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近十几年来,随着高温超导材料制备技术日益成熟,实用长度Bi系和Y系高温超导线材已经实现了商业化生产,在高温超导电力技术领域研发取得了重要进展,相应的各种超导电力装置实现了示范运行,为实现其商业化运行奠定了技术基础.但是,由于高温超导材料本身具有弱连接、晶粒特性、次相、缺陷等内禀特性,实用长度高温超导带材的临界电流和n值指数不可能做到完全相同.高温超导线材的临界电流和n值指数对超导电力装置的安全运行、稳定性、运行效率等具有重要影响,因此临界电流和n值是描述高温超导带材均匀性的2个重要参量,也是衡量实用高温超导带材质量的重要参数指标.重点介绍实用高温超导线材临界电流和n值指数非接触测量技术的技术进展,提出评价实用高温超导带材临界电流和n值指数均匀性的统计分析方法,为高温超导电力装置的设计、运行提供重要参考依据.
In recent ten years, with the high temperature superconducting material preparation technology matures, practical length Bi and Y series high temperature superconducting wire has achieved commercial production, research and development in the field of high temperature superconducting power technology has made important progress, the corresponding The superconducting power device has realized the demonstration operation and laid the technical foundation for the realization of its commercial operation.But the high temperature superconducting material itself has the characteristics of weak connection, grain properties, secondary phase, defects and other intrinsic characteristics, the practical length of high temperature super The critical current and the n-value index of the conducting tape can not be exactly the same.The critical current and n-value index of high-temperature superconducting wire have an important influence on the safe operation, stability and operating efficiency of the superconducting power device, so the critical current And n are two important parameters to describe the homogeneity of high temperature superconducting tapes, and also an important parameter to measure the quality of practical high temperature superconducting tapes. The emphasis is put on the practical application of high temperature superconducting wire critical current and n value index non-contact measurement technology Technical progress, proposed evaluation of practical high temperature superconducting tape critical current and n-value index uniformity of statistical analysis methods for high-temperature superconducting power device design, transport Provide important reference.