摘要
光伏发电阵列是一种随机的非线性、多变量对象,平稳且高效地进行最优光能捕获(MPPT)是光伏并网前级控制系统的关键。文中以光伏阵列仿真模型为基础,以模型输出的PV曲线作为调节光伏阵列工作电压的依据,提出了最大功率点曲线拟合+PID的控制模型。仿真实验表明,该控制模型能够有效提高光伏阵列的效率,较好的解决了传统恒压法效率低、扰动法稳定性不足等问题。
Pbotovoltaic array is a kind of random nonlinear, multivariable objects. Stable and efficient optimal light energy capture （MPPT） is the key of photovohaic grid-connected front stage control system .A novel curve fitting ＋ PID control model method is proposed to track the maximum power point of PV system..Based on the mathematical model of PV system,this method tracks the maximum power point by regulating the output voltage on the output PV curve. The experimental results show that, the control model can improve the efficiency of photovoltaic power generation system effectively, solves the problem of low efficiency of traditional constant pressure method, and the stability problems of perturbation and observation method.
出处
《电子设计工程》
2013年第3期166-168,173,共4页
Electronic Design Engineering
关键词
光伏并网
最优光能捕获
曲线拟合
PID
photovoltaic grid-connected
optimal light energy capture
curve fitting
PID
