منابع مشابه
Power lines
In the United States, the development of biofuels has been presented as a potential way for America to become less dependent on foreign oil, while at the same time reducing greenhouse gas emissions. Both of these potential benefits are appealing, but the feasibility of biofuels, from both scientific and economic perspectives, is still an open question and much debated. In December, President Bu...
متن کاملRouting Algorithm for Power Lines
Abstra ct This paper presents new routing protocol designed for use in AMR and AMM systems using powerline communication (PLC) for data collecting and network control at their last mile. First part of the paper describes the AMR and AMM systems and the reasons for their implementation. Further the narrowb and powerline communication as relatively simple way for data transfers at the last mile i...
متن کاملOutput Impedance Diffusion into Lossy Power Lines
Coping with lossy distribution lines has been an obstacle in control and stability of power networks. Often, imposing an inductive output impedance to the sources has been considered as a means to justify the commonly adopted assumption of purely inductive lines, which in turn facilitates the construction of energy-based Lyapunov functions. In this paper, we propose a measure to evaluate the in...
متن کاملLightning Protection of Overhead Power Distribution Lines
Distribution lines are often located in areas with high ground flash densities, being therefore subject to lightning-caused power interruptions. This paper presents an overview of the various types of lightning overvoltages that can arise on overhead power distribution networks, as well as typical voltage waveforms. The effectivenesses of the most important methods for mitigating such overvolta...
متن کامل1 . Reactive Power Compensation of Transmission Lines
1.1 General Introduction During the past two decades, the increase in electrical energy demand has presented higher requirements from the power industry. More power plants, substations, and transmission lines need to be constructed. However, the most commonly used devices in present power grid are the mechanically-controlled circuit breakers. The long switching periods and discrete operation ma...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2008
ISSN: 0960-9822
DOI: 10.1016/j.cub.2008.03.001