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14th International Conference and Exhibition on Electricity Distribution. Part 1. Contributions (IEE Conf. Publ. No. 438)

1997

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  • eaNSF: a simulation tool for evaluating strategies

    Publication Year: 1997, Page(s):26/1 - 26/5 vol.6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    EA Technology's Network Simulation Facility, eaNSF, has been developed for the Regional Electricity Companies as a PC program to provide a common basis for the economic and strategic evaluation of commercial and technical developments which depend intrinsically upon the capability or performance of the distribution network. Such developments may be phased over a period of years and need to be cons... View full abstract»

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  • INTFO: corporation integrated multimedia intelligent assistant for field operators. An overview [power system control]

    Publication Year: 1997, Page(s):11/1 - 11/5 vol.6
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB)

    The INTFO project aims at developing a flexible multimedia application running cooperatively on corporate information systems and on portable (mobile) personal computers to organize and improve the efficiency of power system operators performing every-day activities in the field. It will help: electric utility company operation managers to organise and distribute the necessary tasks between the op... View full abstract»

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  • Dynamic resource planning applied to distribution transformers

    Publication Year: 1997, Page(s):25/1 - 25/4 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    The large number of currently installed distribution transformers in Iberdrola-nearly 90,000 units-and the wide range of output rates, primary voltages, secondary voltages, types of dielectric, class of cover-passes, etc. into which these transformers can be subdivided, has to date made it very difficult to optimise the number of standby transformers and procurement of new units. This situation is... View full abstract»

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  • PREINV: a comprehensive tool for network installations planning

    Publication Year: 1997, Page(s):10/1 - 10/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (572 KB)

    This paper presents a methodology of a supportive application developed by Iberdrola and Software AG Espana to evaluate, compare and select different power system investment alternatives. The application integrates electric concepts like load flow solutions for radial networks, power losses and reliability analysis with economic variables like development costs, interest rates, life expectancy, et... View full abstract»

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  • Present status in applying mathematical planning methods in AM/FM-GIS systems

    Publication Year: 1997, Page(s):24/1 - 24/5 vol.6
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    In the study described in this paper, 18 commercial distribution network information systems were reviewed and their mathematical and heuristic planning methods studied. Several useful and well tested planning methods are applied in commercial software. No product is perfect in this respect, however. Public information, introduced e.g. in this paper about these features may induce power distributi... View full abstract»

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  • Selection of distribution transformer based on economic criteria

    Publication Year: 1997, Page(s):14/1 - 14/5 vol.6
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    This paper presents considerations related to the loss of life calculation and to the determination of the distribution transformers loading, with technical and economical considerations and applying daily load curves obtained from measurements in typical transformers. Loss of life estimation is done applying probabilistic daily load curves and their probability of occurrence. The transformer load... View full abstract»

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  • Heuristic methods for the optimisation of MV distribution networks operation and planning

    Publication Year: 1997, Page(s):9/1 - 9/5 vol.6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    Most MV power distribution networks are normally operated radially. However, more or less, there are always interconnecting facilities between adjacent feeders of the same or neighboring HV/MV substations. The facilities of modern distribution control centres enable the maximum exploitation of the existing MV networks by proper selection of their configuration. An effective reconfiguration strateg... View full abstract»

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  • Integrated resources planning at CEB-Brasilia city utility

    Publication Year: 1997, Page(s):5/1 - 5/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    Due to the fact that CEB electric utility (Brazil) depends almost totally on external generation, buying 95% of the energy that it distributes, the development of studies that compare the supply options with load management alternatives is of large interest. This dependency makes the utility vulnerable to the institutional changes in the Brazilian electric sector and even concerning the oscillatio... View full abstract»

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  • The new procedure to support investments plans in ENEL MV distribution

    Publication Year: 1997, Page(s):23/1 - 23/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The report describes the new control techniques used by ENEL in defining investments for MV distribution networks to meet the load growth, to improve the supply quality and the network performance and to solve critical situations due to plants obsolescence or to environmental problems. To fulfil the above mentioned goals new software, was introduced that makes use of a suitable set of indices, pro... View full abstract»

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  • Simplification of medium voltage networks versus a higher degree of guarantee

    Publication Year: 1997, Page(s):34/1 - 34/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    The Universal Fair of Seville, popularly know as EXPO'92, took place from April to October 1992. The land situated on the “Isla de la Cartuja” was built on and inhabited for this event, and two HV/MV substations were built to supply the MV/LV centres via a 20 kV underground network. These centres supplied electricity to the pavilions that were erected, and the installations of associat... View full abstract»

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  • New considerations for distribution network planning and design

    Publication Year: 1997, Page(s):1/1 - 1/5 vol.6
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    In many parts of the world, the advent of electric utility de-regulation will drive fundamental changes in the design, operation, and planning of distribution networks. Distribution network planning will be much more business-oriented, and profitability will be the emphasis in all investments and operating decisions. To improve system profitability, a variety of new technologies will be considered... View full abstract»

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  • Load flow calculations on distribution networks by using a statistical approach

    Publication Year: 1997, Page(s):13/1 - 13/5 vol.6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    The availability of automatic informative systems containing all information on the networks as well as of the consumptions of the users and at the same time the knowledge of the typical load curves makes load flow calculations easier in statistical terms. This allows design of an enhanced calculation methodology to be used to check the compliance with the technical constraints in probabilistic te... View full abstract»

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  • Reliability of medium voltage primary substation structures

