全钒液流电池储能系统中能量消耗研究

Study on energy consumption in all vanadium redox flow battery energy storage system

提出了全钒液流电池储能系统中能量损耗分布的计算方法,并研究了温度和流量对储能系统性能的影响。分析了系统效率以及储能变流器、交流泵与控制系统消耗的能量占比。结果显示,温度升高时,系统效率不断提高,在37℃时,系统效率达到60.06%,泵消耗能量6.11%,电堆消耗能量19.64%,储能变流器消耗能量13.73%;流量增加后,系统充电能量不断提升,在流量为120 L/min时,充电能量达到44.95 kWh,但系统效率下降至57.77%,泵消耗能量8.96%,电堆消耗能量18.94%,储能变流器消耗能量13.88%。

A calculation method was proposed to analyze the energy loss distribution in the all vanadium redox flow battery(VRFBSS)energy storage system.Different temperatures and flow rate were studied in the energy storage system,and the proportion of energy consumed by power conversion system(PCS),AC pump and control system and system efficiency was analyzed.The results show that the system efficiency improves continuously when the temperature rises.At 37℃,the system efficiency reaches 60.06%,the energy consumption of pump is 6.11%,the energy consumption of stack is 19.64%,and the energy consumption of PCS is 13.73%.When the flow rate is 120 L/min,the charging energy reaches 44.95 kwh,but the system efficiency drops to 57.77%,the energy consumption of pump is 8.96%,the energy consumption of stack is 18.94%,and the energy consumption of PCS is 13.88%.