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IEEE Transactions on Power Systems

Issue 2 • Date May 1990

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Displaying Results 1 - 25 of 42
  • An efficient algorithm for optimal reservoir utilization in probabilistic production costing

    Publication Year: 1990, Page(s):439 - 447
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    An efficient and accurate algorithm is presented which determines optimal storage reservoir utilization (pumped hydro) in probabilistic production cost models with multiple storage, thermal, and limited-energy units. The algorithm exploits the special nature of the production cost function, which is piecewise linear with respect to the reservoir utilization levels. It achieves the same accuracy as... View full abstract»

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  • Linear reactive power optimization in a large power network using the decomposition approach

    Publication Year: 1990, Page(s):428 - 438
    Cited by:  Papers (113)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    A mathematical framework is presented for the solution of the economic dispatch problem. The application of the Dantzig-Wolfe decomposition method for the solution of this problem is emphasized. The system's optimization problem is decomposed into several subproblems corresponding to specific areas in the power system. The upper bound technique along with the decomposition method are applied to a ... View full abstract»

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  • An energy based security measure for assessing vulnerability to voltage collapse

    Publication Year: 1990, Page(s):419 - 427
    Cited by:  Papers (77)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    A security measure is defined to indicate vulnerability to voltage collapse based on an energy function for system models that includes voltage variation and reactive loads. The system dynamic model, the energy function, and the security measure are first illustrated in a simple radial system. Application of the security measure and its computational aspects are then examined in a standard 30-bus ... View full abstract»

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  • Precedence relationship performance of an indirect matrix solver

    Publication Year: 1990, Page(s):412 - 418
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    A highly parallel truncated accelerated Neuman series preconditioner is presented. Results from using this preconditioner are compared with those obtained using a traditional truncated Neumann series preconditioner and the Jacobi method on matrices whose numerical content is characteristic of the bus admittance matrices used in the analysis of faulted power system problems. These results show that... View full abstract»

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  • Sparse matrix inverse factors [power systems]

    Publication Year: 1990, Page(s):466 - 473
    Cited by:  Papers (58)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The structural and computation properties of the sparse matrixes encountered in various power system network analysis problems are discussed. Specifically, the inverses of the factors of sparse matrixes produced by factorization or decomposition are discussed. These inverse factors are themselves sparse, at least under suitable ordering and partitioning, and lend themselves to parallel operations ... View full abstract»

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  • Fuel scheduling and accounting

    Publication Year: 1990, Page(s):682 - 688
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    The Houston Lighting and Power (HL&P) Company's new fuel scheduling and accounting (FSA) function is discussed. The fuel scheduling and accounting function allows HL&P to accurately and efficiently schedule, dispatch, and monitor fuel usage throughout the entire HL&P system. In addition to minimizing the total cost of generation using the classical economic dispatch approach, FSA will ... View full abstract»

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  • Frequency domain relaxation of power system dynamics

    Publication Year: 1990, Page(s):652 - 658
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    A highly parallel approach for solving nonlinear differential equations in the frequency domain is presented. Solutions of the frequency-domain equations involving polynomial approximations to the nonlinearities involved is handled using a relaxation technique to exploit parallelism. Identities involving frequency-domain matrix polynomials of dimension N and order n are developed... View full abstract»

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  • Rule-based stabilizer for multi-machine power system

    Publication Year: 1990, Page(s):403 - 411
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    An application of the rule-based stabilizing control scheme to improve the overall stability of electric power systems is presented. Several simple rules are prepared for each generator in the system. The stabilizing signal for each generator is of the discrete type; it is renewed at every sampling time to control the generator excitation levels depending on the speed/acceleration state of the gen... View full abstract»

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  • Hybrid transient stability analysis [power systems]

    Publication Year: 1990, Page(s):384 - 393
    Cited by:  Papers (99)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The hybrid method of power system transient stability analysis, which combines the desirable features of both the time-domain simulation technique and the direct method of transient stability analysis, is presented. The hybrid method first computes the actual system trajectory using time-domain simulation, then evaluates the transient energy function in order to derive a stability index for fast d... View full abstract»

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  • Demand-side management impact on the transmission and distribution system

