Method for determining horizontal grounding electrode in photovoltaic area and corresponding device
By calculating the soil resistivity and support beam resistance of the photovoltaic region, combined with the maximum short-circuit current, the target horizontal grounding electrode of the photovoltaic region is determined, which solves the problem of low accuracy of horizontal grounding in the prior art and improves the stability of the photovoltaic sub-array.
Patent Information
- Application Number
- CN202411544683.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-03-18
AI Technical Summary
In the prior art, the horizontal grounding electrode of the photovoltaic region is determined through empirical values, resulting in low accuracy and affecting the operation stability of the photovoltaic sub-array.
By determining the soil resistivity of the photovoltaic region and the bracket beam resistance and maximum short circuit current of each photovoltaic sub-array, the ground conductor resistance is calculated, and inputting it into the ground resistance model, the horizontal ground electrode diameter is calculated to make the total ground resistance smaller than the preset threshold, and finally, the average diameter is calculated based on the diameters of the multiple photovoltaic sub-arrays to determine the target horizontal ground electrode.
The accuracy of the horizontal grounding electrode in the photovoltaic region is improved, and the operation stability of the photovoltaic sub-array is improved.
Smart Images
Figure CN119647056A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of electronic technology, and in particular, to a method for determining a horizontal grounding electrode in a photovoltaic area and a corresponding device. Background Art
[0002] The horizontal grounding electrode in the photovoltaic area mainly refers to the grounding method buried underground in the photovoltaic system to ensure the safety of equipment and personnel and improve the stability and reliability of system operation. In the related technology, relevant personnel determine the horizontal grounding electrode in the photovoltaic area by empirical value, but the horizontal grounding electrode determined by empirical value may result in low accuracy of the horizontal grounding electrode. Summary of the invention
[0003] The purpose of the present disclosure is to provide a method for determining a horizontal grounding electrode in a photovoltaic area and a corresponding device to solve the technical problems existing in the related art.
[0004] In order to achieve the above objectives, in a first aspect, the present disclosure provides a method for determining a horizontal grounding electrode in a photovoltaic area, the method comprising: Determine the soil resistivity of the photovoltaic area, and for each photovoltaic sub-array in the photovoltaic area, determine the support beam resistance and the maximum short-circuit current of the photovoltaic sub-array; Calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current; Input the grounding conductor resistance, the support beam resistance and the soil resistivity into a grounding resistance model for calculation, and obtain the diameter of the horizontal grounding electrode in the photovoltaic subarray so that the total grounding resistance of the photovoltaic subarray is less than a preset resistance threshold; Calculating an average diameter for the diameters corresponding to a plurality of photovoltaic sub-arrays in the photovoltaic area; A target horizontal grounding electrode for the photovoltaic zone is determined based on the average diameter.
[0005] Optionally, determining the soil resistivity of the photovoltaic area includes: Dividing the photovoltaic area into a plurality of sub-photovoltaic areas according to a preset area threshold; Measuring the sub-soil resistivity of each of the sub-photovoltaic regions, and calculating an average sub-soil resistivity of the sub-soil resistivities corresponding to the multiple sub-photovoltaic regions; The average sub-soil resistivity is determined as the soil resistivity of the photovoltaic area.
[0006] Optionally, determining the support beam resistance of the photovoltaic subarray includes: Obtaining the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams of the photovoltaic subarray; The support beam resistance of the photovoltaic sub-array is calculated according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams.
[0007] Optionally, calculating the support beam resistance of the photovoltaic subarray according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams includes: According to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams, the resistance of the support beams is calculated by the following calculation formula;
[0008] in, is the support beam resistance, is the number of support beams, is the cross-sectional area of the support beam, is the resistivity of the support beam, is the length of the support beam.
[0009] Optionally, calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current includes: Calculating the cross-sectional area of the grounding conductor in the photovoltaic subarray according to the maximum short-circuit current; Determining the resistivity and length of the grounding conductor in the photovoltaic subarray; The ground conductor resistance of the photovoltaic subarray is calculated according to the ground conductor resistivity, the ground conductor length and the ground conductor area.
