CN109918813A - A kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line - Google Patents
A kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line Download PDFInfo
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Abstract
The present invention relates to a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line, comprising the following steps: step S10 calculates and analyzes for convenience the field distribution situation around transmission line of electricity, the simplification for meeting requirement of engineering precision is done to transmission line of electricity；Step S20 calculates the coefficient of potential matrix of transmission line of electricity by resetting charge simulation and match point position in transmission line of electricity simplified model；Step S30, the charge of unit length conducting wire is calculated according to the coefficient of potential matrix and voltage vector, obtains the electric field that these charges generate, terminal check computational accuracy using superposition theorem, if being unsatisfactory for requiring to repeat step S20.Compared with prior art, the present invention has many advantages, such as that computational accuracy is relatively high.
Description
Technical field
The present invention relates to high-tension transmission technologies, more particularly, to a kind of power frequency electric field based on around ultra-high-tension power transmission line
Acquisition methods.
Background technique
In recent years, as the continuous development of electric system, EHV transmission increase, the electromagnetic interference of electric system, electricity
Magnetic environment problem is increasingly subject to the attention of people.Ultra-high-tension power transmission line may cross over public activity region, even enter city
Area, being redeemed oneself by the electric-field strength that these high voltage electricity transmission conductive wires generate can not neglect as in high-tension transmission technical field and environmental protection
Depending on the problem of.
Transmission line of electricity causes the main source of electromagnetic environment problem to be: high voltage and high current institute on transmission line of electricity conductor
Powerful electric and magnetic fields are generated, line conductor surface corona will generate the harmonic wave of various frequencies, and environment can be produced by sending
Raw certain influence.These can cause certain negative effect to people's lives quality, or even can threaten the body of people
Health and personal safety, therefore there is practical significance to the analysis of ultra-high-tension power transmission line surrounding electric field.
To be by continuous field domain problem is discrete be for finite difference calculus and FInite Element in commonly detection electric field methods
The analysis node of limited quantity, so its detection is on condition that bounded field domain.It is this for the field domain around transmission pressure
Method has certain limitation.When calculating three dimensional field, finite difference calculus and FInite Element need to solve the space of field domain into
Discrete row is multiple nodes.Due to needing the node density in the number and field domain of system of linear equations closely related when solving, when
When required precision is identical, both methods calculation amount is bigger.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to be based on high voltage power transmission
Power frequency electric field acquisition methods around route.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line, comprising the following steps:
Step S10 calculates and analyzes for convenience the field distribution situation around transmission line of electricity, does and meet to transmission line of electricity
The simplification of requirement of engineering precision；
Step S20 is calculated defeated by resetting charge simulation and match point position in transmission line of electricity simplified model
The coefficient of potential matrix of electric line；
Step S30 calculates the charge of unit length conducting wire according to the coefficient of potential matrix and voltage vector, utilizes
Superposition theorem obtains the electric field that these charges generate, terminal check computational accuracy, if being unsatisfactory for requiring to repeat step S20.
Preferably, detailed process is as follows by the step S10:
Power frequency alternating electromagnetic field is regarded as quasi-static field, the three-dimensional electric field in space is reduced to two dimensional field processing, transmission pressure
A piece conducting wire is equivalent to using split conductor, while transmission line of electricity is considered as endless and is parallel to the choosing of surface traverse terrain clearance
With arc sag minimum point or average height and take the earth be zero potential.
