Multiterminal high-voltage direct-current (MTDC) systems based on voltage-source converters (VSCs) are used for the transmission of large-scale renewable energy generations. Dynamic interactions among different VSCs through the coupling of DC and AC networks become one salient problem in an MTDC system. Self- and en-stabilizing coefficients, which are expressed analytically in the frequency domain with clear math and physical meanings, are defined to quantitatively describe and analyze the interactions of an MTDC system in this article. Some insights behind such interactions are concomitantly revealed by the analytic quantification. In this course, it not only points to the devices and interaction paths causing the oscillations but also illustrates how controller parameters affect the system stability by analytic expressions. This method provides an analytical way to quantify the interactions among VSCs in DC voltage control timescale, henceforth leaving a deeper understanding of the dynamics in an MTDC system.

中文翻译：

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控制控制器：人们可以从控制理论中学到什么软件


基于电压源换流器（VSC）的多端高压直流（MTDC）系统用于大规模可再生能源发电的传输。不同VSC之间通过直流和交流网络的耦合进行动态交互成为MTDC系统中的一个突出问题。本文定义了自稳定系数和自稳定系数，这些系数在频域中进行分析表达，具有明确的数学和物理意义，以定量描述和分析 MTDC 系统的相互作用。分析量化同时揭示了这种相互作用背后的一些见解。在本课程中，它不仅指出了引起振荡的器件和交互路径，而且还通过解析表达式说明了控制器参数如何影响系统稳定性。该方法提供了一种分析方法来量化直流电压控制时间尺度内 VSC 之间的相互作用，从而使人们对 MTDC 系统的动态有更深入的了解。