Real-time monitoring and energy consumption control technology for ac loss of superconducting power equipment

Abstract

The application belongs to the technical field of superconducting power and is a real-time monitoring and energy consumption control technology for AC loss of superconducting power equipment, comprising an AC loss measurement module, a real-time monitoring and display module and an intelligent energy consumption control module.In operation, the AC loss rapid measurement module rapidly measures the collected superconducting voltage / current signals, and when the real-time monitoring module monitors that the AC loss is higher than the initially set safety threshold, an alarm signal is outputted and the intelligent energy consumption control module is automatically started, the input current amplitude of the superconducting power equipment is reduced or the refrigeration power of the low-temperature refrigeration system is adaptively regulated based on the closed-loop control method of the intelligent control strategy, and finally the AC loss is controlled within the safety threshold in time.The technology can not only effectively avoid the generation of excessive AC loss and heat by the superconducting power equipment, greatly improve the safety and reliability of the superconducting equipment, but also realize energy saving and consumption reduction, reduce operation cost and improve economy.

Description

Technical Field

[0001] This invention belongs to the field of superconducting power technology, and more specifically, relates to a technology for real-time monitoring of AC loss and system energy consumption control applicable to superconducting power equipment. Background Technology

[0002] Unrestricted DC flow and extremely low loss are the essential properties of superconducting materials. Superconducting technology has played a crucial role in major scientific projects and important industrial applications such as nuclear fusion, accelerators, electrical engineering, and medicine. With the continuous progress and development of low-temperature superconducting materials towards high-temperature superconducting materials, the critical temperature of practical superconducting materials has increased from 4.2K to 77K. The bottleneck of cryogenic cooling technology, which limited superconducting performance, has been gradually broken, with cooling efficiency increasing by 40 to 50 times and cooling costs decreasing to less than 1 / 10 of the original. In addition, in recent years, the performance of domestically produced high-temperature superconducting tapes has been continuously improved, possessing first-class critical current, low AC loss, and excellent winding performance. At the same time, the emergence of new superconducting cable structures has further reduced anisotropy, increased critical current, and reduced AC loss, providing important conditions for the development of superconducting power equipment.

[0003] Superconducting power equipment is an advanced type of power equipment with enormous development potential, developed by utilizing the unobstructed high-density current-carrying capacity and the intrinsic properties of the superconducting and normal states of high-temperature superconductors. Important types have been developed, including superconducting cables, superconducting transformers, superconducting current limiters, superconducting motors, large-diameter superconducting magnets, and superconducting energy storage. It plays an important role in increasing power system capacity, saving energy and reducing consumption, reducing size, and improving efficiency. It will strongly support the national dual-carbon policy and has significant strategic development value.

[0004] However, with the continuous development of superconducting power technology, the scale and capacity of superconducting power equipment are constantly increasing. Although the AC loss generated during the transmission of AC current in normal operation is extremely low, the heat generated cannot be ignored for the stable and safe operation of superconducting power equipment. Because superconducting power equipment requires a supporting cryogenic cooling system to maintain a good low-temperature environment for stable operation, if the heat loss generated during AC transmission cannot be removed by the cooling system in time, it will cause localized temperature rises in the superconducting power equipment. This temperature rise will cause the critical current of the superconductor to continuously decrease, which in turn will further increase the AC loss and heat generated by the superconducting power equipment, ultimately leading to a rapid increase in localized temperature. If the cooling system is powerful enough, the localized temperature rise will not extend to other areas. However, if the cooling power of the system is insufficient to suppress this heat loss, the temperature in the localized temperature rise area will continue to rise, and the heat will rapidly diffuse across the superconducting power equipment, causing more areas to experience temperature rises. When the temperature rise exceeds the superconducting critical temperature, the localized temperature of the superconducting equipment will increase exponentially. If remedial measures are not taken in time to suppress this, the superconducting unit, the core of the superconducting power equipment, and even the entire power equipment will eventually burn out.

[0005] Furthermore, the heat generated by superconducting AC losses has a significant impact on the economic benefits and energy consumption assessment of superconducting power equipment. As AC losses gradually accumulate, leading to a rapid increase in heat and subsequent temperature rise, the workload of the supporting cooling system is forced to increase. If the cooling system's design power is unreasonable, it will result in excessive power consumption, increased costs, and reduced economic efficiency. Moreover, only when the sum of the AC losses of the superconducting power equipment and the energy consumption of the supporting cooling system is less than that of ordinary power equipment does the superconducting power equipment have significant economic benefits for large-scale operation.

