共查询到18条相似文献,搜索用时 93 毫秒
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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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Pierre Mars 《电子设计技术》2012,19(9):43-44,46,47
超级电容用于存储能量,并为能量采集器提供峰值功率。设计者在将它们与小型能量采集源配,对使用时,应考虑到几个重要因素。 相似文献
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微生物燃料电池(Microbial Fuel Cells,MFCs)已被认可为最具前景的可替代、可再生的清洁能源之一,但是其输出电压和电流较小,几乎难以直接驱动目前任何商用电子器件.在实际应用中,通常需要能量管理系统(PowerManagement System,PMS)来存储其输出能量,然后经变换处理后间歇式的驱动负载.在PMS中,超级电容器通常被选作为电能存储器件.由于MFC输出能量有限,如何使最多的能量转存到超级电容器中成为MFC应用领域重要的研究内容.通过分析MFC反应机理,采用目前普遍公认的MFC等效电路模型,提出了一种计算最优电容值的理论方法,选用该最优电容,能够使MFC在一个充电周期内产生的平均功率最大.基于建立的单室空气阴极MFC实验系统,进行了最优电容值检验实验.理论和实验结果验证了该方法的有效性. 相似文献
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随着我国国民经济持续快速发展.带动了能源消费长期高速增长。目前我国能源供给已呈现出紧张局面。因此,在重点能耗设备如锅炉等.如何建立篚源管理体系,系统规划能源管理工作,对节能减排、提升效益实现可持续发展具有重要的作用。 相似文献
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本文着眼于楼宇供电用燃料电池发电系统的研究,针对中等容量(几千瓦至几百千瓦)的功率变换装置,分析其运行特点和对系统结构和控制的基本要求,提出具体的系统方案与控制策略,满足楼宇供电燃料电池发电系统的并网发电和独立运行的要求。最后给出了一个5kVA的燃料电池发电装置试验结果。 相似文献
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Lai J.-S. Nelson D. J. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2007,95(4):766-777
Using a bidirectional dc-dc converter along with low-voltage energy storage for the high-voltage dc bus and traction motor drives has been a prominent option for hybrid electric and fuel cell vehicles. This paper will describe the significance of energy management power converters and their circuit topology options for efficiency, size, and cost considerations. Whether isolated or nonisolated, soft switching techniques have been widely used in high-power bidirectional dc-dc converters. Through some design examples, the component selection and circuit design optimization are discussed, and their efficiency evaluation results are also given. Major difficulties of developing a high-power bidirectional dc-dc converter are found in lack of high-power passive components and lack of multiphase dc-dc controllers. More development work needs to be done in these areas 相似文献
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本文介绍一种用现代电力电子的嵌入式技术、传感器技术、网络信息技术、现场总线(Profibus-DP)技术、计量技术及管理技术;对电源进行实时计量和优化管理。通过应用现场总线技术对用电量实时就地或远程监控和集中科学管理。 相似文献
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本文主要介绍了湖北某金属冶金有限公司WEMS能源管理中心系统的方案设计与施工应用,论述了安全、经济、行业分析诊断、综合节能降耗的能源管理系统,并对其设计原则、监测点选取、结构特点、功能特色进行了重点阐述。 相似文献
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Chandra R. Murthy 《International Journal of Wireless Information Networks》2009,16(3):102-117
This paper considers the problem of power management and throughput maximization for energy neutral operation when using an
energy harvesting sensor (EHS) to send data over a wireless link. The EHS is assumed to be able to harvest energy at a constant
rate, and use a fixed part of the energy harvested in a slot for measuring the channel state. The rest of the energy harvested
is available for transmission, however, it can be stored in an inefficient battery if it is not fully utilized. The key constraint
that the EHS needs to satisfy is energy neutrality, i.e., the expected energy drawn from the battery should equal the expected
energy deposited into the battery. In this scenario, two popular models for data transmission are contrasted: the constant
bit rate (CBR) model and the variable bit rate (VBR) model. In the CBR model, it is assumed that the EHS are designed to transmit
data at a constant rate (using a fixed modulation and coding scheme) but are power-controlled. In the VBR model, the EHS selects
both the transmit power and the data rate of transmission in each slot based on the channel instantiation. A framework under
which the system designer can optimize several parameters of the EHS that determine the average data rate performance when
the channel is Rayleigh fading is developed. Using this framework, the two transmission schemes are contrasted. It is shown
that, with the right choice of parameter settings, the CBR scheme can perform nearly as well as the VBR scheme at significantly
lower complextiy. The usefulness and validity of the framework developed is illustrated through simulations for specific examples.
Chandra R. Murthy received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Madras in 1998, the M.S. and Ph.D. degrees in Electrical and Computer Engineering from Purdue University and the University of California, San Diego, in 2000 and 2006, respectively. From 2000 to 2002, he worked as an engineer for Qualcomm Inc., where he worked on WCDMA baseband transceiver design and 802.11b baseband receivers. From August 2006 to 2007, he worked as a staff engineer at Beceem Communications Inc. on advanced receiver architectures for the 802.16e Mobile WiMAX standard. In September 2007, he joined as an assistant professor at the Department of Electrical Communication Engineering at the Indian Institute of Science, where he is currently working. His research interests are primarily in the areas of digital signal processing, information theory, estimation theory, and their applications in the optimization of MIMO, OFDM and CDMA wireless communication systems. Currently, he is working on Cognitive Radio, Energy Harvesting Wireless Sensors and MIMO systems with finite-rate channel-state feedback. 相似文献
Chandra R. MurthyEmail: |
Chandra R. Murthy received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Madras in 1998, the M.S. and Ph.D. degrees in Electrical and Computer Engineering from Purdue University and the University of California, San Diego, in 2000 and 2006, respectively. From 2000 to 2002, he worked as an engineer for Qualcomm Inc., where he worked on WCDMA baseband transceiver design and 802.11b baseband receivers. From August 2006 to 2007, he worked as a staff engineer at Beceem Communications Inc. on advanced receiver architectures for the 802.16e Mobile WiMAX standard. In September 2007, he joined as an assistant professor at the Department of Electrical Communication Engineering at the Indian Institute of Science, where he is currently working. His research interests are primarily in the areas of digital signal processing, information theory, estimation theory, and their applications in the optimization of MIMO, OFDM and CDMA wireless communication systems. Currently, he is working on Cognitive Radio, Energy Harvesting Wireless Sensors and MIMO systems with finite-rate channel-state feedback. 相似文献
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本文介绍了2.5kW质子交换膜燃料电池(PEM Fuel Cell---PEMFC)系统的建模、仿真及其优化等研究工作,包括燃料电池堆的动态仿真模型建模过程、湿度和温度控制电路的设计过程。对湿度控制电路的新型模型参考控制策略的建模、仿真及应用表明,该控制策略能够显著提高系统供电质量,以及保证系统长时期运行的稳定性。 相似文献
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本文针对能源危机问题,从节能环保的角度阐述了超级电容器发展历史、基本原理、性能特点,重点论述了其在新能源汽车领域的应用情况,为储能技术的发展和应用,起到了参考和借鉴作用。 相似文献