Alternating current transmission line tower separation type magnetic field energy taking enhancement method and device

Abstract

The invention discloses an alternating-current transmission line tower separation type magnetic field energy taking enhancement method and device, and belongs to the technical field of magnetic field energy taking, and the method comprises the steps that a first finite element model of an alternating-current transmission line tower is established based on a magnetization characteristic curve of alternating-current transmission line tower steel, and the first finite element model comprises a transmission line and a tower steel structure; a second finite element model of the separated magnetic field energy taking device is established, the second finite element model is connected with the tower pole steel structure, and the second finite element model comprises an energy taking coil and a magnetic core; establishing an equivalent circuit model of the power transmission line and the energy taking coil, wherein the equivalent circuit model comprises 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; and adjusting the relative distance between the second finite element model in the coupling model and the tower pole steel structure until the output power of the energy taking coil is maximum. The method can improve the output power of the magnetic field energy taking device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of magnetic field energy harvesting, and in particular to a method and device for enhancing magnetic field energy harvesting of an AC transmission line tower separation. Background Art

[0002] The operation of the new power system has put forward higher requirements for the intelligent construction of the power grid. In order to ensure the safe, reliable, economical and efficient operation of the power grid system and build a strong smart grid, it is necessary to install multiple online monitoring devices on the towers of the AC transmission lines to realize the status monitoring of the towers. Since the online monitoring equipment is installed on the towers, these online monitoring equipment cannot be powered by the original AC transmission lines. The power frequency current on the transmission line will induce a rich magnetic field in the surrounding space, so the magnetic field energy extraction technology can be used to realize the power supply of these online monitoring devices.

[0003] At present, magnetic field energy harvesting technologies mainly include two types: wraparound magnetic field energy harvesting and separation magnetic field energy harvesting. Wraparound magnetic field energy harvesting needs to be installed on the line, which is difficult to install and disassemble and requires very high insulation requirements. Therefore, separation magnetic field energy harvesting technology is mainly used, but the coil of separation magnetic field energy harvesting technology is often far away from the wire, resulting in a low magnetic field energy density at the location of the separation magnetic field energy harvesting device, and the output power of the separation magnetic field energy harvesting device is low. Summary of the invention

[0004] The present disclosure provides a method and device for enhancing magnetic field energy extraction of AC transmission line tower separation, which can improve the output power of the magnetic field energy extraction device. The technical solution includes at least the following solutions:

[0005] In a first aspect, a method for enhancing separated magnetic field energy harvesting of an AC transmission line tower is provided, comprising: establishing a first finite element model of the AC transmission line tower based on a magnetization characteristic curve of AC transmission line tower steel, the first finite element model comprising a transmission line and a 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 comprising an energy harvesting coil and a magnetic core, the energy harvesting coil being wound around the magnetic core; establishing an equivalent circuit model of the transmission line and the energy harvesting coil, the equivalent circuit model comprising 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 maximum.

[0006] Optionally, the 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 extraction coil is maximized includes: measuring the output power of the energy extraction coil when the second finite element model is close to the first finite element model; adjusting the relative distance between the second finite element model and the first finite element model in sequence according to a set step size, and recording the output power of the energy extraction coil after each adjustment, so as to obtain multiple relative distances and the output power of the energy extraction coil corresponding to each relative distance; and sorting the output power of the energy extraction coil corresponding to each relative distance from large to small, so as to determine the relative distance between the energy extraction coil and the tower steel structure when the output power of the energy extraction coil is maximized.

[0007] Optionally, the method further includes: after any adjustment of the relative distance between the second finite element model and the first finite element model, modifying the capacitance value of the compensation capacitor so that the compensation capacitor resonates in series with the energy extraction coil.

[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 a corner of the rectangular structure of the tower steel structure.

[0009] Optionally, establishing the first finite element model of the AC transmission line tower based on the magnetization characteristic curve of the AC transmission line tower steel comprises: acquiring 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] In the second aspect, a separate magnetic field energy extraction enhancement device for an AC transmission line tower is also provided, comprising: a first modeling module, 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 including the transmission line and the tower steel structure; a second modeling module, used to establish a second finite element model of the separate magnetic field energy extraction device, the second finite element model is connected to the tower steel structure, the second finite element model includes an energy extraction coil and a magnetic core, the energy extraction coil is wound on the magnetic core; a third modeling module, used to establish an equivalent circuit model of the transmission line and the energy extraction coil, the equivalent circuit model including a compensation capacitor and a load; a coupling module, used to couple the first finite element model, the second finite element model and the equivalent circuit model to obtain a coupling model; an adjustment module, 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 extraction coil is maximum.

