Model Predictive Control of LCL Three-level Photovoltaic Grid-connected Inverter

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Liang, Cheng^1,2 ; Tian, Engang^1,2 ; Pang, Baobing^1,2 ; Li, Juan^1,2 ; Yang, Yang^1,2

School of Electrical and Automation Engineering, Nanjing Normal University, China^1

Nanjing, Jiangsu Province

210042, China^2

关键词: Co-ordinate system;    Matlab/Simulink software;    Method of modeling;    Midpoint potentials;    Neutral-point clamped three-level inverter;    Photovoltaic grids;    Three-level inverters;    Weight coefficients;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/4/042023/pdf
DOI  :  10.1088/1755-1315/153/4/042023

来源: IOP

【 摘 要 】

In this paper, neutral point clamped three-level inverter circuit is analyzed to establish a mathematical model of the three-level inverter in the β coordinate system. The causes and harms of the midpoint potential imbalance problem are described. The paper use the method of model predictive control to control the entire inverter circuit[1]. The simulation model of the inverter system is built in Matlab/Simulink software. It is convenient to control the grid-connected current, suppress the unbalance of the midpoint potential and reduce the switching frequency by changing the weight coefficient in the cost function. The superiority of the model predictive control in the control method of the inverter system is verified.