Impedance Modeling of Modular Multilevel Converters by Harmonic Linearization

被引：5

作者：

Lyu, Jing ^{[1
]}

Chen, Qiang ^{[1
]}

Cai, Xu ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Wind Power Res Ctr, Sch Elect Informat & Elect Engn, Shanghai, Peoples R China

来源：

2016 IEEE 17TH WORKSHOP ON CONTROL AND MODELING FOR POWER ELECTRONICS (COMPEL) | 2016年

关键词：

modular multilevel converter (MMC); impedance; internal dynamics; resonance; harmonic linearization;

D O I：

10.1109/COMPEL.2016.7556719

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The impedance modeling of modular multilevel converters (MMCs) is the prerequisite for applying the impedance-based stability analysis method to MMC-based power electronic systems. MMC has complex internal dynamics, e.g., harmonic circulating currents and capacitor voltage ripples, which might have a significant impact on operation stability of the interconnect system based on MMC. The harmonic linearization method, which is able to capture the internal dynamic behaviors of an MMC, is used to develop the ac-side small-signal impedance models of the MMC in this paper. An inherent low-frequency resonance phenomenon in the ac-side impedance of the MMC is revealed. Furthermore, the influence of the closed-loop control on the ac-side impedance of the MMC is also examined. Finally, the analytical impedance models are validated by the measured results in the time domain simulation by MATLAB/Simulink.

引用

页数：6

共 11 条

[1] Low-frequency input impedance modeling of boost single-phase PFC converters [J].