Conductor corona inception field intensity calculation method considering altitude influence and related device

Abstract

The invention discloses a conductor corona inception field intensity calculation method considering altitude influence and a related device, and belongs to the technical field of conductor corona inception field intensity calculation. The method comprises the following steps: obtaining a first corona inception field intensity expression considering the altitude influence through an ionization coefficient of Morrow and electron adsorption; obtaining a second corona inception field intensity expression through the property of the ionization boundary; setting an ionization region boundary value d = d0, and respectively calculating to obtain a first inception corona field intensity and a second inception corona field intensity; when the two corona inception field intensities do not meet the preset precision requirement, changing the ionization region boundary value d, and recalculating the first corona inception field intensity and the second corona inception field intensity until the preset precision requirement is met; and substituting the ionization region boundary value d meeting the requirement into the first corona inception field intensity expression, and calculating to obtain the conductor corona inception field intensity considering the altitude influence. According to the invention, the corona inception field intensity of the conductor under the conditions of different conductor radiuses, ground heights and altitudes can be determined. The calculated corona inception field intensity of the positive and negative electrode wires and the maximum error of the experimental ratio do not exceed 1%.

Description

Technical Field

[0001] The invention belongs to the technical field of conductor corona initiation field strength calculation, and relates to a conductor corona initiation field strength calculation method taking altitude influence into consideration and a related device. Background Art

[0002] The accurate calculation of the conductor corona induction field strength is extremely important for the stable operation of the power system and ensuring the efficiency and quality of power transmission. It is not only related to the safety performance of power facilities, but also directly affects the energy loss and environmental adaptability.

[0003] Based on a large amount of experimental data and in-depth research, outstanding scholars such as Peek and Whitehead proposed an empirical formula for conductor corona initiation that takes into account the factors of air pressure and conductor radius. This formula provides a strong theoretical support for the study of conductor corona initiation. However, it is worth noting that these experiments are mainly carried out around coaxial cylindrical structures. Therefore, when this empirical formula is applied to the wire plate electrode system, its prediction effect is not very ideal. Specifically, compared with the actual experimental results, the maximum error of the positive conductor reached 2.63%, while the maximum error of the negative conductor could reach 2.8%. This error level may lead to misjudgment of the conductor corona initiation phenomenon in practical applications, thereby affecting the safe and stable operation of the power system.

[0004] In addition, when the empirical formula is further extended to the actual split conductor scenario, its engineering practicality is relatively poor. As an important structural form in modern high-voltage transmission systems, the electrical performance and environmental adaptability of split conductors are relatively complex. The empirical formula proposed by Peek, Whitehead and others failed to fully consider the unique electrical characteristics of split conductors and the various complex factors in the actual operating environment, such as temperature and humidity. Changes in these environmental factors often have a significant impact on the corona initiation field strength of the conductor, but the existing empirical formula cannot accurately reflect these effects, thus limiting its application effect in actual engineering.

[0005] In summary, although the empirical formula for conductor corona initiation proposed by Peek, Whitehead and other scholars has certain reference value under specific conditions, its accuracy and practicality have certain limitations when facing more complex and changeable practical application scenarios. Therefore, in order to more accurately calculate the conductor corona initiation field strength and optimize the design and operation of the power system, it is urgent to develop a method for calculating the conductor corona initiation field strength that takes into account the influence of altitude. Summary of the invention

[0006] The purpose of the present invention is to provide a method and related device for calculating the conductor corona initiation field strength taking into account the influence of altitude, so as to solve the technical problem that it is difficult to accurately calculate the conductor corona initiation field strength under different conductor radii, heights above the ground and altitudes in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for calculating the conductor corona initiation field strength taking into account the influence of altitude, comprising the following steps:

[0009] The Morrow's ionization coefficient and electron adsorption coefficient formula are fitted into a cubic function, and substituted into the ionization integral Q to obtain the first halo field strength expression considering the altitude effect.

