High-power CT electricity taking intelligent device and system, control method and medium

Abstract

The invention relates to the technical field of high-voltage electricity taking, in particular to a high-power CT electricity taking intelligent device and system, a control method and a medium, and mainly comprises a CT electricity taking module, a public mother board and a structural shell. Calculating the current output maximum power according to bus current data collected by a sensor; obtaining the current load power, and judging whether the load power is matched with the maximum output power or not; if not, the current load power is adjusted, and if yes, the current output current of each CT module in the current CT electricity taking intelligent device is obtained, so that the output power of each CT module is consistent. The resonance compensation circuit is additionally arranged, the effective working current range of CT electricity taking can be widened, the small-current electricity taking capacity is improved, and the stability and safety of the device can be improved through the discharge and protection unit.

Description

Technical Field

[0001] This invention relates to the field of high-voltage power extraction technology, and more specifically, to a high-power CT power extraction intelligent device and system, control method, and medium. Background Technology

[0002] With the rapid development of smart grids and the Internet of Things in the power sector, online monitoring systems for high-voltage transmission lines (such as conductor temperature monitoring, icing monitoring, video surveillance, and fault location) are becoming increasingly widespread. Providing these devices with a stable power supply over a long period is a key challenge for their reliable operation. Traditional power supply methods, such as battery power and solar power, suffer from limited endurance, susceptibility to weather conditions, and high maintenance costs. Therefore, current transformer (CT) power extraction technology based on the principle of electromagnetic induction is widely used for power extraction in high-voltage lines. This technology utilizes conductor current to induce electrical energy through an iron-core current transformer, providing a continuous power supply to the equipment. It offers advantages such as requiring no external power supply and high reliability.

[0003] However, existing CT power supply devices still have the following prominent problems in practical applications: (1) Limited power supply: Traditional CT power supply devices have insufficient output power (usually in the W level), which is difficult to meet the power supply requirements of high-power devices (such as high-definition cameras, wireless communication modules, etc. in the tens of watt level). (2) Fixed structure and poor adaptability: Existing devices are mostly integral structures, which are difficult to adapt to different current levels. Once a component is damaged, the whole device needs to be replaced, resulting in high maintenance costs. (3) Insufficient expandability: Power supply modules cannot be flexibly added or removed according to the load power requirements. There is a lack of modular design, making it difficult to achieve power configuration on demand. (4) Mismatch between bus current and load power: Traditional CT power supply devices often face the problem that the load requires a large power consumption and cannot work normally under low bus current conditions (such as at night or under light load). Under high bus current conditions, the load requires a small power consumption and wastes excess power supply energy. The power mismatch leads to low power utilization.

[0004] Therefore, there is an urgent need for a new type of CT power supply device that can achieve high power, wide current range, safe and intelligent operation, and easy maintenance. Summary of the Invention

[0005] The purpose of this invention is to provide a high-power CT power supply intelligent device and system, control method, and medium to solve the above-mentioned problems in the prior art.

[0006] This invention is achieved through the following technical solution: In a first aspect, the present invention provides a system control method for a high-power CT power supply intelligent device, comprising: Obtain bus current data and calculate the current maximum output power based on the bus current data; Obtain the current load power and determine whether the load power matches the maximum output power; If they do not match, adjust the current load power; if they match, obtain the current data output by each CT module in the current CT power supply intelligent device. The output power of each CT module is calculated based on the current data output by each CT module. It is then determined whether the output power of each CT module is consistent. If they are consistent, the output is maintained. If they are inconsistent, the abnormal CT module is selected for adjustment.

[0007] Preferably, adjusting the current load power includes: If the current maximum output power is greater than the load power, a control signal is issued to start energy storage charging or several load devices. If the current maximum output power is less than or equal to the load power, a control signal is issued to shut down several load devices.

[0008] Preferably, the method for determining consistency and inconsistency includes: Set a first judgment threshold for output power, and determine whether the difference in output power between each CT module is greater than the corresponding first judgment threshold; If it is greater than, it is considered inconsistent; if it is less than or equal to, it is considered consistent.

