Method and system for designing size of grounding body with cage type structure outside tower pile foundation

Abstract

The invention discloses a method and system for designing the size of a tower pile foundation external cage type structure grounding body, and relates to the technical field of power system grounding. Equivalent resistance conversion is carried out according to target impact grounding resistance and design basic parameters, and corresponding equivalent power frequency grounding resistance is obtained; and based on the equivalent power frequency grounding resistance and a preset resistance contribution ratio, according to the design basic parameters, carrying out key size back calculation to obtain corresponding key structure size parameters, and according to the design basic parameters and the key structure size parameters, carrying out verification correction on the equivalent power frequency grounding resistance to obtain corresponding corrected impact grounding resistance. And optimizing the key structure size parameters by adopting the corrected impulse grounding resistance and the target impulse grounding resistance to obtain corresponding key structure size design parameters. The technical problems that according to an existing grounding body size design method, the deviation rate of target resistance is high, and the adaptability of a tower pile foundation external cage type structure grounding body is reduced are solved.

Description

Technical Field

[0001] This invention relates to the field of power system grounding technology, and in particular to a method and system for designing the dimensions of an external cage-type grounding electrode for tower pile foundations. Background Technology

[0002] As the global energy transition continues, my country's power grid construction has entered a high-speed development stage characterized by ultra-high voltage (UHV) and intelligentization. The UHV backbone grid is becoming increasingly dense, and the installed capacity of new energy power generation such as wind power and photovoltaics is experiencing explosive growth. The power grid coverage is gradually expanding into special areas such as the high soil resistivity region in the Northwest and the complex terrain region in the Southwest. As a core component for power grid lightning protection and fault current discharge, the grounding electrode's dimensions directly determine whether the impulse grounding resistance meets standards, thus affecting the safe and stable operation of the entire power system. Currently, my country's 1000kV UHV AC and ±800kV UHV DC transmission projects have achieved large-scale operation, with transmission line tower heights exceeding 100 meters. The peak lightning current that a single tower grounding device needs to withstand can reach over 50kA. According to the DL / T621-1997 standard "Grounding of AC Electrical Installations", the design requirement for impulse grounding resistance is generally lower than 10Ω. Under these extreme conditions, the cage-type grounding electrode with external support to the tower pile foundation has become the mainstream grounding form for UHV and new energy power station towers due to its advantages such as high current dissipation efficiency and good coordination with the foundation. The rationality of its size design is directly related to whether the grounding performance meets the standards. It is necessary to ensure that the impulse grounding resistance meets the requirements through precise size parameters, while also taking into account the economic efficiency of the project to avoid material waste.

[0003] However, the existing design method for the size of the external cage-type grounding electrode for tower pile foundations mainly adopts a forward trial calculation mode that first presets the size parameters and then calculates the impulse grounding resistance to verify whether it meets the standard. Due to the coupling influence of multiple factors such as soil resistivity, lightning current parameters, and structural interaction, the preset size parameters are often difficult to match the target resistance at one time. It is necessary to repeatedly adjust the key parameters and recalculate, resulting in low design efficiency and a high deviation rate from the target resistance, which reduces the adaptability of the external cage-type grounding electrode for tower pile foundations. Summary of the Invention

[0004] This invention provides a method and system for designing the dimensions of external cage-type grounding electrodes for tower and pile foundations. It solves the technical problem that existing methods for designing the dimensions of external cage-type grounding electrodes for tower and pile foundations mainly adopt a forward trial calculation mode that first presets the size parameters and then calculates the impulse grounding resistance to verify whether it meets the standard. Due to the coupling influence of multiple factors such as soil resistivity, lightning current parameters, and structural interactions, the preset size parameters are often difficult to match the target resistance at one time. It is necessary to repeatedly adjust key parameters and recalculate, resulting in low design efficiency and a high deviation rate from the target resistance, which reduces the adaptability of external cage-type grounding electrodes for tower and pile foundations.

[0005] The first aspect of this invention provides a method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, comprising:

[0006] Obtain the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation. Based on the target impulse grounding resistance and the design foundation parameters, perform equivalent resistance conversion to obtain the corresponding equivalent power frequency grounding resistance.

[0007] Based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, the key dimensions are back-calculated according to the design basic parameters to obtain the corresponding key structural dimension parameters.

[0008] The equivalent power frequency grounding resistance is verified and corrected based on the design fundamental parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0009] The key structural dimension parameters are optimized using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

[0010] Optionally, the design basis parameters include peak lightning current and soil resistivity. The step of converting the target impulse grounding resistance and the design basis parameters to obtain the corresponding equivalent power frequency grounding resistance includes:

[0011] The peak lightning current, the soil resistivity, and the preset conversion coefficient are multiplied to obtain the corresponding first multiplication value;

[0012] The arithmetic square root of the first multiplication value is multiplied by a preset impact correction coefficient to obtain the corresponding second multiplication value;

[0013] The second multiplier is added to the preset impact reference value to obtain the corresponding impact coefficient;

[0014] The impact coefficient and the target impact grounding resistance are multiplied to obtain the corresponding equivalent power frequency grounding resistance.

[0015] Optionally, the step of back-calculating key dimensions based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, according to the design basis parameters, to obtain the corresponding key structural dimension parameters, includes:

[0016] The design basic parameters and the equivalent power frequency grounding resistance are input into a preset power frequency total resistance function to obtain the corresponding first power frequency total resistance;

[0017] Based on the preset resistance contribution ratio and the preset resistance inverse calculation function, the target ring grounding electrode parallel resistance and the target vertical grounding electrode parallel resistance corresponding to the first power frequency total resistance are determined.

[0018] The preset inverse calculation function for the size of the ring grounding electrode is solved based on the parallel resistance of the target ring grounding electrode and the design basic parameters to obtain the corresponding ring grounding electrode diameter, number of ring layers, conductor equivalent diameter and ring layer spacing.

[0019] The preset vertical grounding electrode size inverse calculation function is solved based on the target vertical grounding electrode parallel resistance and the design basic parameters to obtain the corresponding vertical grounding electrode length, number of vertical electrodes and vertical grounding electrode diameter.

[0020] The diameter of the annular grounding electrode, the number of annular layers, the equivalent diameter of the conductor, the spacing between annular layers, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode are determined as key structural dimension parameters.

