Drone charging method and apparatus for power distribution network

Abstract

Embodiments of the present application provide a kind of unmanned aerial vehicle charging method and equipment for power distribution network.The equipment includes: the transmitting module being arranged on ground charging platform and the receiving module being arranged in the unmanned aerial vehicle to be charged, the transmitting module includes: the multiple-frequency inverter, compensation circuit and multiple-frequency resonant coupling device connected in sequence, the multiple-frequency inverter is used to convert the power supply direct current power of ground charging platform into multiple-frequency band alternating current power, after reactive power compensation by compensation circuit, it is transmitted by multiple-frequency resonant coupling device and is magnetically coupled, the receiving module includes: the multiple-frequency receiving coil, rectifier circuit and intelligent dynamic power regulation circuit connected in sequence, the multiple-frequency receiving coil receives multiple-frequency band alternating current power after coupling and is matched, and after rectification by rectifier circuit, it is converted into stable direct current power, and charging power is adjusted by intelligent dynamic power regulation circuit.The technical scheme of the application can realize the fast charging of unmanned aerial vehicle in power distribution network.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology for unmanned aerial vehicles (UAVs), and more particularly to a UAV charging method and device for power distribution networks. Background Technology

[0002] In power systems, drone inspection technology has become a key means to ensure the safe operation of distribution networks. By monitoring key operating parameters such as temperature, vibration, and current of power equipment in real time, drone inspections of distribution networks achieve comprehensive monitoring of power equipment, thereby predicting potential faults and effectively ensuring the safety of the power system.

[0003] Existing charging technologies include contact charging and electromagnetic radiation wireless charging. Contact charging uses a mechanical structure to align and press the electrodes of the transmitter and receiver together, directly conducting current. Electromagnetic radiation wireless charging mainly uses high-frequency alternating current to generate an alternating magnetic field in the transmitter coil, which is then coupled to the receiver coil through electromagnetic induction, and finally converted into direct current by a rectifier circuit to charge the battery.

[0004] However, existing charging technologies suffer from low charging efficiency. Summary of the Invention

[0005] This application provides a method and apparatus for charging drones in power distribution networks, thereby improving the charging efficiency of drones.

[0006] In a first aspect, embodiments of this application provide a drone charging device for a power distribution network, comprising: a transmitting module disposed on a ground charging platform and a receiving module disposed on the drone to be charged;

[0007] The transmitting module includes: a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device connected in sequence. The multi-frequency inverter is used to convert the DC power supply from the ground charging platform into multi-frequency AC power. The compensation circuit is used to perform reactive power compensation on the multi-frequency AC power to obtain compensated multi-frequency AC power. The multi-frequency resonant coupling device is used to perform magnetic resonant coupling on the compensated multi-frequency AC power and transmit the coupled multi-frequency AC power to the receiving module in parallel.

[0008] The receiving module includes: a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit connected in sequence. The multi-frequency receiving coil is used to perform multi-frequency matching reception of the coupled multi-frequency AC power. The rectifier circuit is used to rectify the coupled multi-frequency AC power into stable DC power. The intelligent dynamic power adjustment circuit is used to determine the battery status of the drone to be charged and adjust the charging power of the stable DC power according to the battery status. The battery status includes: charging status and health status.

[0009] In one or more embodiments, the compensation circuit includes: an inductor, a capacitor, a resistor, and a compensation controller;

[0010] The inductor is connected in series in the compensation circuit to filter out high-frequency harmonic noise in the multi-band AC power.

[0011] The capacitor is connected in parallel in the compensation circuit to form a multi-frequency resonant circuit with the inductor, which is used to match multiple frequency components in the multi-frequency AC power and compensate for reactive power.

[0012] The resistor is connected in series across the inductor and the capacitor to control the current of the multi-band AC power and prevent circuit overload.

[0013] The compensation controller is connected to the inductor, the capacitor, and the resistor respectively, and is used to control the compensation parameters corresponding to the inductor, the capacitor, and the resistor respectively.

[0014] In one or more embodiments, the multi-frequency resonant coupling device includes: a plurality of coupling coils with resonant frequencies;

[0015] The multiple resonant frequency coupling coils are arranged in a spiral shape to match the multiple frequency components of the compensated multi-band AC power and perform magnetic resonance coupling to generate the coupled multi-band AC power.

[0016] In one or more embodiments, the rectifier circuit includes: a high-efficiency rectifier;

[0017] The high-efficiency rectifier is connected to the multi-frequency receiving coil and the intelligent dynamic power regulation circuit, respectively, and is used to rectify and filter the multi-band AC power transmitted by the multi-frequency receiving coil to obtain the stable DC power, and transmit the stable DC power to the intelligent dynamic power regulation circuit.

[0018] In one or more embodiments, the intelligent dynamic power regulation circuit includes: a microcontroller, a power regulation module, and a sensor;

[0019] The sensor is used to collect battery data of the drone to be charged and transmit the battery data to the microcontroller. The battery data includes voltage, current, and temperature.

[0020] The microcontroller is connected to the power regulation module and is used to determine the battery status of the drone to be charged based on the battery data and transmit it to the power regulation module.

[0021] The power adjustment module is used to adjust the charging power of the stable DC power according to the battery status of the drone to be charged.

[0022] In one or more embodiments, the power regulation module includes: a DC-DC converter;

[0023] The DC-DC converter is used to convert the voltage and current of the stable DC power into an adjustable output voltage and an adjustable output current, respectively, using pulse width modulation.

[0024] In one or more embodiments, the receiving module further includes: a user interface;

[0025] The user interface is connected to the microcontroller and is used to display the battery data and the battery status of the drone to be charged.

[0026] In one or more embodiments, the receiving module further includes: a relay and an overcharge protection circuit;

[0027] The relay is connected to the overcharge protection circuit and is used to control the on and off of the battery charging circuit of the drone to be charged.

[0028] The overcharge protection circuit is connected to the intelligent dynamic power adjustment circuit and is used to trigger a relay to cut off the charging current when the battery of the drone to be charged is in a charging state and the battery voltage reaches a preset threshold.

[0029] Secondly, embodiments of this application provide a method for charging unmanned aerial vehicles (UAVs) in a power distribution network, applied to the transmitting module in the UAV charging equipment for a power distribution network described in the first aspect, the method comprising:

[0030] The DC power supply to the ground charging platform is converted into multi-frequency AC power through multi-frequency resonant conversion.

[0031] Reactive power compensation is performed on the multi-band AC power to obtain compensated multi-band AC power.

[0032] The compensated multi-band AC power is magnetically coupled to obtain the target multi-band AC power.

