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    METHOD TO ESTIMATE AN EQUIVALENT GRID IMPEDANCE FOR POWER GENERATORS
    1.
    发明申请
    METHOD TO ESTIMATE AN EQUIVALENT GRID IMPEDANCE FOR POWER GENERATORS 审中-公开
    估算发电机等效网格阻抗的方法

    公开(公告)号：WO2018060130A1

    公开(公告)日：2018-04-05

    申请号：PCT/EP2017/074206

    申请日：2017-09-25

    Applicant: ABB SCHWEIZ AG

    Inventor： ROHR, Eduardo ,  AL-HOKAYEM, Peter ,  BAECHLE, Mathias

    IPC: G01R27/16 ,  G01R19/25

    Abstract: A method for estimating an equivalent impedance (Z eq ) of a power grid (18) comprises: measuring a plurality of measurement values of a generator voltage (V gen ) and a generator current (I gen ) of at least one generator (12) connected to the power grid (18); generating a performance index (J) from the plurality of measurement values, the performance index being a function of the measurement values and the grid impedance (Z eq ); and determining an equivalent impedance (Z eq ) as the grid impedance, which minimizes the performance index (J). The performance index (J) is additionally a function of an angular error (δ), which accounts for a deviation of a grid frequency at a measurement of a measurement value from a nominal grid frequency, and the performance index (J) is additionally minimized with respect to the angular error (δ).

    Abstract translation: 一种用于估计电网（18）的等效阻抗（Z≠eq）的方法包括：测量发电机电压（V sub）的多个测量值， （18）连接的至少一个发电机（12）的发电机电流（I gen）和发电机电流（I gen）。 从所述多个测量值生成性能指标（J），所述性能指标是所述测量值和所述电网阻抗（Z eqq）的函数; 并确定与电网阻抗等效的阻抗（Z eqq），这最小化了性能指数（J）。 性能指标（J）另外是角度误差（δ）的函数，其考虑了测量值与标称电网频率的测量值处的电网频率的偏差，并且性能指标（J）被额外地最小化 关于角度误差（δ）。

    CONTROL OF ELECTRICAL CONVERTER BASED ON OPTIMIZED PULSE PATTERNS
    2.
    发明申请
    CONTROL OF ELECTRICAL CONVERTER BASED ON OPTIMIZED PULSE PATTERNS 审中-公开
    基于优化脉冲模式的电动转换器控制

    公开(公告)号：WO2017005906A1

    公开(公告)日：2017-01-12

    申请号：PCT/EP2016/066291

    申请日：2016-07-08

    Applicant: ABB SCHWEIZ AG

    Inventor： ROHR, Eduardo ,  AL-HOKAYEM, Peter ,  GEYER, Tobias

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

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

    Abstract: A method for operating an electrical converter (12) comprises: determining an optimized pulse pattern (I) from a fundamental voltage reference (II) for the electrical converter (12), wherein the optimized pulse pattern (I) is determined from a first lookup table (30) and comprises discrete voltage amplitude values changing at predefined switching instants (24); determining a harmonic content reference (III) from the fundamental voltage reference (II) based on a second lookup table (34), wherein the harmonic content reference is a harmonic current reference (IV) determined from the frequency spectrum of a current of the electrical converter (12) or the harmonic content reference is a filtered voltage reference (V) 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 (12); determining a harmonic content error (VI) from the harmonic content reference (III) by subtracting an estimated output voltage ( ψ(t) ) and/or estimated output current ( i(t) ) of the electrical converter (12) from the harmonic content reference (III); modifying the optimized pulse pattern (I) by timeshifting switching instants (24) such that the fundamental voltage reference (II) is tracked and the harmonic content error (VI) is corrected by the timeshifted switching instants (24); applying the modified optimized pulse pattern ( v(t) ) to semiconductor switches of the electrical converter (12).

    Abstract translation: 一种用于操作电转换器（12）的方法包括：从用于电转换器（12）的基本电压参考（II）确定优化的脉冲模式（I），其中优化的脉冲模式（I）从第一查找 （30）并且包括在预定义的切换时刻（24）改变的离散电压幅度值; 基于第二查找表（34）从基本电压基准（II）确定谐波含量参考（III），其中谐波含量参考是从电流的电流的频谱确定的谐波电流参考（IV） 转换器（12）或谐波含量基准是当优化的脉冲模式被施加到电转换器（12）时通过将一阶频率滤波器应用于产生该电流或电压的电压而确定的滤波电压基准（V） ; 通过从电谐波中减去电转换器（12）的估计输出电压（ψ（t））和/或估计的输出电流（i（t）），从谐波内容参照（III）中确定谐波含量误差（VI） 内容参考（III）; 通过对切换时刻（24）进行时间移位来修正优化的脉冲模式（I），从而跟踪基本电压基准（II），并通过时移开关瞬间（24）校正谐波含量误差（VI）。 将修改的优化脉冲模式（v（t））应用于电转换器（12）的半导体开关。

