Quenching protection system and method for high-temperature superconducting magnet

Abstract

The invention discloses a quench protection system and method for a high-temperature superconducting magnet, and the system comprises the high-temperature superconducting magnet which is provided with a plurality of stacked magnetic bodies; the data acquisition module is provided with a temperature detection module for acquiring the temperature of each magnetic body; the quench protection module is provided with a heating module used for heating the magnetic body and an energy discharging module used for discharging stored energy of the high-temperature superconducting magnet; and the control module is used for receiving the temperature data of the temperature detection module and controlling starting and stopping of the heating module and starting and stopping of the energy discharging module based on the temperature data. According to the quench protection system and method for the high-temperature superconducting magnet, the heating module and the temperature detection module are embedded into the structural layout of the high-temperature superconducting magnet, and the structural optimization of the heating belt and the selection of the insulating layer material of the heating module are matched; the problems that a high-temperature superconducting magnet quench protection scheme is poor in adaptability, protection delay is obvious, the local overheating risk is high, and a heating unit is prone to mutual inductance interference can be solved.

Description

Technical Field

[0001] This invention relates to the field of superconducting magnet technology, and more specifically to a quench protection system and method for high-temperature superconducting magnets. Background Technology

[0002] High-temperature superconducting magnets (such as REBCO magnets) are important electromagnetic devices with wide applications in fields such as magnetic resonance imaging, nuclear magnetic resonance imaging, and particle accelerators. Due to the unique properties of high-temperature superconducting materials, quenching may occur when the magnet's operating environment changes or it is subjected to external disturbances; this is the transition from the superconducting state to the normal state. The quenching process generates a large amount of heat and electrical resistance, which, if not addressed promptly, can lead to magnet damage or even safety accidents. Therefore, establishing an effective quenching protection system is crucial for ensuring the safe operation of high-temperature superconducting magnets.

[0003] Currently, high-temperature superconducting magnets using non-insulated winding technology possess a certain degree of self-protection capability thanks to their inter-turn shunt mechanism. However, as high-temperature superconducting magnets develop towards larger sizes and higher energy storage capacities, their inherent drawback of slow quench propagation speed becomes apparent under extreme conditions (e.g., high current carrying capacity of the conductor itself or the magnet being in a strong magnetic field). This results in the magnet's enormous energy storage capacity not being dissipated quickly and uniformly, still posing a risk of localized overheating or even strip burnout. Therefore, for high-safety-level applications, relying solely on their inherent self-protection mechanism is insufficient to meet reliability requirements.

[0004] In the field of low-temperature superconducting magnets, active heating quench protection is a mature and effective technology. However, this technology has long been unable to be successfully applied to high-temperature superconducting magnets, mainly due to three major obstacles: First, traditional active heating solutions are difficult to be compatible with the pancake structure commonly used in high-temperature superconducting magnets. Conventional heating elements cannot achieve deep embedding and efficient thermal coupling without affecting the winding insulation and mechanical integrity. Secondly, due to the high heat capacity and stability of high-temperature superconducting tapes, the energy injection time window required to trigger a global quench is extremely short. Traditional arrangement methods and temperature feedback (such as metal sensors) are slow to respond and cannot complete rapid and reliable intervention before the local hotspots formed by natural quench spread. Third, heating circuits placed in strong changing magnetic fields are prone to significant mutual inductance, which can interfere with the normal working magnetic field of the magnet and even induce additional losses or instability. Summary of the Invention

[0005] The purpose of this invention is to provide a quench protection system and method for high-temperature superconducting magnets, which solves the problems of poor adaptability of quench protection schemes for high-temperature superconducting magnets, significant protection delay, high risk of local overheating, and easy generation of mutual inductance interference by heating units.

[0006] The above-mentioned objectives of this invention are mainly achieved by the following technical solutions: This invention provides a quench protection system for high-temperature superconducting magnets, the quench protection system comprising: High-temperature superconducting magnets have multiple stacked magnetic bodies; The data acquisition module includes a temperature detection module for acquiring the temperature of each of the magnetic bodies; The quench protection module includes a heating module for heating the magnetic body and an energy release module for releasing the stored energy of the high-temperature superconducting magnet. The control module is used to receive temperature data from the temperature detection module and control the start and stop of the heating module and the start and stop of the energy dissipation module based on the temperature data.