[0009] Preferably, the step of selecting and adjusting the abnormal CT module includes: Obtain the temperature and voltage data of the currently abnormal CT module, obtain the difference between the temperature and voltage data and the temperature and voltage data of the normal CT module, and set the second judgment threshold for the temperature and voltage data respectively. If the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, the corresponding fault type will be output and the first control signal for adjustment will be issued. If there is no situation where the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, then an adjustment second control signal is issued.

[0010] Secondly, the present invention also provides a system for a high-power CT power supply intelligent device, comprising a plurality of CT modules and a common motherboard, wherein the common motherboard is connected to the plurality of CT modules; The common motherboard is used to execute the system control method of the above-mentioned high-power CT power supply intelligent device.

[0011] Preferably, the CT module includes an energy harvesting magnetic core, a coupling coil, and a lightning protection module, a resonant module, a discharge module, a rectifier module, a power conversion module, an output protection module connected in sequence, as well as a control module connected to the discharge module and the power conversion module.

[0012] Preferably, the common motherboard includes a plurality of interactive modules, a current sharing control module, a switch module and an output interface connected in sequence, as well as a wireless communication module connected to the current sharing control module; The plurality of interactive modules are connected to the output protection modules of the plurality of CT modules, and the output interface is connected to an external load.

[0013] Thirdly, the present invention also provides a high-power CT power-harvesting intelligent device, including the system of the above-mentioned high-power CT power-harvesting intelligent device, and further including a housing, a bus current detection sensor and several CT modules disposed inside the housing, wherein the bus current detection sensor is arranged in parallel with the CT modules, and the bus current detection sensor and the CT modules are used for the bus to pass through its interior to acquire and collect electrical energy, and both ends of the housing are provided with housing end caps, wherein one of the housing end caps is provided with an output terminal.

[0014] Preferably, the outer shell includes a plurality of connectable extended outer shells, and the plurality of extended outer shells are embedded and connected.

[0015] Fourthly, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the system control method for a high-power CT power-supply intelligent device as described above.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: The method provided by this invention mainly includes: obtaining bus current data; calculating the current maximum output power based on the bus current data; obtaining the current load power; determining whether the load power matches the maximum output power; if they do not match, adjusting the current load power; if they match, obtaining the current data output by each CT module in the current CT power-taking intelligent device. Through modular core and coil design, flexible addition and reduction of module numbers, and integration of various sensors and dynamic power adjustment mechanisms, the aforementioned technical problems are effectively solved, improving power taking and energy utilization efficiency. Simultaneously, the addition of a resonant compensation circuit broadens the effective operating current range of CT power taking, enhances low-current power taking capability, and the discharge and protection units improve the stability and safety of the device. The dynamic power adjustment mechanism can match the bus current and load power, ensuring efficient utilization of power taking. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the process of the present invention; Figure 2 This is a schematic diagram of the system structure of the present invention. Figure 3 This is a schematic diagram of the overall structure of the present invention.

[0019] Icons: 1-Busbar, 2-House, 3-Busbar current detection sensor, 4-CT module, 5-Motherboard, 6-Extension housing, 7-Output terminal, 8-House end cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] The module division in this application is a logical division. In actual application, there may be other division methods. For example, multiple modules may be combined into or integrated into another system, or some features may be ignored or not executed.

[0022] The independently described modules or sub-modules may or may not be physically separated; they may be implemented in software or hardware, and some modules or sub-modules may be implemented in software, with the processor calling the software to implement the function of these modules or sub-modules, while other modules or sub-modules may be implemented in hardware, such as through hardware circuits. Furthermore, some or all of the modules can be selected to achieve the purpose of this application's solution according to actual needs.

[0023] Please refer to Figure 1 This invention provides a system control method for a high-power CT power supply intelligent device.

[0024] S101: Obtain bus current data and calculate the current maximum output power based on the bus current data; The CT acquires bus current through an internally integrated sensor. This bus current information is used to determine the maximum output power of the entire CT and communicates with the load to obtain information such as load power and temperature. Furthermore, the CT design considers the corresponding output power based on the bus current. The maximum output power of the CT is related to the core material, size, and temperature, and can be obtained through actual measurement after the design is completed, without requiring calculation.

