Control scheme in hybrid synchronous stationary frame for PWM AC/DC converter under generalized unbalanced operating conditions
Control scheme in hybrid synchronous stationary frame for PWM AC/DC converter under generalized unbalanced operating conditions
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DOI：
10.1109/ias.2004.1348788
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发表时间：
2006
影响因子：
4.4
通讯作者：
Yongsug Suh;T. Lipo
中科院分区：
文献类型：
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作者：
Yongsug Suh;T. Lipo
本文提出了一种改善脉宽调制AC/DC变换器在广义不平衡工作条件下瞬态响应的新控制方案。通过在正、负旋转同步坐标系中采用双电流调节器，避免了用于提取正、负序分量的总带宽减小滤波器/功能块。由于120 Hz交流信号的稳态误差已减少采用谐振增益路径的电流调节器。本文还提出了瞬时有功/无功功率调节中参考电流的简化计算方案。与以前的工作相比，所提出的控制方法具有更好的瞬态响应，在广义的不平衡工作条件（不平衡的输入电源和不平衡的输入阻抗）的宽范围的补偿，同时仍然满足单位输入功率因数校正和无纹波直流输出电压调节，而无需添加任何外部硬件。提出的控制系统进行了分析和调整的基础上的交流小信号扰动模型下的不平衡。仿真和实验结果证实了所提出的控制方法在严重的不平衡运行条件下。
This paper proposes a new control scheme of improved transient response for the pulsewidth-modulation ac/dc converter under generalized unbalanced operating conditions. The overall-bandwidth diminishing filter/functional block for extracting positive and negative sequence components has been avoided by employing dual current regulators in positive- and negative-rotating synchronous frames. The steady-state error due to 120-Hz ac signals has been reduced by employing a resonant-gain path in the current regulator. This paper also proposes simplified current-reference calculation scheme in the regulation of instantaneous active/reactive power. Compared to the previous works, the proposed control method has better transient response in compensation for generalized unbalanced operating conditions (unbalanced input supply and unbalanced input impedances) of wide range while still satisfying unity input power-factor correction and ripple-free dc-output-voltage regulation without adding any external hardware. The proposed control system has been analyzed and tuned based on the ac small signal perturbed model under unbalance. Simulation and experimental results confirm the proposed control method under severe unbalanced operating conditions.