CURRENT BALANCE CONTROL FOR NON INTERLEAVED PARALLEL BRIDGE CIRCUITS IN POWER CONVERTER

摘要

Systems and methods for reducing current imbalance between parallel bridge circuits used in a power converter of a power generation system� such as a wind driven doubly fed induction generator (DFIG) system� are provided. The power converter can include a plurality of bridge circuits coupled in parallel to increase the output power capability of the system. Each of the bridge circuits can include a pair of switching elements� such as insulated gate bipolar transistors (IGBTs)� coupled in series with one another. The switching elements of the parallel bridge circuits can be controlled� for instance� using control commands (e.g. pulse width modulation commands) according to a substantially non interleaved switching pattern. The timing of the control commands according to the substantially non� interleaved switching pattern can be adjusted to reduce current imbalance between the parallel bridge circuits.