引用本文:申 科,王建赜,班明飞,纪延超,蔡兴国.基于粒子群优化的模块化多电平变换器阶梯波调制策略[J].电力自动化设备,2014,34(4):
SHEN Ke,WANG Jianze,BAN Mingfei,JI Yanchao,CAI Xingguo.Staircase modulation scheme based on PSO for modular multilevel converter[J].Electric Power Automation Equipment,2014,34(4):
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基于粒子群优化的模块化多电平变换器阶梯波调制策略
申 科, 王建赜, 班明飞, 纪延超, 蔡兴国
哈尔滨工业大学 电气工程及自动化学院,黑龙江 哈尔滨 150001
摘要:
选取合适的开关角迭代初值是模块化多电平变换器(MMC)阶梯波调制方法实现的关键。为此提出一种基于粒子群优化(PSO)算法的阶梯波调制策略。该策略采用PSO算法得到优化的开关角初值,再运用牛顿迭代法快速计算出开关角的精确解。所提出的方法辅以电容电压排序平衡策略可以有效地解决子模块电容电压均衡问题,具有低复杂度和开关频率的优点。以三相五电平MMC系统为例,搭建了低压物理模型的验证平台。仿真和实验结果证明了所提方法的正确性和可行性。
关键词:  可再生能源  模块化多电平变换器  阶梯波调制  电容电压均衡  粒子群优化  牛顿迭代法
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Staircase modulation scheme based on PSO for modular multilevel converter
SHEN Ke, WANG Jianze, BAN Mingfei, JI Yanchao, CAI Xingguo
School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China
Abstract:
The selection of appropriate iterative initial switching angles is the essential step of staircase modulation for MMC(Modular Multilevel Converter) and a staircase modulation scheme is proposed,which applies the PSO(Particle Swarm Optimization) algorithm to achieve the optimized initial switching angles and the Newton iteration method to calculate the exact switching angles. Combined with the sorting balance strategy,it effectively balances the sub-module capacitor voltage with low complexity and switching frequency. As an example,a low-voltage verification platform is developed for a physical model of three-phase five-level MMC system. Simulative and experimental results demonstrate the correctness and feasibility of the proposed scheme.
Key words:  renewable energy  modular multilevel converter  staircase modulation  capacitor voltage balancing  particle swarm optimization  Newton iteration method

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