Power transmission line energy taking management method and device

Abstract

The invention discloses a power transmission line energy taking management method and device, and the method comprises the steps: keeping a switch of an energy collector in an off state before the voltage of an energy storage capacitor does not reach a first preset voltage, and controlling the switch of the energy collector to be activated when the voltage reaches the first preset voltage, and when the voltage of the energy storage capacitor rises to the working voltage range of the micro-control unit, the micro-control unit is controlled to be activated, and the system is started smoothly. The method comprises the steps that after the energy management system is powered on, the voltage of an energy storage capacitor is acquired; judging whether the voltage of the energy storage capacitor is greater than a first preset voltage; if the voltage is smaller than the first preset voltage, controlling a switch of the energy collector to keep an off state; if not, controlling a switch of the energy collector to be activated; and when the voltage of the energy storage capacitor rises to the working voltage range of the micro-control unit, the micro-control unit is controlled to be activated, so that an initialization program and an energy management task are executed.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission lines, and in particular to a method and device for managing power extraction of power transmission lines. Background Art

[0002] Transmission line energy harvesting is an emerging technology that aims to collect energy from high-voltage transmission lines for use by sensing end loads. Although this technology has the potential to reduce energy waste and provide an additional source of energy.

[0003] However, existing energy management technologies have the following drawbacks: Difficulty in system startup: In the absence of an external power source, cold starting of a self-powered system can be a challenge, especially when the energy storage element is not fully charged.

[0004] Therefore, how to better manage the energy extraction of transmission lines has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the present invention provides a management method and device for energy extraction from a transmission line. In the method, before the voltage of the energy storage capacitor reaches a first preset voltage, the switch of the energy collector remains in a closed state. When the first preset voltage is reached, the switch of the energy collector is controlled to be activated. When the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated, thereby starting the system smoothly.

[0006] According to one aspect of the present invention, a method for managing energy extraction of a transmission line is provided, which is applied to an energy management system, and the method comprises:

[0007] After the energy management system is powered on, obtaining the voltage of the energy storage capacitor in the energy management system;

[0008] Determining whether the voltage of the energy storage capacitor is greater than a first preset voltage;

[0009] If the voltage is less than the first preset voltage, controlling the switch of the energy collector in the energy management system to remain in a closed state;

[0010] If it is not less than the first preset voltage, controlling the switch of the energy collector to activate so that the energy collector is activated, and supplying the energy storage capacitor to charge and the microcontroller unit in the energy management system after converting the energy collected by the energy collector into direct current through the energy conversion device;

[0011] When the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated so as to execute the initialization program and energy management tasks.

[0012] In some embodiments, the energy collected by the energy collector is alternating current, and the energy conversion device includes a full-bridge rectifier; the step of converting the energy into direct current by the energy conversion device includes:

[0013] The alternating current collected by the energy collector is converted into direct current through the full-bridge rectifier.

[0014] In some embodiments, the energy collector is a current transformer magnetic energy collector, the current transformer magnetic energy collector comprising an AC current conductor and a magnetic core with a secondary winding clamped around the AC current conductor; the steps of performing the energy management task include:

[0015] Controlling the secondary winding to be short-circuited in a non-controlled state;

[0016] During a preset period of input current, when the conduction window of the secondary winding is aligned with the input current peak, the short circuit is removed to saturate the magnetic core around the current peak, maximizing the energy harvesting of the current transformer magnetic energy harvester.

[0017] In some embodiments, the method for determining the conduction window of the secondary winding includes:

[0018] The position of the conduction window is updated according to the voltage and current data of the energy storage capacitor.

[0019] In some embodiments, performing the energy management task further comprises:

[0020] Determining whether the voltage of the energy storage capacitor exceeds a safe voltage value range;

[0021] If the safety voltage value range is exceeded, the load is controlled to be turned off;

[0022] When the voltage of the energy storage capacitor returns to the safe voltage value range, the load is controlled to turn on.

[0023] In some embodiments, performing the energy management task further comprises:

[0024] When the voltage of the energy storage capacitor exceeds a second preset voltage, the secondary winding of the energy collector is short-circuited.