[0007] According to one embodiment of the present invention, the magnetic body is a single-pancake structure, and the temperature detection module is disposed on one surface of the magnetic body.

[0008] According to one embodiment of the present invention, the heating module is disposed on another surface of the magnetic body, and the heating module between two adjacent magnetic bodies is separated from the temperature detection module by an isolation structure.

[0009] According to one embodiment of the present invention, the magnetic body has a double-pancake structure, and the temperature detection module is disposed between two adjacent magnetic bodies.

[0010] According to one embodiment of the present invention, the heating module is disposed between the two windings of the magnetic body.

[0011] According to one embodiment of the present invention, the heating module includes a heating structure and two insulating layers sandwiched on both sides of the heating structure. The heating structure has heating bands that are arranged in a reciprocating pattern to form the heating structure.

[0012] According to one embodiment of the present invention, the heating band is made of a conductive material; the insulating layer is made of a polyimide material or a flexible polymer material.

[0013] According to one embodiment of the present invention, the surface of the insulating layer in contact with the magnetic body is coated with a highly thermally conductive insulating silicone grease layer.

[0014] According to one embodiment of the present invention, the temperature detection module is a distributed optical fiber sensor.

[0015] According to one embodiment of the present invention, when the temperature data is greater than the normal operating temperature of the high-temperature superconducting magnet, the control module controls the heating module to heat the high-temperature superconducting magnet until the high-temperature superconducting magnet loses its superconductivity.

[0016] According to one embodiment of the present invention, the control module controls the energy removal module to remove energy from the high-temperature superconducting magnet that has lost its quench.

[0017] According to one embodiment of the present invention, the energy dissipation module is arranged in parallel with the high-temperature superconducting magnet, and includes an energy dissipation resistor and a first switching device for controlling whether the energy dissipation resistor is connected. When the high-temperature superconducting magnet loses quench, the energy dissipation resistor is connected to the circuit through the first switching device.

[0018] According to one embodiment of the present invention, the heating module includes a plurality of heating resistors and a second switching device arranged in series. When it is determined that the high-temperature superconducting magnet may be about to lose quench or has already begun to lose quench, the heating resistors are switched on by the second switching device to actively heat the high-temperature superconducting magnet.

[0019] The present invention also provides a quench protection method for a high-temperature superconducting magnet, the quench protection method comprising: The temperature of a high-temperature superconducting magnet was collected. Determine whether the current temperature of the high-temperature superconducting magnet exceeds the normal operating temperature value of the high-temperature superconducting magnet; Based on the difference between the current temperature of the high-temperature superconducting magnet and the normal operating temperature, quench protection is provided for the high-temperature superconducting magnet.

[0020] According to one embodiment of the present invention, the step of providing quench protection for the high-temperature superconducting magnet based on the difference between the current temperature and the normal operating temperature includes: If the current temperature of the high-temperature superconducting magnet is greater than or equal to the normal operating temperature value, then the high-temperature superconducting magnet is subjected to heat treatment. If the current temperature of the high-temperature superconducting magnet is less than the normal operating temperature value, then it is further determined whether the current temperature of the high-temperature superconducting magnet exceeds the normal operating temperature value.

[0021] According to one embodiment of the present invention, the method further includes: heating the high-temperature superconducting magnet until the high-temperature superconducting magnet loses its superconductivity.

[0022] According to one embodiment of the present invention, the method further includes: performing energy removal treatment on the high-temperature superconducting magnet after it loses quench.

[0023] According to one embodiment of the present invention, the method further includes voltage monitoring of the high-temperature superconducting magnet, and when the current voltage of the high-temperature superconducting magnet exceeds a voltage threshold, quench protection is provided for the high-temperature superconducting magnet.

[0024] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The present invention relates to a quench protection system and method for high-temperature superconducting magnets: 1) By setting the temperature detection module and the heating module at different positions on the magnetic body, the effective coordination of temperature detection and active heating is achieved, solving the problem that traditional active heating schemes are difficult to be compatible with the pancake structure; 2) The reciprocating arrangement of the heating bands effectively avoids mutual inductance in a strong magnetic field environment, eliminates interference with the normal operation of the magnet, and improves its own heating efficiency. 3) By controlling the real-time monitoring and rapid response of temperature data, the defect of slow response to triggering global quench is overcome; 4) By connecting the energy dissipation module in parallel with the high-temperature superconducting magnet, the energy stored in the magnet is rapidly and uniformly dissipated, effectively avoiding the risks of local overheating and strip burnout, and significantly improving the operational safety and reliability of the high-temperature superconducting magnet.

