Model Predictive Control for Three-Phase Grid-Connected Inverters Based on Power Feed-Forward Control

作者：Gao Fengyang^*; Du Qiang; Qiao Yao; Zhuang Shengxian

来源：Acta Energiae Solaris Sinica, 2017, 38(9): 2368-2376.

• Feed forward
• Grid-connected controls
• Matlab/Simulink simulation
• One-step predictions
• Stationary coordinates
• Three-phase grid connected inverters
• Total harmonic distortion (THD)
• TWo-step model

According to the characteristics of single-stage three-phase photovoltaic grid connected inverter, a two step model predictive control method is proposed to speed up the dynamic response speed and reduce the total harmonic distortion. In this method, the output power of the PV array is introduced into the traditional voltage outer loop as the reference value of the current inner loop. Two step predictive control is adapted to solve the problem of computing delay in one step prediction. The simulation model of the system is established by using the MATLAB/Simulink simulation software, and the results are compared with the one without power feed forward, one step prediction and the traditional PI control method. The simulation results showed that the model predictive control with power feed forward can accelerate the dynamic response of the system and quickly track the maximum power point of the PV array when the external conditions change. Compared with the traditional PI control, the total harmonic distortion of the current becomes smaller.

• 出版日期2017
• 单位西南交通大学