[0025] In some embodiments, performing the energy management task further comprises:

[0026] When the voltage of the energy storage capacitor exceeds a third preset voltage, the DC-DC converter is enabled by the micro control unit to supply power to the load.

[0027] According to another aspect of the present invention, there is provided a management device for energy extraction of a transmission line, comprising:

[0028] An acquisition unit, used to acquire the voltage of the energy storage capacitor in the energy management system after the energy management system is powered on;

[0029] A judging unit, used to judge whether the voltage of the energy storage capacitor is greater than a first preset voltage;

[0030] A first control unit, configured to control a switch of an energy collector in the energy management system to remain in a closed state if the voltage is less than a first preset voltage;

[0031] The second control unit is used to control the activation of the switch of the energy collector if the voltage is not less than the first preset voltage, so as to activate the energy collector, and supply the energy storage capacitor for charging and the micro control unit in the energy management system after converting the energy collected by the energy collector into direct current through the energy conversion device.

[0032] According to another aspect of the present invention, a storage medium is provided, wherein the storage medium stores at least one executable instruction, and the executable instruction enables a processor to execute the method for managing energy extraction of a transmission line as described above.

[0033] According to another aspect of the present invention, there is provided a terminal, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0034] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the management method for energy extraction of the electric transmission line as described.

[0035] The present invention provides a management method and device for energy extraction of a transmission line. In the method, before the voltage of the energy storage capacitor reaches a first preset voltage, the switch of the energy collector remains in a closed state. When the first preset voltage is reached, the switch of the energy collector is controlled to be activated, and when the voltage of the energy storage capacitor rises to the working voltage range of the micro control unit, the micro control unit is controlled to be activated to start the system smoothly. The method includes: after the energy management system is powered on, the voltage of the energy storage capacitor is obtained; it is determined whether the voltage of the energy storage capacitor is greater than the first preset voltage; if it is less than the first preset voltage, the switch of the energy collector is controlled to remain in a closed state; if it is not less than the first preset voltage, the switch of the energy collector is controlled to be activated to activate the energy collector, and the energy collected by the energy collector is converted into direct current through an energy conversion device to supply the energy storage capacitor to charge and the micro control unit; when the voltage of the energy storage capacitor rises to the working voltage range of the micro control unit, the micro control unit is controlled to be activated to execute the initialization program and energy management tasks.

[0036] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A flowchart of a method for managing energy extraction of a power transmission line provided in accordance with some embodiments is exemplarily shown;

[0039] Figure 2 A schematic diagram of the structure of a management device for energy extraction of a power transmission line provided in accordance with some embodiments is exemplarily shown;

[0040] Figure 3 A schematic diagram of the structure of a terminal provided according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0042] In addition to the defects of difficult system startup, existing energy management technologies also include: low energy conversion efficiency. Traditional energy harvesters and energy conversion devices are often inefficient, resulting in a large amount of energy loss during the conversion process. Poor environmental adaptability. Many energy harvesting systems are sensitive to environmental conditions (such as temperature, humidity, and light intensity), which limits performance and reliability. Limited energy storage capacity. The capacity of energy storage elements (such as batteries or supercapacitors) is limited and may not be able to support the operation of sensor nodes for a long time, especially when energy harvesting is unstable. Lack of effective energy management strategies. Many systems lack advanced energy management strategies, resulting in low energy harvesting efficiency. Insufficient overvoltage and overcurrent protection. In the case of excess energy harvesting, the system may suffer from overvoltage damage, and existing protection measures may not be sufficient to cope with these situations. Difficult maintenance and replacement. Since many energy harvesting systems are deployed in difficult-to-reach locations, maintaining and replacing energy storage elements may be expensive and inconvenient.

[0043] In order to solve the above technical problems, the embodiments of the present application provide a management method, device, storage medium and terminal for energy extraction from a transmission line. In the method, before the voltage of the energy storage capacitor reaches a first preset voltage, the switch of the energy collector remains in a closed state. When the first preset voltage is reached, the switch of the energy collector is controlled to be activated. When the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated to start the system smoothly.

