A Simple Single-Input–Single-Output (SISO) Model for a Three-Phase PWM Rectifier
A Simple Single-Input–Single-Output (SISO) Model for a Three-Phase PWM Rectifier
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DOI：
10.1109/tpel.2008.2012529
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发表时间：
2009-03
影响因子：
6.7
通讯作者：
B. Yin;Ramesh Oruganti;S. K. Panda;A. Bhat
中科院分区：
文献类型：
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作者：
B. Yin;Ramesh Oruganti;S. K. Panda;A. Bhat
在平衡条件下控制三相脉宽调制（PWM）整流器的挑战在于，文献报道的状态空间平均模型具有多输入多输出的非线性结构，并且具有非最小相位特征。本文通过适当的非线性前馈解耦将d轴和q轴动力学分离，同时保持近似统一的功率因数运行，构建了简单的单输入-单输出模型。采用该模型，交直流整流器固有的非最小相位特征变成了出现在小信号控制-输出传递函数中的简单的右半平面零。此外，该模型在大信号和小信号工作条件下都与DC-DC升压变换器非常相似。这使得将DC-DC变换器的系统分析和控制设计技术扩展到三相PWM整流器也成为可能。在PWM整流器开环工作的频域实验中，验证了该模型的有效性。通过电压模式和基于内电流环的整流器的闭环运行，进一步证明了该模型的有效性。
The challenge in controlling a three-phase pulsewidth modulation (PWM) rectifier under balanced conditions arises from the fact that the state-space averaged model reported in literature has a multi-input-multi-output nonlinear structure and furthermore exhibits a nonminimum phase feature. In this paper, a simple single-input-single-output model is constructed by separating the d -axis and the q-axis dynamics through appropriate nonlinear feedforward decoupling while maintaining nearly unity power factor operation. With the proposed model, the nonminimum phase feature inherent in an AC-to-DC rectifier becomes a simple right-half-plane zero appearing in the small-signal control-to-output transfer function. In addition, the model exhibits a close similarity to a DC-DC boost converter under both large-signal and small-signal operating conditions. This makes it possible to extend the system analysis and control design techniques of DC-DC converters to the three-phase PWM rectifier also. The validity of the proposed model has been verified experimentally in the frequency domain under open-loop operation of the PWM rectifier. The usefulness of the model is further demonstrated through closed-loop operation of the rectifier with both voltage mode and inner-current-loop-based schemes.