[0010] The second corona onset field strength expression is obtained through the properties of the ionization boundary;

[0011] Set the ionization zone boundary value d = d 0 , and substitute them into the first and second onset field strength expressions respectively to calculate the first and second onset field strengths;

[0012] When the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement, the ionization zone boundary value d is changed, and the first corona onset field strength and the second corona onset field strength are recalculated until the preset accuracy requirement is met and the ionization zone boundary value d is output;

[0013] Substitute the output ionization zone boundary value d into the first corona onset field strength expression to calculate the conductor corona onset field strength taking into account the influence of altitude.

[0014] Furthermore, the Morrow's ionization coefficient and electron adsorption coefficient formula are:

[0015]

[0016]

[0017] Where α is the ionization coefficient; η is the electron adsorption coefficient; N is the number density of gas molecules; and E is the electric field strength.

[0018] Furthermore, the method for determining the ionization integral Q is:

[0019] The corona inception voltage is determined experimentally, and then the field strength distribution is calculated using the nominal electric field analytical formula. Then lnQ can be calculated by integrating from the surface of the conductor to the place where the reduced electric field strength is 0.

[0020] Furthermore, the first fainting field strength expression is:

[0021]

[0022] Where P is the air pressure at a certain altitude; P 0 is standard atmospheric pressure; E c1 is the first halo field strength considering the influence of altitude; a is the wire radius; Q is the ionization integral; d is the boundary value of the ionization zone; δ is the relative air density.

[0023] Furthermore, the second fainting field strength expression is:

[0024]

[0025] In the formula, E c2 is the second corona field strength; h is the height of the conductor above the ground; δ is the relative air density; d is the boundary value of the ionization zone; a is the radius of the conductor.

[0026] Furthermore, the ionization zone boundary value d=d 0 , and respectively substitute into the first and second onset field strength expressions, and the steps of calculating the first and second onset field strengths include:

[0027] Get the air pressure, humidity, temperature and wire radius corresponding to the given altitude; set the ionization zone boundary value d = d 0 , substitute into the first onset field strength expression to calculate the first onset field strength E c1 ;

[0028] The height of the conductor above the ground h, the radius of the conductor a and the boundary value of the ionization zone d = d 0 Substitute into the second onset field strength expression, and calculate the second onset field strength E c2 .

[0029] Furthermore, the preset accuracy requirement is: |E c1 -E c2 | / E c2 <0.01%.

[0030] In a second aspect, the present invention provides a wire corona initiation field strength calculation system taking into account the influence of altitude, comprising:

[0031] The first halo field strength module is used to fit Morrow's ionization coefficient and electron adsorption coefficient formula into a cubic function, and substitute it into the ionization integral Q to obtain the first halo field strength expression considering the altitude effect;

[0032] The second corona onset field strength module is used to obtain the second corona onset field strength expression through the properties of the ionization boundary;

[0033] Calculation module, used to set the ionization zone boundary value d=d 0, and substitute them into the first and second onset field strength expressions respectively to calculate the first and second onset field strengths;

[0034] A determination module, used for changing the ionization zone boundary value d, recalculating the first corona onset field strength and the second corona onset field strength, until the preset accuracy requirement is met and outputting the ionization zone boundary value d, when the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement;

[0035] The output module is used to substitute the output ionization zone boundary value d into the first corona onset field strength expression to calculate the conductor corona onset field strength taking into account the influence of altitude.

