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Telecommunications Energy Conference, 1996. INTELEC '96., 18th International

6-10 Oct. 1996

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Displaying Results 1 - 25 of 127
  • Proceedings of Intelec'96 - International Telecommunications Energy Conference

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (956 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 1996, Page(s):xvii - xviii
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    Freely Available from IEEE
  • Powering the mobile base stations

    Publication Year: 1996, Page(s):213 - 219
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (542 KB)

    The paper describes the impact of the mobile communication market on power equipment/systems such as power level, size, modularity; operating temperature and equipment functions. Trends on major technical characteristics are discussed and illustrated by some product examples. The paper also discusses front end systems and DC/DC converters. View full abstract»

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  • AC, noise and migration in the battery installations

    Publication Year: 1996, Page(s):792 - 798
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    In this paper AC current ripple during float, charge, and discharge of a battery string are presented and analyzed. The effect of AC power dissipation on battery temperature and the simple method of its calculation is discussed. Laboratory experimentation was conducted in order to establish the AC power loss characteristics and its variation with frequency. The typical AC common mode waveforms for... View full abstract»

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  • Measuring the internal resistance of a cell in assembled batteries

    Publication Year: 1996, Page(s):784 - 791
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    The condition of a valve-regulated lead-acid battery can be evaluated by measuring the internal resistance, impedance, or conductance. When the internal resistance of a cell in assembled batteries in active service is measured, however, the measured value is often smaller than the actual value because a portion of the measuring current flows into other cells or equipment connected to the cell. Thi... View full abstract»

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  • Remote integrated power systems for new telecommunication system deployment

    Publication Year: 1996, Page(s):398 - 403
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Optical fiber telecommunication systems and other new technologies are being deployed at an ever increasing pace in the local loop of the telecommunications network. This rapid, worldwide, deployment has raised many issues in the powering these new products and services because the requirements are often quite different from the traditional centralized power system. Because of the wide range and d... View full abstract»

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  • Establishing a remote monitoring system to enhance power system reliability

    Publication Year: 1996, Page(s):94 - 98
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Reliability of power service to remote telecommunication transmission sites is critical to overall system reliability. It is an accepted fact that power system reliability can be enhanced by: regular maintenance; regular exercise of standby generator sets under load; and by fast service when problems arise. Serial communication networks can enhance these efforts, but implementing network communica... View full abstract»

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  • The new Russian standard for telecom power supplies

    Publication Year: 1996, Page(s):781 - 783
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    A necessity to regulate the parameters of telecommunications equipment power supply and to develop appropriate national and international standards is generally recognized. Activities which telecommunications administrations and leading companies of western countries carry out in this direction is stimulated by the fact that as a result of demonopolization performed in the field of telecommunicati... View full abstract»

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  • Powering choices for emerging networks a systems engineering perspective

    Publication Year: 1996, Page(s):391 - 397
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The powering voltage and frequency used in hybrid optical fiber-coaxial telecommunication networks impacts to different degrees on system efficiency, safety, reliability and response to parasitic currents. Power selection is consequently a system issue and cannot be based on any one factor. This paper examines the relationships between telecommunication network performance and powering parameters.... View full abstract»

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  • Powering of remote node locations using flywheel energy storage

    Publication Year: 1996, Page(s):662 - 667
    Cited by:  Papers (3)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The telephone industry has long used lead acid batteries for back-up power to provide uninterruptible service. As an alternative to this approach, SatCon Technology Corporation has developed a flywheel energy storage system (FESS) specifically designed as a “plug for plug” replacement for batteries in telecommunications remote powering applications such as vaults, huts and cabinets. Th... View full abstract»

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  • Power plants monitoring system for wide-area maintenance in Japan

    Publication Year: 1996, Page(s):88 - 93
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    An integrated operation system for the maintenance of telecommunications power equipment called ALICE was first developed and introduced in 1989. The system has since been implemented throughout Japan with enhanced and expanded functions. This report presents the configuration, design concept, and functional outline of a wide-area monitoring system that further centralizes ALICE and achieves even ... View full abstract»

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  • Electrical safety, cost and the consequences

    Publication Year: 1996, Page(s):777 - 780
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Ericsson develops total telecommunication solutions for customers in more than 100 countries throughout the word. The ability to handle large amounts of information uninterruptedly via telecom networks requires an assured and reliable power supply system. This applies to all types of networks: public, cellular or private. The Energy Systems Division develops and markets energy systems that meet th... View full abstract»

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  • Power supply system for high-speed broadband telecommunications equipment in a central office

    Publication Year: 1996, Page(s):383 - 390
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The authors have developed a new broadband telecommunication power supply system which is configured in three cabinets as compared with a conventional six-cabinets system. To minimize the size of the system and reduce power losses, forced-air cooling and zero-voltage switching power conversion circuits have been applied to rectifier units and voltage compensation units. Additionally, to reduce the... View full abstract»

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  • On-line battery testing: a reliable method for determining battery health?

