International Conference on AC and DC Power Transmission

17-20 Sep 1991

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Displaying Results 1 - 25 of 77
  • Commissioning of the Pacific HVDC Intertie expansion project

    Publication Year: 1991, Page(s):183 - 187
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    The Pacific Intertie was expanded in 1989 to a 3100 A, +/- 500 kV four converter bipolar parallel arrangement. The authors discuss the various aspects of commissioning of the link. This includes the planning, HV equipment energisation, fault testing, performance testing and the instrumentation used View full abstract»

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  • Design studies for the S. Tome' nack-to-back HVDC converter

    Publication Year: 1991, Page(s):177 - 182
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The Sato Tome' back-to-back converter is planned as the second HVDC link to asynchronously connect the Argentina (50 Hz) and Brazil (60 Hz) transmission systems. From the date of commissioning to the year 1996, the S. Tome' converter will be connected to the respective AC networks via single AC ties. In 1996, plans call for a second 132 kV line on the Argentina side, thereby interconnecting the tw... View full abstract»

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  • System performance and basic design aspects for the Etzenricht 600 MW back-to-back HVDC converter station

    Publication Year: 1991, Page(s):171 - 176
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The cooperation between Bavaria in Germany and Czechoslovakia in the area of energy exchange has been established for many years. This cooperation has been increased significantly, at the end of 1988 by an agreement for mutual energy assistance and electric energy exchange especially with regard to reduced air pollution. This exchange of energy will be carried out interconnecting both asynchronous... View full abstract»

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  • A study of ±500 kV, 2400 MW compact converter station

    Publication Year: 1991, Page(s):165 - 170
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    Consolidated Edison has been involved in a number of research projects aimed at the development and demonstration of HVDC equipment for use in urban environments. The most notable of these projects has been the installation, in conjunction with EPRI, of a compact HVDC station in Astoria, New York. The Astoria experiment was recently concluded. Here , the authors describe how, as part of Consolidat... View full abstract»

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  • The single European energy market: the electricity supply sector

    Publication Year: 1991, Page(s):60 - 62
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    The completion of the internal market in the Community by the end of 1992 has become a key objective and the focal point of the revival of the European Community. Within this overall objective, the development of the single European energy market, the internal energy Market, is a major element. Here, the author has attempted to give the background to the development of the internal energy market. ... View full abstract»

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  • HVDC valve with light-triggered thyristors

    Publication Year: 1991, Page(s):159 - 164
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (408 KB)

    In high voltage direct current (HVDC) applications, the AC/DC thyristor power converter is subjected to very high voltages and each valve in the converter bridge must be able to withstand several hundred kV. As the voltage capability of a single thyristor is limited to less than 10 kV. Necessary firing and protection facilities at the thyristor level must therefore be energized by current coming f... View full abstract»

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  • The structure and operation of the privatised UK electricity supply industry

    Publication Year: 1991, Page(s):55 - 59
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    The National Grid Company has just over a years experience in running the England and Wales Grid System as a plc in a market led environment. The industry has been restructured for privatisation with NGC Holdings, owner of NGC plc, being jointly owned by the 12 Regional Electricity Companies. The successful flotation of the 12 Regional Electricity Companies at the end of 1990 included the business... View full abstract»

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  • A study of a ±500 kV, 2400 MW compact converter station

    Publication Year: 1991, Page(s):153 - 158
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    For many years now Cigre has been collecting operating data on existing HVDC systems and periodically publishing updates of that material to the benefit of the entire industry. Recently a utility survey was made of HVDC projects operating worldwide. With the information on these additional important factors, the Cigre data will be more informative and provide increased practical value. This paper ... View full abstract»

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  • Reactive compensation using static VAR compensators-a planning case study using security constrained techniques

    Publication Year: 1991, Page(s):50 - 54
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (276 KB)

    Optimal power flow programs have been widely advocated for voltage performance planning. The National Grid Company (NGC), however, has found that they do not yet address the particular problems encountered on its transmission system. The author illustrates the nature of these problems which require the use of security constrained techniques and describes a method which has enabled a practicable mi... View full abstract»

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  • The integration of new valves and controls to Nelson River HVDC Bipole 1

    Publication Year: 1991, Page(s):147 - 152
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB)

    The Nelson River HVDC transmission system in Manitoba presently consists of two bipoles. Bipole 1 has a rating of 1670 MW at ±463 kV and transmits this power from the northern terminal at Radisson Station over a distance of approximately 900 km to the Dorsey terminal near Winnipeg. Bipole 2 has a rating of 1800/2000 MW at ±500 kV and transmits this power from the Henday Station, some... View full abstract»

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  • Planning and design studies for the far North Queensland Georgetown and Normanton AC transmission scheme

    Publication Year: 1991, Page(s):44 - 49
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB)

    In Australia remote areas of Far North Queensland have relied for many years on small local diesel powered stations for electricity supply. This is about to change with the commencement of construction by the Far North Queensland Electricity Board (FNQEB) of a transmission line and substations to this region. Work is planned to be completed by mid 1992 . The authors describe planning studies for t... View full abstract»

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  • Integrating optical communications within the power network-the practice

    Publication Year: 1991, Page(s):211 - 219
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (588 KB)

    Because of the availability of `all dielectric self supporting optical cables' (ADSS) offering secure interface free operation, some power utilities are now installing various forms of optical communications on their overhead transmission network, weather on AC of DC lines, for both power system control and general telecommunications duty. Based on successful trials on ADSS systems on overhead lin... View full abstract»

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  • Progress on the New Zealand HVDC upgrade