[0006] AC loss, as a crucial performance indicator, is a major factor affecting the operational stability and economic cost of high-capacity superconducting power equipment. Therefore, real-time monitoring of AC loss and system energy consumption control of core superconducting units are of great significance for cutting-edge scientific fields such as superconducting cable transmission, high-voltage superconducting current limiters, high-field superconducting magnets, and high-power-density superconducting generators.

[0007] Because the resistive and inductive voltage components of superconducting power equipment differ significantly, measuring the resistive loss component under alternating current is very difficult, becoming a bottleneck affecting the operational safety of superconducting power equipment. How to quickly and accurately monitor AC loss in real time and achieve closed-loop feedback control of the superconducting system is crucial for ensuring the performance, reliability, and economy of superconducting power equipment.

[0008] Traditional research on AC loss in superconducting systems mainly focuses on computational simulation and experimental studies, lacking technologies and methods for real-time monitoring of AC loss and system energy consumption control. Furthermore, traditional measurement methods primarily rely on precision instruments such as lock-in amplifiers for phase-locked measurements, which require high-quality input signal waveforms. This results in problems such as long lock-in periods, susceptibility to external interference, difficulty in accurate short-term measurements, and limited applicability to a wide load range, failing to meet the real-time monitoring requirements for AC loss in the complex operating conditions of superconducting power equipment.

[0009] Therefore, this invention patent addresses the problems faced by the safe and stable operation of the above-mentioned superconducting power equipment by proposing an equipment-level AC loss assessment and control technology, realizing the "fast, accurate, wide-range, and intelligent" AC loss measurement, assessment, real-time monitoring, and energy consumption control capabilities of superconducting power equipment. Summary of the Invention

[0010] To avoid serious problems affecting the operating efficiency and safety of superconducting power equipment, such as overheating due to excessive AC loss or even burnout due to quenching failure, this invention provides a technology for real-time measurement and monitoring of AC loss and intelligent energy consumption control of superconducting power equipment.

[0011] To achieve the above objectives, the technical method adopted by the present invention is as follows:

[0012] A real-time monitoring and intelligent energy consumption control technology for AC loss in superconducting power equipment is characterized by comprising three main parts: a rapid AC loss measurement module, a real-time data monitoring module, and a system energy consumption intelligent control module. The rapid AC loss measurement module includes a multi-channel high-precision data acquisition system and a rapid superconducting AC loss calculation program. During operation, the analog voltage and current signals of the superconducting power equipment are first acquired through the multi-channel high-precision data acquisition card, converted into digital signals, and then transmitted to the rapid AC loss measurement program for calculation. The data results are then transmitted to the real-time data monitoring module for accurate real-time display. The real-time data monitoring module includes a PC interface display system and an NI-LabVIEW graphical development platform for receiving, storing, and displaying the measured superconducting voltage and current signals. During operation, the real-time data monitoring module first receives the digital voltage / current signals transmitted from the measurement module, and then rapidly responds and displays them in real-time as time-varying curves on the graphical development platform, facilitating operators to monitor the changes in AC loss of the superconducting power equipment during operation. The system's intelligent energy consumption control module includes a high-precision, fast-response controller system and an intelligent control strategy program. During operation, when the AC loss data detected by the real-time monitoring module exceeds the initially set safety threshold, an alarm signal will be output to remind the operator, and the system's intelligent energy consumption control module will be automatically activated. Through a fast-response closed-loop control method combining PID control strategy and neural network intelligent control strategy, the input current amplitude of the superconducting power equipment will be reduced or the output cooling capacity of the cryogenic refrigeration system will be increased to adapt and adjust the control, ultimately achieving the goal of timely controlling the AC loss amplitude within a safe and stable range.

[0013] Preferably, the superconducting AC loss rapid calculation program is based on digital signal conditioning to achieve accurate acquisition of orthogonal signals of the same frequency, and develops demodulation filtering technology to achieve clear identification of superconducting voltage resistive signals and rapid calculation of AC loss. This measurement program reduces the dependence on the compensation coil measurement circuit in traditional measurement methods and improves the response speed of AC loss measurement and the ability to monitor multiple channels / multi-units simultaneously.

