A method and system for testing quench propagation in rebcO tapes

Abstract

The application discloses a REBCO tape loss of superconductivity propagation test method and system, and relates to the technical field of superconducting material testing. The REBCO tape loss of superconductivity propagation test method gradually applies current and monitors voltage and temperature data to analyze the propagation characteristics and recovery process of the loss of superconductivity event. After the loss of superconductivity occurs, the system records and reduces the current in real time to analyze the recovery capacity of the tape. In combination with the loss of superconductivity propagation index and the recovery capacity index, corresponding safety test measures are performed for different test stages. The application comprehensively and dynamically analyzes the loss of superconductivity event of the REBCO tape by introducing the loss of superconductivity propagation index. The prior art usually only records the voltage and temperature data when the loss of superconductivity event occurs, and does not consider the speed and range of the loss of superconductivity propagation in the tape. By combining real-time voltage, temperature data and current changes and other factors, the propagation index can quantify the propagation process of the loss of superconductivity from one point to other points, and overcomes the limitations of the traditional method.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of superconducting material testing, in particular to a REBCO tape quench propagation testing method and system. BACKGROUND

[0002] REBCO tape is an important high-temperature superconducting material, widely used in superconducting magnets, energy transmission, particle accelerators and other high-tech fields. The stability of its superconducting performance is the core index of its application performance. The quench phenomenon of the tape usually refers to the loss of superconducting characteristics of the superconducting tape under certain conditions, which becomes a conventional resistance material, resulting in a sharp decline in its current transmission capacity. The quench process not only affects the operation of the equipment, but also may cause damage to the equipment, therefore, evaluating and testing the performance of the tape during the quench process is crucial to ensure its reliability and stability.

[0003] The limitations of the prior art at least include the following problems, the prior art mainly focuses on the instantaneous voltage and temperature data recording of the quench event, but lacks evaluation of the quench event propagation process in the tape, quench is not a local instantaneous event, the propagation speed and range of quench have important influence on the performance and stability of the tape, but the prior art fails to consider how to quantify these dynamic characteristics, it is difficult to accurately evaluate the overall performance of the tape in the quench state, and the current testing method fails to comprehensively evaluate the recovery process of the tape after quench, especially the recovery speed and temperature and current changes during the recovery process, it fails to evaluate the ability of the tape to recover to the normal superconducting state through quantitative indicators, which leads to difficulties in scientifically judging whether the tape can recover smoothly after quench, and it is also difficult to understand the potential risks in the recovery process. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a REBCO tape quench propagation testing method and system, which solves the problem of lack of dynamic evaluation of the REBCO tape quench propagation process and recovery process in the prior art, and difficulty in accurately predicting the long-term stability of the tape.

[0005] To achieve the above object, the application is implemented by the following technical solutions: a REBCO tape loss of superconductivity propagation test method, comprising the following steps: connecting the REBCO tape to be tested to a test device; gradually applying current to the REBCO tape to be tested by a current source, and recording and analyzing the corresponding loss of superconductivity state data when the loss of superconductivity event occurs; analyzing the loss of superconductivity propagation index of the REBCO tape to be tested based on the loss of superconductivity state data; after the loss of superconductivity event occurs, gradually reducing the applied current to the REBCO tape to be tested by the current source, and recording the corresponding recovery data and analyzing the corresponding recovery capability index when the recovery event occurs; based on the loss of superconductivity propagation index and the recovery capability index, performing corresponding safety test measures on the REBCO tape to be tested.

[0006] Further, the specific steps of judging the occurrence of the loss of superconductivity event are as follows: when the current is applied to the REBCO tape to be tested, the voltage data and the temperature data thereof are detected and recorded in real time; when the voltage of the REBCO tape to be tested exceeds the preset critical voltage, it is marked as a pseudo loss of superconductivity event; when the voltage of the REBCO tape to be tested exceeds the preset loss of superconductivity voltage, it is marked as a loss of superconductivity event.

[0007] Further, the voltage data includes the tape voltage values at several times, the temperature data includes the tape temperature values at several times, and the loss of superconductivity state data includes the time point of the occurrence of the pseudo loss of superconductivity event, the time point of the occurrence of the loss of superconductivity event, and the loss of superconductivity propagation range.