[0025] S102: Obtain the current load power and determine whether the load power matches the maximum output power; S103: If there is a mismatch, adjust the current load power; if there is a match, obtain the current data output by each CT module in the current CT power supply intelligent device. S104: Calculate the output power of each CT module based on the current data output by each CT module, and determine whether the output power of each CT module is consistent. If consistent, maintain the output; if inconsistent, select the abnormal CT module for adjustment.

[0026] The current drawn from the current transformer (CT) bus varies widely, and the load power is typically not constant; the higher the bus current, the greater the power drawn by the CT. Ideally, the load power should be low when the bus current is low and increase further when the bus current is high. However, there are situations where a low bus current drives a high-power load, or a high bus current drives a low-power load. Therefore, a dynamic power regulation mechanism is needed to achieve intelligent power optimization.

[0027] The dynamic power regulation mechanism is based on the dynamic matching of load demand and input energy, and monitors parameters such as primary current, module temperature, output voltage / current, and ambient temperature and humidity in real time. Under low current conditions, it reduces the power supply to non-critical loads and prioritizes the normal operation of core equipment (such as communication modules). Under high current conditions, it starts energy storage charging or power supply to high-power equipment (such as laser foreign object removal).

[0028] In one exemplary embodiment of the present invention, adjusting the current load power includes: If the current maximum output power is greater than the load power, a control signal is issued to start energy storage charging or several load devices; if the current maximum output power is less than or equal to the load power, a control signal is issued to shut down several load devices.

[0029] In one exemplary embodiment of the present invention, the method for determining consistency and inconsistency includes: Set a first judgment threshold for output power, and determine whether the difference in output power between each CT module is greater than the corresponding first judgment threshold; If it is greater than, it is considered inconsistent; if it is less than or equal to, it is considered consistent.

[0030] The system determines whether a module is functioning correctly by analyzing the internal temperature data of each CT module and the voltage output from the module.

[0031] At this point, the number of parallel CT modules is N, and the power required by the load is Pload. Therefore, the power output of each CT is Pload / N.

[0032] In one exemplary embodiment of the present invention, adjusting an abnormal CT module includes: Obtain the temperature and voltage data of the currently abnormal CT module, obtain the difference between the temperature and voltage data and the temperature and voltage data of the normal CT module, and set the second judgment threshold for the temperature and voltage data respectively. If the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, the corresponding fault type will be output and the first control signal for adjustment will be issued. If there is no situation where the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, then an adjustment second control signal is issued.

[0033] For each CT module, there is a corresponding switch on the motherboard to control whether the CT module outputs externally. When the corresponding CT module needs to output, the motherboard turns on the corresponding switch.

[0034] Secondly, the CT module may malfunction due to either voltage or temperature issues. Therefore, different measures need to be taken for each. For modules with abnormal output, adjustments should be made after determining the cause: is the abnormal output current due to inconsistent output voltage, or is the abnormality caused by excessive module temperature or damage? For example, in the first control signal of this embodiment, if the abnormality is caused by voltage, the control signal for adjusting the output voltage needs to be adjusted; if it is caused by temperature, a control signal for cooling needs to be issued. Furthermore, if neither of these is the cause, and other abnormalities exist, the output power of other normally functioning modules needs to be re-controlled to match the load.

[0035] like Figure 2 As shown, the present invention also provides a system for a high-power CT power supply intelligent device, including several CT modules and a common motherboard, wherein the common motherboard is connected to the several CT modules; The common motherboard is used to implement the system control method of the above-mentioned high-power CT power supply intelligent device.

[0036] Specifically, the CT module includes an energy harvesting magnetic core, a coupling coil, and sequentially connected lightning protection module, resonant module, discharge module, rectifier module, power conversion module, output protection module, and a control module connected to the discharge module and power conversion module.

