谭风雷,陈昊,张兆君,朱超,张建忠.基于模拟退火法优化的MMC二次环流计算方法[J].中南民族大学学报自然科学版,2019,38(1):100-106
基于模拟退火法优化的MMC二次环流计算方法
Calculation method of secondary circulation current for MMC based on simulated annealing optimization
  
DOI:10.12130/znmdzk.20190118
中文关键词: 模块化多电平换流器  二次环流  桥臂能量均衡控制  模拟退火法
英文关键词: modular multilevel converters  secondary circulation current  averaging control  simulated annealing
基金项目:国家自然科学基金资助项目(51577025)
作者单位
谭风雷1,陈昊1,张兆君1,朱超1,张建忠2 1 国网江苏省电力有限公司检修分公司江苏 南京 2111022 东南大学 电气工程学院南京 210096 
摘要点击次数: 261
全文下载次数: 147
中文摘要:
      提出了一种模块化多电平换流器(MMC)二次环流计算方法,从电容伏安特性和等效开关函数角度出发,将桥臂能量均衡控制环节简化成双比例调节器后,推导得到二次环流计算模型。分析了MMC的拓扑结构及其控制方法,在充分理解二次环流产生原因的基础上,详细给出了二次环流计算模型的推导过程。同时为了进一步提高计算精度,建立了二次环流修正模型,并采用基于最小二乘法优化的模拟退火法求解最优参数。分析该模型得到了二次环流与桥臂能量均衡控制环节KV1、KI1有关,且随KV1的增加而增加,随KI1的增加而减少的重要结论,为减少二次环流提供了理论依据。最后PSCAD仿真结果表明该方法可以较为准确地计算二次环流,从而验证了该方法的有效性和可行性。
英文摘要:
      A method for calculating secondary circulation current of modular multilevel converters is proposed, which establishes a calculation method of secondary circulation current by simplifying averaging control to be double proportional regulator, based on capacitance volt-ampere characteristic and equivalent switching function. The topological structure of MMC and its control method are analyzed, and the specific process of the above model is displayed based on understanding the reason of producing secondary circulation current. In order to improve calculation accuracy, correction model of secondary circulation current is established, and the optimal parameters are obtained by using simulated annealing based on least squares. An important conclusion that secondary circulation current is associated with KV1, KI1, and it increase with the increase of KV1 and decrease with the increase of KI1, is obtained by analyzing the above model, which provides a theoretical basis for reducing secondary circulation current. Finally PSCAD simulative results show that the method can accurately calculate secondary circulation current, which verifies its validity and feasibility.
查看全文   查看/发表评论  下载PDF阅读器
关闭