一种适用于Z源的滞环控制算法的研究

Research of a Kind of Hysteresis Control Algorithm Based on Z-source

基于Z拓扑的逆变系统,需在开关控制信号中加入直通信号。传统的滞环控制算法无法实现。针对这一局限,提出一种新的适用于Z拓扑的定频电流滞环控制策略。该策略保留了传统滞环控制的优点;采用定频控制,降低了系统损耗,便于滤波;有了Z源的升压作用,系统功率输出能力明显提高。通过MATLAB仿真,并经过实验验证,证明了该策略的可行性。

Z source based power inverter system,for Z topology,shoot through time must be added in the switch signals.Traditional hysteresis control algorithm can not be achieved.In response to this limitation,this paper presents a new kind of control algorithm based on fixed-frequency current hysteresis.The strategy retains the advantages of traditional hysteresis control.Because it is a fixed-frequency control,system loss was reduced,and it was easy to filter.With the boosting role of Z source,power output capability of system was improved significantly.By simulation with MATLAB and after experiments,the correctness of the stategy was proved.