[0011] Optionally, the adjustment module is also used to measure the output power of the energy extraction coil when the second finite element model is close to 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 extraction coil after each adjustment, so as to obtain multiple relative distances and the output power of the energy extraction coil corresponding to each relative distance; sort the output power of the energy extraction coil corresponding to each relative distance from large to small, so as to determine the relative distance between the energy extraction coil and the tower steel structure when the output power of the energy extraction coil is the largest.

[0012] Optionally, the adjustment module is further 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 extraction coil are in series resonance.

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

[0014] In a third aspect, a computer device is also provided, including: a memory and a processor, wherein at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor, so as to execute the method for enhancing the magnetic field energy extraction of an AC transmission line tower separation as described in the above embodiment.

[0015] In a fourth aspect, a computer-readable storage medium is also provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor, thereby executing a method for enhancing the magnetic field energy extraction of an AC transmission line tower separation as described in the above embodiment.

[0016] In a fifth aspect, a computer program product is provided, comprising a computer program / instruction, wherein when the computer program / instruction is executed by a processor, the method described in the first aspect is implemented.

[0017] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure include at least:

[0018] The relative distance between the tower steel structure and the separate magnetic field energy harvesting device will affect the output power of the separate magnetic field energy harvesting device. In the embodiment disclosed herein, 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, it is possible to find the relative distance that maximizes the output power of the second finite element model (that is, the separate magnetic field energy harvesting device), thereby effectively improving the output power of the separate magnetic field energy harvesting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A flow chart of a method for enhancing magnetic field energy extraction of an AC transmission line tower separation type provided by an exemplary embodiment of the present disclosure is shown;

[0021] Figure 2 A flow chart of a method for enhancing magnetic field energy extraction of an AC transmission line tower separation type provided by another exemplary embodiment of the present disclosure is shown;

[0022] Figure 3 is a schematic diagram of the structure of the first finite element model and the second finite element model;

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

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

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

[0026] Figure 7 This is a schematic diagram of the output voltage of the physical model when it is powered on for simulation testing;

[0027] Figure 8 A schematic structural diagram of an AC transmission line tower-separated magnetic field energy extraction enhancement device provided by an exemplary embodiment of the present disclosure is shown;

[0028] Fig. 9 It is a schematic diagram of the structure of a computer device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0030] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0031] Figure 1 A flowchart of a method for enhancing magnetic field energy extraction of an AC transmission line tower separation type provided by an exemplary embodiment of the present disclosure is shown, and the method can be executed by a computer device. Figure 1 , the method comprising:

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

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

[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 a real AC transmission line tower and a real transmission line.

[0035] In step 102, a second finite element model of the split-type 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 extraction coil and a magnetic core. The energy extraction coil is wound around the magnetic core.

[0037] Here, the main structure of the real separated 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 also 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 power transmission line and the energy extraction coil is established.

[0039] The equivalent circuit model includes compensation capacitors and 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 extraction coil is maximized.

[0042] The relative distance between the tower steel structure and the separate magnetic field energy harvesting device will affect the output power of the separate magnetic field energy harvesting device. In the embodiment disclosed herein, 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, it is possible to find the relative distance that maximizes the output power of the second finite element model (that is, the separate magnetic field energy harvesting device), thereby effectively improving the output power of the separate magnetic field energy harvesting.

[0043] Figure 2 A flowchart of a method for enhancing magnetic field energy extraction of an AC power transmission line tower separation type provided by another exemplary embodiment of the present disclosure is shown. The method can be executed by a computer device. Figure 2 , the method comprising:

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

[0045] The magnetization characteristic curve reflects the magnetic induction intensity that changes with the change of magnetic field strength. The tower pole of the AC transmission line is made of steel, which is in the magnetic field induced by the power frequency current on the transmission line. When the power frequency current changes, the magnetic field strength of the generated magnetic field may change, which in turn causes the magnetic induction intensity of the tower pole to change. Therefore, it is necessary to obtain the magnetization characteristic curve of the steel of the AC transmission line tower pole and import the magnetization characteristic curve into the first finite element model to avoid the influence of the change of magnetic field strength on the magnetic induction intensity of the tower pole.

[0046] Exemplarily, the tower steel structure is made of Q235 steel, and the magnetization characteristic curve of the tower steel is the magnetization characteristic curve of Q235 steel.

