电力系统自动化Issue(5)：96-102,7.DOI:10.7500/AEPS201210276
基于零序电压注入的模块化多电平变流器故障容错控制
Fault-tolerant Control for Modular Multilevel Converter Based on Zero-sequence Voltage Injection
摘要
Abstract
As mounting numbers of modular multilevel converters (MMCs) are increasingly applied in the field of high-voltage large-power energy conversion,the loss brought about by MMC failures will be significantly increased.To resolve this problem,a fault-tolerant control strategy for MMC in three-phase three-wire system configuration is proposed.The capacitor voltage redundant sorting method is adopted to overcome the inherent unbalanced power distribution of the phase disposition PWM.The zero-sequence voltage inj ection method is presented on the basis of elaboration of different fault-tolerant control schemes,to ensure the line voltage will remain constant.Then the modulation signals are reconfigured for the case in excess of the threshold voltage range,which enables the MMC system to possess a reliable fault ride-through capability.Finally,a three-phase 4.5 kVA MMC prototype is built for experimental validation.The experimental results have verified the correctness and feasibility of the scheme proposed.关键词
模块化多电平变流器/电压平衡/容错控制/零序电压注入Key words
modular multilevel converter/voltage balancing/fault-tolerant control/zero-sequence voltage inj ection引用本文复制引用
申科,王建赜,班明飞,纪延超,蔡兴国..基于零序电压注入的模块化多电平变流器故障容错控制[J].电力系统自动化,2014,(5):96-102,7.基金项目
科技部国际科技合作计划资助项目(2010DFR70600)。This work is supported by International Science & Technology Cooperation Program of China(No.2010DFR70600) （2010DFR70600）
