电力系统自动化Issue(20)：109-115,7.DOI:10.7500/AEPS20141216012
基于载波移相调制的模块化多电平换流器冗余保护策略
Redundant Protection Strategy Based on CPS-SPWM for Modular Multilevel Converter
摘要
Abstract
The existence of redundant sub-modules (SMs) is an important guarantee of reliability of modular multilevel converters (MMCs) to avoid the risk of abnormal operation and even outage.A novel redundant protection strategy based on carrier phase-shifted sinusoidal pulse width modulation(CPS-SPWM) is proposed,which includes carrier dynamic allocation, additional carrier control and optimization of capacitor voltage.The carrier dynamic allocation rearranges the carriers of SMs without additional records.The additional carrier control adjusts the state of the redundant SMs to retain their priority to be charged.The optimization of capacitor voltage is capable of maintaining slight fluctuation of the capacitor voltage as well as reducing the circulating current.Simulation results of a 7-level and a 101-level MMC system by PSCAD/EMTDC show that the proposed strategy is effective and generic for various voltage-level MMC systems to ensure successful converter operation when a SM fault occurs.关键词
模块化多电平换流器/子模块故障/载波移相调制/冗余保护Key words
modular multilevel converter/sub-module fault/carrier-phase-shifted sinusoidal pulse width modulation (CPS-SPWM)/redundant protection引用本文复制引用
林周宏,刘崇茹,林雪华,郭琦..基于载波移相调制的模块化多电平换流器冗余保护策略[J].电力系统自动化,2015,(20):109-115,7.基金项目
国家自然科学基金资助项目(51277068) （51277068）
教育部新世纪优秀人才支持计划(NCET-12-0846) （NCET-12-0846）
高等学校学科创新引智计划(“111”计划)(B08013)。This work is supported by National Natural Science Foundation of China (No.51277068),Program for New Century Excellent Talents in Universities (No.NCET-12-0846) and Program of Introducing Talents of Discipline to Universities (“111" Program)(No.B08013) （“111”计划）