[0021] Optionally, the step of verifying and correcting the equivalent power frequency grounding resistance based on the design fundamental parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance includes:

[0022] The design basis parameters and the key structural dimension parameters are input into a preset spark effect function to obtain the corresponding spark correction coefficients;

[0023] The spark correction coefficient is multiplied by the equivalent power frequency grounding resistance to obtain the corresponding reference impulse grounding resistance.

[0024] By inputting the design basis parameters and the key structural dimension parameters into a preset inductance effect function, the corresponding target ring ground electrode equivalent inductance and target vertical ground electrode equivalent inductance are obtained.

[0025] The reference impulse grounding resistance is corrected based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design basis parameters to obtain the corresponding corrected impulse grounding resistance.

[0026] Optionally, the design basis parameters further include wavefront time, and the step of correcting the reference impulse grounding resistance based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design basis parameters to obtain the corresponding corrected impulse grounding resistance includes:

[0027] The equivalent inductance of the target ring grounding electrode and the equivalent inductance of the target vertical grounding electrode are summed to obtain the corresponding total inductance.

[0028] The ratio of the total inductance to the wavefront time is used to obtain the corresponding inductance-added resistance.

[0029] The inductor-added resistance and the reference impulse grounding resistance are summed to obtain the corresponding corrected impulse grounding resistance.

[0030] Optionally, the spark effect function is specifically:

[0031] ;

[0032] ;

[0033] ;

[0034] ;

[0035] ;

[0036] in, The equivalent radius of the spark channel. For soil resistivity, This represents the peak value of the lightning current. For wavefront time, For soil penetration field strength, This is the spark correction factor. The total effective current dissipation length of the grounding electrode. The minimum current dissipation radius at power frequency, The corrected equivalent divergence radius, The length of the vertical grounding electrode. The number of ring layers, The interlayer spacing is annular. The diameter of the vertical grounding electrode. The equivalent diameter of the conductor. The diameter of the ring-shaped grounding electrode.

[0037] Optionally, the inductance effect function is specifically:

[0038] ;

[0039] ;

[0040] in, The equivalent inductance of the target toroidal grounding electrode. The equivalent inductance of a single-layer ring grounding electrode is... The number of ring layers, The permeability of free space, The diameter of the ring-shaped grounding electrode. The equivalent inductance of the target vertical grounding electrode. The equivalent inductance of a single vertical grounding electrode. For vertical quantity, The diameter of the vertical grounding electrode.

[0041] Optionally, the step of optimizing the key structural dimension parameters using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters includes:

[0042] When the corrected impulse grounding resistance is greater than the target impulse grounding resistance, the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameter is adjusted based on the preset adjustment step size, and the process jumps to the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basis parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0043] When the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, the deviation between the corrected impulse grounding resistance and the target impulse grounding resistance is calculated.

[0044] When the deviation value is greater than the preset deviation threshold, the key structural dimension parameters are adjusted based on the preset adjustment strategy, and the process jumps to the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basis parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0045] When the deviation value is less than or equal to the deviation threshold, the key structural dimension parameter is determined as the key structural dimension design parameter.

[0046] The second aspect of this invention provides a system for designing the dimensions of an external cage-type grounding electrode for tower pile foundations, comprising:

[0047] The acquisition module is used to obtain the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation, and to perform equivalent resistance conversion based on the target impulse grounding resistance and the design foundation parameters to obtain the corresponding equivalent power frequency grounding resistance;

[0048] The inverse calculation module is used to perform inverse calculation of key dimensions based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, according to the design basic parameters, to obtain the corresponding key structural dimension parameters.

[0049] The correction module is used to verify and correct the equivalent power frequency grounding resistance based on the design basis parameters and the key structural dimension parameters, so as to obtain the corresponding corrected impulse grounding resistance.

[0050] The optimization module is used to optimize the key structural dimension parameters using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

[0051] The third aspect of the present invention provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the above-described method for designing the dimensions of the grounding electrode of the external cage structure for tower pile foundation.

[0052] As can be seen from the above technical solutions, the present invention has the following advantages:

[0053] This invention obtains the design foundation parameters and target impulse grounding resistance of the external cage-type grounding electrode for tower and pile foundations. Based on the target impulse grounding resistance and the design foundation parameters, it performs equivalent resistance conversion to obtain the corresponding equivalent power frequency grounding resistance. Based on the equivalent power frequency grounding resistance and a preset resistance contribution ratio, it performs back-calculation of key dimensions according to the design foundation parameters to obtain the corresponding key structural dimension parameters. It then verifies and corrects the equivalent power frequency grounding resistance based on the design foundation parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. Finally, it optimizes the key structural dimension parameters using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This overcomes the technical problem of existing grounding electrode size design methods, which mainly use a forward trial calculation mode of first preset dimension parameters and then calculate the impulse grounding resistance to verify compliance. However, this method has a high deviation rate of the target resistance, reducing the adaptability of the external cage-type grounding electrode for tower and pile foundations. Compared with traditional grounding electrode size design methods, this invention uses the equivalent power frequency grounding resistance and a preset resistance contribution ratio to back-calculate key dimensions based on the design foundation parameters, thereby obtaining the corresponding key structural dimension parameters. Then, the key structural dimension parameters are iteratively optimized using the design foundation parameters, the equivalent power frequency grounding resistance, and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This improves design efficiency, reduces the deviation rate of the target resistance, and enhances the adaptability of the external cage-type grounding electrode for tower pile foundations. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a flowchart illustrating the steps of a method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 1 of the present invention.

[0056] Figure 2 This is a flowchart illustrating the steps of a method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 2 of the present invention.

[0057] Figure 3 This is a schematic diagram of the structure of the external cage-type grounding electrode model for the tower pile foundation provided in Embodiment 2 of the present invention;

[0058] Figure 4 This is a structural block diagram of a system for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 3 of the present invention.

