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针对目前电动车续驶里程短、电池易老化、爬坡能力差、能量回收效率低的缺陷,研究以比功率高、循环寿命长的超级电容作为辅助电源,实现了一种新型超级电容-蓄电池复合电源系统.从超级电容-蓄电池系统的结构出发,对电动车的行驶工况进行了具体分析,构建了超级电容充电模型和超级电容-蓄电池复合电源系统模型.仿真和实际试验结果表明,该复合电源系统能有效回收制动能量,从而使蓄电池的低能量密度和低功率密度等缺陷得到弥补,进而提高电动车动力性能和电能的利用率,使电动车的续驶里程增长,能有效地降低蓄电池电压和电流幅值波动,延长蓄电池的使用寿命. 相似文献
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风光发电功率具有强随机性和波动性,直接并网会引起电网频率不稳定,可利用混合储能系统有效平抑。文中以全钒液流电池和超级电容组成混合储能系统作为研究对象,提出一种混合储能容量配置方法。首先,采用自适应移动平均算法确定风光并网功率和储能系统功率;然后,利用鲸鱼优化的VMD分解储能系统功率,得到一系列模态分量和残差量,考虑残差量中可能包含的丰富信息,对其作相同的VMD分解,将两次分解产生的各模态分量分别作希尔伯特边际谱分析,确定分界频率,将所有低于分界频率的模态分量分配给全钒液流电池,其余由超级电容承担;最后,根据全钒液流电池和超级电容各自吸收、补偿功率情况,配置储能系统的额定功率和额定容量。算例分析表明,文中方法能够有效平抑风光输出功率波动,并实现混合储能系统额定功率、容量合理配置。 相似文献
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针对燃料电池的特点,提出了以超级电容为辅助储能环节的燃料电池发电系统,重点讨论了双向DC/DC变换器和单级逆变器的拓扑结构和控制策略。仿真实验结果表明,文中提出的燃料电池发电系统和控制策略稳定可靠,可以作为燃料电池发电系统的候选方案。 相似文献
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本文介绍了一种新型后备电源系统--氢燃料备用电源系统。本文从氢燃料备用电源系统的技术原理和节能减排的角度讨论了氢燃料电源与普通铅酸电池作为通信基站备用电源的优劣,介绍了氢燃料备用电源系统国内外发展现状;提出氢燃料备用电源应用于目前传统基站与户外机柜的方案;最终得出现阶段氢燃料备用电源系统使用中面临的问题及解决方法,并对今后氢燃料备用电源系统在通信基站中的应用进行了展望。 相似文献
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纯电动汽车设计关键技术很多,其中很重要的技术之一是能源管理系统设计。一个完整的复合能源管理系统由综合电池和超级电容管理系统和能量控制策略二部分组成。 相似文献
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《Spectrum, IEEE》2001,38(7):48-53
The long-awaited and much-discounted National Energy Policy report, issued by a task force headed by Vice president Dick Cheney, was not the one-dimensional document critics and adversaries of the Bush administration eagerly awaited. Much of the criticism since release of the report would seem, in fact, to reflect more what people expected to read than what is actually in the report. This paper excerpts the report. In addition, for a contrasting view, the paper excerpts a report prepared by researchers at several national laboratories which presents quite a different outlook on the role fossil fuels need play in the country's energy future. In the report, the very real crisis in electricity has been bundled with concerns about increased prices for gasoline and home heating oil-increases that may prove quite transitory-to sell the public hard on an all-out effort at new production, with environmental protection given much less emphasis. What the administration seeks from the public, at bottom, is much more production of fossil fuels and streamlined or less onerous procedures for approving new plants and infrastructure 相似文献
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The ongoing, in-depth transformation of the electricity sector towards increased use of alternative, renewable energy sources extends beyond a simple decentralisation drive in the electricity market. The transformation process is characterised by the interplay of old and new technologies from the energy sector as well as structural coupling with other sectors, such as the information and communications technology (ICT), enabling the technology transfer as well as market entry by information technology (IT) actors. Blockchain-based technologies have the potential to play a key role in this transition by offering decentralised interfaces and systems as well as an alternative approach to the current organisation form of the energy market. This paper discusses the applicability and prospects for blockchain-based technologies in the energy sector, which are described using the term “blockchain energy”. For the purposes of this study, blockchain energy encompasses all socio-technical and organisational configurations in the energy sector based on the utilisation of the blockchain principle for energy trading, information storage, and/or increased transparency of energy flows and energy services. In the following chapters, the authors present and discuss the current transformation in the electricity market, followed by a review of the different utilisation possibilities for blockchain technologies in the energy sector and a discussion of the barriers and potential for blockchain energy using a transition studies perspective. Finally, the opportunities and risks of blockchain energy are discussed. 相似文献
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信息技术设备无论在科技发达的工业化国家还是在发展中国家,无论是在办公场所、学校还是在家庭,都获得了广泛应用. 相似文献
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研究了一种抗磁悬浮式振动能量采集器,首先结合理论对抗磁悬浮振动采集器的工作原理进行了详细讨论,之后提出了适用于本结构的6倍压整流电路并对其进行仿真优化,最后利用振动台测试其在5 Hz、0.5 gn的激励条件下的输出特性,6倍压电路输出能够点亮LED灯,当充电时间为20 s时,输出电压可达1.7 V。该抗磁悬浮式振动能量采集器有望给便携式微型电子供电。 相似文献
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21世纪,能源领域将重点放在核能、风能及太阳能等领域,各个国家也都相继提出自己的优惠政策,因此设计出切实可行的新能源运行方案是非常之必要的。基于此,阐述了风能、太阳能发电、储能、并网的关联可行方案,全部采用环保无污染产品作为基础搭建。 相似文献