[0044] Figure 1 A flow chart of a method for managing energy extraction of a power transmission line according to some embodiments is exemplarily shown, and the method includes S100-S500.

[0045] In some embodiments, the method is applied to an energy management system, which is an energy management interface connecting an energy acquisition module and a sensing system. The energy management interface is generally applicable to a self-powered sensing terminal system for a transmission line, and the energy management interface includes a dynamically controlled rectifier circuit, a DC voltage and current sensing circuit, and an algorithm and an overvoltage protection circuit for energy enhancement. The input end of the energy management interface is an energy collector, i.e., an energy acquisition module, and the output end of the energy management interface is a sensing terminal. The energy acquisition module is composed of hundreds of turns of coils wound around a magnetic core skeleton, and generates an induced voltage through the principle of electromagnetic induction.

[0046] S100: After the energy management system is powered on, obtain the voltage of the energy storage capacitor in the energy management system.

[0047] The energy management system includes an energy collector, an energy conversion device, a storage capacitor and a sensor node. In the embodiment of the present application, the energy management system uses an energy storage capacitor to store energy, which is a key component for providing necessary power before the energy collector starts working.

[0048] In some embodiments, the energy storage capacitor may include one or more large-capacity supercapacitors. Supercapacitors have high energy density and fast charge and discharge capabilities, are suitable for energy collection, and solve the problem of limited energy storage capacity in existing methods.

[0049] S200: Determine whether the voltage of the energy storage capacitor is greater than a first preset voltage.

[0050] In an embodiment of the present application, during the system startup phase, an ultra-low power discrete logic circuit is used to limit energy consumption. The logic circuit ensures that when the energy storage capacitor is charged to a sufficient voltage level, that is, the first preset voltage, the downstream circuit will not be activated, that is, the energy collector will not be started.

[0051] In some embodiments, a voltage comparator may be used to obtain the voltage of the energy storage capacitor and determine whether the voltage of the energy storage capacitor is greater than a first preset voltage. Exemplarily, the first preset voltage is 3V.

[0052] S300: If the voltage is less than a first preset voltage, control the switch of the energy collector in the energy management system to remain in a closed state.

[0053] In the embodiment of the present application, when the acquired voltage of the energy storage capacitor does not reach the first preset voltage, the control system remains in a dormant state to consume the least energy.

[0054] S400. If it is not less than a first preset voltage, control the switch activation of the energy collector to activate the energy collector, and after converting the energy collected by the energy collector into direct current through an energy conversion device, supply it to the microcontroller unit in the energy storage capacitor charging and energy management system.

[0055] The switch of the energy collector is a MOSFET (metal-oxide semiconductor field effect transistor) switch. The energy conversion device includes a full-bridge rectifier, and the energy collected by the energy collector is alternating current.

[0056] The step of converting the energy into direct current by the energy conversion device comprises: converting the alternating current collected by the energy collector into direct current by the full-bridge rectifier.

[0057] In some embodiments, a full-bridge rectifier with actively controlled MOSFET switches is also used to further improve rectification efficiency.

[0058] In the embodiment of the present application, the voltage of the energy storage capacitor gradually rises after the system is powered on, and when the voltage of the energy storage capacitor reaches a first preset voltage, the mosfet switch is activated, that is, the switch controlling the energy collector is activated; the full-bridge rectifier is activated, that is, the energy collector is activated. At this time, the mosfet switch is turned on, the full-bridge rectifier starts to work, and the AC power collected by the energy collector is converted into DC power through the energy conversion device, which is supplied to the energy storage capacitor and the microcontroller unit (MCU), wherein the microcontroller unit is a part of the energy management system, which is used to execute the system initialization program and energy management tasks.

[0059] S500: When the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated so as to execute an initialization program and energy management tasks.

[0060] In the embodiment of the present application, when the voltage of the energy storage capacitor further increases to the operating voltage range of the micro control unit, the micro control unit is activated and starts to execute the initialization program and energy management tasks.

[0061] The system enters normal operation, and the microcontroller unit takes over the control of the energy management system and performs energy management as needed.