[0059] Figure 5 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention. Detailed Implementation

[0060] This invention provides a method and system for designing the dimensions of an external cage-type grounding electrode for tower and pile foundations. It addresses the technical problem that existing methods for designing external cage-type grounding electrodes for tower and pile foundations primarily employ a forward calculation model that first presets dimensional parameters and then calculates the impulse grounding resistance to verify compliance. This model is affected by multiple factors such as soil resistivity, lightning current parameters, and structural interactions, making it difficult to match the preset dimensional parameters to the target resistance on the first attempt. This necessitates repeated adjustments to key parameters and recalculation, resulting in low design efficiency and a high deviation rate from the target resistance, thus reducing the adaptability of the external cage-type grounding electrode for tower and pile foundations.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that in the optional embodiments of the present invention, the object information and other related data involved require the permission or consent of the object when the embodiments of the present invention are applied to specific products or technologies, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. That is to say, if the embodiments of the present invention involve data related to the object, it needs to be obtained with the authorization and consent of the object, the authorization and consent of the relevant departments, and in compliance with the relevant laws, regulations, and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the consent of the individual. If sensitive information is involved, the separate consent of the information subject is required, and the embodiments also need to be implemented with the authorization and consent of the object.

[0062] Please see Figure 1 , Figure 1 This is a flowchart illustrating the steps of a method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 1 of the present invention.

[0063] This invention provides a method for designing the dimensions of an external cage-type grounding electrode for tower pile foundations, comprising:

[0064] Step 101: Obtain the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation. Based on the target impulse grounding resistance and the design foundation parameters, perform equivalent resistance conversion to obtain the corresponding equivalent power frequency grounding resistance.

[0065] Design basic parameters refer to the core input parameters required for grounding electrode size design, including but not limited to peak lightning current, soil resistivity, wavefront time, number of tower piles, pile length, grounding electrode material, concrete protective layer thickness (only used to constrain cage-pile installation spacing), and cage-pile installation spacing.

[0066] Target impulse grounding resistance refers to the grounding resistance limit that the grounding electrode should reach under impulse conditions during a lightning strike, as determined by the tower voltage level, lightning protection zone category, and relevant design standards.

[0067] In this embodiment of the invention, the design foundation parameters and target impulse grounding resistance of the external cage-type grounding electrode of the tower pile foundation are obtained. The design foundation parameters are input into a preset impulse coefficient function to obtain the corresponding impulse coefficient. The impulse coefficient and the target impulse grounding resistance are input into a preset equivalent power frequency grounding resistance function to obtain the corresponding equivalent power frequency grounding resistance.

[0068] It should be noted that the impact coefficient function is as follows:

[0069]

[0070] in, The impact coefficient, For soil resistivity, This represents the peak value of the lightning current.

[0071] It should be noted that the equivalent power frequency grounding resistance function is as follows:

[0072]

[0073] in, This is the equivalent power frequency grounding resistance. The target impulse grounding resistance.

[0074] Step 102: Based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, perform back-calculation of key dimensions according to the design basic parameters to obtain the corresponding key structural dimension parameters.

[0075] The resistance contribution ratio refers to the proportion of the total resistance borne by the two types of grounding electrode components, which are pre-set according to the horizontal and vertical current dissipation efficiency characteristics of the ring grounding electrode and the vertical grounding electrode.

[0076] Key structural dimension parameters refer to the core dimension parameters that directly affect the grounding performance and economy of the grounding electrode, including the diameter of the ring grounding electrode, the number of ring layers, the equivalent diameter of the conductor, the ring layer spacing, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode.

[0077] In this embodiment of the invention, the number of tower piles and the equivalent power frequency grounding resistance, which are the design foundation parameters, are input into a preset power frequency total resistance function to obtain the corresponding first power frequency total resistance. Based on a preset resistance contribution ratio and a preset resistance inverse calculation function, the target ring grounding electrode parallel resistance and the target vertical grounding electrode parallel resistance corresponding to the first power frequency total resistance are determined. The preset ring grounding electrode size inverse calculation function is solved based on the target ring grounding electrode parallel resistance and the design foundation parameters to obtain the corresponding ring grounding electrode diameter, number of ring layers, equivalent conductor diameter, and ring layer spacing. The preset vertical grounding electrode size inverse calculation function is solved based on the target vertical grounding electrode parallel resistance and the design foundation parameters to obtain the corresponding vertical grounding electrode length, number of vertical electrodes, and vertical grounding electrode diameter.

[0078] Step 103: Verify and correct the equivalent power frequency grounding resistance based on the design basic parameters and key structural dimensions to obtain the corresponding corrected impulse grounding resistance.

[0079] In this embodiment of the invention, the design fundamental parameters and key structural dimension parameters are input into a preset spark effect function to obtain the corresponding spark correction coefficient. The spark correction coefficient is multiplied by the equivalent power frequency grounding resistance to obtain the corresponding reference impulse grounding resistance. The design fundamental parameters and key structural dimension parameters are input into a preset inductance effect function to obtain the corresponding target ring grounding electrode equivalent inductance and target vertical grounding electrode equivalent inductance. The target ring grounding electrode equivalent inductance, target vertical grounding electrode equivalent inductance, design fundamental parameters, and reference impulse grounding resistance are input into a preset correction function to obtain the corresponding corrected impulse grounding resistance.

[0080] It should be noted that the correction function is as follows:

[0081]

[0082] in, For the total inductance, The equivalent inductance of the target toroidal grounding electrode. The equivalent inductance of the target vertical grounding electrode. Add a resistor to the inductor. For wavefront time, As the reference impulse grounding resistance, To correct the impulse grounding resistance.

[0083] Step 104: Optimize the key structural dimension parameters by using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

[0084] In this embodiment of the invention, it is determined whether the corrected impulse grounding resistance is greater than the target impulse grounding resistance. When the corrected impulse grounding resistance is greater than the target impulse grounding resistance, the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameter is adjusted based on a preset adjustment step size, and the process jumps to step 103. When the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, the deviation value between the corrected impulse grounding resistance and the target impulse grounding resistance is calculated. When the deviation value is greater than a preset deviation threshold, the key structural dimension parameter is adjusted based on a preset adjustment strategy, and the process jumps to step 103. When the deviation value is less than or equal to the deviation threshold, the key structural dimension parameter is determined as the key structural dimension design parameter.

