Truncation number selection of harmonic state-space model based on the floquet characteristic exponent

J Zhu, Z Guo, J Hu, S Ma, J Guo - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Harmonic state-space (HSS) theory has been an effective method for studying system
stability with time-periodic characteristics, such as modular multilevel converters (MMCs) …

Revealing 150 Hz Oscillation of MMC-HVDC Based on High-Fidelity HSS Model

J Zhu, Y Hou, J Hu, Y Li, J Guo - IEEE Transactions on Industrial …, 2024 - ieeexplore.ieee.org
The instability of modular multilevel converter (MMC)-based high voltage direct-current
(HVDC) with oscillation frequency always at 150 Hz has been a critical issue. Due to the lack …

A simplified control parameter optimisation method of the hybrid modular multilevel converter in the medium‐voltage DC distribution network for improved stability …

J Xu, Q **ao, H Jia, Y Mu, Y **, W Lu… - IET Energy Systems …, 2024 - Wiley Online Library
To improve the stability of the hybrid modular multilevel converter (MMC), a simplified
dominant mode‐based control parameter optimisation method of the hybrid MMC system is …

Theoretical and simulation analysis of DC bus current fluctuation control strategies of modular multilevel converter under AC side fault conditions

S Qian, F Wang, H Huang, J Lin, Z Wang… - Systems Science & …, 2024 - Taylor & Francis
Modular Multilevel Converters (MMCs) play a crucial role in high-voltage DC (HVDC)
systems due to their adaptable control and swift response capabilities. However, AC side …

Small-signal stability of AC/DC capacity and MMC controller voltage loop dominated systems

E Bai, J Xu - Journal of Power Electronics, 2023 - Springer
The stability of an MMC AC/DC hybrid system shows differences with changes in its
operating state. However, the time domain analysis method cannot quantitatively evaluate …

不对称工况下模块化多电**换流器稳定性分析的矩阵降维

汪娟娟, 王泽昊, 刘岳坤, 冯俊杰, 傅闯 - 电力系统自动化, 2024 - epjournal.csee.org.cn
模块化多电**换流器(MMC) 在对称工况下的建模与稳定性分析已经得到了广泛关注.
实际工程中的MMC 会处于不对称运行工况, 如桥臂电感不对称, 交流侧电压不对称等 …

Research on small signal modeling of MMC-HVDC under asymmetric operating conditions

X Liang, Z Wang, J Yue, Z Zhang… - … Conference on AC and …, 2024 - ieeexplore.ieee.org
The modeling of modular multilevel converters (MMC) under symmetric conditions have
received widespread attention. In practical engineering, the modular multilevel converter …