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13961.能源竞争情报-第558期
[电力、热力、燃气及水生产和供应业] [2015-09-08]
本报告从能源行业事件分析;竞争环境、竞争对手、行业数据等几个方面进行了分析评论。
关键词:行业事件分析;竞争环境;竞争对手;行业数据
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13962.能源竞争情报-第557期
[电力、热力、燃气及水生产和供应业] [2015-09-08]
本报告从能源行业事件分析;竞争环境、竞争对手、行业数据等几个方面进行了分析评论。
关键词:行业事件分析;竞争环境;竞争对手;行业数据
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13963.全球智能电网远程终端单元RTU的市场报告(2015-2019年)
[信息传输、软件和信息技术服务业,电力、热力、燃气及水生产和供应业] [2015-09-06]
An RTU is a control device that helps the master device (SCADA) to monitor and communicate with devices in the grid placed in different geographical locations. RTUs are used in a broad range of electrical and process automation devices wherein supervisory control and data acquisition (SCADA) is required to monitor and control the equipment. RTUs collect data from field equipment and communicate commands from the master device. This is done through a wired connection (telephone line, cables, or Ethernet) or wireless connection. The operators receive data in real time so that they are aware of the complete grid situation and can make any changes to the grid when required. RTUs increase automation in substations, leading to optimal distribution of power. They also correct any anomalies that may lead to loss of power in transmission and distribution (T&D), reduce equipment damage, and improve power quality and reliability. RTUs can be used to control and monitor water treatment and distribution plants, power T&D operations, and oil and gas lines.
关键词:RTU;控制装置;帮助;主设备;监测;设备进行通信;远程终端;电气和过程;自动化设备
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13964.全球变电站自动化市场报告(2015-2019年)
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-06]
Substation automation is the upgrading of existing electric power substations. It involves integrating intelligent technologies and equipment such as relational databases and advanced communication systems into power grids. Automating substations allows electric utilities to monitor and control their T&D processes remotely, thus ensuring proper power distribution.
关键词:变电站;自动化;电力变电站;升级;集成智能技术;设备;数据库;通讯系统;电网
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13965.全球工业UPS市场报告(2015-2019年)
[电力、热力、燃气及水生产和供应业,电气机械和器材制造业] [2015-09-06]
UPS systems provide emergency power when the main power fails. It is used to protect equipment and machinery from unexpected power disruptions that could otherwise result in loss of productivity. UPS systems are of two types: online and offline. Online/double conversion UPS The online UPS is a double conversion system in which batteries are connected to an inverter to avoid power-transfer switches. The primary advantage of the online UPS is its ability to provide constant power and avoid momentary power lapses.
关键词:UPS系统;提供;应急电源;保护;设备和机械;提供;恒定的功率;避免;瞬时;停电失误
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13966.作为高效燃料电池的不含金属的氧还原催化剂和氧石墨烯
[化学原料和化学制品制造业,电力、热力、燃气及水生产和供应业] [2015-09-03]
Oxygen reduction reaction (ORR) is important in fuel cells. Although platinum nanoparticles can catalyse the ORR in an efficient way, the high cost of the platinum catalysts, together with its limited reserves in nature, has been shown to be the major 'showstopper' to mass market fuel cells for commercial applications. Following our earlier work on metal-free, nitrogen- doped carbon nanotubes (Gong, K.; Du, F.; Xia, Z.; Durstock, M.; Dai, L. Science 2009, 323, 760) and nitrogen-doped graphene sheets (Qu, L.; Liu, Y.; Baek, J.-B.; Dai, L. ACS Nano 2010, 4, 1321) as highly efficient ORR, we have developed in this project new metal-free and oxygen-free graphene materials by either edge-functionalization or ball milling as efficient electrocatalysts for ORR in fuel cells and other applications, including dye-sensitized solar cells (DSSCs).
