An alternating current transmission line tower split magnetic field energy extraction enhancement method and device

Abstract

Disclosed is an alternating current transmission line tower separation type magnetic field energy extraction enhancement method and device, which belongs to the technical field of magnetic field energy extraction. The method comprises the following steps: based on the magnetization characteristic curve of the tower and pole steel material of the alternating current transmission line, a first finite element model of the tower and pole of the alternating current transmission line is established, the first finite element model comprising a transmission line and a tower and pole steel structure; a second finite element model of a separation type magnetic field energy extraction device is established, the second finite element model being connected with the tower and pole steel structure, the second finite element model comprising an energy extraction coil and a magnetic core; an equivalent circuit model of the transmission line and the energy extraction coil is established, the equivalent circuit model comprising a compensation capacitor and a load; the first finite element model, the second finite element model and the equivalent circuit model are coupled to obtain a coupled model; the relative distance between the second finite element model and the tower and pole steel structure in the coupled model is adjusted until the output power of the energy extraction coil is maximum. The method can improve the output power of the magnetic field energy extraction device.

Description

Technical Field

[0001] This disclosure relates to the field of magnetic field energy harvesting technology, and in particular to a method and device for enhancing the separated magnetic field energy harvesting of AC transmission line towers. Background Technology

[0002] The operation of new power systems places higher demands on the construction of intelligent power grids. To ensure the safe, reliable, economical, and efficient operation of the power grid system and to build a robust smart grid, it is necessary to install multiple online monitoring devices on the towers of AC transmission lines to monitor the tower conditions. Since these online monitoring devices are installed on the towers, they cannot be powered through the existing AC transmission lines. The power frequency current on the transmission lines induces a rich magnetic field in the surrounding space; therefore, magnetic field energy harvesting technology can be used to power these online monitoring devices.

[0003] Currently, magnetic field energy harvesting technology mainly includes two types: encircling magnetic field harvesting and separate magnetic field harvesting. Encircling magnetic field harvesting requires installation on the line, which is difficult to install and disassemble and requires high insulation. Therefore, separate magnetic field harvesting technology is mainly used. However, the coil of separate magnetic field harvesting technology is often far away from the conductor, resulting in low magnetic field energy density at the location of the separate magnetic field harvesting device and low output power of the device. Summary of the Invention

[0004] This disclosure provides a method and apparatus for enhancing the separated magnetic field energy harvesting of AC transmission line towers, which can improve the output power of the magnetic field energy harvesting device. The technical solution includes at least the following:

[0005] In a first aspect, a method for enhancing the energy harvesting capacity of a separated magnetic field on an AC transmission line tower is provided, comprising: establishing a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the tower steel, the first finite element model including the transmission line and the tower steel structure; establishing a second finite element model of a separated magnetic field energy harvesting device, the second finite element model being connected to the tower steel structure, the second finite element model including an energy harvesting coil and a magnetic core, the energy harvesting coil being wound on the magnetic core; establishing an equivalent circuit model of the transmission line and the energy harvesting coil, the equivalent circuit model including a compensation capacitor and a load; coupling the first finite element model, the second finite element model, and the equivalent circuit model to obtain a coupled model; adjusting the relative distance between the second finite element model and the tower steel structure in the coupled model until the output power of the energy harvesting coil is maximized.

[0006] Optionally, adjusting the relative distance between the second finite element model and the tower steel structure in the coupling model until the output power of the energy harvesting coil is maximized includes: measuring the output power of the energy harvesting coil when the second finite element model is in close contact with the first finite element model; sequentially adjusting the relative distance between the second finite element model and the first finite element model according to a set step size, recording the output power of the energy harvesting coil after each adjustment, thereby obtaining multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance; sorting the output power of the energy harvesting coil corresponding to each relative distance from largest to smallest to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is maximized.

