CN106547953A - A kind of method of acquisition 800kV dc bus metal oxide arrester Potential distributions - Google Patents
A kind of method of acquisition 800kV dc bus metal oxide arrester Potential distributions Download PDFInfo
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- 238000009826 distribution Methods 0.000 title claims abstract description 47
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 23
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 238000013178 mathematical model Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000005684 electric field Effects 0.000 claims description 15
- 239000000725 suspension Substances 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011787 zinc oxide Substances 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 229960001296 zinc oxide Drugs 0.000 abstract 1
- 238000004088 simulation Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000005686 electrostatic field Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 125000001475 halogen functional group Chemical group 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- Thermistors And Varistors (AREA)
Abstract
The invention discloses a kind of method of acquisition 800kV dc bus metal oxide arrester Potential distributions, Potential distribution during operation normal to metal oxide arrester including (1) is emulated：(1 1) set up the three-dimensional mathematical model of metal oxide arrester Potential distribution；The material properties of (1 2) according to each building block of metal oxide arrester, carry out assignment to resistivity；(1 3) apply to force current potential boundary condition；(2) solution calculating is carried out according to the resistivity after assignment and pressure current potential boundary condition to three-dimensional mathematical model, obtains diverse location resistor disc and be short-circuited or by the Potential distribution of the time of tide.Actual size parameter of the present invention according to each part of spark gap, establish the complete threedimensional model of 800kV dc bus Zinc-Oxide Arresters, the peripheral space of spark gap is simulated using limited big air-shed, the current potential of suspended conductor is processed using the Degree-of-freedom Coupling function in ANSYS, spark gap Potential distribution is accurately calculated while calculation scale is simplified.
Description
Technical Field
The invention belongs to the technical field of condition monitoring and fault criterion of an extra-high voltage direct current lightning arrester, and particularly relates to a method for acquiring potential distribution of an 800kV direct current bus metal oxide lightning arrester.
Background
The +/-800 kV extra-high voltage direct current transmission has no middle drop point, can directly transmit a large amount of power to a large-load center, and has the advantages of large transmission capacity, long power transmission distance, power transmission overhead line corridor saving and the like. The construction of the extra-high voltage direct current transmission system does not leave an overvoltage protection device, and the lightning arrester is main equipment for overvoltage protection, is a foundation for insulation coordination of a power grid and guarantees reliable operation, and the insulation performance of the lightning arrester is good or bad, and is directly related to the stability of the operation of the extra-high voltage direct current transmission system.
Because the direct current bus arrester adopts the complicated structure that the resistance card multicolumn is parallelly connected, multisection is established ties, receives normal operating voltage, various inside overvoltage and thunder and lightning overvoltage and external environment factor's influence for a long time, can age gradually or the degradation to the arrester that takes place the leakproofness to lead to sometimes on the scene wets and voltage distribution unreasonable phenomenon, if not being taken care of will cause the incident, endangers direct current transmission system's safe and stable operation.
At present, the research on the potential distribution of the metal oxide arrester is mostly carried out aiming at the alternating current arrester, the potential distribution under the alternating current continuous operation voltage is regarded as the electrostatic field problem, namely, the voltage is distributed in inverse proportion according to the dielectric constant of each medium, but the electric field under the direct current operation voltage does not meet the rule.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a method for acquiring the potential distribution of an 800kV direct current bus metal oxide lightning arrester, and aims to research the potential distribution rule of the 800kV lightning arrester when the 800kV lightning arrester fails or is damaged, so that the technical problem that safety accidents endanger the safe and stable operation of a direct current transmission system is solved.
The invention provides a method for acquiring the potential distribution of a 800kV direct current bus metal oxide lightning arrester, which comprises the following steps:
(1) simulating the potential distribution of the metal oxide lightning arrester during normal operation:
(1-1) establishing a three-dimensional mathematical model of the potential distribution of the metal oxide arrester;
(1-2) assigning values to the resistivity according to the material properties of each component part of the metal oxide arrester;
(1-3) applying a forced potential boundary condition;
(2) and solving and calculating the three-dimensional mathematical model according to the resistivity after assignment and the condition of the forced potential boundary to obtain the potential distribution when the resistance card at different positions is short-circuited or is in the tide.