[0010] Optionally, calculating the cross-sectional area of the grounding conductor in the photovoltaic subarray according to the maximum short-circuit current includes: According to the maximum short-circuit current, the cross-sectional area of the grounding conductor in the photovoltaic sub-array is calculated by the following calculation formula;
[0011] in, is the cross-sectional area of the ground conductor, is the maximum short-circuit current, is the thermal stability coefficient of the grounding conductor material, is the duration of the maximum short-circuit current.
[0012] Optionally, calculating the ground conductor resistance of the photovoltaic subarray according to the ground conductor resistivity, the ground conductor length and the ground conductor area includes: According to the ground conductor resistivity, the ground conductor length and the ground conductor area, the ground conductor resistance of the photovoltaic sub-array is calculated by the following calculation formula;
[0013] in, is the ground conductor resistance, is the ground conductor resistivity, is the ground conductor length, is the cross-sectional area of the ground conductor.
[0014] Optionally, determining a target horizontal grounding electrode of the photovoltaic area according to the average diameter includes: Calculating the cross-sectional area of the target horizontal ground electrode according to the average diameter; A metal conductor buried underground and matching the cross-sectional area is determined as the target horizontal grounding electrode of the photovoltaic area.
[0015] In a second aspect, the present disclosure provides a device for determining a horizontal grounding electrode in a photovoltaic area, comprising a first determination module, a first calculation module, a second calculation module, a third calculation module, and a second determination module; The first determination module is used to determine the soil resistivity of the photovoltaic area, and for each photovoltaic sub-array in the photovoltaic area, determine the support beam resistance and the maximum short-circuit current of the photovoltaic sub-array; The first calculation module is used to calculate the grounding conductor resistance of the photovoltaic sub-array according to the maximum short-circuit current; The second calculation module is used to input the grounding conductor resistance, the support beam resistance and the soil resistivity into the grounding resistance model for calculation, so as to obtain the diameter of the horizontal grounding electrode in the photovoltaic subarray so that the total grounding resistance of the photovoltaic subarray is less than a preset resistance threshold; The third calculation module is used to calculate an average diameter of the diameters corresponding to the plurality of photovoltaic sub-arrays in the photovoltaic area; The second determination module is used to determine the target horizontal grounding electrode of the photovoltaic area according to the average diameter.
[0016] Optionally, the first determining module includes: A region division module, used for dividing the photovoltaic region into a plurality of sub-photovoltaic regions according to a preset area threshold; a fourth calculation module, configured to measure the sub-soil resistivity of each of the sub-photovoltaic regions, and calculate an average sub-soil resistivity of the sub-soil resistivities corresponding to the plurality of sub-photovoltaic regions; The third determination module is used to determine the average sub-soil resistivity as the soil resistivity of the photovoltaic area.
[0017] Optionally, the first determining module includes: A data acquisition module, used to obtain the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams of the photovoltaic subarray; The fifth calculation module is used to calculate the support beam resistance of the photovoltaic sub-array according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams.
[0018] Optionally, the fifth calculation module is used for: According to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams, the resistance of the support beams is calculated by the following calculation formula;
[0019] in, is the support beam resistance, is the number of support beams, is the cross-sectional area of the support beam, is the resistivity of the support beam, is the length of the support beam.
[0020] Optionally, the first calculation module includes: a sixth calculation module, configured to calculate a cross-sectional area of a ground conductor in the photovoltaic sub-array according to the maximum short-circuit current; A fourth determination module, used to determine the resistivity and length of the grounding conductor in the photovoltaic subarray; A seventh calculation module is used to calculate the ground conductor resistance of the photovoltaic sub-array according to the ground conductor resistivity, the ground conductor length and the ground conductor area.
[0021] Optionally, the sixth calculation module is used for: According to the maximum short-circuit current, the cross-sectional area of the grounding conductor in the photovoltaic sub-array is calculated by the following calculation formula;
[0022] in, is the cross-sectional area of the ground conductor, is the maximum short-circuit current, is the thermal stability coefficient of the grounding conductor material, is the duration of the maximum short-circuit current.
[0023] Optionally, the seventh calculation module is used for: According to the ground conductor resistivity, the ground conductor length and the ground conductor area, the ground conductor resistance of the photovoltaic sub-array is calculated by the following calculation formula;
[0024] in, is the ground conductor resistance, is the ground conductor resistivity, is the ground conductor length, is the cross-sectional area of the ground conductor.
