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Analysis of Direct Cooling High Temperature SMES Device Leakage Magnetic Field Based on Finite Element Method

High temperature superconducting magnetic energy storage system (SMES) is a strong electromagnetic source with serious leakage magnetic field. Leakage magnetic field can cause certain effect to environment, which should be taken into consideration in the design process of high temperature SMES. Direct cooling high temperature SMES device was seen as research object. Two dimensional model of high temperature SMES device was built by using ANSYS, and the leakage magnetic field of SMES devices, whose cryostat are of different magnetic permeability, were compared. The security scope of SMES device was determined under operating condition. Research results can provide important guidelines for the design of the SMES device.