[0025] This invention provides an active quench protection scheme that is deeply compatible with the structure of high-temperature superconducting magnets, has rapid triggering capability, and does not introduce electromagnetic interference, thereby ensuring that the energy stored in large high-temperature superconducting magnets can be released safely and controllably in the event of a fault. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a circuit diagram of the quench protection system for the high-temperature superconducting magnet of the present invention; Figure 2 This is a schematic diagram of the structure of the high-temperature superconducting magnet with a single-pancake structure according to the present invention; Figure 3 This is a schematic diagram of the high-temperature superconducting magnet with a double-pancake structure according to the present invention; Figure 4 This is an exploded structural diagram of the heating module of the present invention; Figure 5 This is a schematic diagram of the first embodiment of the heating structure of the present invention; Figure 6 This is a schematic diagram of the second embodiment of the heating structure of the present invention; Figure 7 This is a schematic diagram of the third embodiment of the heating structure of the present invention; Figure 8The flowchart of the quench protection method for high-temperature superconducting magnets of the present invention is as follows. Figure 1 ; Figure 9 The flowchart of the quench protection method for high-temperature superconducting magnets of the present invention is as follows. Figure 2 .

[0027] Explanation of icon numbers: 1. High-temperature superconducting magnet; 11. Magnet body; 11'. Magnet body; 111. Winding; 12. Isolation structure; 2. Data acquisition module; 21. Temperature detection module; 3. Overrun protection module; 31. Heating module; 311. Heating resistor; 312. Second switching device; 313. Heating structure; 314. Insulation layer; 32. Energy discharge module; 321. Energy discharge resistor; 322. First switching device; 323. Voltage switch; 4. Control module. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0029] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Implementation Method 1

[0032] like Figures 1 to 7As shown, the present invention provides a quench protection system for a high-temperature superconducting magnet, comprising four main components: a high-temperature superconducting magnet 1, a data acquisition module 2, a quench protection module 3, and a control module 4.

[0033] The high-temperature superconducting magnet 1 has multiple stacked magnetic bodies 11; the data acquisition module 2 has a temperature detection module 21 for acquiring the temperature of each of the magnetic bodies 11; the quench protection module 3 has a heating module 31 for heating the magnetic bodies 11 and an energy release module 32 for releasing the stored energy of the high-temperature superconducting magnet 1; the control module 4 is used to receive the temperature data from the temperature detection module 21 and control the start and stop of the heating module 31 and the energy release module 32 based on the temperature data.

[0034] The quench protection system of the present invention, through the coordinated operation of real-time temperature monitoring, active quench control and safe energy release, can effectively protect the high-temperature superconducting magnet 1 under abnormal conditions, avoid irreversible damage to the high-temperature superconducting magnet 1 due to quench, and significantly improve the reliability and safety of the high-temperature superconducting magnet 1.

[0035] Specifically, such as Figure 2 As shown, the magnetic body 11 can be a single-pancake structure, with multiple magnetic bodies 11 stacked at intervals to form a complete high-temperature superconducting magnet 1. Of course, as... Figure 3 As shown, the magnetic body of the present invention can also adopt a double-pancake structure design. In this double-pancake structure, each double-pancake structure includes two windings 111, and the two windings 111 are closely arranged to form a complete magnetic body 11'. Multiple double-pancake structures are stacked vertically at a predetermined interval to form the main structure of the entire high-temperature superconducting magnet 1.

[0036] The data acquisition module 2 includes a temperature detection module 21, which can collect temperature information of each magnetic body 11. In this embodiment, as shown... Figure 2 As shown, the temperature detection module 21 is disposed between two adjacent single-disc magnetic bodies 11, or, as... Figure 3 As shown, the temperature detection module 21 is set between two adjacent double-panel magnetic bodies 11', and through precise positioning, it can ensure accurate sensing of the actual operating temperature of the magnetic bodies 11 / magnetic bodies 11'.

