Proceedings of the 37th Annual North American Power Symposium, 2005.

25-25 Oct. 2005

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  • The Proceedings of the Thirty-Seventh Annual North American Power Symposium

    Publication Year: 2005, Page(s): i
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  • The Proceedings of the Thirty-Seventh Annual North American Power Symposium

    Publication Year: 2005, Page(s): ii
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  • Copyright page

    Publication Year: 2005, Page(s): iii
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  • Local Organizing Committee

    Publication Year: 2005, Page(s): iv
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  • Welcome to NAPS 2005

    Publication Year: 2005, Page(s):v - vi
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  • Table of contents

    Publication Year: 2005, Page(s):viii - xv
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  • [Breaker page]

    Publication Year: 2005, Page(s): 1
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  • Maximum loading problems using nonlinear programming and confidence intervals

    Publication Year: 2005, Page(s):3 - 8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1372 KB) | HTML iconHTML

    This paper presents a stochastic non-linear program (S-NLP) with a confidence interval constraint. The problem extends the conventional maximum loading problem to include randomness and uncertainty in system loading levels. The problem restricts the 99% confidence interval of the loading level to be within a pre-specified amount of the mean. The paper presents solutions when the confidence interva... View full abstract»

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  • Remote hardware power system loading studies over the World Wide Web

    Publication Year: 2005, Page(s):9 - 15
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3867 KB) | HTML iconHTML

    This work presents a remote data acquisition and control system that allows students and researchers to perform an experiment using power systems hardware from any location with an active Internet connection. There are four main components for this system: first, the power systems hardware necessary to perform the experiment; second, digital control and data acquisition hardware; third, a software... View full abstract»

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  • Overview of CIM-oriented database design and data exchanging in power system applications

    Publication Year: 2005, Page(s):16 - 20
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1547 KB) | HTML iconHTML

    Historically, databases in power systems were designed for certain applications and not oriented to information-sharing. The isolation among power system applications' databases hinders the development of a universal information infrastructure in the power system industry. To accommodate the trend of software development, the Electric Power Research Institute (EPRl) Working Group on Control Center... View full abstract»

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  • Optimization of power flows in polyphase systems with significant source impedance

    Publication Year: 2005, Page(s):21 - 26
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1125 KB) | HTML iconHTML

    The paper considers optimized compensation of loads in unbalanced polyphase networks under non-sinusoidal operation and with significant source impedance. After formulating the problem in a suitable Hilbert space terminology, the optimal solution is obtained using Lagrange multiplier method. The paper also proposes a general framework for obtaining simplified, reduced-order versions of the optimal... View full abstract»

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  • Value-based implementation of distributed generation in optimal power flow

    Publication Year: 2005, Page(s):27 - 33
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2756 KB) | HTML iconHTML

    Distributed generation (DG) has emerged as a practical and viable technology for alleviating power system shortages related to generation and transmission inadequacies. The market location and coordination of a selected DG technology is of high importance to engineers and power marketers. This paper develops an approach for coordinating DG on a grid/micro-grid and solves the resource allocation pr... View full abstract»

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  • [Breaker page]

    Publication Year: 2005, Page(s): 35
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  • New monitoring and control scheme for preventing cascading outage

    Publication Year: 2005, Page(s):37 - 42
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2677 KB) | HTML iconHTML

    This paper presents a new approach for preventing cascading outage by coordinated system and local monitoring and control scheme. System monitoring evaluates the vulnerability and security of the power system during dynamic changing conditions. It finds the vulnerable power system components indicating that their protective relays need to be monitored closely. Local monitoring can provide the exac... View full abstract»

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  • PRA for vulnerability assessment of power system infrastructure security

    Publication Year: 2005, Page(s):43 - 51
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4100 KB) | HTML iconHTML

    Since September 11, 2001 the security of major national infrastructures has become a critical concern to government and industry. This paper reviews different types of threats (physical and cyber) and sources of these threats in electric power systems, describes the projects undertaken by the government and industry to address the security issues of the power system infrastructure, and presents a ... View full abstract»