[0085] In this embodiment of the invention, the design foundation parameters and target impulse grounding resistance of the external cage-type grounding electrode for tower pile foundations are obtained. Based on the target impulse grounding resistance and the design foundation parameters, equivalent resistance conversion is performed to obtain the corresponding equivalent power frequency grounding resistance. Based on the equivalent power frequency grounding resistance and a preset resistance contribution ratio, key dimensions are back-calculated according to the design foundation parameters to obtain the corresponding key structural dimension parameters. The equivalent power frequency grounding resistance is then verified and corrected based on the design foundation parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. Finally, the key structural dimension parameters are optimized using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This overcomes the technical problem of existing grounding electrode size design methods, which mainly use a forward trial calculation mode of first preset dimension parameters and then calculate the impulse grounding resistance to verify compliance, but which has a high deviation rate of the target resistance and reduces the adaptability of the external cage-type grounding electrode for tower pile foundations. Compared with traditional grounding electrode size design methods, this invention uses the equivalent power frequency grounding resistance and a preset resistance contribution ratio to back-calculate key dimensions based on the design foundation parameters, thereby obtaining the corresponding key structural dimension parameters. Then, the key structural dimension parameters are iteratively optimized using the design foundation parameters, the equivalent power frequency grounding resistance, and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This improves design efficiency, reduces the deviation rate of the target resistance, and enhances the adaptability of the external cage-type grounding electrode for tower pile foundations.

[0086] Please see Figure 2 , Figure 2 This is a flowchart illustrating the steps of a method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 2 of the present invention.

[0087] This invention provides a method for designing the dimensions of an external cage-type grounding electrode for tower pile foundations, comprising:

[0088] Step 201: Obtain the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation. Based on the target impulse grounding resistance and the design foundation parameters, perform equivalent resistance conversion to obtain the corresponding equivalent power frequency grounding resistance.

[0089] Furthermore, the design of basic parameters includes peak lightning current and soil resistivity. Step 201 includes the following sub-steps:

[0090] S11. Multiply the peak lightning current, soil resistivity, and preset conversion coefficient to obtain the corresponding first multiplication value.

[0091] The conversion factor refers to an empirical coefficient obtained by fitting a large amount of measured engineering data with theoretical analysis. It is used to quantify the synergistic effect of peak lightning current and soil resistivity on the impact coefficient, and is usually 10. -3 .

[0092] In this embodiment of the invention, the multiplication value between the peak lightning current, soil resistivity, and a preset conversion factor is calculated to obtain the corresponding first multiplication value.

[0093] S12. Multiply the arithmetic square root of the first multiplier with the preset impact correction coefficient to obtain the corresponding second multiplier.

[0094] The impact correction factor is an empirical coefficient determined based on a large amount of engineering measurement data and theoretical analysis. It is used to adapt to parameter deviations in different soil types, lightning intensity, and other scenarios, and is usually 0.08.

[0095] In this embodiment of the invention, the arithmetic square root of the first multiplier is calculated and the multiplication factor is a preset impact correction coefficient to obtain the corresponding second multiplier.

[0096] S13. Add the second multiplier value to the preset impact reference value to obtain the corresponding impact coefficient.

[0097] The impulse reference value refers to the reference parameter determined based on the power system grounding design standard (such as DL / T 621-1997 "Grounding of AC Electrical Installations") and a large amount of engineering measurement data, and is usually taken as 1.

[0098] In this embodiment of the invention, the sum between the second multiplier and the preset impact reference value is calculated to obtain the corresponding impact coefficient.

[0099] S14. Multiply the impulse coefficient and the target impulse grounding resistance to obtain the corresponding equivalent power frequency grounding resistance.

[0100] In this embodiment of the invention, the multiplication between the impulse coefficient and the target impulse grounding resistance is calculated to obtain the corresponding equivalent power frequency grounding resistance.

[0101] Step 202: Input the design basic parameters and equivalent power frequency grounding resistance into the preset power frequency total resistance function to obtain the corresponding first power frequency total resistance.

[0102] The first power frequency total resistance refers to the power frequency total resistance of a single set of external cage grounding electrodes.

[0103] In this embodiment of the invention, the first power frequency total resistance is determined based on a preset power frequency total resistance function, according to the design basic parameters and the equivalent power frequency grounding resistance.

[0104] It should be noted that the total resistance function at power frequency is specifically as follows:

[0105]

[0106] in, This is the equivalent power frequency grounding resistance. The first power frequency total resistance, This refers to the number of pole and tower pile foundations.

[0107] Step 203: Based on the preset resistance contribution ratio and the preset resistance inverse calculation function, determine the target ring grounding electrode parallel resistance and the target vertical grounding electrode parallel resistance corresponding to the first power frequency total resistance.

[0108] The target ring grounding electrode parallel resistance refers to the parallel resistance of the m-layer ring grounding electrodes.

[0109] The target vertical grounding electrode parallel resistance refers to the parallel resistance of k vertical grounding electrodes.

[0110] In this embodiment of the invention, the preset resistance inverse calculation function is solved based on the preset resistance contribution ratio (i.e., the ratio between the target ring ground electrode parallel resistance and the target vertical ground electrode parallel resistance) and the first power frequency total resistance to obtain the corresponding target ring ground electrode parallel resistance and target vertical ground electrode parallel resistance.

[0111] It should be noted that the inverse resistance calculation function is as follows:

[0112]

[0113] in, The first power frequency total resistance, A parallel resistor is connected to the target toroidal grounding electrode. A parallel resistor is connected to the target vertical grounding electrode.

[0114] Step 204: Solve the preset inverse calculation function for the size of the ring grounding electrode based on the parallel resistance of the target ring grounding electrode and the design basic parameters to obtain the corresponding ring grounding electrode diameter, number of ring layers, conductor equivalent diameter and ring layer spacing.

[0115] In this embodiment of the invention, when the grounding electrode material of the design basic parameters is round steel, the diameter of the round steel is used as the equivalent diameter of the conductor. When the grounding electrode material of the design basic parameters is flat steel, the equivalent diameter of the conductor is (2 * flat steel width) / π. The target ring grounding electrode parallel resistance, the design basic parameters, and the equivalent diameter of the conductor are input into a preset ring grounding electrode size inverse calculation function to obtain the corresponding ring grounding electrode diameter, number of ring layers, and ring layer spacing.

