三电平并网逆变器的直接功率模型预测控制

Direct Power Model Predictive Control of Three-level Grid Connected Inverter

此处提出了一种三电平并网逆变器的直接功率模型预测控制(DPMPC)方法。该方法通过构建逆变器复功率变化量的价值函数,实现三电平逆变器对输出视在功率指令的快速响应;为进一步提高输出功率的控制精度,该方法中采用了一种改进的离散电压矢量调制策略,根据基本电压矢量构建虚拟电压矢量,增加了电压矢量选择范围。最后,通过实验验证了所提方法对逆变器输出功率控制的有效性。

A direct power model predictive control(DPMPC)method for three-level grid connected inverter is presented.By constructing the value function of complex power variation,the fast response of three-level inverter to the output apparent power reference is realized.In order to further improve the control accuracy of the output power,an improved discrete voltage vector modulation strategy is adopted in this method.The virtual voltage vector is constructed by the basic voltage vector,and the voltage vector selection range is increased.Finally,the effectiveness of the proposed method for inverter output power control is verified by experiments.