IEEE Transactions on Power Systems

Issue 1 • Feb 1992

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Displaying Results 1 - 25 of 61
  • Computer aided structural and geometric design of power lines

    Publication Year: 1992, Page(s):438 - 443
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (548 KB)

    The authors describe an integrated computer environment for the structural design of new power lines, the evaluation of existing lines, and their long-term management. The contents of the various databases that are needed to describe an entire line are described. A way of verifying the strength of transmission and distribution structures is proposed. The authors illustrate how some of the engineer... View full abstract»

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  • Real-time reactive security monitoring

    Publication Year: 1992, Page(s):432 - 437
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (492 KB)

    Severe economic penalties are imposed by constraints on energy transfers imposed by contingent voltage support problems in power systems. The analysis outlined uses the granularity that characterizes power networks to define zones within which reactive reserves must match contingent reactive requirements in order to avoid voltage support problems. Tracking of reserves relative to contingent requir... View full abstract»

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  • Teaching power system protection with industry's cooperation

    Publication Year: 1992, Page(s):363 - 369
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (704 KB)

    Since 1988, the system relay engineer of Kansas Power & Light Gas Service has served as a guest lecturer for the course on fault analysis and protection of power systems at Kansas State University. He meets the class five times during the semester. Two of these visits are field trips. In the other three visits he discusses power systems protection from a practicing engineer's point of view. He... View full abstract»

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  • Bifurcation theory and its application to nonlinear dynamical phenomena in an electrical power system

    Publication Year: 1992, Page(s):424 - 431
    Cited by:  Papers (161)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (524 KB)

    A tutorial introduction in bifurcation theory is given, and the applicability of this theory to study nonlinear dynamical phenomena in a power system network is explored. The predicted behavior is verified through time simulation. Systematic application of the theory revealed the existence of stable and unstable periodic solutions as well as voltage collapse. A particular response depends on the v... View full abstract»

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  • Current industry practices in bulk transmission outage data collection and analysis

    Publication Year: 1992, Page(s):158 - 166
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (692 KB)

    The scope of the task force was to outline techniques and procedures for analysis of bulk transmission outage data, and to explain the uses and limitations of calculated statistics. The task force had the following objectives: survey the utility industry on the collection and analysis of bulk transmission-independent outage events; evaluate the basic concepts necessary to develop performance indic... View full abstract»

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  • A novel approach to integrate computer exercises into teaching of utility-related applications of power electronics

    Publication Year: 1992, Page(s):359 - 362
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (336 KB)

    The author presents a novel approach to integrating computer exercises into the teaching of utility-related applications of power electronics. First, it is argued that the various emerging high-power applications of power electronics should be included in the power engineering curriculum. Based on a survey of available software packages, two royalty-free programs which are best suited for this pur... View full abstract»

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  • Damping and synchronizing torque computation in multimachine power systems

    Publication Year: 1992, Page(s):280 - 286
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (484 KB)

    The authors present a method for calculating the damping and synchronizing torques in multimachine power systems. This method is applied to evaluate the damping and synchronizing torques in interconnected power systems, and weakly coupled and closely coupled machines for different operating conditions and machine parameters. The investigation is enhanced by modal analysis. It was found that both a... View full abstract»

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  • Belgian interutility data exchanges within operation

    Publication Year: 1992, Page(s):301 - 306
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (496 KB)

    The existing Belgian national control center uses a multicomputer-based SCADA system, in operation since 1976. A new system has been ordered. This EMS (energy management system) tool consists of application computers and software, SCADA (supervisory control and data acquisition) and communication processors. It also includes an emergency control center. Data exchanges between national and regional... View full abstract»

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  • The continuation power flow: a tool for steady state voltage stability analysis

    Publication Year: 1992, Page(s):416 - 423
    Cited by:  Papers (741)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (616 KB)

