首页|A structural optimized method and verification of fusion converter for high current sharing performance
A structural optimized method and verification of fusion converter for high current sharing performance
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NETL
NSTL
Elsevier
Current unbalance caused by impedance disparities among multiple parallel branches can lead to accelerated aging of some power devices and localized overheating, posing a threat to the normal operation of fusion power supplies. A method for improving the current sharing performance of fusion converters with paralleled branches based on structural parameter optimization is proposed in this paper. Firstly, a high-precision converter bridge arm structure is constructed using ANSYS Q3D, and sub-circuits of segmented modules are extracted; subsequently, a circuit model is built in Simplorer, and the current of each branch is obtained through joint simulation with Simplorer; then, with branch current as the matching parameter, an adaptive target optimization algorithm is utilized to iterate and optimize structural parameters, thereby acquiring a set of bridge arm structures with optimal current sharing performance; finally, fine-tuning is conducted considering the actual spatial limitation. To validate the superiority of the proposed method, the current sharing effects of the structures before and after optimization under both steady-state and short-circuit conditions are analyzed and compared. The results indicate that the optimized structure has shown significant improvements in terms of current sharing coefficient, over-current ratio, and maximum turn-off error time. This method could be used for the current sharing design of fusion power supplies and related multiple parallel devices.
Fusion converterStructural optimizationParallel Current SharingANSYSSIC MOSFETS
NETL
NSTL
Elsevier