    Publication Year: 1997, Page(s):17/1 - 17/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    One of the top priorities of EDF's (France) corporate strategic plan is to improve the quality of electricity supplies. A main area of planned progress is the reduction in the frequency of major outages in densely populated urban areas which arise from the total or partial loss of primary substations. This paper describes how, since 1991, work has been undertaken with a view to improving the relia... View full abstract»

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  • Voltage control in medium-voltage distribution networks

    Publication Year: 1997, Page(s):42/1 - 42/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    Voltage control becomes increasingly important in medium-voltage distribution networks. A new tool to optimise voltage control in the medium-voltage distribution network and thus enable utilities to obtain, maintain and guarantee systematically an optimal quality of supply has been developed. This paper describes both the methodology to optimise voltage control and the experiences at MEGA Limburg,... View full abstract»

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  • Towards new challenges for distribution system planners

    Publication Year: 1997, Page(s):I1/1 - I1/3 vol.6
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    The aim of this contribution is to look forward to the new challenges facing the system planners in general, and the distribution system planners in industrialized countries in particular. These challenges are caused by technical factors but also by the institutional changes which are taking place nowadays. The author does not intend to propose solutions, but rather to initiate a discussion around... View full abstract»

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  • Improvement of quality service in Uruguay-plans developed and its results in the period 93-95. Fault statistic as a parameter of measurement

    Publication Year: 1997, Page(s):19/1 - 19/6 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    The present paper aims to describe the improvement process of the quality of the product and the technical service that has been undertaken by the UTE electric utility (Uruguay) since 1990 and to show the obtained results so far as well as the actions foreseen in the future. It develops the institutional framework and the countrywide context in which the activity of UTE is developed. The current s... View full abstract»

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  • ENEL's DSM actions in the international scenario

    Publication Year: 1997, Page(s):29/1 - 29/5 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (568 KB)

    In the framework of national policies, which, since the end of the 1970s have had the target of making consumers rationally use natural sources, in particular energy, and in the pursuit of environmental goals, the Governments and the utilities have driven several DSM actions in many countries. The activities implemented by ENEL have included the analysis of the different components of the energy d... View full abstract»

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  • A software based design methodology for the design of low-cost electrical reticulation networks

    Publication Year: 1997, Page(s):8/1 - 8/3 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    In South Africa, the challenge of the early 21st Century is to extend the supply of grid electricity to many of the currently unelectrified urban and rural households. As part of the recently elected government's reconstruction and development plan, the intention is to electrify 500,000 households per year for the next 10 to 15 years. This paper describes a research and development project being u... View full abstract»

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  • Visions of future distribution systems

    Publication Year: 1997, Page(s):4/1 - 4/4 vol.6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    A future vision of the electrical transmission and distribution system is discussed in this paper. The content is based on the results from the ELFORSK project-Vision 21 performed during 1995-1996, where over 100 creative ideas were received from 45 participators. The visions are describing both system aspects, new business concepts, advanced components and customer services 20-30 years ahead. Thi... View full abstract»

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  • SISPIR: an integrated system for multi-stage investment plan selection and scheduling in an electric distribution network

    Publication Year: 1997, Page(s):22/1 - 22/4 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (248 KB)

    The selection, for a later development, of an important set of investments between the total set of investment opportunities from an electric utility company in front of all kind of limitations that can exist in it, presents a great complexity decision problem, difficult to solve with success without the help of as much the necessary financial knowledge, as the adequate operational research techni... View full abstract»

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  • Strategy for the renewal of 110 kV substations

    Publication Year: 1997, Page(s):33/1 - 33/6 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (492 KB)

    Under the impression that there would be high load increases and the target levels of service reliability should be ensured, the German utility Hamburgische Electricitats-Werke AG (HEW) of the city-state of Hamburg constructed a large number of 110 kV substations between 1950 and 1970. Given the specific age structure of the substations and the current state of the electrical equipment in use, HEW... View full abstract»

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  • Deregulation-challenges and impacts for planning and documentation

    Publication Year: 1997, Page(s):I2/1 - I2/3 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    In a deregulated electricity distribution the network business and energy business are separated from each other. Free competition exists in the energy business but the network business will still at least temporarily remain monopolistic and regulated by a government authority (“regulator”). An essential feature of the transfer tariff in distribution networks is that it is independent ... View full abstract»

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  • Supply quality in planning of MV networks

    Publication Year: 1997, Page(s):41/1 - 41/4 vol.6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    Improving the daily quality of delivery and gaining control over large scale failures that occur on the network, while mastering investment costs, are two key sectors of the quality policy of EDF for the period 1995-2005. As medium voltage networks play an extremely important role in electricity supply, it appeared essential to develop a planning tool enabling the operator to make strategic choice... View full abstract»

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  • Reliability indices estimation of unstationary distribution networks

    Publication Year: 1997, Page(s):27/1 - 27/4 vol.6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    The paper presents an efficient and overall analytical approach towards the prognosis of reliability indices in the process of development of medium voltage city distribution networks. The presented model gives possibility for estimation of duration of the interruption of supply of the load points in question, due to unexpected failure at some, arbitrarily chosen, element of radial distributive ne... View full abstract»

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  • Distribution planning with fuzzy loads and independent generation

    Publication Year: 1997, Page(s):12/1 - 12/5 vol.6
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    The classical long range distribution network planning problem consists on deciding network investments to meet future demands at a minimum cost, while attending technical constraints. The decisions whether to construct or reinforce substations and branches lead to a mixed integer programming problem with a great number of decision variables. Besides, the network injections have a fuzzy nature on ... View full abstract»

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