CN112557974A - Method and system for testing impact recovery characteristics of high-temperature superconducting tape - Google Patents
Method and system for testing impact recovery characteristics of high-temperature superconducting tape Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 claims description 4
- BTGZYWWSOPEHMM-UHFFFAOYSA-N [O].[Cu].[Y].[Ba] Chemical compound [O].[Cu].[Y].[Ba] BTGZYWWSOPEHMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 12
- 238000010791 quenching Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005312 nonlinear dynamic Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1238—Measuring superconductive properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The application belongs to the technical field of research on characteristics of high-temperature superconducting tapes, and particularly relates to a method and a system for testing impact recovery characteristics of a high-temperature superconducting tape. According to the method and the system for testing the impact recovery characteristics of the high-temperature superconducting tape, the delay time of the delay relay is set, so that the small current output by the constant-current stabilizing source flows through the sample of the high-temperature superconducting tape after the impact current of the impact current source is changed into 0, the characteristics of the high-temperature superconducting tape in the impact process are not influenced, the change conditions of parameters such as voltage and current in the recovery process can be immediately tested after the impact is finished, and the impact characteristics and the recovery characteristics of the high-temperature superconducting tape can be synchronously and accurately measured. The method can analyze the impact recovery characteristic of the high-temperature superconducting tape according to the voltage change curve measured in the recovery process; and the surface temperature of the high-temperature superconducting tape is used for assisting analysis, so that the accuracy of the recovery characteristic test is improved.
Description
Technical Field
The application relates to the technical field of high-temperature superconducting tape characteristic research, in particular to a method and a system for testing impact recovery characteristics of a high-temperature superconducting tape.
Background
At present, because of a part of excellent physical properties of superconducting materials, the application of the superconducting materials in the power grid power industry is becoming more and more extensive. Particularly in the aspect of power transmission, the superconducting material is the hot door of the research personnel in the industry. In order to better utilize the excellent performance of the superconducting material and improve the efficiency and stability of power grid transportation, more intensive characteristic research on the superconducting material is needed.
For example, in the field of power transmission, the flexible direct-current power transmission technology shows more flexible, environment-friendly and economic advantages compared with the traditional power transmission technology, and is expected to become an important technical means for large-scale access and large-scale interconnection of renewable energy sources in the future. However, the damping of the flexible direct-current power grid is very low, the rising rate of current at the initial stage of a fault is far larger than that of an alternating-current system, and the conventional circuit breaker needs a certain action time for breaking and clearing the fault. Therefore, superconducting power equipment such as a superconducting current limiter, a superconducting motor, and a superconducting cable in a dc system is likely to receive a large current impact when a power grid fails.
The high-temperature superconducting tape is a core part of superconducting power equipment, and the performance of the superconducting power equipment is determined to a certain extent by the capability of bearing large current impact and recovery of the high-temperature superconducting tape. In the process of impact and recovery of the high-temperature superconducting tape, various electrical, magnetic and thermal physical parameters such as current, magnetic field, temperature, resistivity and the like show nonlinear dynamic changes. At present, the impact characteristics of the high-temperature superconducting tape are researched more at home and abroad, but the research on the recovery characteristics of the high-temperature superconducting tape is not deep. The existing high-temperature superconducting tape impact recovery characteristic testing technology only measures the temperature change of the superconducting tape in the recovery process, but the temperature change of the superconducting tape in the quench recovery process has time delay, so the measured result is not very accurate.
An accurate method for measuring the impact recovery characteristics of the superconducting strip is urgently needed, and the blank in the aspect of research on the recovery characteristics is filled.
Disclosure of Invention
The application provides a method and a system for testing impact recovery characteristics of a high-temperature superconducting tape, which are used for solving the problem that an accurate method and an accurate system for measuring the impact recovery characteristics of the superconducting tape are lacked at present.
