TY - JOUR A2 - Na, Jing AU - Zhang, Yang AU - Cheng, Zhun AU - Chen, Qing AU - Li, Qingmei PY - 2021 DA - 2021/07/02 TI - An Enhanced Half-Quasi-Z-Source Inverter for Wind Energy Conversion System with D-PMSG SP - 9962115 VL - 2021 AB - 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. SN - 1076-2787 UR - https://doi.org/10.1155/2021/9962115 DO - 10.1155/2021/9962115 JF - Complexity PB - Hindawi KW - ER -