BP神经网络在反窃电系统中的研究与应用

针对我国供电企业电量自动化管理技术手段相对落后的问题,基于窃电的特点构建了反窃电指标评价体系,采用BP神经网络建立了反窃电模型,并结合实例探讨了在反窃电系统中运用BP神经网络的过程及应注意的问题.实例应用表明,反窃电指标评价体系科学、合理,BP神经网络应用于窃电嫌疑分析可行、有效.     

电力营销中用电检查及反窃电技术研究

用电检查是电力营销中的一个重要环节,此环节运作影响着整个电网的发展,也对电力企业的整体发展发挥着相当重要的作用。窃电现象给我国电力能源使用带来负面效应,也影响着电力营销效益和电网运行安全。针对用电检查现状以及窃电现象进行了分析,给出有效的反窃电治理方法。     

电力营销中用电检查及反窃电技术研究

用电检查是电力营销中的一个重要环节,此环节运作影响着整个电网的发展,也对电力企业的整体发展发挥着相当重要的作用。窃电现象给我国电力能源使用带来负面效应,也影响着电力营销效益和电网运行安全。针对用电检查现状以及窃电现象进行了分析,给出有效的反窃电治理方法。     

反窃电单相电能表存在的问题及解决办法

指出一型式反窃电单相电能表存在的有可能造成 100％接线误差的问题,并提出解决办法;推介反窃电功能更强的一型式反窃电单相电能表,稍经改进后是相当完善的反窃电单相电能表。     

基于“互联网+”反窃电管理模式的探讨

“互联网+”是满足电力企业反窃电管理升级需求的强有力工具之一,可以充分利用电力企业积累的海量历史用电数据,实现对窃电行为的快速、有效识别与分析。因此,简单介绍了窃电行为本质,论述了反窃电管理现状,提出了基于“互联网+”反窃电管理优势和部分应用原理,进一步分析了基于“互联网+”反窃电管理模式构建流程,结合实例探讨了基于“互联网+”反窃电管理的实现措施,确定利用“互联网+”对反窃电管理具有可行性。     

供电企业防窃电技术分析及学习系统的开发

结合当前供电企业的电力营销领域防窃电工作的现状,从供电企业、用户和防窃电的设备3个角度提出了解决窃电问题的技术措施和管理手段。并以此为基础,利用VB6.0开发出1款基于防窃电技术的学习系统,该系统对防窃电知识进行了有效的整合和分类,学习者可对各类窃电手段直接使用关键词进行查询,结构层次清晰,操作简便,易于学习。     

浅谈窃电及其防范措施

明确窃电管理工作的重要性,窃电管理工作的好坏直接关系着供电企业的经营效益和社会效益.对窃电行为的界定及窃电电量、窃电检查对象的确定等方面提出见解,对常见的窃电方式进行了较为详细的分析,并提出相应的防范措施.     

10kV箱式变电站防窃电技术的应用研究

随着我国电力事业的不断发展,电力设备防窃电技术的应用日益重要。本文以10kV箱式变电站防窃电技术为主题,对防窃电技术的应用进行了深入研究,旨在提高电力系统的安全性、可靠性及减少电能损失。首先,介绍了10kV箱式变电站的基本结构及工作原理,并对防窃电技术的重要性进行了分析。其次,详细阐述了防窃电技术的主要措施,包括加强设备管理、采用防窃电装置、优化变电站设计等。最后,通过实际案例分析,验证了防窃电技术在10kV箱式变电站中的有效性。本研究为10kV箱式变电站防窃电技术的应用提供了有益的参考。     

采取技术措施降低农村配电网线损

本文主要对如何降低农村配电网线损问题进行了研究，并提出了降低线损的措施。实践表明，所采取的措施能达到降低线损的目的，经济效益显著。     

上海市应用蓄热电锅炉的技术经济性分析

简要介绍了蓄热电锅炉的设计原理、设计方案及其应用前景。并且根据上海某宾馆的锅炉房设计实例，与各种其他的系统，例如燃油系统、燃煤系统等，进行了技术经济性分析，并比较了动态以及静态回收年限，为城市节能提出了一个新的思路。     

Performance assessment of thermal management systems for electric and hybrid electric vehicles

