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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
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.
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公开(公告)号：US20240069085A1
公开(公告)日：2024-02-29
申请号：US18269548
申请日：2021-12-17
Applicant: ABB Schweiz AG
Inventor： Eduardo Rohr , Marc Ribò Roca
CPC classification number: G01R31/016 , H02M1/126 , H02M7/487 , H02M7/521
Abstract: A converter device is provided. The converter device includes a filter circuit, a DC link and an active rectifier interconnected between the filter circuit and the DC link. A method for determining at least one parameter (b) of the filter circuit is also provided. The method includes switching the active rectifier into an active state, where a first active rectifier leg connects a first phase of the filter circuit with a positive side of the DC link and a second active rectifier leg connects a second phase of the filter circuit with a negative side of the DC link; determining a time series (y) of current values by measuring a current through the filter circuit; and determining the at least one parameter (b) of the filter circuit by calculating a best fit of the at least one parameter (b) from a difference equation of the filter circuit.
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公开(公告)号：US10855215B2
公开(公告)日：2020-12-01
申请号：US16659144
申请日：2019-10-21
Applicant: ABB Schweiz AG
Inventor： Matthias Baechle , Rudolf Wieser , Peter Al-Hokayem , Eduardo Rohr
Abstract: The application relates to a power generation system, including a synchronous generator for converting mechanical power into electrical power at an output side configured for connecting an AC power grid, a first rectifier and a second rectifier each having an AC side connected to the output side of the generator and a DC side, an exciter configured for exciting the, and a selector device having an input side and an output side, the input side connected to the DC side of the first rectifier and to the DC side of the second rectifier and the output side connected to the exciter, the selector device is configured for switching the DC sides in series or in parallel or for transmitting DC power from the first rectifier and the second rectifier corresponding to an arbitrary split ratio to the output side.
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公开(公告)号：US10516328B2
公开(公告)日：2019-12-24
申请号：US15877333
申请日：2018-01-22
Applicant: ABB Schweiz AG
Inventor： Vedrana Spudic , Eduardo Rohr , Tobias Geyer , Peter Al-Hokayem
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.
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Patent Agency Ranking
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.
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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
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.
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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
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.
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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.
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公开(公告)号：US20200052629A1
公开(公告)日：2020-02-13
申请号：US16659144
申请日：2019-10-21
Applicant: ABB Schweiz AG
Inventor： Matthias Baechle , Rudolf Wieser , Peter Al-Hokayem , Eduardo Rohr
Abstract: The invention relates to a power generation system, comprising a synchronous generator (3) for converting mechanical power into electrical power at an output side configured for connecting an AC power grid (1), a first rectifier (12) and a second rectifier (13) each having an AC side (14) connected to the output side of the generator (3) and a DC side (15), an exciter (9) configured for exciting the, and a selector device (18) having an input side (17) and an output side (19), the input side (17) connected to the DC side (15) of the first rectifier (12) and to the DC side (15) of the second rectifier (13) and the output side (19) connected to the exciter (9), whereby the selector device (18) is configured for switching the DC sides (15) in series or in parallel or for transmitting DC power from the first rectifier (12) and the second rectifier (13) corresponding to an arbitrary split ratio to the output side (19).
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