[0036] In a third aspect, the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0037] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention discloses a method for calculating the conductor corona onset field strength considering the influence of altitude and a related device. Based on Morrow's ionization coefficient and electron adsorption coefficient formula, a first corona onset field strength expression considering the influence of altitude is obtained, and based on the properties of the ionization boundary, a second corona onset field strength expression is obtained. Then, the initial value d of the air pressure, humidity, temperature and ionization boundary d corresponding to the given altitude is obtained. 0 , the first corona onset field strength and the second corona onset field strength are calculated respectively. Through iterative calculation, the boundary value d of the ionization zone that meets the accuracy requirement is finally substituted into the expression of the first corona onset field strength, and the conductor corona onset field strength considering the altitude effect can be obtained. The present invention is based on the geometric structure of the wire plate electrode and can be used to determine the conductor corona onset field strength under different conductor radii, heights above the ground, and altitudes. The maximum error of the calculated positive and negative conductor corona onset field strength compared with the experimental one is no more than 1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1is a flow chart of the method of the present invention;

[0042] Figure 2 is a schematic diagram of the system of the present invention;

[0043] Figure 3 This is a schematic diagram of the wire plate electrode structure of an embodiment of the present invention;

[0044] Figure 4 A flow chart of the calculation of the conductor corona initiation field strength considering the influence of altitude according to an embodiment of the present invention;

[0045] Figure 5 The figure is a comparison chart between the calculation results and the experiment results of the embodiment of the present invention.

[0046] Figure 6 It is a schematic diagram of the computer device structure of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0054] See also Figure 1 The embodiment of the present invention discloses a method for calculating the conductor corona initiation field strength considering the influence of altitude, comprising the following steps:

[0055] S1, fit Morrow's ionization coefficient and electron adsorption coefficient formula into a cubic function, and substitute it into the ionization integral Q to obtain the first halo field strength expression considering the altitude effect;

[0056] The Morrow's ionization coefficient and electron adsorption coefficient formula are:

[0057]

[0058] Where α is the ionization coefficient; η is the electron adsorption coefficient; N is the number density of gas molecules; and E is the electric field strength.

[0059] The method for determining the ionization integral Q is: determine the corona inception voltage through experiments, then calculate the field strength distribution through the nominal electric field analytical formula, and then integrate from the surface of the conductor to the place where the reduced electric field strength is 0 to calculate lnQ.

[0060] The first expression of the dizziness field strength is:

[0061]

[0062]

[0063] Where P is the air pressure at a certain altitude; P 0 is standard atmospheric pressure; E c1is the first corona field strength considering the influence of altitude, V / m; a is the wire radius; Q is the ionization integral of corona discharge at a certain altitude, and the ionization integral Q is different at different air pressure, humidity and temperature; d is the boundary value of the ionization zone; δ is the relative air density.

[0064] S2, the second corona onset field strength expression is obtained through the properties of the ionization boundary;

[0065] The second fainting field strength expression is:

[0066]

[0067] In the formula, E c2 is the second corona field strength; h is the height of the conductor above the ground; δ is the relative air density; d is the boundary value of the ionization zone; a is the radius of the conductor.

[0068] S3, set the ionization zone boundary value d=d 0 , and substitute them into the first and second onset field strength expressions respectively to calculate the first and second onset field strengths;

[0069] Get the air pressure, humidity, temperature and wire radius corresponding to the given altitude; set the ionization zone boundary value d = d 0 , substitute into the first onset field strength expression to calculate the first onset field strength E c1 ;

[0070] The height of the conductor above the ground h, the radius of the conductor a and the boundary value of the ionization zone d = d 0 Substitute into the second onset field strength expression, and calculate the second onset field strength E c2 .

[0071] S4, when the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement, change the ionization zone boundary value d, recalculate the first corona onset field strength and the second corona onset field strength until they meet the preset accuracy requirement and output the ionization zone boundary value d;

[0072] Preferably, the preset accuracy requirement is: |E c1 -E c2 | / E c2 <0.01%. If the criterion is not met, the boundary value of the ionization zone is reassigned and iterated continuously until the accuracy criterion requirement is met.

[0073] S5, substituting the output ionization zone boundary value d into the first corona onset field strength expression, and calculating the conductor corona onset field strength considering the altitude effect.

