CN106557618A - A kind of transformer station's electric field appraisal procedure - Google Patents
A kind of transformer station's electric field appraisal procedure Download PDFInfo
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- CN106557618A CN106557618A CN201610958010.5A CN201610958010A CN106557618A CN 106557618 A CN106557618 A CN 106557618A CN 201610958010 A CN201610958010 A CN 201610958010A CN 106557618 A CN106557618 A CN 106557618A
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Abstract
The present invention proposes a kind of transformer station's electric field appraisal procedure, comprises the steps：S1：Simulation calculation is carried out to the electric field of the transmission line of electricity of required measurement and the electric field of transformer station's median generatrix with Analogue charge method；S2：The distribution of measured zone and measurement point is determined with simulation result as theoretical foundation, the present invention can be suitable for the electromagnetism distribution situation of more complicated power transmission and transforming equipment each frequency band of physical features, arrangement of conductors situation.
Description
Technical field
The invention belongs to technical field of electric power, more particularly to a kind of transformer station's electric field appraisal procedure.
Background technology
At present, with regard to the electromagnetic environment problem around ehv power transmission equipment, American scholar early in 1972,500kV
Transmission line of electricity start using when just put forward.Extra high voltage network causes electromagnetic radiation source mainly to have：Transmission line of electricity
The local of the high voltage on conductor and the highfield produced by high current and magnetic field, conductive surface corona discharge and various electrical bodies
The clutter of the various frequencies that electric discharge etc. causes.The external electromagnetic environment problem to extra high voltage network has done substantial amounts of grinding
Study carefully work, and some corresponding standards have been formulated in terms of electromagnetic compatibility and environmental protection, to limit extra high voltage network product
The raw interference of electromagnetic field.As Japan is explicitly pointed out in the electrical equipment technology standard the 112nd article the 3rd of modification in 1976, it is considered to
Impact to human body, it is stipulated that the electric-field intensity at height from the ground is for 1m should be below 3kV/m.In U.S. electric safety standard
(NESC) though etc. do not have in file under clear stipulaties extra high voltage network electric-field intensity permissible value, generally take 8～
10kV/m.Nineteen eighty-two, international conference on large HV electric systems (C I GRE) the 36.01st working group organize nine national experts to write《It is defeated
Electric field and magnetic field that electric system is produced --- phenomenon description, practical analysis directive/guide》, it is quiet with regard to power system that the book summarizes various countries
, on ecological with the presence or absence of the more consistent view for affecting, the directive/guide has for the calculating of electric induction, measuring technology and power frequency electric field
It is of great importance.International Electrical and Electronic Engineering Association (I EEE) have successively formulated transmission line of electricity in 1979 to nineteen ninety
The standard definition of the corona of generation and its standard definition, the corona that transmission line of electricity is produced and radio noise of field-effect, measurement are handed over
The standardization program of the radio noise that the standardization program of stream power transmission line power frequency electromagnetic field, measurement transmission line of electricity and transformer station produce
Deng.As the past industrial foundation of China is weaker, electromagnetic environment harm not yet fully exposes, simultaneous to electromagnetism
The work is started late and larger with international gap.The laws and regulations on the management of correlation have been put into effect at present.State
The interior scholar sensing of alternating magnetic field in human body under the electromagnetic field near supertension line magnetic distribution, steel tower, trolley line
The aspects such as Current calculation, residential area inner high voltage power transmission line power frequency electromagnetic pollution distribution and route survey have corresponding research.This
Study main application simulation charge method a bit to solve the computational problem of extra high voltage network magnetic distribution, great majority research
It is two dimensional model, is suitable for the relatively flat plains region of physical features.Domestic some research institutions are to built high voltage transmission line
Lower section has carried out in-site measurement research with the electromagnetic environment in transformer station, and Wuhan High Voltage Research Institute is under the power transmission line of 500kV Pingwus
Built the test house owed by a citizen of a building brick and tile mixed structure, to around house, within doors, size and the distribution of balcony and roof electric field
Rule is tested.Due to the height of the electromagnetic environment in ultra-high-tension power transmission line and transformer station and circuit, temperature, humidity, air pressure,
Earth's surface shape, around vegetation and whether there is building etc. and have a very big relation, different region from it is different under conditions of surveyed
The result of amount has very big difference.And what is focused on mostly is the research of power frequency electromagnetic field at present, it is believed that the spoke that power transmission and transformation are produced
Penetrate mainly power frequency field, but the higher transmission line of electricity of electric pressure and transformer station, and the pollution for producing high frequency electromagnetic radiation
Source, so should also obtain enough attention.Generally speaking, domestic numerical simulation in supertension line magnetic distribution and existing
Achieved with certain achievement in terms of field measurement research, but it is ripe not enough.