[0025] Optionally, the second determining module includes: an eighth calculation module, configured to calculate the cross-sectional area of the target horizontal grounding electrode according to the average diameter; The fifth determination module is used to determine a metal conductor buried underground and matching the cross-sectional area as the target horizontal grounding electrode of the photovoltaic area.
[0026] In a third aspect, the present disclosure provides a non-temporary computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods provided in the first aspect of the present disclosure.
[0027] In a fourth aspect, the present disclosure provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of any one of the methods provided in the first aspect of the present disclosure.
[0028] In a fifth aspect, the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of any one of the methods provided in the first aspect of the present disclosure.
[0029] Through the above technical solution, the grounding conductor resistance of the photovoltaic sub-array is calculated according to the maximum short-circuit current of the photovoltaic pointer, and the grounding conductor resistance, the support beam resistance of the photovoltaic sub-array and the soil resistivity of the photovoltaic area are input into the grounding resistance model to obtain the diameter of the horizontal grounding electrode in the photovoltaic sub-array so that the total grounding resistance of the photovoltaic sub-array is less than the preset resistance threshold. Then, the average diameter of the corresponding diameters of multiple photovoltaic sub-arrays in the photovoltaic area is calculated, and the average diameter is determined as the target horizontal grounding electrode. The target horizontal grounding electrode of the photovoltaic area is determined by the soil resistivity of the photovoltaic area, the maximum short-circuit current of the photovoltaic sub-array and the support beam resistance. Compared with the horizontal grounding electrode selected by the empirical value method in the related art, the accuracy of the target horizontal grounding electrode can be improved, and then the stability of the operation of the photovoltaic sub-array in the photovoltaic area can be improved.
[0030] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The diagram is a schematic diagram showing a method for determining a horizontal grounding electrode in a photovoltaic area according to an exemplary embodiment of the present disclosure.
[0032] Figure 2 It is a schematic diagram showing the total length of the edge of the grounding grid and the total length of the horizontal grounding electrode according to an exemplary embodiment of the present disclosure.
[0033] Figure 3 The figure is a schematic diagram showing a device for determining a horizontal grounding electrode in a photovoltaic area according to an exemplary embodiment of the present disclosure.
[0034] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION
[0035] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0036] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.
[0037] Photovoltaic power generation systems are usually located in open areas and are subject to the risk of lightning strikes. When the photovoltaic sub-array lightning rod in the photovoltaic power generation system is struck by lightning, a high overvoltage is generated on the photovoltaic sub-array frame and grounding bracket. The damage of lightning strikes to photovoltaic sub-arrays is mainly reflected in two forms: direct lightning strikes and induction lightning strikes. Direct lightning strikes mainly refer to lightning directly hitting the photovoltaic sub-array, causing the breakdown of the bypass diode inside the junction box of the battery module in the photovoltaic sub-array, the breakdown of the battery cell, the burning of the line, and other faults, which may make some photovoltaic sub-arrays unable to generate electricity or cause the entire photovoltaic power generation system to be paralyzed. Induction lightning generates induced voltage on metal parts through changes in electromagnetic fields, which may also cause damage to the photovoltaic sub-array. At the same time, when the thundercloud approaches a large area of photovoltaic sub-arrays, an electrostatic induced overvoltage will be generated on the photovoltaic sub-array, and its induced charge is mainly concentrated on the aluminum alloy frame of the component. Therefore, it is necessary to ground the photovoltaic sub-array separately, so that the induced charge can be directly discharged into the ground to protect the photovoltaic sub-array.
[0038] In the related art, the related technicians determine the horizontal grounding electrode in the photovoltaic area based on the empirical value. However, the inventors found that when the horizontal grounding electrode in the photovoltaic area is determined by the empirical value, the accuracy of the determined horizontal grounding electrode is low, which may reduce the stability of the operation of the photovoltaic sub-array in the photovoltaic area.
[0039] In view of this, the present disclosure provides a method for determining a horizontal grounding electrode in a photovoltaic area and a corresponding device to solve the technical problems existing in the above-mentioned related technologies.