[0037] In this embodiment, the lightning protection unit is used to absorb or discharge the transient high energy generated by lightning strikes, preventing the transient high energy from flowing into the equipment and burning the circuit board or components; the resonant unit is used to improve the system impedance characteristics and enhance the power extraction capability under low current conditions; the discharge unit is used to quickly guide excess energy to the ground wire, automatically conducts when the secondary side is abnormally open or the load is disconnected, provides a low-impedance discharge circuit, suppresses induced high voltage, and protects the CT core and subsequent circuits; the control unit is used to control the output of the power conversion unit, the switching of the discharge unit, and some other auxiliary control functions; the output protection unit is used to limit the output voltage and current to ensure the safe and stable operation of the entire system.

[0038] Secondly, the common motherboard includes several interactive modules, a current sharing control module, a switch module and an output interface connected in sequence, as well as a wireless communication module connected to the current sharing control. Several interactive modules are connected to the output protection modules of several CT modules, and the output interface is connected to an external load.

[0039] The system includes an interactive module for acquiring information from each CT module; a current sharing control module that uses the information from the interactive module for feedback control to ensure consistent current output from each CT module, prevent circulating current between modules, ensure uniform power distribution, and improve system stability and reliability; a switching module that can independently control the output of each CT module; an output interface that integrates overvoltage, overcurrent, and overheat protection functions, as well as communication with downstream loads, ensuring safe and stable operation of the device under complex conditions such as light load, heavy load, and sudden load changes; and a wireless communication module that uploads data such as the operating status, output power, and temperature of each module in real time, enabling digital and intelligent management of the power supply system.

[0040] Traditional current transformer (CT) power supply devices draw power proportional to the square of the primary current. When the line is under light load or operating at low current at night, the magnetic flux density in the core is low, resulting in a small secondary induced voltage and severely insufficient power draw, even preventing the startup of downstream circuits. By adding a resonant unit to the CT secondary winding, a resonant circuit is formed with the coupling coil wound on the core, aligning the resonant frequency with the AC bus operating frequency. At this point, the system enters a resonant state, the equivalent impedance of the resonant circuit reaches its maximum value, the induced coupling voltage increases significantly, and the lower limit of the system's operating current can be greatly reduced. Furthermore, because a current transformer (CT) is essentially a current source device, open circuits on the secondary side are strictly prohibited, requiring mandatory protection measures. The discharge unit can immediately activate upon detecting an open circuit or high voltage, providing a low-impedance path to ensure equipment safety. The intelligent power regulation mechanism enables "early detection and proactive control," providing early warnings and interventions for anomalies by monitoring the equipment's operating status in real time, thereby improving system stability.

[0041] like Figure 3As shown, the present invention also provides a high-power CT power-harvesting intelligent device, including a housing 2 and a bus current detection sensor 3 and several CT modules 4 disposed inside the housing 2. The bus current detection sensor 3 is arranged in parallel with the CT modules 4. The bus current detection sensor 3 and the CT modules 4 are used for the bus 1 to pass through its interior to collect and acquire electrical energy. Both ends of the housing 2 are provided with housing end caps 8, and one of the housing end caps 8 is provided with an output terminal 7. The outer shell 2 includes several connectable extended outer shells 6, which are inlaid and connected together, and a mother plate 5 is provided on the extended outer shells 6 and the outer shell 2.

[0042] The device consists of multiple standardized CT modules. Each CT module includes an energy harvesting magnetic core, a coupling coil wound around the energy harvesting magnetic core, a lightning protection unit, a resonant unit that resonates with the coupling coil, a rectifier power supply, a power conversion unit, a control unit, and an output protection unit. The energy harvesting magnetic core is snap-fitted onto the transmission line. When an alternating current flows through the conductor, an alternating magnetic flux is generated in the energy harvesting magnetic core. According to Faraday's law of electromagnetic induction, the coupling coil wound around the CT will induce an alternating electromotive force through the alternating magnetic flux. After rectification and power conversion, the induced alternating current is converted into a stable direct current.

[0043] The CT module adopts an integrated connection structure, automatically connecting power and signals while mechanically splicing together. The outputs of each module are connected in parallel to a common motherboard, allowing the number of modules to be increased or decreased according to output power requirements, achieving linear expansion of the total output power and adapting to the needs of different current-level lines and load power. The device can also be expanded with different sensor modules for monitoring various circuit conditions. The device housing protects the internal circuit motherboard and CT module, and is equipped with output terminals for external power supply or communication.