[0047] In step 202, the magnetization characteristic curve is introduced 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 a transmission line and a tower steel structure. Exemplarily, 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 is a schematic diagram of the structure of the first finite element model and the second finite element model. Figure 3 As shown, the first finite element model includes a tower steel structure 301 and a transmission line 302 , wherein 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 separate 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 extraction coil and a magnetic core. The energy extraction coil is wound around the magnetic core.

[0053] Optionally, the second finite element model is located at a 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 extraction coil 304 , and the second finite element model is located at the upper left corner (that is, 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 magnetic 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 steel structure is set to Q235 steel, and the tower steel structure of the rectangular structure can be obtained by connecting four L-shaped steels end to end, and the four L-shaped steels can be connected by bolts. The surrounding medium of the first finite element model and the second finite element model is set to air, and the relative magnetic permeability of air is set to 1.

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

[0057] When solving the first finite element model and the second finite element model, a solution boundary needs to be set, and the portion exceeding the solution boundary does not need to be solved. Exemplarily, the solution boundary area is about 3-6 times the size of the first finite element model and the second finite element model, for example, 3 times, 5 times or 6 times.

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

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

[0060] Figure 4 is a schematic diagram of the equivalent circuit model. Figure 4 As shown, when the current in the transmission line is 100A, the excitation setting of the loop where the transmission line L1 is located is provided by an AC 10V voltage source U s , 10A AC power generated by 1Ω internal resistance r is provided. In the loop where the energy taking coil L2 is located, the compensation capacitor C1, the energy taking 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 power transmission line in the equivalent circuit model is associated with the power transmission line in the first finite element model, and the energy extraction coil in the equivalent circuit model is associated with the energy extraction 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 will affect the output of the energy-taking coil. Table 1 below shows the load power table under different compensation capacitors obtained by simulation in the coupling circuit when the current in the transmission line is 100A and the excitation setting of the loop where the transmission line is located is provided by 10A AC power generated by a 10V AC voltage source and a 1Ω internal resistance.

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

[0066] Compensation capacitor C[μF] Load voltage U[V] 1000 ohm load power P[mW] 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] Based on Table 1, it can be seen that when the compensation capacitor meets the series resonance with the energy extraction coil (that is, when the compensation capacitor is 0.78μF), the load power is the largest. When the compensation capacitor meets the series resonance, the output voltage is increased by about 3.7 times, and the output power is increased by about 13.4 times compared with the case without series resonance. It is also improved compared with the case without resonance. This shows that the reasonable configuration of the size of the compensation capacitor can effectively increase 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 extraction 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 extraction coil when the second finite element model is close to the first finite element model.

[0073] In the second step, the relative distance between the second finite element model and the first finite element model is adjusted in sequence according to the set step size, and the output power of the energy harvesting coil is recorded after each adjustment, so as to obtain 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 changing the magnetic circuit structure of the overall tower steel structure and the magnetic core, or changing the coupling form of the primary and secondary circuits, thereby changing the coupling coefficient, resulting in a change in the equivalent inductance of the energy extraction coil. The change in the equivalent inductance of the energy extraction coil will result in the original compensation capacitance value and the changed equivalent inductance not being able to form a series resonance.

[0075] In order to achieve the maximum output power, optionally, the method further includes: after any adjustment of the relative distance between the second finite element model and the first finite element model, modifying the capacitance value of the compensation capacitor so that the compensation capacitor and the energy extraction coil are in series resonance.

[0076] In this way, each time the relative distance is adjusted, 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] Exemplarily, the maximum value of the relative distance between the second finite element model and the first finite element model ranges from 10 mm to 25 mm, for example, 10 mm, 15 mm, 20 mm or 25 mm.

[0078] Figure 5 is a schematic diagram of the relative distance between the first finite element model and the second finite element model. Initially, the second finite element model is connected to the first finite element model (that is, the second finite element model is close to the first finite element model, and the relative distance can be considered to be 0 at this time). As the relative distance between the first finite element model and the second finite element model is gradually adjusted, the second finite element model gradually moves away from the first finite element model. At this time, the first finite element model and the second finite element model are not connected, that is, Figure 5 The situation in.

[0079] The third step is to sort the output powers of the energy taking coils corresponding to each relative distance from large to small, so as to determine the relative distance between the energy taking coil and the tower steel structure when the output power of the energy taking coil is the largest.

