不需要任何辅助开关或无源谐振网络，变换器就可在双向变换工作中实现零电压开关。
Without the need of any auxiliary switches or complex passive resonant network, the converter can achieve ZVS in both forward and backward modes.
分析表明，即使系统不存在零序回路，DVR都会在补偿控制中向系统注入微小的零序分量，该零序分量会对无零序回路系统侧电压造成不良影响。
It shows that DVR will inject small zero sequence component into the power system during compensation control even if there is no zero sequence circuit. This will influence the voltage on system side.
用此一性质可将偏置电压调制为零省去偏置系统，利于系统集成，为实现无偏压双稳系统指明了方向。
Thus, the bias voltage could be modulated to be 0. This saved the bias setup is benefited to system integration and pointed out way of realizing biasless bistable device.
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