[0040] like Figure 1 As shown, Figure 1 is a schematic diagram showing a method for determining a horizontal grounding electrode in a photovoltaic area according to an exemplary embodiment of the present disclosure, with reference to Figure 1 ,include: S101: Determine the soil resistivity of the photovoltaic area, and determine the support beam resistance and the maximum short-circuit current of each photovoltaic sub-array in the photovoltaic area; S102: Calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current; S103: inputting the grounding conductor resistance, the support beam resistance and the soil resistivity into a grounding resistance model for calculation, and obtaining a diameter of a horizontal grounding electrode in the photovoltaic subarray that makes the total grounding resistance of the photovoltaic subarray less than a preset resistance threshold; S104: calculating an average diameter of the diameters corresponding to the plurality of photovoltaic sub-arrays in the photovoltaic area; S105: Determine a target horizontal grounding electrode of the photovoltaic area according to the average diameter.
[0041] Through the above technical solution, the grounding conductor resistance of the photovoltaic sub-array is calculated according to the maximum short-circuit current of the photovoltaic pointer, and the grounding conductor resistance, the support beam resistance of the photovoltaic sub-array and the soil resistivity of the photovoltaic area are input into the grounding resistance model to obtain the diameter of the horizontal grounding electrode in the photovoltaic sub-array so that the total grounding resistance of the photovoltaic sub-array is less than the preset resistance threshold. Then, the average diameter of the corresponding diameters of multiple photovoltaic sub-arrays in the photovoltaic area is calculated, and the average diameter is determined as the target horizontal grounding electrode. The target horizontal grounding electrode of the photovoltaic area is determined by the soil resistivity of the photovoltaic area, the maximum short-circuit current of the photovoltaic sub-array and the support beam resistance. Compared with the horizontal grounding electrode selected by the empirical value method in the related art, the accuracy of the target horizontal grounding electrode can be improved, and then the stability of the operation of the photovoltaic sub-array in the photovoltaic area can be improved.
[0042] In order to enable those skilled in the art to better understand the method for determining the horizontal grounding electrode of the photovoltaic area provided by the present disclosure, the above steps are described in detail with examples below.
[0043] For example, soil resistivity can be used to measure the conductivity of soil. Support beam resistance can be the resistance of a metal beam connecting a photovoltaic module. Maximum short-circuit current can be the maximum value of the short-circuit current passing through the electrical equipment of the photovoltaic sub-array when a short-circuit fault occurs in the photovoltaic sub-array.
[0044] In this embodiment, when determining the horizontal grounding electrode, the soil resistivity of the photovoltaic area, as well as the support beam resistance and the maximum short-circuit current of each photovoltaic sub-array can be determined first, and then the horizontal grounding electrode can be determined based on the soil resistivity, the maximum short-circuit current and the support beam resistance. Compared with the method of determining the horizontal grounding electrode of the photovoltaic area by empirical values in related technologies, the accuracy of the target horizontal grounding electrode can be improved, thereby improving the stability of the operation of the photovoltaic sub-array.
[0045] In a possible manner, determining the soil resistivity of the photovoltaic area includes: Dividing the photovoltaic area into a plurality of sub-photovoltaic areas according to a preset area threshold; Measuring the sub-soil resistivity of each of the sub-photovoltaic regions, and calculating an average sub-soil resistivity of the sub-soil resistivities corresponding to the multiple sub-photovoltaic regions; The average sub-soil resistivity is determined as the soil resistivity of the photovoltaic area.
[0046] It should be understood that when determining the soil resistivity of the photovoltaic area, the average soil resistivity of the sub-soil resistivities corresponding to multiple different photovoltaic areas can be determined as the soil resistivity of the photovoltaic area. In this embodiment, the photovoltaic area can be divided into multiple sub-photovoltaic areas according to a preset area threshold, wherein the preset area threshold can be the area range of the sub-soil resistivity of a point measured, for example, the preset area can be 10000m 2 , you can use 10000m 2 The area range is taken as a sub-photovoltaic zone, and the sub-soil resistivity in the sub-photovoltaic zone is measured. This embodiment of the present disclosure does not make any specific limitation on this.
[0047] Soil resistivity can be calculated using the following formula.
[0048] ,in, is the soil resistivity, is the sub-soil resistivity of the nth sub-PV zone, and n is the number of sub-PV zones.