[0033] In one or more embodiments, the reactive power compensation of the multi-band AC power to obtain compensated multi-band AC power includes:

[0034] High-frequency harmonic noise in the multi-band AC power is filtered out to obtain filtered multi-band AC power.

[0035] The multiple frequency components in the filtered multi-band AC power are matched, and the reactive power corresponding to each frequency component is compensated to obtain the compensated multi-band AC power.

[0036] Thirdly, embodiments of this application provide a drone charging device for a power distribution network, applied to the launch module in the aforementioned drone charging equipment for a power distribution network, the device comprising:

[0037] The conversion module is used to perform multi-frequency resonant conversion on the DC power supply to the ground charging platform to obtain multi-frequency AC power.

[0038] The compensation module is used to perform reactive power compensation on the multi-band AC power to obtain compensated multi-band AC power.

[0039] The coupling module is used to perform magnetic resonance coupling on the compensated multi-band AC power to obtain the target multi-band AC power.

[0040] In one or more embodiments, the compensation module is specifically used for:

[0041] High-frequency harmonic noise in the multi-band AC power is filtered out to obtain filtered multi-band AC power.

[0042] The multiple frequency components in the filtered multi-band AC power are matched, and the reactive power corresponding to each frequency component is compensated to obtain the compensated multi-band AC power.

[0043] The present application provides a method and apparatus for charging unmanned aerial vehicles (UAVs) in a power distribution network. The apparatus includes a transmitting module mounted on a ground charging platform and a receiving module mounted on the UAV to be charged. The transmitting module includes a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device connected in sequence. The multi-frequency inverter converts the DC power supplied by the ground charging platform into multi-frequency AC power. The compensation circuit performs reactive power compensation on the multi-frequency AC power to obtain compensated multi-frequency AC power. The multi-frequency resonant coupling device performs magnetic resonant coupling on the compensated multi-frequency AC power and transmits the coupled multi-frequency AC power in parallel to the receiving module. The receiving module includes a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit connected in sequence. The multi-frequency receiving coil performs multi-frequency matching reception on the coupled multi-frequency AC power. The rectifier circuit rectifies the coupled multi-frequency AC power into stable DC power. The intelligent dynamic power adjustment circuit determines the battery status of the UAV to be charged and adjusts the charging power of the stable DC power according to the battery status. The battery status includes charging status and health status. The technical solution of this application sets up a transmitting module on a ground charging platform and a receiving module on the drone to be charged. The transmitting module converts the DC power supply into multi-band AC power, which is then compensated and transmitted in parallel to the receiving module through a multi-band resonant coupling device. The receiving module then performs multi-band matching reception, rectification and conversion, and dynamically adjusts the charging power according to the charging status and health status of the drone. This can improve the charging efficiency of drones in power grid inspection scenarios, and also take into account charging safety and stability. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0045] Figure 1 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 1 ;

[0046] Figure 2 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 2 ;

[0047] Figure 3 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 3 ;

[0048] Figure 4 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 4 ;

[0049] Figure 5 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 5 ;

[0050] Figure 6 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 6 ;

[0051] Figure 7 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 7 ;

[0052] Figure 8 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 8 ;

[0053] Figure 9 A schematic flowchart illustrating a method for charging a drone in a power distribution network, provided in an embodiment of this application.

[0054] Figure 10 This is a schematic diagram of the structure of a drone charging device for a power distribution network provided in an embodiment of this application.

[0055] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0057] Before introducing the embodiments of this application, the application background of the embodiments of this application will be explained first:

[0058] In power systems, drone inspection technology has become a key means of ensuring the safe operation of distribution networks. Drones typically undertake tasks such as line inspection, pole and tower inspection, and equipment status data collection. To ensure the continuity of inspections, it is usually necessary to establish a power replenishment link between the ground charging platform and the drone, so that the drone can return to the platform to recharge after completing a phase of its work, and then continue to perform subsequent inspection tasks.

[0059] Unmanned aerial vehicle (UAV) inspections of power distribution networks enable comprehensive monitoring of power equipment by real-time monitoring of key operating parameters such as temperature, vibration, and current. This allows for the prediction of potential faults and effectively safeguards the safety of the power system.

[0060] Existing charging technologies include contact charging and electromagnetic radiation wireless charging. Contact charging uses a mechanical structure to align and press the electrodes of the transmitter and receiver together, directly conducting current. Electromagnetic radiation wireless charging typically uses fixed transmitter and receiver structures for energy transmission. Its transmission efficiency largely depends on the distance and relative position between the transmitter and receiver, as well as external metal obstacles. It mainly utilizes high-frequency alternating current to generate an alternating magnetic field in the transmitter coil, which is then coupled to the receiver coil via electromagnetic induction. Finally, it is converted into direct current by a rectifier circuit to charge the battery.

[0061] However, contact charging requires manual intervention to ensure electrode alignment, has high maintenance costs, and is difficult to deploy quickly in complex terrain. Although electromagnetic radiation wireless charging technology can achieve contactless power supply, its energy transmission efficiency is low and its safety is poor (it is susceptible to environmental interference and poses a radiation risk to the human body), making it difficult to meet the needs of power distribution network inspection for fast and stable charging.

[0062] In summary, existing charging technologies suffer from low charging efficiency.

[0063] This application provides a drone charging device for power distribution networks, aiming to solve the aforementioned technical problems of existing technologies. The technical concept of this application is as follows: Existing charging technologies mainly charge drones through contact charging and electromagnetic radiation wireless charging, which suffers from low charging efficiency. Charging drones primarily focuses on non-contact charging and improving the stability of non-contact charging power transmission. If the frequency of power transmission can be effectively adjusted, charging efficiency can be improved. Therefore, this application considers setting up a transmitting module on a ground charging platform and a receiving module on the drone to be charged. The transmitting module's multi-frequency inverter, compensation circuit, and multi-frequency resonant coupling device complete the transmission and coupling of multi-frequency AC power. The receiving module's multi-frequency receiving coil, rectifier circuit, and intelligent dynamic power adjustment circuit complete the reception, rectification, and charging power adjustment based on the battery charging status and health status, thereby improving charging efficiency and stability in power distribution network inspection scenarios.

[0064] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0065] Figure 1 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 1 .like Figure 1 As shown, the drone charging equipment for power distribution networks includes: a transmitting module mounted on a ground charging platform and a receiving module mounted on the drone to be charged;

[0066] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0067] 1) The transmitting module includes: a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device connected in sequence;

[0068] Multi-frequency inverters are used to convert the DC power supplied to the ground charging platform into multi-frequency AC power.

