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。