Input Impedance Modeling of Line-Frequency Rectifiers by the Method of Impedance Mapping

2006 IEEE Workshops on Computers in Power Electronics Pub Date : 2006-07-16 DOI:10.1109/COMPEL.2006.305654

J. Sun, J. Colon, K. Karimi

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引用次数: 15

Abstract

This paper presents a systematic method for modeling small-signal input impedance of line-frequency AC-DC converters. The objective is to develop proper models that can be used for stability analysis of AC power systems with significant DC loads powered by such converters. The proposed modeling method uses harmonic linearization and Fourier analysis techniques to describe the current and voltage mapping process through the converter switching circuit. The voltage and current mapping relations are then combined to give an impedance mapping model which converts the impedance of any circuit or system connected to the DC output of converter into a corresponding small-signal input impedance of the converter at the AC side. Similar relations can be used to map the AC source impedance into the DC side to give the equivalent DC source impedance for stability analysis of the DC subsystem. This paper focuses on the basic principle of the impedance mapping method and uses a single-phase diode rectifier circuit to demonstrate the modeling process. The resulting AC input impedance model is validated by detailed circuit simulation as well as experimental measurements

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基于阻抗映射法的线频整流器输入阻抗建模

本文提出了一种系统的线频交直流变换器小信号输入阻抗建模方法。目标是开发适当的模型，可用于由这种变流器供电的具有重要直流负载的交流电力系统的稳定性分析。所提出的建模方法采用谐波线性化和傅立叶分析技术来描述通过变换器开关电路的电流和电压映射过程。然后将电压和电流映射关系结合起来，给出阻抗映射模型，该模型将连接到变换器直流输出端的任何电路或系统的阻抗转换为变换器交流侧相应的小信号输入阻抗。类似的关系可以用来将交流源阻抗映射到直流侧，从而得到等效的直流源阻抗，用于直流子系统的稳定性分析。本文重点介绍了阻抗映射法的基本原理，并以单相二极管整流电路为例演示了建模过程。通过详细的电路仿真和实验测量验证了所得到的交流输入阻抗模型

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2006 IEEE Workshops on Computers in Power Electronics

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