[0116] It should be noted that the specific function for calculating the size of a ring-shaped grounding electrode is as follows:

[0117]

[0118]

[0119]

[0120]

[0121] in, It is a single-ring grounding electrode power frequency resistor. The number of ring layers, For soil resistivity, The diameter of the ring-shaped grounding electrode. The equivalent diameter of the conductor. The thickness of the concrete protective layer. The diameter of the pile foundation. The minimum safe distance between the cage and the pile. It represents the annular interlayer spacing.

[0122] Step 205: Solve the preset vertical grounding electrode size inverse calculation function based on the target vertical grounding electrode parallel resistance and design basic parameters to obtain the corresponding vertical grounding electrode length, number of vertical electrodes and vertical grounding electrode diameter.

[0123] In this embodiment of the invention, based on the current dissipation theory of vertical grounding electrodes and the maximum depth requirements of engineering construction, the target vertical grounding electrode parallel resistance and design foundation parameters are input into a preset vertical grounding electrode size inverse calculation function for solution (that is, the initial range of the vertical grounding electrode diameter is determined according to the conductor selection (it must meet the current carrying capacity and corrosion prevention requirements), and then the vertical grounding electrode length, vertical number and vertical grounding electrode diameter are obtained by back-calculating according to the initial range, the target vertical grounding electrode parallel resistance, the design foundation parameters and the vertical grounding electrode size inverse calculation function).

[0124] It should be noted that the vertical grounding electrode current diffusion theory guides the theoretical system for the conduction and diffusion of current into deep soil by vertical grounding electrodes. The maximum depth requirement for engineering construction refers to the maximum depth limit that vertical grounding electrodes can be buried, determined based on the capabilities of construction equipment, geological conditions, and safety regulations.

[0125] It should be noted that the specific function for calculating the vertical grounding electrode size is as follows:

[0126]

[0127]

[0128]

[0129] in, This is a single vertical grounding electrode power frequency resistor. For soil resistivity, The length of the vertical grounding electrode. The diameter of the vertical grounding electrode. A parallel resistor is connected to the target vertical grounding electrode. For vertical quantities.

[0130] Step 206: Determine the diameter of the ring grounding electrode, the number of ring layers, the equivalent diameter of the conductor, the ring layer spacing, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode as key structural dimension parameters.

[0131] In this embodiment of the invention, the diameter of the annular grounding electrode, the number of annular layers, the equivalent diameter of the conductor, the spacing between annular layers, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode are used as key structural dimension parameters.

[0132] Step 207: Verify and correct the equivalent power frequency grounding resistance based on the design basic parameters and key structural dimensions to obtain the corresponding corrected impulse grounding resistance.

[0133] Furthermore, step 207 includes the following sub-steps:

[0134] S21. Input the design basic parameters and key structural dimension parameters into the preset spark effect function to obtain the corresponding spark correction coefficients.

[0135] In this embodiment of the invention, the design fundamental parameters and key structural dimension parameters are input into a preset spark effect function to obtain the corresponding spark correction coefficient. The spark effect function incorporates soil breakdown theory and current dissipation radius correction logic. First, the equivalent radius of the spark channel is calculated using the peak lightning current, wavefront time, and soil breakdown field strength. Then, the total effective current dissipation length of the grounding electrode and the minimum current dissipation radius at power frequency are derived by combining the key structural dimension parameters, thereby obtaining the corrected equivalent current dissipation radius. Finally, the corresponding spark correction coefficient is calculated using the quantification relationship of the above parameters.

[0136] It should be noted that the spark effect function is specifically as follows:

[0137] ;

[0138] ;

[0139] ;

[0140] ;

[0141] ;

[0142] in, The equivalent radius of the spark channel. For soil resistivity, This represents the peak value of the lightning current. For wavefront time, For soil penetration field strength, This is the spark correction factor. The total effective current dissipation length of the grounding electrode. The minimum current dissipation radius at power frequency, The corrected equivalent divergence radius, The length of the vertical grounding electrode. The number of ring layers, The interlayer spacing is annular. The diameter of the vertical grounding electrode. The equivalent diameter of the conductor. The diameter of the ring-shaped grounding electrode.

[0143] S22. Multiply the spark correction factor by the equivalent power frequency grounding resistance to obtain the corresponding reference impulse grounding resistance.

[0144] In this embodiment of the invention, the multiplication between the spark correction factor and the equivalent power frequency grounding resistance is calculated to obtain the corresponding reference impulse grounding resistance.

[0145] S23. Input the design basic parameters and key structural dimension parameters into the preset inductance effect function to obtain the corresponding target ring ground electrode equivalent inductance and target vertical ground electrode equivalent inductance.

[0146] In this embodiment of the invention, the design basic parameters and key structural dimension parameters are input into a preset inductance effect function to obtain the corresponding equivalent inductance of the target ring ground electrode and the equivalent inductance of the target vertical ground electrode. The inductance effect function is embedded in the inductance calculation model of the ring and vertical ground electrodes. The equivalent inductance of a single-layer ring ground electrode is calculated based on the arrangement characteristics (number of layers, diameter, etc.) of the multi-layer ring ground electrode, and then combined with the number of ring layers to obtain the equivalent inductance of the target ring ground electrode. Simultaneously, the equivalent inductance of a single vertical ground electrode is calculated based on the distribution pattern (number, length, diameter, etc.) of multiple vertical ground electrodes, and combined with the number of vertical electrodes to obtain the equivalent inductance of the target vertical ground electrode.

[0147] It should be noted that the inductance effect function is specifically as follows:

[0148] ;

[0149] ;

[0150] in, The equivalent inductance of the target toroidal grounding electrode. The equivalent inductance of a single-layer ring grounding electrode is... The number of ring layers, The permeability of free space, The diameter of the ring-shaped grounding electrode. The equivalent inductance of the target vertical grounding electrode. The equivalent inductance of a single vertical grounding electrode. For vertical quantity, The diameter of the vertical grounding electrode.

[0151] S24. Based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design foundation parameters, the reference impulse grounding resistance is corrected to obtain the corresponding corrected impulse grounding resistance.

[0152] Furthermore, the design fundamental parameters also include wavefront time, and S24 includes the following sub-steps:

[0153] S241. Add the equivalent inductance of the target ring ground electrode and the equivalent inductance of the target vertical ground electrode to obtain the corresponding total inductance.

