本文選題：高溫超導帶材　切入點：臨界電流　出處：《北京交通大學》2017年碩士論文　論文類型：學位論文

【摘要】：高溫超導帶材的臨界電流特性直接關系著高溫超導電力設備的設計、制造以及應用。復合超導帶材比單根超導帶材具有更高的載流量,可以達到kA級別。臨界電流作為超導體最重要的參數(shù)之一,對復合帶材的臨界電流特性進行研究有著非常重要的意義。超導電力設備良好的穩(wěn)定性是超導電力設備安全運行的可靠保障,高溫超導帶材的穩(wěn)定性是另一個必須考慮的重要因素,因此,對超導帶材穩(wěn)定性的研究同樣具有重要的意義。本文首先根據(jù)ReBCO高溫超導帶材臨界電流的計算模型,計算得到了不同磁感應強度(0T-0.9T)和磁場角度(0°、30°、60°、90°)條件下的臨界電流。根據(jù)磁場下高溫超導帶材臨界電流測試實驗原理,設計并搭建了基于LabVIEW的臨界電流測試平臺。在77K溫度下,對5mm寬ReBCO高溫超導帶材進行了臨界電流測試,并與理論計算結果進行了對比,分析了磁場對臨界電流和超導帶材n值得影響。為了能夠得到高溫超導帶材的交流傳輸能力,本文通過類比交流損耗測試方法和臨界電流定義,實驗測得交流條件下4mm寬AMSC和Superpower高溫超導帶材的伏安特性。采用有效值法和切線法分析了兩種高溫超導帶材在30Hz-540Hz頻率下交流載流能力的頻率特性。對高溫超導帶材的交流載流能力做了一個初步的實驗與分析。利用Comsol軟件對Roebel復合超導帶材進行了建模仿真,得到了 Roebel復合帶材的磁場分布;利用臨界電流計算公式計算得到了 Roebel復合帶材的臨界電流。根據(jù)Roebel復合帶材臨界電流測試實驗原理,搭建了基于LabVIEW軟件的Roebel復合超導帶材的臨界電流實驗平臺,并測試了 Roebel復合超導帶材的臨界電流,將理論結果與實驗結果進行了對比分析。最后,對ReBCO高溫超導帶材的失超特性進行了理論分析,設計并搭建了基于LabVIEW的ReBCO高溫超導帶材失超傳播特性測試系統(tǒng)。借助該測試系統(tǒng),對ReBCO超導帶材和Roebel復合超導帶材進行了失超特性實驗,得到了 ReBCO超導帶材和Roebel復合帶材的最小失超能、失超傳播速度等特性,并對實驗結果進行了分析。
[Abstract]:The critical current characteristics of HTS tapes are directly related to the design, manufacture and application of HTS power equipment. The critical current is one of the most important parameters of superconductors. It is of great significance to study the critical current characteristics of composite strip. The good stability of superconducting power equipment is a reliable guarantee for the safe operation of superconducting power equipment. The stability of HTS tapes is another important factor which must be considered. Therefore, it is also of great significance to study the stability of HTS tapes. In this paper, first of all, according to the calculation model of critical current of ReBCO HTS tapes, The critical current under the conditions of different magnetic induction intensity (0T-0.9T) and magnetic field angle (0 擄~ 30 擄~ 60 擄~ 90 擄) is calculated. According to the experimental principle of measuring critical current of HTS tapes under magnetic field, a critical current testing platform based on LabVIEW is designed and built. The critical current of 5mm wide ReBCO HTS tape is measured and compared with the theoretical calculation results. The influence of magnetic field on the critical current and superconducting tape n is analyzed. In this paper, the method of AC loss measurement and the definition of critical current are compared. The volt-ampere characteristics of 4mm wide AMSC and Superpower HTS tapes under AC condition were experimentally measured. The frequency characteristics of AC current carrying capacity of two HTS tapes at frequencies of 30Hz-540Hz were analyzed by RMS method and tangent method. A preliminary experiment and analysis of the AC current-carrying capacity of the material is carried out. The Roebel composite superconducting tape is modeled and simulated by using Comsol software. The magnetic field distribution of Roebel composite strip is obtained, and the critical current of Roebel composite strip is calculated by using critical current formula. According to the experimental principle of critical current measurement of Roebel composite strip, The critical current test platform of Roebel composite superconducting tape based on LabVIEW software is built, and the critical current of Roebel composite superconducting tape is tested. The theoretical results are compared with the experimental results. In this paper, the characteristics of ReBCO HTS tapes are theoretically analyzed, and the measurement system of ReBCO HTS tapes is designed and built based on LabVIEW. The characteristics of ReBCO superconducting tape and Roebel composite superconducting tape are tested. The characteristics of ReBCO superconducting tape and Roebel composite strip are obtained, such as the minimum loss of energy and the propagation speed of the lost superconducting tape. The experimental results are analyzed.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM26

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本文編號：1595015