[0069] The compensation circuit is used to perform reactive power compensation on multi-frequency AC power to obtain compensated multi-frequency AC power.

[0070] A multi-frequency resonant coupling device is used to magnetically resonate and couple the compensated multi-frequency AC power to the receiving module and transmit the coupled multi-frequency AC power in parallel.

[0071] For example, the transmitting module is an energy transmitting unit set on the ground charging platform to convert the DC power supplied by the ground charging platform into multi-band AC power suitable for wireless coupling transmission. In the overall UAV charging equipment used for power distribution network, it undertakes the functions of power conversion and coupling transmission, and maintains a spatial correspondence with the receiving module during charging to establish a magnetic resonance transmission channel.

[0072] A multi-frequency inverter is a power conversion unit installed in the transmitter module to convert the DC power supplied by the ground charging platform into AC power in multiple frequency bands.

[0073] The compensation circuit refers to the circuit unit connected in series or in parallel to the output side of the multi-frequency inverter for reactive power compensation of multi-frequency AC power. It is used to adjust the voltage, current phase relationship and impedance characteristics of the inverter output to form a resonant state suitable for the operation of the multi-frequency resonant coupling device.

[0074] A multi-frequency resonant coupling device is a coupling component located at the end of the transmitting module, used to transmit compensated multi-band AC power to the receiving module in a magnetic resonance manner.

[0075] In one possible implementation, the launch module can be encapsulated as a platform-type charging base. The top of the charging base is provided with a bearing surface for the drone to dock. The charging base contains a multi-frequency inverter, compensation circuit, and multi-frequency resonant coupling device. It can be lightweight and can be installed using a metal substrate or flexible circuit board. The housing of the charging base can be made of aluminum alloy, carbon fiber composite material, or flame-retardant engineering plastic to adapt to the outdoor environment of the power distribution network inspection site.

[0076] In addition, the size of the charging base corresponding to the transmitting module can be set according to the take-off and landing scale of the UAV. Its effective transmitting area is usually larger than the projected area of ​​the multi-frequency receiving coil to ensure coverage and coupling tolerance after landing. The coupling gap between it and the receiving module can be configured to meet the magnetic resonance coupling conditions in the range of millimeters to centimeters.

[0077] In one possible implementation, the multi-frequency inverter can be constructed using a full-bridge inverter topology, a half-bridge inverter topology, or a multi-level inverter topology, so as to output multiple operating frequency points or frequency band combinations according to different control strategies, and the control circuit of the multi-frequency inverter can be an independent drive board or an integrated control board.

[0078] In one possible implementation, the compensation circuit can be implemented using series compensation, parallel compensation, series-parallel composite compensation, or inductor-capacitor compensation structures. Its compensation elements can include capacitors, inductors, adjustable inductors, or switchable capacitor arrays to adapt to compensation requirements under different frequency bands and different coupling gaps. Furthermore, the layout of the compensation elements in the compensation circuit can be partitioned according to heat dissipation and electromagnetic compatibility requirements. The compensation circuit can be integrated on an independent circuit board or arranged on the same board as the multi-frequency inverter. Its size is usually configured adjacent to the multi-frequency inverter to shorten the high-frequency current path and reduce the influence of parasitic parameters. Its component layout can be partitioned according to heat dissipation and electromagnetic compatibility requirements.

[0079] In one possible implementation, the multi-frequency resonant coupling device generates a spatial magnetic field in the drone charging equipment and transmits the coupled multi-band AC power in parallel to the receiving module. The multi-frequency resonant coupling device can consist of one or more sets of transmitting coils, and the transmitting coil frame can be made of insulating composite materials, heat-resistant plastics, or glass fiber reinforced materials to withstand the thermal and mechanical loads during long-term operation.

[0080] In addition, the multi-frequency resonant coupling device can be equipped with a shielding layer, a magnetic conductive layer, or a positioning and guiding structure to limit the magnetic field distribution and assist in the relative alignment of the UAV after it has landed. The external dimensions of the multi-frequency resonant coupling device are usually consistent with the transmitting area of ​​the ground charging platform, and the effective coverage area of ​​the coil is preferably larger than the projected area of ​​the multi-frequency receiving coil to accommodate a certain degree of landing deviation and maintain stable coupling.

[0081] 2) The receiving module includes: a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit connected in sequence;

[0082] A multi-frequency receiving coil is used for multi-band matched reception of coupled multi-frequency AC power.

[0083] A rectifier circuit is used to rectify coupled multi-band AC power into stable DC power.

[0084] The intelligent dynamic power adjustment circuit is used to determine the battery status of the drone to be charged and adjust the charging power of the stable DC power according to the battery status. The battery status includes charging status and health status.

[0085] For example, the receiving module is an airborne energy receiving unit installed on the drone to be charged, used to receive the coupled energy emitted by the ground charging platform and convert it into DC power suitable for battery charging. It is installed on the bottom or lower part of the drone and maintains a corresponding coupling relationship with the transmitting module after the drone lands.

[0086] A multi-frequency receiving coil is an induction coil assembly located at the front end of the receiving module for multi-frequency matching reception of coupled multi-frequency AC power. Together with the multi-frequency resonant coupling device on the transmitting side, it forms a magnetic field coupling circuit and transmits the coupled multi-frequency AC power to the rectifier circuit.

[0087] In one possible implementation, the receiving module can be integrated as an airborne receiving unit and embedded in the landing gear, fuselage, or bottom mounting bay of the drone to be charged. The shell of the airborne receiving unit can be made of aluminum alloy, carbon fiber composite material, or flame-retardant engineering plastic to balance weight and environmental adaptability. The internal circuit carriers of the airborne receiving unit can be compactly arranged using metal substrates or flexible circuit boards. The size of the receiving module should match the mounting space at the bottom of the drone, and its coupling surface should maintain a close correspondence with the transmitting module. Its structural thickness is usually limited by the drone's load and center of gravity requirements to ensure that it does not interfere with take-off, landing, and flight stability.

[0088] In one possible implementation, the coil conductor of the multi-frequency receiving coil can be made of enameled copper wire, Litz wire, or copper foil to reduce high-frequency loss. The coil frame can be made of insulating plastic, glass fiber composite material, or flexible support sheet. Furthermore, the effective receiving area of ​​the multi-frequency receiving coil is preferably matched with the coupling area of ​​the multi-frequency resonant coupling device in the transmitting module.