[0049] Then, the average sub-soil resistivity is calculated for the sub-soil resistivities corresponding to the plurality of sub-photovoltaic areas, and the average sub-soil resistivity area is determined as the soil resistivity of the photovoltaic area.
[0050] In a possible manner, the determining the support beam resistance of the photovoltaic subarray includes: Obtaining the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams of the photovoltaic subarray; The support beam resistance of the photovoltaic sub-array is calculated according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams.
[0051] It should be understood that a photovoltaic sub-array may include multiple support beams. When calculating the support beam resistance, the resistance of all support beams in the photovoltaic sub-array needs to be added to obtain the support beam resistance. Thus, the number of support beams in the photovoltaic sub-array, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams can be determined, and then the support beam resistance of the photovoltaic sub-array can be calculated based on the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams.
[0052] According to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams, the resistance of the support beams can be calculated by the following calculation formula;
[0053] is the support beam resistance, is the number of support beams, is the cross-sectional area of the support beam, is the resistivity of the support beam, is the length of the support beam.
[0054] For example, after obtaining the maximum short-circuit current, the grounding conductor resistance of the photovoltaic subarray may be calculated according to the maximum short-circuit current, wherein the grounding conductor resistance may be the resistance of a conductor connecting the negative terminal of the photovoltaic module and the grounding system in the photovoltaic subarray.
[0055] In a possible manner, the calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current includes: Calculating the cross-sectional area of the grounding conductor in the photovoltaic subarray according to the maximum short-circuit current; Determining the resistivity and length of the grounding conductor in the photovoltaic subarray; The ground conductor resistance of the photovoltaic subarray is calculated according to the ground conductor resistivity, the ground conductor length and the ground conductor area.
[0056] It should be understood that the cross-sectional area of the ground conductor of the photovoltaic sub-array can be calculated by the maximum short-circuit current. The cross-sectional area of the ground conductor in the photovoltaic sub-array can be calculated by the following calculation formula:
[0057] in, is the cross-sectional area of the ground conductor, For the maximum short-circuit current to be large, is the thermal stability coefficient of the grounding conductor material, and the hard copper material Take 7.06, is the duration of the maximum short-circuit current.
[0058] After that, the ground conductor resistivity and ground conductor length in the photovoltaic sub-array can be determined, and then the ground conductor resistance of the photovoltaic sub-array can be calculated based on the ground conductor resistivity, ground conductor length and ground conductor area. The ground conductor resistance of the photovoltaic sub-array can be calculated by the following calculation formula;
[0059] in, is the ground conductor resistance, is the ground conductor resistivity, is the ground conductor length, is the cross-sectional area of the ground conductor.
[0060] For example, after calculating the grounding conductor resistance, the grounding conductor resistance, the support beam resistance, and the soil resistivity can be input into the grounding resistance model for calculation to obtain the diameter of the horizontal grounding electrode of the photovoltaic subarray. The grounding resistance model can be represented by the following calculation formula.
[0061]
[0062]
[0063] in, is the total grounding resistance of the PV array, is the ground resistance of the first PV sub-array, is the total area of the grounding grid where the PV sub-array is located, is the total length of the outer edge of the grounding grid where the photovoltaic sub-array is located, is the soil resistivity of the photovoltaic area, h is the buried depth of the horizontal grounding electrode, d is the diameter or equivalent diameter of the horizontal grounding electrode, is the total length of the horizontal grounding electrode, is a preset resistance threshold, which may be 4Ω. Figure 2 As described above, the reference numeral 1 in the figure is the total length of the outer edge of the grounding grid where the photovoltaic sub-array is located, and the reference numeral 2 in the figure can be the total length of the horizontal grounding electrode.
[0064] For example, one photovoltaic sub-array is correspondingly provided with one grounding grid, and in the photovoltaic area, a uniform horizontal grounding electrode needs to be provided, and thus, the diameter of the target horizontal grounding electrode can be calculated by an average value calculation method.
[0065] In this embodiment, after the diameter of the horizontal ground electrode is calculated, the diameters corresponding to the multiple photovoltaic sub-arrays can be obtained, and then the average diameter of the multiple diameters can be calculated and used as the target horizontal ground electrode of the photovoltaic area.
