公开(公告)号：US10312793B2

公开(公告)日：2019-06-04

申请号：US15865426

申请日：2018-01-09

Applicant: ABB Schweiz AG

Inventor： Eduardo Rohr ,  Peter Al-Hokayem ,  Tobias Geyer

IPC: H02M7/217 ,  H02M1/12 ,  H02M7/5387 ,  H02M1/00

Abstract: A method for operating an electrical converter including: determining an optimized pulse pattern from a fundamental voltage reference for the electrical converter, wherein the optimized pulse pattern is determined from a first lookup table and includes discrete voltage amplitude values changing at predefined switching instants; determining a harmonic content reference from the fundamental voltage reference based on a second lookup table, wherein the harmonic content reference is a harmonic current reference determined from the frequency spectrum of a current of the electrical converter or the harmonic content reference is a filtered voltage reference determined by applying a first order frequency filter to a voltage, which current or voltage is generated, when the optimized pulse pattern is applied to the electrical converter; determining a harmonic content error from the harmonic content reference by subtracting an estimated output voltage and/or estimated output current of the electrical converter from the harmonic content reference; modifying the optimized pulse pattern by timeshifting switching instants such that the fundamental voltage reference is tracked and the harmonic content error is corrected by the timeshifted switching instants; applying the modified optimized pulse pattern to semiconductor switches of the electrical converter.

公开(公告)号：US10074978B2

公开(公告)日：2018-09-11

申请号：US15413125

申请日：2017-01-23

Applicant: ABB Schweiz AG

Inventor： Tobias Geyer ,  Wim Van-Der-Merwe ,  Vedrana Spudic ,  Georgios Darivianakis

IPC: H02J3/01 ,  H02M1/08 ,  H02M1/12 ,  G05B13/04 ,  H02J3/00

CPC classification number: H02J3/01 ,  G05B13/048 ,  H02J3/1821 ,  H02J2003/007 ,  H02M1/08 ,  H02M1/12 ,  H02M7/53873 ,  H02M7/539 ,  H02M7/5395 ,  H02M2007/4835 ,  Y02E40/22 ,  Y02E40/26 ,  Y02E40/30 ,  Y02E40/40

Abstract: A method for controlling a modular converter connected to an electrical grid for active power filtering the electrical grid to compensate for a load connected to the electrical grid, comprises: receiving an actual load current and an actual converter state of the modular converter; determining, from the actual load current and a history of previous load currents, a sequence of future load currents over a prediction horizon; predicting a sequence of future converter states of the modular converter and a sequence of manipulated variables for the modular converter over the prediction horizon by solving an optimization problem based on the actual converter state and the future load currents by minimizing an objective function mapping control objectives to a scalar performance index subject to the dynamical evolution of a prediction model of the modular converter and subject to constraints; and applying a next switching state, which is determined from a first element of the sequence of manipulated variables, to the modular converter.

公开(公告)号：US20180145579A1

公开(公告)日：2018-05-24

申请号：US15877333

申请日：2018-01-22

Applicant: ABB Schweiz AG

Inventor： Vedrana Spudic ,  Eduardo Rohr ,  Tobias Geyer

IPC: H02M1/12 ,  H02M7/487 ,  H02M7/539 ,  H02M7/155

Abstract: A method for controlling a three-phase electrical converter comprises: selecting a three-phase optimized pulse pattern from a table of pre-computed optimized pulse patterns based on a reference flux; determining a two-component optimal flux from the optimized pulse pattern and determine a one-component optimal third variable; determining a two-component flux error from a difference of the optimal flux and an estimated flux estimated based on measurements in the electrical converter; determining a one-component third variable error from a difference of the optimal third variable and an estimated third variable; modifying the optimized pulse pattern by time-shifting switching instants of the optimized pulse pattern such that a cost function depending on the time-shifts is minimized, wherein the cost function comprises a flux error term and a third variable error term, wherein the flux error term is based on a difference of the flux error and a flux correction function providing a flux correction based on the time-shifts and the third variable error term is based on a difference of the third variable error and a third variable correction function providing a third variable correction based on the time-shifts; and applying the modified optimized pulse pattern to the electrical converter.

