摘要
针对目前缺乏对特定谐波消除脉宽调制求解算法的非线性求解法和线性求解法应用于同一种逆变器电平拓扑进行研究的问题,针对级联型多电平逆变器建立了基于同伦算法的非线性求解方程和基于Walsh函数的线性求解模型,在多种拓扑条件下对比了两种算法求得的开关角轨迹、求解上限及消谐效果,分析了多波段调制模式下各算法初始求解条件的设置,得出了同伦算法和Walsh函数的求解特点、优劣性及在不同控制条件下的适用性,并提出将2种算法应用于同一种逆变器电平拓扑时可减小求解工作量,提高控制灵活性。
For lack of research of nonlinear and linear solution algorithms of selected harmonics elimination pulse width modulation used in the same level topology of inverter,a nonlinear solution equation based on homotopy algorithm and a linear solution model based on Walsh function were established for a cascade multilevel inverter.Under several topology conditions,trajectory,upper limit and harmonic elimination effect of switching angles solved by the two algorithms were compared,and setting of initial solution conditions of the two algorithms were analyzed based on multi-band modulation mode.Solving characteristics,advantages,disadvantages and applicability under different control conditions of homotopy algorithm and Walsh function were summarized.It was pointed out that applying the two algorithms in the same level topology of inverter could reduce solution amount and improve control flexibility.
出处
《工矿自动化》
北大核心
2014年第10期41-47,共7页
Journal Of Mine Automation
基金
国家自然科学基金资助项目(51167006)
关键词
级联型多电平逆变器
特定谐波消除脉宽调制
多波段调制
同伦算法
WALSH函数
cascaded multi-level inverter
selected harmonics elimination pulse width modulation
multi-band modulation
Homotopy algorithm
Walsh function