[0008] Further, the specific steps of analyzing the loss of superconductivity propagation range are as follows: reading the tape temperature values at several time points before the occurrence of the pseudo loss of superconductivity event, and performing mean value analysis to obtain the initial temperature value of the REBCO tape to be tested before the loss of superconductivity; based on the temperature data, sorting to obtain the maximum tape temperature value and the minimum tape temperature value of the REBCO tape to be tested, and analyzing the corresponding maximum temperature change amplitude; obtaining the tape length value of the REBCO tape to be tested, and reading the tape temperature value at the time of the occurrence of the loss of superconductivity event; comprehensively analyzing the tape length value of the REBCO tape to be tested, the initial temperature value before the loss of superconductivity, the maximum temperature change amplitude, and the tape temperature value at the time of the occurrence of the loss of superconductivity to obtain the loss of superconductivity propagation range of the REBCO tape to be tested.

[0009] Further, the specific steps of analyzing the loss of superconductivity propagation index of the REBCO tape to be tested are as follows: based on the time point of the occurrence of the pseudo loss of superconductivity event and the time point of the occurrence of the loss of superconductivity event, analyzing the loss of superconductivity propagation duration of the REBCO tape to be tested; reading the preset loss of superconductivity voltage, and comprehensively analyzing the maximum temperature change amplitude, the loss of superconductivity propagation range, and the loss of superconductivity propagation duration of the REBCO tape to be tested to obtain the loss of superconductivity propagation index of the REBCO tape to be tested.

[0010] Further, the specific steps of judging the occurrence of the recovery event are as follows: after the occurrence of the quench event, gradually reducing the current applied to the REBCO tape to be tested, and monitoring and recording the recovery data in real time; when the voltage of the REBCO tape to be tested recovers to the preset recovery voltage, it is marked as a pseudo-recovery event; when the voltage of the REBCO tape to be tested recovers to the preset normal superconducting state voltage, it is marked as a recovery event.

[0011] Further, the recovery data includes the time point when the pseudo-recovery event occurs, the time point when the recovery event occurs, the tape recovery voltage values and tape recovery temperature values at several time points between the occurrence of the pseudo-recovery event and the occurrence of the recovery event.

[0012] Further, the specific steps of analyzing the corresponding recovery capability index are as follows: based on the tape recovery voltage values and tape recovery temperature values at several time points between the occurrence of the pseudo-recovery event and the occurrence of the recovery event, analyzing the maximum change amplitude of the recovery voltage and the maximum change amplitude of the recovery temperature of the REBCO tape to be tested; based on the time point when the pseudo-recovery event occurs and the time point when the recovery event occurs, analyzing the recovery time length of the REBCO tape to be tested; based on the maximum change amplitude of the recovery voltage, the maximum change amplitude of the recovery temperature, and the recovery time length, analyzing the recovery capability index of the REBCO tape to be tested.

[0013] Further, based on the quench propagation index and the recovery capability index, the specific steps of performing corresponding safety test measures on the REBCO tape to be tested are as follows: matching and analyzing the quench propagation index and the recovery capability index of the REBCO tape to be tested with a plurality of preset test interval sets respectively, each test interval set including a quench propagation interval and a recovery capability interval respectively, and corresponding to a safety test strategy; based on the safety test strategy corresponding to the quench propagation index and the recovery capability index being in a certain test interval set, performing corresponding safety test measures on the REBCO tape to be tested.

[0014] A REBCO tape quench propagation test system, comprising: a connection unit for connecting the REBCO tape to be tested to a test device; a current application unit for gradually applying current to the REBCO tape to be tested by a current source, and recording corresponding quench state data when a quench event occurs; a quench analysis unit for analyzing the quench propagation index of the REBCO tape to be tested based on the quench state data; a current reduction unit for gradually reducing the applied current to the REBCO tape to be tested by the current source after the quench event occurs; a recovery analysis unit for recording corresponding recovery data when a recovery event occurs, and analyzing the corresponding recovery capability index; and a safety test unit for performing corresponding safety test measures on the REBCO tape to be tested based on the quench propagation index and the recovery capability index.

