基于改进的扰动观察法在光伏发电MPPT中的应用  

Application in MPPT of photovoltaic power generation based on improved perturbation and observation method

作　　者：陈令军[1] 戴瑜兴[1,2] 全惠敏[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]温州大学物理与电子信息工程学院,浙江温州325035

出　　处：《电源技术》2016年第3期614-616,共3页Chinese Journal of Power Sources

摘　　要：光伏电池是一种非线性电源,随外界环境的变化而变化,为了提高光伏阵列的利用率,光伏系统中需采用最大功率跟踪(maximum power point tracking,MPPT)。近年的研究中,提出了许多跟踪算法,其中应用最为广泛的是扰动观察法和电导增量法。在分析扰动观察法的基础上,进行优化提出了一种改进的变步长算法,它有效提高了最大功率点跟踪过程中的跟踪速率,克服了扰动方向的误判问题,消除了在最大功率点的振荡现象。仿真与实验结果证明了该方法的有效性。PV cells was nonlinear and it was time-varying under changing solar irradiance and ambient temperature.Therefore the MPPT techniques should be invented in PV systems in order to maximize the output power of PV systems. In recent years, there were a lot of MPPT methods reported in the literatures, among them, the perturb and observe method and incremental conductance method were very commonly used in PV systems. Amodified algorithm with variable step size based upon the Perturb and Observe（PO） method was proposed. The utilization of PV panel with rapid and accurate MPPT track were improved. The oscillations around the MPP were eliminated. Both simulations and experimental results show its effectiveness.

关 键 词：光伏发电 最大功率功率跟踪 扰动观察法 光伏阵列 变步长 PID控制 

分 类 号：TM615[电气工程—电力系统及自动化]