Z-source Inverter based DVR for Power Quality Improvement
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2014, Vol 3, Issue 10
Abstract
Interest in Power Quality has been explicitly seen in Electrical Power Engineering since past decade, even though utilities all over the world have for decades worked on the improvement of voltage quality, what is now known as power quality. Typical power problems include voltage sag, harmonics, notching, transients like surge, swell, etc. Control of power quality problems involves cooperation between network operator (utility), customer and equipment manufacturer. A Dynamic Voltage Restorer (DVR) is a distribution voltage DCto-AC solid-state switching converter that injects three single phase AC output voltages in series with the distribution feeder and in synchronism with the voltages of the distribution system. A DVR is interface equipment between utility and customer connected in series between the supply and load to mitigate the three major power quality problems, namely, the voltage sags, swells, and interruptions. The equations are formulated for calculating the voltages and power injected (inverter rating) from each of the three DVR phases (3-phase DVR). The modeling of Z-source based dynamic voltage restorer is carried out component wise and their performances are analyzed using MATLAB software.
Authors and Affiliations
Goruganti Sravanidevi, S. Siva Prasad
Keywords
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