Application of MMC with Embedded Energy Storage for Overvoltage Suppression and Fault Ride-through Improvement in Series LCCMMC Hybrid HVDC System

作     者：Xiaodong Li Zheng Xu Zheren Zhang Xiaodong Li;Zheng Xu;Zheren Zhang

作者机构：Department of Electrical EngineeringZhejiang UniversityHangzhou 310027China IEEE 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2023年第11卷第3期

页      面：1001-1013页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

主　　题：Line-commutated converter(LCC) modular multilevel converter(MMC) MMC-based embedded battery energy storage system(MMC-BESS) fault ride-through(FRT)capability overvoltage suppression 

摘      要：The series line-commutated converter(LCC)and modular multilevel converter(MMC)hybrid high-voltage direct current(HVDC)system provides a more economical and flexible alternative for ultra-HVDC(UHVDC)transmission,which is the so-called Baihetan-Jiangsu HVDC(BJ-HVDC)project of *** one LCC and two MMCs(1+2)operation mode,the sub-module(SM)capacitors suffer the most rigorous overvoltage induced by three-phase-to-ground fault at grid-side MMC and valve-side single-phase-to-ground fault in internal *** order to suppress such huge overvoltage,this paper demonstrates a novel alternative by employing the MMC-based embedded battery energy storage system(MMC-BESS).Firstly,the inducements of SM overvoltage are ***,coordinated with MMC-BESS,new fault ride-through(FRT)strategies are proposed to suppress the overvoltage and improve the FRT ***,several simulation scenarios are carried out on PSCAD/*** overvoltage suppression is verified against auxiliary device used in the BJ-HVDC project in a monopolar BJ-HVDC ***,the proposed FRT strategies are validated in the southern Jiangsu power grid of China based on the planning data in the summer of *** results show that the MMC-BESS and proposed FRT strategies could effectively suppress the overvoltage and improve the FRT capability.