Thermal management systems (TMS) are one of the key components of electric and hybrid electric vehicles to achieve high vehicle efficiency and performance under all operating conditions. Current improvements in electric battery technology allow vehicles to have relatively long ranges, fast acceleration, and long life while keeping low‐maintenance costs and considerably lower emissions. However, the vehicle performance is significantly affected by the battery operating conditions. Moreover, the cell life cycle, safety, and possibility of thermal runaway significantly depend on peak temperature rise and temperature uniformity of the battery. Therefore, various TMSs are created to keep batteries within ideal operating ranges. In this article, three different TMS systems—passive cabin cooling (via air), active moderate liquid circulation (via refrigerant), and active liquid circulation (via refrigerant and coolant)—are analyzed and compared with electric and hybrid electric vehicles. A second law analysis is used to examine the areas of low exergy efficiency in each system and minimize the entropy generation based on the system configuration. Moreover, TMS systems are compared on the basis of battery temperature increase and temperature uniformity. Various parametric studies are conducted to compare the TMS in different ambient and operating conditions. On the basis of the analysis, the active liquid circulation (via refrigerant and coolant) is determined to have the lowest battery temperature increase (3.9 °C in 30 min) and most cell temperature uniformity (2.5 °C median) as well as the lowest entropy generation rate (0.0121 W/K) among the compared systems. Copyright © 2012 John Wiley & Sons, Ltd.     

Modelling of electric energy consumption in the AC electric arc furnace

In this paper, the variation of electric energy consumption in the AC electric arc furnace (EAF) with various production parameters is studied using a developed computer program. The energy equation is modelled using the first law of thermodynamics. The effects of temperature of liquid steel, stack gas, scrap pre‐heated and cooling water and duration at which the EAF cover is open on electric energy consumption are investigated. The calculated electric energy values are compared with the actual electric energy used in the EAF and values received from literature. They are in a good agreement. Copyright © 2002 John Wiley & Sons, Ltd.     

Economic and environmental evaluations of dedicated and residential electric tariffs for plug‐in electric vehicles

Plug‐in electric vehicle (PEV) owners may have multiple different electric tariffs offered by their local utility companies from which to choose. The offered PEV tariffs are designed mainly to shift the electric demand for charging cars to the time when the grid is less strained. This paper investigates both the economic and the environmental impacts of adopting dedicated PEV electric tariffs from the PEV owners' perspective. The overall conclusion is that the dedicated tariffs are well designed for PEVs from the economical perspective but not from the environmental perspective. Case studies of the cost minimization model show that on average the dedicated PEV tariffs will result in approximately half the cost of the electric bill and slightly lower greenhouse gas (GHG) emissions (less than 1%) compared with the standard flat‐rate residential tariffs. Case studies of the emission minimization model show that the GHG emissions can be reduced by 10.47% as compared with the cost minimization model, but this will lead to an increase in the total charging cost that can be as high as 15.44% on average.     

电炊具的节电窍门

本文对如何能使电炊具耗电量降下来,提出了相应的办法,为个人节省了开支,为国家节省了能源。     

改性材料电热元件应用于电热锅炉的研究

本文对用一种新型改性材料作为电热锅炉的加热元件进行了研究 ,并对影响该电热元件热力性能的各类因素作了较详尽的分析和探讨 ,提出了优化设计方案 ,旨在为电热锅炉电热元件的研究和设计提供理论依据。     

电锅炉用于供热系统的技术经济分析

通过能量利用及技术经济分析比较 ,认为目前在我国将电锅炉用于供热是不经济的。除一些特殊场合外 ,不宜大量采用     

应用刷镀技术修复机床导轨

金属切削机床导轨出现磨损及深度拉伤、划痕等缺陷时，均需进行恢复性修理，特别是对机床导轨不具备加工能力或条件有限的情况下，对导轨进行刷镀修复显得特别适用，本文简要介绍了对铸铁机床导轨的刷镀修复工艺及其要点。     

High-energy electrode investigation for plug-in hybrid electric vehicles

In addition to the development of high-energy density electrode materials for lithium-ion (Li-ion) batteries, other engineering approaches, such as electrode optimization, should be considered in order to meet the energy requirements of plug-in hybrid electric vehicles (PHEV). This work investigates the impact of the electrode thickness on the energy density of (Li-ion) batteries. The impedance results from the hybrid pulse power characterization (HPPC) test indicate that the electrode resistance is inversely proportional to the electrode thickness. This feature makes it possible to use thicker electrodes in (Li-ion) batteries to meet PHEV power requirements. The practical electrode thickness is determined to be around 100 μm, if considering the electrode mechanical integrity when using conventional PVDF binders. Furthermore, cycle performance shows that cells with a higher loading density have a similar capacity retention to cells with a lower loading density.