T-connected transformer integrated three-leg VSC based 3P4W DSTATCOM for power quality improvement

This paper provides power factor correction, harmonics elimination, load balancing and neutral current compensation of linear and non-linear, balanced and unbalanced loads using custom power device DSTATCOM for three-phase four-wire (3P4W) system. Perfect Harmonic cancellation (PHC) theory has been used for reference current generation. A three-leg voltage source converter topology with T-connected transformer as distribution static compensator (DSTATCOM) is used in this paper. T-connected transformer is introduced here for neutral current compensation. Capability of this arrangement is demonstrated using results obtained from MATLAB-Simulink based environment.