Further, the three-dimensional mathematical model is:
within the solution area
Imposing an electric potential
Wherein,for describing the distribution of the constant electric field of the metal oxide arrester, gamma is the resistivity of the material, n is the normal direction of the medium surface,the potential value of the external surface of the ith suspension conductor, const is an unknown constant, k is the number of the suspension conductors (such as flanges, anti-corona rings and aluminum gaskets) in the lightning arrester, and gamma isa、γbAndrespectively the resistivity and the surface potential of two adjacent media a and b,is the potential value of the external surface of a medium (such as an anti-halo ring, the earth and the like) with the potential being a fixed value,the potential value is given according to actual conditions (such as 0V, 824kV and the like).
Further, the resistivity values are given as follows:
further, in the step (1-3), the imposed potential boundary condition is: the uppermost anti-corona ring and grading ring are given a continuous operating voltage of 824kV for the arrester, and the lowermost flange, pedestal, ground and at infinity are given 0V.
Further, in the step (2), when the resistive sheet is short-circuited, the boundary conditions of the surface of the short-circuited resistive sheet are as follows:wherein, γfIs the resistivity of the medium adjacent to the short-circuit resistor disc, n is the normal direction of the interface,const is an unknown constant for the surface potential of the shorting resistor disc.
Furthermore, in step (2), when the resistor disc is affected by moisture, the glaze layer or the electroplated layer on the surface of the resistor disc has certain hydrophobicity, moisture can be condensed on the surface of the resistor disc in the form of water drops, and the moisture serves as a passive medium, and the following Laplace equation and boundary conditions are satisfied in a constant electric field:wherein, γWater (W)1000 Ω · m is the resistivity of water, γwIs the resistivity of the medium adjacent to moisture;andthe water and the potential value to be obtained in the adjacent dielectric medium respectively, and n is the normal direction of the interface.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) according to the actual size parameters of each part of the lightning arrester, a complete three-dimensional model of the 800kV direct current bus zinc oxide lightning arrester is established, a limited large air area is used for simulating the peripheral space of the lightning arrester, and the potential of a suspended conductor is processed by using the freedom degree coupling function in ANSYS, so that the calculation scale is simplified, and the potential distribution of the lightning arrester is accurately calculated.
(2) According to the theory of a constant electric field, electric field parameters and boundary conditions of the arrester in the case of being affected with damp or short-circuited at different positions are modified on the basis of an original model, so that the potential distribution in the case of being affected with the damp or the short-circuited at different positions and different serial section numbers can be accurately calculated and analyzed, the potential distribution change rule in the case of fault is researched through software simulation, and the complex operation of a field test is avoided.
Drawings
FIG. 1 is a schematic diagram of an integral three-dimensional model of an 800kV DC bus arrester according to an embodiment of the invention;
FIG. 2 is a schematic outside air field of an embodiment of the present invention;
FIG. 3 is a schematic diagram of resistive patch meshing according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of air domain meshing according to an embodiment of the present invention;
FIG. 5 is a potential equipotential plot at the meridian plane of the MOA axis of an embodiment of the present invention;
FIG. 6 is a schematic diagram of the potential distribution of the MOA in normal operation according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of voltage share of a third node under different short-circuit conditions according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a model of different moisture degrees of a resistor disc according to an embodiment of the invention; wherein, (a) is 12 water column models, (b) is 24 water column models, and (c) is 36 water column models;
FIG. 9 is a schematic diagram of the potential distribution of the different nodes under the influence of moisture according to the embodiment of the present invention; wherein, (a) is the potential distribution of the first section with different degrees of moisture, and (b) is the potential distribution of the second section with different degrees of moisture, and (c) is the potential distribution of the third section with different degrees of moisture, and (d) is the potential distribution of the fourth section with different degrees of moisture, and (e) is the potential distribution of the fifth section with different degrees of moisture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The simulation calculation model for potential distribution of the 800kV direct current bus metal oxide arrester provided by the invention overcomes the defects, a complete three-dimensional model is established by adopting ANSYS software according to the actual size of the arrester, and corresponding boundary conditions are applied to the arrester model according to the theory of a constant electric field aiming at different running conditions (normal, short circuit or damp), so that the potential distribution rule of the 800kV direct current bus arrester in short circuit or damp at different positions can be calculated, and a reasonable and reliable fault criterion is provided for online monitoring of the arrester.
