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An Enhanced Half-Quasi-Z-Source Inverter for Wind Energy Conversion System with D-PMSG

Author

Listed:
  • Yang Zhang
  • Zhun Cheng
  • Qing Chen
  • Qingmei Li
  • Jing Na

Abstract

To solve the problem of the traditional quasi-Z-source inverters with low voltage gain, an enhanced half-quasi-Z-source inverter (E-HQZSI) is proposed and applied to direct-drive permanent-magnet wind power generation systems in this paper. The expression of the boosting factor is deduced, which shows that E-HQZSI has higher voltage gain compared with the QZSI and HQZSI. However, the higher voltage gain of the E-HQZSI will lead to the large distortion of the generator stator current necessarily. In this paper, a periodic shoot-through duty ratio control scheme is proposed to reduce the stator current harmonics for E-HQZSI. According to the change rule of the single-phase stator current, the shoot-through duty ratio is compromised to make that the three-phase stator currents are as close as possible to the sine wave. Finally, the correctness of the theoretical analysis is verified by simulation and experiment.

Suggested Citation

  • Yang Zhang & Zhun Cheng & Qing Chen & Qingmei Li & Jing Na, 2021. "An Enhanced Half-Quasi-Z-Source Inverter for Wind Energy Conversion System with D-PMSG," Complexity, Hindawi, vol. 2021, pages 1-15, July.
    • Handle: RePEc:hin:complx:9962115
    DOI: 10.1155/2021/9962115
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