[0015] The present application has the following beneficial effects:

[0016] (1) The REBCO tape quench propagation test method can comprehensively and dynamically analyze the quench event of the REBCO tape by introducing the quench propagation index. The prior art usually only records voltage and temperature data when a quench event occurs, without considering the speed and range of quench propagation from the initial position of the tape to other positions. By introducing the propagation index, the present application can quantify the propagation process of quench from one point to other points by real-time monitoring of voltage, temperature data, and combining factors such as current change, effectively avoiding the limitations of traditional methods. Especially in the case of multiple quench events in the tape, the use of the propagation index can help evaluate the influence range and degree of quench.

[0017] (2) The REBCO tape quench propagation test method quantitatively evaluates the recovery process after quench by the recovery capability index, making up for the deficiency of the prior art that fails to analyze the tape recovery capability in detail. After a quench event, traditional methods often have difficulty in timely evaluating whether the tape can recover stably. By introducing multiple factors such as recovery voltage, recovery temperature, and recovery current, the present application accurately quantifies the change amplitude in the recovery process. By real-time monitoring of temperature change and current change during the recovery process, as well as recovery time, the present application can provide a scientific evaluation standard for the recovery speed and stability of the tape. By combining multiple data indicators in the recovery process, the present application can help engineers timely understand whether the tape can recover to a normal superconducting state, thereby avoiding potential performance degradation or equipment damage risks during the recovery process.

[0018] (3) The REBCO tape quench propagation test method combines the quench propagation index and the recovery ability index to formulate a corresponding safety test strategy based on multidimensional data, greatly improving the precision and flexibility of REBCO tape testing. Traditional test methods generally use fixed test strategies, ignoring the specific circumstances and changing diversity of the tape, which may result in inaccurate test results or difficulty in dealing with special situations. However, the present application is based on real-time monitoring data, analyzes the changes in the quench propagation index and the recovery ability index, and matches the test results with a set of pre-set test intervals, thereby executing the most appropriate safety test measures for tapes in different situations. For example, when the quench propagation is severe and the recovery ability is weak, the application can specifically reduce the current application rate and strictly control the temperature change to ensure that the tape is not damaged too much. This not only improves the flexibility of testing, but also enhances the safety protection of the tape in different states.

[0019] (4) The REBCO tape quench propagation test system integrates multiple functional units such as current application units, quench analysis units, and recovery analysis units, realizes an automated testing process, and greatly improves testing efficiency and accuracy. Traditional test methods usually rely on manual operation and single instrument monitoring, which are easily affected by human error, leading to instability of test results. However, the system automatically controls current application, records and analyzes data in real time, realizes accurate data collection and analysis throughout the process, automatically records multiple data such as voltage and temperature when a quench event occurs, quickly calculates the quench propagation index through the quench analysis unit, provides scientific and accurate evaluation indicators for testing, and automatically executes current reduction during the recovery process through the current reduction unit, ensuring the continuity and efficiency of the testing process. This automated testing process not only reduces the possibility of human intervention, but also improves the reliability of test results, making it suitable for high-precision and large-scale experimental testing needs, greatly improving the efficiency of REBCO tape performance evaluation.

[0020] Of course, implementing any product of the present application does not necessarily require all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A REBCO tape quench propagation test method flowchart of the present application.

[0022] Figure 2 A REBCO tape quench propagation test method flowchart of the present application.

[0023] Figure 3 A REBCO tape quench propagation test system block diagram of the present application. DETAILED DESCRIPTION

[0024] Referring to Figure 1 The embodiment of the present application provides a technical scheme: a REBCO tape quench propagation test method, comprising the following steps: connecting the REBCO tape to be tested to a test device, wherein the test device comprises a current source, a voltage sensor, a temperature sensor, a magnetic field sensor and a data recording system; gradually applying current to the REBCO tape to be tested by the current source, and recording and analyzing the corresponding quench state data when a quench event occurs; based on the quench state data, analyzing the quench propagation index of the REBCO tape to be tested; after the quench event occurs, gradually reducing the applied current to the REBCO tape to be tested by the current source, and recording the corresponding recovery data when a recovery event occurs, and analyzing the corresponding recovery capability index; based on the quench propagation index and the recovery capability index, performing corresponding safety test measures on the REBCO tape to be tested.

