中文摘要：

基于光伏电池组件的电压/功率曲线特性，提出了一种能快速实现光伏电池组件MPPT的改进干扰观测方法。在考虑电网对光伏发电系统功率输出增长速率的条件下，该方法针对光伏电池组件开路电压与最大功率点电压比相对稳定的特性，在Uoc到85%Uoc之间设置大步长实现了光伏发电系统的MPPT快速粗跟踪，再在80%Uoc到85%Uoc之间减小步长实现了MPPT动态精确跟踪。此方法克服了干扰观测法跟踪速度和跟踪精度的矛盾。通过PSCAD仿真模型验证了该方法的有效性。

英文摘要：

Based on the characteristics of the voltage and power of photovoltaic cells,an improved perturbation and observation method which achieves the maximum power point quickly is investigated in this paper. This method completes the rough maximum power point tracking（MPPT）by pre-setting the tracking steps from Uoc to 85%Uoc and dynamic tracking by reducing the step size from 80%Uoc to 85%Uoc. Compared with the traditional methods,simulation results show that this new method reaches the maximum power point in a shorter time with a more accurate maximum power and can overcome the contradiction between the speed and precision in MPPT.