电力系统自动化2016，Vol.40Issue(6)：78-84,7.DOI:10.7500/AEPS20150623012
基于模块化多电平换流器的新型全桥损耗优化调制策略
A New Full-bridge Loss Optimization Modulating Strategy Based on Modular Multilevel Converter
摘要
Abstract
A new full-bridge loss optimization modulating strategy is proposed.The strategy is able to balance the thermal stress of each semiconductor in a sub-module and improve the device safety margin,so as to enhance the power transfer capability of the modular multilevel converter(MMC).To begin with,the topology of the sub-module of MMC is analyzed. Proceeding from the perspective of suppressing the DC fault current,a full-bridge sub-module is chosen as the object for analysis.Secondly,for various working conditions of the MMC-HVDC transmission system,the loss and the junction temperature are analyzed to identify the main factor limiting the MMC power transfer.Finally,based on a comprehensive analysis,the full-bridge loss optimization modulation strategy is proposed for the MMC-HVDC transmission system,which can improve the transmission power.Simulation analysis has verified the validity of the strategy.关键词
模块化多电平换流器/导通损耗/开关损耗/结温/损耗优化/调制策略Key words
modular multilevel converter (MMC)/conduction losses/switching losses/junction temperature/loss optimization/modulating strategy引用本文复制引用
谢晔源,曹冬明,姜田贵,朱铭炼,李建春..基于模块化多电平换流器的新型全桥损耗优化调制策略[J].电力系统自动化,2016,40(6):78-84,7.基金项目
国家电网公司科技项目“500 kV/3000 MW 高压大容量模块化电压源型换流器关键技术研究及样机研制”。This work is supported by State Grid Corporation of China （）