Preferably, detailed process is as follows by the step S20:
On the basis of ultra-high-tension power transmission line simplified model, each phase line is much smaller than in view of the radius of ultra-high-tension power transmission line
Distance away the ground, so the position of charge simulation to be arranged in the geometric center of transmission pressure, conductive line surfaces are arranged in match point
Equivalent charge-is arranged in the mirror position that charge simulation q corresponds to the earth in any point and number is identical as charge simulation number
Q, the equivalent influence instead of charge inducing on Earth Surface, to meet the boundary condition of the earth；
By Gauss theorem it is found that charge simulation q and-q the electric field strength E that any point P is generated in field domain1And E2It is respectively as follows:
In formula, ε0For the dielectric constant of vacuum, ρ1With ρ2At a distance from respectively q and-q to any point P in required field domain；
Taking reference point of potential A, then the current potential u of P point is,
In formula, ρ1AWith ρ2AAt a distance from respectively A point to q and-q；
If A is the reference point far from charge simulation, ρ1A≈ρ2A, i.e. formula (2) can abbreviation are as follows:
Obtain Maxwell's coefficient of potential aijAre as follows:
Preferably, ε0It takes
Preferably, detailed process is as follows by the step S30:
To multiple conductor line, following matrix equation can be written are as follows:
In formula, aijFor Maxwell's coefficient of potential, self-potential coefficient isMutually the coefficient of potential isThe dielectric constant of air is ε=ε0εr, εrFor the relative dielectric constant in air, 1.0053, q are takeniFor
The charge simulation on i-th line road, uiFor the voltage-to-ground on i-th line road, r is wire radius, HiGround is arrived for i-th conducting wire
Distance, dijFor the distance between i-th conducting wire and j-th strip conducting wire, DijBetween the mirror image and i-th of match point of jth conducting wire
Distance；
(1) formula is abbreviated as [A] [Q]=[U], [Q]=[A] can be obtained-1[U], it can thus be concluded that every conducting wire is corresponding etc.
Imitate charge are as follows:
Preferably, the electric field strength at any point can be calculated according to principle of stacking in field domain, in the electricity of P (x, y) point
Field intensity component EPx, EPyIt may be expressed as:
In formula, (xi,yi) and (xi,-yi) it is respectively charge simulation q and-q coordinate, n is number of lead wires；
Three-phase AC line is acquired since the voltage of each phase conductor is plural number according to Maxwell's coefficient of potential
Charge is also plural number, so indicating the horizontal and vertical component of P point electric field strength with real and imaginary parts respectively, is respectively as follows:
Formate field intensity can be obtained are as follows:
In formula, EixRWith EixIRespectively each conducting wire generates the real part and imaginary part of field strength level component in the point；EiyRWith EiyI
The real part and imaginary part of respectively each conducting wire field strength vertical component.
Compared with prior art, the method have the benefit that:
The invention proposes a kind of power frequency electric field preparation methods based on around ultra-high-tension power transmission line, solve transmission line of electricity week
When enclosing electric field, the range that can be solved be it is unbounded, continuous field domain, computational accuracy is relatively high, and the present invention is for power transmission line
Field domain adaptability around road is stronger, and calculation amount is smaller.
Detailed description of the invention
Fig. 1 is ultra-high-tension power transmission line electric field equivalent model figure of the invention.
Fig. 2 is charge simulation and image charge schematic diagram of the invention.
Fig. 3 is the flow chart that ultra-high-tension power transmission line surrounding electric field of the invention obtains.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Fig. 1 shows ultra-high-tension power transmission line electric field equivalent model figure of the invention, as shown in Figure 1, Analogue charge method is being counted
When calculating the electric field of transmission line of electricity, it is divided into two kinds of forms of two and three dimensions, two-dimentional calculation method has done letter to the situation of some complexity
Change approximate, regard power frequency alternating electromagnetic field as quasi-static field, overhead line is regarded as unlimited long straight conductor, arc sag minimum point is taken
Distance away the ground be long straight conductor height.Correspondingly, charge simulation takes infinite line charge, is placed in inside conducting wire, calculates
Plane takes the vertical plane perpendicular to power transmission line minimum point.