    Publication Year: 1996, Page(s):654 - 661
    Cited by:  Papers (16)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Pb-acid battery testing is based upon measuring the electrical response of a cell in a battery to an applied test signal. The intended result is to determine the cell's state of health from the measured response. Such testing represents a faster, less expensive alternative to load-cycle testing, which is the most accurate way to measure the capacity of a battery. Recognizing this, many companies h... View full abstract»

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  • Integrated environmental, security, power monitoring and control in telecommunication remote sites

    Publication Year: 1996, Page(s):82 - 87
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    Power systems monitors controllers (PSMCs) are already widely used by provisioning, maintenance and surveillance people. They offer many advantages. However, PSMCs can be used in broader applications and yield additional returns to the customers. This paper describes the many benefits of integrating environmental and security functions into the standard PSMCs, in remote sites such as controlled en... View full abstract»

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  • A structured DC power modernisation programme for the BT core network

    Publication Year: 1996, Page(s):769 - 776
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The paper describes the issues involved in setting up a structured DC power modernisation programme to replace the old centralised power plant in service at a large number of the key switching centres in the BT core network. The paper considers not just the very important technical issues that need to be addressed before such a significant multi-million pound investment as this is implemented, but... View full abstract»

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  • Powering the local telecommunications network

    Publication Year: 1996, Page(s):376 - 382
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    This paper reviews various powering alternatives for local telecommunications networks comprising copper wires, coaxial cable and optical fibers. It then examines the ongoing evolution of wired and wireless public networks, and the expectations for telecommunications at the beginning of the 21st Century. It concludes with recommendations for efforts of the telecommunications power industry to best... View full abstract»

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  • Single-stage series resonant power factor correctors

    Publication Year: 1996, Page(s):242 - 247
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper considers the following questions: (1) the impact of the type of frequency control on the characteristics of the resonant power factor corrector (RPFC); (2) the features of RPFC with the combined regulation of the control frequency and interval when the energy is transferred to the load; (3) the influence of the high frequency current form factor on the power factor (PF); (4) the impact... View full abstract»

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  • The experience of a UPS company in advanced battery monitoring

    Publication Year: 1996, Page(s):646 - 653
    Cited by:  Papers (8)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    With the merging of computer telecommunication technologies, and “multimedia”, uninterruptible power supplies (UPS), already widely used to protect the computer networks and to guarantee service continuity to their users, should certainly be viewed as a reliable and cost effective solution to assure protection and battery back up to telecommunication infrastructure, private, or public.... View full abstract»

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  • Communication architectures for centralized monitoring and control of power equipment

    Publication Year: 1996, Page(s):76 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    In the past, on-site or roving personnel monitored and repaired power equipment. Today, to increase efficiency and reduce costs, there is a trend to monitor equipment from a centralized maintenance location. This location is responsible for monitoring all the equipment sites, responding to alarms, and scheduling service and repair as needed using the most appropriate service personnel. The telecom... View full abstract»

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  • PID controller implementation in numerical simulation program applied to the power static converter

    Publication Year: 1996, Page(s):764 - 768
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    This paper presents the analysis and implementation of an algorithm for numerical simulation applied to static power converter, using PWM modulation and PID (proportional integral derivative) controller. A buck power converter prototype is designed and the experimental results are compared to those of the simulation View full abstract»

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  • Survey of rotary uninterruptible power supplies

    Publication Year: 1996, Page(s):416 - 419
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Uninterruptible power supplies (UPS) for early warning radar systems, computer centers, and other critical loads, were first introduced as motor generator sets with flywheels and engines. Since that time, solid state UPS have been developed to a high degree in a wide range of sizes and have largely supplanted rotary uninterruptible power systems. There has been a renewed interest in rotary UPS as ... View full abstract»

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  • Analysis and design of broadband power systems

    Publication Year: 1996, Page(s):367 - 375
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    Broadband network powering is somewhat different from powering traditional telephone systems. One major difference stems from the distributed nature of broadband network powering that results in bus-type networks used to energize constant-power loads. As traditional methods of powering telecommunication networks are replaced by more distributed approaches such as broadband, maintaining the present... View full abstract»

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  • Obtaining a frequency dependent and effect distributed model of magnetic components from actual measurements

    Publication Year: 1996, Page(s):499 - 506
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The behavior of the magnetic components in high frequency switched power supplies depends significantly on the working frequency due to distributed magnetic and electrical field effects. Measurement equipment such as an impedance analyzer usually offers simple equivalent models which allow characterization of the frequency behavior of some magnetic components. However it is useful to have a proced... View full abstract»

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  • Intelligent energy saving power system control of telecom DC power plant

    Publication Year: 1996, Page(s):234 - 241
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    This paper presents the design of intelligent energy saving power system controller (IESPSC) in a DC power plant of Korean Telecommunications. From past experience, rectifiers for telecom DC power plants have been very inefficient at light loads. The proposed control scheme offers a “novel load sharing” approach based on the knowledge of each unit's efficiency in parallel rectifiers. N... View full abstract»

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