公开(公告)号：WO2021069259A1

公开(公告)日：2021-04-15

申请号：PCT/EP2020/077246

申请日：2020-09-29

Applicant: ABB SCHWEIZ AG

Inventor： DORFLING, Martinus David ,  DU TOIT MOUTON, Hendrik ,  GEYER, Tobias

IPC: H02M7/48 ,  H02M7/5387 ,  H02M1/12 ,  G05B13/04 ,  H02P23/00 ,  H02M1/00 ,  H02P21/00 ,  H02P27/12 ,  H02P27/14

Abstract: A method for controlling an electrical converter system (10) comprises: determining a nominal pulse pattern (t*p,i, Δu*p,i) and a reference trajectory (x*) of at least one electrical quantity of the electrical converter system (10) over a horizon of future sampling instants, wherein the nominal pulse pattern (t*p,i, Δu*p,i) and the reference trajectory (x*) are determined from a table of optimized pulse patterns, the nominal pulse pattern (t*p,i, Δu*p,i) comprises switching transitions (Δu*p,i)between output voltages of an electrical converter (12) of the electrical converter system (10) and the reference trajectory (x*) indicates a desired future development of an electrical quantity of the converter system (10); determining a small-signal pulse pattern (ũabc(t, λρ,i)) by minimizing a cost function, which cost function includes a small-signal error, which is based on a difference of a reference trajectory (x*) and a predicted trajectory (x), wherein the impulse strengths (λρ,i) of the small-signal pulse pattern (ũabc(t, λρ,i)) encode a voltage-time value at each switching transition of the nominal pulse pattern (t*p,i, Δu*p,i), and wherein the predicted trajectory (x) is determined over the horizon from measurements (i, vc, ig) in the converter system (10) and from a model of the converter system (10), into which a sum of the nominal pulse pattern (t*p,i, Δu*p,i) and small-signal pulse pattern (ũabc(t, λρ,i)) are input; determining a modified pulse pattern (t opt,p,i, Δup,i) by moving the switching transitions of the nominal pulse pattern (t*p,i, Δu*p,i), wherein a switching transition is moved by a time interval, such that the time interval times a direction of the switching transition equals the voltage-time value that the impulse strength (λ p,i) encodes at the nominal switching transition; and applying at least the next switching transition of the modified pulse pattern (t opt,p,i, Δup,i) to the electrical converter system (10).

公开(公告)号：EP4304075A1

公开(公告)日：2024-01-10

申请号：EP22182764.5

申请日：2022-07-04

Applicant: ABB SCHWEIZ AG

Inventor： DORFLING, Martinus David ,  KARACA, Orcun ,  GEYER, Tobias ,  TSOUMAS, Ioannis

IPC: H02M7/493 ,  H02M7/487 ,  H02M1/12 ,  H02M1/00

Abstract: A method for controlling an electrical converter system (10) with at least two electrical converters (28a, 28b) comprises: determining a pulse pattern (A 1 , U 1 ; A 2 , U 2 ) for each electrical converter (28a, 28b) from a reference converter voltage of the respective converter (28a, 28b), wherein each pulse pattern ( A 1 , U 1 ; A 2 , U 2 ) comprising switching times ( A 1 ; A 2 ) and switching transitions (U 1 ; U 2 ) for the respective electrical converter (28a, 28b); determining a sum current reference ( i sum ∗ ) and at least one difference current reference ( i diff ∗ ) produced by the pulse pattern (A 1 ,U 1 ;A 2 ,U 2 ) and determining a measured sum current ( i sum ) and at least one measured difference current ( i diff ) from measurements in the electrical converter system (10); determining a sum current error ( i sum,err ) and at least one difference current error ( i diff,err ), wherein the sum current error ( i sum,err ) is determined by subtracting the measured sum current ( i sum ) from the sum current reference ( i sum ∗ ), and a difference current error ( i diff,err ) is determined by subtracting the respective measured difference current ( i diff ) from the difference current reference ( i diff ∗ ); determining a sum flux modification (Δ ψ sum ) by multiplying a gain (L̃ t ) to the sum current error ( i sum,err ) and at least one difference flux modification (Δ ψ diff ) by multiplying a gain (L s ) to the respective difference current error ( i diff,err ); mapping the sum flux modification (Δ ψ sum ) and the at least one difference flux modification (Δ ψ diff ) to a converter flux modification (Δ ψ 1,abc , Δ ψ 2,abc ) for each electrical converter (28a, 28b); modifying the pulse pattern (A 1 , U 1 ; A 2 , U 2 ) for each electrical converter (28a, 28b) by moving the switching times, such that the converter flux modification (Δ ψ 1, abc , Δ ψ 2, abc ) is compensated by the modified pulse pattern ( u 1, abc , u 2 ,abc ) with the moved switching times; and applying the modified pulse patterns ( u 1 ,abc , u 2,abc ) to the electrical converters (28a, 28b).