The embodiment of the invention provides a method for obtaining potential distribution of a 800kV direct current bus metal oxide arrester (MOA for short), which comprises the following steps:
(1) and (3) carrying out simulation calculation on potential distribution during normal operation of the MOA:
(1-1) establishing a three-dimensional mathematical model of MOA potential distribution:
under the long-term direct current working voltage, the leakage current flowing through the MOA resistance card is mainly resistive current, and the MOA can be regarded as a network consisting of equivalent resistors, namely the potentials of all parts in the lightning arrester are distributed according to the resistivity, so that the potential distribution problem of the MOA can be converted into an electrostatic field problem to be solved. If it is usedTo describe the distribution of its field, the arrester potential function is a solution that satisfies the following boundary value problem throughout the solution domain V.
Wherein,for describing the distribution of the constant electric field of the metal oxide arrester, gamma is the resistivity of the material, n is the normal direction of the medium surface,the potential value of the external surface of the ith suspension conductor, const is an unknown constant, k is the number of the suspension conductors (such as flanges, anti-corona rings and aluminum gaskets) in the lightning arrester, and gamma isa、γbAndrespectively the resistivity and the surface potential of two adjacent media a and b,is the potential is fixedThe potential value of the outer surface of the medium of value (such as an anti-halo, earth, etc.),the potential value is given according to actual conditions (such as 0V, 824kV and the like).
And (1-2) assigning parameters. The resistivity γ in equation (1) is assigned according to the material properties of each component part of M θ a, as shown in table 1:
TABLE 1 Properties of the materials of the elements
| Name of element | Resistivity Ω · m |
| Air (a) | 1014 |
| Metal flanges, gaskets, etc | 0 |
| Porcelain piece | 2.5×1012 |
| Insulating cylinder and insulating rod | 1013 |
| Zinc oxide resistance card | 1012 |
(1-3) applying a forced potential boundary condition. The continuous operation voltage 824kV of the lightning arrester is given to the uppermost anti-corona ring and the grading ring, 0V is given to the lowermost flange, the base, the ground and the infinite distance, and the solution of the constant electric field can be carried out on the MOA.
(2) For the potential distribution calculation when the resistance cards at different positions are short-circuited or are affected by tide, the electric field parameters and the boundary conditions are correspondingly modified only on the basis of the three-dimensional mathematical model, and the specific method comprises the following steps:
(2-1) when the resistive sheet is short-circuited, the effect of the resistive sheet in a constant electric field is the same as that of a conductor, so that the boundary condition of the surface of the short-circuited resistive sheet needs to be modified as follows:
wherein,to short-circuit the surface potential of the resistive sheet, gammafN is the normal to the interface, and is the resistivity of the medium adjacent to the shorting resistor disc. And the rest parameters and the boundary conditions are unchanged, so that the potential simulation calculation is performed when the different positions of the MOA are short-circuited.
(2-2) when the resistance chip is affected with moisture, considering that the glaze layer or the electroplated layer on the surface of the resistance chip has certain hydrophobicity, moisture can be condensed on the surface of the resistance chip in the form of water drops, and the moisture serves as a passive medium and meets the following Laplace equation and boundary conditions in a constant electric field:
wherein, γWater (W)1000 Ω · m is the resistivity of water, γwIs the resistivity of the medium adjacent to moisture;andthe water and the potential value to be obtained in the adjacent dielectric medium respectively, and n is the normal direction of the interface. And remaining parameters and boundary conditions are unchanged, so that potential simulation calculation is performed when different sections of the MOA are affected by tide.
In order to verify the method for acquiring the potential distribution of the 1000kV metal oxide lightning arrester, ANSYS finite element analysis software is used for building the three-dimensional model shown in the formula (1), the potential distribution under different operating conditions is subjected to simulation calculation, and the correctness of the model and the simulation result is verified by comparing with a field test result and carrying out electrostatic field theoretical analysis. The specific implementation flow is as follows:
(1) a three-dimensional model is built according to actual size parameters of each part of the MOA, as shown in figure 1, and a 40000 multiplied by 80000 (unit: mm) cuboid external air domain is built to be bonded with the MOA, so that the field quantity (potential, field strength and the like) has continuity on the interface, as shown in figure 2. Then, the resistivity of each part is assigned, and the MOA body and the air region are subjected to tetrahedral meshing, wherein the meshing is shown in fig. 3 and 4, the surface potentials of the metal conductors in a constant electric field are equal everywhere, so that the metal conductors do not participate in the meshing, and the surface node potentials of the flange, the anti-halo ring, the aluminum gasket and other elements composed of the metal conductors are subjected to freedom coupling. And finally, applying boundary conditions to the three-dimensional model, endowing the continuous operation voltage 824kV of the lightning arrester to the uppermost flange and the anti-corona ring, and endowing 0V to the lowermost flange, the base and the outer surface of the air region, so that the MOA can be subjected to constant electric field solution.