    DETERMINING PARAMETERS OF A FILTER CIRCUIT
    3.
    发明申请
    DETERMINING PARAMETERS OF A FILTER CIRCUIT 审中-公开

    公开(公告)号：WO2022136141A1

    公开(公告)日：2022-06-30

    申请号：PCT/EP2021/086383

    申请日：2021-12-17

    Applicant: ABB SCHWEIZ AG

    Inventor： ROHR, Eduardo ,  RIBÒ ROCA, Marc

    IPC: H02M1/12 ,  G01R31/42 ,  G01R31/64 ,  H02M7/5387 ,  H02M7/487

    Abstract: A converter device (10) comprises a filter circuit (16), a DC link (20) and an active rectifier (18) interconnected between the filter circuit (16) and the DC link (20). A method for determining at least one parameter (b) of the filter circuit (16) comprises: switching the active rectifier (18) into an active state, in which a first active rectifier leg (40) of the active rectifier (18) connects a first phase of the filter circuit (16) with a positive side (44) of the DC link (20) and a second active rectifier leg (40) of the active rectifier (18) connects a second phase of the filter circuit (16) with a negative side (46) of the DC link (20); determining a time series (y) of current values by measuring a current through the filter circuit (16) at a plurality of consecutive time steps; and determining the at least one parameter (b) of the filter circuit (16) by calculating a best fit of the at least one parameter (b) from a difference equation of the filter circuit (16) into which the time series of current values is input, wherein the difference equation is a function of current values at different time steps and of the at least one parameter (b).

    POWER GENERATION SYSTEMTECHNICAL FIELD
    4.
    发明申请
    POWER GENERATION SYSTEMTECHNICAL FIELD 审中-公开

    公开(公告)号：WO2018193106A1

    公开(公告)日：2018-10-25

    申请号：PCT/EP2018/060216

    申请日：2018-04-20

    Applicant: ABB SCHWEIZ AG

    Inventor： BAECHLE, Matthias ,  WIESER, Rudolf ,  AL-HOKAYEM, Peter ,  ROHR, Eduardo

    IPC: H02P9/14 ,  H02J3/38

    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).

    CONTROLLING A THREE-PHASE ELECTRICAL CONVERTER
    5.
    发明申请
    CONTROLLING A THREE-PHASE ELECTRICAL CONVERTER 审中-公开
    控制三相电力转换器

    公开(公告)号：WO2017013125A1

    公开(公告)日：2017-01-26

    申请号：PCT/EP2016/067200

    申请日：2016-07-19

    Applicant: ABB SCHWEIZ AG

    Inventor： SPUDIC, Vedrana ,  ROHR, Eduardo ,  GEYER, Tobias ,  AL-HOKAYEM, Peter

    IPC: H02M1/12 ,  H02M7/539 ,  H02M7/483

    CPC classification number: H02M1/12 ,  H02M7/1552 ,  H02M7/487 ,  H02M7/539 ,  H02M2007/4835

    Abstract: A method for controlling a three-phase electrical converter (12) comprises: selecting a three-phase optimized pulse pattern (20) from a table (22) of precomputed optimized pulse patterns based on a reference flux (ψ αβ,ref ); determining a two-component optimal flux {ψ* αβ ) from the optimized pulse pattern (20) and determine a one-component optimal third variable (ζ*); determining a two-component flux error from a difference of the optimal flux ( ψ* αβ ) and an estimated flux (ψ αβ ) estimated based on measurements in the electrical converter; determining a one-component third variable error from a difference of the optimal third variable (ζ*) and an estimated third variable (ζ); modifying the optimized pulse pattern (20) by time-shifting switching instants (28) of the optimized pulse pattern (20) 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 (26) to the electrical converter (12).

    Abstract translation: 一种用于控制三相电转换器（12）的方法包括：基于参考通量（ψαβ，ref）从预先计算的优化脉冲模式的表（22）中选择三相优化脉冲模式（20）; 从优化的脉冲模式（20）确定双分量最优通量{ψ*αβ），并确定单分量最优第三变量（ζ*）; 根据最佳通量（ψ*αβ）的差和基于电转换器中的测量估计的估计通量（ψαβ）确定双分量磁通误差; 根据最佳第三变量（ζ*）和估计的第三变量（ζ）的差确定单分量第三变量误差; 通过对优化的脉冲模式（20）的切换时刻（28）进行时移，从而使得根据时移的成本函数最小化来修改优化的脉冲模式（20），其中成本函数包括通量误差项和 第三可变误差项，其中所述通量误差项基于所述通量误差的差和基于所述时移提供磁通校正的磁通校正函数，并且所述第三可变误差项基于所述第三可变误差的差 以及第三可变校正函数，其基于时移提供第三​​可变校正; 以及将修改的优化脉冲模式（26）应用于电转换器（12）。

    FPGA-BASED MODEL PREDICTIVE CONTROL
    6.
    发明申请
    FPGA-BASED MODEL PREDICTIVE CONTROL 审中-公开
    基于FPGA的模型预测控制

