基于重复控制的MMC交直流阻抗建模与稳定性分析

SUN Muzi; MA Wenzhong; WANG Yusheng; ZHANG Wenyan; LI Hengshuo; ZHU Yaheng

doi:10.19783/j.cnki.pspc.240550

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基于重复控制的MMC交直流阻抗建模与稳定性分析

更新时间：2025-12-02

- 基于重复控制的MMC交直流阻抗建模与稳定性分析
- Power System Protection and Control Vol. 45, Issue 2, Pages: 163-175(2025)
- 作者机构：
  
  1. (1.中国石油大学(华东)新能源学院,山东,青岛,266580
  2. 中国石油天然气股份有限公司规划总院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.240550
  CLC： TM46;TM712
- Published：2025
- 稿件说明：
移动端阅览
SUN Muzi, MA Wenzhong, WANG Yusheng, et al. 基于重复控制的MMC交直流阻抗建模与稳定性分析[J]. Power System Protection and Control, 2025, 45(2): 163-175.
DOI：

SUN Muzi, MA Wenzhong, WANG Yusheng, et al. 基于重复控制的MMC交直流阻抗建模与稳定性分析[J]. Power System Protection and Control, 2025, 45(2): 163-175. DOI： 10.19783/j.cnki.pspc.240550.

摘要

目前针对模块化多电平换流器(modular multilevel converter

MMC)系统的稳定性研究主要围绕在传统的双闭环控制，如何拓展到其他控制成为了难点。针对此问题，首先，基于多谐波线性化法提出了一种采用嵌入式重复控制器的MMC系统精确阻抗计算方法，建立了MMC的交直流侧阻抗模型，实现了嵌入式重复控制器交直流阻抗的准确计算。其次，分析了控制参数对MMC交直流侧阻抗特性的影响，研究得出嵌入式重复控制器的比例系数、内膜系数、增益系数及其他环节参数等因素对系统稳定性的影响。进而解析各参数对系统稳定的影响趋势和程度，为并网MMC系统嵌入式重复控制的参数设计提供了指导。最后，对比了接入不同强度电网时的系统稳定性。仿真结果验证了嵌入式重复控制系统在弱电网下的可行性，保障了MMC的稳定运行。

Abstract

At present

stability research of modular multilevel converter (MMC) system mainly focuses on the traditional double closed-loop control

and extending this to other controls has become a challenge. To address this problem

firstly

an accurate impedance calculation method for MMC systems using embedded repetitive controller is proposed based on the multi-harmonic linearization method. The AC/DC side impedance model of the MMC is established

and accurate calculation of the AC/DC impedance of the embedded repetitive controller is achieved. Secondly

the influence of control parameters on the AC/DC side impedance characteristics of the MMC is analyzed. The effects of the proportional gain

internal mode filter

the gain of the embedded repetitive controller and other parameters on the stability of the system are obtained. Furthermore

the trends and extent of these parameters’ impact on system stability are analyzed

providing guidance for the parameter design of embedded repetitive control of grid-connected MMC systems. Finally

the stability of the system when connected to grids of different strengths is compared. Simulation results verify the feasibility of the embedded repetitive control system in weak grids

ensuring the stable operation of the MMC.

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