【摘要】 针对传统光伏电池最大功率点跟踪(MPPT)算法,即跟踪速度和精度之间存在的问题,提出了基于恒定电压法和变步长滞环比较法相结合的改进算法。该算法避免了扰动观察法容易出现的误判问题,抑制了最大功率点附近的振荡,提高了常规滞环比较法的稳态精度。利用Matlab/Simulink仿真平台,建立了基于该算法的MPPT仿真模型。试验结果验证了该算法的可行性,且显著提高了系统的跟踪速度、精度和光电转换效率。更多还原

【Abstract】 Aiming at the contradiction between the speed and precision of traditional photovoltaic MPPT algorithm,an algorithm based on constant voltage tracking method and variable step size hysteresis comparison method is proposed. It avoids the problem of false judgment which is easy to appear in the perturbation and observation method,and the oscillation in the vicinity of the maximum power point is suppressed,and the steady- state accuracy of the conventional hysteresis comparison method is improved. Based on Matlab / Simulink simulation platform,MPPT simulation model based on this algorithm is built. The experimental results verify the feasibility of the algorithm,and the tracking speed,accuracy of the system significantly and the photoelectric conversion efficiency have been improved.更多还原