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首页> 外文期刊>Renewable Power Generation, IET >Dynamic properties of a voltage source inverter-based three-phase inverter in photovoltaic application
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Dynamic properties of a voltage source inverter-based three-phase inverter in photovoltaic application

机译：光伏应用中基于电压源逆变器的三相逆变器的动态特性

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摘要

A common practice in the analysis of voltage source inverters is the assumption of a voltage-type input source even in the case of renewable energy sources (RES). When a converter is supplied by an RES, such as a photovoltaic (PV) generator, the dc-link voltage is usually controlled by the inverter to extract maximum power from the source. This study presents an improved dynamic model of grid-connected three-phase renewable-energy-related inverter. For the proposed model to correspond to reality, the true nature of the input source has to be taken into account: an input-voltage-controlled converter has to be analysed so that it is supplied by a current source. Since all real sources are non-ideal, an explicit method to include the source effect on the inverter dynamics is presented, which has not been previously published in the literature. This study shows that the dynamics of the converter change completely when the operating point of a PV generator shifts from the constant current to the constant voltage region. This study shows also that assuming a voltage-type input source for a PV inverter leads to a model that cannot predict the existence of higher-order dynamics and a right-half plane zero in the control-to-output transfer function.
机译：电压源逆变器分析中的一种常见做法是即使在可再生能源（RES）的情况下，也要假定电压型输入源。当由诸如光伏（PV）发电机之类的RES提供转换器时，直流链路电压通常由逆变器控制，以从电源提取最大功率。本研究提出了一种改进的并网三相可再生能源相关逆变器动态模型。为了使所建议的模型与实际情况相对应，必须考虑输入源的真实性质：必须分析输入电压控制的转换器，以便由电流源提供电源。由于所有实际源都不理想，因此提出了一种明确的方法来包括源对逆变器动力学的影响，但该方法尚未在文献中发表。这项研究表明，当光伏发电机的工作点从恒定电流转换到恒定电压区域时，转换器的动力学会完全改变。这项研究还表明，假设光伏逆变器的电压类型输入源会导致无法预测控制到输出传递函数中高阶动力学和右半平面零的存在的模型。

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  • 来源
    《Renewable Power Generation, IET》 |2012年第6期|p.381-391|共11页
  • 作者

    Puukko J.; Suntio T.;

  • 作者单位

    Department of Electrical Energy Engineering, Tampere University of Technology, P.O. Box 692 FI-33101 Tampere, Finland;

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