This two-part paper presents a general method to model three-phase ac-dc converters as two-port networks for power system stability studies. Part I of the work has developed the two-port network models and identified two types of transfer characteristics that are unique to ac-dc converters and important for system stability. Part II presents the applications of the developed models in stability analysis of different power systems that use ac-dc converters, including grid integration of converter-based generation from wind, PV and other renewable sources, grid-connected dc microgrids and dc distributed power systems, high-voltage dc transmission, as well as hybrid ac-dc power systems. While impedance-based stability analysis has been studied for each of these systems, the new two-port models, especially the transfer immittance models, make it possible and easy to formulate more complete system models to include dynamics and coupling effects that have been ignored or impossible to consider in the past. The methods to study the stability of each type of systems are explained and illustrated by case studies that also highlight the effects of coupling modeled by the transfer immittances on system stability. Each case study also exemplifies a practical stability concern in converter-based power systems.

中文翻译：

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AC-DC 转换器的双端口表征和传输导抗》第二章：应用


这篇由两部分组成的论文提出了一种将三相 AC-DC 转换器建模为两端口网络的通用方法，用于电力系统稳定性研究。该工作的第一部分开发了双端口网络模型，并确定了交流-直流转换器特有且对系统稳定性很重要的两种传输特性。第二部分介绍了所开发的模型在使用交直流转换器的不同电力系统稳定性分析中的应用，包括风能、光伏和其他可再生能源基于转换器的发电并网、并网直流微电网和直流分布式电力系统、高压直流输电，以及混合交直流电力系统。虽然已经针对每个系统研究了基于阻抗的稳定性分析，但新的二端口模型，尤其是传输导抗模型，使得可以且容易地制定更完整的系统模型，以包括已被忽略或被忽略的动力学和耦合效应。过去不可能考虑。通过案例研究解释和说明了研究每种类型系统稳定性的方法，同时还强调了通过传输导抗建模的耦合对系统稳定性的影响。每个案例研究还举例说明了基于转换器的电力系统中的实际稳定性问题。