[0089] In one possible implementation, the rectifier circuit can be located on a separate circuit board, typically positioned adjacent to the multi-frequency receiving coil, to shorten the AC-to-DC conversion path, and the operating heat can be conducted to the housing via a heat sink or thermal pad within the airborne receiving unit housing.

[0090] In one possible implementation, the intelligent dynamic power regulation circuit can receive rectified stable DC power and, in conjunction with the battery's charging state and health state, output a charging current or charging voltage adapted to the current battery conditions. This circuit can be set in an independent control board, an integrated power board, or an integrated module shared with the rectifier circuit. Its installation position is usually close to the battery interface to reduce the output loop impedance and improve the control response speed.

[0091] The drone charging device for power distribution networks provided in this application includes: a transmitting module mounted on a ground charging platform and a receiving module mounted on the drone to be charged. The transmitting module includes: a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device connected in sequence. The multi-frequency inverter is used to convert the DC power supplied by the ground charging platform into multi-frequency AC power. The compensation circuit is used to perform reactive power compensation on the multi-frequency AC power to obtain compensated multi-frequency AC power. The multi-frequency resonant coupling device is used to perform magnetic resonance coupling on the compensated multi-frequency AC power and transmit the coupled multi-frequency AC power to the receiving module in parallel. The receiving module includes: a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit connected in sequence. The multi-frequency receiving coil is used to perform multi-frequency matching reception on the coupled multi-frequency AC power. The rectifier circuit is used to rectify the coupled multi-frequency AC power into stable DC power. The intelligent dynamic power adjustment circuit is used to determine the battery status of the drone to be charged and adjust the charging power of the stable DC power according to the battery status. The battery status includes: charging status and health status. By applying the technical solution of this application embodiment, the transmitting module achieves adaptation and resonant coupling to different coupling conditions through a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device. The receiving module completes power reception, DC-DC conversion, and charging management through a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit. Since the transmitting side achieves adaptation to different coupling conditions through a multi-frequency inverter and a compensation circuit, and the receiving side completes energy reception, DC-DC conversion, and charging management through a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit, this device can achieve fast charging of drones in a non-contact manner in power distribution network inspection scenarios, and match the charging process with the battery status, so that the system can maintain relatively stable energy transmission and charging control even when there are docking deviations, changes in site conditions, or changes in the external electromagnetic environment.

[0092] Based on the above embodiments, Figure 2 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 2 .like Figure 2 As shown, the compensation circuit includes: an inductor, a capacitor, a resistor, and a compensation controller;

[0093] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0094] 1) An inductor is connected in series in the compensation circuit to filter out high-frequency harmonic noise in multi-band AC power;

[0095] For example, the inductor is arranged in series in the main current channel of the compensation circuit and is electrically connected to the output terminal of the multi-frequency inverter and the input terminal of the multi-frequency resonant coupling device, respectively.

[0096] In one possible implementation, the inductor can be a wire-wound air-core inductor, a ferrite core inductor, or a segmented composite core inductor. The winding material can be copper wire, silver-plated copper wire, or Litz wire to reduce AC losses and adapt to multi-frequency operating conditions.

[0097] The inductance can be set according to the operating frequency and transmission power to ensure sufficient harmonic suppression capability within the target frequency band without excessively limiting effective power transmission. The number of coil turns, wire diameter, and core cross-sectional area of ​​the inductor can be matched according to the rated current and temperature rise requirements.

[0098] 2) The capacitor is connected in parallel with the inductor in the compensation circuit to form a multi-frequency resonant circuit, which is used to match multiple frequency components in the multi-frequency AC power and compensate for reactive power.

[0099] For example, capacitors and inductors are connected in parallel or in a series-parallel combination to form a multi-frequency resonant circuit, and are electrically connected to the main circuit.

[0100] In one possible implementation, the capacitor can be a film capacitor, a ceramic capacitor, or an adjustable capacitor. The dielectric material of the capacitor can be polypropylene, ceramic, or a composite dielectric material to meet the application requirements of higher frequency, larger current, and lower loss.

[0101] The capacitance value, together with the inductance value, usually satisfies the target resonance condition. That is, it is set to the corresponding range according to the operating frequency. The withstand voltage, ripple current capability and package size of a single capacitor can be configured according to the transmission power level of the transmitter module, so that it can withstand the voltage stress under multi-frequency excitation while maintaining a low equivalent series resistance and good thermal stability.

[0102] 3) A resistor is connected in series across the inductor and capacitor to control the current of multi-frequency AC power and prevent circuit overload.

[0103] For example, a resistor is connected in series across the inductor and capacitor to constrain the current waveform of multi-frequency AC power and provide stable current boundary conditions when the compensation controller adjusts the parameters.

[0104] In one possible implementation, the resistor can be a metal film resistor, a wire-wound resistor, or a power resistor.

[0105] The resistance value and rated power of the resistor can be selected based on the operating current, heating conditions and allowable voltage drop. The resistance value range is set to effectively suppress peak current without significantly reducing effective power transmission, so as to ensure operational reliability.

[0106] 4) The compensation controller is connected to the inductor, capacitor and resistor respectively, and is used to control the compensation parameters corresponding to the inductor, capacitor and resistor respectively.

[0107] For example, the compensation controller is connected to an inductor, a capacitor, and a resistor respectively. The corresponding compensation parameters can be changed by means of relay switching, variable capacitor adjustment, digital potentiometer adjustment, or power device control, and a feedback closed loop is formed by sampling voltage, current, phase difference, or resonant point offset.

[0108] In one possible implementation, the compensation controller can be implemented using a microcontroller, a digital signal processing (DSP) controller, or a field-programmable gate array (FPGA) control unit.

[0109] The drone charging device for power distribution networks provided in this application includes a compensation circuit comprising an inductor, a capacitor, a resistor, and a compensation controller. The inductor is connected in series in the compensation circuit to filter out high-frequency harmonic noise in multi-band AC power. The capacitor is connected in parallel in the compensation circuit to form a multi-frequency resonant circuit with the inductor, used to match multiple frequency components in the multi-band AC power and compensate for reactive power. The resistor is connected in series across the inductor and capacitor to control the current of the multi-band AC power and prevent circuit overload. The compensation controller is connected to the inductor, capacitor, and resistor respectively to control the compensation parameters corresponding to the inductor, capacitor, and resistor. Applying the technical solution of this application embodiment, the compensation circuit can effectively improve the quality of transmitted power, enhance reactive power compensation capability, and reduce overload risk in multi-frequency wireless charging scenarios, thereby improving magnetic resonance coupling efficiency and the operational stability of the drone charging device.

