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Compared with traditional reactors, superconducting reactors have the advantages of small volume, light weight, high efficiency and low harmonics, which are more conducive to improving the stability of the power system. During operation, transport AC loss may bring unexpected huge burdens to the cryogenic system, thus affecting its operational stability. Accurately evaluating the AC loss during operation is helpful for its safe design and stable operation. This paper constructs a multi-section separation simulation method to analyze the AC loss characteristics of a 1 Mvar toroidal superconducting reactor composed of racetrack-shaped double-pancake coils. Aiming at its three-dimensional asymmetric structure, this method transforms the three-dimensional model into several two-dimensional models, analyzes the AC loss at different positions, and greatly reduces the solution complexity. The calculation results of this method are compared and verified with other simulation results. This method will give practical engineering guidance to the preliminary evaluation of AC loss in asymmetric magnets, thereby improving the thermal stability of the designed superconducting magnets.
Index Terms: superconducting shunt reactor, toroidal structure, transport AC loss, the multi-section separation method
