Comparison of Power Quality Improvement by D-STATCOM and Distributed Generation in Distribution System
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 12
Abstract
In t his paper proposes operation and control of converter b a s e d single phase distributed generators (DG) in a utility connected grid. A common utility practice is to distribute the household single-phase loads evenly between the three phases. The voltage unbalance between the phases remains within a reasonable limit. However the voltage unbalance can be severe if single-phase rooftop mounted PVs are distributed randomly between the households. Moreover, there can also be single phase non-linear loads present in the system. The cumulative effect of all these will cause power quality problems at utility side. The problem can be macabre if three-phase active loads (e.g., induction motors) are connected to utility feeder. To counteract this problem, first scheme a distribution static compensator (DSTATCOM) is connected at the utility bus to improve the power quality. The DSTATCOM only supplies reactive power and no real power. In the second scheme, a larger three-phase converter controlled DG is placed that not only supplies the reactive power but also provides active power. The efficacies of the controllers have been validated through simulation for various operating conditions using MATLAB.
Authors and Affiliations
G. Saritha, Dr. Chandrashekhar Reddy. S,
Keywords
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