DC Voltage Control with Grid-forming Capability for Enhancing Stability of HVDC System  

作　　者：Ghazala Shafique Johan Boukhenfouf François Gruson Frédéric Colas Xavier Guillaud 

机构地区：[1]Ecole Centrale de Lille,Laboratory of Electrical Engineering and Power Electronic(L2EP),Lille,France [2]Arts et Métiers Institute of Technology,Laboratory of Electrical Engineering and Power Electronic(L2EP),Lille,France

出　　处：《Journal of Modern Power Systems and Clean Energy》2025年第1期66-78,共13页现代电力系统与清洁能源学报(英文)

基　　金：developed during the DICIT project sponsored by a public grant overseen by the French National Research Agency(No.ANR-20-CE05-0034 DICIT)。

摘　　要：Grid-forming(GFM)converters are recognized for their stabilizing effects in renewable energy systems.Integrating GFM converters into high-voltage direct current(HVDC)systems requires DC voltage control.However,there can be a conflict between GFM converter and DC voltage control when they are used in combination.This paper presents a rigorous control design for a GFM converter that connects the DC-link voltage to the power angle of the converter,thereby integrating DC voltage control with GFM capability.The proposed control is validated through small-signal and transient-stability analyses on a modular multilevel converter(MMC)-based HVDC system with a point-to-point(P2P)GFM-GFM configuration.The results demonstrate that employing a GFM-GFM configuration with the proposed control enhances the stability of the AC system to which it is connected.The system exhibits low sensitivity to grid strength and can sustain islanding conditions.The high stability limit of the system with varying grid strength using the proposed control is validated using a system with four voltage source converters.

关 键 词：DC voltage control grid-forming(GFM)converter high-voltage direct current(HVDC) modular multilevel converter(MMC) stability analysis 

分 类 号：TM721.1[电气工程—电力系统及自动化]