理论分析和实验表明，基于双闭环重复控制的并网逆变器具有较高的输出电能质量和较低的并网电流谐波畸变率。
Theoretical analysis and experimental results verify that the dual closed loop repetitive control based inverter has high output energy quality and low THD of grid-connected current.
从开关利用率的角度，为不同负载电流畸变率情况下选取何种电路进行谐波补偿，提供了理论依据。
From the view of switch utilization ratio, the theory gist is given for employing which circuit in condition with different total harmonic distortion of load current to correct harmonic current.
通过优化参数设置，可以使弧焊逆变电源的功率因数提高到95%，电流谐波畸变率低到30%。
Through the parameters optimization, the power factor (PF) can be increased to95%and Total Harmonics Distortion (THD) can be decreased to below30%.
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