[0014] Preferably, the real-time data monitoring module can not only display the real-time measurement results of superconducting AC loss, but also the cumulative results of the instantaneous values ​​of AC loss measurement. In addition, it can also display the waveforms of the initial input voltage and current signals, the waveform of the current signal flowing through the superconducting unit, and the waveforms of the voltage signals across the superconducting unit in real time. Furthermore, according to actual monitoring needs, a real-time temperature monitoring module, a quenching monitoring module, etc., can be added in the form of modules. The real-time display function is powerful, adjustable, and readable.

[0015] Preferably, the real-time data monitoring module and the real-time waveform control are often used in loop structures to retain and display previously collected data and append newly generated data, displaying these data in a continuously updated manner.

[0016] Preferably, the intelligent energy consumption control module of the system, for superconducting power equipment with adjustable transmission current, such as superconducting motors and superconducting magnets, has developed a PID dual-closed-loop integrated control system. When the real-time monitored AC loss result is higher than the set threshold, the PID dual-closed-loop integrated control system receives an adjustment signal. First, it increases the cooling power of the subcooled liquid nitrogen refrigeration system through the inner loop to strongly cool the superconducting power equipment. If the real-time monitored value of AC loss after cooling is reduced to a safe range, the adjustment is successful. If the real-time monitored value of AC loss after cooling is still higher than the set safe threshold, the outer loop control route is activated to reduce the amplitude of the transmission current. If the real-time monitored value of AC loss after reducing the current is reduced to a safe range, the adjustment is successful. Otherwise, it is necessary to directly control the shutdown of the superconducting power equipment to protect it from overheating and burning.

[0017] Preferably, the intelligent energy consumption control module of the system has developed a PID closed-loop fast response control system for superconducting power equipment with non-adjustable transmission current, such as superconducting cables, superconducting current limiters, and superconducting transformers. When the real-time monitored AC loss result is higher than the set threshold, the PID closed-loop control system increases the cooling power of the subcooled liquid nitrogen refrigeration system to strongly cool the superconducting power equipment. If the real-time monitored value of AC loss after cooling is reduced to a safe range, the adjustment is successful; if the real-time monitored value of AC loss after cooling is still higher than the set safe threshold, the power supply to the superconducting power equipment is directly and quickly cut off to avoid the superconducting power equipment from generating a large amount of heat due to excessive AC loss, which would severely affect the operating efficiency of the equipment and may even cause the superconducting module to lose its superconductivity, ultimately resulting in the loss of the superconducting power equipment.

[0018] Overall, the integrated technology of rapid measurement, real-time monitoring, and intelligent energy consumption control described in this invention, when applied to superconducting power equipment, offers the following advantages compared to existing AC loss measurement technologies:

[0019] (1) The present invention provides a real-time monitoring and energy consumption control technology for AC loss of superconducting power equipment. Compared with the traditional real-time monitoring system for superconducting safety, the real-time monitoring and energy consumption control based on AC loss measurement has a faster measurement speed, higher measurement accuracy, and higher testing efficiency. It can prevent irreversible failures such as burnout of superconducting power equipment earlier and nip the failure in the bud.

[0020] (2) The present invention provides a real-time monitoring and system energy consumption control technology for superconducting power equipment AC loss. When the monitored superconducting AC loss value exceeds the preset safety threshold, a protection signal and warning are immediately given, and interlock protection is activated. Alternatively, the system power supply can be directly and quickly cut off by program control to ensure that the superconducting power equipment is not burned out, which greatly enhances the safety and reliability of the superconducting equipment.

[0021] (3) The present invention provides a real-time monitoring of AC loss and system energy consumption control technology for superconducting power equipment. Based on intelligent PID feedback regulation and control technology, it can provide more reliable and accurate power control commands for the cryogenic refrigeration system of superconducting power equipment, so that the refrigeration system can operate according to the actual refrigeration power required by the superconducting power equipment, instead of always being in full load operation, so that the energy consumption of the whole system is lower, achieving the purpose of energy saving and consumption reduction, and also making the operating cost of the whole system lower.

[0022] (4) The present invention provides a real-time monitoring and system energy consumption control technology for AC loss of superconducting power equipment. Compared with the traditional single AC loss measurement technology, this method can not only collect AC loss data during the operation of superconducting power equipment, but also store and display the measurement results in real time. Based on the monitored AC loss results, dynamic intelligent feedback adjustment is performed through system energy consumption control technology to ensure that the superconducting power equipment is always in a safe and stable working state.