[0066] In a possible manner, the step of determining a target horizontal grounding electrode of the photovoltaic area according to the average diameter includes: Calculating the cross-sectional area of the target horizontal ground electrode according to the average diameter; A metal conductor buried underground and matching the cross-sectional area is determined as the target horizontal grounding electrode of the photovoltaic area.
[0067] It should be understood that when the cross-sectional area of the target horizontal ground electrode is calculated based on the average value, the cross-sectional area can be calculated by the following calculation formula.
[0068]
[0069] in, is the cross-sectional area, is the average diameter.
[0070] Then, a metal conductor buried underground and matching the cross-sectional area can be determined as the target horizontal grounding electrode of the photovoltaic zone.
[0071] In a photovoltaic subarray, the grounding conductor resistance of the photovoltaic subarray is calculated by the maximum short-circuit current. The grounding conductor resistance, the support beam resistance and the soil resistivity are input into the grounding resistance model to obtain the diameter of the horizontal grounding electrode. The average diameter is calculated according to the diameter corresponding to each photovoltaic subarray, and the cross-sectional area of the horizontal grounding electrode is calculated according to the average diameter. The buried metal conductor matching the cross-sectional area is determined as the target horizontal grounding electrode. Compared with the related art of determining the horizontal grounding electrode by the empirical value method, the accuracy of the target horizontal grounding electrode can be improved, thereby improving the stability of the photovoltaic subarray during operation.
[0072] Based on the same concept, this embodiment also discloses a device for determining the horizontal grounding electrode in a photovoltaic area, referring to Figure 3 , Figure 3 is a schematic diagram showing a device 300 for determining a horizontal grounding electrode in a photovoltaic area according to an exemplary embodiment of the present disclosure, such as Figure 3 As shown, it includes a first determination module 301, a first calculation module 302, a second calculation module 303, a third calculation module 304 and a second determination module 305; The first determination module 301 is used to determine the soil resistivity of the photovoltaic area, and for each photovoltaic sub-array in the photovoltaic area, determine the support beam resistance and the maximum short-circuit current of the photovoltaic sub-array; The first calculation module 302 is used to calculate the grounding conductor resistance of the photovoltaic sub-array according to the maximum short-circuit current; The second calculation module 303 is used to input the grounding conductor resistance, the support beam resistance and the soil resistivity into the grounding resistance model for calculation, so as to obtain the diameter of the horizontal grounding electrode in the photovoltaic subarray so that the total grounding resistance of the photovoltaic subarray is less than a preset resistance threshold; The third calculation module 304 is used to calculate an average diameter of the diameters corresponding to the plurality of photovoltaic sub-arrays in the photovoltaic area; The second determination module 305 is used to determine the target horizontal grounding electrode of the photovoltaic area according to the average diameter.
[0073] Optionally, the first determining module 301 includes: A region division module, used for dividing the photovoltaic region into a plurality of sub-photovoltaic regions according to a preset area threshold; a fourth calculation module, configured to measure the sub-soil resistivity of each of the sub-photovoltaic regions, and calculate an average sub-soil resistivity of the sub-soil resistivities corresponding to the plurality of sub-photovoltaic regions; The third determination module is used to determine the average sub-soil resistivity as the soil resistivity of the photovoltaic area.
[0074] Optionally, the first determining module 301 includes: A data acquisition module, used to obtain the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams of the photovoltaic subarray; The fifth calculation module is used to calculate the support beam resistance of the photovoltaic sub-array according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams.
[0075] Optionally, the fifth calculation module is used for: According to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams, the resistance of the support beams is calculated by the following calculation formula;
[0076] in, is the support beam resistance, is the number of support beams, is the cross-sectional area of the support beam, is the resistivity of the support beam, is the length of the support beam.
[0077] Optionally, the first calculation module 302 includes: a sixth calculation module, configured to calculate a cross-sectional area of a ground conductor in the photovoltaic sub-array according to the maximum short-circuit current; A fourth determination module, used to determine the resistivity and length of the grounding conductor in the photovoltaic subarray; A seventh calculation module is used to calculate the ground conductor resistance of the photovoltaic sub-array according to the ground conductor resistivity, the ground conductor length and the ground conductor area.
