电测与仪表2017，Vol.54Issue(23)：1-9,9.
模块化多电平变换器最近电平调制研究
Research on nearest level modulation for multilevel converter
摘要
Abstract
The overall performance of modular multilevel converter (MMC) is directly affected by the modulation method.And the nearest level modulation (NLM) has been widely used in high voltage and high power applications today,due to its lower switching losses and more convenience when implemented in MMC.In this paper,the voltage balancing method based on capacitor voltage sequencing is applied,and then,a small offset is added to the approximate function during the trigger pulse forming process.The function-rounding process is adjusted so that the time of step changing staggered and the harmonic distortions of output wave can be improved dramatically.Furthermore,the output voltage harmonic level of the combination of different modulation deviation is analyzed.The inventor model of MMC with 10 sub-modules is realized by MATLAB/Simulink.Simulation results show the effectiveness of the proposed method.关键词
模块化多电平/最近电平调制/电容电压排序/近似函数/输出电压谐波Key words
modular multilevel/nearest level modulation (NLM)/capacitor voltage ranking/approximate function/output voltage harmonics分类
信息技术与安全科学引用本文复制引用
张国荣,韩慧颖,王啸飞,陈祥..模块化多电平变换器最近电平调制研究[J].电测与仪表,2017,54(23):1-9,9.基金项目
国家高技术研究发展计划项目(863计划)(2015AA050104) （863计划）
广东省引进创新科研团队计划资助(2011N015) （2011N015）
