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Visions of future power systems contain high penetrations of inverters which are used to convert power from dc (direct current) to ac (alternating current) or vice versa. The behavior of these devices is dependent upon the choice and implementation of the control algorithms. In particular, there is a tradeoff between dc bus ripple and ac power quality. This study examines the tradeoffs. Four control...
Voltage sags, transients, and momentary interruption of power together constitute 90% of the power quality problems encountered by typical industrial customers. The series connected dynamic voltage restorer (DVR) are the right devices for these problems with statistically significant protection at greatly reduced cost. A transformer-less and DSP-based DVR proposed in the paper is studied and injects...
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