[0007] Optionally, the method further includes: after adjusting the relative distance between the second finite element model and the first finite element model at any time, modifying the capacitance value of the compensation capacitor so that the compensation capacitor and the energy harvesting coil resonate in series.

[0008] Optionally, the tower steel structure is a rectangular structure, the transmission line passes through the tower steel structure, and the second finite element model is located at the corner of the rectangular structure of the tower steel structure.

[0009] Optionally, establishing a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the AC transmission line tower steel includes: obtaining the magnetization characteristic curve of the AC transmission line tower steel; importing the magnetization characteristic curve into the tower steel structure of the first finite element model to obtain the first finite element model of the AC transmission line tower.

[0010] Secondly, a separate magnetic field energy harvesting enhancement device for AC transmission line towers is also provided, comprising: a first modeling module for establishing a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the tower steel, the first finite element model including the transmission line and the tower steel structure; a second modeling module for establishing a second finite element model of the separate magnetic field energy harvesting device, the second finite element model being connected to the tower steel structure, the second finite element model including an energy harvesting coil and a magnetic core, the energy harvesting coil being wound on the magnetic core; a third modeling module for establishing an equivalent circuit model of the transmission line and the energy harvesting coil, the equivalent circuit model including a compensation capacitor and a load; a coupling module for coupling the first finite element model, the second finite element model, and the equivalent circuit model to obtain a coupled model; and an adjustment module for adjusting the relative distance between the second finite element model and the tower steel structure in the coupled model until the output power of the energy harvesting coil is maximized.

[0011] Optionally, the adjustment module is further configured to measure the output power of the energy harvesting coil when the second finite element model is in close contact with the first finite element model; adjust the relative distance between the second finite element model and the first finite element model sequentially according to a set step size, record the output power of the energy harvesting coil after each adjustment, thereby obtaining multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance; sort the output power of the energy harvesting coil corresponding to each relative distance in descending order, so as to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is the maximum.

[0012] Optionally, the adjustment module is further configured to modify the capacitance value of the compensation capacitor after any adjustment of the relative distance between the second finite element model and the first finite element model, so that the compensation capacitor and the energy harvesting coil resonate in series.

[0013] Optionally, the first modeling module is further configured to obtain the magnetization characteristic curve of the steel of the AC transmission line tower; and import the magnetization characteristic curve into the tower steel structure of the first finite element model to obtain the first finite element model of the AC transmission line tower.

[0014] Thirdly, a computer device is also provided, comprising: a memory and a processor, wherein the memory stores at least one computer program, the at least one computer program being loaded and executed by the processor to perform the AC transmission line tower separate magnetic field energy extraction enhancement method described in the above embodiments.

[0015] Fourthly, a computer-readable storage medium is also provided, wherein at least one computer program is stored in the computer-readable storage medium, the at least one computer program being loaded and executed by a processor to perform the AC transmission line tower separate magnetic field energy harvesting enhancement method described in the above embodiments.

[0016] Fifthly, a computer program product is provided, including a computer program / instructions that, when executed by a processor, implement the method described in the first aspect.

[0017] The beneficial effects of the technical solutions provided in this disclosure include at least the following:

[0018] The relative distance between the tower steel structure and the separate magnetic field energy harvesting device affects the output power of the separate magnetic field energy harvesting device. In this embodiment, by adjusting the relative distance between the second finite element model in the coupling model and the tower steel structure until the output power of the energy harvesting coil is maximized, the relative distance that maximizes the output power of the second finite element model (i.e., the separate magnetic field energy harvesting device) can be found, thereby effectively improving the output power of the separate magnetic field energy harvesting device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a method for enhancing the energy harvesting of separated magnetic fields on AC transmission line towers, provided in an exemplary embodiment of this disclosure, is shown.

[0021] Figure 2 A flowchart of a separate magnetic field energy harvesting enhancement method for AC transmission line towers provided in another exemplary embodiment of this disclosure is shown;

[0022] Figure 3 These are schematic diagrams of the first and second finite element models.

