To expand the use of wind energy, this paper proposed an off-grid ice storage system driven by distributed wind energy using ice storage to partly replace batteries with wind-electric-cold conversion. The current research aimed to achieve stable and efficient conversion of wind-electric-cold through control method. A system energy transfer model was established to study the energy utilizing efficiencies between the variable speed compressor direct drive mode and the battery floating charge mode under different wind conditions. An optimized variable step-size duty cycle maximum power point tracking (MPPT) algorithm based on the system impedance variation was proposed, then the average wind-electric conversion efficiency increased from 31.6% to 40.58%. Mode-switching control based on the parameters of the wind condition definition was designed to improve electric-cold conversion efficiency to 205.8% on the premise of reducing the battery charge and discharge loss by switching the battery on or off in advance. The superiority of the control method was verified by experiments, finally, the system energy efficiency ratio (EER) reached 0.59 in the case of continuous and stable operation under outdoor wind conditions.

为了扩大风能的利用，本文提出了一种离网式冰蓄冷系统，该系统由分布式风能驱动，利用冰蓄冷器来部分替换风冷电转换的电池。当前的研究旨在通过控制方法来实现风电-冷的稳定和有效的转换。建立了系统能量传递模型，研究了在不同风况下变速压缩机直接驱动模式和电池浮充模式之间的能量利用效率。提出了一种基于系统阻抗变化的优化变步长占空比最大功率点跟踪算法，平均风电转换效率从31.6％提高到40.58％。设计了基于风况定义参数的模式切换控制，旨在在通过预先打开或关闭电池来减少电池充放电损失的前提下，将电冷转换效率提高到205.8％。通过实验验证了该控制方法的优越性，最后，在室外风条件下连续稳定运行的情况下，系统能效比（EER）达到0.59。