公开(公告)号：EP4228143A1

公开(公告)日：2023-08-16

申请号：EP22155947.9

申请日：2022-02-09

Applicant: ABB SCHWEIZ AG

Inventor： DARIVIANAKIS, Georgios ,  GEYER, Tobias ,  MUSZYNSKI, Peter ,  TSOUMAS, Ioannis

IPC: H02M7/5387 ,  H02P23/14

Abstract: A method for controlling an electrical converter (12) for driving an electrical machine (18) comprises the steps of: estimating a stator flux vector ( ψ s ) depending on at least one measurement in the electrical converter (12); determining an optimized pulse pattern (OPP) for the electrical converter (12) depending on a reference angular stator frequency ω S * ; determining a reference stator angle θ S * of the stator flux vector ( ψ s ) depending on the reference angular stator frequency ω S * ; determining a reference stator flux vector ψ S * depending on the optimized pulse pattern (OPP) and the reference stator angle θ S * ; determining a difference between the reference stator flux vector ψ S * and the estimated stator flux vector ( ψ s ) ; modifying switching instants of the optimized pulse pattern (OPP), such that the difference is minimized; and applying at least a part of the modified optimized pulse pattern (OPP) to the electrical converter (12).

公开(公告)号：EP4429061A1

公开(公告)日：2024-09-11

申请号：EP23161135.1

申请日：2023-03-10

Applicant: ABB SCHWEIZ AG

Inventor： HARNEFORS, Lennart ,  TSOUMAS, Ioannis

IPC: H02J3/24 ,  H02J3/36 ,  H02J3/38

CPC classification number: H02J3/381 ,  H02J3/36 ,  H02J2300/2820200101 ,  H02J3/241

Abstract: A method (200) of controlling a wind farm (10) including a plurality of wind turbines (11) installed in an AC subgrid (12), which is connected via a DC line (20) to an energy conversion device (21), the method comprising:
controlling (210) a power infeed of each wind turbine to maintain a setpoint grid frequency;
sensing (212) a grid frequency in the subgrid;
determining (214) a reference quantity based on a difference of the sensed grid frequency and the setpoint grid frequency; and
controlling (216) the energy conversion device in accordance with the determined reference quantity.

公开(公告)号：EP4304073A1

公开(公告)日：2024-01-10

申请号：EP22183835.2

申请日：2022-07-08

Applicant: ABB SCHWEIZ AG

Inventor： KIEFERNDORF, Frederick ,  SCHWEIZER, Mario ,  TSOUMAS, Ioannis

IPC: H02M7/487 ,  H02M1/00 ,  H02M7/483

Abstract: An electrical converter (10) comprises a main stage (12) adapted for converting a DC voltage into an intermediate voltage comprising at least two voltage levels and a filter cell stage (14) with a filter cell (30) for each phase of the main stage (12), each filter cell (30) being adapted for adding or subtracting a cell voltage of the filter cell (30) to the intermediate voltage. A method for controlling an electrical converter (10) comprises a pattern determination part (44) comprising the steps of: selecting and reading an offline-computed optimized pulse pattern (OPP base ) from a database, wherein the selected optimized pulse pattern (OPP base ) comprises switching instants for the main stage (12) and the filter cells (30) over a next computation window ( α win ) of a predetermined width ( α w ); adjusting the optimized pulse pattern (OPP base ) by moving its switching instants such that average output voltages generated in the filter cells (30) are shifted towards an average output voltage reference (U bal,abc ) of the filter cells (30), which is determined from measurements in the filter cells (30), and compensating these adjustments by corresponding modifications of switching instants of the main stage (12). The method comprises further a model predictive control part (46) comprising the following steps, which are performed several times during the next computation window ( α win ): modifying the adjusted optimized pulse patterns (66) by moving at least one transition time of a switching instant, such that a flux error determined from a difference between an estimated flux (74) of the electrical converter (10) and a reference flux trajectory (Ψ ref ) is minimized; and applying at least a next switching instant from the modified adjusted pulse pattern to the electrical converter (10).

公开(公告)号：EP4231516A1

公开(公告)日：2023-08-23

申请号：EP22158052.5

申请日：2022-02-22

Applicant: ABB SCHWEIZ AG

Inventor： TSOUMAS, Ioannis ,  HARNEFORS, Lennart

IPC: H02M7/23 ,  H02P29/50

Abstract: A converter system (14) comprises at least two branches (18), wherein each branch (18) comprises an AC-to-DC converter (26) and a DC link (28) cascade connected with each other. A method for controlling a converter system (14) comprises: determining at least two AC-side currents i I S i II S , each of which is input into one of the AC-to-DC converters (26); determining from the AC-side currents i I S i II S , a voltage reference v av ref v diff ref for each of the AC-to-DC converters (26), such that the AC-side current i I S i II S follows a current reference i av ref i diff ref , for the respective AC-to-DC converter (26); determining a DC link ripple indicator (V dc,av , i dc,av , p av ), which DC link ripple indicator (v dc,av , p av ) is an average DC link voltage (V dc,av ) of the DC links (28), an average DC link current (i dc,av ) of the DC links (28) and/or an average active power (p av ) input into the at least two branches (18); determining a converter reference correction (44) from the DC link ripple indicator (V dc,av , i dc,av , p av ), such that a higher order harmonic in the average DC link voltage (V dc,av ) is damped; determining corrected voltage references v I s ref v II s ref for the AC-to-DC converter (26) by adding the converter reference correction (44) to the voltage references of the AC-to-DC converters (26) or by adding the converter reference correction (45) to an average current reference for the AC-to-DC converters (26); and controlling the AC-to-DC converters (26) with the respective corrected voltage references v I s ref v II s ref .

公开(公告)号：EP4085518A1

公开(公告)日：2022-11-09

申请号：EP20823873.3

申请日：2020-12-16

Applicant: ABB SCHWEIZ AG

Inventor： BURKART, Ralph Mario ,  TSOUMAS, Ioannis ,  KIEFERNDORF, Frederick ,  GEYER, Tobias

IPC: H02M1/12 ,  H02M1/15 ,  H02M7/487 ,  H02M7/49 ,  H02M1/00

公开(公告)号：EP3497782B1

公开(公告)日：2020-09-30

申请号：EP17748805.3

申请日：2017-08-10

Applicant: ABB Schweiz AG

Inventor： VAN-DER-MERWE, Wim ,  GEYER, Tobias ,  SCHWEIZER, Mario ,  TSOUMAS, Ioannis

IPC: H02M7/49

公开(公告)号：EP3497782A1

公开(公告)日：2019-06-19

申请号：EP17748805.3

申请日：2017-08-10

Applicant: ABB Schweiz AG

Inventor： VAN-DER-MAERWEN, Wim ,  GEYER, Tobias ,  SCHWEIZER, Mario ,  TSOUMAS, Ioannis

IPC: H02M7/49

Abstract: A method for controlling a converter system includes: determining, with a first controller stage, an output voltage reference for the converter system; generating, with the first controller stage, switching commands for a main converter based on the output voltage reference, such that the main converter converts an input voltage into an intermediate voltage provided at an output of the main converter and following the output voltage reference; and generating, with a second controller stage, switching commands for a floating converter cell connected to the output of the main converter, such that the floating converter cell converts the intermediate voltage into an output voltage provided at an output of the floating converter cell, wherein the floating converter cell comprises a cell capacitor and a semiconductor switch arrangement for connecting and disconnecting the cell capacitor between the output of the main converter and the output of the floating converter cell.