[0025] Specifically, the specific steps of judging the occurrence of the quench event are as follows: when the current is applied to the REBCO tape to be tested, the voltage data and the temperature data thereof are detected and recorded in real time (until the quench event occurs); when the voltage of the REBCO tape to be tested exceeds the preset critical voltage, it is marked as a pseudo quench event; when the voltage of the REBCO tape to be tested exceeds the preset quench voltage, it is marked as a quench event.

[0026] The voltage data comprises a plurality of tape voltage values at different times, the temperature data comprises a plurality of tape temperature values at different times, and the quench state data comprises the time point when the pseudo quench event occurs, the time point when the quench event occurs, and the quench propagation range.

[0027] The specific steps of analyzing the quench propagation range are as follows: reading the tape temperature values at a plurality of time points before the occurrence of the pseudo quench event, and performing mean value analysis to obtain the initial temperature value of the REBCO tape to be tested before quenching; based on the temperature data, sorting to obtain the maximum tape temperature value and the minimum tape temperature value of the REBCO tape to be tested, and analyzing the corresponding maximum temperature change amplitude; obtaining the tape length value of the REBCO tape to be tested, and reading the tape temperature value when the quench event occurs; comprehensively analyzing the tape length value of the REBCO tape to be tested, the initial temperature value before quenching, the maximum temperature change amplitude, and the tape temperature value when the quench event occurs to obtain the quench propagation range of the REBCO tape to be tested.

[0028] Wherein, the specific formula for calculating the quench propagation range of the REBCO tape to be tested is as follows: ; wherein, , , , , In order, the quench propagation range of the REBCO tape to be tested, the tape temperature value when the quench event occurs, the initial temperature value before the quench, the maximum temperature change amplitude, and the tape length value.

[0029] In the present embodiment, by recording and analyzing the temperature changes of the tape before and after the quench event, the initial temperature, the maximum temperature change amplitude, and the temperature value when the quench event occurs can be accurately obtained. These data not only help researchers to better understand the propagation process of the quench phenomenon, but also quantify the propagation range of the quench, thereby providing a more accurate evaluation of the performance stability and long-term reliability of the tape. By calculating the quench propagation range, combined with the length value and temperature data of the tape, a more accurate prediction of the stability and safety of the tape can be provided. For example, by measuring the temperature change amplitude of the tape, local overheating phenomena that may occur during the quench process can be better identified, thereby effectively predicting potential failures of the tape. Furthermore, this analysis method enables the testing of REBCO tapes to go beyond traditional voltage and current data recording, and enables a comprehensive analysis of the overall quench propagation, providing data support for the optimized design and application of the tape.

[0030] Specifically, as shown in Figure 2 The specific steps for analyzing the quench propagation index of the REBCO tape to be tested are as follows: based on the time point when the pseudo quench event occurs and the time point when the quench event occurs, the quench propagation duration of the REBCO tape to be tested is analyzed; the preset quench voltage is read and combined with the maximum temperature change amplitude, the quench propagation range, and the quench propagation duration of the REBCO tape to be tested for comprehensive analysis to obtain the quench propagation index of the REBCO tape to be tested.

[0031] The specific formula for calculating the quench propagation index of the REBCO tape to be tested is as follows: ; wherein, , , , In order, the quench propagation index of the REBCO tape to be tested, the quench propagation duration, the quench propagation range, the maximum temperature change amplitude, The preset quench voltage.

