An optimization-based control strategy for modular multilevel converters: Design and implementation
An optimization-based control strategy for modular multilevel converters: Design and implementation
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基于优化的模块化多电平转换器控制策略：设计与实现
DOI：
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发表时间：
2015
期刊：
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通讯作者：
J. Vannier
中科院分区：
文献类型：
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作者：
N. Stankovic;G. Bergna;A. Arzande;E. Berne;Philippe Egret;J. Vannier
本文提出了一种基于优化的设计参考循环电流的方法，以稳定模块化多电平变换器的内部动态。该过程依赖于无约束凸优化，并考虑到诸如减少循环电流和臂电压的振荡分量等相互冲突的性能要求。这样一个参考信号的跟踪是由一个鲁棒跟踪控制器保证的，其增益选择是为了衰减测量噪声。由于我们对使用数字模拟器实现控制算法感兴趣，因此设计过程在离散时间域中进行。在一个具有RL负载的5个子模块的三相模块化多电平变换器样机上验证了该策略的有效性。
In this paper we present an optimization-based procedure for designing a reference circulating current which stabilizes the internal dynamics of a modular multilevel converter. This procedure relies on unconstrained convex optimization and it takes into account conflicting performance requirements such as reducing the oscillating components of circulating current and arm voltages. Tracking of such a reference signal is ensured by a robust tracking controller with gains chosen in order to attenuate the measurement noise. Since we were interested in implementation of the control algorithm by using a digital simulator, the design procedure is carried out in the discrete-time domain. Effectiveness of the proposed strategy is confirmed on a prototype of three-phase modular multilevel converter with five sub-modules per arm and RL load.