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针对传统Z源风力发电变流系统机侧定子电流畸变严重,Z源网络电感电流纹波大的缺点,该文提出一种半准Z源逆变器(half quasi-Z-source inverter,H-qZSI),并将其应用于直驱永磁风力发电系统.阐述H-qZSI电感电流连续时的工作原理,得出升压因子与直通占空比的关系.当H-qZSI处于直通状态时,加在各输入电感上的电流仅由相电压瞬时值决定,改善机侧电流与机侧电压的非线性关系,从而降低发电机定子电流谐波.通过分析准Z源逆变器和H-qZSI输入电感电流纹波的产生机理,得出相同系统参数下,与准Z源逆变器相比,H-qZSI的输入电感电流纹波有效减小.最后通过仿真与实验验证理论分析的正确性.“,”This paper proposed a novel half quasi-Z-source inverter (H-qZSI) for grid-connected wind power generation systems,which can reduce the generator stator current harmonics and the input inductor current ripple in a great deal.The operation principle of H-qZSI was discussed in detail,when the input inductor operates in the continuous conduction mode (CCM).When H-qZSI operates in the shoot-through zero state,the derivative of generator stator currents is only determined by the instantaneous value of generator stator voltages,so the nonlinear relationship between generator stator currents and stator voltages is improved comparing with the traditional impedance-source inverter.The input inductor current ripple can be calculated according to the maximum and the minimum values of inductor currents in each switching transit moment.It was indicated that input inductor current ripple can be reduced effectively by means of the proposed H-qZSI.Finally,simulation and experimental results were given to verify the theoretical analysis.