[0023] Figure 4 This is a schematic diagram of the equivalent circuit model;

[0024] Figure 5 This is a schematic diagram showing the relative distance between the first finite element model and the second finite element model;

[0025] Figure 6 This is a schematic diagram of the back-end circuit.

[0026] Figure 7 A schematic diagram of the output voltage for a power-on simulation test of a physical model;

[0027] Figure 8 This illustration shows a schematic diagram of a separate magnetic field energy harvesting and enhancement device for AC transmission line towers provided in an exemplary embodiment of the present disclosure;

[0028] Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure. Detailed Implementation

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0030] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0031] Figure 1 A flowchart illustrating a separate magnetic field energy harvesting enhancement method for AC transmission line towers, provided in an exemplary embodiment of this disclosure, is shown. This method can be executed by a computer device. See also Figure 1 The method includes:

[0032] In step 101, a first finite element model of the AC transmission line tower is established based on the magnetization characteristic curve of the steel of the AC transmission line tower.

[0033] The first finite element model includes the transmission line and the steel structure of the tower.

[0034] Here, the positional relationship between the tower steel structure and the AC transmission line in the first finite element model is obtained by simulating the positional relationship between the actual AC transmission line tower and the actual transmission line.

[0035] In step 102, a second finite element model of the split magnetic field energy harvesting device is established.

[0036] The second finite element model is connected to the tower steel structure. The second finite element model includes an energy harvesting coil and a magnetic core, with the energy harvesting coil wound on the magnetic core.

[0037] Here, the main structure of the real split magnetic field energy harvesting device includes the energy harvesting coil and the magnetic core. Similarly, the positional relationship between the energy harvesting coil and the magnetic core in the second finite element model is obtained by simulating the positional relationship between the real energy harvesting coil and the real magnetic core.

[0038] In step 103, an equivalent circuit model of the transmission line and the energy extraction coil is established.

[0039] The equivalent circuit model includes a compensation capacitor and a load.

[0040] In step 104, the first finite element model, the second finite element model, and the equivalent circuit model are coupled to obtain a coupled model.

[0041] In step 105, the relative distance between the second finite element model and the tower steel structure in the coupling model is adjusted until the output power of the energy harvesting coil is maximized.

[0042] The relative distance between the tower steel structure and the separate magnetic field energy harvesting device affects the output power of the separate magnetic field energy harvesting device. In this embodiment, by adjusting the relative distance between the second finite element model in the coupling model and the tower steel structure until the output power of the energy harvesting coil is maximized, the relative distance that maximizes the output power of the second finite element model (i.e., the separate magnetic field energy harvesting device) can be found, thereby effectively improving the output power of the separate magnetic field energy harvesting device.

[0043] Figure 2 A flowchart illustrating a separate magnetic field energy harvesting enhancement method for AC transmission line towers, provided in another exemplary embodiment of this disclosure, is shown. This method can be executed by a computer device. See also Figure 2 The method includes:

[0044] In step 201, the magnetization characteristic curve of the steel of the AC transmission line tower is obtained.

[0045] The magnetization characteristic curve reflects the change in magnetic flux density as the magnetic field strength changes. The towers of AC transmission lines are made of steel, which is situated within the magnetic field induced by the power frequency current on the transmission line. When the power frequency current changes, the strength of the generated magnetic field may change, consequently affecting the magnetic flux density of the tower. Therefore, it is necessary to obtain the magnetization characteristic curve of the steel used in AC transmission line towers and import this curve into the first finite element model to avoid the influence of changes in magnetic field strength on the magnetic flux density of the tower.

[0046] For example, if the tower steel structure is made of Q235 steel, then the magnetization characteristic curve of the tower steel is the same as that of Q235 steel.

[0047] In step 202, the magnetization characteristic curve is imported into the tower steel structure of the first finite element model to obtain the first finite element model of the AC transmission line tower.