[0110] Based on the above embodiments, Figure 3 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 3 .like Figure 3 As shown, the multi-frequency resonant coupling device includes: multiple coupling coils with resonant frequencies;

[0111] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0112] Multiple resonant frequency coupling coils are arranged in a spiral shape to match and magnetically couple multiple frequency components of the compensated multi-band AC power, thereby generating coupled multi-band AC power.

[0113] For example, a multi-frequency resonant coupling device includes multiple coupling coils of resonant frequencies arranged in a spiral pattern, which are spatially opposite to a multi-frequency receiving coil in a receiving module to form a coupling path for electromagnetic energy transfer.

[0114] In one possible implementation, multiple resonant frequency coupling coils can be arranged around the same axis or in a concentric stacked manner to correspond to different operating frequencies.

[0115] Coupled coils with multiple resonant frequencies can be planar spiral coils to obtain a higher number of turns and a more stable magnetic field distribution within a limited area; coupled coils with multiple resonant frequencies can also be three-dimensional spiral coils to adapt to higher power density or stronger spatial magnetic flux diffusion requirements; coupled coils with multiple resonant frequencies can also be double-layered spiral coils to enhance frequency adaptation range and coupling stability.

[0116] In addition, the outer diameter, number of turns, and wire diameter of the coupling coils for multiple resonant frequencies can be set according to the target resonant frequency. Usually, the diameter of the spiral coil is kept close to the diameter of the multi-frequency receiving coil, or it is matched and configured according to a preset coupling ratio. In specific arrangements, the coupling coils for multiple resonant frequencies corresponding to different resonant frequencies can be distinguished by different numbers of turns and coil spacing to avoid frequency crosstalk and improve parallel power transfer capability.

[0117] In one possible implementation, the multi-frequency resonant coupling device does not rely on mechanical motion during operation. Instead, it uses the multi-band AC power output from the multi-frequency inverter and compensation circuit to establish an alternating magnetic field in the coupling coils of multiple resonant frequencies. The corresponding frequency components are resonantly enhanced by the multiple resonant frequency coupling coils arranged in a spiral shape, so that the magnetic flux can more effectively cross the spatial gap between the transmitting module and the receiving module and be induced and acquired by the multi-frequency receiving coil.

[0118] It should be understood that the above examples are for illustrative purposes only and are not intended to be limiting.

[0119] The drone charging device for power distribution networks provided in this application includes a multi-frequency resonant coupling device comprising: multiple coupling coils with resonant frequencies arranged in a spiral configuration, used to respectively match and magnetically couple multiple frequency components of compensated multi-band AC power to generate coupled multi-band AC power. By applying the technical solution of this application, the spiral arrangement of multiple resonant frequency coupling coils allows the magnetic field distribution between the multiple resonant frequency coupling coils to expand progressively along the axial and radial directions, effectively maintaining a relatively stable coupling efficiency, thereby improving the adaptability and stability of power transmission and increasing charging efficiency.

[0120] Based on the above embodiments, Figure 4 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 4 .like Figure 4 As shown, the rectifier circuit includes: a high-efficiency rectifier;

[0121] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0122] The high-efficiency rectifier is connected to the multi-frequency receiving coil and the intelligent dynamic power regulation circuit respectively. It is used to rectify and filter the multi-band AC power transmitted by the multi-frequency receiving coil to obtain stable DC power, and then transmit the stable DC power to the intelligent dynamic power regulation circuit.

[0123] For example, the input terminal of the high-efficiency rectifier is electrically connected to the multi-frequency receiving coil, and the output terminal is electrically connected to the intelligent dynamic power regulation circuit, forming a continuous power supply link from AC reception, DC conversion to power regulation.

[0124] In one possible implementation, the high-efficiency rectifier can adopt a bridge rectification structure to perform full-wave rectification of multi-band AC signals; the high-efficiency rectifier can also adopt a synchronous rectification structure to reduce conduction losses and improve rectification efficiency; the high-efficiency rectifier can also adopt a structure combining full-wave rectification and active filtering to adapt to the energy conversion requirements under the superposition of different frequency components.

[0125] The power devices of a high-efficiency rectifier can be Schottky diodes or metal-oxide-semiconductor field-effect transistors to balance low forward voltage drop, fast switching characteristics, and withstand voltage. Its filtering section can be composed of electrolytic capacitors, film capacitors, or a combination of LC filters to reduce the ripple component after rectification and keep the output voltage within a stable range suitable for the operation of the subsequent regulation circuit.

[0126] In addition, high-efficiency rectifiers are typically mounted inside the housing of the receiver module via a printed circuit board, and their input is electrically connected to the output of the multi-frequency receiver coil via wires, pads or terminals, while their output is connected to the input of the intelligent dynamic power regulation circuit via a power bus.

[0127] The drone charging device for power distribution networks provided in this application includes a rectifier circuit comprising a high-efficiency rectifier connected to a multi-frequency receiving coil and an intelligent dynamic power regulation circuit. The high-efficiency rectifier rectifies and filters the multi-band AC power transmitted from the multi-frequency receiving coil to obtain stable DC power, and then transmits the stable DC power to the intelligent dynamic power regulation circuit. By applying the technical solution of this application, the high-efficiency rectifier effectively converts the multi-band AC power output from the multi-frequency receiving coil into stable DC power, and continuously supplies it to the intelligent dynamic power regulation circuit when output fluctuations are small. This provides a stable input basis for subsequent power allocation based on battery charging and health states, thereby reducing charging discontinuities caused by AC ripple, instantaneous power fluctuations, or changes in coupling conditions, and improving the stability and adaptability of the drone charging process in power distribution network inspection scenarios.

[0128] Based on the above embodiments, Figure 5 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 5 .like Figure 5 As shown, the intelligent dynamic power regulation circuit includes: a microcontroller, a power regulation module, and a sensor;

[0129] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0130] 1) Sensors are used to collect battery data from the drone to be charged and transmit the battery data to the microcontroller;

[0131] The battery data includes: voltage, current, and temperature;

[0132] For example, sensors are used to monitor the battery of a drone to be charged online, collecting battery data including voltage, current, and temperature and transmitting it to a microcontroller.

[0133] In one possible implementation, the sensor can be electrically connected to the battery management port via a wire, or connected to the battery monitoring node via signal sampling, and transmit the analog or digital quantities corresponding to the sampled battery data to the microcontroller.

[0134] 2) The microcontroller is connected to the power regulation module to determine the battery status of the drone to be charged based on the battery data and transmit it to the power regulation module;

[0135] For example, the microcontroller is used to perform calculations and status determination on the battery data, and transmits the determined battery status of the drone to be charged to the power regulation module.