[0154] In this embodiment of the invention, the sum of the equivalent inductance of the target ring ground electrode and the equivalent inductance of the target vertical ground electrode is calculated to obtain the corresponding total inductance.

[0155] S242. The ratio of the total inductance to the wavefront time is processed to obtain the corresponding inductance-added resistance.

[0156] In this embodiment of the invention, the ratio between the total inductance and the wavefront time is calculated to obtain the corresponding inductance-added resistance.

[0157] S243. The inductor additional resistance and the reference impulse grounding resistance are summed to obtain the corresponding corrected impulse grounding resistance.

[0158] In this embodiment of the invention, the sum of the inductor's additional resistance and the reference impulse grounding resistance is calculated to obtain the corresponding corrected impulse grounding resistance.

[0159] Step 208: Optimize the key structural dimension parameters by using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

[0160] Furthermore, step 208 includes the following sub-steps:

[0161] S31. When the corrected impulse grounding resistance is greater than the target impulse grounding resistance, the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameter is adjusted based on the preset adjustment step size, and the process jumps to execute the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basic parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0162] The adjustment step size refers to the pre-set structural dimension adjustment ratio (5%~10%), which is used to control the magnitude of each dimension adjustment.

[0163] In this embodiment of the invention, when the corrected impulse grounding resistance is greater than the target impulse grounding resistance, the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameters are adjusted based on the preset adjustment step size, and the process jumps to step 207.

[0164] It is worth mentioning that during the adjustment process, priority should be given to adjusting the length of the vertical grounding electrode, as it has a more direct effect on improving the current dissipation efficiency in deep soil. By increasing the length of the vertical grounding electrode by the adjustment step size, the current dissipation path to deeper underground layers can be effectively extended, reducing grounding resistance. If increasing the length of the vertical grounding electrode cannot meet the requirements due to the maximum depth limitation of the project construction, the diameter of the ring grounding electrode should be increased by the same adjustment step size to expand the horizontal current dissipation range and enhance the horizontal current dissipation capacity.

[0165] S32. When the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, calculate the deviation between the corrected impulse grounding resistance and the target impulse grounding resistance.

[0166] In this embodiment of the invention, when the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, the corrected impulse grounding resistance and the target impulse grounding resistance are input into a preset deviation function to obtain the corresponding deviation value.

[0167] It should be noted that the deviation function is as follows:

[0168]

[0169] S33. When the deviation value is greater than the preset deviation threshold, the key structural dimension parameters are adjusted based on the preset adjustment strategy, and the process jumps to the step of verifying and correcting the equivalent power frequency grounding resistance using the design basic parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0170] Deviation threshold refers to the upper limit of allowable deviation preset based on the accuracy requirements of engineering design, and is usually set to 10%.

[0171] In this embodiment of the invention, when the deviation value is greater than 10%, the key structural dimension parameters are adjusted based on the preset adjustment strategy (i.e., the number of ring layers or vertical layers is reduced first, and then the length of the vertical grounding electrode and the diameter of the ring grounding electrode are finely adjusted), and the process jumps to step 207.

[0172] It should be noted that the priority adjustment rules for optimizing size parameters and reducing material usage are based on the core logic of "first reducing the quantity / number of layers, then fine-tuning the size".

[0173] S34. When the deviation value is less than or equal to the deviation threshold, the key structural dimension parameter is determined as the key structural dimension design parameter.

[0174] In this embodiment of the invention, when the deviation value is less than or equal to 10%, the key structural dimension parameter is determined as the key structural dimension design parameter.

[0175] It is worth mentioning that, see Figure 3 As shown, the external cage-type grounding structure of the tower pile foundation is constructed using key structural dimension design parameters and design foundation parameters.

[0176] In this embodiment of the invention, the design foundation parameters and target impulse grounding resistance of the external cage-type grounding electrode for tower pile foundations are obtained. Based on the target impulse grounding resistance and the design foundation parameters, equivalent resistance conversion is performed to obtain the corresponding equivalent power frequency grounding resistance. Based on the equivalent power frequency grounding resistance and a preset resistance contribution ratio, key dimensions are back-calculated according to the design foundation parameters to obtain the corresponding key structural dimension parameters. The equivalent power frequency grounding resistance is then verified and corrected based on the design foundation parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. Finally, the key structural dimension parameters are optimized using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This overcomes the technical problem of existing grounding electrode size design methods, which mainly use a forward trial calculation mode of first preset dimension parameters and then calculate the impulse grounding resistance to verify compliance, but which has a high deviation rate of the target resistance and reduces the adaptability of the external cage-type grounding electrode for tower pile foundations. Compared with traditional grounding electrode size design methods, this invention uses the equivalent power frequency grounding resistance and a preset resistance contribution ratio to back-calculate key dimensions based on the design foundation parameters, thereby obtaining the corresponding key structural dimension parameters. Then, the key structural dimension parameters are iteratively optimized using the design foundation parameters, the equivalent power frequency grounding resistance, and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters. This improves design efficiency, reduces the deviation rate of the target resistance, and enhances the adaptability of the external cage-type grounding electrode for tower pile foundations.

[0177] Please see Figure 4 , Figure 4 This is a structural block diagram of a system for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, as provided in Embodiment 3 of the present invention.

[0178] This invention provides a system for designing the dimensions of an external cage-type grounding electrode for tower pile foundations, comprising:

[0179] The acquisition module 301 is used to acquire the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation, and to perform equivalent resistance conversion based on the target impulse grounding resistance and the design foundation parameters to obtain the corresponding equivalent power frequency grounding resistance.

[0180] The inverse calculation module 302 is used to perform inverse calculation of key dimensions based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, according to the design basic parameters, to obtain the corresponding key structural dimension parameters.

[0181] The correction module 303 is used to verify and correct the equivalent power frequency grounding resistance based on the design basic parameters and key structural dimension parameters, so as to obtain the corresponding corrected impulse grounding resistance.

[0182] The optimization module 304 is used to optimize the key structural dimension parameters by using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

[0183] Furthermore, the design of basic parameters includes peak lightning current and soil resistivity. The acquisition module 301 includes:

[0184] The first multiplication submodule is used to multiply the peak lightning current, soil resistivity and preset conversion coefficient to obtain the corresponding first multiplication value.

