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Power and Energy Magazine, IEEE

Issue 6 • Date Nov.-Dec. 2012

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Displaying Results 1 - 19 of 19
  • Front Cover

    Page(s): C1
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  • Table of Contents

    Page(s): 1
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  • Society Listing

    Page(s): 2
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  • The Solution May Be DC: Its Part in the Future of Our Electric Power System [From the Editor]

    Page(s): 4
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  • Standing Amid Giants: Recognizing Our Colleagues in the Power Field [Leader's Corner]

    Page(s): 6 - 8
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  • DC Technologies: Solutions to Electric Power System Advancements [Guest Editorial]

    Page(s): 10 - 17
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  • Innovative Smart Grid Technologies Conference Schedule Expands Worldwide

    Page(s): 16
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  • High-Wire Act: HVdc Technology: The State of the Art

    Page(s): 18 - 29
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2591 KB) |  | HTML iconHTML  

    Developed to meet a combination of technical and economic considerations, high-voltage dc (HV dc) was launched in 1954 with the first commercial transmission link between the island of Gotland and the Swedish mainland. Since then, HV dc technology has advanced dramatically, and more than 100 HV dc transmission systems have been installed around the world. View full abstract»

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  • Platforms for Change: High-Voltage DC Converters and Cable Technologies for Offshore Renewable Integration and DC Grid Expansions

    Page(s): 30 - 38
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    HVdc and cable technologies exist today that permit offshore integration and planning of point-to-point dc links that can be expanded into HVdc grids. Several VSC HVdc links are now in operation offshore in the harsh North Sea environment. Following the rapid increase in power transmission capacity and loss reduction, several new projects in the gigawatt range are in the construction phase. The benefits of larger intercontinental grids are being demonstrated in several ongoing studies. The first MT HVdc networks can therefore be seen as initial building blocks on the way to a larger offshore grid. View full abstract»

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  • Magic Bus: High-Voltage DC on the New Power Transmission Highway

    Page(s): 39 - 49
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    The interconnected electric power grid is the single largest and most complex machine in the world. Power outages, even for a short interval, have a very low probability but an enormous impact. Transmission systems around the world are facing increasing load demands, and system elements are being pushed toward their thermal limits. Wide-area power trading with varying supply and load patterns is contributing to the ever-increasing congestion. The power grid of the future must be secure, cost effective, and environmental friendly yet reliably integrated and built with intelligent solutions and innovative technologies. High-voltage dc (HVDC) transmission systems are a proven tool in tackling these challenges. View full abstract»

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  • Edison Redux: 380 Vdc Brings Reliability and Efficiency to Sustainable Data Centers

    Page(s): 50 - 59
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    We are on the cusp of a great technology transition in power distribution from ac to dc at the edge of the grid. Data centers are merely one of the first industries to embrace the coming tide. The transition on the customer side of the meter is on the order of what happened over the last 40 years with personal computers, the Internet, and cell phones. The predominant use of power electronics in almost everything we buy new today makes them natively dc devices. As a society, we could be more efficient and sustainable if we were to skip the last ac-to-dc conversion. At some point soon, when the majority of the load base is natively dc, we reach a tipping point where ac and hot power converter “bricks” on everything are no longer sustainable. Add to this distributed generation, distributed energy storage, and renewable carbon-free power sources that prefer dc, and one can conclude that the transition is not only necessary but inevitable. View full abstract»

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  • DC, Come Home: DC Microgrids and the Birth of the "Enernet"

    Page(s): 60 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2854 KB) |  | HTML iconHTML  

    Most discussions about ac versus dc electricity include a retelling of the famous technical and commercial battle between Edison and Westinghouse/Tesla. It's a story about everything from electrocuting elephants at state fairs to the ambitious work of electrifying both urban and rural America. It's the tale of one of man's greatest engineering feats. It tells of a centralized power generation system based on the dominant use of incandescent light bulbs and ac constant-speed motors. In the end though, it is a retelling of history and unfortunately, it is a history that doesn't project. View full abstract»

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  • Ship to Grid: Medium-Voltage DC Concepts in Theory and Practice

    Page(s): 70 - 79
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    Corporate research centers, universities, power equipment vendors, end users, and other market participants around the world are beginning to explore and consider the use of dc in future transmission and distribution system applications. Recent developments and trends in electric power consumption indicate an increasing use of dc-based power and constant power loads. In addition, growth in renewable energy resources requires dc interfaces for optimal integration. A strong case is being made for intermeshed ac and dc networks, with new concepts emerging at the medium-voltage (MV) level for MV dc infrastructure developments. View full abstract»

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  • The Schoellkopf Disaster: Aftermath in the Niagara River Gorge [History]

    Page(s): 80 - 96
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    Niagara Mohawk Power Corporation's (Niagara Mohawk's) hydroelectric Schoellkopf Station was located in the Niagara River Gorge in the City of Niagara Falls, New York, USA. It was the largest privately owned hydroelectric station in the world. Schoellkopf, actually three adjacent stations: 3A, 3B, and 3C (see Figure 1), consisted of 21 generating units totaling 454,500 rated hp (334,800 rated kW). Stations 1 and 2 were the historic Adams stations located on the Niagara River above Niagara Falls. Station 3A, built 19051914, contained units 115 (numbered south to north); 13 horizontal 10,000-hp turbines (nine operating at 60 Hz and four operating at 25 Hz with generators rated 8,000 kW and 7,200 kW, respectively), plus two 1,000-hp station service units (see Figure 2). A wall separated the turbine and generator rooms. Station 3B, built 19181920, contained units 1618 (numbered north to south). These were vertical 37,500-hp, 25-Hz machines with generators rated 26,000 kW each (see Figure 3). Station 3C, built 19211924, contained units 1921 (numbered north to south). These were vertical 70,000-hp, 25-hz units with generators rated 52,000 kW each. The hydraulic head was approximately 210 ft (64 m). Power from the 12-kV Station 3A generators was distributed locally via underground cables. Power from the 12-kV Station 3B generators was transmitted on overhead lines to Harper Station located 2.8 mi (4.5 km) east of Schoellkopf. Power from the 12-kV Station 3C generators was transformed to 69 kV and transmitted overhead to Harper Station. View full abstract»

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  • 2013 IEEE Power & Energy Society General Meeting

    Page(s): 97
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  • GIL Update: Ready for High Power Transmissions [Book Review]

    Page(s): 98 - 99
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  • PES Meetings: For More Information, www.ieee.org/power [Calendar]

    Page(s): 100
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  • DC Versus AC: The Second War of Currents Has Already Begun [In My View]

    Page(s): 104 - 103
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  • 2012 IEEE Power & Energy Magazine Annual Index

    Page(s): 105 - 112
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Aims & Scope

IEEE Power & Energy Magazine is a bimonthly magazine dedicated to disseminating information on all matters of interest to electric power engineers and other professionals involved in the electric power industry.

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Meet Our Editors

Editor-in-Chief
Melvin I. Olken
molken@ieee.org