[0037] In this invention, the temperature detection module 21 can employ a high-precision temperature sensor, such as a distributed optical fiber sensor. The distributed optical fiber sensor can be a single-mode fiber or a multi-mode fiber, which can monitor the temperature change of the magnetic body 11 / magnetic body 11' in real time during operation, providing an accurate temperature data basis for quench protection.

[0038] The quench protection module 3 comprises two core components: a heating module 31 and an energy dissipation module 32. Among them, in... Figure 2 In the high-temperature superconducting magnet 1 with a single-pancake structure shown, the heating module 31 is disposed on the upper surface of the magnet body 11. In this embodiment, the temperature detection module 21 is disposed on the lower surface of the magnet body 11. The heating module 31 and the temperature detection module 21 can be separated by an isolation structure 12 to ensure that the accuracy of temperature monitoring is not affected by the heating process. Figure 3 In the high-temperature superconducting magnet 1 with a double-pancake structure shown, the heating module 31 is disposed between the two windings 111 of the magnet body 11' so as to actively heat the magnet body 11 / magnetic body 11'.

[0039] In this embodiment, as Figure 1 As shown, the heating module 31 includes multiple heating resistors 311 connected in series and a second switching device 312. The operating state of the multiple heating resistors 311 is controlled by controlling the on / off state of the second switching device 312. The second switching device 312 can be, for example, a solid-state relay.

[0040] like Figure 4 As shown, the heating module 31 includes a heating structure 313 and two insulating layers 314 located on both sides of the heating structure 313. The heating structure 313 has heating bands that are arranged in a reciprocating pattern to form the complete heating structure 313. This reciprocating arrangement design ensures the heating uniformity of the heating module 31 and avoids local overheating. At the same time, the reciprocating heating bands form a U-shaped pattern, which can counteract the mutual inductance between the magnets, allowing the heating structure 313 to reach the required heating temperature immediately, resulting in high heating efficiency. The insulating layers 314 located on both sides of the heating structure 313 can prevent adverse effects on adjacent structures during the heating process, while also improving heating efficiency.

[0041] In this embodiment, the heating band is made of a conductive material, such as a conductive material with high resistivity, like a thin stainless steel strip; the insulating layer 314 is made of a polyimide material or a flexible polymer material, such as a polyimide composite film or a flexible polymer material like G10.

[0042] Furthermore, in this invention, the surface of the insulating layer 314 that contacts the magnetic body 11 / magnetic body 11' is coated with a highly thermally conductive insulating silicone grease layer to reduce the interfacial contact thermal resistance.

[0043] See also Figure 2 and Figure 3 As shown, in one feasible embodiment, such as Figure 2 In the high-temperature superconducting magnet 1 with a single-disc structure shown, the heating module 31 is disposed between two adjacent single-disc structure magnet bodies 11; in another feasible embodiment, such as Figure 3In the high-temperature superconducting magnet 1 with a double-pancake structure shown, the heating module 31 is disposed between the two windings 111 of the magnet body 11' with the double-pancake structure. Through precise positioning, it can ensure accurate sensing of the actual working temperature of the windings 111.

[0044] In this invention, the shape of the heating structure 313 can be designed according to the shape of the high-temperature superconducting magnet 1, for example... Figure 5 The heating structure 313 shown is annular in shape. Figure 6 The heating structure 313 shown is D-shaped. Figure 7 The heating structure 313 shown is racetrack shaped, and the present invention does not limit the shape of the heating structure 313.

[0045] like Figure 1 As shown, the energy dissipation module 32 is connected in parallel with the high-temperature superconducting magnet 1. The energy dissipation module 32 includes an energy dissipation resistor 321 and a first switching device 322 that controls whether the energy dissipation resistor 321 is connected. This energy dissipation module 32 can safely dissipate the energy of the high-temperature superconducting magnet 1. When the high-temperature superconducting magnet 1 loses its quench, the first switching device 322 connects the energy dissipation resistor 321 to the circuit, allowing the magnetic energy stored in the high-temperature superconducting magnet 1 to be safely released as heat through the energy dissipation resistor 321, preventing damage to the high-temperature superconducting magnet 1 from sudden energy release. The first switching device 322 can be, for example, a relay.

