【摘要】 分析了特大型城市电网的需求,指出统一潮流控制器(UPFC)是优化电网潮流分布、有效提高通道利用效率及电网稳定性的有效举措。特大型城市电网更需要功率密度高、结构紧凑的电力电子换流器设计。通过串联型换流器与模块化多电平换流器(MMC)在拓扑、谐波和损耗水平、工程应用中的数据对比说明,前者结构更为紧凑,后者在谐波及损耗上占有优势。因此,开展MMC的紧凑化设计,以及串联型换流器的谐波和损耗工程实用化研究,符合特大型城市电网的建设需求。更多还原

【Abstract】 The demand of mega urban power grid is analyzed.lt is pointed out that unified power flow controller(UPFC) is an effective measure to optimize power flow distribution and improve the efficiency of channel utilization and the stability of power grid.Moreover, the design of power electronic converters with high power density and compact structure is needed for mega urban power grids.By comparing the data of series converter and modular multilevel converter(MMC) in topology, harmonic, loss level and engineering application, it is shown that the former is more compact in structure and the latter has advantages in harmonic and loss.Therefore,the compact design of MMC and the practical research of harmonic and loss engineering of series converter meet the construction needs of mega urban power grid.更多还原