The technical scheme adopted by the application is as follows:
in a first aspect of the present application, a method for testing impact recovery characteristics of a high temperature superconducting tape is provided, which includes the following steps:
placing a sample of a high-temperature superconducting strip to be detected in a low-temperature Dewar filled with liquid nitrogen, connecting impact current sources at two ends, connecting a constant-current stabilized current source and a time delay relay in series and then connecting the constant-current stabilized current source and the time delay relay at two ends of the sample, connecting an oscilloscope at two ends of the sample, arranging a first current clamp in a current loop of the impact current source, arranging a second current clamp in the current loop of the constant-current stabilized current source, and arranging a temperature sensor on the surface of the sample;
setting the delay time of a delay relay to enable the small current output by the constant-current stabilized current source to flow through the sample after the impact current of the impact current source is changed into 0;
measuring voltages at two ends of the sample by using an oscilloscope to obtain voltage data at two ends of the sample, measuring an impulse current by using a first current clamp, measuring a small current by using a second current clamp, and measuring temperature data of the sample by using a temperature sensor;
acquiring temperature data measured by a temperature sensor through temperature acquisition equipment;
and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
Optionally, the high-temperature superconducting tape to be detected is an yttrium barium copper oxide high-temperature superconducting tape.
Optionally, the impact current of the impact current source is a current in a range from above the critical current of the high-temperature superconducting tape to 2000A, and the small current is a small current not exceeding 5A.
Alternatively, the low temperature dewar of liquid nitrogen may maintain a low temperature of 77K at 1 atmosphere without an external heat source.
Optionally, the impact current source and the constant current stabilizing source are connected in parallel to the sample to obtain two ends, and the sample is electrified sequentially.
Optionally, in the step of recording and analyzing the voltage data, the inrush current data, the small current data, and the temperature data, a LabVIEW program control host is used for recording and analyzing.
Optionally, the oscilloscope and the temperature acquisition device are provided with a LabVIEW interface, and the LabVIEW program control host implements remote, synchronous and measurement of each device through LabVIEW programming.
Optionally, the setting of the delay time of the delay relay, so that the small current output by the constant-current regulated current source flows through the sample after the impact current of the impact current source becomes 0, includes:
the delay time of the delay relay enables the small current output by the constant-current stabilized current source to flow through the sample after the impulse current of the impulse current source is changed to 0-0.1 s.
In another aspect of the present application, there is provided a system for testing impact recovery characteristics of a high temperature superconducting tape, including: the device comprises a low-temperature Dewar filled with liquid nitrogen, a high-temperature superconducting strip sample to be detected, an impact current source, a constant-current steady-current source, a time delay relay, an oscilloscope, a temperature sensor, temperature acquisition equipment and a program control host;
the high-temperature superconducting strip sample to be detected is arranged in a low-temperature Dewar filled with liquid nitrogen, two ends of the high-temperature superconducting strip sample to be detected are connected with an impact current source, then the constant-current stabilizing source is connected with the time delay relay in series and then connected with two ends of the sample, two ends of the high-temperature superconducting strip sample to be detected are connected with an oscilloscope, a first current clamp is arranged in a current loop of the impact current source, a second current clamp is arranged in the current loop of the constant-current stabilizing source, and a temperature sensor is arranged on the surface of the high-temperature superconducting strip sample to be detected;
the time delay relay is configured to: setting the delay time of a delay relay to enable the small current output by the constant-current stabilized current source to flow through the sample after the impact current of the impact current source is changed into 0;
the oscilloscope is configured to: measuring the voltage at two ends of the sample by an oscilloscope to obtain voltage data at two ends of the sample;
the first current clamp is configured to: collecting a rush current in a current loop of a rush current source, the second current clamp configured to: collecting small current in a current loop of a constant current and current stabilizing source;
the temperature acquisition device is configured to: collecting temperature data measured by a temperature sensor;
the programming host is configured to: and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
Optionally, the program-controlled host is a LabVIEW program-controlled host, the oscilloscope and the temperature acquisition device are provided with LabVIEW interfaces, and the LabVIEW program-controlled host implements remote, synchronous and measurement of each device through LabVIEW programming.
The technical scheme of the application has the following beneficial effects:
the method and the system for testing the impact recovery characteristic of the high-temperature superconducting tape have the following two advantages:
the method has the advantages that through setting the delay time of the delay relay, the small current output by the constant-current stabilizing source flows through the sample of the high-temperature superconducting strip after the impact current of the impact current source is changed into 0, so that the characteristics of the high-temperature superconducting strip in the impact process are not influenced, the change conditions of parameters such as voltage and current in the recovery process can be immediately tested after the impact is finished, and the impact characteristics and the recovery characteristics of the high-temperature superconducting strip are synchronously and accurately measured.
