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.

公开(公告)号：US20200350847A1

公开(公告)日：2020-11-05

申请号：US16927143

申请日：2020-07-13

Applicant: ABB Schweiz AG

Inventor： Tobias Geyer ,  Vedrana Spudic ,  Christof Gutscher ,  Andrea Rueetschi

IPC: H02P27/12 ,  H02M7/487

Abstract: A method for controlling a three-phase electrical converter including: 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 aincludes 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：US20190190397A1

公开(公告)日：2019-06-20

申请号：US16272234

申请日：2019-02-11

Applicant: ABB Schweiz AG

Inventor： Wim Van-Der-Maerwen ,  Tobias Geyer ,  Mario Schweizer ,  Ioannis Tsoumas

IPC: H02M5/458 ,  H02M7/487 ,  H02M7/49

CPC classification number: H02M5/4585 ,  H02M7/487 ,  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.

公开(公告)号：US11784583B2

公开(公告)日：2023-10-10

申请号：US17601312

申请日：2020-03-03

Applicant: ABB Schweiz AG

Inventor： Mario Schweizer ,  Tobias Geyer ,  Ioannis Tsoumas

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

CPC classification number: H02M7/49 ,  H02M1/007 ,  H02M7/483 ,  H02M7/487

Abstract: An electrical converter includes a main converter for generating a first output voltage and a converter cell for converting the first output voltage into a second output voltage. A method for operating an electrical converter includes: receiving a reference voltage for the electrical converter; pulse width modulating the reference voltage with a first modulation frequency for generating a first switching signal for the main converter; switching the main converter with the first switching signal to generate the first output voltage; estimating the first output voltage from the first switching signal; determining a voltage error by subtracting the estimated first output voltage from the reference voltage; pulse width modulating the voltage error with a second modulation frequency, which is higher than the first modulation frequency, for generating a further switching signal for the converter cell; and switching the converter cell with the further switching signal to generate the second output voltage.

公开(公告)号：US20220368247A1

公开(公告)日：2022-11-17

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

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：US10530275B2

公开(公告)日：2020-01-07

申请号：US16342440

申请日：2016-10-21

Applicant: ABB SCHWEIZ AG

Inventor： Michail Vasiladiotis ,  Alexandre Christe ,  Tobias Geyer

IPC: H02M7/5387 ,  H02M1/12 ,  H02M7/483

Abstract: In a method of controlling a DC-to-AC Modular Multilevel Converter (MMC) having a three-phase AC side connected to a three-phase AC network and having a DC side connected to a DC network, the MMC has a double-star topology with a plurality of phase-legs. Each phase-leg has a first branch and a second branch. Each of the first and second branches includes a plurality of series connected converter cells. The method includes obtaining an Optimized Pulse Pattern (OPP) for the MMC. The method also includes adapting the OPP to the MMC by means of closed-loop pulse pattern control. The method also includes, based on the adapted OPP, sending firing signals to the plurality of cells of each branch.

公开(公告)号：US20180131266A1

公开(公告)日：2018-05-10

申请号：US15865426

申请日：2018-01-09

Applicant: ABB Schweiz AG

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

IPC: H02M1/12 ,  H02M7/217

CPC classification number: H02M1/12 ,  H02M7/217 ,  H02M7/53873 ,  H02M2001/0012 ,  H02M2001/0038

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：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.