基于dsPIC的限频式滞环控制单相并网逆变系统设计

Design of Single-Phase Grid-connected Inverter Used Limited-frequency Hysteresis Control Based on dsPIC

通过分析单相电压型并网逆变器的拓扑结构和原理,给出系统双闭环控制方案,并采用了一种限频式滞环电流控制方法,解决了传统滞环控制开关频率不固定的问题。利用高性能微控制器dsPIC2010搭建了原理样机,实验结果表明系统具有良好的稳态与动态性能,验证了方案的可行性。

A dual-loop SPWM control method is used in single-phase voltage inverter by analyzing its topology and principle, and a limited-frequency hysteresis current control method is introduced to the grid-connected system to solve the problem that the frequency varies too fast that the traditional hysteresis current control method causes. A prototype is designed using digital Signal controller dsPIC30F2010 and the experimental results show the grid-connected system has both excellent steady-state behavior and dynamic performance.