[0044] This solution enhances output power through the parallel stacking of standardized modules. The total output power increases linearly with the number of modules, providing a stable output of tens or even hundreds of watts. This effectively supports long-term power supply for high-power devices such as high-definition video surveillance, laser foreign object removal, and edge computing terminals. Current sharing control ensures consistent output current across all CT modules, enabling power scalability.

[0045] For power transmission and distribution lines with different voltage levels and current ranges, a certain margin can be reserved to match the corresponding number of CT modules according to the load requirements. When a certain CT module fails, the other modules can still continue to work, avoiding the failure of the entire system. When repairing a fault, only the faulty module can be replaced, thus avoiding the scrapping of the entire system.

[0046] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0047] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. This computer software product, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system control method for a high-power CT power supply intelligent device, characterized in that, include: Obtain bus current data and calculate the current maximum output power based on the bus current data; Obtain the current load power and determine whether the load power matches the maximum output power; If they do not match, adjust the current load power; if they match, obtain the current data output by each CT module in the current CT power supply intelligent device. The output power of each CT module is calculated based on the current data output by each CT module. It is then determined whether the output power of each CT module is consistent. If they are consistent, the output is maintained. If they are inconsistent, the abnormal CT module is selected for adjustment.

2. The system control method for a high-power CT power supply intelligent device according to claim 1, characterized in that, The adjustment of the current load power includes: If the current maximum output power is greater than the load power, a control signal is issued to start energy storage charging or several load devices. If the current maximum output power is less than or equal to the load power, a control signal is issued to shut down several load devices.

3. The system control method for a high-power CT power supply intelligent device according to claim 2, characterized in that, The methods for determining consistency and inconsistency include: Set a first judgment threshold for output power, and determine whether the difference in output power between each CT module is greater than the corresponding first judgment threshold; If it is greater than, it is considered inconsistent; if it is less than or equal to, it is considered consistent.

4. The system control method for a high-power CT power supply intelligent device according to claim 3, characterized in that, If there is a discrepancy, the abnormal CT module will be selected for adjustment, including: Obtain the temperature and voltage data of the currently abnormal CT module, obtain the difference between the temperature and voltage data and the temperature and voltage data of the normal CT module, and set the second judgment threshold for the temperature and voltage data respectively. If the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, the corresponding fault type will be output and the first control signal for adjustment will be issued. If there is no situation where the difference between the temperature data and voltage data of the normal CT module is greater than the corresponding second judgment threshold, then an adjustment second control signal is issued.

5. A system for a high-power CT power supply intelligent device, characterized in that, It includes several CT modules and a common motherboard, wherein the common motherboard is connected to the several CT modules; The common motherboard is used to execute the system control method of a high-power CT power supply intelligent device as described in any one of claims 1-4.

6. The intelligent power supply system for a high-power CT scanner according to claim 5, characterized in that, The CT module includes an energy harvesting magnetic core, a coupling coil, and sequentially connected lightning protection module, resonant module, discharge module, rectifier module, power conversion module, output protection module, and a control module connected to the discharge module and power conversion module.

7. The intelligent power supply system for a high-power CT scanner according to claim 6, characterized in that, The common motherboard includes several interactive modules, a current sharing control module, a switch module and an output interface connected in sequence, as well as a wireless communication module connected to the current sharing control. Several of the interactive modules are connected to the output protection modules of several CT modules, and the output interface is connected to an external load.

8. A high-power CT power supply intelligent device, characterized in that, The system including the high-power CT power-taking intelligent device as described in claim 5 further includes a housing, a bus current detection sensor and several CT modules disposed within the housing, the bus current detection sensor being arranged in parallel with the CT modules, the bus current detection sensor and the CT modules being used for the bus passing through its interior to acquire and collect electrical energy, and both ends of the housing being provided with housing end caps, one of which is provided with an output terminal on the housing end cap.

9. A high-power CT power-generating intelligent device according to claim 8, characterized in that, The outer shell includes several connectable extended outer shells, and the several extended outer shells are embedded and connected.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements a system control method for a high-power CT power-generating intelligent device as described in any one of claims 1-4.

Images