The hybrid power router consists of line-frequency transformers and converters. Due to the coupling effect between transformers and converters, the core saturation of the transformer and overcurrent of converters may happen during the startup process, which could threaten the safe operation of a hybrid power router. Thus, this paper proposes a soft start control strategy for the hybrid power router to suppress overcurrent. Firstly, the topology of the hybrid power router is presented. Secondly, the overcurrent mechanism of the hybrid power router during the startup process is analyzed. Then, a novel soft start control strategy based on linear flux control is proposed to eliminate the overcurrent of transformers and converters. Besides, the virtual synchronous generator control is applied to the converter, avoiding control strategies switching operations during the startup process. Finally, the feasibility of the proposed control strategy is verified through simulation.

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Soft Start Control Strategy of Hybrid Power Router for Overcurrent Suppression

  • Fei Wang,
  • Zhenlan Dou,
  • Jinmu Lai,
  • Zijian Wu,
  • Jiaxuan Hu

摘要

The hybrid power router consists of line-frequency transformers and converters. Due to the coupling effect between transformers and converters, the core saturation of the transformer and overcurrent of converters may happen during the startup process, which could threaten the safe operation of a hybrid power router. Thus, this paper proposes a soft start control strategy for the hybrid power router to suppress overcurrent. Firstly, the topology of the hybrid power router is presented. Secondly, the overcurrent mechanism of the hybrid power router during the startup process is analyzed. Then, a novel soft start control strategy based on linear flux control is proposed to eliminate the overcurrent of transformers and converters. Besides, the virtual synchronous generator control is applied to the converter, avoiding control strategies switching operations during the startup process. Finally, the feasibility of the proposed control strategy is verified through simulation.