2000 IEEE ESMO - 2000 IEEE 9th International Conference on Transmission and Distribution Construction, Operation and Live-Line Maintenance Proceedings. ESMO 2000 Proceedings. Global ESMO 2000. The Pow

2000

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  • Restraining devices to counter the migration of HV cables in duct

    Publication Year: 2000, Page(s):78 - 82
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    This paper deals with the development, testing and installation of special devices on Hydro-Quebec's underground high-voltage transmission system which limit the displacement of cables installed in individual ducts. The devices are installed in manholes at the exit and/or entrance to the cable duct. The principle of two inverted cones is used to create a progressive restraining force applied to an... View full abstract»

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  • Branched cable circuits testing: meeting a new challenge

    Publication Year: 2000, Page(s):70 - 77
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    Branched cable circuits and long cables cannot be accurately tested using reflectometry. Therefore, a multi-ended, GPS synchronized measuring system has been developed. This new method is now being introduced to US Utilities to diagnose cables up to 25000 feet in length, and branched cable circuits containing PILC, extruded cables or a combination of both types View full abstract»

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  • IEC/TC78 “live working”: structure, strategy and program of work

    Publication Year: 2000, Page(s):41 - 50
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    This paper summarizes the accomplishments of TC 78 over the last 20+ years, discusses the change in direction taken in 1996 to better serve the global interests and needs of live line working, introduces the Strategic Policy Statement of TC 78, and updates information presented in a previous paper. In addition, the paper lists the publications prepared by TC 78, describes current projects and subj... View full abstract»

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  • Adoption of “live line work” in S.E.C Central Region Branch, Saudi Arabia

    Publication Year: 2000, Page(s):28 - 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1724 KB)

    This paper describes the various phases of activities carried out by S.E.C. Central Region Branch to adopt a live line work network. Bare handwork for the of overhead transmission live line work was adopted after meticulous planning with the development of safety rules, work methods, procurement of customized live line tools, training and launching prior to adoption into the system. The importance... View full abstract»

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  • Reinforcing the overhead distribution network

    Publication Year: 2000, Page(s):273 - 278
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    This article is a progress report on the work that Hydro-Quebec has undertaken on its distribution network. It describes the utility's response strategy aimed at consolidating the entire power system. More specifically, it deals with the structural part of engineering and R&D efforts to reinforce overhead lines and thus boost protection against accidents such as the one that occurred in Januar... View full abstract»

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  • A 100-m high prefabricated concrete pole: why not?

    Publication Year: 2000, Page(s):365 - 374
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The idea of using concrete to make prefabricated poles is not new. The first poles were built around 1856 and they are at present commonly used in several countries. What is really new is that, using high performance concrete technology, it is now possible to make segmental poles or towers of more than 60 m in height that can be erected in one day. The use of 60 to 80 MPa concrete makes possible t... View full abstract»

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  • Safety aspects related to the installation of mobile telephone antennas on HV towers

    Publication Year: 2000, Page(s):163 - 164
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB)

    A few years ago, some cellular and personal communication services (PCS) companies began to install antennas on high voltage towers and asked the telecommunication company to provide wire-line service to their electronic equipment located at the base of these towers. Because high voltage towers may be subject to very high ground potential rise (GPR) during a fault, it is necessary to properly prot... View full abstract»

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  • Preliminary results on the development of a teleoperated compact trolley for live-line working

    Publication Year: 2000, Page(s):21 - 27
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    A new teleoperated trolley for live-line operations in under development at Hydro-Quebec's Research Institute (IREQ). This very compact and lightweight trolley is part of the development of an innovative method for de-icing conductors and overhead ground wires. Many live-line applications have since been identified. Indeed, the second phase of the development of a teleoperated device for cleaning ... View full abstract»

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  • Learning tools for success in the deregulated energy industry

    Publication Year: 2000, Page(s):266 - 272
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    Deregulation is driving rapid and dramatic change in the energy industry. Suppliers, marketers, brokers and customer aggregators alike are trying to develop new business and service models to capitalize on the inherent opportunities. While the concept of communicating and delivering reliable power to customers sounds simple, the authors believe utilities must provide an environment of real-time an... View full abstract»

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  • Live re-stringing of 138 kV lines

    Publication Year: 2000, Page(s):404 - 409
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    This paper reports on research to develop new safe procedures for re-stringing an energized double-circuit 138 kV transmission line. The re-stringing operation requires the installation of a large stringing block and the removal, when necessary, of two insulator units from the string. This alters the worksite withstand characteristics significantly and lowers its insulation level. However, tests h... View full abstract»

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  • Aerial method to mitigate vibration on transmission towers

    Publication Year: 2000, Page(s):187 - 194
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    In December of 1995, during a routine helicopter patrol, it was discovered that the center phase support wing on an “L-Tower” (steel lattice tangent tower) had failed. During restoration and repairs to this tower, and on a subsequent maintenance project, cracks were found in some steel pieces on other towers. Typically, these cracks radiated out from one of the pre-drilled holes on the... View full abstract»

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  • Life safety rope strategies for transmission structures

    Publication Year: 2000, Page(s):211 - 217
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    US electric utilities involved in overhead power delivery may be seeing a subtle shift in old perceptions about the use of life safety ropes and equipment on conductors, transmission towers and line equipment. Line crews form Georgia to Vermont and Maryland to California are beginning to see the value of carrying this equipment in their trucks. They are of a growing number brandishing seemingly ne... View full abstract»

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  • Safety issues related to the connection of MV and HV grounding systems outside substations

