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<p>As an emerging power electronics topology, the quasi-single-stage four port three-phase converter (QSS-FPTPC) has two DC voltage ports and two three-phase AC voltage ports. Due to the function of its internal DC-DC converter, the voltage at its low-voltage DC port can vary over a wide range. This paper introduces the topology structure of the QSS-FPTPC and analyzes the effective working states corresponding to the two sets of outputs of the four-port three-phase DC-AC converter. To achieve the transmission of as much power as possible through the low-voltage port and reduce the number of power conversion stages, an improved SVPWM strategy is proposed. Based on the improved SVPWM strategy, an output-integrated improved SVPWM strategy is proposed, which can flexibly adjust the voltage transmission ratio of the two groups of outputs to meet different voltage requirements and achieve a wide range voltage output. Finally, the effectiveness of the proposed modulation strategy is verified through experiments.</p>

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Output-integrated improved SVPWM strategy for wide voltage range in quasi-single-stage four-port three-phase DC-AC converters

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Chaochao Li,
  • Hongchen Liu,
  • Rutian Wang,
  • Zhanfeng Xiong

摘要

As an emerging power electronics topology, the quasi-single-stage four port three-phase converter (QSS-FPTPC) has two DC voltage ports and two three-phase AC voltage ports. Due to the function of its internal DC-DC converter, the voltage at its low-voltage DC port can vary over a wide range. This paper introduces the topology structure of the QSS-FPTPC and analyzes the effective working states corresponding to the two sets of outputs of the four-port three-phase DC-AC converter. To achieve the transmission of as much power as possible through the low-voltage port and reduce the number of power conversion stages, an improved SVPWM strategy is proposed. Based on the improved SVPWM strategy, an output-integrated improved SVPWM strategy is proposed, which can flexibly adjust the voltage transmission ratio of the two groups of outputs to meet different voltage requirements and achieve a wide range voltage output. Finally, the effectiveness of the proposed modulation strategy is verified through experiments.