1.China Electric Power Research Institute Beijing 100192 China; 2.School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China; 3.University of Bath Bath BA2 7AY United Kingdom
Abstract：The high-temperature superconducting magnet energy storage (HTS-SMES) system can increase the operation temperature range to 20～77K which is dramatically beneficial to the cost of refrigeration.Energy storage magnet is considered as one of the most important components in HTS-SMES system and its electromagnetic optimization design is the fundamental issue in the design of a HTS-SMES magnet.The toroial configuration of SEMS is applied in this paper due to its great energy density and low stray field.And the REBCO coated conductor is used to wind the toroidal HTS-SMES magnet.Based on the magneto-circuit coupling analysis method,an electromagnetic optimization design method for a toroidal HTS-SMES magnet using Matlab and COMSOL is proposed.The distribution of magnetic induction intensity and the stray field of the toroidal HTS-SMES magnet in the operating condition are calculated.And the configuration of the toroidal HTS-SMES magnet is obtained to achieve the maximum storage energy with a given temperature and a fixed length for REBCO tapes.The results indicate that there is little difference in the storage energy in spite of the changes in the number of element coils.Besides,the storage energy increase at first,and then decrease with the increase in the number of element coils.The storage energy can be visibly increased after optimizing by the proposed method which have a great effect on seeking structure parameters of the toroidal HTS-SMES magnet to maximize the storage energy.
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2016, Vol. 31 
