DC Microgrid Reliability Enhancement with Adaptive Converter Thermal Management

Due to the different device selections, aging levels, and thermal dissipation performance, some converters may take additional thermal stress on switching devices than others in paralleled converter systems, which will reduce system reliability. To address this problem, this paper proposes a power-s...

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Bibliographic Details
Main Authors: Zhu, Xiangchen, Huang, Pengxiang, Wang, Yanbo, Zhang, Hanwen, Wei, Ruizhi, Li, Yunwei Ryan, Chen, Zhe
Format: Conference Proceeding
Language:English
Subjects:
Adaptation models
DC microgrid
Junctions
Microgrids
Real-time systems
Reliability
Switches
switching device
Systems operation
Temperature control
Thermal management
Thermal stresses
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Summary:Due to the different device selections, aging levels, and thermal dissipation performance, some converters may take additional thermal stress on switching devices than others in paralleled converter systems, which will reduce system reliability. To address this problem, this paper proposes a power-sharing strategy with adaptive thermal management. First, the temperature-based power loss model and electrical-thermal model are established. Based on that, a high-accuracy IGBT junction temperature estimate considering the power loss-temperature coupling can be achieved. Further, the thermal-sharing for all the switching devices in paralleled converters can be achieved with the proposed adaptive thermal management strategy. The proposed strategy can change the power-sharing ratio adaptively according to the system operation conditions, which will contribute to the system reliability enhancement. The effectiveness of the proposed strategy is verified through PLECS thermal simulation and joint real-time simulation with Dspace and RT-box.
ISSN:2572-6013
DOI:10.1109/ICRERA62673.2024.10815453