A Hybrid Control Scheme for Three-Phase Vienna Rectifiers
A Hybrid Control Scheme for Three-Phase Vienna Rectifiers
复制标题
三相维也纳整流器的混合控制方案
DOI：
10.1109/tpel.2017.2661382
复制
发表时间：
2018-01-01
影响因子：
6.7
通讯作者：
Huang, Shoudao
中科院分区：
文献类型：
--
作者：
Li, Xing;Sun, Yao;Huang, Shoudao
维也纳整流器是一种运行约束复杂的功率变换器。因此，传统的控制策略难以控制，特别是在瞬态或低功率因数运行时。本文提出了一种三相维也纳整流器的双环混合控制方案。外环采用比例积分控制器对直流电压和输入无功功率进行调节。内环采用有限集模型预测控制控制输入电流，保持中性点电压平衡。为了降低成本，引入了扩展状态观测器来估计负载电流。针对所提出的控制方案的特点，具有以下优点：1)良好的动态性能；2)工作范围宽，输入无功能力增强；3)较低的计算负担；4)不需要调制方法。仿真和实验结果验证了所提控制方案的正确性和有效性。
Vienna rectifier is a kind of power converter with complicated operating constraints. Thus, it is difficult to control with conventional control strategies, especially during transients or under low power factor operation. This study proposes a hybrid control scheme with dual loops for the three-phase Vienna rectifier. In the outer loop, proportional-integral controller is designed to regulate the dc-link voltage and input reactive power. And in the inner loop, finite set model predictive control is utilized to control the input currents and maintain the neutral point voltage balance. To reduce the costs, an extended state observer is introduced to estimate the load current. In view of the characteristics of the proposed control scheme, it has the following advantages: 1) good dynamic performance; 2) wide operating range and enhanced input reactive power capability; 3) lower computational burden; and 4) without the need of modulation method. The correctness and effectiveness of the proposed control scheme are verified by the simulation and experiment results.