电力系统及其自动化学报2017，Vol.29Issue(12)：107-113,7.DOI:10.3969/j.issn.1003-8930.2017.12.016
模块化多电平换流器故障容错控制策略
Fault-tolerant Control Strategy for Modular Multilevel Converter
程莹 1杨浩 2单佳佳 2帅智康2
作者信息
- 1. 湖南省电力公司检修公司,长沙 410000
- 2. 湖南大学电气与信息工程学院,长沙 410082
- 折叠
摘要
Abstract
Considering the large amount of sub-modules(SMs)cascaded on the arms in the modular multilevel convert-er(MMC)based high voltage direct current(HVDC)transmission system,attention is paid to the operation reliability. In order to fully implement the functionalities of MMC,its fault-tolerant operation without redundant SMs is investigat-ed,and a new redundancy protection control strategy based on energy balance and nearest level modulation is proposed when the SMs on the arms are removed symmetrically and the system is in an asymmetric state.The proposed strategy ensures that the converter can operate safely and stably without interruption. Finally,a 21-level two-terminal MMC-HVDC system is built in PSCAD/EMTDC. Simulation results show that the proposed redundancy protection control strategy is valid and effective.关键词
模块化多电平换流器/冗余控制/子模块/能量均衡/可靠性Key words
modular multilevel converter(MMC)/redundancy control/sub-module(SM)/energy balance/reliability分类
信息技术与安全科学引用本文复制引用
程莹,杨浩,单佳佳,帅智康..模块化多电平换流器故障容错控制策略[J].电力系统及其自动化学报,2017,29(12):107-113,7.