    Publication Year: 2000, Page(s):159 - 162
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    In recent years, there has been an explosive growth of mobile telephone systems. In urban areas, antennas are seen on tall buildings and structures. In rural areas, the options are limited and high voltage (HV) towers represent an interesting alternative. Antennas started to appear in HV towers two to three years ago and their number will increase rapidly over the next few years. Different safety ... View full abstract»

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  • Upgrading and refurbishment of an energized transmission line

    Publication Year: 2000, Page(s):11 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    The paper presents the executive procedures and the solutions adopted for special situations, utilizing techniques of work with energized lines-bare hand and hot stick-to upgrade and refurbish to 138 kV, a transmission line (TL) that operated at 69 kV. This TL is located in the industrial area of the Metropolitan Region of the city of Curitiba (RMC), in the state of Parana, Brazil, and radially su... View full abstract»

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  • Underground distribution vaults with environmental control

    Publication Year: 2000, Page(s):259 - 265
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Hydro-Quebec's underground distribution system in urban areas accounts for a total of nearly 2000 transformer vaults. Although all the utility's electrical equipment installed in them is submersible, these vaults are the scene of major operating and maintenance problems. Premature aging of the electrical equipment is also a source of concern, since the vaults do not provide any control over water ... View full abstract»

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  • Mixed-composite modular poles for distribution and transportation of electricity

    Publication Year: 2000, Page(s):358 - 364
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    Many of the existing electrical or telecommunication poles should be replaced. The countries revising their environmental laws are questioning the sustained use of wooden poles because of the fact that poles account for about half of the treated wood sales and the toxic chemicals employed to preserve their longevity. Also, the large number of cables and equipment installed on the poles increase th... View full abstract»

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  • Blackout restoration techniques for Saudi Electric Company-Central Branch

    Publication Year: 2000, Page(s):89 - 93
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper describes the concepts and techniques inserted into the blackout restoration procedure for the complete restoration of the SEC C network (Saudi Electric Company-Central Branch). It addresses (a) the criteria established to ensure satisfactory steady state conditions of frequency, voltage and generator's MVAr loading, (b) the studies made to ensure that transient and steady state conditi... View full abstract»

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  • Raptor electrocutions-emerging issues [overhead power distribution]

    Publication Year: 2000, Page(s):171 - 175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The electrocution of raptors and larger perching birds is a hazard of overhead distribution construction, especially in the Western United States where poles in treeless areas make attractive perches. Disturbed by the continuing large numbers of raptors, particularly eagles, electrocuted along power lines, the US Fish and Wildlife (SFWS) has begun to step up enforcement of the Migratory Bird Treat... View full abstract»

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  • Assessment of safe design tension with regard to Aeolian vibrations of single overhead conductors

    Publication Year: 2000, Page(s):202 - 208
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper presents a probabilistic model for predicting Aeolian vibration response of single overhead conductors. Two different approaches are used to assess safe design tensions. One is based on the conductor fatigue endurance limit and the other is based on linear fatigue damage accumulation associated to each vibration cycle which leads to a certain predicted fatigue life of the conductor. Rec... View full abstract»

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  • Safe work practices for downed conductors adjacent to energized HVDC/HVAC transmission lines

    Publication Year: 2000, Page(s):225 - 229
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    In October 1996, Manitoba Hydro experienced the melting of a stringing dolly during conductor stringing on an isolated and grounded HVDC line during a transient on an adjacent energized HVDC line. This paper describes the work that was taking place and the conditions that led to the failure of the stringing dolly. The results of the subsequent investigation are presented along with the safe workin... View full abstract»

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  • On-line testing of on-load tap changers with a portable acoustic system

    Publication Year: 2000, Page(s):293 - 298
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    Vibro-acoustic diagnostic of on-load tap changers (OLTC) offer numerous advantages: applicable online, sensitive to mechanical as well as electrical malfunctions, retrofitable to old equipment, simple and low-cost. Over the last few years, Hydro-Quebec has spent considerable efforts in the development of a reliable acoustic methods for both monitoring and diagnostics, this paper describes the meth... View full abstract»

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  • Probabilistic assessment of risk associated with mobile telephone antennas on HV towers

    Publication Year: 2000, Page(s):154 - 158
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Mobile telephone base stations sited beneath or adjacent to HV towers require significant risk management consideration. The paper examines the level of shock hazard associated with people moving near a HV tower, and determines the sensitivity of the risk to a range of parameters which might be expected to have significant impact upon the various shock scenarios. High resistivity surfacing materia... View full abstract»

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  • Global ESMO 2000 The Power is in your Hands

    Publication Year: 2000, Page(s):1 - 8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    First Page of the Article
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  • Digital real-time simulation for distribution systems

    Publication Year: 2000, Page(s):252 - 258
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    This paper describes a very convenient tool which can be used by concerned utilities for optimization of their distribution system in the aspects of performance, reliability and power quality. The Hydro-Quebec power system simulator is now a complete digital system thanks to the progress accomplished in the area of real time computation. This digital simulator, called Hypersim, is equipped with an... View full abstract»

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  • Capacity indicator and load measuring system for aerial devices

    Publication Year: 2000, Page(s):397 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    New working techniques on the distribution network, such as transformer lifting and installation, are increasing the need to maximize the capability of aerial devices. Hydro-Quebec's research institute, IREQ, thus developed the Capacity Indicator and Load Measuring System (CILMS) after three years of R&D efforts aimed at increasing the safety of articulated aerial lifts and validating new work... View full abstract»

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