中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.023 seconds)

    CARRIER BASED MODEL PREDICTIVE CONTROL FOR CONVERTER WITH FILTER CELLS
    1.
    发明公开
    CARRIER BASED MODEL PREDICTIVE CONTROL FOR CONVERTER WITH FILTER CELLS 审中-公开

    公开(公告)号：EP4277109A1

    公开(公告)日：2023-11-15

    申请号：EP22172910.6

    申请日：2022-05-12

    Applicant: ABB SCHWEIZ AG

    Inventor： SCHWEIZER, Mario ,  KIEFERNDORF, Frederick

    IPC: H02M7/483 ,  H02M7/49 ,  H02M1/12 ,  H02M1/00 ,  H02J3/18

    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 intermediate voltage, 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: determining a main pulse pattern (60) for the main stage (12) with pulse width modulation, wherein the main pulse pattern (60) is determined from a voltage reference signal (V ref,abc ) for the output voltage and wherein the main pulse pattern (60) comprises switching instants for the main stage (12) over a next modulation period of the main stage (12); and determining a cell pulse pattern (70) for the filter cell stage (14) with pulse width modulation, wherein the cell pulse pattern (70) is determined from a difference of the voltage reference signal (V ref,abc ) and a main stage voltage signal (62) determined from the main pulse pattern (60) and wherein the cell pulse pattern (70) comprises switching instants for the filter cells (30) over the next modulation period. The method comprises further a model predictive control part (46) comprising the following steps, which are performed several times during the next modulation period: modifying the main pulse pattern (60) and the cell pulse pattern (70) by moving at least one transition time of a switching instant, such that a flux error determined from a difference between an estimated flux of the electrical converter and a reference flux trajectory (76) is minimized; and applying at least a next switching instant from the main pulse pattern (60) and the cell pulse pattern (70) to the electrical converter (10).

    METHOD, COMPUTER PROGRAM, AND CONTROLLER FOR CONTROLLING AN ELECTRICAL CONVERTER, AND COMPUTER-READABLE MEDIUM
    2.
    发明公开
    METHOD, COMPUTER PROGRAM, AND CONTROLLER FOR CONTROLLING AN ELECTRICAL CONVERTER, AND COMPUTER-READABLE MEDIUM 审中-公开

    公开(公告)号：EP4485773A1

    公开(公告)日：2025-01-01

    申请号：EP23181567.1

    申请日：2023-06-26

    Applicant: ABB SCHWEIZ AG

    Inventor： SCHWEIZER, Mario ,  KIEFERNDORF, Frederick

    IPC: H02M1/00 ,  H02M7/483 ,  H02M7/487 ,  H02M7/49

    Abstract: A method for controlling an electrical converter (10) is provided. The electrical converter (10) comprises a main stage (12) adapted for converting a DC voltage into an intermediate voltage having at least two voltage levels and a filter cell stage (14) with a filter cell (30) for each phase of the main stage (12), with the main stage (12) comprising a DC link (20) and with each filter cell (30) being adapted for adding or subtracting a cell voltage of the filter cell (30) to the intermediate voltage. The method comprises the steps of: determining a first optimized pulse pattern (OPP MC,abc ) for the main stage (12) and a second optimized pulse pattern (OPP AF,abc ) for the filter cells (30) from an offline-computed optimized pulse pattern (OPP base ), wherein the first optimized pulse pattern (OPP MC,abc ) comprises switching instants for the main stage (12) over a next computation window ( α win ) and wherein the second optimized pulse pattern (OPP AF,abc ) comprises switching instants for filter cells (30) over the next computation window ( α win ); determining a neutral point potential (V NP ) depending on a measured lower DC link voltage (V bot ) and a measured upper DC link voltage (V top ) of the DC link (20); determining a first balancing signal (U NPbal,abc ) for the main stage (12) depending on the determined neutral point potential (V NP ); determining a second balancing signal (U AFbal,abc ) for the filter cells (30) depending on measured cell voltages (V AFC,abc ) of the filter cells (30); determining a first differential mode voltage (U NPbal,DM,abc ) from the first balancing signal (U NPbal,abc ); determining a second differential mode voltage (U AFbal,DM,abc ) from the second balancing signal (U AFbal,abc ); determining a first voltage change (ΔU MC,abc ) from the first balancing signal (U NPbal,abc ) and the second differential mode voltage (U AFbal,DM,abc ); determining a second voltage change (ΔU AF,abc ) from the second balancing signal (U AFbal,abc ) and the first differential mode voltage (U NPbal,DM,abc ); adjusting the first optimized pulse pattern (OPP MC,abc ) by moving its switching instants depending on the first voltage change (ΔU MC,abc ) over the next computation window ( α win ) and adjusting the second optimized pulse pattern (OPP AF,abc ) by moving its switching instants depending on the second voltage change (ΔU AF,abc ) over the next computation window ( α win ); determining a reference flux trajectory (Ψ ref ) over the next computation window ( α win ) depending on the adjusted first and second optimized pulse pattern (OPP MC,abc , OPP AF,abc ); and controlling the electrical converter (10) depending on the reference flux trajectory (Ψ ref ) and on the adjusted first and second optimized pulse pattern (OPP MC,abc , OPP AF,abc ).

