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INTELEC 07 - 29th International Telecommunications Energy Conference

Date Sept. 30 2007-Oct. 4 2007

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Displaying Results 1 - 25 of 202
  • INTELEC

    Publication Year: 2007, Page(s): c1
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  • International telecommunications energy conference

    Publication Year: 2007, Page(s): c2
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  • [Copyright notice]

    Publication Year: 2007, Page(s): II
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  • Message from the Chairman

    Publication Year: 2007, Page(s): III
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  • INTELEC® 2007 Management Committee

    Publication Year: 2007, Page(s): IV
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  • INTELEC® 2007 Advisory Committee

    Publication Year: 2007, Page(s): V
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  • 2007 INTELEC® Conference Executive Committee

    Publication Year: 2007, Page(s): VI
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  • INTELEC® 2007 Honor Committee

    Publication Year: 2007, Page(s): VII
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  • [Blank page]

    Publication Year: 2007, Page(s): VIII
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  • Table of contents

    Publication Year: 2007, Page(s):IX - XXII
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  • Author's index

    Publication Year: 2007, Page(s):XXIII - XXVI
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  • Session 1: Keynote speeches

    Publication Year: 2007, Page(s): 1
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  • Session 2: Fuel cells

    Publication Year: 2007, Page(s): 2
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  • Fuel-cells in the required packaging

    Publication Year: 2007, Page(s):3 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (59 KB) | HTML iconHTML

    One of the major properties of a commercial fuel-cell-system is the right packaging for the provided operational environment. The following description explains the needs and experiences for such applications in indoor and outdoor environments. View full abstract»

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  • Operational feed-back on Fuel Cell solutions for telecom needs

    Publication Year: 2007, Page(s):6 - 10
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB) | HTML iconHTML

    AXANE fuel cell systems are based on direct hydrogen fueled proton exchange membrane (PEM) technology, designed to provide prime power, external backup power or extended autonomy UPS power to telecommunication and other niche applications. Used to replace or complement lead acid batteries or a power generator engine, fuel cell technology is an AC or direct DC power source which offers significant ... View full abstract»

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  • Permanent premium power for data centers - The fuel cell power station type HotModule®

    Publication Year: 2007, Page(s):11 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (262 KB) | HTML iconHTML

    The molten carbonate fuel cell type HotModule has already gained considerable success in various industrial applications. The fuel cell power station supplies cooling and electricity permanently. A new way of clean and efficient energy supply for datacenters and telecommunication installations is presented in this paper. View full abstract»

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  • Session 3: Converters and control techniques

    Publication Year: 2007, Page(s): 15
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  • PI guaranteed cost controller with feedforward compensation for the PWM voltage-source converters

    Publication Year: 2007, Page(s):16 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (299 KB) | HTML iconHTML

    In this paper, we introduce a new controller that is adequate for the 3-phase PWM-VSC with small dc-link capacitor. The controller combines the benefits of the Pi-control and the feedforward compensation under the general framework of the optimal guaranteed cost control theory. Simulation studies are carried out to confirm the effectiveness of the proposed control strategy. View full abstract»

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  • A buck converter operating in PFM mode, mathematical model and simulation analysis

    Publication Year: 2007, Page(s):23 - 26
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB) | HTML iconHTML

    This paper describes a possible control method for the operation of a variable switching frequency buck converter. Starting from the ideal model for a Pulse Frequency Modulation (PFM) mode dc-dc converter [1], a simple control system, involving only two comparators and a latch is presented here. A mathematical model for this frequency modulated control system is developed and demonstrated. To prov... View full abstract»

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  • A wide bandwidth resonant digitally controlled 48 V voltage regulator module

    Publication Year: 2007, Page(s):27 - 30
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (162 KB) | HTML iconHTML

    The paper presents a novel bilinear discrete time model with pre-warping Tustin's rule for the digitally controlled self-oscillating resonant converters. The model employs the sampled data technique to provide a means for an accurate stability design and transient response prediction. The proposed method defines the crossover frequency of the converter, which is a critical parameter for a fast tra... View full abstract»

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  • Session 4: High voltage direct current (HVDC)

    Publication Year: 2007, Page(s): 31
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  • Evaluation of 400V DC distribution in telco and data centers to improve energy efficiency

    Publication Year: 2007, Page(s):32 - 39
    Cited by:  Papers (110)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (657 KB) | HTML iconHTML

    In a typical data center, less than half the energy consumed is delivered to the compute load, with the rest lost in power conversion, distribution and cooling. Traditionally power distribution is at 400/480 V AC in data centers and at -48 V DC in telco facilities. Higher voltage DC has been proposed as an energy efficient distribution option for both types of facilities, and this paper presents a... View full abstract»

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  • One year operation of a 9 kW HVDC UPS 350 v at Gnesta municipality data center

    Publication Year: 2007, Page(s):40 - 45
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB) | HTML iconHTML

    The municipality of Gnesta, Sweden will in the future offer triple-play internet broadband services to its inhabitants. In the past the IT Service Department of Gnesta used small AC UPS of different ages to cope with the need for uninterruptible power backup at the data centre to match the reliability of telecommunications. Battery maintenance became a burden and they also found that this solution... View full abstract»

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  • Effect of breaking high voltage direct current (HVDC) circuit on demonstrative project on power supply systems by service level in Sendai

    Publication Year: 2007, Page(s):46 - 51
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB) | HTML iconHTML

    A high voltage direct current (HVDC) system (300 V) was used for a demonstrative project on power supply systems by service level in Sendai, Japan, entrusted by the New Energy and Industrial Technology Development Organization (NEDO). In high-quality DC power systems, the existing DC protection devices, such as the fuse and the Molded Case Circuit Breaker (MCCB), cannot conduct quick and stable ci... View full abstract»

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  • Session 5: Converters and control techniques

    Publication Year: 2007, Page(s): 52
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