Hybrid 3P4W DSTATCOM for three phase four wire distribution system

摘要

For the improvement power quality in the three phase four wire distribution system; a star-delta transformer based dynamic static compensator (DSTATCOM) has been proposed. The proposed hybrid three phase four DSTATCOM (3P4W DSTATCOM) is comprising of AC power capacitor; three phase three wire dynamic static compensator (3P3W DSTATCOM); a star-delta transformer and a single phase neutral line compensator. A control scheme based on least mean square algorithm is used for reference current estimation. The star-delta transformer and single phase neutral line compensator are used to mitigate the neutral current. This hybrid approach reduces the rating of the semi-conductor switches of 3P4W DSTATCOM and improves the performance under different utility voltage conditions. To study performance of the proposed system extensive MATLAB/Simulink computer simulation is carried out.