Therefore, need now a kind of transformer station's electric field appraisal procedure badly, physical features, arrangement of conductors situation can be suitable for more multiple
The electromagnetism distribution situation of miscellaneous each frequency band of power transmission and transforming equipment.
The content of the invention
The present invention proposes a kind of transformer station's electric field appraisal procedure, solves prior art China inherence supertension line electromagnetism
Achieved with certain achievement in terms of the numerical simulation and in-site measurement research of field distribution, but problem ripe not enough.
The technical scheme is that what is be achieved in that：Transformer station's electric field appraisal procedure, comprises the steps：
S1：Imitated with electric field of the Analogue charge method to the electric field of the transmission line of electricity of required measurement with transformer station median generatrix
It is true to calculate；
S2：The distribution of measured zone and measurement point is determined with simulation result as theoretical foundation.
As one kind preferred embodiment, in step S1, Analogue charge method includes：
S11：N charge simulation Q arrange outside field domain being calculatedj(j=1,2,3 ... n)；
S12：On the electrode surface of given boundary condition, the match point that quantity is equal to charge simulation number is set, each
Potential value φ with pointi(i=1,2,3 ... n) is known；For hypermedia situation, match point is set on interface,
The interface condition of different medium is met on these aspects；
S13：According to principle of stacking, corresponding to each match point, can be listed by produced by the charge simulation for setting one by one
Potential equation or the equation set up by interface condition, i.e. First Boundary Condition and interface condition, using first kind side
Boundary's condition and interface condition combination constitute a linear algebraic equation systems, i.e. charge simulation equation group；
S14：Charge simulation equation group is solved, the electricity of charge simulation is obtained；
S15：Several checkpoints are separately taken on border or interface, computational accuracy is verified, if undesirable, is weighed
New amendment charge simulation, till meeting required precision；
S16：Based on satisfactory charge simulation, the electric-field intensity in field at any point can be by each charge simulation
The electric field superposition synthesis that analytic solutions are produced.
As one kind preferred embodiment, in step S13, First Boundary Condition is expressed as：
Formula 1.1.
As one kind preferred embodiment, in step S13, interface condition meets：
Formula 1.2.
As one kind preferred embodiment, linear algebraic equation systems are set up in step S13 and is expressed as：
Formula 1.3, the element P of the coefficient matrix [P] in formulaijRepresent that j-th unit charge simulation is produced on i-th match point
Raw potential value, so PijThe referred to as coefficient of potential, [P] are referred to as coefficient of potential matrix.
As one kind preferred embodiment, the calculating of the coefficient of potential meets：According between A wires and B wires apart from L1,
Between A and B image conductors apart from L2, determine whether wire is split conductor, determine whether wire is that division is led according to L1 and L2
Line, when no, determines coefficient of potential matrix, when being, determines coefficient of potential matrix according to the equivalent redius of wire.
As one kind preferred embodiment, equivalent redius meets：
Formula 1.4, R- split conductor radiuses, wire radical of n-, wire radius of r-.
As one kind preferred embodiment, the electric-field intensity at arbitrfary point can be produced by the analytic solutions of each charge simulation
Raw electric field superposition synthesis, including the equivalent quantity of electric charge for determining conductor, it is then determined that the electric-field intensity of arbitrfary point point
Amount：Ex and Ey, wherein Ex parallel to ground, Ey perpendicular to ground, according to electric-field intensity on space x and y component time
Situation of change, determines the time domain representation form of blended space electric-field intensity.