(2) According to the boundary conditions set in the step (1), the potential distribution of the MOA in normal operation is subjected to simulation calculation, and the potential equipotential diagram on the meridian plane of the lightning arrester shaft and the voltage share of each resistance sheet are respectively shown in the graph of 5 and 6 (five MOA sections are respectively a first section, a second section, a third section, a fourth section and a fifth section from top to bottom, each section has 60 resistance sheets connected in series, 5 sections have 300 resistance sheets in total, and the number of the five MOA sections is 1-300 from top to bottom). It can be seen that, because the magnitude order difference between the resistivity of the zinc oxide resistance chip and the resistivity of the surrounding medium is large, under the direct current continuous operation voltage, the leakage current hardly exists in the surrounding medium, and the voltage share of the resistance chip is only related to the resistivity of the resistance chip, namely, the voltage share of the MOA resistance chip under the direct current operation voltage is 1.
(3) According to the theory in (2-1), the resistance sheets of the third section are selected as the object of study, and when the resistance sheets at different positions and different numbers are short-circuited, the voltage share of the fault column is as shown in fig. 7 (the voltage share of the short-circuited resistance sheets is 0, which is not shown in the figure).
As can be seen from fig. 7, the potential distribution of the normal resistive patches is still uniform, and the larger the number of the short-circuit resistive patches is, the more the voltage share of the normal resistive patches is increased, and the position of the short-circuit resistive patches in the section is irrelevant.
(4) And (3) attaching the semi-cylindrical water band with the radius of 3mm to the surface of the damped resistor disc according to the theory in the step (2-2) to serve as a simulation model for MOA single-section damping. In order to simulate different moisture degrees of the MOA, the number of the water belts is respectively 12, 24 and 36 (evenly distributed on the surface of the resistor disc), as shown in FIG. 8. The first, second, third, fourth and fifth sections are set to be in the damp state respectively, different numbers of water band models are applied according to different damp degrees, and the simulation result of the potential distribution is shown in fig. 9.
It can be seen that the voltage share of the resistor disc in the damped arrester section is reduced, and the moisture on the surface of the resistor disc is more, the damping degree is more serious, and the voltage share is lower. According to the analysis from the angle of the electrostatic field, the water column attached to the periphery of the resistance card is equivalent to a parallel capacitor, so that the overall equivalent capacitance of the damp resistance card is increased, and the voltage in the electrostatic field is distributed in an inverse proportion according to the capacitance, so that the voltage bearing rate of the damp resistance card is reduced.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for obtaining potential distribution of a 800kV direct current bus metal oxide lightning arrester is characterized by comprising the following steps:
(1) simulating the potential distribution of the metal oxide lightning arrester during normal operation:
(1-1) establishing a three-dimensional mathematical model of the potential distribution of the metal oxide arrester;
(1-2) assigning values to the resistivity according to the material properties of each component part of the metal oxide arrester;
(1-3) applying a forced potential boundary condition;
(2) and solving and calculating the three-dimensional mathematical model according to the resistivity after assignment and the condition of the forced potential boundary to obtain the potential distribution when the resistance card at different positions is short-circuited or is in the tide.
2. The method of claim 1, wherein the three-dimensional mathematical model is:
wherein,(x, y, z) is used to describe the distribution of the constant electric field of the metal oxide arrester, γ is the resistivity of the material, n is the normal to the surface of the medium,is the potential value of the external surface of the i-th suspension conductor, const is an unknown constant, k is the number of the suspension conductors in the lightning arrester, and gammaa、γbAnd respectively the resistivity and the surface potential of two adjacent media a and b,is the value of the potential of the outer surface of the medium at which the potential is a fixed value,the potential value is given according to actual conditions.