After the impulse current of the high-temperature superconducting tape becomes 0, the quench resistance may not become 0, so that after the low current is switched in, the recovery time of the high-temperature superconducting tape can be judged according to the voltage change curve measured in the recovery process; meanwhile, the method for judging the recovery time by measuring the surface temperature of the high-temperature superconducting tape is adopted, so that the results obtained by the two judging methods can be verified mutually, and the accuracy of the recovery characteristic test is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a R-t curve of the superconducting tape with a through-flow time of 12 ms;
FIG. 3 is a T-T curve of the superconducting tape at a current amplitude 810A;
FIG. 4 is a T-T curve of the superconducting tape at a current amplitude of 925A;
illustration of the drawings:
the device comprises a low-temperature Dewar 1, a high-temperature superconducting strip sample to be detected 2, a current source 3, a first current clamp 31, a constant-current stabilizing source 4, a second current clamp 41, a time delay relay 5, an oscilloscope 6, a temperature acquisition device 7 and a program control host 8.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
In a first aspect of the present application, a method for testing impact recovery characteristics of a high temperature superconducting tape is provided, which includes the following steps:
placing a sample 2 of a high-temperature superconducting strip to be detected in a low-temperature Dewar 1 filled with liquid nitrogen, connecting impact current sources 3 at two ends, connecting a constant-current stabilized current source 4 and a time delay relay 5 in series and then connecting the two ends of the sample, connecting an oscilloscope 6 at two ends of the sample, arranging a first current clamp 31 in a current loop of the impact current source 3, arranging a second current clamp 41 in the current loop of the constant-current stabilized current source 4, and arranging a temperature sensor on the surface of the sample;
setting the delay time of a delay relay 5 to enable the small current output by the constant-current stabilized current source 4 to flow through the sample after the impact current of the impact current source 3 is changed into 0;
measuring the voltage at two ends of the sample by using an oscilloscope 6 to obtain voltage data at two ends of the sample, measuring the impact current by using a first current clamp 31, measuring the small current by using a second current clamp 41, and measuring the temperature data of the sample by using a temperature sensor;
collecting temperature data measured by the temperature sensor through a temperature collecting device 7;
and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
In this embodiment, the oscilloscope 6 may be used to display the voltage across the sample, and the oscilloscope 6 may also display the current flowing across the sample. In addition, in the present application, unless otherwise specified, "sample" refers to "a sample of the high temperature superconducting tape to be measured. "
Optionally, the high-temperature superconducting tape to be detected is an yttrium barium copper oxide high-temperature superconducting tape.
Optionally, the inrush current of the inrush current source 3 is a current in a range from above the critical current of the high-temperature superconducting tape to 2000A, and the small current is a small current not exceeding 5A.
Alternatively, the cryogenic dewar 1 of liquid nitrogen may maintain a low temperature of 77K at 1 atmosphere without an external heat source.
Optionally, the impact current source 3 and the constant current stabilizing source 4 are connected in parallel to the sample to obtain two ends, and the sample is electrified sequentially.
Optionally, in the step of recording and analyzing the voltage data, the inrush current data, the small current data, and the temperature data, a LabVIEW program control host 8 is used for recording and analyzing.
Optionally, the oscilloscope 6 and the temperature acquisition device 7 are provided with LabVIEW interfaces, and the LabVIEW program control host 8 implements remote, synchronous and measurement of each device through LabVIEW programming.
Optionally, the step of setting the delay time of the delay relay 5 to make the small current output by the constant current stabilizing source 4 flow through the sample after the impact current of the impact current source 3 becomes 0 includes:
the delay time of the delay relay 5 enables the small current output by the constant current stabilizing source 4 to flow through the sample after the impact current of the impact current source 3 is changed to 0-0.1 s.
