中文摘要：

为了提高太阳能发电效率，提出了一种新的太阳能最大功率跟踪方法。该改进算法由扰动观察法和二次插值法相结合进行最大功率点跟踪，利用二次插值法可以缩小搜索范围的特点，克服了扰动观察法在最大功率点附近产生的震荡现象，从而减小误判。通过MATLAB建模仿真的结果表明，改进算法能够快速地搜索到最大功率点，提高太阳能发电系统的稳定性。

英文摘要：

In order to improve the efficiency of solar power systems, an improved maximum power point tracking method for PV systems is proposed. The maximum power point （ MPP） is tracked by perturbation and observation algorithms and quadratic interpolation method. Based on perturbation and observation algorithm as well as the quadratic interpolation method which is introduced to narrow the scope of MPP, the improved method could avoid shock phenomenon of perturbation and observation al-gorithms near the maximum power point. The improved system is simulated by Matlab,and the simula-tion results show the proposed method can search the maximum power point effectively and state the steady performance of the PV power systems.