[0048] The first finite element model includes the transmission line and the steel structure of the tower. For example, the transmission line is a single-phase AC transmission line.

[0049] Optionally, in the first finite element model, the tower steel structure is a rectangular structure, and the transmission line passes through the tower steel structure.

[0050] Figure 3 The diagram shows the structures of the first and second finite element models. Figure 3 As shown, the first finite element model includes a tower steel structure 301 and a transmission line 302. The tower steel structure 301 is a rectangular structure, and the transmission line 302 passes through the tower steel structure 301.

[0051] In step 203, a second finite element model of the split magnetic field energy harvesting device is established.

[0052] The second finite element model is connected to the tower steel structure. The second finite element model includes an energy harvesting coil and a magnetic core, with the energy harvesting coil wound on the magnetic core.

[0053] Optionally, the second finite element model is located at the corner of the rectangular structure of the tower steel structure.

[0054] like Figure 3 As shown, the second finite element model includes a magnetic core 303 and an energy harvesting coil 304. The second finite element model is located at the upper left corner (i.e., the corner) of the rectangular structure of the tower steel structure 301.

[0055] For example, in the first finite element model, the material of the conductor in the transmission line is set to copper, the relative permeability of the transmission line is set to 0.99, and the excitation type of the transmission line is set to coil. The steel material of the tower structure is set to Q235 steel, and the rectangular tower structure can be obtained by connecting four L-shaped steel beams end to end, which can be bolted together. The surrounding medium in both the first and second finite element models is set to air, and the relative permeability of air is set to 1.

[0056] In the second finite element model, the energy harvesting coil is made of copper, and the number of turns of the wire in the coil can be 1000-6000, for example, 1000, 2000, 4000, or 6000 turns. The energy harvesting coil is wound in layers, with 1000 turns per layer, and a total of 1-6 layers can be wound. The excitation type of the energy harvesting coil is set to coil. The magnetic core material is silicon steel sheet, which is made of stacked silicon steel sheets.

[0057] When solving the first finite element model and the second finite element model, it is also necessary to set the solution boundary. The part beyond the solution boundary does not need to be solved. For example, the solution boundary region is about 3 to 6 times the size of the first finite element model and the second finite element model, such as 3 times, 5 times or 6 times.

[0058] In step 204, an equivalent circuit model of the transmission line and the energy extraction coil is established.

[0059] The equivalent circuit model includes a compensation capacitor and a load.

[0060] Figure 4 This is a schematic diagram of the equivalent circuit model. (For example...) Figure 4 As shown, when the current in the transmission line is 100A, the excitation of the circuit containing transmission line L1 is set by an AC 10V voltage source U. s A 10A AC current is provided by the 1Ω internal resistance r. In the circuit containing the energy harvesting coil L2, the compensation capacitor C1, the energy harvesting coil L2, and the equivalent load R are connected in series.

[0061] In step 205, the first finite element model, the second finite element model, and the equivalent circuit model are coupled to obtain a coupled model.

[0062] During coupling, the transmission line in the equivalent circuit model is associated with the transmission line in the first finite element model, and the energy harvesting coil in the equivalent circuit model is associated with the energy harvesting coil in the first finite element model.

[0063] Optionally, the compensation capacitor in the equivalent circuit model resonates in series with the energy extraction coil.

[0064] Studies have shown that the size of the compensation capacitor affects the output of the energy harvesting coil. Table 1 below shows the load power under different compensation capacitors obtained by simulation in the coupled circuit when the current in the transmission line is 100A and the excitation setting of the circuit where the transmission line is located is provided by an AC 10V voltage source and a 1Ω internal resistance to generate 10A AC power.

[0065] Table 1: Load power under different compensation capacitors.