[0062] In the method in the embodiment of the present application, before the voltage of the energy storage capacitor reaches the first preset voltage, the switch of the energy collector remains in a closed state. When the first preset voltage is reached, the switch of the energy collector is controlled to be activated, and when the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated, and the system is started smoothly, thereby solving the problem of difficult system startup in the existing method.

[0063] In some embodiments, the energy collector is a current transformer magnetic energy collector, the current transformer magnetic energy collector comprising an AC current conductor and a magnetic core with a secondary winding clamped around the AC current conductor; the steps of performing the energy management task include:

[0064] The secondary winding is controlled to be short-circuited in a non-controlled state.

[0065] In the embodiment of the present application, the non-controlled state means that the magnetic core is not saturated.

[0066] During a preset period of input current, when the conduction window of the secondary winding is aligned with the input current peak, the short circuit is removed to saturate the magnetic core around the current peak, maximizing the energy harvesting of the current transformer magnetic energy harvester.

[0067] In the embodiment of the present application, the preset period may be a half period or a whole period.

[0068] Specifically, the above process uses the maximum power point tracking (MPPT) algorithm, specifically the transfer window alignment method, to optimize the power output of the energy harvester. The MPPT algorithm can enable the energy harvester to always operate at the maximum power point under changing environmental conditions. This method optimizes the power output of the energy harvester by actively controlling the core saturation state. In each preset cycle, the system automatically calculates and updates the position of the conduction window to ensure that the energy harvester is turned on near the peak of the input current, thereby maximizing energy harvesting.

[0069] In the embodiments of the present application, the purpose of enhancing energy collection can be achieved. By actively controlling the saturation state of the magnetic core, the system can turn on the energy collector near the peak value of the input current, thereby significantly improving the energy collection efficiency, solving the problems of low energy conversion efficiency and large amount of energy loss during the conversion process in the existing methods, and at the same time improving environmental adaptability.

[0070] In some embodiments, the method for determining the conduction window of the secondary winding includes: updating the position of the conduction window according to the voltage and current data of the energy storage capacitor.

[0071] In an embodiment of the present application, the power output of the energy harvester can be optimized under changing environmental conditions. Specifically, the microcontroller unit uses an internal comparator to detect the conduction state of the full-bridge rectifier, and updates the position of the conduction window according to the sampled voltage and circuit data. Exemplarily, the microcontroller unit uses an internal analog-to-digital converter (ADC) to sample the voltage and current data of the energy storage capacitor in real time, and uses an accumulator to calculate the total energy collected during the conduction window. Based on the total energy collected, the microcontroller unit updates the length of the secondary winding short-circuit period to maximize energy collection in the next conduction period. In an embodiment of the present application, the purpose of real-time monitoring and adjustment can be achieved, and the system monitors the voltage and current of the energy storage capacitor and the performance of the energy harvester in real time. Based on real-time data, the system dynamically adjusts the maximum power point tracking algorithm and the energy allocation strategy to adapt to the changing environmental conditions and energy harvester performance.

[0072] In some embodiments, performing the energy management task further comprises:

[0073] Determining whether the voltage of the energy storage capacitor exceeds a safe voltage value range;

[0074] If the safety voltage value range is exceeded, the load is controlled to be turned off;

[0075] In the embodiment of the present application, the load is a sensor node.

[0076] When the voltage of the energy storage capacitor returns to the safe voltage value range, the load is controlled to turn on.

[0077] The above process can also be called a hysteresis control method, which regulates the voltage of the energy storage capacitor to ensure that the voltage remains within a safe operating range (i.e., a safe voltage range, such as 7 to 8 V). This method is achieved by turning off the load when the voltage is too high and turning the load back on when the voltage drops to a safe level.

[0078] In some embodiments, performing the energy management task further comprises:

[0079] When the voltage of the energy storage capacitor exceeds a second preset voltage, the secondary winding of the energy collector is short-circuited.

