Modeling, numerical simulation, and nonlinear dynamic behavior analysis of PV microgrid-connected inverter with capacitance catastrophe

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Li, Sichen^1 ; Liao, Zhixian^1 ; Luo, Xiaoshu^1 ; Wei, Duqu^1 ; Jiang, Pinqun^1 ; Jiang, Qinghong^1

College of Electronic Engineering, Guangxi Normal University, Guilin

541004, China^1

关键词: Kirchhoff's laws;    Load capacitance;    Nonlinear dynamic behaviors;    Photovoltaic inverters;    Piecewise linear;    Simulation model;    State equations;    Working state;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/4/042007/pdf
DOI  :  10.1088/1755-1315/121/4/042007

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The value of the output capacitance (C) should be carefully considered when designing a photovoltaic (PV) inverter since it can cause distortion in the working state of the circuit, and the circuit produces nonlinear dynamic behavior. According to Kirchhoff's laws and the characteristics of an ideal operational amplifier for a strict piecewise linear state equation, a circuit simulation model is constructed to study the system parameters (time, C) for the current passing through an inductor with an inductance of L and the voltage across the capacitor with a capacitance of C. The developed simulation model uses Runge-Kutta methods to solve the state equations. This study focuses on predicting the fault of the circuit from the two aspects of the harmonic distortion and simulation results. Moreover, the presented model is also used to research the working state of the system in the case of a load capacitance catastrophe. The nonlinear dynamic behaviors in the inverter are simulated and verified.