In another aspect of the present application, there is provided a system for testing impact recovery characteristics of a high temperature superconducting tape, including: the device comprises a low-temperature Dewar 1 filled with liquid nitrogen, a high-temperature superconducting strip sample to be detected, an impact current source 3, a constant-current steady-current source 4, a time delay relay 5, an oscilloscope 6, a temperature sensor, a temperature acquisition device 7 and a program control host 8;
the high-temperature superconducting strip sample to be detected is arranged in a low-temperature Dewar 1 filled with liquid nitrogen, two ends of the high-temperature superconducting strip sample to be detected are connected with an impact current source 3, then a constant-current stabilizing source 4 is connected with a time delay relay 5 in series and then connected with two ends of the sample, two ends of the high-temperature superconducting strip sample to be detected are connected with an oscilloscope 6, a first current clamp 31 is arranged in a current loop of the impact current source 3, a second current clamp 41 is arranged in a current loop of the constant-current stabilizing source 4, and a temperature sensor is arranged on the surface of the high-temperature superconducting strip sample to be detected;
the time delay relay 5 is configured to: setting the delay time of a delay relay 5 to enable the small current output by the constant-current stabilized current source 4 to flow through the sample after the impact current of the impact current source 3 is changed into 0;
the oscilloscope 6 is configured to: measuring the voltage at two ends of the sample by using an oscilloscope 6 to obtain voltage data at two ends of the sample;
the first current clamp 31 is configured to: collecting a rush current in a current loop of a rush current source 3, the second current clamp 41 being configured to: collecting small current in a current loop of a constant current and current stabilizing source 4;
the temperature acquisition device 7 is configured to: collecting temperature data measured by a temperature sensor;
the host computer 8 is configured to: and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
Fig. 1 is a schematic structural diagram of the present embodiment. By setting the delay relay 5 and the delay time of the delay relay 5, the small current output by the constant-current stabilized current source 4 flows through the sample after the impact current of the impact current source 3 is changed into 0, so that the characteristics of the high-temperature superconducting strip in the impact process are not influenced, the change conditions of parameters such as voltage, current and the like in the recovery process can be immediately tested after the impact is finished, and the synchronous and accurate measurement of the impact characteristics and the recovery characteristics of the high-temperature superconducting strip is realized. The program-controlled host 8 in this embodiment has a function of recording voltage data, inrush current data, small current data, and temperature data, and also has a function of analyzing the impact recovery characteristics of the high-temperature superconducting tape according to the data. The impact recovery characteristics of the high-temperature superconducting tape at least comprise recovery time of impact, voltage, current and temperature change in the impact process, state analysis of the high-temperature superconducting tape converted from a superconducting state to a non-superconducting state and further converted to the superconducting state, and the like.
Optionally, the program-controlled host 8 is a LabVIEW program-controlled host 8, the oscilloscope 6 and the temperature acquisition device 7 are provided with LabVIEW interfaces, and the LabVIEW program-controlled host 8 implements remote, synchronous and measurement of each device through LabVIEW programming.
In order to further verify the technical effect of the embodiment of the present application, the following experiment is performed according to the technical scheme of the embodiment, and the specific experimental steps are as follows:
TABLE 1
| Strip Properties | Specific parameters |
| Manufacturer(s) | Samri |
| Model number | ST-1908-31AB-3 |
| Average thickness | 0.24±0.05mm |
| Average width | 12.0±0.1mm |
| Thickness of silver layer | 2.0±0.5μm |
| Thickness of copper layer | 5.0±2.0μm |
| Thickness of base band | 65±3μm |
| Thickness of stainless steel layer | 80×2μm |
| Thickness of superconducting layer | 1μm |
| Critical current of | 200±20A |
| Room temperature resistor | 0.11Ω/m |
The method comprises the following steps: the experimental equipment comprises ST-1908-31AB-3 second generation YBCO high temperature superconducting tapes (specific parameters are shown in table 1) produced by Suzhou new material research institute (Samri), a low temperature Dewar 1, 2kV and 40KA, a frequency-adjustable impact current source 3, a constant current stabilizing source 4 for flowing 3A, a time delay relay 5, a current clamp, a river DL850 oscilloscope 6, a PT100 temperature sensor, a Keithley 2700 universal meter and a LabVIEW program control host 8; the method comprises the steps of placing a sample strip to be detected in a low-temperature Dewar 1 filled with liquid nitrogen, connecting impact current sources 3 at two ends, connecting a constant current stabilizing source 4 and a delay relay 5 in series and then connecting the constant current stabilizing source and the delay relay to two ends of the sample strip, and setting the delay time of the delay relay 5 to enable a small current output by the constant current stabilizing source 4 to flow through the strip after the impact current is changed into 0.