After employing above-mentioned technical proposal, the invention has the beneficial effects as follows：By to the electricity at transformer station's electric field arbitrfary point
Field intensity is simulated the parsing of electric charge, and synthesis is overlapped to electric field, determines the equivalent quantity of electric charge, is then become according to time domain
Change, determine the intensity of space electric field, then electric charge is emulated, after emulation, determine the distribution of measured zone and measurement point, this
Invention both can guarantee that the accuracy of the strength assessment of transformer station's electric field, and fairly simple, can be suitable for physical features, arrangement of conductors feelings
The electromagnetism distribution situation of more complicated power transmission and transforming equipment each frequency band of condition.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the present invention；
Fig. 2 is the schematic flow sheet of charge simulation in the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Figure 1-2, this transformer station electric field appraisal procedure, comprises the steps：
S1：Imitated with electric field of the Analogue charge method to the electric field of the transmission line of electricity of required measurement with transformer station median generatrix
It is true to calculate；
S2：The distribution of measured zone and measurement point is determined with simulation result as theoretical foundation.
As one kind preferred embodiment, in step S1, Analogue charge method includes：
S11：N charge simulation Q arrange outside field domain being calculatedj(j=1,2,3 ... n)；
S12：On the electrode surface of given boundary condition, the match point that quantity is equal to charge simulation number is set, each
Potential value φ with pointi(i=1,2,3 ... n) is known；For hypermedia situation, match point is set on interface,
The interface condition of different medium is met on these aspects；
S13：According to principle of stacking, corresponding to each match point, can be listed by produced by the charge simulation for setting one by one
Potential equation or the equation set up by interface condition, i.e. First Boundary Condition and interface condition, using first kind side
Boundary's condition and interface condition combination constitute a linear algebraic equation systems, i.e. charge simulation equation group；
S14：Charge simulation equation group is solved, the electricity of charge simulation is obtained；
S15：Several checkpoints are separately taken on border or interface, computational accuracy is verified, if undesirable, is weighed
New amendment charge simulation, till meeting required precision；
S16：Based on satisfactory charge simulation, the electric-field intensity in field at any point can be by each charge simulation
The electric field superposition synthesis that analytic solutions are produced.
As one kind preferred embodiment, in step S13, First Boundary Condition is expressed as：
Formula 1.1.
In step S13, interface condition meets：
Formula 1.2.
Set up linear algebraic equation systems to be expressed as in step S13：
Formula 1.3, the element P of the coefficient matrix [P] in formulaijRepresent that j-th unit charge simulation is produced on i-th match point
Raw potential value, so PijThe referred to as coefficient of potential, [P] are referred to as coefficient of potential matrix.
The calculating of the coefficient of potential meets：According between A wires and B wires apart between L1, A and B image conductors apart from L2,
Determine whether wire is split conductor, determine whether wire is split conductor according to L1 and L2, when no, determine coefficient of potential square
Battle array, when being, determines coefficient of potential matrix according to the equivalent redius of wire.
Equivalent redius meets：
Formula 1.4, R- split conductor radiuses, wire radical of n-, wire radius of r-.
Electric-field intensity at arbitrfary point can be synthesized by the electric field superposition that the analytic solutions of each charge simulation are produced, including true
Determine the equivalent quantity of electric charge of conductor, it is then determined that the electric-field intensity component of arbitrfary point：Ex and Ey, wherein Ex is parallel to ground
Face, Ey determine blended space electric field perpendicular to ground according to the situation of change of electric-field intensity component time on space x and y
The time domain representation form of intensity.
The operation principle of transformer station's electric field appraisal procedure is：By entering to the electric-field intensity at transformer station's electric field arbitrfary point
The parsing of row charge simulation, and synthesis is overlapped to electric field, determine the equivalent quantity of electric charge, then changed according to time domain, it is determined that empty
Between electric field intensity, then electric charge is emulated, the distribution of measured zone and measurement point after emulation, is determined, the present invention can be protected
The accuracy of the strength assessment of card transformer station electric field, but it is fairly simple, physical features, arrangement of conductors situation can be suitable for more complicated
Power transmission and transforming equipment each frequency band electromagnetism distribution situation.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of transformer station's electric field appraisal procedure, it is characterised in that comprise the steps：
S1：Emulation meter is carried out to the electric field of the transmission line of electricity of required measurement and the electric field of transformer station's median generatrix with Analogue charge method
Calculate；
S2：The distribution of measured zone and measurement point is determined with simulation result as theoretical foundation.