[0066] Compensation capacitor C [μF] Load voltage U [V] Power P [mW] for a 1000-ohm load 0 0.35 0.122 0.44 0.44 0.193 0.49 0.547 0.299 0.54 0.684 0.467 0.59 0.698 0.487 0.64 0.823 0.677 0.69 0.94 0.883 0.74 1.262 1.593 0.78 1.283 1.646 0.79 1.282 1.643 0.84 1.247 1.555 0.89 1.182 1.398 0.94 1.104 1.219 0.99 1.03 1.062 1.04 0.964 0.93 1.09 0.908 0.825 1.14 0.859 0.737 1.17 0.832 0.692

[0067] As shown in Table 1, the load power is maximized when the compensation capacitor achieves series resonance with the energy extraction coil (i.e., when the compensation capacitor is 0.78μF). Compared to the case without series resonance, the output voltage is increased by approximately 3.7 times and the output power is increased by approximately 13.4 times when the compensation capacitor achieves series resonance, and it is also improved compared to the case without resonance. This indicates that properly configuring the size of the compensation capacitor can effectively improve the output power. The configuration of the compensation capacitor follows the principle of series resonance, that is, the compensation capacitor value that satisfies the following formula (1) is the optimal compensation capacitor value.

[0068]

[0069] In formula (1), ω is the resonant frequency of the circuit, l is the equivalent inductance of the energy extraction coil, and C is the capacitance value of the compensation capacitor.

[0070] In step 206, the relative distance between the second finite element model and the tower steel structure in the coupling model is adjusted until the output power of the energy harvesting coil is maximized.

[0071] Optionally, step 206 includes the following three steps:

[0072] The first step is to measure the output power of the energy harvesting coil when the second finite element model is in close contact with the first finite element model.

[0073] The second step involves sequentially adjusting the relative distance between the second finite element model and the first finite element model according to the set step size. After each adjustment, the output power of the energy harvesting coil is recorded, thereby obtaining multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance.

[0074] The change in the relative distance between the second finite element model and the first finite element model is equivalent to altering the overall tower steel structure and the magnetic circuit structure of the magnetic core, or in other words, changing the coupling form of the primary and secondary circuits. This alters the coupling coefficient, leading to a change in the equivalent inductance of the energy harvesting coil. This change in the equivalent inductance of the energy harvesting coil means that the original compensation capacitor value and the changed equivalent inductance cannot form a series resonance.

[0075] To achieve maximum output power, the method may optionally further include: after adjusting the relative distance between the second finite element model and the first finite element model at any time, modifying the capacitance value of the compensation capacitor so that the compensation capacitor and the energy harvesting coil resonate in series.

[0076] In this way, after each adjustment of the relative distance, the compensation capacitor in the equivalent circuit achieves series resonance with the equivalent inductance of the energy harvesting coil, thereby effectively improving the output power of the energy harvesting coil.

[0077] For example, the maximum value of the relative distance between the second finite element model and the first finite element model is in the range of 10mm-25mm, such as 10mm, 15mm, 20mm or 25mm.

[0078] Figure 5 This diagram illustrates the relative distance between the first and second finite element models. Initially, the second finite element model is connected to the first finite element model (i.e., the second finite element model is flush with the first finite element model, and the relative distance can be considered to be 0). As the relative distance between the first and second finite element models is gradually adjusted, the second finite element model gradually moves away from the first finite element model. At this point, the first and second finite element models are no longer connected. Figure 5 The situation in the middle.

[0079] The third step is to sort the output power of the energy harvesting coil corresponding to each relative distance from largest to smallest, in order to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is maximized.

[0080] Table 2 is a comparison table of multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance, with a maximum relative distance of 25mm and a step size of 2mm.

[0081] Table 2: Comparison table of multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance.

[0082] Relative distance L [mm] Equivalent load power P [mW] 0 1.736 2 2.517 4 2.529 6 3.072 8 3.098 10 3.181 12 3.139 14 3.127 16 3.039 18 3.036 20 3.065 22 3.028 24 2.984 25 2.42

[0083] If the multiple equivalent load powers (i.e. output powers) in Table 2 are sorted from largest to smallest, the relative distance when the equivalent load power is at its maximum is 10mm. When the relative position is 10mm, the output power is increased by 83% compared to when the relative position is 0mm, indicating that properly selecting the relative position between the separated magnetic field energy harvesting device and the steel structure can improve the output power.

