光伏并网逆变器的非线性动力学研究

on-linear Dynamics Model and Chaotic Behavior of the Single-phase Full Bridge Photovoltaic Grid-connected Inverter

本文首先阐述了单相全桥光伏并网逆变器的电路模型及其工作原理,根据基尔霍夫定律及理想运算放大器的特性,建立了单相全桥光伏并网逆变器电路模型的6.5维分段光滑状态方程组,给出了详细的方程组推导过程。然后利用四阶龙格库塔法对所建立的状态方程组进行求解,对其非线性动力学性质进行了初步研究,发现在一定的光伏阵列输出电压范围内,系统会产生混沌行为。

In this paper,circuit the of single-phase full bridge photovoltaic （PV） grid-connected inverter model and its working principle are introduced. According to Kirchhoff＇s law and the characteristics of ideal operational amplifier ,a 6.5-dimensions piecewise smooth state equation for the circuit model of sin- gle-phase full bridge photovoltaic （PV） grid-connected inverter is set up,the derivation of the equations is presented in detail. Then using the fourth order Runge Kutta method to solve the established state e- quation ,the nonlinear dynamics properties of this modeling is investigated preliminarily. The research re- sults show that this circuit system can produce chaotic behavior under certain range of pv array output voltage.