[0046] In this embodiment, the control module 4 is a high-speed real-time processing unit based on an FPGA, responsible for receiving and processing temperature data and performing nanosecond-level logic judgments. The control module 4 is electrically connected to the temperature detection module 21, the first switching device 322, and the second switching device 312, respectively. It can receive temperature data collected by the temperature detection module 21 and control the start and stop of the heating module 31 and the energy dissipation module 32 based on the temperature data. The control module 4 has a built-in intelligent control algorithm that can analyze the changing trend of temperature data in real time and determine the working state of the high-temperature superconducting magnet 1.

[0047] The working principle of the quench protection system of the present invention is as follows: When the temperature data collected by the temperature detection module 21 is greater than the normal operating temperature of the high-temperature superconducting magnet 1, the control module 4 determines that the high-temperature superconducting magnet 1 may be about to quench or has already begun to quench. At this time, the control module 4 controls the heating module 31 to actively heat the high-temperature superconducting magnet 1. The heating resistor 311 is connected through the second switching device 312, so that the heating structure 313 generates heat, accelerating the quench process of the high-temperature superconducting magnet 1. The purpose of active heating is to enable the high-temperature superconducting magnet 1 to complete the quench transition quickly in a controllable manner, avoiding uneven heating and mechanical stress caused by local quench.

[0048] When the high-temperature superconducting magnet 1 completely loses quench, the control module 4 immediately controls the energy removal module 32 to work. The energy removal resistor 321 is connected to the circuit through the first switching device 322 to safely remove energy from the high-temperature superconducting magnet 1 that has lost quench. The huge magnetic energy stored in the high-temperature superconducting magnet 1 is converted into heat energy and released at a controllable rate through the energy removal resistor 321, ensuring the safety and controllability of the entire quench process.

[0049] The quench protection system of the present invention can effectively protect the high-temperature superconducting magnet 1 under abnormal conditions through the coordinated operation of real-time temperature monitoring, active quench control and safe energy release, and avoid irreversible damage to the high-temperature superconducting magnet 1 due to quench, thus significantly improving the reliability and safety of the high-temperature superconducting magnet 1.

[0050] Implementation Method 2

[0051] like Figures 1 to 9 As shown, the present invention also provides a quench protection method for a high-temperature superconducting magnet. This quench protection method effectively prevents the high-temperature superconducting magnet 1 from being damaged due to abnormal temperature during operation through precise temperature monitoring and intelligent quench protection strategy.

[0052] The quench protection method includes: Step S1: Collect the temperature of the high-temperature superconducting magnet 1; Step S2: Determine whether the current temperature of the high-temperature superconducting magnet 1 exceeds the normal operating temperature value of the high-temperature superconducting magnet 1; Step S3: Based on the difference between the current temperature of the high-temperature superconducting magnet 1 and the normal operating temperature, perform quench protection on the high-temperature superconducting magnet 1.

[0053] This invention, through its active quench protection method, can effectively prevent uncontrollable local quenching of the high-temperature superconducting magnet 1 due to temperature fluctuations, significantly improving the safety and reliability of the operation of the high-temperature superconducting magnet 1 and extending the service life of the equipment.

[0054] Specifically, before proceeding to step S1, a preset temperature threshold is set via the host computer, for example, a preset threshold of 80K (this preset threshold can be determined based on the superconducting critical temperature of the high-temperature superconducting magnet 1). At this time, the control module 4 performs self-tests on the temperature detection module 21, the heating module 31, and the energy dissipation module 32. By outputting test signals to each module and receiving feedback signals, it confirms that each component is connected normally and functions properly.

[0055] In step S1, when collecting the temperature of the high-temperature superconducting magnet 1, in practical applications, the operating temperature of the high-temperature superconducting magnet 1 is monitored in real time by a temperature detection module 21 installed inside the high-temperature superconducting magnet 1.

[0056] In step S2, it is determined whether the current temperature of the high-temperature superconducting magnet 1 exceeds the normal operating temperature value of the high-temperature superconducting magnet 1.

[0057] Specifically, the high-temperature superconducting magnet 1 can operate normally in the liquid nitrogen temperature range (77K). The control module 4 compares the current temperature collected in real time with this preset threshold and makes a quick judgment through a digital comparator circuit. The judgment time does not exceed 10 milliseconds.

[0058] In this embodiment, the control module 4 amplifies and filters the collected temperature signal before transmitting it to its FPGA integrated chip, which then performs real-time analysis and processing on the received temperature signal.

