【摘要】 三相并网逆变器采用LCL滤波器,具有更优的高频谐波衰减性,滤波效果更佳,但需考虑谐振抑制问题。针对LCL型并网逆变器的稳定控制展开研究,建立LCL型并网逆变器数学模型,分析了LCL滤波器高频谐振产生的机理和危害,详细介绍了LCL型并网逆变器电流控制、直接功率控制和模拟同步电机控制等方法的原理和应用,展望了LCL型并网逆变器控制的研究热点和研究方向。更多还原

【Abstract】 The three-phase grid-inverter with LCL filters has superior attenuation for the high frequency and better filter performance. The control stability of the LCL-type grid-connected inverter was studied, the LCL-type photovoltaic inverter mathematical model was established, and the LCL output filter resonance generation mechanism and hazards were analyzed. The control principles and methods of LCL-type photovoltaic inverter on the current dual closed-loop control, direct power control and mimic synchronous generator control was described. At last, the prospects of the LCL-type grid-connected inverter control research focus and research directions were discussed, and the advantages and disadvantages of several control strategies were summarized.更多还原