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Control technique for non-linear and unbalance compensation of an integrated magnetics-based three-phase series-shunt-compensated uninterruptible power supply

机译：基于集成磁学的三相串联-并联补偿的不间断电源的非线性和不平衡补偿的控制技术

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摘要

Handling unbalanced and non-linear loads in a three-phase AC power supply has always been a difficult issue. This has been addressed in the literature by either using fast controllers in the fundamental rotating reference frame or using separate controllers in reference frames specific to the harmonics. In the former case, the controller needs to be fast and in the latter case, besides the need for many controllers, negative-sequence components need to be extracted from the measured signal. This study proposes a control scheme for harmonic and unbalance compensation of a three-phase uninterruptible power supply wherein the problems mentioned above are addressed. The control takes place in the fundamental positive-sequence reference frame using only a set of feedback and feed-forward compensators. The harmonic components are extracted by a process of frame transformations and used as feed-forward compensation terms in the positive-sequence fundamental reference frame. This study uses a method wherein the measured signal itself is used for fundamental negative-sequence compensation. As the feed-forward compensator handles the high-bandwidth components, the feedback compensator can be a simple low-bandwidth one. This control algorithm is explained and validated experimentally.
机译：在三相交流电源中处理不平衡和非线性负载一直是一个难题。在文献中已经通过在基本旋转参考系中使用快速控制器或在特定于谐波的参考系中使用单独的控制器解决了这一问题。在前一种情况下，控制器需要快速，而在后一种情况下，除了需要许多控制器之外，还需要从测量信号中提取负序分量。这项研究提出了一种用于三相不间断电源的谐波和不平衡补偿的控制方案，其中解决了上述问题。该控制在基本正序参考系中进行，仅使用一组反馈和前馈补偿器。谐波分量是通过帧变换过程提取的，并用作正序基本参考帧中的前馈补偿项。本研究使用一种方法，其中将测得的信号本身用于基本的负序补偿。当前馈补偿器处理高带宽分量时，反馈补偿器可以是简单的低带宽器件。对该控制算法进行了解释和实验验证。

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  • 来源
    《Power Electronics, IET》 |2012年第1期|p.95-105|共11页
  • 作者

    Roy S.; Umanand L.;

  • 作者单位

    Centre for Electronics Design and Technology, Indian Institute of Science, Bangalore, Karnataka 560012, India;

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