Study on nonlinear dynamic behavior and stable operation region of single-phase photovoltaic inverter

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Li, Peng^1 ; Jiang, Pinqun^1 ; Liao, Zhixian^1 ; Fan, Rui^1

College of Electronic Engineering, Guangxi Normal University, Guilin

541004, China^1

关键词: Bifurcation and chaos;    Bifurcation diagram;    Frequency domains;    Nonlinear behavior;    Nonlinear dynamic behaviors;    Photovoltaic inverters;    Proportional control;    Time-domain waveforms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/5/052033/pdf
DOI  :  10.1088/1757-899X/439/5/052033

来源: IOP

【 摘 要 】

In order to design a photovoltaic inverter with excellent performance, the second-order photovoltaic inverter circuit model under current loop proportional control is established in this paper, the discrete iterative model of system is also obtained. The nonlinear behavior of system is analysed in detail through bifurcation diagram, folding diagram and the phase diagram of output current (i) and output voltage (u c). The simulation model is constructed in Matlab/Simulink, and the correctness of theoretical analysis is verified through time domain waveform and phase-space map. The influence of bifurcation and chaos on system spectrum is analysed from the frequency domain. According to the Jacobian matrix of system, the stable operation region of system is given. The experiment shows that the correct selection of circuit parameters is important for the stable operation of system.