Abstract: Disclosed herein is a method for controlling an electrical converter system that includes: determining a nominal pulse pattern (tp,i*, ?up,i*) and a reference trajectory (x*) of at least one electrical quantity of the electrical converter system over a horizon of future sampling instants, the nominal pulse pattern (tp,i*, ?up,i*) comprises switching transitions (?up,i*) between output voltages of an electrical converter of the electrical converter system and the reference trajectory (x*) indicates a desired future development of an electrical quantity of the converter system; determining a small-signal pulse pattern (?abc(t, ?p,i)) by minimizing a cost function; determining a modified pulse pattern (topt,p,i, ?up,i) by moving the switching transitions of the nominal pulse pattern (tp,i*, ?up,i*) to generate modified switching transitions; and applying at least the next switching transition of the modified pulse pattern (topt,p,i, ?up,i) to the electrical converter system.

Abstract: Described herein is method for controlling an electrical converter, the electrical converter converting an input voltage (vin) into a multi-level output voltage (vout), the method incudes: determining an optimized pule pattern (u(x)); and determining switching states from the optimized pulse pattern (u(x)) and applying the switching states to semiconductor switches of the electrical converter, such that the multi-level output voltage (vout) is generated, where the optimized pulse pattern (u(x)) includes a plurality of switching transitions (?u), each switching transition (?ui) encoding a transition between two different levels of the multi-level output voltage (vout), at a switching angle (xi), where the optimized pulse pattern (u(x)) is determined by optimizing a cost function, where the cost function J(x)=?uTA(x)?u is a cost matrix A(x), and where each entry of the cost matrix A(x) depends on polynomials into which the switching angles (xi) are input.

Abstract: Disclosed herein is a method for controlling an electrical converter system that includes: determining a nominal pulse pattern (tp,i*, ?up,i*) and a reference trajectory (x*) of at least one electrical quantity of the electrical converter system over a horizon of future sampling instants, the nominal pulse pattern (tp,i*, ?up,i*) comprises switching transitions (?up,i*) between output voltages of an electrical converter of the electrical converter system and the reference trajectory (x*) indicates a desired future development of an electrical quantity of the converter system; determining a small-signal pulse pattern (?abc(t, ?p,i)) by minimizing a cost function; determining a modified pulse pattern (topt,p,i, ?up,i) by moving the switching transitions of the nominal pulse pattern (tp,i*, ?up,i*) to generate modified switching transitions; and applying at least the next switching transition of the modified pulse pattern (topt,p,i, ?up,i) to the electrical converter system.