基于iCAN协议分布式超级电容监测系统

介绍了iCAN现场总线协议的特点,对基于iCAN分布式超级电容监测系统的硬件平台和软件流程作了说明。     

超级电容器储能装置研究

超级电容器可作为配电网电能质量调节装置的储能单元,提供必要的能量缓冲。详细分析了超级电容器储能装置的恒压双向功率流工作原理,建立了相应的系统模型,并根据超级电容器的特点,给出了超级电容器储能装置的设计方法,有效地规避了系统开环传递函数不稳定极点的出现。还采用统一控制器实现了储能、释能工作模态的平滑切换,实验结果证明了该控制策略的有效性和可行性。     

独立光伏系统中超级电容器蓄电池有源混合储能方案的研究

超级电容器与蓄电池混合使用,可以充分发挥蓄电池能量密度大和超级电容器功率密度大、循环寿命长的优点,大大提升储能系统的性能.针对独立光伏系统的特点,设计了一种有源式混合储能方案,建立了系统的模型和控制环节.实验结果表明,在光伏发电功率和负载功率脉动时,蓄电池能够工作在优化的充放电状态,并能够有效地减少充放电小循环次数.对解决光伏等可再生能源系统中的储能问题,具有现实可行性.     

Improved electrochemical performance of a cyclic ultracapacitor using slurry electrodes under various flow conditions

A cyclic ultracapacitor is a promising energy storage device that can be used for grid energy storage. The cyclic ultracapacitor combines the advantages of both ultracapacitors and flow batteries, enabling rapid charging and large‐scale energy use. To improve the electrochemical performance under the flow condition, it is necessary to find a more electrical active material and design a flow cell that minimizes the resistance. In this study, we investigate the effects of changing the ratio of the active material in a slurry electrode under various operating conditions. Slurry electrodes were prepared with different ratios of active material and conductive additive but with a fixed electrolyte amount. Voltage–time curves of both a single and a stack‐flow cell in the constant‐current mode were obtained to analyze the relationship between the active materials ratio and the cell performance. Having more adsorption sites according to the active material amount is more important than increasing the electric conductivity by the conductive additive amount with regard to cell performance capabilities in a low resistance condition such as a non‐flow mode. However, higher electrical conductivity on a slurry electrode is more beneficial to improve the electrochemical performance in the stack‐flow mode, which has harsh resistance levels. Copyright © 2017 John Wiley & Sons, Ltd.     

基于超级电容的车载电池管理系统设计

电池管理系统直接检测及管理电动车辆的储能电池运行的全过程,是电动车辆的重要组成部分。设计了一种基于超级电容电池的车载电池管理系统,通过测量超级电容电池的电压、温度和电流以及计算电池组的荷电状态(SOC),实现对超级电容电池组的监控和管理,对以超级电容电池作为动力源的电动车辆的电池管理方面具有很好的实际应用价值。     

基于带宽控制的有源式混合型脉冲电源设计

针对脉冲电源的功率补偿问题,提出了一种基于带宽控制的有源式超级电容器-蓄电池混合型脉冲电源。首先,给出了脉冲负载的定义,分析了其静动态特性;其次,建立了混合型脉冲电源的数学模型,介绍了其工作机理;进而,设计了一种基于Butterworth二阶低通滤波器带宽控制的有源式混合型脉冲电源;最后,在SIMULINK仿真环境下对所设计的脉冲电源进行理论验证,同时搭建实验平台进行实验验证。仿真和实验结果表明,所设计的脉冲电源充分满足了负载对能量和功率的双重需求,超级电容器对蓄电池功率补偿效果明显,在脉冲时刻承担了约1.7 A电流,优化了蓄电池的放电过程,使得蓄电池电流波动仅为0.5 A,电流曲线近乎平滑。     

超级电容器蓄电池混合电源性能研究

超级电容器蓄电池混合电源能充分发挥蓄电池比能量大和超级电容器能快速充放电、循环寿命长的优点,能显著提高电源的峰值输出功率。建立了超级电容器蓄电池混合电源的数学模型,系统地分析了影响超级电容器蓄电池混合电源峰值输出功率的因素,并通过实验对超级电容器蓄电池混合电源的峰值输出功率性能进行了验证。分析和实验结果表明:超级电容器蓄电池混合电源的峰值输出功率与脉动负载的占空比、脉动负载的周期、超级电容器的内阻、蓄电池的内阻、超级电容器的容量、超级电容器的并联支路数有着密切的关系。超级电容器蓄电池混合电源的峰值输出功率比蓄电池有了显著的提高。     

基于ADVISOR的混合动力复合电源二次开发

为满足对蓄电池-超级电容复合电源的性能仿真,通过分析蓄电池-超级电容并联工作原理,利用汽车仿真软件ADVISOR对复合电源进行二次开发。给出了复合电源二次开发的结构模型,并提出了模型内部各模块的开发方法。在并联混合动力汽车上对复合电源进行仿真分析。仿真结果表明:对复合电源的二次开发是可行的,且蓄电池-超级电容联合供电使得蓄电池峰值功率得到明显改善。     

基于压电材料的振动能量获取技术的研究

根据压电原理、力学理论及其电学等效模型,设计了能量收集电路,它由四倍压整流电路,3F超级电容器和微型电源管理芯片MAX1811组成。实验表明,电源管理芯片输出电压为4.17V时,PZT压电材料振动产生的电能,可通过该电路将电能储存于锂电池中。     

A Variable Current-Limit Control Scheme for a Bi-directional Converter used in Ultracapacitor Applications

In ultracapacitor applications, generally, a bi-directional converter is connected to a DC bus and is designed to compensate rapid load variations on the bus. During transient phases, overloaded DC bus can push the converter out of its operating limits. For providing the necessary power, converters should be put in parallel, while each converter is limited into its optimal operating range. In a boost converter, this operating limit can be related to the inductor current and UC voltage. In this study, a variable current-limit is proposed for inductor current which then determines the operating range of the boost converter. This method will provide stability of the converter during overload transients. An experimental setup consisting of a bi-directional converter, a controllable load/source, and an ultracapacitor is presented, to validate the proposed method. Several scenarii are applied to analyze the performance of the system in overloaded phases and theoretical and experimental results are presented.