    公开(公告)号：WO2016202623A1

    公开(公告)日：2016-12-22

    申请号：PCT/EP2016/062807

    申请日：2016-06-06

    Applicant: ABB SCHWEIZ AG

    Inventor： GEYER, Tobias ,  ROHR, Eduardo ,  VALLONE, Joel

    IPC: G05B13/04 ,  H02M7/483 ,  H02M7/487

    CPC classification number: H02M7/487 ,  G05B13/048 ,  G05B2219/42058 ,  H02M7/483

    Abstract: An FPGA (22) for controlling an electrical converter (12) comprises an enumeration block (32) adapted for generating possible next switch positions ( s new (k) ) for semiconductor switches of the electrical converter (12) based on an actual applied switch position ( s(k-1) ); a plurality of explorer blocks (28), each explorer block (28) adapted for calculating a cost value ( J ) for a possible next switch position of the semiconductor switches by: receiving a possible next switch position ( s new (k) ); calculating system variables at future time instants from system variables at a current time instant of the electrical converter (12) and the load (24) based on the possible next switch position, wherein the system variables at future time instants are calculated from the system variables at the current time instant with differential equations modelling the electrical converter (12) and the load (24); determining a cost value ( J ) from the system variables at future time instants by evaluating a cost function with the system variables at future time instants; an arbiter block (34) for selecting the next switch position ( s(k) ) to be applied to the electrical converter (12) from the possible next switch positions by: receiving possible next switch positions ( s new (k) ) from the enumeration block (32); selecting a non-operating explorer block (28) and sending a received possible next switch position to the non-operating explorer block; receiving a cost value ( J ) for the respective possible next switch position from a finished explorer block; when all possible next switch positions received from the enumeration block (32) have been processed, selecting the next switch position ( s(k) ) as the possible next switch position ( s new (k) ) with the lowest cost value ( J ). Each explorer block (28) is further adapted for determining a prediction horizon (N) for the possible next switch position (snew(k)) at which at least one of the calculated system variables at future time instants has a deviation from a reference for the system variable, which is bigger than a predefined deviation for the system variable. A prediction horizon (N) for a system variable at future time instants is determined via a linear extrapolation, in which the system variable at the future time instants is calculated from the system variable at the current time instant, and the prediction horizon (N) is determined based on an intersection point of the linearly extrapolated system variable between the current time instant and the future time instant with a maximal possible deviation from a reference of the system variable. Moreover, the intersection point is determined iteratively by a binary search.

    Abstract translation: 用于控制电转换器（12）的FPGA（22）包括适于基于实际应用的开关产生用于电转换器（12）的半导体开关的可能的下一个开关位置（新的（k））的计数块（32） 位置（s（k-1））; 多个勘探块（28），每个勘探块（28）适于通过以下步骤计算半导体开关的可能的下一个切换位置的成本值（J）：接收可能的下一个切换位置（新的（k））; 基于可能的下一个切换位置，在电转换器（12）和负载（24）的当前时刻的系统变量的未来时刻计算系统变量，其中在将来时刻的系统变量根据系统变量 在当前时刻利用微分方程模拟电转换器（12）和负载（24）; 通过在未来时刻用系统变量评估成本函数，确定未来时刻的系统变量的成本值（J）; 一个仲裁块（34），用于通过以下步骤：从可能的下一个切换位置中选择要施加到电转换器（12）的下一个切换位置（s（k））：从 枚举块（32）; 选择不操作的浏览器块（28）并将接收到的可能的下一个切换位置发送到非操作的浏览器块; 从完成的浏览器块接收针对各个可能的下一个切换位置的成本值（J）; 当已经处理从枚举块（32）接收到的所有可能的下一个开关位置时，选择下一个切换位置（s（k））作为具有最低成本值（J）的可能的下一个切换位置（新的（k））， 。 每个浏览器块（28）还适用于确定可能的下一个切换位置（snew（k））的预测水平线（N），在该切换位置处，未来时刻的所计算的系统变量中的至少一个与参考的偏差偏离 系统变量大于系统变量的预定偏差。 通过线性外推法确定未来时刻的系统变量的预测水平线（N），其中在当前时刻从系统变量计算未来时刻的系统变量，并且预测水平线（N） 基于当前时刻和未来时刻之间的线性外推系统变量的交点确定，并且与系统变量的参考具有最大可能偏差。 此外，通过二进制搜索迭代地确定交点。

    CONTROLLING A THREE-PHASE ELECTRICAL CONVERTER
    7.
    发明公开
    CONTROLLING A THREE-PHASE ELECTRICAL CONVERTER 审中-公开

    公开(公告)号：EP3326277A1

    公开(公告)日：2018-05-30

    申请号：EP16751495.9

    申请日：2016-07-19

    Applicant: ABB Schweiz AG

    Inventor： SPUDIC, Vedrana ,  ROHR, Eduardo ,  GEYER, Tobias ,  AL-HOKAYEM, Peter

    IPC: H02M1/12 ,  H02M7/539 ,  H02M7/483

    CPC classification number: H02M1/12 ,  H02M7/1552 ,  H02M7/487 ,  H02M7/539 ,  H02M2007/4835

    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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