By digital adjustment with high precision on the DC bias of reference sine wave, the DC bias contained in inverter output voltage can be adjusted to restrain DC circulating current.
通过对逆变器基准正弦波直流分量的高精度数字调节，相应调节逆变器输出电压直流分量以抑制直流环流。
For a parallel inverter system without output isolating transformers, discrepancy in DC biases contained in the output voltage of each module can cause large DC circulating current among inverters.
对于无输出隔离变压器的逆变器并联系统，各模块输出电压直流分量不一致会在模块间产生较大的直流环流。
For a parallel inverter system without output isolating transformers, discrepancy in DC biases contained in the output voltage of each module can cause large DC circulating current among inverters.
对于无输出隔离变压器的逆变器并联系统，各模块输出电压直流分量不一致会在模块间产生较大的直流环流。
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