OPTIMIZED STRATEGY OF DUAL ACTIVE BRIDGE REFLUX POWER BASED ON EXTENDED PHASE SHIFT MODULATION

Li Yanjun; Zhang Xing; Zhao Wenguang; Qian Nixin; Wang Fusheng

doi:10.19912/j.0254-0096.tynxb.2020-0546

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (3) : 216-222. DOI: 10.19912/j.0254-0096.tynxb.2020-0546

OPTIMIZED STRATEGY OF DUAL ACTIVE BRIDGE REFLUX POWER BASED ON EXTENDED PHASE SHIFT MODULATION

Li Yanjun^1,2, Zhang Xing^1,2, Zhao Wenguang^1,2, Qian Nixin^1,2, Wang Fusheng^1,2

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Abstract

In the field of photovoltaic DC convergence and consumption, for the problem of reduced efficiency of dual active bridge DC-DC converters due to reflux power, on the basis of extended phase-shift modulation, an optimized modulation strategy for reflux power based on phase-shift coordinate transformation is proposed. The proposed strategy simplifies the mathematical model of the transmission power in different modes, and gives a segmented optimized trajectory of the reflux power to ensure the monotonicity of the transmission power compared with the shift after coordinate transformation. The optimal shift-combination combination can realize the optimal reflux power at any voltage conversion ratio without the load-side current sensor. Simulation and experimental results verify the effectiveness of the proposed scheme.

Key words

PV / dual active bridge / extended phase shift / reflux power / phase shift / coordinate transformation

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Li Yanjun, Zhang Xing, Zhao Wenguang, Qian Nixin, Wang Fusheng. OPTIMIZED STRATEGY OF DUAL ACTIVE BRIDGE REFLUX POWER BASED ON EXTENDED PHASE SHIFT MODULATION[J]. Acta Energiae Solaris Sinica. 2022, 43(3): 216-222 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0546

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