[0185] The second multiplication submodule is used to multiply the arithmetic square root of the first multiplication value with a preset impact correction coefficient to obtain the corresponding second multiplication value.

[0186] The first summation submodule is used to sum the second multiplier with the preset impact reference value to obtain the corresponding impact coefficient;

[0187] The equivalent power frequency grounding resistance submodule is used to multiply the impulse coefficient and the target impulse grounding resistance to obtain the corresponding equivalent power frequency grounding resistance.

[0188] Furthermore, the inverse calculation module 302 includes:

[0189] The power frequency total resistance submodule is used to input the design basic parameters and the equivalent power frequency grounding resistance into a preset power frequency total resistance function to obtain the corresponding first power frequency total resistance.

[0190] The resistance inverse calculation submodule is used to determine the target ring grounding electrode parallel resistance and the target vertical grounding electrode parallel resistance corresponding to the first power frequency total resistance based on the preset resistance contribution ratio and the preset resistance inverse calculation function.

[0191] The ring grounding electrode size inverse calculation submodule is used to solve the preset ring grounding electrode size inverse calculation function based on the target ring grounding electrode parallel resistance and design basic parameters, and obtain the corresponding ring grounding electrode diameter, number of ring layers, conductor equivalent diameter and ring layer spacing.

[0192] The vertical grounding electrode size inverse calculation submodule is used to solve the preset vertical grounding electrode size inverse calculation function based on the target vertical grounding electrode parallel resistance and design basic parameters, so as to obtain the corresponding vertical grounding electrode length, number of vertical electrodes and vertical grounding electrode diameter.

[0193] Select a submodule to determine the key structural dimension parameters such as the diameter of the ring grounding electrode, the number of ring layers, the equivalent diameter of the conductor, the ring layer spacing, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode.

[0194] Furthermore, the correction module 303 includes:

[0195] The spark effect submodule is used to input the basic design parameters and key structural dimension parameters into a preset spark effect function to obtain the corresponding spark correction coefficients;

[0196] The spark correction factor is multiplied by the equivalent power frequency grounding resistance to obtain the corresponding reference impulse grounding resistance.

[0197] The inductance effect submodule is used to input the basic design parameters and key structural dimension parameters into the preset inductance effect function to obtain the corresponding target ring ground electrode equivalent inductance and target vertical ground electrode equivalent inductance.

[0198] The correction submodule is used to correct the reference impulse grounding resistance based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design basic parameters, so as to obtain the corresponding corrected impulse grounding resistance.

[0199] Furthermore, the design fundamental parameters also include wavefront time and a correction submodule, including:

[0200] The first summing unit is used to sum the equivalent inductance of the target ring ground electrode and the equivalent inductance of the target vertical ground electrode to obtain the corresponding total inductance.

[0201] The ratio unit is used to process the ratio of the total inductance to the wavefront time to obtain the corresponding inductance-added resistance;

[0202] The second summing unit is used to sum the inductor's additional resistance and the reference impulse grounding resistance to obtain the corresponding corrected impulse grounding resistance.

[0203] Furthermore, the spark effect function is specifically as follows:

[0204] ;

[0205] ;

[0206] ;

[0207] ;

[0208] ;

[0209] in, The equivalent radius of the spark channel. For soil resistivity, This represents the peak value of the lightning current. For wavefront time, For soil penetration field strength, This is the spark correction factor. The total effective current dissipation length of the grounding electrode. The minimum current dissipation radius at power frequency, The corrected equivalent divergence radius, The length of the vertical grounding electrode. The number of ring layers, The interlayer spacing is annular. The diameter of the vertical grounding electrode. The equivalent diameter of the conductor. The diameter of the ring-shaped grounding electrode.

[0210] Furthermore, the inductance effect function is specifically as follows:

[0211] ;

[0212] ;

[0213] in, The equivalent inductance of the target toroidal grounding electrode. The equivalent inductance of a single-layer ring grounding electrode is... The number of ring layers, The permeability of free space, The diameter of the ring-shaped grounding electrode. The equivalent inductance of the target vertical grounding electrode. The equivalent inductance of a single vertical grounding electrode. For vertical quantity, The diameter of the vertical grounding electrode.

[0214] Furthermore, module 304 is optimized, including:

[0215] The first optimization submodule is used to adjust the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameters based on the preset adjustment step size when the corrected impulse grounding resistance is greater than the target impulse grounding resistance, and then jump to execute the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basic parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0216] When the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, the deviation between the corrected impulse grounding resistance and the target impulse grounding resistance is calculated.

[0217] The second optimization submodule is used to adjust the key structural dimension parameters based on the preset adjustment strategy when the deviation value is greater than the preset deviation threshold, and then jump to execute the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basic parameters and key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance.

[0218] When the deviation value is less than or equal to the deviation threshold, the critical structural dimension parameter is determined as the critical structural dimension design parameter.

[0219] Please see Figure 5 , Figure 5 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention.

[0220] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402. The memory 401 stores a computer program. When the computer program is executed by the processor 402, the processor 402 executes the method for designing the size of the grounding electrode of the external cage structure of the tower pile foundation as described in any of the above embodiments.

[0221] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for performing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When these codes are run by a computing device, the computing device causes the device to perform the various steps in the design method for the dimensions of the grounding electrode of the external cage structure for tower pile foundations described above.

[0222] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0223] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0224] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0225] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0226] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0227] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing the dimensions of an external cage-type grounding electrode for a tower pile foundation, characterized in that, include: Obtain the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation. Based on the target impulse grounding resistance and the design foundation parameters, perform equivalent resistance conversion to obtain the corresponding equivalent power frequency grounding resistance. Based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, the key dimensions are back-calculated according to the design basic parameters to obtain the corresponding key structural dimension parameters. The equivalent power frequency grounding resistance is verified and corrected based on the design fundamental parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. The key structural dimension parameters are optimized using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

2. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 1, characterized in that, The design basis parameters include peak lightning current and soil resistivity. The step of converting the target impulse grounding resistance and the design basis parameters into an equivalent resistance to obtain the corresponding equivalent power frequency grounding resistance includes: The peak lightning current, the soil resistivity, and the preset conversion coefficient are multiplied to obtain the corresponding first multiplication value; The arithmetic square root of the first multiplication value is multiplied by a preset impact correction coefficient to obtain the corresponding second multiplication value; The second multiplier is added to the preset impact reference value to obtain the corresponding impact coefficient; The impact coefficient and the target impact grounding resistance are multiplied to obtain the corresponding equivalent power frequency grounding resistance.

3. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 1, characterized in that, The step of back-calculating key structural dimensions based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, according to the design basis parameters, to obtain the corresponding key structural dimension parameters includes: The design basic parameters and the equivalent power frequency grounding resistance are input into a preset power frequency total resistance function to obtain the corresponding first power frequency total resistance; Based on the preset resistance contribution ratio and the preset resistance inverse calculation function, the target ring grounding electrode parallel resistance and the target vertical grounding electrode parallel resistance corresponding to the first power frequency total resistance are determined. The preset inverse calculation function for the size of the ring grounding electrode is solved based on the parallel resistance of the target ring grounding electrode and the design basic parameters to obtain the corresponding ring grounding electrode diameter, number of ring layers, conductor equivalent diameter and ring layer spacing. The preset vertical grounding electrode size inverse calculation function is solved based on the target vertical grounding electrode parallel resistance and the design basic parameters to obtain the corresponding vertical grounding electrode length, number of vertical electrodes and vertical grounding electrode diameter. The diameter of the annular grounding electrode, the number of annular layers, the equivalent diameter of the conductor, the spacing between annular layers, the length of the vertical grounding electrode, the number of vertical electrodes, and the diameter of the vertical grounding electrode are determined as key structural dimension parameters.

4. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 1, characterized in that, The step of verifying and correcting the equivalent power frequency grounding resistance based on the design fundamental parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance includes: The design basis parameters and the key structural dimension parameters are input into a preset spark effect function to obtain the corresponding spark correction coefficients; The spark correction coefficient is multiplied by the equivalent power frequency grounding resistance to obtain the corresponding reference impulse grounding resistance. By inputting the design basis parameters and the key structural dimension parameters into a preset inductance effect function, the corresponding target ring ground electrode equivalent inductance and target vertical ground electrode equivalent inductance are obtained. The reference impulse grounding resistance is corrected based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design basis parameters to obtain the corresponding corrected impulse grounding resistance.

5. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 4, characterized in that, The design basis parameters also include wavefront time. The step of correcting the reference impulse grounding resistance based on the equivalent inductance of the target ring grounding electrode, the equivalent inductance of the target vertical grounding electrode, and the design basis parameters to obtain the corresponding corrected impulse grounding resistance includes: The equivalent inductance of the target ring grounding electrode and the equivalent inductance of the target vertical grounding electrode are summed to obtain the corresponding total inductance. The ratio of the total inductance to the wavefront time is used to obtain the corresponding inductance-added resistance. The inductor-added resistance and the reference impulse grounding resistance are summed to obtain the corresponding corrected impulse grounding resistance.

6. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 4, characterized in that, The spark effect function is specifically as follows: ； ； ； ； ； in, The equivalent radius of the spark channel. For soil resistivity, This represents the peak value of the lightning current. For wavefront time, For soil penetration field strength, This is the spark correction factor. The total effective current dissipation length of the grounding electrode. The minimum current dissipation radius at power frequency, The corrected equivalent divergence radius, The length of the vertical grounding electrode. The number of ring layers, The interlayer spacing is annular. The diameter of the vertical grounding electrode. The equivalent diameter of the conductor. The diameter of the ring-shaped grounding electrode.

7. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 4, characterized in that, The inductance effect function is specifically as follows: ； ； in, The equivalent inductance of the target toroidal grounding electrode. The equivalent inductance of a single-layer ring grounding electrode is... The number of ring layers, The permeability of free space, The diameter of the ring-shaped grounding electrode. The equivalent inductance of the target vertical grounding electrode. The equivalent inductance of a single vertical grounding electrode. For vertical quantity, The diameter of the vertical grounding electrode.

8. The method for designing the dimensions of the grounding electrode for the external cage structure of the tower pile foundation according to claim 1, characterized in that, The step of optimizing the key structural dimension parameters using the modified impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters includes: When the corrected impulse grounding resistance is greater than the target impulse grounding resistance, the vertical grounding electrode length or the ring grounding electrode diameter of the key structural dimension parameter is adjusted based on the preset adjustment step size, and the process jumps to the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basis parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. When the corrected impulse grounding resistance is less than or equal to the target impulse grounding resistance, the deviation between the corrected impulse grounding resistance and the target impulse grounding resistance is calculated. When the deviation value is greater than the preset deviation threshold, the key structural dimension parameters are adjusted based on the preset adjustment strategy, and the process jumps to the step of verifying and correcting the equivalent power frequency grounding resistance according to the design basis parameters and the key structural dimension parameters to obtain the corresponding corrected impulse grounding resistance. When the deviation value is less than or equal to the deviation threshold, the key structural dimension parameter is determined as the key structural dimension design parameter.

9. A system for designing the dimensions of an external cage-type grounding electrode for tower pile foundations, characterized in that, include: The acquisition module is used to acquire the design foundation parameters and target impulse grounding resistance of the external cage structure grounding electrode of the tower pile foundation, and to perform equivalent resistance conversion based on the target impulse grounding resistance and the design foundation parameters to obtain the corresponding equivalent power frequency grounding resistance; The inverse calculation module is used to perform inverse calculation of key dimensions based on the equivalent power frequency grounding resistance and the preset resistance contribution ratio, according to the design basic parameters, to obtain the corresponding key structural dimension parameters. The correction module is used to verify and correct the equivalent power frequency grounding resistance based on the design basis parameters and the key structural dimension parameters, so as to obtain the corresponding corrected impulse grounding resistance. The optimization module is used to optimize the key structural dimension parameters using the corrected impulse grounding resistance and the target impulse grounding resistance to obtain the corresponding key structural dimension design parameters.

10. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform the steps of the method for designing the size of the grounding electrode of the external cage structure of the pole pile foundation as described in any one of claims 1-8.

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