Fig. 2 is charge simulation and image charge schematic diagram of the invention, as shown in Fig. 2, corresponding to the earth in charge simulation q
Mirror position on equivalent charge-q is set, meet the boundary condition of the earth and equivalent instead of charge inducing on Earth Surface
It influences.P point is any point in field domain to be asked, and B point is a bit in P point infinitesimal area, then route P point is between B point
Potential difference are as follows:
Because B point is a bit in P point infinitesimal area,With d ρ2Can approximation regard as in parallel, andVerticallyIt can
KnowFormula (1) can be with abbreviation are as follows:
Taking reference point of potential A, then the potential difference of P point is,
In formula, ρ1AWith ρ2AAt a distance from respectively A point to q and-q.
If A is the reference point far from charge simulation, ρ1A≈ρ2A, i.e. formula (3) can abbreviation are as follows:
It can be concluded that Maxwell's coefficient of potential are as follows:
Optionally, as one embodiment of the invention, the method also includes:
If taking P point is match point, ρ2=2Hi, ρ1=r, it is equivalent redius that split conductor, which takes radius r,.The dielectric of air is normal
Number is ε=ε0εr, it is available from the coefficient of potential and the mutual coefficient of potential are as follows:
Fig. 3 is the flow chart that ultra-high-tension power transmission line surrounding electric field of the invention obtains, as shown in figure 3, ultra-high-tension power transmission line
Surrounding electric field calculating process includes mainly the position that charge simulation and match point is arranged, and then calculates coefficient of potential matrix, is led to
It crosses solution matrix equation and obtains the equivalent charge of every conducting wire, using on these equivalent charge verification known potential interfaces
Point meets the requirements rear total electric field.
Optionally, as one embodiment of the invention, the method also includes the calculating to equivalent charge and electric field component:
To multiple conductor line, following matrix equation can be written are as follows:
In formula, aijFor Maxwell's coefficient of potential, self-potential coefficient isMutually the coefficient of potential isThe dielectric constant of air is ε=ε0εr, εrFor the relative dielectric constant in air, 1.0053, q are takeniIt is
The charge simulation of i route, uiFor the voltage-to-ground on i-th line road, r is wire radius, HiFor i-th conducting wire to ground away from
From dijFor the distance between i-th conducting wire and j-th strip conducting wire, DijBetween the mirror image and i-th of match point of jth conducting wire away from
From.
(7) formula is abbreviated as [A] [Q]=[U], [Q]=[A] can be obtained-1[U], it can thus be concluded that every conducting wire is corresponding etc.
Imitate charge are as follows:
The electric field strength at any point can be calculated according to principle of stacking in field domain, in the electric field strength minute of P (x, y) point
Measure EPx, EPyIt may be expressed as:
Optionally, as one embodiment of the invention, the method also includes the calculating to synthesis electric field pole value:
Three-phase AC line is acquired since the voltage of each phase conductor is plural number according to Maxwell's coefficient of potential
Charge is also plural number, so indicating the horizontal and vertical component of P point electric field strength with real and imaginary parts respectively, is respectively as follows:
Formate field intensity can be obtained are as follows:
In formula, EixRWith EixIRespectively each conducting wire generates the real part and imaginary part of field strength level component in the point；EiyRWith EiyI
The real part and imaginary part of respectively each conducting wire field strength vertical component.WithRespectively field strength level component phase angle and vertical component phase
Angle.
Formate field intensity is write as to the form of trigonometric function:
The rotating vector of total electric field is an ellipse, and all constantly variation, maximum value are different at any time for size and direction
It is set toTo ask its extreme value to be squared formula (12):
Formula (13) derivation is obtained:
It follows that
The extreme value of available electric field strength at this moment.
Optionally, as one embodiment of the invention, the method also includes verifying computational accuracy:
Place on conducting wire boundary in addition to match point is arranged m checkpoint and calculates their current potential, and verification is public
Formula are as follows:
In formula, i=1 is taken, 2,3, m.
Checkpoint given voltage is made the difference to obtain with voltage is calculated:
In formula, ErFor checkpoint voltage error,For checkpoint voltage known to boundary condition.
