中国电机工程学报2016，Vol.36Issue(7)：1892-1899,8.DOI:10.13334/j.0258-8013.pcsee.2016.07.016
模块化多电平变流器模块电压纹波抑制策略及应用
Strategy and Application of Reducing Capacitor Voltage Ripples in Modular Multilevel Converters
摘要
Abstract
System cost and operation life can be improved by reducing the capacitors ripples in modular multilevel converters (MMC). The reason of traditional circulating current suppression strategy to reduce the capacitor fluctuation was analyzed by numeric calculation. The instantaneous power fluctuations of submodules were expressed as capacitor voltages fluctuations. According to the relationship between the voltage fluctuations and the circulating currents, the optical circulating current to reduce the power fluctuations was calculated. Ripple suppression effects were analyzed by changing modulation ratio and power factor angle. Finally, the ripple suppression strategy was verified by utilizing Matlab simulation and RT-Lab hardware-in-the-loop platform. The effects by power factor angle were tested by simulations. The feasibility and application of carrier phase shifting modulation and nearest level modulation methods were discussed by simulations and experiments.关键词
模块化多电平变流器/电压纹波/电流瞬时值/调制策略Key words
modular multilevel converter (MMC)/capacitor voltage ripples/instantaneous current value/modulation algorithm分类
信息技术与安全科学引用本文复制引用
李金科,金新民,吴学智,张冀川,武文..模块化多电平变流器模块电压纹波抑制策略及应用[J].中国电机工程学报,2016,36(7):1892-1899,8.基金项目
国家能源应用技术研究及工程示范项目(NY20150302)。 Project Supported by Application Technology Research and Engineering Demonstration Program of National Energy (NY20150302) （NY20150302）
