中文摘要：

对全钒液流电池所特有的支路电流损耗进行理论分析和研究，建立支路电流等效电路模型，通过仿真计算对支路电流进行量化分析，并得出支路电流的分布规律及其对全钒液流电池外特性的影响。同时基于化学电池的经典三阶模型，通过引入受控元件的思想，提出包含支路电流损耗因素的全钒液流电池模型，并通过仿真对比分析发现，大规模全钒液流电池系统的支路电流损耗对电池系统外特性影响显著。尽可能地消减支路电流损耗，对于提高电池储能系统的效率和保障电池系统内部模块的电压一致性至关重要，尤其在电力系统领域大规模应用全钒液流储能电池时，支路电流的研究对于工程前期规划设计和系统运行的操作维护，均具有实际应用价值。

英文摘要：

Shunt current loss of vanadium redox flow battery （VRB） was researched and analyzed. The equivalent circuit of shunt current was modelling, and the value and distribution of shunt current were obtained by simulation; and then the shunt current influence on the external characteristics of VRB was analyzed. Based on the classic battery model and controlled unit, the VRB model including shunt current factor was established. From the simulation, the influence on battery system external characteristics became obvious with the large-scale application of VRB. To reduce the loss of shunt current can improve the efficiency of VRB and be useful to keep the consistency of voltage of battery internal modules. Study on shunt current of large scale VRB system has very practical significance, especially for project pre-planning and its operation and maintenance.