Predictive Control of Cascaded H-Bridge Converters Under Unbalanced Power Generation
Predictive Control of Cascaded H-Bridge Converters Under Unbalanced Power Generation
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DOI：
10.1109/tie.2016.2605618
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发表时间：
2017
影响因子：
7.7
通讯作者：
R. Aguilera;P. Acuña;Yifan Yu;G. Konstantinou;C. Townsend;Bin Wu;V. Agelidis
中科院分区：
文献类型：
--
作者：
R. Aguilera;P. Acuña;Yifan Yu;G. Konstantinou;C. Townsend;Bin Wu;V. Agelidis
本文提出了一种并网级联 H 桥 (CHB) 变换器各相发电不平衡情况下的预测控制策略。所提出的控制器属于有限控制集模型预测控制 (FCS-MPC) 系列，旨在从每个 CHB 转换器相位提取不平衡功率，同时向电网提供平衡功率。该策略的关键新颖之处在于将各相之间的不平衡发电明确地考虑到最优控制问题中。通过强制 CHB 转换器与合适的零序电压组件一起工作来实现功率平衡。所提出的预测控制器直接在原始 abc 框架中公式化以考虑共模电压。仿真和实验结果验证了所提出的 FCS-MPC 策略的有效性。
This paper presents a predictive control strategy for grid-connected cascaded H-bridge (CHB) converters under unbalanced power generation among each converter phase. The proposed controller belongs to the finite-control-set model predictive control (FCS-MPC) family and is designed to extract unbalanced power from each CHB converter phase while providing balanced power to the grid. The key novelty of this strategy lies in the way the unbalanced power generation among the phases is explicitly considered into the optimal control problem. Power balance is achieved by enforcing the CHB converter to work with a suitable zero-sequence voltage component. The proposed predictive controller is directly formulated in the original abc-framework to account for the common-mode voltage. Simulation and experimental results are provided to verify the effectiveness of the proposed FCS-MPC strategy.