Abstract
Custom power devices (CPDs) have been developed to solve the power quality problems of the distribution systems. Among these CPDs, distribution static synchronous compensator (D-STATCOM) attained a great interest to the researchers and practising engineers. In this paper, the performance of a reduced rating D-STATCOM has been thoroughly investigated for power quality improvement in three-phase, four-wire distribution systems. The complete arrangement considered in this work comprises of a three-phase, three-wire (3P3W) D-STATCOM, zigzag-delta transformer and a single-phase active power filter (APF). This hybrid approach significantly reduces the rating of the overall compensator and improves the performance under non-ideal utility voltage conditions. To show the efficacy of the compensator, extensive simulation studies have been carried out for both normal an unbalanced/distorted utility voltage conditions in MATLAB/SIMULINK® environment using power system blockset toolboxes. Moreover, experimental results obtained from the laboratory system further verify the viability and effectiveness of the compensator.
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