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“城市配电网电能质量综合治理研究”通过成果鉴定
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作者 马俊华 《江苏电机工程》 2005年第2期57-57,共1页
关键词 城市配电网 电能质量指标 标准 城市配电网电能质量综合治理研究” 2005年1月20日 江苏省电力科学研究院 南京供电公司
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Strategies Regarding Operating Voltage Levels in Distribution Networks
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作者 G. Grigoras G. Cartina 《Journal of Energy and Power Engineering》 2010年第6期60-63,共4页
The power/energy losses reduction in distribution systems is an important issue during planning and operation, with important technical and economical implications. Thus, the energy losses minimization implies not onl... The power/energy losses reduction in distribution systems is an important issue during planning and operation, with important technical and economical implications. Thus, the energy losses minimization implies not only the technical improvement of the network, through its renewal with the introduction of the technological innovations in the equipment and circuit components as well as the optimal planning of the design and development of the network, but also requires the use of the methods and software tools to facilitate the operation process. The paper presents a strategy for power / energy saving which is replacement of the 6 kV voltage level with 20 kV voltage level. In this line, different urban distribution networks were analyzed using fuzzy techniques for load modeling. 展开更多
关键词 Voltage levels power/energy saving distribution networks fuzzy techniques.
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UAQ4 Magnetic Levitating Train: Propulsion System for Urban Transportation
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作者 Gino D'Ovidio Francesco Crisi 《Journal of Energy and Power Engineering》 2012年第12期1952-1956,共5页
This paper discusses the design of the propulsion system of the UAQ4 (University of L'Aquila, model 4) magnetic levitating train which is used for transportation applications in urban environments. UAQ4 is the only... This paper discusses the design of the propulsion system of the UAQ4 (University of L'Aquila, model 4) magnetic levitating train which is used for transportation applications in urban environments. UAQ4 is the only magnetic levitating vehicle with resistance motion, except for aerodynamic drag and with energy consumption near zero at low speed. The feasibility of the system has been successfully verified and tested in the laboratory. Propulsion and braking are provided by a novel direct-current linear stepper motor, with the primary formed by permanent magnets distributed on central beam of the track, and the secondary by coils on board the vehicle, instead of the present alternate current linear motors that have well-known disadvantages. The motor working principles are described, and its performances are analyzed, by a finite element numerical model which allows modifying the most important parameters of the system. The main components of a full scale motor for urban transportation are measured and discussed. 展开更多
关键词 Linear motor PROPULSION magnetically levitating train transportation system energy consumption.
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明天我们向谁去要电
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作者 高峰 《中学物理教学参考》 2007年第9期29-30,共2页
城市里的拉闸限电成了一件常事.也许,在未来电就成为一种稀缺的资源,人们不禁会想这么一个问题:明天,我们向谁去要电?
关键词 节能建筑 中央空调改造 绿色照明 电梯 城市电能 新能源
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Recent progress and future prospects of sodium-ion capacitors 被引量:4
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作者 Rui Jia Guozhen Shen Di Chen 《Science China Materials》 SCIE EI CSCD 2020年第2期185-206,共22页
To satisfy the requirements for various electric systems and energy storage devices with both high energy density and power density as well as long lifespan, sodium-ion capacitors(SICs) consisting of battery anode and... To satisfy the requirements for various electric systems and energy storage devices with both high energy density and power density as well as long lifespan, sodium-ion capacitors(SICs) consisting of battery anode and supercapacitor cathode, have attracted much attention due to the abundant resources and low cost of sodium source. SICs bridge the gap between the batteries and the supercapacitors,which can be used as competitive candidates for large-scale energy storage. In this review, the battery-type anode materials and the capacitor-type cathode materials are classified and introduced in detail. The advantages of various electrolytes including organic electrolytes, aqueous electrolytes and ion liquid electrolytes are also discussed sequentially. In addition, from the perspective of practical value, the presentations of the SICs at the current situation and the potential application in urban rail are displayed. Finally, the challenge,future research and prospects towards the SICs are put forward. 展开更多
关键词 sodium-ion hybrid capacitors battery-type anode capacitor-type cathode electrolytes
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