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首页> 外文期刊>CES Transactions on Electrical Machines and Systems >Analysis of transforming dq impedances of different converters to a common reference frame in complex converter networks
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Analysis of transforming dq impedances of different converters to a common reference frame in complex converter networks

机译：不同转换器的DQ阻抗转换为复合转换网络中的公共参考帧的DQ阻抗

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摘要

DQ impedance-based method has been widely used to study the stability of three-phase converter systems. As the dq impedance model of each converter depends on its local dq reference frame, the dq impedance modeling of complex converter networks gets complicated. Because the reference frames of different converters might not fully align, depending on the structure. Thus, in order to find an accurate impedance model of a complex network for stability analysis, converting the impedances of different converters into a common reference frame is required. This paper presents a comprehensive investigation on the transformation of dq impedances to a common reference frame in complex converter networks. Four different methods are introduced and analyzed in a systematic way. Moreover, a rigorous comparison among these approaches is carried out, where the method with the simplest transformation procedure is finally suggested for the modeling of complex converter networks. The performed analysis is verified by injecting two independent small-signal perturbations into the d and the q axis, and doing a point-by-point impedance measurement.
机译：基于DQ阻抗的方法已被广泛用于研究三相转换器系统的稳定性。随着每个转换器的DQ阻抗模型取决于其本地DQ参考帧，复杂转换器网络的DQ阻抗建模变得复杂。因为不同转换器的参考帧可能无法完全对齐，所以根据结构。因此，为了找到用于稳定性分析的复杂网络的精确阻抗模型，需要将不同转换器的阻抗转换为公共参考帧。本文介绍了对复杂转换网络中的普通参考帧的DQ阻抗转换的全面调查。以系统的方式引入并分析了四种不同的方法。此外，执行这些方法之间的严格比较，其中最终提出了具有最简单变换过程的方法，用于复制转换器网络的建模。通过将两个独立的小信号扰动注入D和Q轴，并进行点对点阻抗测量来验证执行的分析。

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