[0023] (5) The present invention provides a real-time monitoring and energy consumption control technology for AC loss of superconducting power equipment. Based on high-precision orthogonal signal coherent detection AC loss measurement technology and fast-response real-time data display technology, and combined with an Ethernet-based communication module, it realizes long-distance real-time monitoring and display of AC loss, and can quickly and accurately grasp the overall working status of superconducting power equipment.

[0024] (6) The present invention provides a real-time monitoring of AC loss and system energy consumption control technology for superconducting power equipment. It is not only applicable to the application of superconducting power equipment, but also to the rapid measurement, real-time monitoring, energy consumption control and precise protection of various forms of superconducting units. The method has a novel overall concept, is system-integrated and intelligent, and is easy to operate. Attached Figure Description

[0025] To more clearly illustrate the technical methods of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the AC loss energy consumption control system for superconducting power equipment according to the present invention.

[0027] 1-High-current frequency converter, 2-Data acquisition and feedback control system, 3-Superconducting power equipment or superconducting unit under test, 4-Subcooled liquid nitrogen circulating cooling system

[0028] Figure 2 This is a schematic diagram of the structure of a real-time monitoring and control system for AC loss of superconducting power equipment according to the present invention.

[0029] 11-Variable frequency power supply, 12-Filter transformer, 13-Compensation capacitor cabinet, 14-Current booster transformer, 21-Resistive shunt, 22-Signal line, 23-Sound and vibration data acquisition card, 24-Intelligent feedback controller, 25-PC processing and display interface, 26-Cooling system refrigeration power feedback control loop, 27-Input current feedback control loop, 31-Superconducting single source under test, 32-Cryogenic container, 41-Subcooled liquid nitrogen Dewar, 42-Cryogenic pump, 43-Subcooled liquid nitrogen, 44-Vacuum insulated pipe, 45-Stirling refrigerator

[0030] Figure 3 This is a flowchart of a method for real-time monitoring of AC loss and energy consumption control in superconducting power equipment according to the present invention.

[0031] Figure 4 This is a flowchart of an energy-saving control method for AC loss in superconducting power equipment according to the present invention. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0033] This invention provides a real-time monitoring and energy consumption control system for AC loss of superconducting power equipment, as well as corresponding control methods and strategies. By monitoring the AC loss of superconducting power equipment in real time during normal operation, and adjusting the cooling power of the cryogenic system and the input current source in a closed loop based on the real-time AC loss measurement, the superconducting power equipment is kept in the optimal operating condition of high efficiency and high energy saving. This effectively avoids serious problems affecting the operating efficiency and safety of superconducting power equipment, such as overheating due to excessive AC loss or even burnout due to quenching failure. Furthermore, intelligent adjustment and control make operation simpler and adjustment more precise for staff.

[0034] Figure 1This is a schematic diagram of the AC loss energy consumption control system for superconducting power equipment according to the present invention. The system as a whole includes: a high-current frequency converter power supply 1, a data acquisition and feedback control system 2, the superconducting power equipment or superconducting unit under test 3, and a supercooled liquid nitrogen circulating cooling system 4. The data acquisition and feedback control system 2 is the control center, receiving voltage and current signals from the superconducting unit, calculating the real-time AC loss value through an orthogonal signal coherent detection method, and issuing control command signals to the high-current frequency converter power supply 1 and the supercooled liquid nitrogen circulating cooling system 4 based on the magnitude of the real-time AC loss value, so that they adjust themselves to ensure that the superconducting unit is in the optimal working environment. Then, based on the voltage and current signals of the superconducting unit after system adjustment, the AC loss value is calculated to evaluate whether the superconducting power equipment is in a safe and stable operating state.

[0035] Figure 2 This is a schematic diagram of the structure of a real-time monitoring and control system for AC loss of superconducting power equipment according to the present invention. The system as a whole includes: a frequency converter 11, a filter transformer 12, a compensation capacitor cabinet 13, a current booster transformer 14, a resistive shunt 21, a signal line 22, a sound and vibration data acquisition card 23, an intelligent feedback controller 24, a PC processing and display interface 25, a cooling system cooling power feedback control loop 26, an input current feedback control loop 27, a superconducting unit under test 31, a cryogenic container 32, a supercooled liquid nitrogen Dewar 41, a liquid nitrogen pump 42, liquid nitrogen 43, a vacuum insulation pipe 44, and a Stirling refrigerator 45.

