A Hybrid Control Strategy Based on Lagging Reactive Power Compensation for Vienna-Type Rectifier
A Hybrid Control Strategy Based on Lagging Reactive Power Compensation for Vienna-Type Rectifier
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基于滞后无功补偿的Vienna型整流器混合控制策略
DOI：
10.1109/tte.2020.3030277
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发表时间：
2021-06
影响因子：
7
通讯作者：
Zhang Chenghui
中科院分区：
文献类型：
--
作者：
Fu Youliang;Cui Naxin;Song Jinqiu;Chen Zhiyuan;Fu Cheng;Zhang Chenghui
维也纳整流器具有直流电压可控、可实现三电平运行、体积小等优点，在许多领域得到了广泛的应用。然而，由于其特殊的拓扑结构，在过零点附近的输入电流不可避免地会发生畸变。在分析电流畸变产生原因的基础上，提出了一种滞后无功补偿方法。建立了<inline-formula> < text -math符号="LaTeX">$d$ </ text -math></inline-formula>- <inline-formula> < text -math符号="LaTeX">$q$ </ text -math></inline-formula>-轴电流模型，设计了两种有限时间电流控制器，提高了干扰抑制性能。分别证明了<inline-formula> < text -math符号="LaTeX">$d$ </ text -math></inline-formula>- <inline-formula> < text -math符号="LaTeX">$q$ </ text -math></inline-formula>-轴电流系统的渐近收敛性。此外，在不增加系统成本的情况下，采用比例控制器实现中性点电位平衡。仿真和实验结果验证了所提混合控制策略的有效性。与传统控制策略相比，该混合控制策略具有较好的性能和较强的抗扰性。
The Vienna-type rectifier is widely used in many applications due to the merits of controllable dc-link voltage, realizable three-level operation, and compact size. However, the input currents near the zero-crossing point are distorted inevitably due to its special topology. Based on the analysis of the causes of current distortion, a lagging reactive power compensation method is proposed. The <inline-formula> <tex-math notation="LaTeX">$d$ </tex-math></inline-formula>–<inline-formula> <tex-math notation="LaTeX">$q$ </tex-math></inline-formula>-axis current models are developed, and two finite-time current controllers are designed to enhance the interference suppression performance. The asymptotic convergence of the <inline-formula> <tex-math notation="LaTeX">$d$ </tex-math></inline-formula>–<inline-formula> <tex-math notation="LaTeX">$q$ </tex-math></inline-formula>-axis current systems is proved, respectively. In addition, neutral point potential balancing is achieved by employing a proportional controller without increasing the cost of the system. The validity of the proposed hybrid control strategy has been verified by simulation and experimental results. Compared with the conventional strategy, this new hybrid control strategy can help to achieve excellent performance and stronger disturbance rejection.
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