关键词:催化剂;燃料电池;石墨烯;纳米技术
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13967.前方作战基地使用的能源管理系统的优化气体发生器效率
[电力、热力、燃气及水生产和供应业,电气机械和器材制造业] [2015-09-03]
A Forward Operating Base (FOB) is designed to support combat operations in an austere environment, which often lacks pre-existing infrastructure. On-site diesel generators are the primary source of FOB electricity. Traditionally, each generator is connected to its own set of loads and operates independently from other generators. The benefits of transitioning from traditional generator employment to an alternative architecture using an Energy Management System (EMS) were investigated in this thesis. The EMS provides an interface between power sources, loads, and energy storage elements to form a microgrid. Using power electronics and programmable logic, the EMS provides capabilities such as power source selection, power metering, flow control, and peak power management. These capabilities enable more efficient generator utilization by matching real-time load demand to the smallest capable power source, reducing overall fuel consumption. The EMS offers redundancy as it can connect any one of multiple power sources to critical loads. A hardware- based laboratory experiment demonstrated the ability to transition from one power source to another while providing uninterrupted current to the load. The results of the experiment validate a Simulink model of the EMS. An example load profile was applied to the model to compare overall fuel consumption between the traditional architecture and the EMS-enabled microgrid.
关键词:柴油燃料;发电机;能源管理
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13968.使用铝纳米颗粒进行光照激活运动和点火
[电力、热力、燃气及水生产和供应业,电气机械和器材制造业] [2015-09-03]
The aluminum nanoparticles (Al NPs) are demonstrated to serve as active photothermal media, to enhance and control local photothermal energy deposition via the photothermal effect activated by localized surface plasmon resonance (LSPR) and amplified by Al NPs oxidation. The activation source is a 2-AA-battery-powered xenon flash lamp. The extent of the photothermally activated movement of Al NPs can be approx. 6 mm. Ignition delay can be approx. 0.1 ms. Both scanning electron microscopy and energy-dispersive X-ray spectroscopy measurements of motion-only and after-ignition products confirm significant Al oxidation occurs through sintering and bursting after the flash exposure. Simulations suggest local heat generation is enhanced by LSPR. The positive- feedback effects from the local heat generation amplified by Al oxidation produce a large increase in local temperature and pressure, which enhances movement and accelerates ignition.
关键词:电池能源;光热光谱分析;等离子体
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13969.现实世界电力系统数据事件检测的大规模探索性分析,清洁和建模
[电力、热力、燃气及水生产和供应业,信息传输、软件和信息技术服务业] [2015-09-03]
In this paper, we present an approach to large-scale data analysis, Divide and Recombine (D&R), and describe a hardware and software implementation that supports this approach. We then illustrate the use of D&R on large-scale power systems sensor data to perform initial exploration discover multiple data integrity issues, build and validate algorithms to filter bad data, and construct statistical event detection algorithms. This paper also reports on experiences using a non-traditional Hadoop distributed computing setup on top of a HPC computing cluster.
关键词:算法;计算机程序;分布式数据处理;划分和重组
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13970.光伏发电并网逆变器的建模与分析
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-09-02]
In order to improve the efficiency of photovoltaic generation as well as the power quality,grid-connected inverters for PV generation research was carried out for photovoltaic maximum power point tracking.Based on some current studies on the incremental conductance method,an advanced incremental conductance control algorithm was proposed,which can track maximum power point rapidly and accurately.The oscillation phenomenon,which exists near the maximum power point,was improved at a great extent,so to the efficiency of photovoltaic cells generation electricity.The inverter control system has an advantage in its high speed and flexibility by applying advanced control algorithm.And the source harmonic current is remarkably reduced.In addition,the power factor is enhanced and the power quality is improved.Finally,according to the principle of inverter control system and based on the analysis on the mathematical model of photovoltaic inverter,a simulation model of that is established based on MATLAB/SIMULINK.
关键词:光伏发电;并网;逆变器;MPPT