[0080] In the embodiment of the present application, dynamic circuit protection is implemented. In order to prevent the energy storage capacitor from overvoltage under high energy collection conditions, the system implements a dynamic circuit protection mechanism. When the voltage is detected to exceed the second preset voltage, exemplarily 10V, the system will short-circuit the secondary winding of the energy harvester to protect the energy storage capacitor and sensitive integrated circuits.

[0081] In some embodiments, the system uses a microcontroller to monitor the voltage of the energy storage capacitor. When the voltage exceeds a second preset voltage, the microcontroller activates the switch of the energy harvester and short-circuits the secondary winding of the energy harvester to prevent the voltage from further rising and possibly damaging system components, thereby reducing replacement and maintenance.

[0082] In some embodiments, performing the energy management task further comprises:

[0083] When the voltage of the energy storage capacitor exceeds a third preset voltage, the DC-DC converter is enabled by the micro control unit to supply power to the load.

[0084] In the embodiment of the present application, a load service is provided, and the system uses a microcontroller to regulate the transmission of energy from the energy storage capacitor to the wireless sensor node. The microcontroller enables or disables the DC-DC converter according to a preset voltage threshold (i.e., the third preset voltage), thereby controlling the power supply of the sensor node.

[0085] In the embodiment of the present application, the microcontroller enables or disables the DC-DC converter according to the voltage level of the energy storage capacitor, thereby controlling the power supply of the sensor node.

[0086] In some embodiments, the purpose of system state management can be achieved by using a state machine to manage different operation stages, including cold start, energy harvesting enhancement, overvoltage protection, and sensing terminal load service. The state machine switches the operation mode according to the voltage level of the energy storage capacitor and the energy demand of the system.

[0087] The method in the embodiment of the present application can improve energy conversion efficiency, enhance the system's adaptability to environmental changes, provide an effective energy management strategy, and ensure the reliability and long-term operation of the system. Through these improvements, the research hopes to provide a more efficient, reliable and economically feasible energy management solution for the self-powered sensing terminal system.

[0088] The embodiments of the present application solve the energy management problem in the self-powered sensing terminal system of the transmission line. Specifically, the present application studies how to effectively manage the energy flow from the energy collector to the sensor load, especially when there is a difference between the output voltage of the energy collector and the required operating power. The present application is applicable to any self-powered sensing terminal system, and the application prospects can be further expanded.

[0089] The embodiment of the present application provides a method for managing energy extraction from a transmission line, in which the switch of the energy collector remains closed before the voltage of the energy storage capacitor reaches a first preset voltage, and the switch of the energy collector is controlled to be activated when the first preset voltage is reached, and when the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated, and the system is started smoothly. .

[0090] Furthermore, as a response to the above Figure 1 The embodiment of the present invention provides a management device for energy extraction of a transmission line, such as Figure 2 As shown, including:

[0091] An acquisition unit 201 is used to acquire the voltage of the energy storage capacitor in the energy management system after the energy management system is powered on;

[0092] A judging unit 202, used to judge whether the voltage of the energy storage capacitor is greater than a first preset voltage;

[0093] A first control unit, configured to control a switch of an energy collector in the energy management system to remain in a closed state if the voltage is less than a first preset voltage;

[0094] The second control unit 203 is used to control the switch activation of the energy collector if the voltage is not less than the first preset voltage, so as to activate the energy collector, and supply the energy collected by the energy collector to the energy storage capacitor for charging and the micro control unit in the energy management system after converting the energy collected by the energy collector into direct current through the energy conversion device;

[0095] The third control unit 204 is used to control the micro control unit to activate when the voltage of the energy storage capacitor rises to the working voltage range of the micro control unit, so as to execute the initialization program and energy management tasks.

[0096] According to an embodiment of the present invention, a storage medium is provided, wherein the storage medium stores at least one executable instruction, and the computer executable instruction can execute the method for managing power supply of a transmission line in any of the above method embodiments.

[0097] Figure 3 A schematic diagram of the structure of a terminal provided according to an embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the terminal.

[0098] like Figure 3 As shown, the terminal may include: a processor (processor) 402 , a communication interface (Communications Interface) 404 , a memory (memory) 406 , and a communication bus 408 .