2. transformer station's electric field appraisal procedure according to claim 1, it is characterised in that Analogue charge method bag in step S1
Include：
S11：N charge simulation Q arrange outside field domain being calculatedj(j=1,2,3 ... n)；
S12：On the electrode surface of given boundary condition, the match point that quantity is equal to charge simulation number, each match point are set
Potential value φi(i=1,2,3 ... n) is known；For hypermedia situation, match point is set on interface, at this
The interface condition of different medium is met on a little points；
S13：According to principle of stacking, corresponding to each match point, the current potential by produced by the charge simulation for setting can be listed one by one
Equation or the equation set up by interface condition, i.e. First Boundary Condition and interface condition, using first boundary bar
Part and interface condition combination constitute a linear algebraic equation systems, i.e. charge simulation equation group；
S14：Charge simulation equation group is solved, the electricity of charge simulation is obtained；
S15：Several checkpoints are separately taken on border or interface, computational accuracy is verified, if undesirable, is repaiied again
Positive charge simulation, till meeting required precision；
S16：Based on satisfactory charge simulation, the electric-field intensity in field at any point can be by the parsing of each charge simulation
The electric field superposition synthesis that solution is produced.
3. transformer station's electric field appraisal procedure according to claim 2, it is characterised in that first boundary bar in step S13
Part is expressed as：
Formula 1.1.
4. transformer station's electric field appraisal procedure according to claim 3, it is characterised in that interface condition is full in step S13
Foot：
Formula 1.2.
5. transformer station's electric field appraisal procedure according to claim 4, it is characterised in that linear algebra is set up in step S13
Equation group is expressed as：
Formula 1.3, the element P of the coefficient matrix [P] in formulaijRepresent that j-th unit charge simulation is produced on i-th match point
Potential value, so PijThe referred to as coefficient of potential, [P] are referred to as coefficient of potential matrix.
6. transformer station's electric field appraisal procedure according to claim 5, it is characterised in that the calculating of the coefficient of potential meets：Root
According between A wires and B wires apart between L1, A and B image conductors apart from L2, determine whether wire is split conductor, according to L1
Determine whether wire is split conductor with L2, when no, determine coefficient of potential matrix, when being, according to the equivalent redius of wire
Determine coefficient of potential matrix.
7. transformer station's electric field appraisal procedure according to claim 6, it is characterised in that equivalent redius meets：
Formula 1.4, R- split conductor radiuses, wire radical of n-, wire radius of r-.
8. transformer station's electric field appraisal procedure according to claim 7, it is characterised in that can to the electric-field intensity at arbitrfary point
By each charge simulation analytic solutions produce electric field superposition synthesize, including determination conductor the equivalent quantity of electric charge, so
The electric-field intensity component of arbitrfary point is determined afterwards：Ex and Ey, wherein Ex parallel to ground, Ey perpendicular to ground, according to electric-field intensity
On space x and y, the situation of change of component time, determines the time domain representation form of blended space electric-field intensity.
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Cited By (4)
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| CN109344431A (en) * | 2018-08-24 | 2019-02-15 | 国网安徽省电力有限公司建设分公司 | The method for accurately calculating conductive line surfaces electric field strength based on Analogue charge method |
| CN112067908A (en) * | 2020-08-20 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Fitting method and system for distortion electric field when transformer substation robot measures power frequency electric field |
| CN112924765A (en) * | 2021-02-02 | 2021-06-08 | 江苏方天电力技术有限公司 | Method and device for setting electromagnetic environment monitoring points of transformer substation |
| CN113945802A (en) * | 2021-10-25 | 2022-01-18 | 国网重庆市电力公司电力科学研究院 | Method and device for measuring space potential below high-voltage transmission line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109344431A (en) * | 2018-08-24 | 2019-02-15 | 国网安徽省电力有限公司建设分公司 | The method for accurately calculating conductive line surfaces electric field strength based on Analogue charge method |
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| CN112067908A (en) * | 2020-08-20 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Fitting method and system for distortion electric field when transformer substation robot measures power frequency electric field |
| CN112924765A (en) * | 2021-02-02 | 2021-06-08 | 江苏方天电力技术有限公司 | Method and device for setting electromagnetic environment monitoring points of transformer substation |
| CN113945802A (en) * | 2021-10-25 | 2022-01-18 | 国网重庆市电力公司电力科学研究院 | Method and device for measuring space potential below high-voltage transmission line |
| CN113945802B (en) * | 2021-10-25 | 2023-06-20 | 国网重庆市电力公司电力科学研究院 | Method and device for measuring space potential below high-voltage transmission line |
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