单相并网逆变器的三态滞环控制策略

以单相电压型并网逆变器为研究对象，提出一种新型的三态滞环控制策略。该方法是在传统的两态滞环控制的基础上，增加过零比较器，通过优化逆变器的开关逻辑，从而实现滞环控制下并网逆变器的三态输出。该三态滞环控制方式结构简单，易于实现，相对于传统的两态滞环控制具有倍频控制的效果，能在相对较低的开关频率下获得较快的动态响应，输出电能质量良好，且全桥电路中只有两个开关工作于高频状态，有利于降低功率管开关损耗，提高并网系统运行效率。

The Three-Level Hysteresis Control Strategy for Single Phase Grid-connected Inverter

A novel three-state hysteresis control strategy for the single-phase voltage inverter is proposed.Through adding a zero-crossing comparator and optimizing the inverter switching logic,this method which is based on the traditional two-state hysteresis control can achieve three-state outputs.The control structure of this method is simple and easy to implement,and three-level hysteresis control has the function of frequency-doubling at the same conditions of current hysteresis width and output current.So the f...