If not being able to satisfy the trueness error requirement of calculating, need to reset quantity and the position of charge simulation, directly
Meet the requirement of precision to error.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (6)
1. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line, which comprises the following steps:
Step S10 calculates and analyzes for convenience the field distribution situation around transmission line of electricity, does to transmission line of electricity and meet engineering
The simplification of required precision；
Step S20 calculates power transmission line by resetting charge simulation and match point position in transmission line of electricity simplified model
The coefficient of potential matrix on road；
Step S30 calculates the charge of unit length conducting wire according to the coefficient of potential matrix and voltage vector, utilizes superposition
Theorem obtains the electric field that these charges generate, terminal check computational accuracy, if being unsatisfactory for requiring to repeat step S20.
2. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line according to claim 1, feature exist
In detailed process is as follows by the step S10:
Power frequency alternating electromagnetic field is regarded as quasi-static field, the three-dimensional electric field in space is reduced to two dimensional field processing, transmission pressure uses
Split conductor is equivalent to a conducting wire, while transmission line of electricity is considered as endless and is parallel to surface traverse terrain clearance and selects arc
Minimum point of hanging down or average height simultaneously take the earth for zero potential.
3. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line according to claim 1, feature exist
In detailed process is as follows by the step S20:
On the basis of ultra-high-tension power transmission line simplified model, each phase line is much smaller than over the ground in view of the radius of ultra-high-tension power transmission line
Highly, so the position of charge simulation to be arranged in the geometric center of transmission pressure, any of conductive line surfaces is arranged in match point
A little and number is identical as charge simulation number, and equivalent charge-q is arranged in the mirror position that charge simulation q corresponds to the earth, etc.
Effect replaces the influence of charge inducing on Earth Surface, to meet the boundary condition of the earth；
By Gauss theorem it is found that charge simulation q and-q the electric field strength E that any point P is generated in field domain1And E2It is respectively as follows:
In formula, ε0For the dielectric constant of vacuum, ρ1With ρ2At a distance from respectively q and-q to any point P in required field domain；
Taking reference point of potential A, then the current potential u of P point is,
In formula, ρ1AWith ρ2AAt a distance from respectively A point to q and-q；
If A is the reference point far from charge simulation, ρ1A≈ρ2A, i.e. formula (2) can abbreviation are as follows:
Obtain Maxwell's coefficient of potential aijAre as follows:
4. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line according to claim 3, feature exist
In ε0It takes
5. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line according to claim 1, feature exist
In detailed process is as follows by the step S30:
To multiple conductor line, following matrix equation can be written are as follows:
In formula, aijFor Maxwell's coefficient of potential, self-potential coefficient isMutually the coefficient of potential isThe dielectric constant of air is ε=ε0εr, εrFor the relative dielectric constant in air, 1.0053, q are takeniIt is
The charge simulation of i route, uiFor the voltage-to-ground on i-th line road, r is wire radius, HiFor i-th conducting wire to ground away from
From dijFor the distance between i-th conducting wire and j-th strip conducting wire, DijBetween the mirror image and i-th of match point of jth conducting wire away from
From；
(1) formula is abbreviated as [A] [Q]=[U], [Q]=[A] can be obtained-1[U], it can thus be concluded that the corresponding equivalent electricity of every conducting wire
Lotus are as follows:
6. a kind of power frequency electric field acquisition methods based on around ultra-high-tension power transmission line, feature according to claim 3 or 5