[0032] In this embodiment, by introducing the propagation index of the quenching event, a more accurate and comprehensive evaluation method is provided for the test of the REBCO tape. The propagation of the quenching event is not only a local instantaneous phenomenon, but also expands with time and space, which has a profound impact on the performance of the tape. By combining the time point of the pseudo quenching event and the time point of the quenching event, the quenching propagation time can be calculated, that is, the time taken for the quenching phenomenon to propagate from the initial position to other positions. By combining the maximum temperature change amplitude of the tape, the quenching propagation range, and the quenching propagation time, the performance of the tape under the quenching state can be comprehensively analyzed. Combined with the preset quenching voltage, these indicators can be effectively integrated into a quenching propagation index to quantify the impact of quenching propagation and help testers more accurately evaluate the performance of the tape in actual application. This method breaks the traditional single recording of quenching events and improves the comprehensiveness and accuracy of the test. The introduction of the quenching propagation index enables the test of the tape to go beyond the level of instantaneous data recording and dynamically and systematically analyze the propagation process of the quenching phenomenon of the tape, thereby providing a more scientific evaluation of the long-term safety and stability of the tape.

[0033] Specifically, the specific steps of judging the occurrence of the recovery event are as follows: after the occurrence of the quenching event, gradually reduce the current applied to the REBCO tape to be tested, and monitor and record the recovery data in real time (stop when the recovery event occurs); when the voltage of the REBCO tape to be tested recovers to the preset recovery voltage, mark it as a pseudo recovery event; when the voltage of the REBCO tape to be tested recovers to the preset normal superconducting state voltage, mark it as a recovery event.

[0034] The recovery data includes the time point when the pseudo recovery event occurs, the time point when the recovery event occurs, the tape recovery voltage values and tape recovery temperature values at several time points between the occurrence of the pseudo recovery event and the occurrence of the recovery event.

[0035] The specific steps of analyzing the corresponding recovery capability index are as follows: based on the tape recovery voltage values and tape recovery temperature values at several time points between the occurrence of the pseudo recovery event and the occurrence of the recovery event, analyze the maximum change amplitude of the recovery voltage and the maximum change amplitude of the recovery temperature of the REBCO tape to be tested; based on the time point when the pseudo recovery event occurs and the time point when the recovery event occurs, analyze the recovery time of the REBCO tape to be tested; based on the maximum change amplitude of the recovery voltage, the maximum change amplitude of the recovery temperature, and the recovery time, analyze the recovery capability index of the REBCO tape to be tested.

[0036] The specific formula for calculating the recovery capability index of the REBCO tape to be tested is as follows: ; wherein, , , , The recovery capacity index, the recovery time, the maximum change range of the recovery voltage, and the maximum change range of the recovery temperature of the REBCO tape to be tested, in sequence.

[0037] In the embodiment, the recovery capacity index is introduced to provide a more accurate and comprehensive evaluation method for the test of the REBCO tape. After the quenching event occurs, whether the tape can effectively recover to the normal superconducting state is an important indicator for evaluating the long-term stability and safety. In the prior art, the evaluation of the recovery process of the tape is usually simple, and it is difficult to accurately quantify the key data such as the voltage and temperature changes in the recovery process. The present application can comprehensively and accurately evaluate the recovery capacity of the tape by monitoring the voltage and temperature changes of the tape in real time, in combination with the recovery time. By recording the time point when the pseudo-recovery event occurs and the time point when the recovery event occurs, as well as the voltage and temperature changes in the recovery process, the present application can calculate the maximum voltage change range and the maximum temperature change range in the recovery process, and analyze the recovery capacity index of the tape through these data. This index provides a quantitative evaluation indicator for the recovery speed and stability of the tape. Especially in the case of multiple quenching and recovery, the present application can accurately predict whether the tape has sufficient recovery capacity, avoiding the problem of insufficient recovery capacity evaluation in the traditional method.

[0038] Specifically, based on the quench propagation index and the recovery capacity index, the specific steps of performing corresponding safety test measures on the REBCO tape to be tested are as follows: the quench propagation index and the recovery capacity index of the REBCO tape to be tested are matched and analyzed with a plurality of preset test interval sets, respectively. Each test interval set includes a quench propagation interval and a recovery capacity interval, and corresponds to a safety test strategy, including but not limited to the following examples:

[0039] High quench propagation index and low recovery capacity index:

[0040] Test strategy: Strictly control the temperature change of the tape and limit the current application speed. Increase the response speed of the temperature control system during current application to prevent performance degradation of the tape due to excessive temperature.

