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Asymmetrical SPWM-based control scheme for BESS-integrated UPQC with hybrid connected configuration

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Abstract

The unified power quality conditioner (UPQC) integrated with the battery energy storage system not only mitigates the power quality problems on the grid side and load side but also supplies active power to the load or the grid. The wide voltage variation of the battery and the high efficiency of the whole system can be achieved with the hybrid connected configuration, i.e., the battery is connected simultaneously to the series and shunt converters of the UPQC directly and indirectly through the dc–dc converter. However, the control and modulation strategies are the major challenges for this configuration. This study proposes a control scheme based on asymmetrical sinusoidal pulse width modulation (SPWM) to realize high-efficiency active power delivery, thereby addressing the issue above. The mechanism of the modulation scheme to regulate active power is revealed, and the voltage variation of the battery is considered. The modified SPWM strategy features easy implementation and a low computation burden. The effectiveness of the system with the proposed control and modulation schemes is verified by both simulation and experimental results.

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Authors and Affiliations

  1. State Grid Jibei Electric Power Company Limited Smart Distribution Network Center, Qinhuangdao, China

    Zhenqiang Zhang, Jianjun Zhao, Hongbo Wang, Nan Wang & Peng Zhang

  2. State Grid Jibei Electric Power Company Limited, Beijing, China

    Shen Liu & Peng Xu

  3. State Grid Qinhuangdao Electric Power Supply Company, Qinhuangdao, China

    Yue Yu

Authors
  1. Zhenqiang Zhang
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  2. Jianjun Zhao
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  3. Shen Liu
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  4. Hongbo Wang
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  5. Nan Wang
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  6. Peng Zhang
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  7. Yue Yu
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  8. Peng Xu
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Correspondence to Peng Xu.

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Zhang, Z., Zhao, J., Liu, S. et al. Asymmetrical SPWM-based control scheme for BESS-integrated UPQC with hybrid connected configuration. J. Power Electron. 22, 1735–1745 (2022). https://doi.org/10.1007/s43236-022-00483-1

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  • DOI: https://doi.org/10.1007/s43236-022-00483-1

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