[0036] Furthermore, the working principle of the high-current frequency converter power supply device 1 is as follows: the frequency converter power supply 11 generates an approximate sinusoidal signal through internal electronic devices, and its output terminal is connected to the input terminal of the filter transformer 12; after the filter transformer 12 initially reduces the voltage and increases the current, its output terminal is connected to the input terminal of the capacitor compensation cabinet 13; the capacitor compensation cabinet 13 compensates for the reactive power inside the measurement system by connecting multiple split capacitors in parallel, and its output terminal is connected to the input terminal of the high-current generator (current boosting transformer) 14; the output terminal of the current boosting transformer 14 is directly connected to both ends of the superconducting unit 31 under test; the sound and vibration data acquisition card 23 acquires the current and voltage signals at both ends of the superconductor, and converts the analog signal into a digital signal and sends it to the PC processing and display interface 25. The resolution of the sound and vibration data acquisition card 23 should be ≥24 bits.

[0037] Furthermore, the working principle of the supercooled liquid nitrogen circulating cooling system 4 is as follows: First, sufficient 77K liquid nitrogen 43 is injected into the supercooled liquid nitrogen Dewar 41. The liquid nitrogen 43 is then pumped into the superconducting cryogenic container 32 using a liquid nitrogen pump 42. The liquid nitrogen absorbs heat and evaporates into nitrogen gas, which flows through a vacuum pipe 44 into a Stirling refrigerator 45. The Stirling refrigerator 45 is then activated, cooling the nitrogen gas back into liquid nitrogen, which returns to the supercooled liquid nitrogen Dewar 41. After a period of time, the superconducting cryogenic container 32 will be filled with liquid nitrogen, at which point the entire system will be a liquid nitrogen circulating system. The refrigerator 45 continues to operate, continuously cooling the liquid nitrogen to a supercooled state (65K~75K). The supercooled liquid nitrogen continues to flow into the superconducting cryogenic container 32 under the action of the liquid nitrogen pump 42 to further cool the superconducting unit 31, while simultaneously monitoring the temperature and pressure of the superconducting cryogenic container 32. To ensure that the superconducting unit 31 under test is always in a state of supercooled liquid nitrogen, the outlet liquid nitrogen temperature should be controlled below 75K, that is, to ensure a "complete supercooled liquid nitrogen cycle". The power for the entire cycle is generated by the liquid nitrogen pump 42. At the same time, the flow rate of the cycle system needs to be monitored at all times, and the temperature and pressure of the supercooled liquid nitrogen Dewar 41 need to be monitored throughout the entire process.

[0038] Figure 3 This is a flowchart of a method for real-time monitoring of AC loss and energy consumption control of superconducting power equipment according to the present invention. The control method includes: first, turning on the power supply, setting the initial parameters required for the normal operation of the superconducting power equipment, and after the alternating current is applied, the superconducting power equipment starts to run and reaches a stable operating state, with the core superconducting unit continuously generating AC loss.

[0039] Furthermore, the superconducting AC loss is rapidly measured using an orthogonal signal coherent detection program.

[0040] Furthermore, the real-time data monitoring module displays the measured values ​​of AC loss, voltage amplitude, and current amplitude in real time.

[0041] Furthermore, it is determined whether the measured value of AC loss exceeds the initially set safety threshold. If the measured value is lower than the safety threshold, the AC loss generated by the core superconducting unit is continuously measured and monitored in real time. If the measured value is higher than the safety threshold, the operation of the superconducting power equipment is adjusted by the system energy consumption intelligent control module based on the PID dual closed-loop feedback control strategy.

[0042] Specifically, the flow rate of subcooled liquid nitrogen can be increased by increasing the cooling power of the Stirling refrigerator or by adjusting the liquid nitrogen pump, thereby further reducing the ambient temperature of the superconducting unit and thus more quickly removing the excessive Joule heat generated by superconducting AC losses.

[0043] Specifically, the alternating current input to the superconducting power equipment can be reduced by adjusting the frequency converter, thereby reducing the superconducting AC losses at the source.

[0044] Specifically, if the heat generated by superconducting AC losses is excessive and there is a tendency to burn out the core components of the superconducting power equipment, the intelligent feedback controller can make a judgment and directly and quickly cut off the power switch to disconnect the power source.

[0045] Furthermore, when the superconducting AC loss value returns to the safe threshold, the parameter settings are readjusted according to the above adjustments to restore the superconducting power equipment to normal operation. If, after the above energy consumption control adjustments, the AC loss continues to increase and fails to return to the safe threshold, the heat generation will continue to increase, which may cause the superconducting unit to lose superconductivity, resulting in malfunction or even burnout of the superconducting power equipment. In this case, the superconducting power equipment must be disassembled, the core superconducting unit component replaced, and readjusted.