[0084] In this embodiment of the disclosure, the output power of the energy harvesting coil is maximized when the relative position is 10mm. Therefore, the AC transmission line tower split magnetic field energy harvesting enhancement method can improve the output power of the split magnetic field energy harvesting device by setting the relative distance between the split magnetic field energy harvesting device and the tower steel structure to 10mm.

[0085] The following is a physical model verification of the case where the relative distance between the separated magnetic field energy harvesting device and the tower steel structure in the embodiments of this disclosure is set to 10mm.

[0086] First, a physical model is established, in which the positions of each component are the same as those of each component in the first and second finite element models.

[0087] In the physical model, the magnetic core has a rectangular cross-section, 300mm in length and 10mm in width, with each core sheet being 0.4mm thick, and a total of 40 sheets. The energy harvesting coil in the physical model has 4000 turns of 0.5mm diameter enameled wire, and is wound in layers of 1000 turns per layer, for a total of 4 layers. The relative distance between the separate magnetic field energy harvesting device and the steel structure in the physical model is set at 10mm, which can be achieved by placing a 10mm thick wooden board at the connection between the magnetic core and the tower steel structure to replace the air gap. To ensure a tight connection between the tower steel structure, the wooden board, and the separate magnetic field energy harvesting device, steel clamps can be used to fix the three components, ensuring the physical stability of the entire physical model. Furthermore, the steel clamps themselves are small in size and have insulating coatings at their contact points with the tower steel structure and the separate magnetic field energy harvesting device; therefore, the impact of the steel clamps on the overall system is negligible.

[0088] Then the magnetic core and the energy harvesting coil are connected to the back-end circuit of the separate magnetic field energy harvesting device. The back-end circuit is used to convert the AC voltage obtained by the magnetic core and the energy harvesting coil into a stable voltage for output, which is used to power the load. Figure 6 This is a schematic diagram of the back-end circuit.

[0089] Figure 7 This is a schematic diagram of the output voltage for a power-on simulation test of the physical model. (Example:) Figure 7 As shown, U in The AC voltage obtained by the energy extraction coil, U out To determine the output voltage after the AC voltage is converted by the back-end circuit, a power-on simulation test was conducted on the physical model. With a 25A circuit passing through the transmission line and various loads applied, the output voltage of the back-end circuit was measured. It can be seen that when the load is greater than or equal to 3000 ohms, the output voltage of the physical model stabilizes at approximately 12V. Therefore, the maximum output power of the physical model under a 3000-ohm load is 48.9mW.

[0090] Under the same conditions, when the relative distance between the separated magnetic field energy harvesting device and the steel structure in the physical model is 0, and the circuit passing through the transmission line is 25A with a load of 3000 ohms, the maximum output power of the physical model on the load is 35.5mW.

[0091] It can be seen that, under laboratory test conditions, setting the relative distance between the separated magnetic field energy harvesting device and the steel structure to 10mm increases the output power by approximately 37.7%. Therefore, the separated magnetic field energy harvesting enhancement method for AC transmission line towers in this embodiment can effectively improve the energy harvesting power of the magnetic field energy harvesting device, meet the power supply requirements of most monitoring equipment, and help realize the self-powering of monitoring equipment, thereby improving the safety and reliability of the power system.

[0092] The following are device embodiments of this application. For details not described in detail in the device embodiments, please refer to the above method embodiments.

[0093] Figure 8 A schematic diagram of a separate magnetic field energy harvesting and enhancement device for AC transmission line towers, provided in an exemplary embodiment of this disclosure, is shown. See also Figure 8 The AC transmission line tower-separated magnetic field energy harvesting enhancement device 800 includes: a first modeling module 801, a second modeling module 802, a third modeling module 803, a coupling module 804, and an adjustment module 805.

