دانلود رایگان مقاله انگلیسی بهینه سازی عملکرد دینامیکی و استاتیکی مبدل های DC-DC برآمدگی فعال دوگانه - اشپرینگر 2018

Abstract

High efficiency and fast dynamic response are two main control objectives for dual active bridge (DAB) DC-DC converters. Traditional extended phase shift (EPS) control can significantly enhance the conversion efficiency of DAB DC-DC converters by reducing current stress; however, it cannot fulfill fast dynamic response requirements. In this paper, a novel hybrid control scheme consisting of EPS control and direct power control (DPC), named as EPS-DPC, is proposed. EPS-DPC control has salient features in both efficiency and dynamic performance. In order to verify the outstanding performance of the proposed EPS-DPC scheme, an experimental comparison was carried out on a scale-down DAB DC-DC converter among several control strategies, including single phase shift control with traditional voltage-loop (SPSTVL), EPS control with traditional voltage-loop (EPSVTL), and EPS-DPC. Experimental results have been high consistent with theoretical analysis, and verified these advantages of the proposed EPS-DPC scheme.

6 Conclusion

In order to improve both efficiency and the output dynamic response of DAB DC-DC converters, a hybrid control scheme combining the extend-phase-shift control and direct power control is proposed in this paper. For DAB DC-DC converter applications, the proposed EPSDPC, the EPS-TVL and the SPS-TVL schemes are analyzed and compared in detail. A scale-down experimental prototype test is utilized to compare performances of these three control schemes and verify benefits of the proposed EPS-DPC. The conducted studies conclude that the proposed EPS-DPC scheme has following salient features:

1) EPS-DPC scheme can achieve the best dynamic performance under start-up process, input voltage fluctuation, and load disturbance circumstances when compared with SPS-TVL and EPS-TVL.

2) EPS-DPC, as well as EPS-TVL, can realize higher converter efficiency than SPS-TVL, especially in relatively high input voltage conditions.