[0136] In one possible implementation, the microcontroller makes a comprehensive judgment on the battery data based on a preset threshold, a preset state determination model, or a charging curve, thereby determining whether the battery is currently in a charging state or a healthy state, and generates corresponding control commands based on the different states and sends them to the power regulation module.

[0137] For example, if data analysis is performed on battery data and abnormal information is identified, such as excessively high temperature or excessively high voltage, the microcontroller can generate corresponding control instructions based on the abnormal information, such as controlling the voltage to decrease or reducing the current.

[0138] 3) Power adjustment module, used to adjust the charging power of stable DC power according to the battery status of the drone to be charged.

[0139] For example, the power regulation module dynamically adjusts the output amplitude, output current, or duty cycle of the stable DC power in the charging circuit based on the battery status of the drone to be charged transmitted by the microcontroller, so as to regulate the charging power.

[0140] In one possible implementation, when the battery of the drone to be charged is in a low state, the power regulation module increases the charging current; when the battery of the drone to be charged is close to its capacity, the power regulation module decreases the charging current to prevent overcharging.

[0141] The drone charging device for power distribution networks provided in this application includes an intelligent dynamic power adjustment circuit comprising a microcontroller, a power adjustment module, and sensors. The sensors collect battery data from the drone to be charged and transmit this data to the microcontroller. The battery data includes voltage, current, and temperature. The microcontroller is connected to the power adjustment module and determines the battery status of the drone based on the battery data, transmitting this information to the power adjustment module. The power adjustment module adjusts the charging power of the stable DC power supply according to the battery status of the drone. By applying the technical solution of this application, automatically adjusting the charging power based on the battery status can effectively improve charging efficiency, stability, and battery lifespan.

[0142] Based on the above embodiments, Figure 6 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 6 .like Figure 6 As shown, the power regulation module includes: a DC-DC converter;

[0143] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0144] A DC-DC converter is used to convert the voltage and current of stable DC power into adjustable output voltage and adjustable output current, respectively, using pulse width modulation.

[0145] For example, the power regulation module includes a DC-DC converter located between the rectifier circuit and the drone battery charging circuit. The input end is connected to the rectified stable DC bus, the control end is electrically connected to the microcontroller, and the output end is connected to the drone battery to be charged via a subsequent protection circuit or directly to form a closed-loop regulation path.

[0146] In one possible implementation, the rectifier circuit first converts the multi-band AC power transmitted from the multi-frequency receiving coil into stable DC power, and then sends the DC power to the DC-DC converter in the power regulation module. Subsequently, the microcontroller determines the charging state and health state of the drone battery to be charged based on the battery voltage, current and temperature data collected by the sensors, and outputs the corresponding pulse width modulation control signal to make the DC-DC converter dynamically change the switching duty cycle. When the duty cycle increases, the output side can obtain a higher charging voltage or current. When the duty cycle decreases, the output power can be reduced, thereby converting the relatively stable DC power on the input side into an adjustable output voltage and adjustable output current suitable for the current battery state.

[0147] When the battery level is low and a higher charging power is allowed, the DC-DC converter can output a higher current to shorten the charging time. When the battery is close to full charge, the temperature is high, or the battery is in poor health, the DC-DC converter reduces the output current and finely converges the output voltage to avoid overcharging, overcurrent, and heat accumulation.

[0148] The drone charging device for power distribution networks provided in this application includes a power regulation module comprising a DC-DC converter. This DC-DC converter is used to convert the voltage and current of stable DC power into adjustable output voltage and adjustable output current using pulse width modulation. By applying the technical solution of this application embodiment, the stable DC power is pulse-width modulated using a DC-DC converter, achieving adjustable stable DC power and effectively improving charging stability.

[0149] Based on the above embodiments, Figure 7 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 7 .like Figure 7 As shown, the receiving module also includes: a user interface;

[0150] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0151] The user interface connects to the microcontroller and is used to display battery data and the battery status of the drone to be charged.

[0152] For example, the user interface is connected to the microcontroller via a wired or wireless communication interface to visualize the battery data collected, calculated, or received by the microcontroller and the battery status of the drone to be charged, so that inspection personnel can intuitively understand the key operating information during the charging process.

[0153] In one possible implementation, the user interface could be a liquid crystal display, a touch screen, or an organic light-emitting diode (OLED) display to show information such as battery voltage, current, temperature, charging stage, and health status.

[0154] The user interface may also include indicator lights and buzzers to alert users through color changes, flashing lights, or sound cues when the battery status is abnormal or charging power is limited.

[0155] In addition, the user interface and the microcontroller can establish a data interaction relationship through serial communication, controller area network (Controller Area Network) communication, Ethernet communication, or wireless communication. After receiving battery data such as voltage, current, and temperature collected by the sensors, the microcontroller combines the results of the charging status and health status judgment and sends the corresponding data display content to the user interface. The user interface then displays the current remaining battery power, charging progress, allowable charging power, temperature change trend, and health assessment results, enabling inspection personnel to promptly determine whether the drone is in a normal charging state and whether the charging strategy needs to be adjusted or manual intervention needs to be performed.

[0156] The drone charging device for power distribution networks provided in this application includes a receiving module further comprising: a user interface connected to a microcontroller for displaying battery data and the battery status of the drone to be charged. By applying the technical solution of this application, the user interface enhances the visualization of the charging process, thereby improving the operability and monitoring of the drone charging device in power distribution network inspection scenarios and avoiding the risk of charging interruption or overcharging due to unavailable information.

[0157] Based on the above embodiments, Figure 8 A schematic diagram of the structure of a drone charging device for a power distribution network provided in this application embodiment. Figure 8 .like Figure 8 As shown, the receiving module also includes: a relay and an overcharge protection circuit;

[0158] The following implementation details are provided for this drone charging equipment used in power distribution networks:

[0159] 1) The relay is connected to the overcharge protection circuit and is used to control the opening and closing of the battery charging circuit of the drone to be charged;

[0160] For example, a relay is typically installed in the charging circuit inside the receiving module and is connected in series with the output of the rectifier circuit, the output of the intelligent dynamic power regulation circuit, and the battery input. The coil or control terminal of the relay is connected to the overcharge protection circuit to receive the action command from the overcharge protection circuit.

[0161] In one possible implementation, the relay can be implemented as an electromagnetic relay, a solid-state relay, or a reed relay. The electromagnetic relay can include a coil, an armature, and contacts. The solid-state relay can be composed of an optocoupler and a power semiconductor. The reed relay can achieve rapid switching through sealed magnetic contacts.