[0041] Specific measures: During the test, if the current application speed is too fast and exceeds the set range, immediately take measures to reduce the current speed and increase the cooling system load; use high-precision voltage and temperature sensors to monitor the tape state in real time to ensure that the temperature does not exceed the critical temperature.

[0042] Low quench propagation index and high recovery capacity index:

[0043] Test strategy: A more relaxed test strategy can be adopted, allowing the tape to recover at a higher current and temperature, but fine-tuning of the temperature and current is performed at the same time.

[0044] Specific measures: appropriately increase the current application rate to ensure that the tape can quickly recover to the superconducting state. Real-time monitoring of tape voltage, temperature and current data, once the data approaches the quench voltage or temperature threshold, immediately adjust automatically to ensure the stability of the test;

[0045] Based on the quench propagation index and the recovery ability index being in a preset certain test interval set, the corresponding safety test measures are performed on the REBCO tape to be tested.

[0046] In this embodiment, by matching the quench propagation index and the recovery ability index with the preset test interval, a flexible and dynamic safety test strategy is provided, specific safety control measures are formulated for different test results. The traditional test method usually adopts unified safety measures, which is difficult to adjust the test strategy according to the different performance of the tape, which may cause safety hazards or inaccurate test results in the test process. The present application introduces the quench propagation index and the recovery ability index, automatically adjusts the test strategy in different test intervals, optimizes the test measures in real time according to the actual performance of the tape, ensures the stability and safety of the test under different conditions, for example, in the case of high quench propagation index and low recovery ability, the system will strictly control the temperature change of the tape and limit the current application speed to reduce the influence of high temperature on the performance of the tape; in the case of low quench propagation index and high recovery ability, the system can adopt a more relaxed test strategy, moderately increase the current application speed to speed up the recovery process of the tape. This flexible adjustment strategy not only improves the accuracy of the test, but also maximizes the safety of the tape and avoids excessive heating or unnecessary damage.

[0047] Please refer to Figure 3 The embodiment of the present application provides a technical solution: a REBCO tape quench propagation test system, comprising: a connection unit for connecting the REBCO tape to be tested to the test equipment;

[0048] A current application unit for gradually applying current to the REBCO tape to be tested by a current source, and analyzing and recording the corresponding quench state data when a quench event occurs; a quench analysis unit for analyzing the quench propagation index of the REBCO tape to be tested based on the quench state data; a current reduction unit for gradually reducing the applied current to the REBCO tape to be tested by the current source after the quench event occurs; a recovery analysis unit for recording the corresponding recovery data and analyzing the corresponding recovery ability index when a recovery event occurs; a safety test unit for performing corresponding safety test measures on the REBCO tape to be tested based on the quench propagation index and the recovery ability index.

[0049] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the present disclosure without departing from the spirit and scope of the application. Accordingly, it is intended that the appended claims include all such modifications and variations as fall within the scope of the present application.

[0050] It is apparent that those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. It is therefore intended that the present application cover all such changes and modifications that are within its scope.

