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Computer Applications in Power, IEEE

Issue 1 • Date Jan. 2001

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Displaying Results 1 - 10 of 10
  • Power system restoration methodologies and implementation strategies [Book Review]

    Publication Year: 2001 , Page(s): 58 - 59
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    Freely Available from IEEE
  • Improving industry-university interactions for meaningful R and D

    Publication Year: 2001 , Page(s): 7 - 9
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  • Data management for the electricity market

    Publication Year: 2001 , Page(s): 35 - 38
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (504 KB) |  | HTML iconHTML  

    Electricity markets provide economic signals that encourage network utilization to be maximized. This environment is encouraging network owners and operators to ensure that limits are consistent with actual system conditions. The National Electricity Market Management Company Limited (NEMMCO) is a government agent placed between market participants (generators and retailers) with the roles to manage the electricity market, maintain power system security, and coordinate power system planning. Currently, the eastern Australian states of Victoria, New South Wales, Queensland, and South Australia are involved in the market. Power system security and coordination of power system planning for electricity markets involve various power system analyses being done by NEMMCO and market participants. Efficiency of the data preparation for analysis and consistency and transparency of the data are important issues. A software system called the Operations and Planning Data Management System (OPDMS) is being developed to support planning and operations functions in the electricity market environment. One of its key features is the automated preparation of input data files for load flow and transient stability studies using the PSSE analysis package. These data files are generated from real-time power system data and, therefore, allow accurate analysis of actual system conditions. OPDMS improves NEMMCO's ability to develop limits that are consistent with actual system conditions View full abstract»

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  • Assessing the reliability of distribution systems

    Publication Year: 2001 , Page(s): 44 - 49
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB) |  | HTML iconHTML  

    Since a typical distribution system accounts for 40% of the cost to deliver power and 80% of customer reliability problems, distribution system design and operation is critical for financial success and customer satisfaction. To address this situation, Commonwealth Edison is integrating reliability assessment techniques into distribution planning and engineering. Just as equipment loading and voltage regulation are treated with analytical rigor with power flow models, interruptions and outages can be treated with analytical rigor with reliability models. This is made possible through the use of predictive reliability assessment tools that are able to predict customer reliability characteristics based on system topology and component reliability data. Reliability software predicts expected interruption frequencies and duration in a manner analogous to current and voltage evaluations in traditional power flow models. This article describes the distribution system's reliability assessment model jointly developed by Commonwealth Edison and ABB. This effort modeled, calibrated, and assessed the reliability of more than 3300 feeders. After completing the model, an intelligent system was used to automatically identify potential reliability problems and recommend reliability improvement projects based on expected benefits and costs View full abstract»

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  • Toward self-healing energy infrastructure systems

    Publication Year: 2001 , Page(s): 20 - 28
    Cited by:  Papers (80)  |  Patents (3)
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    Virtually every crucial economic and social function depends on the secure, reliable operation of energy, telecommunications, transportation, financial, and other infrastructures. However, with increased benefit has come increased risk. As they have grown more complex to handle a variety of demands, these infrastructures have become more interdependent. This strong interdependence means that an action in one part of one infrastructure network can rapidly create global effects by cascading throughout the same network and even into other networks. Moreover, interdependence is only one of several characteristics that challenge the control and reliable operation of these networks. These characteristics, in turn, present unique challenges in modeling, prediction, simulation, cause-and-effect relationships, analysis, optimization, and control. Deregulation and economic factors and policies and human performance also affect these networks. The Complex Interactive Networks/Systems Initiative (GIN/SI) is a joint program by the Electric Power Research Institute (EPRI) and the US Department of Defense (DOD) that is addressing many of these issues. The goal of the 5-year, $30 million effort, which is part of the Government-Industry Collaborative University Research (GICUR) program, is to develop new tools and techniques that will enable large national infrastructures to self-heal in response to threats, material failures, and other destabilizers. Of particular interest is how to model enterprises at the appropriate level of complexity in critical infrastructure systems View full abstract»

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  • Object request brokers for distributed measurement

    Publication Year: 2001 , Page(s): 50 - 54
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (476 KB) |  | HTML iconHTML  

    The number of the measured parameters in a power plant is enormous, and the measurements are distributed all over the plant. Some must be measured at one site and used in other sites, and some must be measured and used in specific online demands. This article introduces components of distributed measurement systems, analyzes the framework of a system that was built at Southeast University, and focuses on specific power industry applications of the system. Examples include the application to a boiler accessory device strain test, the real-time query of the measured parameters of the generators and their auxiliary devices, and online video viewing of the monitored sites in a power plant's distributed environments View full abstract»

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  • Power systems engineers in the restructured utility industry

    Publication Year: 2001 , Page(s): 10 - 12
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    The author examines the role of the power system engineer within the developing scenario of utility industry restructuring, in this rapidly changing system of energy, gas and electric delivery to home, commerce and industry. He accomplishes this by examining a few trends that are currently developing View full abstract»

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  • Effective electricity market simulators

    Publication Year: 2001 , Page(s): 29 - 34
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (316 KB) |  | HTML iconHTML  

    The paper outlines the needs of the participants in deregulated electricity markets which are quite different for each participant. The paper then describes operating training simulators, multiple area control operator training simulators, generic control center models, and the transition to market-based operations. Generation company models, energy service company models, market administration models and ISO models are outlined. An outline structure of an electricity market simulator and its realisation discussed. The benefits of a market simulator are also discussed View full abstract»

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  • Submarine cable cathodic protection

    Publication Year: 2001 , Page(s): 39 - 43
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    Corrosion is a significant problem for underwater structures, particularly in environments where there are conditions that accelerate corrosion such as stray electrical currents. The New York Power Authority (NYPA) is concerned about corrosion on their 345 kV submarine cable that runs across Long Island Sound and brings 690 MW of power to the 2.6 million people on Long Island, New York. In 1994, a team of NYPA engineers and consultants was formed to analyze the effects of corrosion on the power circuit. Ultimately, a specially designed corrosion protection system was installed to mitigate corrosion on the cables. The corrosion protection system includes a unique monitoring and control system that regulates the protection and provides feedback for the corrosion system performance. A system of reference electrodes and a current density sensor in the water is used. The system self-corrects for the voltage shift between the land-based drainage point and the location where protection is applied. Features of the computer-controlled corrosion protection system are described in this article View full abstract»

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  • NERC and the new millennium

    Publication Year: 2001 , Page(s): 12
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