As research and production technologies for high-temperature superconducting (HTS) materials have become increasingly mature, many high-efficiency and low-weight electrical machines made of HTS conductors have been successfully manufactured. In this paper, a transient numerical model for processing a three-phase symmetrical short circuit in a 30-kW HTS generator is proposed. It is based on an electromagnetic and thermal model, coupling the multiphysics of the rotating machinery and magnetic, circuit, and heat transfer modules. Some macroscopic characteristics of the generator, such as the output voltage and current waveforms, can be obtained. It also simulates the microscopic current shunting phenomenon between layers and temperature variation across HTS armature coils during a three-phase symmetrical short circuit fault. Then, some parameters of HTS conductors that are relevant to the temperature rise in coils are considered in this model. This simulation is an effective tool for analysing the transient performance of HTS generators in various fault operating conditions and could correspondingly provide an important guidance for the HTS machines’ preliminary design stage.

随着高温超导（HTS）材料的研究和生产技术变得越来越成熟，已经成功制造了许多由HTS导体制成的高效，轻便的电机。本文提出了一种瞬态数值模型，用于处理30 kW HTS发电机中的三相对称短路。它基于电磁和热模型，将旋转机械的多物理场与磁，电路和热传递模块耦合在一起。可以获得发电机的一些宏观特性，例如输出电压和电流波形。它还模拟了三相对称短路故障期间各层之间的微观电流分流现象以及HTS电枢线圈上的温度变化。然后，该模型考虑了高温超导体的一些与线圈温升有关的参数。该仿真是分析高温超导发电机在各种故障工况下的暂态性能的有效工具，并可以相应地为高温超导电机的初步设计阶段提供重要指导。