Claims

1. A method for testing the propagation of quench in REBCO tape, characterized in that, Includes the following steps: Connect the REBCO tape to be tested to the testing equipment; A current source is used to gradually apply current to the REBCO tape under test, and the corresponding quench state data is analyzed and recorded when a quench event occurs. Based on the quench state data, the quench propagation index of the REBCO tape to be tested is analyzed; After a quench event occurs, the applied current to the REBCO tape under test is gradually reduced through a current source, and when a recovery event occurs, the corresponding recovery data is recorded and the corresponding recovery capability index is analyzed. Based on the quench propagation index and the recovery capability index, corresponding safety testing measures were performed on the REBCO tape to be tested. The specific steps for determining whether a go-out event has occurred are as follows: When current is applied to the REBCO tape under test, its voltage and temperature data are detected and recorded in real time. When the voltage of the REBCO tape under test exceeds the preset critical voltage, it is marked as a false quench event; When the voltage of the REBCO tape under test exceeds the preset quench voltage, it is marked as a quench event; Voltage data includes strip voltage values ​​at several times, temperature data includes strip temperature values ​​at several times, and quench status data includes the time point when the false quench event occurs, the time point when the quench event occurs, and the quench propagation range. The specific steps for analyzing the range of queuing propagation are as follows: Read the strip temperature values ​​at several time points before the pseudo-quench event occurs, and perform mean analysis to obtain the initial temperature value of the REBCO strip under test before quench. Based on the temperature data, the maximum and minimum strip temperature values ​​of the REBCO strips to be tested were obtained by sorting, and the corresponding maximum temperature change range was analyzed. Obtain the strip length value of the REBCO strip to be tested, and read the strip temperature value when the quench event occurs; The strip length, initial temperature before quench, maximum temperature change, and strip temperature at the time of quench event of the REBCO strip under test are comprehensively analyzed to obtain the quench propagation range of the REBCO strip under test. The specific steps for analyzing the quench propagation index of the REBCO tape to be tested are as follows: Based on the time points of the pseudo-quench event and the quench event, the quench propagation time of the REBCO tape under test is analyzed. The preset quench voltage is read, and combined with the maximum temperature change range, quench propagation range and quench propagation time of the REBCO tape under test, a comprehensive analysis is performed to obtain the quench propagation index of the REBCO tape under test. Based on the quench propagation index and the recovery capability index, the specific steps for performing corresponding safety testing measures on the REBCO tape to be tested are as follows: The quench propagation index and recovery capability index of the REBCO tape to be tested are matched and analyzed with several preset test interval sets. Each test interval set includes a quench propagation interval and a recovery capability interval, and each corresponds to a safety test strategy. Based on the safety testing strategy corresponding to the quench propagation index and recovery capability index falling within a preset test interval set, the REBCO tape to be tested is subjected to corresponding safety testing measures.

2. The REBCO tape quench propagation test method according to claim 1, characterized in that, The specific steps to determine if a recovery event has occurred are as follows: After a quench event occurs, the current applied to the REBCO tape under test is gradually reduced, and the recovery data is monitored and recorded in real time. When the voltage of the REBCO tape under test recovers to the preset recovery voltage, it is marked as a pseudo recovery event; A recovery event is marked when the voltage of the REBCO tape under test recovers to the preset normal superconducting state voltage.

3. The REBCO tape quench propagation test method according to claim 2, characterized in that, The recovery data includes the time point when the pseudo-recovery event occurred, the time point when the recovery event occurred, and the strip recovery voltage and temperature values ​​at several time points between the pseudo-recovery event and the recovery event.

4. The REBCO tape quench propagation test method according to claim 3, characterized in that, The specific steps for analyzing the corresponding recovery capacity index are as follows: Based on the strip recovery voltage and recovery temperature values ​​at several time points between the occurrence of the pseudo-recovery event and the occurrence of the recovery event, the maximum variation range of the recovery voltage and the maximum variation range of the recovery temperature of the REBCO strip under test are analyzed. Based on the time points of the pseudo-recovery event and the recovery event, the recovery time of the REBCO strip under test is analyzed. The recovery capability index of the REBCO tape under test is analyzed based on the maximum change range of recovery voltage, the maximum change range of recovery temperature, and the recovery time.

5. A REBCO tape quench propagation testing system, employing the REBCO tape quench propagation testing method according to any one of claims 1-4, characterized in that, include: The connection unit is used to connect the REBCO tape to be tested to the testing equipment; The current application unit is used to gradually apply current to the REBCO tape under test through a current source, and analyze and record the corresponding quench state data when a quench event occurs. The quench analysis unit is used to analyze the quench propagation index of the REBCO tape under test based on quench state data. The current reduction unit is used to gradually reduce the applied current to the REBCO tape under test through a current source after a quench event occurs. The recovery analysis unit is used to record the corresponding recovery data and analyze the corresponding recovery capability index when a recovery event occurs. The safety testing unit is used to perform corresponding safety testing measures on the REBCO tape to be tested based on the quench propagation index and the recovery capability index.

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