中国电机工程学报Issue(12)：2980-2988,9.DOI:10.13334/j.0258-8013.pcsee.2015.12.008
采用质因子分解法与希尔排序算法的MMC电容均压策略
A Capacitor Voltage Balancing Strategy Adopting Prime Factorization Method and Shell Sorting Algorithm for Modular Multilevel Converter
摘要
Abstract
Equalization of sub-module voltage is the important guarantee for the normal operation of the modular multilevel converter (MMC). For the MMC based high voltage direct current (MMC-HVDC) with large amount of submodules per arm, it is of great significance to cut down the complexity of sorting process for the reduction of the design of controllers and hardware requirement of MMC-HVDC projects. An optimized mixed sorting method was presented based on the prime factorization method, the sort number was substantially reduced owing to the introduction of Shell sorting algorithm. Thus the sort time and the requirement for the hardware of the system are reduced. Time complexity of the Shell algorithm applied to the MMC-HVDC was deduced and the calculation formula was proposed for the sort number of the mixed sorting algorithm. Impacts on the reduction of the frequency by the grouping layers were analyzed. Conclusion that the optimizing efficiency of the mixed sorting method is in inversely-proportional relationship with the grouping layers is acquired. Finally, simulation was carried out based on the 401-level two-terminal MMC-HVDC system in PSCAD/EMTDC. The efficiency and correctness of the mixed sorting method and the impact of the grouping layers on the optimizing efficiency are proved.关键词
模块化多电平换流器/电容电压均衡/质因子分解法/混合排序法/优化效率Key words
modular multilevel converter/equalization of sub-module voltage/prime factorization method/mixed sorting method/optimizing efficiency分类
信息技术与安全科学引用本文复制引用
何智鹏,许建中,苑宾,赵成勇,彭茂兰..采用质因子分解法与希尔排序算法的MMC电容均压策略[J].中国电机工程学报,2015,(12):2980-2988,9.基金项目
国家自然科学基金项目(51177042)；国家863高技术研究发展计划项目(2013AA050105)。Project Supported by National Natural Science Foundation of China (51177042) （51177042）
The National High Technology Research and Development of China 863 Program (2013AA050105) （2013AA050105）