[0059] In step S3, quench protection is implemented for the high-temperature superconducting magnet 1 based on the difference between its current temperature and a preset threshold. The control system calculates the temperature difference between the current temperature and the preset threshold and determines the corresponding protection strategy based on this difference.

[0060] During the specific protection execution process, under one possible scenario, if the current temperature of the high-temperature superconducting magnet 1 is less than a preset threshold, the system returns to step S2 to continue determining whether the current temperature of the high-temperature superconducting magnet 1 exceeds the preset threshold. When the temperature is below 77K, it indicates that the high-temperature superconducting magnet 1 is still in a normal superconducting state, and the system continues to maintain the monitoring mode, re-determining the temperature status every millisecond to ensure timely response to temperature changes.

[0061] In another possible scenario, if the current temperature of the high-temperature superconducting magnet 1 is greater than or equal to a preset threshold, then the high-temperature superconducting magnet 1 is subjected to heating treatment.

[0062] Specifically, when the temperature of the high-temperature superconducting magnet 1 reaches or exceeds 80K, the system immediately activates the heating module 31 to actively heat the high-temperature superconducting magnet 1. This heating module 31 can uniformly raise the temperature of the high-temperature superconducting magnet 1 from 77K to above 90K within a short time, for example, within 50 milliseconds. This seemingly anomalous heating process is actually an active quench protection strategy. By rapidly increasing the temperature, the superconducting material completely loses its superconductivity, avoiding hotspot concentration and magnet damage caused by localized quench.

[0063] Furthermore, during the heating process of the starting heating module 31, the high-temperature superconducting magnet 1 is heated until the high-temperature superconducting magnet 1 loses its superheat.

[0064] Specifically, the system continuously monitors temperature changes and magnetic field decay during the heating process. In one feasible embodiment, when the current temperature exceeds a preset threshold, it confirms that the magnet has completely lost quench. The entire heating quench process is typically completed within 10 seconds, ensuring that the magnetic energy stored in the magnet is safely released and preventing the superconducting coil from burning out due to localized overheating.

[0065] In another feasible embodiment, the quench protection method further includes voltage monitoring of the high-temperature superconducting magnet 1. When the current voltage of the high-temperature superconducting magnet 1 exceeds a voltage threshold, quench protection is applied to the high-temperature superconducting magnet 1. That is, when the current temperature is detected to exceed a preset threshold, the judgment is made in conjunction with the real-time detected voltage signal. When the voltage signal exceeds a certain threshold, it is determined that the high-temperature superconducting magnet 1 has quenched, and the high-temperature superconducting magnet 1 is then heated.

[0066] Furthermore, after heating the high-temperature superconducting magnet 1, the high-temperature superconducting magnet 1 is subjected to energy removal treatment.

[0067] Specifically, control module 4 controls the first switching device 322 to connect, causing the energy-discharging resistor 321 to connect to the circuit and form a parallel circuit with the high-temperature superconducting magnet 1. The energy stored in the high-temperature superconducting magnet 1 is quickly discharged through the energy-discharging resistor 321. During this process, control module 4 controls the voltage switch 323 to disconnect.

[0068] In this invention, during the heating and energy dissipation process, while the temperature detection module 21 continuously detects the temperature signals of various parts of the high-temperature superconducting magnet 1, the control module 4 monitors the voltage changes in the circuit in real time. When the voltage at the magnet end drops to 0 (i.e., energy dissipation is complete), the control module 4 can control the heating module 31 to stop working and control the first switching device 322 to open, so that the energy dissipation resistor 321 is disconnected from the circuit. At this time, the host computer records the relevant data of this quench protection (including quench trigger time, highest temperature, energy dissipation duration, etc.).

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. 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 quench protection system for a high-temperature superconducting magnet, characterized in that, The quench protection system includes: High-temperature superconducting magnets have multiple stacked magnetic bodies; The data acquisition module includes a temperature detection module for acquiring the temperature of each of the magnetic bodies; The quench protection module includes a heating module for heating the magnetic body and an energy release module for releasing the stored energy of the high-temperature superconducting magnet. The control module is used to receive temperature data from the temperature detection module and control the start and stop of the heating module and the start and stop of the energy dissipation module based on the temperature data.

