determination unit, for according to audible noise, radio interference level and power-frequency electric field strength
Screening sequence determines a kind of optimal phase sequence arrangement；
Optimal height determination unit, for calculating separately the corresponding ground maximum field of different height under optimal phase sequence arrangement
Intensity, and the corresponding height of ground maximum field intensity of just less than default electric field threshold limit value is chosen as optimal height；
Second audible noise and radio interference level computing unit, for calculating conducting wire pattern different under the optimal height
Corresponding audible noise and radio interference level；Wherein, conducting wire is adjusted according to the sub-conductor section of initial setting up and division number
Section or division number are to obtain different conducting wire patterns；
Audible noise and radio interference level amending unit, for being utilized respectively audible noise height above sea level correction formula and radio
Interfere height above sea level correction formula according to the height above sea level of transmission line of electricity to the different corresponding audible noises of conducting wire pattern and radio
Interference level is modified；
Meet the wire form determination unit of electromagnetic environment requirements, required for being controlled according to electromagnetic environment, determination meets electromagnetism
The corresponding conducting wire pattern of the different altitude height of environmental requirement；
Final conducting wire pattern determination unit, for judging have the different altitude height for meeting electromagnetic environment requirements corresponding
Whether the economic performance of the transmission line of electricity of conducting wire pattern meets economic performance requirement, described meets electromagnetism ring if satisfied, then determining
The corresponding conducting wire pattern of different altitude height that border requires is the conducting wire pattern of 750kV transmission line with four-circuit on single tower；Conversely, increasing
The division number of transmission line of electricity, and return to first audible noise and radio interference level computing unit.
8. system according to claim 7, which is characterized in that utilize the audible noise such as under type computing electric power line:
LWi=-126.6+97.2lgE+19.1lgn+41.7lgd,
It wherein, is A-weighted sound level, RiIt is future position to the distance of tested phase conductor i, N is the number of phases, LWiFor phase conductor i acoustical power
Grade；E is the electric potential gradient (kV/cm) of conductive line surfaces, using virtual value, 12~20kV/cm of effective range；N is conducting wire division number；
D is sub-conductor diameter (mm), effective range 24mm~40mm；Calculated result is transmission line of electricity audible noise rainy day L50Value.
9. system according to claim 7, which is characterized in that utilize the radio interference of excitation function computing electric power line
It is horizontal:
ΓHeavy rain=55-576.5/gmax+ 42.4lg (d) -0.714lg (n),
RIfair-weather=RIheavy-rain- 18,
Wherein, excitation function ΓHeavy rainUnit beAverage maximum potential gradient gmaxUnit be kV/cm),
The unit of diameter of wire d is cm；RIheavy-rainFor the radio interference level under the conditions of heavy rain；RIfair-weatherFor fair weather
Under radio interference level.
10. system according to claim 7, which is characterized in that the future position is the outer 20m of side phase conductor floor projection
Place；1m is divided between the different height；Default electric field threshold limit value is 10kV/m.
11. system according to claim 7, which is characterized in that the final conducting wire pattern determination unit, further includes: right
In 750kV quadri-circuit lines on the same tower road, altitude ranges change small transmission line of electricity, with the determining minimum conductor cross-section of highest height above sea level and divide
Number is split as final conducting wire pattern；Transmission line of electricity greatly is changed for 750kV quadri-circuit lines on the same tower road altitude ranges, using difference
The corresponding minimum conductor cross-section of height above sea level and division number are as final conducting wire pattern.
12. system according to claim 7, which is characterized in that the audible noise height above sea level correction formula are as follows:
It wherein, is route audible noise height above sea level correction amount, unit dB；K is constant, and H is the height above sea level of transmission line of electricity, unit
For m, H >=0；
The radio interference height above sea level correction formula are as follows:
Wherein, Δ E is route radio interference height above sea level correction amount；Unit is dB；K is constant；H is the height above sea level of transmission line of electricity
Degree, unit m, H >=0.
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