[0078] Optionally, the sixth calculation module is used for: According to the maximum short-circuit current, the cross-sectional area of the grounding conductor in the photovoltaic sub-array is calculated by the following calculation formula;
[0079] in, is the cross-sectional area of the ground conductor, is the maximum short-circuit current, is the thermal stability coefficient of the grounding conductor material, is the duration of the maximum short-circuit current.
[0080] Optionally, the seventh calculation module is used for: According to the ground conductor resistivity, the ground conductor length and the ground conductor area, the ground conductor resistance of the photovoltaic sub-array is calculated by the following calculation formula;
[0081] in, is the ground conductor resistance, is the ground conductor resistivity, is the ground conductor length, is the cross-sectional area of the ground conductor.
[0082] Optionally, the second determining module includes: an eighth calculation module, configured to calculate the cross-sectional area of the target horizontal grounding electrode according to the average diameter; The fifth determination module is used to determine a metal conductor buried underground and matching the cross-sectional area as the target horizontal grounding electrode of the photovoltaic area.
[0083] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.
[0084] Based on the same concept, the present embodiment further discloses a non-temporary computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for determining the horizontal grounding electrode of a photovoltaic area disclosed in the present embodiment are implemented.
[0085] Based on the same concept, this embodiment also discloses an electronic device, including: a memory having a computer program stored thereon; The processor is used to execute the computer program in the memory to implement the steps of the method for determining the horizontal grounding electrode of the photovoltaic area disclosed in this embodiment.
[0086] Based on the same concept, this embodiment further discloses a computer program product, including a computer program, which, when executed by a processor, implements the steps of the method for determining the horizontal grounding electrode of a photovoltaic area disclosed in this embodiment.
[0087] Figure 4 FIG. 4 is a block diagram of an electronic device 400 according to an exemplary embodiment. Figure 4 As shown, the electronic device 400 may include: a processor 401 , a memory 402 . The electronic device 400 may also include one or more of a multimedia component 403 , an input / output (I / O) interface 404 , and a communication component 405 .
[0088] The processor 401 is used to control the overall operation of the electronic device 400 to complete all or part of the steps in the method for determining the horizontal grounding electrode of the photovoltaic area disclosed in the present embodiment. The memory 402 is used to store various types of data to support the operation of the electronic device 400, and these data may include, for example, instructions for any application or method used to operate on the electronic device 400, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 403 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, which is used to receive external audio signals. The received audio signal may be further stored in the memory 402 or sent through the communication component 405. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 404 provides an interface between the processor 401 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 405 may include: Wi-Fi module, Bluetooth module, NFC module, etc.
[0089] In an exemplary embodiment, the electronic device 400 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the method for determining the horizontal grounding electrode of the photovoltaic area disclosed in the above-mentioned embodiment.
[0090] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the method for determining the horizontal grounding electrode in the photovoltaic area disclosed in the above embodiment are implemented. For example, the computer-readable storage medium may be the memory 402 including the program instructions, and the program instructions may be executed by the processor 401 of the electronic device 400 to complete the method for determining the horizontal grounding electrode in the photovoltaic area disclosed in the above embodiment.
[0091] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0092] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0093] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A method for determining a horizontal grounding electrode in a photovoltaic area, characterized in that: The method comprises: Determine the soil resistivity of the photovoltaic area, and for each photovoltaic sub-array in the photovoltaic area, determine the support beam resistance and the maximum short-circuit current of the photovoltaic sub-array; Calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current; Input the grounding conductor resistance, the support beam resistance and the soil resistivity into a grounding resistance model for calculation, and obtain the diameter of the horizontal grounding electrode in the photovoltaic subarray so that the total grounding resistance of the photovoltaic subarray is less than a preset resistance threshold; Calculating an average diameter for the diameters corresponding to a plurality of photovoltaic sub-arrays in the photovoltaic area; A target horizontal grounding electrode for the photovoltaic zone is determined based on the average diameter.