2. The quench protection system for high-temperature superconducting magnets according to claim 1, characterized in that, The magnetic body has a single-pane structure, and the temperature detection module is disposed on one of the surfaces of the magnetic body.

3. The quench protection system for high-temperature superconducting magnets according to claim 2, characterized in that, The heating module is disposed on the other surface of the magnetic body, and the heating module between two adjacent magnetic bodies is separated from the temperature detection module by an isolation structure.

4. The quench protection system for a high-temperature superconducting magnet according to claim 1, characterized in that, The magnetic body has a double-pancake structure, and the temperature detection module is positioned between two adjacent magnetic bodies.

5. The quench protection system for a high-temperature superconducting magnet according to claim 4, characterized in that, The heating module is disposed between the two windings of the magnetic body.

6. The quench protection system for a high-temperature superconducting magnet according to any one of claims 1 to 5, characterized in that, The heating module includes a heating structure and two insulating layers sandwiched on both sides of the heating structure. The heating structure has heating bands that are arranged in a reciprocating pattern to form the heating structure.

7. The quench protection system for a high-temperature superconducting magnet according to claim 6, characterized in that, The heating band is made of a conductive material; the insulating layer is made of polyimide or a flexible polymer.

8. The quench protection system for a high-temperature superconducting magnet according to claim 6, characterized in that, The surface of the insulating layer that contacts the magnetic body is coated with a layer of highly thermally conductive insulating silicone grease.

9. The quench protection system for a high-temperature superconducting magnet according to claim 6, characterized in that, The temperature detection module is a distributed fiber optic sensor.

10. The quench protection system for a high-temperature superconducting magnet according to claim 4, characterized in that, When the temperature data is greater than the normal operating temperature of the high-temperature superconducting magnet, the control module controls the heating module to heat the high-temperature superconducting magnet until the high-temperature superconducting magnet loses its superconductivity.

11. The quench protection system for a high-temperature superconducting magnet according to claim 10, characterized in that, The control module controls the energy removal module to remove energy from the high-temperature superconducting magnet that has lost its quench.

12. The quench protection system for a high-temperature superconducting magnet according to claim 1, characterized in that, The energy removal module is connected in parallel with the high-temperature superconducting magnet. It includes an energy removal resistor and a first switching device that controls whether the energy removal resistor is connected. When the high-temperature superconducting magnet loses its quench, the energy removal resistor is connected to the circuit through the first switching device.

13. The quench protection system for a high-temperature superconducting magnet according to claim 1, characterized in that, The heating module includes multiple heating resistors and a second switching device connected in series. When it is determined that the high-temperature superconducting magnet may be about to lose quench or has already begun to lose quench, the heating resistors are switched on by the second switching device to actively heat the high-temperature superconducting magnet.

14. A method for quench protection of a high-temperature superconducting magnet, characterized in that, The quench protection method includes: The temperature of a high-temperature superconducting magnet was collected. Determine whether the current temperature of the high-temperature superconducting magnet exceeds the normal operating temperature value of the high-temperature superconducting magnet; Based on the difference between the current temperature of the high-temperature superconducting magnet and the normal operating temperature, quench protection is provided for the high-temperature superconducting magnet.

15. The quench protection method for a high-temperature superconducting magnet according to claim 14, characterized in that, The method of providing quench protection for the high-temperature superconducting magnet based on the difference between its current temperature and its normal operating temperature includes: If the current temperature of the high-temperature superconducting magnet is greater than or equal to the normal operating temperature, then the high-temperature superconducting magnet is subjected to heat treatment. If the current temperature of the high-temperature superconducting magnet is less than the normal operating temperature value, then it is further determined whether the current temperature of the high-temperature superconducting magnet exceeds the normal operating temperature value.

16. The quench protection method for a high-temperature superconducting magnet according to claim 14 or 15, characterized in that, Also includes: The high-temperature superconducting magnet is heated until it loses its superconductivity.

17. The quench protection method for a high-temperature superconducting magnet according to claim 16, characterized in that, Also includes: After the high-temperature superconducting magnet loses its quench, it undergoes energy removal treatment.

18. The quench protection method for a high-temperature superconducting magnet according to claim 14, characterized in that, It also includes voltage monitoring of the high-temperature superconducting magnet, and when the current voltage of the high-temperature superconducting magnet exceeds the voltage threshold, it provides quench protection for the high-temperature superconducting magnet.

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