[0162] 2) The overcharge protection circuit is connected to the intelligent dynamic power adjustment circuit. It is used to trigger the relay to cut off the charging current when the battery of the drone to be charged is in the charging state and the battery voltage reaches the preset threshold.

[0163] For example, the overcharge protection circuit is connected to the intelligent dynamic power adjustment circuit. When the intelligent dynamic power adjustment circuit receives the battery status of the drone to be charged as being in a charging state, it further determines that when the battery voltage reaches a preset threshold, it triggers a relay to cut off the charging current.

[0164] Overcharge protection circuits can be composed of comparators, voltage sampling resistor networks, control chips and driving devices, or they can be composed of battery management chips, sampling filter circuits and gate drive circuits.

[0165] In one possible implementation, after the receiving module outputs stable DC power from the rectifier circuit, the intelligent dynamic power adjustment circuit initially adjusts the charging power based on battery data such as battery voltage, current, and temperature. While the relay remains engaged, the charging circuit of the drone's battery is kept in a conducting state, thereby continuously supplying power to the drone's battery. As the charging process progresses, when the intelligent dynamic power adjustment circuit receives a signal indicating that the drone's battery is still charging but the battery voltage has reached a preset threshold, the overcharge protection circuit immediately outputs a cut-off signal to drive the relay to release, switching the charging circuit from conducting to disconnecting, thereby stopping the charging current from continuing to flow into the battery.

[0166] The drone charging device for power distribution networks provided in this application embodiment includes a receiving module further comprising: a relay and an overcharge protection circuit. The relay is connected to the overcharge protection circuit and is used to control the conduction and disconnection of the battery charging circuit of the drone to be charged. The overcharge protection circuit is connected to an intelligent dynamic power adjustment circuit and is used to trigger the relay to cut off the charging current when the battery of the drone to be charged is in a charging state and the battery voltage reaches a preset threshold. By applying the technical solution of this application embodiment, electrical isolation is achieved based on a relay, and overcharge protection is achieved based on an overcharge protection circuit, avoiding continuous overcharging of the battery caused by control delays, sensing errors, or external disturbances. This improves the safety and reliability of the drone fast charging process in power distribution network inspection scenarios.

[0167] Figure 9 This is a schematic flowchart illustrating a method for charging a drone in a power distribution network, as provided in an embodiment of this application. Figure 9 As shown, the drone charging method for power distribution networks is applied to the transmitting module of the aforementioned drone charging equipment for power distribution networks. The method includes the following steps:

[0168] S901 performs multi-frequency resonant conversion on the DC power supply to the ground charging platform to obtain multi-frequency AC power.

[0169] In this step, the DC power supplied by the ground charging platform is processed by multi-frequency resonant conversion to realize the frequency conversion reconstruction of the power form, converting the single constant DC power into multi-band AC power containing multiple frequency components, thus providing the power foundation for subsequent drone charging.

[0170] In one possible implementation, the DC power supply to the ground charging platform can be converted into multi-frequency AC power by a multi-frequency inverter in the launch module of the aforementioned drone charging equipment for power distribution network, according to a preset frequency band.

[0171] S902. Perform reactive power compensation on multi-band AC power to obtain compensated multi-band AC power.

[0172] In this step, reactive power compensation is performed to address potential issues such as harmonic interference, high reactive power loss, and unstable current in multi-band AC power, resulting in a stable output of compensated multi-band AC power.

[0173] In one possible implementation, reactive power compensation for multi-band AC power can be achieved through the compensation circuit in the launch module of the aforementioned drone charging equipment for power distribution networks.

[0174] In one possible implementation, step S902 described above may include the following steps:

[0175] Step 1: Filter out the high-frequency harmonic noise in the multi-band AC power to obtain the filtered multi-band AC power.

[0176] For example, multi-band AC power often carries high-frequency harmonic noise, which needs to be filtered out to avoid interference from high-frequency harmonic noise in subsequent processing.

[0177] In one possible implementation, high-frequency harmonic noise in multi-band AC power can be filtered out by using an inductor connected in series in a compensation circuit.

[0178] Step 2: Match the multiple frequency components in the filtered multi-band AC power, compensate the reactive power corresponding to each frequency component, and obtain the compensated multi-band AC power.

[0179] For example, multiple frequency components in the multi-band AC power after filtering out high-frequency harmonic noise are matched separately, and the reactive power corresponding to each frequency component is compensated, so that different frequency bands can maintain a better impedance state and energy transmission conditions, thereby reducing reactive power loss and heat generation.

[0180] In one possible implementation, a multi-frequency resonant circuit can be formed by connecting a capacitor in parallel with an inductor in series with the compensation circuit, thereby matching multiple frequency components in the multi-band AC power and achieving reactive power compensation.

[0181] S903. Perform magnetic resonance coupling on the compensated multi-band AC power to obtain the target multi-band AC power.

[0182] In this step, the compensated multi-band AC power is processed by magnetic resonance coupling for transmission. Wireless power transmission is achieved through multi-frequency magnetic field resonance coupling, resulting in target multi-band AC power with stable parameters and lower losses.

[0183] In one possible implementation, the multi-frequency resonant coupling device included in the transmitter module of the above-mentioned drone charging equipment for power distribution network can receive compensated multi-band AC power, and excite multiple sets of spirally arranged coupling coils with different resonant frequencies in the multi-frequency resonant coupling device to generate multiple alternating magnetic fields with different resonant frequencies. Based on the principle of multi-frequency resonant coupling, the multiple alternating magnetic fields with different resonant frequencies are coupled in a coordinated manner to obtain the target multi-band AC power.

[0184] The drone charging method for power distribution networks provided in this application is applied to the transmitter module of the aforementioned drone charging equipment for power distribution networks. This method first performs multi-frequency resonant conversion on the DC power supplied by the ground charging platform to obtain multi-band AC power. Then, reactive power compensation is performed on the multi-band AC power to obtain compensated multi-band AC power. Finally, magnetic resonance coupling is performed on the compensated multi-band AC power to obtain the target multi-band AC power. In this embodiment, by performing multi-frequency resonant conversion on the DC power provided by the ground charging platform, multi-band AC power suitable for transmission under different coupling states is formed. Reactive power compensation on the multi-band AC power can effectively reduce the proportion of ineffective power transmission and improve the power transmission matching state, thereby increasing power utilization. The compensated multi-band AC power, after magnetic resonance coupling, forms the target multi-band AC power, enabling stable energy transmission across air gaps, reducing the dependence of contact charging on precise alignment and manual intervention, and achieving rapid charging of the drone.

