摘要
为了研究光伏电池最大功率点追踪算法,本文对光伏电池的输出特性进行了分析。以光伏阵列工作在稳定区域内的情况下,dP/dU与I存在线性关系为基础,本文提出了一种改进型扰动观察法的最大功率点追踪算法。该算法提出了一个新的判断光伏电池最大功率点的条件,结合扰动观察法和固定电压法寻找最大功率点。与传统的扰动观察法相比,该算法提高了系统的稳定性。对该算法进行了理论推导,并采用Matlab进行了仿真验证,结果表明,该算法能减少在最大功率点附近的振荡。
The paper analyses the voltage-current characteristic of PV cells to study maximum power point tracking algorithm. Based on near linearity of dP/dU versus I in stable working area of photovoltaic array, maximum power point tracking algorithm for photovoltaic cells is improved. The algorithm proposing new condition to confirm the maximum power point is combined with constant voltage method and perturb-observe method. The stability of system is improved in comparison with traditional perturbation and observation method. The algorithm is theoretically derived and simulated by Matlab. The results of simulation show that the algorithm can eliminate oscillation.
出处
《电气技术》
2012年第11期18-21,共4页
Electrical Engineering
关键词
光伏电池
最大功率点追踪
扰动观察法
仿真
photovoltaic cell
maximum power point tracking （MPPT）
perturbation and observation method
simulation
