【摘要】 作为PET的中间环节,双向DC-DC变换器起到电气隔离和电能变换的重要作用。文章阐述了PET发展状况,重点分析了双有源桥(DAB)变换器和LLC谐振变换器的工作原理与性能优化方法,介绍了PET采用这两种DC-DC变换器时的功率平衡控制策略,并探讨了PET未来发展的关键技术问题。更多还原

【Abstract】 As an intermediate link of power electronic transformer(PET), bidirectional DC-DC converter plays an important role in electrical isolation and electrical conversion. In this paper, the development of PET in recent years was illustrated. Dual active bridge(DAB) converter and LLC resonant converter are two typical isolation DC-DC converter in PET. Control strategy and performance optimization methods of the two converters were introduced respectively and so did the power balance control algorithm of PET based on the two converters. The key technology issues for future PET development were also discussed.更多还原