[0074] Figure 3 It is a wire plate electrode structure. When the ionization integral Q is determined, equation (2) and equation (3) are combined, and then the E c1 =Ec2 , the ionization boundary d can be obtained, and then the corona initiation field strength can be calculated by formula (2). The calculation process of the corona initiation field strength of the wire plate electrode wire at different air pressures is as follows: Figure 4 shown.

[0075] The present invention is based on the setting of the wire-plate electrode, and utilizes the nominal electric field analytical formula of the wire-plate electrode, the ionization integral Q obtained through experiments or calculations, and Morrow's ionization coefficient and electron adsorption coefficient formula. Morrow's formula has been verified to be in good agreement with the experiment. Finally, two formulas can be obtained, and the two formulas can be solved jointly by an iterative calculation method to obtain the conductor corona initiation field strength that takes into account the influence of altitude. Among them, the method for obtaining the ionization integral Q through experiments is: the corona initiation voltage determined experimentally is used to obtain the field strength distribution through the nominal electric field analytical formula, and then the lnQ can be obtained by integrating from the conductor surface to the place where the reduced electric field strength is 0. The calculation results using the method of the present invention are compared with the experiment. See. Figure 5 , are the experimental and calculated results at 20℃ and 40% relative humidity; it can be seen that the calculated results are in good agreement with the experimental results.

[0076] See also Figure 2 The embodiment of the present invention provides a conductor onset field strength calculation system taking into account the influence of altitude, including a first onset field strength module, a second onset field strength module, a calculation module, a determination module and an output module.

[0077] Among them, the first corona onset field strength module is used to fit Morrow's ionization coefficient and electron adsorption coefficient formula into a cubic function form, and substitute it into the ionization integral Q to obtain the first corona onset field strength expression considering the altitude effect;

[0078] In this embodiment, the first fainting onset field strength expression is:

[0079]

[0080]

[0081] Where P is the air pressure at a certain altitude; P 0 is standard atmospheric pressure; E c1 is the first corona field strength considering the influence of altitude, V / m; a is the wire radius; Q is the ionization integral of corona discharge at a certain altitude, and the ionization integral Q is different at different air pressure, humidity and temperature; d is the boundary value of the ionization zone; δ is the relative air density.

[0082] The second corona onset field strength module is used to obtain the second corona onset field strength expression through the properties of the ionization boundary;

[0083] In this embodiment, the second fainting onset field strength expression is:

[0084]

[0085] In the formula, E c2 is the second corona field strength; h is the height of the conductor above the ground; δ is the relative air density; d is the boundary value of the ionization zone; a is the radius of the conductor.

[0086] Calculation module, used to set the ionization zone boundary value d=d 0 , and substitute them into the first and second onset field strength expressions respectively to calculate the first and second onset field strengths;

[0087] In this embodiment, the initial values ​​d of the pressure, humidity, temperature, and ionization boundary d corresponding to the given altitude are 0 , calculate E according to formula (2) and formula (3) respectively c1 With E c2 ;

[0088] A determination module, used for changing the ionization zone boundary value d, recalculating the first corona onset field strength and the second corona onset field strength, until the preset accuracy requirement is met and outputting the ionization zone boundary value d, when the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement;

[0089] In this embodiment, it is determined that E c1 With E c2 Whether the difference meets the accuracy requirement; if it does, the ionization boundary d is obtained, and the corona initiation field strength is calculated using formula (2). If it does not meet the requirement, the ionization zone boundary value d is changed and iterated again until the accuracy requirement is met. The accuracy requirement is: |E c1 -E c2 | / E c2 <0.01%.

[0090] The output module is used to substitute the output ionization zone boundary value d into the first corona onset field strength expression to calculate the conductor corona onset field strength taking into account the influence of altitude.

[0091] In one embodiment of the present invention, see Figure 6, a computer device is provided, the computer device includes a processor and a memory, the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of the method for calculating the field strength of the conductor initiation considering the influence of altitude.

