Hybrid capacitor bank for a power conversion assembly

A wind turbine power system, comprising:

• a rotor comprising a rotatable hub having at least one rotor blade mounted thereto;
• a generator coupled to the rotor;
• a power conversion assembly comprising a line side converter, a rotor side converter, and a direct current (DC) filter circuit bridging the line side converter and the rotor side converter, the line side converter comprising a plurality of switching devices, the DC filter circuit comprising a DC link comprising a positive rail, a negative rail, and a capacitor bank bridging the line side converter and a rotor side converter, the capacitor bank configured for maintaining a voltage of the DC link within a certain range, the capacitor bank comprising a plurality of capacitors coupled to the positive rail and the negative rail, the plurality of capacitors comprising, at least, a first set of capacitors being a first type of capacitors connected in parallel with a second set of capacitors being a different, second type of capacitors,
• wherein each capacitor in the first set of capacitors is positioned closer to a respective switching device of the plurality of switching devices than a corresponding capacitor of the second set of capacitors to minimize impedance between each capacitor in the first set of capacitors and the respective switching device such that a majority of ripple current from the plurality of switching devices passes through the first set of capacitors.