具有反应速度快、限流程度深优势的电阻型超导限流器是当前限流器领域研究的前沿和热点。电阻型超导限流器失超过程中产生气泡严重影响液氮的绝缘特性。现有的关于气泡对液氮击穿特性影响的研究多通过注入或加热产生气泡的方式，与超导带材失超气泡快速增长、激烈变化的情况不同，更缺乏自动重合闸要求下超导带材失超-恢复-再失超过程中积累气泡对液氮击穿特性影响的研究。项目基于电阻型超导限流器的实际工况，施加短路电流使超导带材失超产生激增气泡，研究限流器失超过程中激增气泡的数量、运动速度、积聚形式和分布规律；研究超导带材失超-恢复-再失超过程中气泡的积累效应和相互作用，获得气泡产生-消减-再产生过程对液氮绝缘击穿特性的影响规律；建立超导失超电阻模型和超导电磁热耦合模型，仿真分析限流器内部电场分布和击穿场强，揭示液氮绝缘击穿机理，提出电阻型超导限流器内部绝缘设计准则，为超导限流器的绝缘设计提供理论依据和技术支撑。

Resistive type superconducting fault current limiters (R-SFCLs) with advantages of fast response speed and deep current limit ability are the frontiers and hotspots of research in the field of current limiters. During the quench of the R-SFCLs, quench generating bubbles seriously affect the insulation properties of liquid nitrogen. Current research of the effect of the bubbles on the liquid nitrogen breakdown characteristics is mostly studied through injecting or heating generating bubbles, which is different from the case when the bubbles rapidly growing and drastically changing during quench of superconducting tapes. And there is a lack of research on the effect of bubble accumulation on liquid nitrogen breakdown characteristics in the process of quench-recovery-re-quench of superconducting tape under the requirement of automatic reclosing. The project is based on the actual working conditions of the R-SFCLs. Quench generating bubbles are produced by applying short circuit current to the superconducting tapes to quench the tapes. The amount, velocity, accumulation form and the distribution of the quench generating bubbles during the quenching process of the R-SFCLs are studied. The accumulation effect and interaction of bubbles during the quench-recovery-re-quench process of superconducting tape are analyzed. The effect of bubble generation-decrease-regeneration process on the breakdown characteristics of liquid nitrogen insulation is obtained. The superconducting quenching resistance model and the superconducting electromagnetic thermal coupling model are established. The electric field distribution and breakdown field strength of the R-SFCLs are simulated. The mechanism of liquid nitrogen insulation breakdown is revealed and the internal insulation design criteria of the R-SFCLs are proposed. These studies provide theoretical basis and technical support for the insulation design of superconducting fault current limiter.