2. The method for determining the horizontal grounding electrode in the photovoltaic area according to claim 1, characterized in that: Determining the soil resistivity of the photovoltaic area includes: Dividing the photovoltaic area into a plurality of sub-photovoltaic areas according to a preset area threshold; Measuring the sub-soil resistivity of each of the sub-photovoltaic regions, and calculating an average sub-soil resistivity of the sub-soil resistivities corresponding to the multiple sub-photovoltaic regions; The average sub-soil resistivity is determined as the soil resistivity of the photovoltaic area.
3. The method for determining the horizontal grounding electrode in a photovoltaic area according to claim 1, characterized in that: The step of determining the support beam resistance of the photovoltaic subarray includes: Obtaining the number of support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams of the photovoltaic subarray; The support beam resistance of the photovoltaic sub-array is calculated according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams.
4. The method for determining the horizontal grounding electrode in the photovoltaic area according to claim 3, characterized in that: The step of calculating the support beam resistance of the photovoltaic sub-array according to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams, and the resistivity of the support beams includes: According to the number of the support beams, the cross-sectional area of the support beams, the length of the support beams and the resistivity of the support beams, the resistance of the support beams is calculated by the following calculation formula; in, is the support beam resistance, is the number of support beams, is the cross-sectional area of the support beam, is the resistivity of the support beam, is the length of the support beam.
5. The method for determining the horizontal grounding electrode in a photovoltaic area according to claim 1, characterized in that: The calculating the grounding conductor resistance of the photovoltaic subarray according to the maximum short-circuit current includes: Calculating the cross-sectional area of the grounding conductor in the photovoltaic subarray according to the maximum short-circuit current; Determining the resistivity and length of the grounding conductor in the photovoltaic subarray; The ground conductor resistance of the photovoltaic subarray is calculated according to the ground conductor resistivity, the ground conductor length and the ground conductor area.
6. The method for determining the horizontal grounding electrode in a photovoltaic area according to claim 5, characterized in that: The calculating the cross-sectional area of the grounding conductor in the photovoltaic subarray according to the maximum short-circuit current includes: According to the maximum short-circuit current, the cross-sectional area of the grounding conductor in the photovoltaic sub-array is calculated by the following calculation formula; in, is the cross-sectional area of the ground conductor, is the maximum short-circuit current, is the thermal stability coefficient of the grounding conductor material, is the duration of the maximum short-circuit current.
7. The method for determining the horizontal grounding electrode in a photovoltaic area according to claim 5, characterized in that: The calculating the ground conductor resistance of the photovoltaic subarray according to the ground conductor resistivity, the ground conductor length and the ground conductor area includes: According to the ground conductor resistivity, the ground conductor length and the ground conductor area, the ground conductor resistance of the photovoltaic sub-array is calculated by the following calculation formula; in, is the ground conductor resistance, is the ground conductor resistivity, is the ground conductor length, is the cross-sectional area of the ground conductor.
8. The method for determining the horizontal grounding electrode in a photovoltaic area according to any one of claims 1 to 7, characterized in that: The step of determining a target horizontal grounding electrode of the photovoltaic area according to the average diameter comprises: Calculating the cross-sectional area of the target horizontal ground electrode according to the average diameter; A metal conductor buried underground and matching the cross-sectional area is determined as the target horizontal grounding electrode of the photovoltaic area.
9. A device for determining a horizontal grounding electrode in a photovoltaic area, characterized in that: comprising a first determining module, a first calculating module, a second calculating module, a third calculating module and a second determining module; The first determination module is used to determine the soil resistivity of the photovoltaic area, and for each photovoltaic sub-array in the photovoltaic area, determine the support beam resistance and the maximum short-circuit current of the photovoltaic sub-array; The first calculation module is used to calculate the grounding conductor resistance of the photovoltaic sub-array according to the maximum short-circuit current; The second calculation module is used to input the grounding conductor resistance, the support beam resistance and the soil resistivity into the grounding resistance model for calculation, so as to obtain the diameter of the horizontal grounding electrode in the photovoltaic subarray so that the total grounding resistance of the photovoltaic subarray is less than a preset resistance threshold; The third calculation module is used to calculate an average diameter of the diameters corresponding to the multiple photovoltaic sub-arrays in the photovoltaic area; The second determination module is used to determine the target horizontal grounding electrode of the photovoltaic area according to the average diameter.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, 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 8 are implemented.
11. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 8.
12. A computer program product, comprising 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 8 are implemented.