分布式离网风电制冷储能系统的实验研究

Experimental Investigation on the Cold-storage System Driven by Distributed Off-grid Wind Power

为了实现分布式离网风电系统的高效制冷储能,构建了分布式离网风电制冷储能系统,并基于室外自然风况,开展了先蓄电后制冷与边蓄电边制冷两种运行模式下的风电制冷储能对比实验.结果表明,当系统采用边蓄电边制冷的模式运行时,可有效降低负载等效阻抗并减少蓄电池充放电损失,在实验风况条件下有效风能利用率为27.5%,蓄电池充放电效率为93.4%,风-冷转换的系统效率为60.7%,均高于先蓄电后制冷模式.

To achieve high-efficiency refrigeration and cold storage of the distributed off-grid wind power system,a cold-storage system drive by distributed off-grid wind power was constructed.Based on the outdoor natural wind conditions,comparative experiments were carried out for wind power refrigeration and cold storage under two operation modes.In operation mode 1,all wind power was charge into the battery firstly,then electric power was supplied to the compressor from the battery.Under working mode 2,wind power charged the battery and supplied for the compressor at the same time.The results showed that both the load equivalent impedance and the battery charge and discharge loss can be reduced when the system worked in operation mode 2.Furthermore,the effective utilization rate of wind energy was 27.5%,the charge and discharge efficiency of battery was 93.4%,the system efficiency of wind-cold conversion was 60.7%,these were higher than mode 1.