[0094] The first modeling module 801 is used to establish a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the AC transmission line tower steel. The first finite element model includes the transmission line and the tower steel structure.

[0095] The second modeling module 802 is used to establish a second finite element model of the split magnetic field energy harvesting device. The second finite element model is connected to the tower steel structure. The second finite element model includes an energy harvesting coil and a magnetic core, with the energy harvesting coil wound on the magnetic core.

[0096] The third modeling module 803 is used to establish an equivalent circuit model of the transmission line and the energy extraction coil. The equivalent circuit model includes a compensation capacitor and a load.

[0097] The coupling module 804 is used to couple the first finite element model, the second finite element model, and the equivalent circuit model to obtain a coupled model.

[0098] The adjustment module 805 is used to adjust the relative distance between the second finite element model and the tower steel structure in the coupling model until the output power of the energy harvesting coil is maximized.

[0099] Optionally, the adjustment module 805 is also used to measure the output power of the energy harvesting coil when the second finite element model is in close contact with the first finite element model; adjust the relative distance between the second finite element model and the first finite element model in sequence according to the set step size, and record the output power of the energy harvesting coil after each adjustment, so as to obtain multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance; sort the output power of the energy harvesting coil corresponding to each relative distance from large to small, so as to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is the largest.

[0100] Optionally, the adjustment module 805 is also used to modify the capacitance value of the compensation capacitor after any adjustment of the relative distance between the second finite element model and the first finite element model, so that the compensation capacitor and the energy harvesting coil resonate in series.

[0101] Optionally, the first modeling module 801 is also used to obtain the magnetization characteristic curve of the steel of the AC transmission line tower; and to import the magnetization characteristic curve into the tower steel structure of the first finite element model to obtain the first finite element model of the AC transmission line tower.

[0102] It should be noted that the AC transmission line tower separate magnetic field energy harvesting enhancement device provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the AC transmission line tower separate magnetic field energy harvesting enhancement device and the AC transmission line tower separate magnetic field energy harvesting enhancement method embodiment provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0103] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods are possible. Furthermore, the functional modules in the various embodiments of this disclosure can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0104] If the integrated module is implemented as a software functional module 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 this disclosure, 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 terminal device (which may be a personal computer, mobile phone, or communication device, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this disclosure. 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.

[0105] Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure. For example... Figure 9 As shown, the computer device 900 includes a processor 901 and a memory 902.

[0106] Processor 901 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 901 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 901 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 901 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 901 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0107] The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 902 is used to store at least one instruction, which is executed by the processor 901 to implement a method for separately operated magnetic field energy harvesting enhancement of AC transmission line towers provided in this disclosure.

[0108] Those skilled in the art will understand that Figure 9 The structure shown does not constitute a limitation on the computer device 900, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0109] This disclosure also provides a non-transitory computer-readable storage medium, which, when the instructions in the storage medium are executed by the processor of a computer device, enables the computer device to perform a method for enhancing the energy harvesting of a separated magnetic field on an AC transmission line tower provided in this disclosure.

[0110] This disclosure also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements a method for enhancing the energy harvesting of separated magnetic fields on AC transmission line towers provided in this disclosure.

[0111] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A method for enhancing the energy harvesting capacity of AC transmission line towers using a separate magnetic field, characterized in that, The method includes: Based on the magnetization characteristic curve of the AC transmission line tower steel, a first finite element model of the AC transmission line tower is established. The first finite element model includes the transmission line and the tower steel structure. A second finite element model of the split magnetic field energy harvesting device is established. The second finite element model is connected to the tower steel structure. The second finite element model includes an energy harvesting coil and a magnetic core. The energy harvesting coil is wound on the magnetic core. An equivalent circuit model of the transmission line and the energy extraction coil is established, and the equivalent circuit model includes a compensation capacitor and a load. The first finite element model, the second finite element model, and the equivalent circuit model are coupled to obtain a coupled model. Adjust the relative distance between the second finite element model and the tower steel structure in the coupling model until the output power of the energy harvesting coil is maximized. At this time, the first finite element model and the second finite element model are not connected. When the relative distance between the second finite element model and the tower steel structure is 10mm, the output power of the energy harvesting coil is maximized. The maximum value of the relative distance between the second finite element model and the first finite element model ranges from 10mm to 25mm.

