Complex state-space modeling and nonlinear control of active front-end converters
Complex state-space modeling and nonlinear control of active front-end converters
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DOI：
10.1109/tie.2005.843919
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发表时间：
2005-04
影响因子：
7.7
通讯作者：
R. Burgos;E. Wiechmann;J. Holtz
中科院分区：
文献类型：
--
作者：
R. Burgos;E. Wiechmann;J. Holtz
本文介绍了有源前端（AFE）转换器的建模和控制，使用复杂的状态空间表示，一种技术开发，迄今主要用于交流电机的分析。特别是，三相PWM电压源和电流源整流器进行了深入研究，使用这种方法的图形功能，即复杂的信号流图。这些都是用来直接和直观地获得高性能的非线性控制律的基础上输入输出反馈线性化。具体而言，级联和一个PWM控制方案的电压源整流器，而级联方案被认为是电流源整流器。在这些策略下，这两个转换器表现出线性和解耦的d-q轴动态，同时也获得了无功功率补偿能力。此外，其各自的直流链路电压和电流环路的线性化完全强制执行并确保其操作稳定性。所有这一切都是在没有输入输出线性化的复杂数学复杂性的情况下实现的，有效地避开了所提出的复杂状态空间方法。最后，从5-kVA的数字信号处理器为基础的实验室原型的实验结果验证了分析和彻头彻尾的表现，这些AFE转换器。
This paper presents the modeling and control of active front-end (AFE) converters using complex state-space representation, a technique developed and thus far mostly employed for the analysis of ac machines. Particularly, three-phase PWM voltage-source and current-source rectifiers are thoroughly studied using the graphical capabilities of this approach, namely, complex signal flow graphs. These are used to directly and intuitively derive high-performance nonlinear control laws based on input-output feedback linearization. Specifically, a cascaded and a paralleled control scheme are investigated for the voltage-source rectifier, whereas a cascaded scheme is considered for the current-source rectifier. Under these strategies both converters exhibit linear and decoupled d-q axes dynamics, while also attaining a reactive power compensation capacity. Moreover, linearization of their respective dc-link voltage and current loops utterly enforces and ensures their operating stability. All this is achieved without the elaborate mathematical complexity of input-output linearization, effectively shunned out by the proposed complex state-space approach. Finally, experimental results from 5-kVA digital-signal-processor-based laboratory prototypes verify the analysis and downright performance evinced by these AFE converters.