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Transmission Technologies (transmission + technology)

Distribution by Scientific Domains
Engineering60%

Selected Abstracts

System aspects of 1100 kV AC transmission technologies in Japan

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, Issue 1 2009
Eiichi Zaima Senior Member
Abstract This paper describes the system aspects of 1100 kV AC transmission technologies with the UHV transmission project in Japan. For realization of technical and economical optimization throughout the design of the transmission line and the substation, solutions for network problems and insulation coordination specific to UHV AC transmission systems were studied in Japan. They include fast multiphase reclosing systems by HSGS (High Speed Grounding Switch) and overvoltage control by the application of surge arresters and circuit breakers with closing/opening resistors. These sophisticated technologies provide highly reliable and economical 1100 kV substations and transmission lines. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. [source]

Development of an optimization model for energy systems planning in the Region of Waterloo

INTERNATIONAL JOURNAL OF ENERGY RESEARCH, Issue 11 2008
Y. P. Cai
Abstract In this study, a large-scale dynamic optimization model (University of Regina Energy Model, UREM) has been developed for supporting long-term energy systems planning in the Region of Waterloo. The model can describe energy management systems as networks of a series of energy flows, transferring extracted/imported energy resources to end users through a variety of conversion and transmission technologies over a number of periods. It can successfully incorporate optimization models, scenario development and policy analysis within a general framework. Complexities in energy management systems can be systematically reflected; thus, the applicability of the modeling process can be highly enhanced. Four scenarios (including a reference case) are considered based on different energy management policies and sustainable development strategies for in-depth analysis of interactions existing among energy, socio-economy and environment in the Region. Useful solutions for the planning of energy management systems have been generated, reflecting trade-offs among energy-related, environmental and economic considerations. They are helpful for supporting (a) adjustment or justification of the existing allocation patterns of energy resources and services, (b) allocations of renewable energy resources, (c) formulation of local policies regarding energy consumption, economic development and energy structure, and (d) analysis of interactions among economic cost, system efficiency, emission mitigation and energy-supply security. Results also indicate that UREM can help tackle dynamic and interactive characteristics of the energy management system in the Region of Waterloo and can address issues concerning cost-effective allocation of energy resources and services. Thus, it can be used by decision makers as an effective technique in examining and visualizing impacts of energy and environmental policies, regional/community development strategies and emission reduction measures within an integrated and dynamic framework. Copyright © 2008 John Wiley & Sons, Ltd. [source]

Technology, security, and individual privacy: New tools, new threats, and new public perceptions

JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY, Issue 3 2005
Lee S. Strickland
Highly portable information collection and transmission technologies such as radio frequency identification (RFID) tags and smart cards are becoming ubiquitous in government and business,employed in functions including homeland security, information security, physical premises security, and even the control of goods in commerce. And, directly or indirectly, in many of these applications, it is individuals and their activities that are tracked. Yet, a significant unknown is (a) whether the public understands these technologies and the manner in which personally identifiable information may be collected, maintained, used, and disseminated; and (b) whether the public consents to these information practices. To answer these and related questions, we surveyed a select group of citizens on the uses of this technology for business as well as homeland security purposes. We found a significant lack of understanding, a significant level of distrust even in the context of homeland security applications, and a very significant consensus for governmental regulation. We conclude that a primary objective for any organization deploying these technologies is the promulgation of a comprehensive Technology Privacy Policy, and we provide detailed specifications for such an effort. [source]

Auctions Versus Beauty Contests: The Allocation of UMTS Licences in Europe

ANNALS OF PUBLIC AND COOPERATIVE ECONOMICS, Issue 1 2003
L. Cartelier
The deployment of the so-called UMTS 3rd generation mobile networks is a step of vital importance for the promotion of competition in the telecommunications sector. The provision of high-traffic services presupposes that operators have access to the hertzian spectrum. The hertzian spectrum is a natural resource whose scarcity derives from the fact that only part of it is usable, for both technical and economic reasons. While the resource was sufficient to meet users' needs, the hertzian spectrum was allocated for little or no charge, on the principle of ,first come, first served'. However, with the explosion of technical progress in transmission technologies, new applications and new forms of use appeared, leading to a drastic increase in potential demand. It is in this context that the idea of charging for use of the spectrum arose, so as to discourage uneconomical use of the resource (e.g. stockpiling, wastage), to ensure a fair allocation between competing users and to forestall congestion. The purpose of this paper is first to examine the procedures for the allocation of hertzian spectrum operating licences, from the points of view of efficiency, transparency and sharing of the surplus. We shall then compare the results from the two approaches that were actually used in Europe: the open ascending auction and the beauty contest, before turning our attention to new forms of public action that result from the process of liberalization. [source]