HYBRID CONTROL STRATEGY OF ISOP-DAB CONVERTER BASED ON SUPER TWISTING SLIDING MODE

Tao Haijun; Zhao Meng&#x02019;en; Zheng Zheng; Song Jiayao; Zhang Chenjie; Huang Tao

doi:10.19912/j.0254-0096.tynxb.2024-0315

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 127-134. DOI: 10.19912/j.0254-0096.tynxb.2024-0315

Special Topics of Academic Papers at the 39th Annual Meeting of the China Association for Science and Technology

HYBRID CONTROL STRATEGY OF ISOP-DAB CONVERTER BASED ON SUPER TWISTING SLIDING MODE

Tao Haijun^1,2, Zhao Meng’en¹, Zheng Zheng^1,2, Song Jiayao¹, Zhang Chenjie¹, Huang Tao³

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Abstract

In DC microgrid, aiming at the problems of power imbalance, poor dynamic performance and high backflow power of ISOP-DAB converter, in this paper, the double-loop decoupling strategy is combined with the super twisting sliding mode under extended phase-shift modulation. PI control is used in voltage balancing ring and super twisting sliding mode control is used in output voltage ring. Under extended phase shift modulation, two transmission power models and soft switching characteristics of single-module DAB converter are analyzed, establish the reduced order model of the converter. KKT condition method is applied to solve the optimal internal shift ratio D₁_i of each module, and the super twisting sliding mode controller is designed by the reduced order model and the super twisting algorithm, and the external shift ratio D₂_i is generated by the interaction with the pressure balancing ring to achieve power balance and improve dynamic performance. Finally, a two-module ISOP-DAB experimental platform is built for experimental verification. The experimental results show that the ISOP-DAB system can improve the dynamic performance of the converter while ensuring the input voltage balancing of each submodule, and effectively reduce the backflow power generated by the converter.

Key words

DC microgrid / super-twisting sliding mode control / dynamic performance / ISOP-DAB converter / backflow power optimization

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Tao Haijun, Zhao Meng’en, Zheng Zheng, Song Jiayao, Zhang Chenjie, Huang Tao. HYBRID CONTROL STRATEGY OF ISOP-DAB CONVERTER BASED ON SUPER TWISTING SLIDING MODE[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 127-134 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0315

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