    The authors present a method of finding a continuum of power flow solutions starting at some base load and leading to the steady-state voltage stability limit (critical point) of the system. A salient feature of the so-called continuation power flow is that it remains well-conditioned at and around the critical point. As a consequence, divergence due to ill-conditioning is not encountered at the c... View full abstract»

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  • Damping structure and sensitivity in the NORDEL power system

    Publication Year: 1992, Page(s):97 - 105
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (760 KB)

    To enhance the inherent damping of power systems due to generators and loads, a variety of stabilizer configurations can be used for the generators, static VAr compensators (SVCs), and high-voltage DC (HVDC) links. How the overall damping matrix is built up from these contributions is studied. This is used to develop a technique for systematic siting of damping equipment in power systems with seve... View full abstract»

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  • Distribution factors of reactive power flow in transmission line and transformer outage studies

    Publication Year: 1992, Page(s):194 - 200
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (620 KB)

    The authors present a fast and accurate method to calculate a set of distribution factors of reactive power flow for transmission line and transformer outage studies. The transmission branches are broken into two categories: transmission lines and transformers. Separate formulas are derived to calculate the distribution factors of the reactive power flow. A transmission line model is developed. Th... View full abstract»

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  • Auxiliary power controls on the Nelson River HVDC scheme

    Publication Year: 1992, Page(s):398 - 402
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    The author describes the auxiliary power controls on the Nelson River high-voltage DC (HVDC) scheme. He identifies the unique operating problems of the AC systems to which the Nelson River HVDC scheme feeds and shows how auxiliary power controls are utilized to substantially improve the integrated system performance. The fast control feature of the HVDC link can be utilized to enhance the operatio... View full abstract»

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  • Engineering economics on inflation

    Publication Year: 1992, Page(s):73 - 80
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (788 KB)

    To review the engineering literature on inflation, 82 references, including texts in engineering economics and capital budgeting, where annotated and grouped. Of these, the dozen most recent texts in engineering economics were systematically compared according to their treatment of inflation and their terminology. The history of the terminology and the treatment of inflation in discounted cash flo... View full abstract»

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  • Reader's guide to subsynchronous resonance

    Publication Year: 1992, Page(s):150 - 157
    Cited by:  Papers (134)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (632 KB)

    Many utilities are either applying or considering applying series capacitors because of the economic advantage. But the hazards to turbine-generators require that utility engineers fully understand and thoroughly analyze the effects of subsynchronous resonance (SSR) caused by series capacitors. To help in the understanding and analysis of SSR, the authors consolidate and review the key issues. Dis... View full abstract»

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  • How to adapt the EMTP for classroom instruction

    Publication Year: 1992, Page(s):351 - 358
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (516 KB)

    The electromagnetic transient program (EMTP) is a general-purpose program which can cover a broad spectrum of transient studies. The ATP version incorporates a powerful technique, known as data modularization, which can facilitate the program usage. The aim is to show that data modularization can be used for the development of a module package that permits the use of the EMTP for classroom instruc... View full abstract»

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  • Stochastic dual dynamic programming for seasonal scheduling in the Norwegian power system

    Publication Year: 1992, Page(s):273 - 279
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (624 KB)

    The aim is to show an application of stochastic dual dynamic programming to seasonal planning in a part of the Norwegian hydro-dominated power system. The subsystem under study has 35 reservoirs on 28 watercourses. It is found that for the study system the new procedure is entirely feasible and gives good results. Two implementation details are studied more closely: use of relaxation in the soluti... View full abstract»

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  • Coordination of multiple adaptive PSS units using a decentralized control scheme

    Publication Year: 1992, Page(s):294 - 300
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (592 KB)

    The authors present a method of coordinating multiple adaptive power system stabilizer (PSS) units in a power system. The method is based on a decentralized adaptive control scheme. Self-tuning adaptive controllers are used as PSS units on given generators. The generators that tend to strongly dynamically interact are coordinated by communicating the controlled inputs between them. The communicate... View full abstract»

