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HȡE; repetitive voltage control of gridconnected inverters with a frequency adaptive mechanism

机译:HȡE;带有频率自适应机制的并网逆变器的重复电压控制

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摘要

A voltage controller is proposed and implemented for grid-connected inverters based on HȡE; and repetitive control techniques. A frequency adaptive mechanism is introduced to improve system performance and to cope with grid frequency variations. The repetitive control, based on the internal model principle, offers excellent performance for voltage tracking, as it can deal with a very large number of harmonics simultaneously. This leads to a very low total harmonic distortion and improved tracking performance. It turns out that the controller can be reduced to a proportional gain cascaded with the internal model (in a rearranged form), which can be easily implemented in real applications. The proposed controller is experimentally tested to validate its performance, focusing on reducing tracking error and total harmonic distortion, under different scenarios (e.g. in the stand-alone mode or in the grid-connected mode, with or without the frequency adaptive mechanism, with linear or non-linear loads etc).
机译:提出并实现了基于HȡE的并网逆变器电压控制器。和重复控制技术。引入了一种频率自适应机制,以提高系统性能并应对电网频率变化。基于内部模型原理的重复控制具有出色的电压跟踪性能,因为它可以同时处理大量谐波。这导致非常低的总谐波失真并改善了跟踪性能。事实证明,可以将控制器减小到与内部模型级联的比例增益(以重新排列的形式),这可以在实际应用中轻松实现。所提出的控制器经过实验测试,以验证其性能,重点是在不同情况下(例如,在独立模式或并网模式下,无论是否具有频率自适应机制,具有线性),均可以降低跟踪误差和总谐波失真。或非线性负载等)。

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  • 来源
    《Power Electronics, IET》 |2010年第6期|p.925-935|共11页
  • 作者

    Hornik T.; Zhong Q.-C.;

  • 作者单位

    Department of Electrical Engineering and Electronics, The University of Liverpool, UK;

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  • 正文语种 eng
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