公开(公告)号：EP4362311A1

公开(公告)日：2024-05-01

申请号：EP22204176.6

申请日：2022-10-27

Applicant: ABB SCHWEIZ AG

Inventor： DORFLING, Martinus David ,  GEYER, Tobias

IPC: H02M7/487

CPC classification number: H02M7/487

Abstract: A method for computing an optimized pulse pattern (20) for an electrical converter (18) is presented. The optimized pulse pattern (20) comprises a series of switching transitions, each switching transition comprising a switching angle (αi) and a switch position (ui). The switching angles (αi) are computed by minimizing a total demand distortion of a load current produced by the optimized pulse pattern (20), wherein an objective function is minimized, which models the total demand distortion of a load current in dependence of the switching angles (αi) and switch positions (ui). The total demand distortion of the load current is minimized subject to at least one additional constraint, which limits a turn-off current, and/or a switching loss, a temperature and/or a voltage to be blocked for a set of semiconductor devices (26) of the electrical converter (18).

公开(公告)号：EP3806311A1

公开(公告)日：2021-04-14

申请号：EP19202732.4

申请日：2019-10-11

Applicant: ABB Schweiz AG

Inventor： DORFLING, Martinus David ,  DU TOIT MOUTON, Hendrik ,  GEYER, Tobias

IPC: H02M7/48 ,  H02M7/5387 ,  H02M1/12 ,  G05B13/04 ,  H02P23/00 ,  H02M1/00

Abstract: A method for controlling an electrical converter system (10) comprises: determining a nominal pulse pattern t p , i * Δ u p , i * and a reference trajectory ( x *) of at least one electrical quantity of the electrical converter system (10) over a horizon of future sampling instants, wherein the nominal pulse pattern t p , i * Δ u p , i * and the reference trajectory ( x *) are determined from a table of optimized pulse patterns, the nominal pulse pattern t p , i * Δ u p , i * comprises switching transitions Δ u p , i * between output voltages of an electrical converter (12) of the electrical converter system (10) and the reference trajectory ( x *) indicates a desired future development of an electrical quantity of the converter system (10); determining a small-signal pulse pattern ( ũ abc ( t , λ p , i )) by minimizing a cost function, which cost function includes a small-signal error, which is based on a difference of a reference trajectory ( x *) and a predicted trajectory ( x ), wherein the impulse strengths ( λ p,i ) of the small-signal pulse pattern ( ũ abc ( t, λ p , i )) encode a voltage-time value at each switching transition of the nominal pulse pattern t p , i * Δ u p , i * , and wherein the predicted trajectory ( x ) is determined over the horizon from measurements ( i , v c , i g ) in the converter system (10) and from a model of the converter system (10), into which a sum of the nominal pulse pattern t p , i * Δ u p , i * and small-signal pulse pattern ( ũ abc (t, λ p , i )) are input; determining a modified pulse pattern ( t opt,p,i , Δ u p,i ) by moving the switching transitions of the nominal pulse pattern t p , i * Δ u p , i * , wherein a switching transition is moved by a time interval, such that the time interval times a direction of the switching transition equals the voltage-time value that the impulse strength ( λ p , i ) encodes at the nominal switching transition; and applying at least the next switching transition of the modified pulse pattern ( t opt,p,i , Δ u p,i ) to the electrical converter system (10).

公开(公告)号：EP4436027A1

公开(公告)日：2024-09-25

申请号：EP23163687.9

申请日：2023-03-23

Applicant: ABB SCHWEIZ AG

Inventor： ULMER, Daniel ,  KARACA, Orcun ,  DORFLING, Martinus David ,  HARNEFORS, Lennart ,  TSOUMAS, Ioannis

IPC: H02M5/458 ,  H02M1/12 ,  H02M7/493 ,  H02M7/5387

CPC classification number: H02M1/12 ,  H02M5/4585 ,  H02J2300/2820200101 ,  H02M7/53875 ,  H02M7/493 ,  H02J3/381

Abstract: An electrical converter (14) comprising at least two converter branches (14a, 14b) connected in parallel between a power source and/or load (12) and a transformer (16). A method for controlling the electrical converter (14) comprises: measuring a DC link voltage (vdc,I, vdc,II) and determining a reference DC link voltage vdc,Iref,vdc,IIref of a DC link (26) of each converter branch (14a, 14b); calculating a measured sum voltage (vdc,sum), which is the sum of the measured DC link voltages (vdc,I, vdc,II), and at least one measured difference voltage (vdc,diff), which is the difference of two of the at least two measured DC link voltages (vdc,I, vdc,II); calculating a reference sum voltage vdc,sumref, which is the sum of the reference DC link voltages vdc,Iref,vdc,IIref and at least one reference difference voltage vdc,diffref, which is the difference of two of the at least two reference DC link voltages vdc,Iref,vdc,IIref ; calculating a sum voltage error (Δvdc,sum), which is the difference of the measured sum voltage (vdc,sum) and the reference measured sum voltage vdc,sumref, and at least one difference voltage error (Δvdc,diff), which is the difference of the measured difference voltage (vdc,diff) and the reference difference voltage vdc,diffref; determining a sum reference quantity id,sumref,Te,sumref from the sum voltage error (Δvdc,sum) by inputting the sum voltage error (Δvdc,sum) into a sum PI controller (40a); determining at least one difference reference quantity id,diffref,Te,diffref from the at least one difference voltage error (Δvdc,diff) by inputting the difference voltage error (Δvdc,diff) into a difference PI controller (40b), wherein a gain (kp,sum) of the sum PI controller (40a) is higher than a gain (kp,diff) of the difference PI controller (40b); and controlling the converter branches (14a, 14b) based on the sum reference quantity id,sumref,Te,sumref and the at least one difference reference quantity id,diffref,Te,diffref.