    Publication Year: 1991, Page(s):138 - 146
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    The upgrading of the existing 600 MW New Zealand DC transmission link to the 1240 MW `DC Hybrid Link' is currently one of the largest capital, infrastructure investment projects in New Zealand. The unique approach to contractual arrangements, project management and technical management of the project is outlined as these are all important areas for any organisation contemplating significant invest... View full abstract»

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  • Planning of the Gulf States interconnection

    Publication Year: 1991, Page(s):38 - 43
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors deal with the planning studies that were carried out to determine the feasibility and nature of an interconnection of the Gulf States. The interconnection project is foreseen to be developed in three phases. The authors give a description of the member systems including generating capacity and transmission facilities. The integration of these facilities is discussed in terms of four di... View full abstract»

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  • Selection of design parameters of equipment for 800 kV transmission systems in India

    Publication Year: 1991, Page(s):235 - 240
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    In Indian generation program for the near future envisages installation of large generating stations with a capacity ranging from 2000-2500 MW. The existing voltage level of 400 kV would be inadequate for the evacuation and transport of power from these stations. In 1989 it was therefore decided that 800 kV should be the next AC transmission voltage in the country. At the same time, steps were tak... View full abstract»

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  • Interconnection of a large hydro power plant via HVDC and AC links with two remote grids

    Publication Year: 1991, Page(s):96 - 101
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors describe the analysis of electromechanical transients in a large hydroelectric power plant interconnected via HVDC and AC links with two separate power systems. The investigation shows the dynamic behaviour of the total interconnected system on occurrence of faults in the HVDC and AC links. Special emphasis is given to the control of frequency deviations, damping of power swings and pr... View full abstract»

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  • Transmission line fields

    Publication Year: 1991, Page(s):194 - 199
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    The electric and magnetic fields under 400 kV overhead lines in the UK have typical maxima of 11 kV/m and 32 A/m (40 μ T, 400 mG). The research programmes in the UK, and other countries are briefly described. The author discusses the gross effects on the body of fields, personal dosimetry, epidemiological studies and biological studies. Although some studies suggest an association between expos... View full abstract»

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  • Economic efficiency, independent power producers and wheeling

    Publication Year: 1991, Page(s):73 - 78
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    Traditionally, electric utilities have sought to decrease the cost of production by such means as merit order running of machines, by improving equipment efficiency, by fuel mix, by interconnection and exchange of cheap energy, and by unit participation and firm purchase and sale contracts for long term savings. The author discusses some of the costs that, under the anticipated US modus operandi, ... View full abstract»

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  • Stability and safety margins of a weak station within a multiterminal HVDC system

    Publication Year: 1991, Page(s):108 - 113
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    Interaction with inverters at AC power systems with low relative short-circuit capacity have been summarized recently. In a multiterminal HVDC system an inverter station which is weak in rated power, in the short-circuit-ratio, or both, poses some even more difficult problems. The authors examine the stability and safety margins of weak rated-power invertor operation in HVDC systems, using the res... View full abstract»

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  • Environmental aspects of 800 kV line design in India

    Publication Year: 1991, Page(s):205 - 210
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    The authors discuss the impact of 800 kV lines with respect to ecological and environmental aspects, electrostatic and electromagnetic fields, radio and television interference, audible noise, and associated possible biological effects, on human beings and flora and fauna. In particular the authors discuss tree top clearances of the power lines, electric field effects, and corona performance inclu... View full abstract»

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  • HVMDC: a new concept to feed small loads

    Publication Year: 1991, Page(s):120 - 125
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    Feeding small loads from HVDC transmission lines is a problem that has been investigated by many authors. The high voltage modulated direct current transmission (HVMDC) is a new concept to feed small loads which uses basically the same equipment involved on the conventional HVDC transmission. In this scheme, the DC current is used for transmitting large blocks of power to distant parts while a con... View full abstract»

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  • Small series converter station specification and cost evaluation

    Publication Year: 1991, Page(s):132 - 137
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    Power systems planning studies should consider HVDC alternatives, mainly when long distances are involved. On this context emerges the question about the economical and technical viability of supplying small loads along the lines. Looking for an answer that could orient its planning studies, the authors developed a methodology for the preliminary calculations comprised in a natural commutated seri... View full abstract»

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  • Study of torsional interactions in multi-terminal DC systems through small signal stability analysis

    Publication Year: 1991, Page(s):411 - 413
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (164 KB)

    Turbo-generators can be subjected to negatively damped subsynchronous frequency oscillations caused by the interactions between the generator and the external network. This phenomena is termed as subsynchronous resonance (SSR) and it is well known that series compensated AC lines are the major contributors. In recent years, it has been established that HVDC systems with converter controllers can a... View full abstract»

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  • Harmonic domain representation of thyristor controlled reactors

    Publication Year: 1991, Page(s):404 - 406
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    A new TCR (thyristor controlled reactor) model has been developed by linearising the state equations of the TCR in the harmonic domain. The resulting equations can be interpreted as a harmonic Norton equivalent. They can also be represented in the multiphase harmonic domain frame of reference, where they could combine easily with the frequency dependent admittances of the transmission network and ... View full abstract»

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  • Incorporation of FACTS into transients programs for system simulation

    Publication Year: 1991, Page(s):379 - 383
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    Flexible AC transmission systems (FACTS) concepts rely on a rapidly controlled response to system disturbances. Accurate transient models of the device, the power system in the vicinity and FACTS controls become crucial for system studies. System studies must deploy models which extend beyond the immediate confines of the FACTS device. In other words, the requirement for detailed transient modelin... View full abstract»

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