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  • Fuel constrained unit commitment

    Publication Year: 1992, Page(s):410 - 415
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (428 KB)

    The authors present a generalized method of solving the unit commitment problem with fuel constraints. The fuel-constrained unit commitment problem is decomposed into a linear fuel dispatch (FD) problem and a unit commitment (UC) problem. The FD problem optimizes system fuel cost while satisfying fuel constraints and unit fuel requirements. It also calculates the effective price at a unit. The uni... View full abstract»

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  • The implementation of an energy brokerage system using linear programming

    Publication Year: 1992, Page(s):90 - 96
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (536 KB)

    The authors focus on the economics involved in energy transfers. The function of an energy brokerage system is to establish interchange schedules between participating utilities in such a manner as to maximize the resulting savings. A brokerage system that uses linear programming (LP) is presented to maximize the savings or profits to each utility subject to import and export constraints. The cost... View full abstract»

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  • Hopf bifurcations in torsional dynamics [turbine-generators]

    Publication Year: 1992, Page(s):28 - 36
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (672 KB)

    The authors extend the analysis of torsional oscillations into the nonlinear range and investigate the Hopf bifurcation phenomenon of the torsional dynamics of a turbine generator in a series capacitor compensated power system. The transition of growing torsional oscillations into nonlinear oscillations with limit cycles is demonstrated. Based on physical reasoning, a set of approximate nonlinear ... View full abstract»

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  • A hybrid model for quantifying different operating states of composite power systems

    Publication Year: 1992, Page(s):187 - 193
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (560 KB)

    The two most popular approaches for power system reliability evaluation, namely contingency enumeration and Monte Carlo simulation, have been combined to form a hybrid model to analyze different system operating states to provide a quantitative assessment of system risk. Both annualized and annual indices obtained using a seven-step load model are presented for two test systems. Selection methods ... View full abstract»

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  • Short term localized load prediction

    Publication Year: 1992, Page(s):389 - 397
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (640 KB)

    The development of a three hour load prediction model at Detroit Edison is described. All major electric utilities are required to maintain a certain level of integrity, especially during heat storm days. The predicted temperature and the anticipated load may require several operations including: circuit cutover, jumpering, and load transfer; installation of emergency equipment, like portable tran... View full abstract»

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  • Voltage control improvement through capacitor and transformer tap optimization

    Publication Year: 1992, Page(s):222 - 227
    Cited by:  Papers (38)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (680 KB)

    The authors present a study of the existing and planned voltage control devices on the Ohio Edison (OE) transmission and subtransmission system. These devices included 104 transformers, most of which are fixed tap, and over 100 sites for new or additional capacitor bank installations. The intent was to determine the transformer tap settings and reactive allocation to provide the best possible volt... View full abstract»

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  • A security based approach to composite power system reliability evaluation

    Publication Year: 1992, Page(s):65 - 72
    Cited by:  Papers (91)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (672 KB)

    An electric power network containing generation and transmission facilities can be divided into several states in terms of the degree to which adequacy and security constraints are satisfied in a reliability evaluation of the composite system. The composite system is classified into different system states for which probabilistic indices are calculated. Both annualized and annual indices using a s... View full abstract»

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  • Short term load forecasting using a multilayer neural network with an adaptive learning algorithm

    Publication Year: 1992, Page(s):141 - 149
    Cited by:  Papers (156)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (748 KB)

    A multilayer feedforward neural network is proposed for short-term load forecasting. To speed up the training process, a learning algorithm for the adaptive training of neural networks is presented. The effectiveness of the neural network with the proposed adaptive learning algorithm is demonstrated by short-term load forecasting of the Taiwan power system. It is found that, once trained by the pr... View full abstract»

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Aims & Scope

Covers the requirements, planning, analysis, reliability, operation, and economics of electric generating, transmission, and distribution systems for general industrial, commercial, public, and domestic consumption.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Nikos Hatziargyriou
National Technical University of Athens