@article{Wu2025, 
author = {Wencong Wu and Minzhi Wang and Liang Tu and Haiqing Cai and Guanglei Yan and Xiaohui Qu and Haohan Gu and Wei Chen},
title = {Control, Modeling and Stability Analysis of DRU-based Grid-forming Converter},
year = {2025},
journal = {Chinese Journal of Electrical Engineering},
volume = {11},
number = {1},
pages = {83-92},
keywords = {Diode rectifier unit, offshore wind-power generation, grid-forming converter, impedance model, stability analysis},
url = {https://www.sciopen.com/article/10.23919/CJEE.2025.000100},
doi = {10.23919/CJEE.2025.000100},
abstract = {Diode rectifier unit (DRU)-based high-voltage direct current (HVDC) transmission systems are effective in achieving the stable and economical operation of offshore wind-power generation. Considering the uncontrollable characteristics of DRUs, a grid-forming (GFM) strategy for wind-turbine converters is necessary to support offshore AC voltage and frequency. However, the active power-synchronization control in traditional GFM converters is unsuitable for DRU-based GFM converters. Thus, the stability issue for DRU-based HVDC systems involving DRU-based GFM and grid-following (GFL) converters has not yet been addressed. To solve these issues, this study begins with the characteristics of a DRU-based HVDC system and presents a control scheme for DRU-based GFM converters for power synchronization. Subsequently, the dq-frame impedance model of the DRU-based GFM converter is proposed for the stability analysis of the entire HVDC system. Finally, a simulation platform is built to verify the model accuracy and system stability.}
}