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改进PSO算法应用于级联多电平逆变器谐波限制(英文) 被引量:1

Harmonic reduction for cascaded multilevel inverters using modified PSO
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摘要 为限制级联多电平逆变器输出电压谐波,提出一种改进粒子群优化(PSO)算法.在考虑三倍次谐波的情况下,给出最优化阶梯波法的目标函数.粒子群优化算法的惯性权重按负反正切规律变化,加速常数按反正切规律变化.通过提高算法前期全局探索能力和后期局部开发能力,算法搜索能力增强,而算法计算量几乎未增加.分析该方法的参数范围和粒子轨迹收敛速度,并将该方法应用于十一电平逆变器谐波限制问题,获得较佳的开关角设置方案,表明该方法具有优良的收敛性能。 To reduce the output voltage harmonic of cascaded multilevel inverters,a sort of modified Particle Swarm Optimization(PSO) algorithm is put forward.The objective function of staircase modulation is given while the triple harmonics are considered.The inertia weight changes with negative arc tangent function while the acceleration constants change with arc tangent function.The searching ability of the algorithm is improved with scarcely increased computational cost by improving the global exploration ability during the former period and the local exploitation ability during the latter period.The limitation of parameters and the convergence rate of particle trajectories are analyzed.This method is applied to the harmonic reduction problem of the 11-level inverter,and better setting of switching angles are obtained,which validates that this method possesses strong convergence capability.
出处 《上海海事大学学报》 北大核心 2012年第1期85-90,共6页 Journal of Shanghai Maritime University
基金 Shanghai Excellent Youth Scholars Foundation(ssc08022) Research and Innovation Project of Shanghai Municipal Education Commission(09YZ273) Innovation Action Plan Project of Science and Technology Commission of Shanghai Municilpality(09dz1202400)
关键词 粒子群优化 级联多电平逆变器 阶梯波法 particle swarm optimization cascaded multilevel inverter staircase modulation
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