Open AccessTime/frequency domain modelling for grid‐connected MMC sub‐synchronous/super‐synchronous oscillation in PV MVDC power collection and integration system
Author(s) -
Wang Jianhua,
Gao Shang,
Ji Zhendong,
Sun Yichao,
Hong Lucheng,
Luo Fangfang,
Gu Wei
Publication year - 2019
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2018.5041
Subject(s) - time domain , frequency domain , grid , oscillation (cell signaling) , electric power system , synchronous motor , power (physics) , computer science , permanent magnet synchronous generator , electrical engineering , electronic engineering , physics , engineering , voltage , mathematics , chemistry , geometry , quantum mechanics , computer vision , biochemistry
This study proposes a comprehensive PWM‐based modular multilevel converter (MMC) model in both time and frequency domain at the same time. The time‐domain model not only accelerates simulation speed but also describe the characteristics of sub‐modules, such as the dynamic voltage‐balancing process of sub‐module capacitors. The frequency‐domain model provides the output impedance of the grid‐connected MMC inverter in positive‐sequence and negative‐sequence coordinates. The proposed model, validated by results of different scenarios listed, at last, predicts and eliminates sub‐synchronous/super‐synchronous oscillations with impedance shaping method.