It is, the electric field strength at any point can be calculated according to principle of stacking in field domain, in the electric field strength component of P (x, y) point
EPx, EPyIt may be expressed as:
In formula, (xi,yi) and (xi,-yi) it is respectively charge simulation q and-q coordinate, n is number of lead wires；
For three-phase AC line, since the voltage of each phase conductor is plural number, the charge acquired according to Maxwell's coefficient of potential
It is also plural number, so indicating the horizontal and vertical component of P point electric field strength with real and imaginary parts respectively, is respectively as follows:
Formate field intensity can be obtained are as follows:
In formula, EixRWith EixIRespectively each conducting wire generates the real part and imaginary part of field strength level component in the point；EiyRWith EiyIRespectively
For the real part and imaginary part of each conducting wire field strength vertical component.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337732A (en) * | 2020-03-26 | 2020-06-26 | 清华大学 | Voltage measurement method based on electric field inversion |
| CN112730994A (en) * | 2020-12-22 | 2021-04-30 | 国网天津市电力公司电力科学研究院 | Method and system for obtaining high-voltage alternating-current line electric field based on MATLAB |
| CN112765773A (en) * | 2020-12-25 | 2021-05-07 | 浙江大学 | Method for determining public electric field exposure dose near extra-high voltage direct current transmission line |
| CN113674512A (en) * | 2021-05-31 | 2021-11-19 | 国网陕西省电力公司建设分公司 | Online monitoring and early warning system and method for live cross-over construction site |
| CN114184850A (en) * | 2021-12-07 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | Electric field reciprocity-based method for measuring space potential below power transmission line |
| CN114778924A (en) * | 2022-06-21 | 2022-07-22 | 华中科技大学 | Three-phase voltage non-contact measurement method and system, electronic device and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349720A (en) * | 2008-08-28 | 2009-01-21 | 重庆电力科学试验研究院 | High pressure overhead power line power frequency electric field shielding analysis method |
| WO2013185267A1 (en) * | 2012-06-15 | 2013-12-19 | 四川电力科学研究院 | Method for measuring three-dimensional power frequency electric field based on transmission line equivalent surface charge curve integral |
-
2019
- 2019-03-14 CN CN201910192605.8A patent/CN109918813A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349720A (en) * | 2008-08-28 | 2009-01-21 | 重庆电力科学试验研究院 | High pressure overhead power line power frequency electric field shielding analysis method |
| WO2013185267A1 (en) * | 2012-06-15 | 2013-12-19 | 四川电力科学研究院 | Method for measuring three-dimensional power frequency electric field based on transmission line equivalent surface charge curve integral |
Non-Patent Citations (6)
| Title |
|---|
| 俞集辉等: "计及地电位升高的超高压交流输电线路工频电场计算", 《高压电器》 * |
| 张予等: "220kV输电线路工频电场分布模型及MATLAB仿真研究", 《中国水运(下半月)》 * |
| 盛剑霓等: "模拟电流法", 《西安交通大学学报》 * |
| 董松昭等: "超高压交流输电线路跨越农业大棚区的电磁环境研究", 《现代电力》 * |
| 邓军等: "云南-广东±800kV特高压直流输电线路可听噪声仿真计算与测试分析", 《高电压技术》 * |
| 陈楠等: "高压输电导线三维工频电磁场计算与测量", 《电网技术》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337732A (en) * | 2020-03-26 | 2020-06-26 | 清华大学 | Voltage measurement method based on electric field inversion |
| CN111337732B (en) * | 2020-03-26 | 2021-08-20 | 清华大学 | Voltage measurement method based on electric field inversion |
| CN112730994A (en) * | 2020-12-22 | 2021-04-30 | 国网天津市电力公司电力科学研究院 | Method and system for obtaining high-voltage alternating-current line electric field based on MATLAB |
| CN112765773A (en) * | 2020-12-25 | 2021-05-07 | 浙江大学 | Method for determining public electric field exposure dose near extra-high voltage direct current transmission line |
| CN113674512A (en) * | 2021-05-31 | 2021-11-19 | 国网陕西省电力公司建设分公司 | Online monitoring and early warning system and method for live cross-over construction site |
| CN114184850A (en) * | 2021-12-07 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | Electric field reciprocity-based method for measuring space potential below power transmission line |
| CN114184850B (en) * | 2021-12-07 | 2023-06-02 | 国网重庆市电力公司电力科学研究院 | Electric field reciprocity-based method for measuring space potential below power transmission line |
| CN114778924A (en) * | 2022-06-21 | 2022-07-22 | 华中科技大学 | Three-phase voltage non-contact measurement method and system, electronic device and storage medium |
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Application publication date: 20190621 |