Compared with conventional inverters,quasi-Z-source inverters have a simple structure and outstanding advan-tages.They can achieve voltage boost and reduction functions via a single-stage structure and are widely used in various fields.Due to the nonlinearity of its components,its control performance nevertheless depends on the establishment of ac-curate mathematical models and the configuration of compensation loops.This paper analyzes the working principle of Z-source inverter,establishes its small signal mathematical model,derives the transfer function of state variables,and fur-ther designs the control loop using zero pole configuration compensation.The established quasi-Z-source inverter mathe-matical model has been verified by simulative analysis to be accurate,while with respect to the designed control loop,ade-quate to impart good stability and anti-interference ability to the system.
关键词
准Z源逆变器/小信号数学模型/零极点配置补偿
Key words
quasi-Z-source inverter/small signal mathematical model/zero pole configuration compensation
维普
万方数据