    METHOD AND COMPUTER PROGRAM FOR CONTROLLING AN ELECTRICAL CONVERTER, CONTROLLER FOR CONTROLLING AN ELECTRICAL CONVERTER, ELECTRICAL CONVERTER, AND COMPUTER-READABLE MEDIUM
    3.
    发明公开
    METHOD AND COMPUTER PROGRAM FOR CONTROLLING AN ELECTRICAL CONVERTER, CONTROLLER FOR CONTROLLING AN ELECTRICAL CONVERTER, ELECTRICAL CONVERTER, AND COMPUTER-READABLE MEDIUM 审中-公开

    公开(公告)号：EP4451530A1

    公开(公告)日：2024-10-23

    申请号：EP23168626.2

    申请日：2023-04-19

    Applicant: ABB SCHWEIZ AG

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

    IPC: H02M1/00 ,  H02M1/32 ,  H02M7/487 ,  H02M7/49 ,  H02M7/5395 ,  H02M1/12

    Abstract: An electrical converter (10) and a method for controlling the electrical converter (10) are provided. The electrical converter (10) comprises: a main stage (12), with the main stage (12) being configured for converting a DC voltage into a three phase intermediate voltage and having three main outputs (24), one for each phase of the intermediate voltage; a filter cell stage (14) having three filter cells (30a, 30b, 30c) with each filter cell (30a, 30b, 30c) being coupled to a corresponding one of the three main outputs (24) and being configured for modifying the corresponding phase of the intermediate voltage; and three bypass switches (39) for bypassing the filter cells (30a, 30b, 30c), with each of the three bypass switches (39) being electrically coupled to a corresponding one of the three main outputs (24) and to a converter output (16) of the electrical converter (10), wherein the converter output (16) is coupled to the three filter cells (30a, 30b, 30c) and is configured for providing a three phase output voltage of the electrical converter (10). The method for controlling the electrical converter (10) comprises the steps of: determining a main stage pulse pattern (60) for the main stage (12), wherein the main stage pulse pattern (60) is determined depending on a voltage reference signal (V ref,abc ) for the output voltage and wherein the main stage pulse pattern (60) comprises switching instants for the main stage (12) over a next modulation period of the main stage (12); determining a cell pulse pattern for the filter cell stage (14), wherein the cell pulse pattern is determined from a cell output voltage reference signal (64), which is determined from the voltage reference signal (V ref,abc ) and a main stage voltage signal (62) determined from the main stage pulse pattern (60), and wherein the cell pulse pattern comprises switching instants for the three filter cells (30a, 30b, 30c) over the next modulation period; applying at least a next switching instant determined from the main stage pulse pattern (60) and the cell pulse pattern to the electrical converter (10), when all of the filter cells (30a, 30b, 30c) are working properly; applying at least a next switching instant determined from the main stage pulse pattern (60) and a modified cell pulse pattern (70) to the electrical converter (10), when one of the filter cells (30a, 30b, 30c) fails, wherein the failed filter cell (30a) is bypassed by activating the corresponding bypass switch (39), the modified cell pulse pattern (70) is determined under the assumption that a cell voltage provided by the failed filter cell (30a) is zero, and the intermediate voltage is modified by the two remaining filter cells (30b, 30c) depending on the modified cell pulse pattern (70) in order to provide the output voltage of the electrical converter (10).

    ACTIVE FILTER PRE-CHARGING FOR A CONVERTER WITH ACTIVE FILTER CELLS
    6.
    发明公开
    ACTIVE FILTER PRE-CHARGING FOR A CONVERTER WITH ACTIVE FILTER CELLS 审中-实审

    公开(公告)号：EP4344036A1

    公开(公告)日：2024-03-27

    申请号：EP22196760.7

    申请日：2022-09-21

    Applicant: ABB SCHWEIZ AG

    Inventor： SCHWEIZER, Mario ,  KIEFERNDORF, Frederick ,  VETTERLI, Manuel

    IPC: H02M1/00 ,  H02M1/36 ,  H02M7/483 ,  H02M7/487 ,  H02M1/12

    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, a filter cell stage (14) with a filter cell (30) for each phase of the intermediate voltage, each filter cell (30) being adapted for adding or subtracting a cell voltage of the filter cell (30) to the intermediate voltage, and a pre-charge circuit (44) adapted for pre-charging the filter cells (30) and a DC link (20) of the main stage (12) and comprising an auxiliary power source (46) connected between one phase of an output (34) of the electrical converter (10) and a neutral point (NP) of said DC link (20) of the main stage (12), wherein all phases of the output (34) of the electrical converter (10) are connected via an electrical load (16). A method for pre-charging filter cells (30) during a start-up of an electrical converter (10) comprises a pre-charging of the filter cells (30) comprising the steps of: switching the main stage (12) such that all phases of the output (24) of the main stage (12) are directly connected to the neutral point (NP) of the DC link (20) of the main stage (12); switching at least one of the filter cells (30) into a rectifying state, in which a rectified current flows through a cell capacitor (38) of this filter cell (30); and switching the pre-charge circuit (44) on and charging the cell capacitor (38) of said at least one filter cell (30) by the pre-charge circuit (44), until a nominal cell voltage is achieved at the cell capacitor (38) of this filter cell (30).

    MODEL PREDICTIVE CONTROL FOR CONVERTER WITH FILTER CELLS BASED ON OFFLINE-COMPUTED PULSE PATTERNS AND ONLINE CELL BALANCING
    7.
    发明公开
    MODEL PREDICTIVE CONTROL FOR CONVERTER WITH FILTER CELLS BASED ON OFFLINE-COMPUTED PULSE PATTERNS AND ONLINE CELL BALANCING 审中-公开

    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).

Patent Agency Ranking