公开(公告)号：US11967908B2

公开(公告)日：2024-04-23

申请号：US17764793

申请日：2020-09-29

Applicant: ABB Schweiz AG

Inventor： Martinus David Dorfling ,  Hendrik Du Toit Mouton ,  Tobias Geyer

IPC: H02M7/5387 ,  H02P27/12 ,  H02P27/14

CPC classification number: H02M7/53876 ,  H02P27/12 ,  H02P27/14

Abstract: Disclosed herein is a method for controlling an electrical converter system that includes: determining a nominal pulse pattern (tp,i*, Δup,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*, Δup,i*) comprises switching transitions (Δup,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 (ũabc(t, λp,i)) by minimizing a cost function; determining a modified pulse pattern (topt,p,i, Δup,i) by moving the switching transitions of the nominal pulse pattern (tp,i*, Δup,i*) to generate modified switching transitions; and applying at least the next switching transition of the modified pulse pattern (topt,p,i, Δup,i) to the electrical converter system.

公开(公告)号：US20230155481A1

公开(公告)日：2023-05-18

申请号：US17908159

申请日：2021-01-28

Applicant: ABB Schweiz AG

Inventor： Tobias Geyer ,  Hendrik Du Toit Mouton

IPC: H02M1/12 ,  H02M7/483

CPC classification number: H02M1/12 ,  H02M7/483

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 (Δu), each switching transition (Δui) 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)=ΔuTA(x)Δu 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.