Cascade Multi-level Converter Based DVR and D-STATCOM for Voltage Sag and Swell Reduction

This paper presents the modeling and simulation of
three and seven-level cascade multilevel converter (CMC) based
dynamic voltage restorer (DVR) and distribution static
compensator (D-STATCOM), aimed at correcting the supply
voltage sag/swell and interruption in low voltage distribution
networks. The proposed design models of CMC based DVR and
D-STATCOM are expected to be most powerful solutions to
minimize supply voltage disturbances of the sensitive loads. The
proposed models of DVR and D-STATCOM together with the
controllers are simulated by using electromagnetic transient
simulation program (PSCAD/ EMTDC) and the results are
presented to assess the performance of each device.