YANG Jindong, LIU Hongwen, DANG Junpeng, et al. Current Sharing Control Strategy for Parallel Converters Based on Junction Temperature Balancing[J]. 2025, 53(8): 95-104.
YANG Jindong, LIU Hongwen, DANG Junpeng, et al. Current Sharing Control Strategy for Parallel Converters Based on Junction Temperature Balancing[J]. 2025, 53(8): 95-104. DOI: 10.20204/j.sp.2025.08012.
Current Sharing Control Strategy for Parallel Converters Based on Junction Temperature Balancing
As the core components of parallel converters, power devices exhibit reduced reliability under uneven junction temperatures. To address this issue, this study proposes a current sharing control strategy based on junction temperature balancing. Firstly, a multi-objective optimization function is formulated with the output current of each converter as the independent variable, targeting the minimization of both junction temperature differences and system losses. Subsequently, intelligent optimization algorithms are employed to solve this function, deriving optimal current distribution schemes for each converter. Finally, the proactive balancing control of device junction temperatures is achieved via the dynamic adjustment of converter output currents. Simulation results confirm that the proposed strategy not only effectively reduces junction temperature variations among devices but also maintains stable control performance during dynamic changes in operating conditions.
YANG S,BRYANT A,MAWBY P,et al.An industry based survey of reliability in power electronic converters[J].IEEE Transactions on Industry Applications,2011,47(3):1441-1451.
YANG S Y,XIANG D W,BRYANT A,et al.Condition monitoring for device reliability in power electronic converters a review[J].IEEE Transactions on Power Electronics,2010,25(11):2734-2752.
WEI L X,MCGUIRE J,LUKASZEWSKI R A.Analysis of PWM frequency control to improve the lifetime of PWM inverter[J].IEEE Transactions on Industry Applications,2011,47(2):922-929.
FALCK J,ANDRESEN M,LISERRE M.Active thermal control of IGBT power electronic converters[C]// The 41st Annual Conference of the IEEE Industrial Electronics Society(IECON),Yokohama,Japan,2015:1-6.
LI R,XU D G.Parallel operation of full power converters in permanent-magnet direct-drive wind power generation system[J].IEEE Transactions on Industrial Electronics,2013,60(4):1619-1629.