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  • Reliability assessment of transformer thermal model parameters estimated from measured data

    Publication Year: 2005, Page(s):52 - 58
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1383 KB) | HTML iconHTML

    This paper presents a methodology to assess the reliability of substation distribution transformer thermal model parameters estimated from measured data. The methodology uses statistical bootstrapping to assign a measure of reliability to the estimated parameters using confidence levels (CL) and confidence intervals (CI). The bootstrapping technique, which is used to make a small data sample look ... View full abstract»

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  • Identification of severe multiple contingencies in electric power networks

    Publication Year: 2005, Page(s):59 - 66
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2249 KB) | HTML iconHTML

    In this paper we propose a two-stage screening and analysis process for identifying multiple contingencies that may result in very severe disturbances and blackouts. In a screening stage we form an optimization problem to find the minimum change in the network to move the power flow feasibility boundary to the present operating point and that will cause the system to separate with a user-specified... View full abstract»

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  • Advanced contingency selection methodology

    Publication Year: 2005, Page(s):67 - 73
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2522 KB) | HTML iconHTML

    This paper describes the development and implementation of contingency ranking and selection algorithms, as part of a power system security assessment program. The work concentrates on performance-index-based algorithms and uses a contingency control variable for precise contingency representation. The ranking is based on the value of the sensitivity of the performance index with respect to the co... View full abstract»

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  • [Breaker page]

    Publication Year: 2005, Page(s): 75
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  • The maximum flow algorithm applied to the placement and distributed steady-state control of UPFCs

    Publication Year: 2005, Page(s):77 - 83
    Cited by:  Papers (12)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1399 KB) | HTML iconHTML

    The bulk power system is one of the largest man-made networks and its size makes control an extremely difficult task. This paper presents a method to control a power network using UPFCs set to levels determined by a maximum flow (max-flow) algorithm. The graph-theory-based max-flow is applied to the power system for UPFC placement and scheduling. A distributed version of max-flow is described to c... View full abstract»

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  • Optimal capacitor placement using branch and bound

    Publication Year: 2005, Page(s):84 - 89
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1438 KB) | HTML iconHTML

    Optimal capacitor placement (OCP) determines the sizing, siting, and switching of capacitors that are added to a radial distribution feeder. OCP seeks to maximize the net dollar savings resulting from the reduction in power and energy losses less the total costs of capacitors. The distribution feeder typically consists of a main branch, some lateral branches, and nodes. Nodes are points on the fee... View full abstract»

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  • Unintentional islanding and comparison of prevention techniques

    Publication Year: 2005, Page(s):90 - 96
    Cited by:  Papers (16)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1688 KB) | HTML iconHTML

    When one or more distributed resources (DR) become isolated from the rest of the power system and inadvertently continue to serve loads separately from the utility system, the condition is known as "unintentional islanding". Utility engineers are seriously concerned about unintentional formation of islands. This is because the utility looses control of the voltage and the frequency during the isla... View full abstract»

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  • Optimal power flow utilizing FPGA technology

    Publication Year: 2005, Page(s):97 - 101
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1640 KB) | HTML iconHTML

    Optimal power flow (OPF) is a performance driven application in energy management systems that is currently performed on high-performance workstations. However, general purpose processors perform poorly due to irregular data structures commonly encountered in power system analysis. We propose the use of FPGA hardware to accelerate floating point performance in the evaluation of OPF. Our results in... View full abstract»

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  • Static synchronous series compensator operation based on 48-pulse VSC

    Publication Year: 2005, Page(s):102 - 109
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1049 KB) | HTML iconHTML

    The aim of this paper is to analyze an original detailed operation of a static synchronous series compensator (SSSC) based on 48-pulse VSC. A 48-pulse VSC configuration is fully presented. Expressions for the derivation of the current signals of the SSSC are exhibited. The procedure to charge or discharge the DC capacitor of the SSSC is explained. Deducted expressions were validated with PSCAD/EMT... View full abstract»

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  • [Breaker page]

    Publication Year: 2005, Page(s): 111
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