中文摘要：

当外界光照强度或温度突变时，常用的最大功率点跟踪算法无法跟踪到光伏模块的全局最大功率点。通过增加dV_PV／dI_PV和dP_PV／dV_PV判据，确定外界环境状态，提出了一种改进型电导增量最大功率点跟踪控制方法。该方法既具有传统电导增量控制方法的优点：外界环境稳定时，减小了最大功率点附近的振荡，比干扰观测法更加精确；同时在外界环境突变时能很快无振荡地跟踪到光伏模块的最大功率点。仿真结果证明了此控制算法的高适应性、鲁棒性，并建立实验让学生通过实践验证方法的有效性。

英文摘要：

When rapidly changing irradiation is on the photovoltaic panels, the traditional maximum power point tracking （MPPT） control algorithm could not effectively track the maximum power point （MPP） on pan- els. In this paper, through adding the criterions of dV_PV/dI_PV and dP_PV/dV_PV, an improved Incremental Con- ductance （IncCond） MPPT control algorithm is proposed. This method has the advantages of traditional Inc- Cond MPPT, which eliminates the oscillation around the MPP and is more accurate than the perturbation and observation algorithm, and can track the voltage of maximum power point in variable environment without any oscillation. Simulation and experiment results verify the high adaptability, robustness and effectivity of the pro- posed MPPT method. And experiment is set to help students understand MPPT method in practical.