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公开(公告)号：US20180267085A1
公开(公告)日：2018-09-20
申请号：US15982469
申请日：2018-05-17
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem
CPC分类号： G01R19/2503 , G01R19/0007 , G01R19/2509 , G01R19/2513 , G01R23/02 , G01R23/20 , G01R25/00 , H02J3/40 , H02M1/00 , H02M1/082 , H02M5/4585 , H02M7/12 , H02M2001/0025
摘要： A method for estimating a fundamental component of an AC voltage includes receiving a timely varying measurement signal of the AC voltage; parametrizing a fundamental component of the AC voltage; and determining parameters of the fundamental component based on minimizing a cost function. The fundamental component has a rated frequency, a variable amplitude and a variable phase shift. The cost function is based on an integral of a norm of a difference between the measurement signal and the parametrized fundamental component via a time horizon. The time horizon starts at an actual time point and goes back via a predefined length. The cost function includes a term based on a norm of the difference between a value of the fundamental component at the actual time point and a value of a previously estimated fundamental component at the actual time point, where the previously estimated fundamental component has been determined for a previous time point.
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公开(公告)号：US10020753B2
公开(公告)日：2018-07-10
申请号：US15804713
申请日：2017-11-06
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem
CPC分类号： H02M5/44 , H02M1/12 , H02M5/4585 , H02M2001/0048 , H02M2001/0067 , H02P23/0004
摘要： The present application is directed to an electrical converter having at least one of an active rectifier and an inverter interconnecting an electrical source with an electrical load. A method for controlling the electrical converter includes receiving at least one estimated control variable, receiving at least one outer loop control variable provided by an outer control loop and determining a control region based on a control error and selecting control parameters based on the control region. The control method then predicts at least one reference control value based on a solution of a physical model of the electrical converter. The solution is based on a constraint that minimizes a difference between the at least one estimated control variable and the at least one outer loop control variable. The control method then determines switching states of the electrical converter based on the reference control value.
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公开(公告)号：US20200228047A1
公开(公告)日：2020-07-16
申请号：US16737455
申请日：2020-01-08
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem , Pieder Joerg
IPC分类号： H02P29/50
摘要： A drive system includes at least one electrical machine and a plurality of rotating components, which are interconnected via shafts. A method for damping torsional oscillations in the drive system includes: determining angular speeds for at least one of the shafts based on measurements in the drive system; determining a damping torque from the angular speeds with a function that models at least some of the electrical machine, the rotating components and the shafts; adapting a reference torque for the at least one electrical machine by adding the damping torque; and controlling the at least one electrical machine with the adapted reference torques.
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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
申请人： ABB Schweiz AG
摘要： 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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公开(公告)号：US10404155B2
公开(公告)日：2019-09-03
申请号：US15687206
申请日：2017-08-25
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem , Ivan Pejcic
摘要： A method for controlling an electrical converter system, including: determining a reference output (ωm*) and an estimated output (ωm) of the electrical converter system based on measurements in the electrical converter system; determining an optimized pulse pattern (ui,n) by selecting from a table of precalculated optimized pulse patterns, which is chosen based on the reference output (ωm*) and the estimated output (ωm), a pulse pattern including a sequence of switching instants (t*) applied to the electrical converter system; determining a resonant oscillation (ψs,h) in the electrical converter system, the resonant oscillation(ψs,h) is composed of an electrical machine and a LC filter of the electrical converter system; determining a sequence of future states of the electrical converter system by solving a mathematical model of the electrical converter system subject to optimizing a cost function and subject to a constraint that a modified pulse pattern (ui) is applied to the electrical converter system, which modified pulse pattern (ui) comprises time shifted switching instants with respect to the optimized pulse pattern (ui,n), wherein the cost function comprises a term compensating the resonant oscillation (ψs,h) with a pulse response oscillation caused by the time shifted switching instants of the modified pulse pattern (ui) and wherein the mathematical model is constrained such that the switching instants of the modified pulse pattern (ui) have the same order as the switching instants of the optimized pulse pattern (ui,n); applying the modified pulse pattern (ui) to the electrical converter system.
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公开(公告)号：US11251742B2
公开(公告)日：2022-02-15
申请号：US16737455
申请日：2020-01-08
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem , Pieder Joerg
摘要： A drive system includes at least one electrical machine and a plurality of rotating components, which are interconnected via shafts. A method for damping torsional oscillations in the drive system includes: determining angular speeds for at least one of the shafts based on measurements in the drive system; determining a damping torque from the angular speeds with a function that models at least some of the electrical machine, the rotating components and the shafts; adapting a reference torque for the at least one electrical machine by adding the damping torque; and controlling the at least one electrical machine with the adapted reference torques.
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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
申请人： ABB Schweiz AG
发明人： Eduardo Rohr , Peter Al-Hokayem , Tobias Geyer
CPC分类号： H02M1/12 , H02M7/217 , H02M7/53873 , H02M2001/0012 , H02M2001/0038
摘要： 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：US20180062531A1
公开(公告)日：2018-03-01
申请号：US15804713
申请日：2017-11-06
申请人： ABB Schweiz AG
发明人： Peter Al-Hokayem
IPC分类号： H02M5/44
CPC分类号： H02M5/44 , H02M1/12 , H02M5/4585 , H02M2001/0048 , H02M2001/0067 , H02P23/0004
摘要： An electrical converter comprises at least one of an active rectifier and an inverter interconnecting an electrical source with an electrical load. A method for controlling an electrical converter comprises: receiving at least one estimated control variable, which is estimated from measurement values measured in the electrical converter; receiving at least one outer loop control variable provided by an outer control loop, the at least one outer loop control variable providing a desired steady-state operation point of the electrical converter; determining a control region based on a control error, which is a difference between the at least one estimated control variable and the at least one outer loop control variable, wherein the control region is defined by one or more intervals of one or more control variables; selecting control parameters based on the control region, wherein, when the control error is in an inner control region, first control parameters are selected, and, when the control error is outside the inner control region but inside an outer control region, second control parameters are selected; switching, based on the control error, between two and more control methods, which differ in control parameters, by predicting at least one reference control value based on a solution of a physical model of the electrical converter, which comprises the selected control parameters, the physical model being based on differential equations modelling the at least one estimated control variable and the solution being based on a constraint minimizing a difference between the at least one estimated control variable and the at least one outer loop control variable; and determining switching states of the electrical converter based on the reference control value.
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9.发明申请公开(公告)号：US20220263445A1
公开(公告)日：2022-08-18
申请号：US17616462
申请日：2019-06-06
申请人： ABB Schweiz AG
IPC分类号： H02P23/14 , H02P25/022
摘要： A synchronous machine includes a stator with stator windings connected with stator terminals to an electrical grid and a rotor with rotor windings rotatable mounted in the stator, wherein a voltage regulator of the synchronous machine is adapted for outputting an excitation signal to adjust a current in the rotor windings for controlling the synchronous machine. A method for determining control parameters for the voltage regulator includes (i) receiving a first time series of values of the excitation signal and a second time series of measurement values of the terminal voltage in the stator terminals, (ii) determining coefficients of a system transfer function of the synchronous machine, and (iii) determining the control parameters for the voltage regulator from the coefficients of the system transfer function.
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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
申请人： ABB Schweiz AG
摘要： 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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