基于谐波线性化的模块化多电平换流器阻抗建模

LYU Jing

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基于谐波线性化的模块化多电平换流器阻抗建模

更新时间：2025-08-13

- 基于谐波线性化的模块化多电平换流器阻抗建模
- Automation of Electric Power Systems Vol. 41, Issue 4, Pages: 136-142(2017)
- 作者机构：
  
  上海交通大学电子信息与电气工程学院风力发电研究中心,上海市,200240
- 作者简介：
- 基金信息：
- DOI：
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- Published：2017
- 稿件说明：
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LYU Jing. [J]. Automation of electric power systems, 2017, 41(4): 136-142.
DOI：

LYU Jing. [J]. Automation of electric power systems, 2017, 41(4): 136-142. DOI：

摘要

模块化多电平换流器(MMC)的小信号阻抗建模是分析含MMC的电力系统谐振及稳定性的关键。MMC是一个多频率、非线性、周期性时变的系统

具有复杂的内部动态特性

传统的小信号建模方法无法直接用于MMC。采用谐波线性化法对MMC的交流侧小信号阻抗进行建模

计及谐波环流和电容电压稳态纹波的影响

并揭示了环流控制对MMC交流侧阻抗的作用机理。利用MATLAB/Simulink搭建三相MMC详细时域仿真模型

仿真测量结果验证了解析模型的正确性。

Abstract

The small-signal impedance modeling of modular multilevel converters(MMCs)is the key for the resonance and stability analysis of MMC-based power systems. MMC is a converter system featuring multi-frequency

nonlinearity and periodically time-varying operation trajectory due to its complex internal dynamics. Hence

traditional small-signal methods cannot be directly applied to MMC. The AC-side small-signal impedance of MMC is modeled by the harmonic linearization method

which has taken into consideration the harmonic circulating current and capacitor voltage steady-state ripples. Furthermore

the influence of the circulating current control on the AC-side impedance of MMC is analyzed. A detailed time-domain simulation model of a three-phase MMC is built by using MATLAB/Simulink and the analytical models are validated by simulation results. This work is supported by National Key Research and Development Program of China(No. 2016YFB0900901).

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