Abstract
This paper presents a single-phase dynamic voltage restorer (DVR) equipped with a high-frequency isolated soft-switching converter. The proposed DVR can maintain the load voltage stable and lower the harmonic distortion. Moreover, by using simple resonant units, all main switches are operated at zero-voltage-switching (ZVS) turn-on mode. Simultaneously, other auxiliary switches are operated at zero-current-switching (ZCS) turn-off mode. The advantages of this topology are reducing the switching losses and lowering the electromagnetic interference (EMI). On the other hand, by using a high-frequency isolated soft-switching converter instead of using a low-frequency isolation transformer can significantly reduce the weight and volume of the proposed DVR. And, the power density of the proposed device can be enhanced greatly. Finally, some results of the simulation are provided to verify the performance of the proposed DVR.
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