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首页> 外文期刊>Electric power systems research >A rapid cell voltage balancing scheme for supercapacitor based energy storage systems for urban rail vehicles
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A rapid cell voltage balancing scheme for supercapacitor based energy storage systems for urban rail vehicles

机译：用于城市轨道车辆的基于超级电容器的储能系统的快速电池电压平衡方案

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摘要

Supercapacitors are widely used in energy storage systems (ESS) due to the merits including high power density, relatively long life cycle, and fast charging/discharging capability. Recently, it is becoming possible to use supercapacitor based ESS as the single energy source to power an urban rail vehicle. Cell voltage balancing control is necessary for the ESSs where supercapacitor cells are connected in series in order to have safe and reliable operations. A typical charging cycle of onboard supercapacitor stack is around 30 s. A high voltage balancing current is demanded in order to realize cell voltage balancing within the charging courses. In this paper, a new voltage balancing circuit, which is derived from an improved push pull converter and with high current capability, is proposed for supercapacitor based ESS applications. A voltage balancing algorithm based on predicted cell behaviors is proposed to shorten the cell balancing time and improve the cell balancing efficiency. Simulation and experimental results are provided to verify the effectiveness and advantages of the proposed cell voltage balancing system. (C) 2016 Elsevier B.V. All rights reserved.
机译：超级电容器由于其优点包括高功率密度，相对较长的生命周期以及快速的充电/放电能力而被广泛用于能量存储系统（ESS）。近来，使用基于超级电容器的ESS作为为城市轨道车辆提供动力的单一能源成为可能。对于串联连接超级电容器电池的ESS，必须进行电池电压平衡控制，以确保安全可靠的运行。车载超级电容器堆栈的典型充电周期约为30 s。为了在充电过程中实现电池电压平衡，需要高电压平衡电流。本文针对基于超级电容器的ESS应用，提出了一种新的电压平衡电路，该电路来自改进的推挽转换器，具有高电流能力。提出了一种基于预测电池行为的电压平衡算法，以缩短电池平衡时间，提高电池平衡效率。提供仿真和实验结果，以验证所提出的电池电压平衡系统的有效性和优势。 （C）2016 Elsevier B.V.保留所有权利。

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