[0092] The present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the computer device and the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for calculating the conductor corona initiation field strength considering the influence of altitude in the above-mentioned embodiment.

[0093] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0095] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating the conductor corona initiation field strength considering the influence of altitude, characterized in that: The following steps are involved: The Morrow's ionization coefficient and electron adsorption coefficient formula are fitted into a cubic function, and substituted into the ionization integral Q to obtain the first halo field strength expression considering the altitude effect. The second corona onset field strength expression is obtained through the properties of the ionization boundary; Set the ionization zone boundary value d=d0, and substitute the first corona onset field strength expression and the second corona onset field strength expression respectively to calculate the first corona onset field strength and the second corona onset field strength; When the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement, the ionization zone boundary value d is changed, and the first corona onset field strength and the second corona onset field strength are recalculated until the preset accuracy requirement is met and the ionization zone boundary value d is output; Substitute the output ionization zone boundary value d into the first corona onset field strength expression to calculate the conductor corona onset field strength taking into account the influence of altitude.

2. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1 is characterized in that: The Morrow's ionization coefficient and electron adsorption coefficient formula are: Where α is the ionization coefficient; η is the electron adsorption coefficient; N is the number density of gas molecules; and E is the electric field strength.

3. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1 is characterized in that: The method for determining the ionization integral Q is: The corona inception voltage is determined experimentally, and then the field strength distribution is calculated using the nominal electric field analytical formula. Then lnQ can be calculated by integrating from the surface of the conductor to the place where the reduced electric field strength is 0.

4. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1, characterized in that: The first onset field strength expression is: Where P is the air pressure at a certain altitude; P0 is the standard atmospheric pressure; E c1 is the first halo field strength considering the influence of altitude; a is the wire radius; Q is the ionization integral; d is the boundary value of the ionization zone; δ is the relative air density.

5. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1, characterized in that: The second fainting field strength expression is: In the formula, E c2 is the second corona field strength; h is the height of the conductor above the ground; δ is the relative air density; d is the boundary value of the ionization zone; a is the radius of the conductor.

6. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1, characterized in that: The step of setting the ionization zone boundary value d=d0 and substituting the first corona onset field strength expression and the second corona onset field strength expression into the expression respectively to calculate the first corona onset field strength and the second corona onset field strength specifically includes: Get the air pressure, humidity, temperature and wire radius corresponding to the given altitude; set the ionization zone boundary value d = d0, substitute it into the first corona onset field strength expression to calculate the first corona onset field strength E c1 ; Substitute the conductor height h, conductor radius a and ionization zone boundary value d=d0 into the second corona onset field strength expression to calculate the second corona onset field strength E c2 .

7. The method for calculating the conductor corona initiation field strength considering the influence of altitude according to claim 1, characterized in that: The preset accuracy requirement is: |E c1 -E c2 | / E c2 <0.01%.

8. A conductor corona initiation field strength calculation system considering the influence of altitude, characterized in that: include: The first halo field strength module is used to fit Morrow's ionization coefficient and electron adsorption coefficient formula into a cubic function, and substitute it into the ionization integral Q to obtain the first halo field strength expression considering the altitude effect; The second corona onset field strength module is used to obtain the second corona onset field strength expression through the properties of the ionization boundary; A calculation module is used to set the ionization zone boundary value d=d0, and substitute the first corona onset field strength expression and the second corona onset field strength expression respectively to calculate the first corona onset field strength and the second corona onset field strength; A determination module, used for changing the ionization zone boundary value d, recalculating the first corona onset field strength and the second corona onset field strength, until the preset accuracy requirement is met and outputting the ionization zone boundary value d, when the first corona onset field strength and the second corona onset field strength do not meet the preset accuracy requirement; The output module is used to substitute the output ionization zone boundary value d into the first corona onset field strength expression to calculate the conductor corona onset field strength taking into account the influence of altitude.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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