3. The method of claim 1 or 2, wherein the resistivity is assigned as follows:
4. a method according to any one of claims 1 to 3, wherein in step (1-3) the imposed potential boundary conditions are: the uppermost anti-corona ring and grading ring are given a continuous operating voltage of 824kV for the arrester, and the lowermost flange, pedestal, ground and at infinity are given 0V.
5. The method according to any one of claims 1 to 4, wherein in the step (2), when the resistor sheet is short-circuited, the boundary conditions of the short-circuited resistor sheet surface are as follows:wherein, γfIs the resistivity of the medium adjacent to the short-circuit resistor disc, n is the normal direction of the interface,const is an unknown constant for the surface potential of the shorting resistor disc.
6. The method as claimed in any one of claims 1 to 4, wherein in step (2), when the resistor is affected by moisture, the glaze layer or the electroplated layer on the surface of the resistor has certain hydrophobicity, moisture is condensed on the surface of the resistor in the form of water drops, and the moisture serves as a passive medium which satisfies the following Laplace equation and boundary conditions in a constant electric field:wherein, γWater (W)1000 Ω · m is the resistivity of water, γwIs the resistivity of the medium adjacent to moisture; andthe water and the potential value to be obtained in the adjacent dielectric medium respectively, and n is the normal direction of the interface.
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| CN107091966A (en) * | 2017-06-12 | 2017-08-25 | 国网辽宁省电力有限公司电力科学研究院 | A kind of method for determining the maximum allowable resistive leakage current of Zinc-Oxide Arrester |
| CN111044812A (en) * | 2019-11-25 | 2020-04-21 | 国网江苏省电力有限公司电力科学研究院 | Method for estimating electrostatic voltage of grading ring of lightning arrester in transformer substation |
| CN111507034A (en) * | 2020-04-15 | 2020-08-07 | 广东电科院能源技术有限责任公司 | Method and system for calculating time-varying characteristic of lightning arrester temperature field under impact load |
| CN111985075A (en) * | 2020-07-03 | 2020-11-24 | 国网山东省电力公司电力科学研究院 | Temperature distribution calculation method and system suitable for zinc oxide arrester |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091966A (en) * | 2017-06-12 | 2017-08-25 | 国网辽宁省电力有限公司电力科学研究院 | A kind of method for determining the maximum allowable resistive leakage current of Zinc-Oxide Arrester |
| CN111044812A (en) * | 2019-11-25 | 2020-04-21 | 国网江苏省电力有限公司电力科学研究院 | Method for estimating electrostatic voltage of grading ring of lightning arrester in transformer substation |
| CN111044812B (en) * | 2019-11-25 | 2021-11-09 | 国网江苏省电力有限公司电力科学研究院 | Method for estimating electrostatic voltage of grading ring of lightning arrester in transformer substation |
| CN111507034A (en) * | 2020-04-15 | 2020-08-07 | 广东电科院能源技术有限责任公司 | Method and system for calculating time-varying characteristic of lightning arrester temperature field under impact load |
| CN111507034B (en) * | 2020-04-15 | 2023-05-16 | 南方电网电力科技股份有限公司 | Method and system for calculating time-varying characteristics of lightning arrester temperature field under impact load |
| CN111985075A (en) * | 2020-07-03 | 2020-11-24 | 国网山东省电力公司电力科学研究院 | Temperature distribution calculation method and system suitable for zinc oxide arrester |
| CN111985075B (en) * | 2020-07-03 | 2024-03-26 | 国网山东省电力公司电力科学研究院 | Temperature distribution calculation method and system suitable for zinc oxide lightning arrester |
| CN112541262A (en) * | 2020-12-07 | 2021-03-23 | 中车青岛四方机车车辆股份有限公司 | Lightning arrester installation position positioning method and system, electronic equipment and storage medium |
| CN112541262B (en) * | 2020-12-07 | 2022-11-22 | 中车青岛四方机车车辆股份有限公司 | Lightning arrester installation position positioning method and system, electronic equipment and storage medium |
| CN112864808A (en) * | 2020-12-31 | 2021-05-28 | 国网电力科学研究院武汉南瑞有限责任公司 | Method for optimizing potential distribution of lightning arrester by changing arrangement mode of voltage-sharing capacitors |
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