公开(公告)号：US20150249381A1

公开(公告)日：2015-09-03

申请号：US14712444

申请日：2015-05-14

Applicant: ABB Technology AG

Inventor： Alessandro ZANARINI ,  Helfried PEYRL ,  Marc-Alexandre BOECHAT ,  Thomas BESSELMANN

IPC: H02M1/08

CPC classification number: H02M1/08 ,  H02P21/00

Abstract: An exemplary method for controlling an electrical converter includes receiving an actual electrical quantity relating to the electrical converter and a reference quantity; determining a future state of the electrical converter by minimizing an objective function based on the actual electrical quantity and the reference quantity as initial optimization variables; and determining the next switching state for the electrical converter from the future state of the electrical converter. The objective function is iteratively optimized by: calculating optimized unconstrained optimization variables based on computing a gradient of the objective function with respect to optimization variables; and calculating optimization variables for a next iteration step by projecting the unconstrained optimization variables on constraints. The computation of the gradient and/or the projection is performed in parallel in more than one computing unit.

Abstract translation: 用于控制电转换器的示例性方法包括接收与电转换器相关的实际电量和参考量; 通过将基于实际电量和参考量的目标函数最小化作为初始优化变量来确定电转换器的未来状态; 以及从所述电转换器的将来状态确定所述电转换器的下一个开关状态。 通过以下方法迭代优化目标函数：通过计算优化变量的目标函数的梯度，计算优化的无约束优化变量; 并通过在约束条件下投射非约束优化变量来计算下一个迭代步骤的优化变量。 在多个计算单元中并行地执行梯度和/或投影的计算。

公开(公告)号：US20150180352A1

公开(公告)日：2015-06-25

申请号：US14638565

申请日：2015-03-04

Applicant: ABB Technology AG

Inventor： Akos MESTER ,  Drazen DUJIC ,  Thomas BESSELMANN

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  B60L9/12 ,  B60L15/2045 ,  B60L2200/26 ,  B60L2210/10 ,  B60L2210/30 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  H02M7/49 ,  H02M2001/0032 ,  H02M2001/0074 ,  Y02T10/645 ,  Y02T10/7216 ,  Y02T10/7241 ,  Y02T10/7283

Abstract: A modular converter is disclosed which includes plural converter cells connected in series on a first side, and connected on a second side, wherein each converter cell includes an AC-to-DC converter connected to the first side and a DC-to-DC converter connected to the second side. Exemplary embodiments estimate power transferred by the modular converter; compare the transferred power with a threshold value; when the transferred power exceeds the threshold value, operate in a normal load operation mode; when the transferred power is below the threshold value, operate in a low load operation mode with reduced switching losses.

Abstract translation: 公开了一种模块转换器，其包括在第一侧串联连接并连接在第二侧的多个转换器单元，其中每个转换器单元包括连接到第一侧的AC-DC转换器和DC-DC转换器 连接到第二侧。 示例性实施例估计由模块化转换器传送的功率; 将传输功率与阈值进行比较; 当传输功率超过阈值时，以正常负载运行模式运行; 当传输功率低于阈值时，以低负载运行模式工作，减少开关损耗。