Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Single-Phase Quasi Z-Source Dynamic Voltage Restorer(DVR)
Authors 李Ki-Taeg Lee ; Young-Gook Jung ; Young-Cheol Lim
DOI 10.6113/TKPE/2010.15.4.327
Page pp.327-334
ISSN 1229-2214
Keywords Instantaneous voltage sag-swell compensation; Dynamic voltage restorer(DVR); Quasi Z-source PWM ac-ac converter; Peak voltage detection method
Abstract This paper deals with a single-phase dynamic voltage restorer(DVR) with a quasi Z-source topology. The proposed system based on a single-phase quasi Z-source PWM ac-ac converter which have features such as the input voltage and output voltage are sharing ground, and input current operates in continuous current mode(CCM). For the detection of voltage sag-swell, peak voltage detection method is applied. Also, the circuit principles of the proposed system are described. During the 60% severe voltage sag and 30% voltage swell, the proposed system controls the adding or missing voltage and maintains the rated voltage of sinusoidal waveform at the terminals of the critical loads. Finally, PSIM simulation and experimental results are presented to verify the proposed concept and theoretical analysis.