Step two: the DL850 oscilloscope 6 directly measures the voltage at two ends of the strip material, and measures the current waveform through the current clamp; the PT100 temperature sensor is tightly attached to the surface of the strip, and temperature data are collected and recorded through a 2700 multimeter. The experimental principle and wiring diagram are shown in fig. 1.
Step three: the LabVIEW program control host 8 directly controls the oscilloscope 6 and the temperature acquisition equipment 7, and realizes remote control of testing and acquisition of various parameters. According to the measured voltage and current wave curves, the resistance wave curve can be obtained from R ═ U/I. Fig. 2 shows the waveform curves of the strip quenching resistance with time under the conditions that the impact current is 711A, 714A, 810A and 924A and the through-flow time is 12 ms. It can be seen that when the amplitude of the impact current is 711A and 714A, and the through-current time is 12ms, the quench resistance of the strip material is reduced to 0 before 12ms, that is, the strip material has recovered the superconducting state, only current flows, and no voltage exists at the two ends of the strip material; when the amplitude of the impact current is 810A and 925A, and the through-current time is 12ms, the quenching resistance of the strip material is not reduced to 0 after 12ms, the impact current is already 0 at this time, only the constant-current steady-current source 4 of 3A supplies current, and as can be seen from fig. 2, the quenching resistance of the strip material in the recovery process is measured.
Step four: referring to FIG. 2, the R-t curve of the strip is shown at a through-flow time of 12 ms. The time from when the inrush current drops to 0 to when the quench resistance drops to 0 is the recovery time measured based on the voltage criterion. Fig. 3 and 4 are T-T curves of the strip under current amplitudes 810A and 925A, respectively, and a surface temperature change curve of the strip measured at a through-flow time of 12ms, which can monitor the surface temperature change of the strip and obtain a recovery time measured based on a temperature criterion. Based on the comparison of the recovery time measured by the voltage criterion and the temperature criterion, the impact recovery characteristic of the high-temperature superconducting tape can be described by combining the quench resistance change curve.
The method and the system for testing the impact recovery characteristic of the high-temperature superconducting tape have the following two advantages:
by setting the delay time of the delay relay 5, the small current output by the constant-current stabilizing source 4 flows through the sample of the high-temperature superconducting tape after the impact current of the impact current source 3 is changed into 0, so that the characteristics of the high-temperature superconducting tape in the impact process are not influenced, the change conditions of parameters such as voltage and current in the recovery process can be immediately tested after the impact is finished, and the impact characteristics and the recovery characteristics of the high-temperature superconducting tape can be synchronously and accurately measured.
After the impulse current of the high-temperature superconducting tape becomes 0, the quench resistance may not become 0, so that after the low current is switched in, the recovery time of the high-temperature superconducting tape can be judged according to the voltage change curve measured in the recovery process; meanwhile, the method for judging the recovery time by measuring the surface temperature of the high-temperature superconducting tape is adopted, so that the results obtained by the two judging methods can be verified mutually, and the accuracy of the recovery characteristic test is improved.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. A method for testing impact recovery characteristics of a high-temperature superconducting tape is characterized by comprising the following steps:
placing a sample of a high-temperature superconducting strip to be detected in a low-temperature Dewar filled with liquid nitrogen, connecting impact current sources at two ends, connecting a constant-current stabilized current source and a time delay relay in series and then connecting the constant-current stabilized current source and the time delay relay at two ends of the sample, connecting an oscilloscope at two ends of the sample, arranging a first current clamp in a current loop of the impact current source, arranging a second current clamp in the current loop of the constant-current stabilized current source, and arranging a temperature sensor on the surface of the sample;
setting the delay time of a delay relay to enable the small current output by the constant-current stabilized current source to flow through the sample after the impact current of the impact current source is changed into 0;
measuring voltages at two ends of the sample by using an oscilloscope to obtain voltage data at two ends of the sample, measuring an impulse current by using a first current clamp, measuring a small current by using a second current clamp, and measuring temperature data of the sample by using a temperature sensor;
acquiring temperature data measured by a temperature sensor through temperature acquisition equipment;
and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
2. The method for testing impact recovery characteristics of a high temperature superconducting tape according to claim 1, wherein the high temperature superconducting tape to be tested is an yttrium barium copper oxide high temperature superconducting tape.