2. The method according to claim 1, characterized in that, Adjusting the relative distance between the second finite element model and the tower steel structure in the coupling model until the output power of the energy harvesting coil is maximized includes: The output power of the energy harvesting coil is measured when the second finite element model is in close contact with the first finite element model; The relative distance between the second finite element model and the first finite element model is adjusted sequentially according to the set step size. After each adjustment, the output power of the energy harvesting coil is recorded, thereby obtaining multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance. The output power of the energy harvesting coil corresponding to each relative distance is sorted from largest to smallest to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is the largest.

3. The method according to claim 2, characterized in that, The method further includes: After adjusting the relative distance between the second finite element model and the first finite element model at any time, the capacitance value of the compensation capacitor is modified so that the compensation capacitor and the energy harvesting coil resonate in series.

4. The method according to any one of claims 1 to 3, characterized in that, The tower steel structure is rectangular, and the transmission line passes through the tower steel structure. The second finite element model is located at the corner of the rectangular structure of the tower steel structure.

5. The method according to any one of claims 1 to 3, characterized in that, The establishment of a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the steel of the AC transmission line tower includes: Obtain the magnetization characteristic curve of the steel of the AC transmission line tower; The magnetization characteristic curve is imported into the tower steel structure of the first finite element model to obtain the first finite element model of the AC transmission line tower.

6. A separate magnetic field energy harvesting and enhancement device for AC transmission line towers, characterized in that, The device includes: The first modeling module is used to establish a first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the AC transmission line tower steel. The first finite element model includes the transmission line and the tower steel structure. The second modeling module is used to establish a second finite element model of the split magnetic field energy harvesting device. The second finite element model is connected to the tower steel structure. The second finite element model includes an energy harvesting coil and a magnetic core. The energy harvesting coil is wound on the magnetic core. The third modeling module is used to establish an equivalent circuit model of the transmission line and the energy extraction coil. The equivalent circuit model includes a compensation capacitor and a load. A coupling module is used to couple the first finite element model, the second finite element model, and the equivalent circuit model to obtain a coupled model. The adjustment module is used to adjust the relative distance between the second finite element model and the tower steel structure in the coupling model until the output power of the energy harvesting coil is maximized. At this time, the first finite element model and the second finite element model are not connected. When the relative distance between the second finite element model and the tower steel structure is 10mm, the output power of the energy harvesting coil is maximized. The maximum value of the relative distance between the second finite element model and the first finite element model ranges from 10mm to 25mm.

7. The apparatus according to claim 6, characterized in that, The adjustment module is also used to measure the output power of the energy harvesting coil when the second finite element model is in close contact with the first finite element model; The relative distance between the second finite element model and the first finite element model is adjusted sequentially according to the set step size. After each adjustment, the output power of the energy harvesting coil is recorded, thereby obtaining multiple relative distances and the output power of the energy harvesting coil corresponding to each relative distance. The output power of the energy harvesting coil corresponding to each relative distance is sorted from largest to smallest to determine the relative distance between the energy harvesting coil and the tower steel structure when the output power of the energy harvesting coil is the largest.

8. A computer device, characterized in that, The computer device includes a memory and a processor, wherein the memory stores at least one computer program, which is loaded and executed by the processor to implement the method according to any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which is loaded and executed by a processor to implement the method of any one of claims 1 to 5.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the method described in any one of claims 1 to 5.

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