[0185] Figure 10 This is a schematic diagram of a drone charging device for a power distribution network provided in an embodiment of this application. Figure 10 As shown, the drone charging device 1000 for power distribution networks, applied to the aforementioned drone charging equipment for power distribution networks, includes:

[0186] The conversion module 1001 is used to perform multi-frequency resonant conversion on the DC power supply to the ground charging platform to obtain multi-frequency AC power.

[0187] Compensation module 1002 is used to perform reactive power compensation on multi-frequency AC power to obtain compensated multi-frequency AC power.

[0188] The coupling module 1003 is used to perform magnetic resonance coupling on the compensated multi-band AC power to obtain the target multi-band AC power.

[0189] In one or more embodiments, the compensation module 1002 is specifically used for:

[0190] High-frequency harmonic noise is filtered out from multi-band AC power to obtain filtered multi-band AC power.

[0191] The multiple frequency components in the filtered multi-band AC power are matched, and the reactive power corresponding to each frequency component is compensated to obtain the compensated multi-band AC power.

[0192] The drone charging device for power distribution networks provided in this embodiment can execute the methods provided in the above-described method embodiments. Its implementation principle and technical effects are similar, and will not be described in detail here.

[0193] This application also provides a computer-readable storage medium storing computer instructions that, when executed on a computer, cause the computer to perform the aforementioned related steps.

[0194] The aforementioned computer-readable storage medium can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0195] Optionally, a readable storage medium can be coupled to the processor, enabling the processor to read information from and write information to the readable storage medium. Alternatively, the readable storage medium can be an integral part of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0196] This application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium, and the above steps can be implemented when the at least one processor executes the computer program.

[0197] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A drone charging device for power distribution networks, characterized in that, include: The transmitting module is set on the ground charging platform and the receiving module is set on the drone to be charged; The transmitting module includes: a multi-frequency inverter, a compensation circuit, and a multi-frequency resonant coupling device connected in sequence. The multi-frequency inverter is used to convert the DC power supply from the ground charging platform into multi-frequency AC power. The compensation circuit is used to perform reactive power compensation on the multi-frequency AC power to obtain compensated multi-frequency AC power. The multi-frequency resonant coupling device is used to perform magnetic resonant coupling on the compensated multi-frequency AC power and transmit the coupled multi-frequency AC power to the receiving module in parallel. The receiving module includes: a multi-frequency receiving coil, a rectifier circuit, and an intelligent dynamic power adjustment circuit connected in sequence. The multi-frequency receiving coil is used to perform multi-frequency matching reception of the coupled multi-frequency AC power. The rectifier circuit is used to rectify the coupled multi-frequency AC power into stable DC power. The intelligent dynamic power adjustment circuit is used to determine the battery status of the drone to be charged and adjust the charging power of the stable DC power according to the battery status. The battery status includes: charging status and health status.

2. The drone charging device according to claim 1, characterized in that, The compensation circuit includes: an inductor, a capacitor, a resistor, and a compensation controller; The inductor is connected in series in the compensation circuit to filter out high-frequency harmonic noise in the multi-band AC power. The capacitor is connected in parallel in the compensation circuit to form a multi-frequency resonant circuit with the inductor, which is used to match multiple frequency components in the multi-frequency AC power and compensate for reactive power. The resistor is connected in series across the inductor and the capacitor to control the current of the multi-band AC power and prevent circuit overload. The compensation controller is connected to the inductor, the capacitor, and the resistor respectively, and is used to control the compensation parameters corresponding to the inductor, the capacitor, and the resistor respectively.

3. The drone charging device according to claim 1 or 2, characterized in that, The multi-frequency resonant coupling device includes: multiple coupling coils with resonant frequencies; The multiple resonant frequency coupling coils are arranged in a spiral shape to match the multiple frequency components of the compensated multi-band AC power and perform magnetic resonance coupling to generate the coupled multi-band AC power.

4. The drone charging device according to claim 1, characterized in that, The rectifier circuit includes: a high-efficiency rectifier; The high-efficiency rectifier is connected to the multi-frequency receiving coil and the intelligent dynamic power regulation circuit, respectively, and is used to rectify and filter the multi-band AC power transmitted by the multi-frequency receiving coil to obtain the stable DC power, and transmit the stable DC power to the intelligent dynamic power regulation circuit.

5. The drone charging device according to claim 1 or 2, characterized in that, The intelligent dynamic power regulation circuit includes: a microcontroller, a power regulation module, and a sensor; The sensor is used to collect battery data of the drone to be charged and transmit the battery data to the microcontroller. The battery data includes voltage, current, and temperature. The microcontroller is connected to the power regulation module and is used to determine the battery status of the drone to be charged based on the battery data and transmit it to the power regulation module. The power adjustment module is used to adjust the charging power of the stable DC power according to the battery status of the drone to be charged.

6. The drone charging device according to claim 5, characterized in that, The power regulation module includes: a DC-DC converter; The DC-DC converter is used to convert the voltage and current of the stable DC power into an adjustable output voltage and an adjustable output current, respectively, using pulse width modulation.

7. The drone charging device according to claim 5, characterized in that, The receiving module further includes: a user interface; The user interface is connected to the microcontroller and is used to display the battery data and the battery status of the drone to be charged.

8. The drone charging device according to claim 1 or 2, characterized in that, The receiving module also includes: a relay and an overcharge protection circuit; The relay is connected to the overcharge protection circuit and is used to control the on and off of the battery charging circuit of the drone to be charged. The overcharge protection circuit is connected to the intelligent dynamic power adjustment circuit and is used to trigger a relay to cut off the charging current when the battery of the drone to be charged is in a charging state and the battery voltage reaches a preset threshold.

9. A method for charging unmanned aerial vehicles (UAVs) in a power distribution network, characterized in that, The method, applied to the transmitting module in the UAV charging device for power distribution networks as described in claims 1-8, comprises: The DC power supply to the ground charging platform is converted into multi-frequency AC power through multi-frequency resonant conversion. Reactive power compensation is performed on the multi-band AC power to obtain compensated multi-band AC power. The compensated multi-band AC power is magnetically coupled to obtain the target multi-band AC power.

10. The method according to claim 9, characterized in that, The reactive power compensation of the multi-band AC power to obtain compensated multi-band AC power includes: High-frequency harmonic noise in the multi-band AC power is filtered out to obtain filtered multi-band AC power. The multiple frequency components in the filtered multi-band AC power are matched, and the reactive power corresponding to each frequency component is compensated to obtain the compensated multi-band AC power.

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