公开(公告)号：US09831760B2

公开(公告)日：2017-11-28

申请号：US15097209

申请日：2016-04-12

Applicant: ABB Schweiz AG

Inventor： Peter Al-Hokayem ,  Tobias Geyer ,  Nikolaos Oikonomou

IPC: H02M1/12 ,  H02P21/14 ,  H02P23/14 ,  H02P21/30 ,  H02P23/30 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M1/126 ,  G05B2219/41406 ,  H02M7/53873 ,  H02M7/53875 ,  H02M2001/0003 ,  H02P21/141 ,  H02P21/30 ,  H02P23/14 ,  H02P23/30

Abstract: An electrical converter is interconnected via a filter with an electrical load or an electrical power source. A method for controlling the converter comprises the steps of: receiving a reference flux (ψ*i) for the electrical converter; determining output signals (y) comprising currents and/or voltages measured in the filter; determining an estimated flux (ψi) from the output signals (y); determining a corrective flux (ψi,damp) from the output signals (y) based on a mathematical model of the filter and a quadratic cost function; determining control input signals (u) for the electrical converter based on a sum of the estimated flux (ψi) and the corrective flux (ψi,damp); controlling the converter with the control input signals (u); and algorithmic filtering of at least one of the output signals (y) by applying a signal filter to the at least one output signal, which is designed for amplifying the at least one output signal at a resonance frequency of the filter, whereby the corrective flux (ψi,damp) is determined from the filtered output signals.

公开(公告)号：US20250119082A1

公开(公告)日：2025-04-10

申请号：US18836403

申请日：2023-01-23

Applicant: ABB Schweiz AG

Inventor： Georgios Darivianakis ,  Tobias Geyer ,  Peter Muszynski ,  loannis Tsoumas

IPC: H02P21/14 ,  H02P21/12 ,  H02P21/20 ,  H02P27/08

Abstract: A method for controlling an electrical converter for driving an electrical machine comprises the steps of: estimating a stator flux vector depending on at least one measurement in the electrical converter; receiving a rotor speed of the electrical machine; determining an optimized pulse pattern for the electrical converter depending on the rotor speed; determining a rotor angle of a rotor flux vector depending on the rotor speed; determining a reference stator angle of the stator flux vector depending on the rotor angle; determining a reference stator flux vector depending on the optimized pulse pattern and the reference stator angle; determining a difference between the reference stator flux vector and the estimated stator flux vector; modifying switching instants of the optimized pulse pattern, such that the difference is minimized; and applying at least a part of the modified optimized pulse pattern to the electrical converter.

公开(公告)号：US20250047213A1

公开(公告)日：2025-02-06

申请号：US18717812

申请日：2022-12-09

Applicant: ABB Schweiz AG

Inventor： Georgios Darivianakis ,  Eduardo Rohr ,  Frederick Kieferndorf ,  Tobias Geyer

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

Abstract: A method for controlling an electrical converter comprises determining an actual modulation index (m) and an actual pulse number (d); determining a neutral point voltage (vnp) of the neutral point (NP); determining an actual neutral point balancing value from the neutral point voltage (vnp); determining an optimized pulse pattern to be applied to the electrical converter from a table of optimized pulse patterns stored in a controller of the electrical converter; and applying the determined optimized pulse pattern to the electrical converter. The table of optimized pulse patterns is indexed with respect to a set of modulation indices (m) and a set of pulse numbers (d) and the optimized pulse pattern is determined based on the actual modulation index (m) and the actual pulse number (d). For a modulation index (m) and a pulse number (d), an optimized pulse pattern stored in the table comprises switching angles and at least one of a switching state and switching transition of the at least one phase leg for each switching angle. For at least some modulation indices (m) and some pulse numbers (d), an optimized pulse pattern stored in the table with respect to a modulation index (m) and a pulse number (d) comprises switching angles, which correspond to different neutral point balancing values. The switching angles of the optimized pulse pattern to be applied to the electrical converter are determined from the switching angles, which correspond to different neutral point balancing values, as a function of the actual neutral point balancing value.

公开(公告)号：US12119737B2

公开(公告)日：2024-10-15

申请号：US17767793

申请日：2020-09-29

Applicant: ABB Schweiz AG

Inventor： Tobias Geyer ,  Annika Birth

IPC: H02M1/00 ,  H02M7/483 ,  H02M7/525

CPC classification number: H02M1/0012 ,  H02M7/483 ,  H02M1/0025 ,  H02M7/525

Abstract: A method for controlling an electrical converter system is provided herein. The method includes determining a switching signal and a reference trajectory of at least one electrical quantity of the electrical converter system over a horizon of future sampling instants; generating a sequence of averaged switch positions from the switching signal over the horizon; determining a sequence of optimized averaged switch positions with optimized averaged switch positions by optimizing a cost function based on the sequence of averaged switch positions; determining an optimized switching signal for the current sampling interval by moving switching transitions in the switching signal, such that the average of the switching signal with the modified switching transitions equals the optimized averaged switch position; and applying at least the next switching transition of the optimized switching signal for the current sampling interval to the electrical converter system.