[0099] The processor 402 , the communication interface 404 , and the memory 406 communicate with each other via a communication bus 408 .

[0100] The communication interface 404 is used to communicate with other devices such as clients or other servers.

[0101] The processor 402 is used to execute the program 410, and specifically can execute the relevant steps in the above-mentioned management method embodiment of the power transmission line energy extraction.

[0102] Specifically, the program 410 may include program codes, which include computer operation instructions.

[0103] The processor 402 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the terminal may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0104] The memory 406 is used to store the program 410. The memory 406 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0105] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for managing energy extraction of a transmission line, characterized in that: Applied to an energy management system, the method comprises: After the energy management system is powered on, obtaining the voltage of the energy storage capacitor in the energy management system; Determining whether the voltage of the energy storage capacitor is greater than a first preset voltage; If the voltage is less than the first preset voltage, controlling the switch of the energy collector in the energy management system to remain in a closed state; If it is not less than the first preset voltage, controlling the switch of the energy collector to activate so that the energy collector is activated, and supplying the energy storage capacitor to charge and the microcontroller unit in the energy management system after converting the energy collected by the energy collector into direct current through the energy conversion device; When the voltage of the energy storage capacitor rises to the operating voltage range of the micro control unit, the micro control unit is controlled to be activated so as to execute the initialization program and energy management tasks.

2. The method according to claim 1, characterized in that The energy collected by the energy collector is alternating current, and the energy conversion device includes a full-bridge rectifier; the step of converting the energy into direct current by the energy conversion device includes: The alternating current collected by the energy collector is converted into direct current through the full-bridge rectifier.

3. The method according to claim 1, characterized in that The energy collector is a current transformer magnetic energy collector, which includes an AC current conductor and a magnetic core with a secondary winding clamped around the AC current conductor; The steps of performing the energy management task include: Controlling the secondary winding to be short-circuited in a non-controlled state; During a preset period of input current, when the conduction window of the secondary winding is aligned with the input current peak, the short circuit is removed to saturate the magnetic core around the current peak, maximizing the energy harvesting of the current transformer magnetic energy harvester.

4. The method according to claim 3, characterized in that The method for determining the conduction window of the secondary winding includes: The position of the conduction window is updated according to the voltage and current data of the energy storage capacitor.

5. The method according to claim 3, characterized in that: Executing the energy management task also includes: Determining whether the voltage of the energy storage capacitor exceeds a safe voltage value range; If the safety voltage value range is exceeded, the load is controlled to be turned off; When the voltage of the energy storage capacitor returns to the safe voltage value range, the load is controlled to turn on.

6. The method according to claim 5, characterized in that Executing the energy management task also includes: When the voltage of the energy storage capacitor exceeds a second preset voltage, the secondary winding of the energy collector is short-circuited.

7. The method according to claim 6, characterized in that Executing the energy management task also includes: When the voltage of the energy storage capacitor exceeds a third preset voltage, the DC-DC converter is enabled by the micro control unit to supply power to the load.

8. A management device for energy extraction of a transmission line, characterized in that: include: An acquisition unit, used to acquire the voltage of the energy storage capacitor in the energy management system after the energy management system is powered on; A judging unit, used to judge whether the voltage of the energy storage capacitor is greater than a first preset voltage; A first control unit, configured to control a switch of an energy collector in the energy management system to remain in a closed state if the voltage is less than a first preset voltage; A second control unit is used to control the switch activation of the energy collector if the voltage is not less than the first preset voltage, so that the energy collector is activated, and after the energy collected by the energy collector is converted into direct current through the energy conversion device, the energy is supplied to the energy storage capacitor for charging and the micro control unit in the energy management system; The third control unit is used to control the micro control unit to activate when the voltage of the energy storage capacitor rises to the working voltage range of the micro control unit, so as to execute the initialization program and energy management tasks.

9. A storage medium, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute the method for managing energy extraction of a transmission line according to any one of claims 1 to 7.

10. A terminal, comprising: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the method for managing energy extraction from an electric transmission line as described in any one of claims 1-7.

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