[0046] Figure 4 This is a flowchart of an energy-saving control method for AC loss in superconducting power equipment according to the present invention. The control method includes: first, turning on the power supply, setting the initial parameters required for the normal operation of the superconducting power equipment, and after the alternating current is applied, the superconducting power equipment starts to operate and reaches a stable operating state, while the core superconducting unit continuously generates AC loss.

[0047] Furthermore, the energy consumption control module enables intelligent feedback adjustment of the superconducting power equipment, ensuring that the superconducting AC power loss and the cryogenic system's cooling power are optimally matched.

[0048] Specifically, when the superconducting AC loss is lower than the cryogenic system's cooling power, the intelligent controller sends a command to the cryogenic system to reduce the cooling power; when the superconducting AC loss is higher than the cryogenic system's cooling power, the intelligent controller sends a command to the cryogenic system to increase the cooling power.

[0049] Ultimately, this approach ensures the safe and stable operation of superconducting power equipment without requiring the supercooled liquid nitrogen circulation system to operate at full load continuously. Thus, it achieves high economic benefits such as energy saving, consumption reduction, and cost reduction while ensuring the safe and stable operation of superconducting power equipment.

[0050] Of course, the above embodiments are only used to clearly illustrate the technology and features of the present invention so that those skilled in the art can easily understand and implement it, and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made without departing from the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A real-time monitoring and energy consumption control technology for AC loss in superconducting power equipment, characterized in that, The system includes a rapid AC loss measurement module, a real-time data monitoring module, and a system energy consumption intelligent control module. The rapid AC loss measurement module comprises a multi-channel high-precision data acquisition system and a rapid superconducting AC loss calculation program. It acquires superconducting analog voltage and current signals through the data acquisition card, converts them into digital signals, and sends them to the rapid superconducting AC loss measurement program for calculation. The real-time data monitoring module includes a PC interface display system and an NI-LabVIEW graphical development platform for receiving, storing, and displaying the measured superconducting voltage and current signals in real time. The system energy consumption intelligent control module includes a high-precision fast-response controller system and an intelligent feedback control program. If the current loss exceeds the initially set safety threshold, an alarm signal will be output to remind the operator, and the system's intelligent energy consumption control module will be automatically activated to reduce the input current or increase the output cooling power for adaptive adjustment. The control methods include: rapid measurement of superconducting AC loss using orthogonal signal coherent detection; real-time monitoring and display of the measured AC loss, comparison with the safety threshold, and issuance of judgment commands; and rapid feedback adjustment of the superconducting power equipment's operating status through the energy consumption control module based on the received commands. Rapid feedback adjustment methods include: increasing the cooling power of the Stirling refrigerator or adjusting the liquid nitrogen pump to increase the flow rate of subcooled liquid nitrogen, thereby further reducing the ambient temperature of the superconducting unit. This allows for faster removal of excessive heat generated by superconducting AC losses; by adjusting the frequency converter, the alternating current input to the superconducting power equipment is reduced, thereby minimizing superconducting AC losses at the source; or the power switch can be directly and quickly cut off to prevent burnout of the core components of the superconducting power equipment; provided that the AC losses do not exceed the safety threshold, the energy consumption control module intelligently adjusts the superconducting power equipment to ensure that the superconducting AC loss power and the cooling power of the cryogenic system are always within the optimal matching range; the system's intelligent energy consumption control module, based on AC loss measurements, employs a PID dual closed-loop feedback control strategy to adjust the superconducting power equipment with adjustable transmission current, wherein the inner loop is used to control the cooling of the subcooled liquid nitrogen refrigeration system. The power control module has two loops. The outer loop controls the amplitude of the alternating current input to the superconducting power equipment. If the AC loss is still higher than the safety threshold after the inner loop adjustment, the outer loop will reduce the amplitude of the alternating current. If the AC loss is still higher than the safety threshold after the dual closed-loop adjustment, the power supply to the superconducting power equipment will be cut off. The system's intelligent energy consumption control module is also configured to use a PID closed-loop fast response control strategy for superconducting cables, superconducting current limiters, or superconducting transformers with non-adjustable transmission current. When the real-time monitored AC loss is higher than the safety threshold, the cooling power of the superconducting power equipment will be increased to cool it down. If the real-time monitored AC loss is still higher than the safety threshold after cooling, the power supply to the superconducting power equipment will be cut off directly and quickly.

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