公开(公告)号：US20230042964A1

公开(公告)日：2023-02-09

申请号：US17789586

申请日：2020-12-17

Applicant: ABB Schweiz AG

Inventor： Ioannis Tsoumas ,  Tobias Geyer ,  Mario Schweizer ,  Eduardo Rohr ,  Frederick Kieferndorf ,  Wim Van-der-Merwe ,  Manuel Vetterli ,  Christian Meier

IPC: H02M7/487 ,  H02M7/5395 ,  H02M1/12

Abstract: Described herein is a method of operating a power electronic converter device for an electrical power conversion system. The power electronic converter device includes a converter circuit including an input side, an output side, a first converter, and at least one second converter. The second converter includes at least one floating cell with a DC intermediate circuit and semiconductor devices. The method includes: switching the semiconductor devices of the floating cell at switching instants determined with optimized pulse patterns or carrier-based pulse width modulation; determining a fundamental voltage component for the floating cell; and generating the fundamental voltage component in the actual voltage of the floating cell by modifying the switching instants, such that a voltage VC AF of the DC intermediate circuit is lying in a given reference voltage range for balancing the DC intermediate circuit of the floating cell.

公开(公告)号：US20220216803A1

公开(公告)日：2022-07-07

申请号：US17601312

申请日：2020-03-03

Applicant: ABB Schweiz AG

Inventor： Mario Schweizer ,  Tobias Geyer ,  Ioannis Tsuomas

IPC: H02M7/487 ,  H02M1/00

Abstract: An electrical converter (10) comprises a main converter (12) for generating a first output voltage (u1abc) and a converter cell (14a) for converting the first output voltage (u1abc) into a second output voltage (u2abc). A method for operating an electrical converter (10) comprises: receiving a reference voltage (v*abc) for the electrical converter (10); pulse width modulating the reference voltage (v*abc) with a first modulation frequency for generating a first switching signal (s1abc) for the main converter (12); switching the main converter (12) with the first switching signal (s1abc) to generate the first output voltage (u1abc); estimating the first output voltage (v1abc) from the first switching signal (s1abc); determining a voltage error (v*2abc) by subtracting the estimated first output voltage (v1abc) from the reference voltage (v*abc); pulse width modulating the voltage error (v*2abc) with a second modulation frequency, which is higher than the first modulation frequency, for generating a further switching signal (s2abc, s3abc) for the converter cell (14a); and switching the converter cell (14a) with the further switching signal (s2abc, s3abc) to generate the second output voltage (u2abc).

公开(公告)号：US20170133845A1

公开(公告)日：2017-05-11

申请号：US15413125

申请日：2017-01-23

Applicant: ABB Schweiz AG

Inventor： Tobias Geyer ,  Wim Van-Der-Merwe ,  Vedrana Spudic ,  Georgios Darivianakis

IPC: H02J3/01 ,  H02M1/12 ,  G05B13/04 ,  H02M1/08

CPC classification number: H02J3/01 ,  G05B13/048 ,  H02J3/1821 ,  H02J2003/007 ,  H02M1/08 ,  H02M1/12 ,  H02M7/53873 ,  H02M7/539 ,  H02M7/5395 ,  H02M2007/4835 ,  Y02E40/22 ,  Y02E40/26 ,  Y02E40/30 ,  Y02E40/40

Abstract: A method for controlling a modular converter connected to an electrical grid for active power filtering the electrical grid to compensate for a load connected to the electrical grid, comprises: receiving an actual load current and an actual converter state of the modular converter; determining, from the actual I load current and a history of previous load currents, a sequence of future load currents over a prediction horizon; predicting a sequence of future converter states of the modular converter and a sequence of manipulated variables for the modular converter over the prediction horizon by solving an optimization problem based on the actual converter state and the future load currents by minimizing an objective function mapping control objectives to a scalar performance index subject to the dynamical evolution of a prediction model of the modular converter and subject to constraints; and applying a next switching state, which is determined from a first element of the sequence of manipulated variables, to the modular converter.