FULL-BRIDGE BUCK BOOST CONVERTER CELL FOR MMC

摘要

The present disclosure relates to a full-bridge converter cell (4).The cell comprises a buck-boost (BB) arrangement (4b) comprising a plurality of semiconductor switches(Sx, Sy). The cell also comprises a bi-polar arrangement (4a) arranged as an interface between the BB arrangement and terminals (A, B) of the cell. The bi-polar arrangement comprises a plurality of semiconductor switches. The BB arrangement is configured to operate such that when electrical power is flowing into the cell, power is moved from the terminals to a main energy storage (Cm), via an inductor (Lf), and when electrical power is flowing out of the cell, power is moved from the main energy storage to the terminals, via the inductor. The bi-polar arrangement is configured to enable the BB arrangement to operate regardless of the polarities of the cell terminals.