[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 when the maximum relative distance is 25 mm and the step length is 2 mm.

[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 large to small, the relative distance when the equivalent load power is the largest is 10 mm. When the relative position is 10 mm, the output power is increased by 83% compared with the relative position of 0, indicating that the output power can be increased by reasonably selecting the relative position between the separated magnetic field energy harvesting device and the steel structure.

[0084] In the embodiment of the present disclosure, when the relative position is 10 mm, the output power of the energy harvesting coil is the largest. Therefore, the method for enhancing the separated magnetic field energy harvesting of the AC transmission line tower can increase the output power of the separated magnetic field energy harvesting device by setting the relative distance between the separated magnetic field energy harvesting device and the tower steel structure to 10 mm.

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

[0086] First, a physical model is established, and the positions of various components in the physical model are the same as the positions of various components in the first finite element model and the second finite element model.

[0087] The cross section of the magnetic core in the physical model is rectangular, with a length of 300mm and a width of 10mm. The thickness of a single magnetic core is 0.4mm, and the number of pieces is 40. The number of turns of the wire of the energy-taking coil in the physical model is 4000. The wire is an enameled wire with a diameter of 0.5mm. The energy-taking coil is wound in layers, with 1000 turns per layer, and a total of 4 layers. The relative distance between the separated magnetic field energy-taking device and the steel structure in the physical model is set to 10mm, which can be achieved by setting a 10mm thick wooden board at the connection between the magnetic core and the tower steel structure to replace the air gap. In order to ensure that the tower steel structure, the wooden board, and the separated magnetic field energy-taking device are tightly connected, a steel clamp can be used to fix the three, ensuring the physical stability of the entire physical model; at the same time, the steel clamp itself is small in size and the contact parts with the tower steel structure and the separated magnetic field energy-taking device are all insulated, so the impact of the steel clamp on the entire system can be ignored.

[0088] The magnetic core and the energy harvesting coil are then connected to the back-end circuit of the separated 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 A schematic diagram of the back-end circuit.

[0089] Figure 7 This is a schematic diagram of the output voltage of the physical model when it is powered on for simulation testing. Figure 7 As shown, U in is the AC voltage obtained by the energy-taking coil, U out The voltage output after the AC voltage is converted by the back-end circuit. The physical model is subjected to a power-on simulation test. When the circuit passing through the transmission line is 25A, the output voltage of the back-end circuit is measured when different loads are installed. It can be seen that when the load is greater than or equal to 3000 ohms, the output voltage of the physical model is stable at about 12V. The maximum output power of the physical model on 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, the circuit passing through the transmission line is 25A, and the load is 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, when the relative distance between the separated magnetic field energy harvesting device and the steel structure is set to 10 mm, the output power is increased by about 37.7%. Therefore, the separated magnetic field energy harvesting enhancement method for AC transmission line towers in the disclosed embodiment can effectively increase the energy harvesting power of the magnetic field energy harvesting device, meet the power supply requirements of most monitoring equipment, and help the monitoring equipment to achieve self-power supply, thereby improving the safety and reliability of the power system.

[0092] The following are device embodiments of the present application. For details not described in detail in the device embodiments, reference may be made to the above method embodiments.

[0093] Figure 8 The structure diagram of an AC transmission line tower separated magnetic field energy enhancement device provided by an exemplary embodiment of the present disclosure is shown. Figure 8 The AC transmission line tower separated magnetic field energy 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, and 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 separated 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 around the magnetic core.

[0096] The third modeling module 803 is used to establish an equivalent circuit model of the power transmission line and the energy extraction coil, and 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 extraction coil is maximized.

[0099] Optionally, the adjustment module 805 is also used to measure the output power of the energy extraction coil when the second finite element model is close to 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 extraction coil after each adjustment, so as to obtain multiple relative distances and the output power of the energy extraction coil corresponding to each relative distance; sort the output power of the energy extraction coil corresponding to each relative distance from large to small, so as to determine the relative distance between the energy extraction coil and the tower steel structure when the output power of the energy extraction coil is the largest.

[0100] Optionally, the adjustment module 805 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 resonates in series with the energy extraction coil.

