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Avoiding AC/DC grid interaction in MMC based MTDC systems

机译:在基于MMC的MTDC系统中避免AC / DC电网交互

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In this paper, the interaction between ac and dc grids is studied for two types of MMC control structures; conventional and non-conventional control structures. Linear analysis methods that are based mode shapes and participation factors are used to identify dynamic interaction in a hybrid ac-dc power system. The analysis uses as a test system a three terminal Modular Multilevel Converter (MMC) based Multi-terminal High Voltage DC (MTDC) grid connecting three multi-machine asynchronous ac grids. The results show that there is some dynamic interaction between ac and dc grids under conventional MMC converter control structure, while the non-conventional MMC converter control structure decouples the ac and dc side of the MMC converter, thus avoiding interaction between the ac and dc grids.
机译:本文针对两种类型的MMC控制结构研究了交流和直流电网之间的相互作用。常规和非常规控制结构。基于模式形状和参与因子的线性分析方法可用于识别交流/直流混合动力系统中的动态相互作用。该分析使用基于三端模块化多电平转换器(MMC)的多端子高压直流(MTDC)电网作为测试系统,该电网连接了三个多机异步交流电网。结果表明,在常规MMC变换器控制结构下,交流和直流电网之间存在一定的动态相互作用,而非常规MMC变换器控制结构使MMC变换器的交流和直流侧解耦,从而避免了交流和直流电网之间的相互作用。 。

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