Comparison of Star/Delta and Zig/Zag transformer based DSTATCOM for power quality improvement

Now a day's power quality improvement is an important issue in respect of increasing application for nonlinear loads. The DSTATCOM is design for improvement, performance of distribution system under linear and nonlinear loads. Especially in nonlinear load DSTATCOM inject harmonics current components into the system to improve power quality of source current and source voltage. Further in the proposed systems the rating and size of DSTATCOM is reduced with the help of Star/Delta and Zig/Zag transformer. The proposed systems is employed for the reduce rating of dc current, compensation of harmonic current, reactive power, neutral current, load balancing and the voltage regulation. In this paper comparison of proposed topology of DSTATCOM consisting of a three leg VSC with the Star/Delta and Zig/Zag transformer is employed. The performance of proposed DSTATCOM system is demonstrated under nonlinear loads in MATLAB/Simulink.