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

[0102] It should be noted that: when the separated magnetic field energy extraction enhancement device for the AC transmission line tower provided in the above embodiment performs separated magnetic field energy extraction enhancement, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the separated magnetic field energy extraction enhancement device for the AC transmission line tower provided in the above embodiment and the separated magnetic field energy extraction enhancement method embodiment for the AC transmission line tower belong to the same concept. The specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0103] The division of modules in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present disclosure may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0104] If the integrated module is implemented in the form of a software function 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 the present disclosure is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a terminal device (which can be a personal computer, a mobile phone, or a communication device, etc.) or a processor (processor) to perform all or part of the steps of the method of each embodiment of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0105] Fig. 9 Schematic diagram of the structure of the computer device provided by the embodiment of the present disclosure. Fig. 9 As shown, the computer device 900 includes: a processor 901 and a memory 902 .

[0106] The processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 901 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 901 may also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 901 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 901 may also include an AI (Artificial Intelligence) processor, which is used to process computing 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 a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 902 is used to store at least one instruction, which is used to be executed by the processor 901 to implement an AC transmission line tower separation magnetic field energy enhancement method provided in an embodiment of the present disclosure.

[0108] Those skilled in the art will understand that Fig. 9 The structure shown in the figure does not constitute a limitation on the computer device 900, and the computer device 900 may include more or less components than those shown in the figure, or combine some components, or adopt a different arrangement of components.

[0109] The embodiment of the present disclosure also provides a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by a processor of a computer device, the computer device can execute an AC transmission line tower separated magnetic field energy extraction enhancement method provided in the embodiment of the present disclosure.

[0110] The embodiments of the present disclosure also provide a computer program product, including a computer program / instruction, which, when executed by a processor, implements an AC transmission line tower separated magnetic field energy extraction enhancement method provided in the embodiments of the present disclosure.

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

Claims

1. A method for enhancing magnetic field energy extraction from a tower-separated AC transmission line, characterized in that: The method comprises: 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, wherein the first finite element model includes the transmission line and the tower steel structure; Establishing a second finite element model of the separated magnetic field energy harvesting device, wherein the second finite element model is connected to the tower steel structure, and the second finite element model comprises an energy harvesting coil and a magnetic core, wherein the energy harvesting coil is wound around the magnetic core; Establishing an equivalent circuit model of the power transmission line and the energy extraction coil, wherein 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; 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 extraction coil is maximum.

2. The method according to claim 1, characterized in that The step of 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 extraction coil is maximized includes: measuring the output power of the energy extraction coil when the second finite element model is close to the first finite element model; The relative distance between the second finite element model and the first finite element model is adjusted in sequence according to a set step length, and the output power of the energy extraction coil is recorded after each adjustment, so as to obtain multiple relative distances and the output power of the energy extraction coil corresponding to each relative distance; The output powers of the energy taking coils corresponding to each relative distance are sorted from large to small to determine the relative distance between the energy taking coil and the tower steel structure when the output power of the energy taking coil is the largest.

3. The method according to claim 2, characterized in that The method further comprises: After the relative distance between the second finite element model and the first finite element model is adjusted any time, the capacitance value of the compensation capacitor is modified so that the compensation capacitor and the energy extraction coil are in series resonance.

4. The method according to any one of claims 1 to 3, characterized in that: 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 a 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 method of 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 comprises: Obtaining a magnetization characteristic curve of the AC transmission line tower steel; The magnetization characteristic curve is introduced 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. An AC transmission line tower separated magnetic field energy enhancement device, characterized in that: The device comprises: A first modeling module is used to establish a first finite element model of the AC transmission line tower based on a magnetization characteristic curve of the AC transmission line tower steel, wherein the first finite element model includes a transmission line and a tower steel structure; A second modeling module is used to establish a second finite element model of the separated magnetic field energy extraction device, wherein the second finite element model is connected to the tower steel structure, and the second finite element model includes an energy extraction coil and a magnetic core, and the energy extraction coil is wound around the magnetic core; A third modeling module is used to establish an equivalent circuit model of the transmission line and the energy extraction coil, wherein the equivalent circuit model includes a compensation capacitor and a load; A coupling module, used for coupling 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 extraction coil is maximum.

7. The device according to claim 6, characterized in that The adjustment module is further used to measure the output power of the energy extraction coil when the second finite element model is close to the first finite element model; The relative distance between the second finite element model and the first finite element model is adjusted in sequence according to a set step length, and the output power of the energy extraction coil is recorded after each adjustment, so as to obtain multiple relative distances and the output power of the energy extraction coil corresponding to each relative distance; The output powers of the energy taking coils corresponding to each relative distance are sorted from large to small to determine the relative distance between the energy taking coil and the tower steel structure when the output power of the energy taking coil is the largest.

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

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