3. The method for testing impact recovery characteristics of a high temperature superconducting tape according to claim 1, wherein the impact current of the impact current source is a current in a range of from above a critical current of the high temperature superconducting tape to 2000A, and the small current is a small current of not more than 5A.
4. The method for testing impact recovery characteristics of a high temperature superconducting tape according to claim 1, wherein the low temperature dewar of liquid nitrogen can maintain a low temperature of 77K at 1 atm without an external heat source.
5. The method for testing the impact recovery characteristics of the high-temperature superconducting tape according to claim 1, wherein the impact current source and the constant-current stabilized current source are connected in parallel to the sample to obtain two ends, and the sample is electrified in sequence.
6. The method for testing impact recovery characteristics of a high temperature superconducting tape according to claim 1, wherein the step of recording and analyzing the voltage data, the impact current data, the small current data, and the temperature data is performed by using a LabVIEW programmer.
7. The method for testing impact recovery characteristics of a high-temperature superconducting tape according to claim 6, wherein the oscilloscope and the temperature acquisition device are provided with LabVIEW interfaces, and the LabVIEW program control host machine realizes remote, synchronous and measurement of each device through LabVIEW programming.
8. The method for testing the impact recovery characteristics of the high-temperature superconducting tape according to claim 1, wherein the step of setting the delay time of the delay relay so that the small current output by the constant-current steady-current source flows through the sample after the impact current of the impact current source becomes 0 comprises the steps of:
the delay time of the delay relay enables the small current output by the constant-current stabilized current source to flow through the sample after the impulse current of the impulse current source is changed to 0-0.1 s.
9. A high temperature superconducting tape impact recovery characteristic test system, comprising: the device comprises a low-temperature Dewar filled with liquid nitrogen, a high-temperature superconducting strip sample to be detected, an impact current source, a constant-current steady-current source, a time delay relay, an oscilloscope, a temperature sensor, temperature acquisition equipment and a program control host;
the high-temperature superconducting strip sample to be detected is arranged in a low-temperature Dewar filled with liquid nitrogen, two ends of the high-temperature superconducting strip sample to be detected are connected with an impact current source, then the constant-current stabilizing source is connected with the time delay relay in series and then connected with two ends of the sample, two ends of the high-temperature superconducting strip sample to be detected are connected with an oscilloscope, a first current clamp is arranged in a current loop of the impact current source, a second current clamp is arranged in the current loop of the constant-current stabilizing source, and a temperature sensor is arranged on the surface of the high-temperature superconducting strip sample to be detected;
the time delay relay is configured to: setting the delay time of a delay relay to enable the small current output by the constant-current stabilized current source to flow through the sample after the impact current of the impact current source is changed into 0;
the oscilloscope is configured to: measuring the voltage at two ends of the sample by an oscilloscope to obtain voltage data at two ends of the sample;
the first current clamp is configured to: collecting a rush current in a current loop of a rush current source, the second current clamp configured to: collecting small current in a current loop of a constant current and current stabilizing source;
the temperature acquisition device is configured to: collecting temperature data measured by a temperature sensor;
the programming host is configured to: and recording and analyzing the voltage data, the inrush current data, the small current data and the temperature data.
10. The system for testing impact recovery characteristics of a high temperature superconducting tape according to claim 9, wherein the mainframe is a LabVIEW mainframe, the oscilloscope is provided with a LabVIEW interface with the temperature acquisition device, and the LabVIEW mainframe realizes remote, synchronous and measurement of each device through LabVIEW programming.
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