    Publication Year: 1990, Page(s):506 - 512
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    A project to assess the impact on the transmission and distribution (TD) system due to the implementation of demand-side management (DSM) programs is described. Traditional TD planning methods are reviewed and procedural changes necessary to fully integrate DSM strategy analysis with the system planning process are discussed. Test procedures and results are discussed for a study conducted at a hos... View full abstract»

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  • Interruptible load control for Taiwan Power Company

    Publication Year: 1990, Page(s):460 - 465
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Three alternative incentive rate designs for an interruptible load program are described, one of which was activated by Taiwan Power Company (Taipower) in 1987 when some preliminary results were obtained. Here, the effect of the interruptible load on the system peak demand reduction and the change of daily load curve for large industrial customers is analyzed. The avoided cost is estimated and a m... View full abstract»

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  • Security enhancement using an optimal switching power flow

    Publication Year: 1990, Page(s):674 - 681
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    The method presented allows the determination of the optimal and n-1 secure power system state by switching operations. A linear switching model is applied in an active way to model the control actions and in a more passive way to set up contingency constraints. Using the switching model in a dual role permits the integration of contingencies and control actions into one optimization algo... View full abstract»

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  • The variance of production cost

    Publication Year: 1990, Page(s):367 - 375
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    A procedure to calculate the mean and the variance of energy production and its cost is outlined. The method uses the probability density function of hourly loads and machine outage representations. The results indicate that the variance of the cost is a very small percent of the mean. The method of modeling of the load has no effect on the mean of cost. However, the method of modeling the load ha... View full abstract»

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  • On the use of colours for presenting power system connectivity information

    Publication Year: 1990, Page(s):574 - 581
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A coloring concept is presented which shows the voltage level and the status of the power system element and allows the identification of the existing connectivity units. Connectivity units may be nodes, network groups (network islands), network districts (sets of interconnected nodes on the same level), and power source groups (elements fed by a common source point). The task of connectivity unit... View full abstract»

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  • Development of power system simulator for research and education

    Publication Year: 1990, Page(s):492 - 498
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    An analog power-system simulator developed for research and education at Waseda University is discussed. It allows system dynamic analyses to be done easily and gives an overall understanding of the events comprising the analyses. Structurally, the simulator consists of a power system block and a digital control block. Programmable controllers are used for the digital control block, making it conv... View full abstract»

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  • On the evaluation of voltage collapse criteria

    Publication Year: 1990, Page(s):612 - 620
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    An approach is proposed to enable a power system operator or planner to evaluate the alternatives in selecting a certain voltage collapse criterion. Specifically, the selection of a criterion must guarantee that the risk of making a wrong decision is minimal for any operating point and disturbance. This is done by recasting the various voltage collapse criteria in terms of a decision framework. So... View full abstract»

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  • A rule-based approach to decentralized voltage control

    Publication Year: 1990, Page(s):643 - 651
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    A rule-based approach for decentralized voltage control in power systems is presented. A network decomposition technique is used to alleviate a bus voltage limit violation using the most effective voltage control device available. This requires having only the network information local to the bus with a voltage limit violation. A rule-based problem analyzer calculates the network voltage sensitivi... View full abstract»

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  • Application of the REI equivalent for operations planning analysis of interchange schedules

    Publication Year: 1990, Page(s):547 - 555
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A methodology for performing projected interchange studies using an REI equivalent for power systems is presented. Using this REI methodology, based on a general concept previously suggested by T.E. Dy Liacco et al. (1978) but never applied, multiple interchange transactions can be quickly and accurately simulated by the selective, manual adjustment of REI node injections. The REI equivalent was s... View full abstract»

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  • Radio control of air conditioning in Rhode Island

    Publication Year: 1990, Page(s):448 - 451
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    A test is reported in which a VHF-FM radio communication system was used to control the compressors of central air-conditioning systems of 50 residential customers and 35 small commercial customers in Rhode Island between the hours of 12:00 and 5:00 pm during weekdays from June through September of 1988. Topics discussed include recruitment of participants, pre-experiment testing, equipment perfor... View full abstract»

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  • Microcomputer based power network control center simulator for education

    Publication Year: 1990, Page(s):474 - 481
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    A microcomputer-based power network control simulator designed to be used as a teaching aid for students in power engineering courses is introduced. The system is an offline version of control systems actually used in power utilities. It includes functions such as steady-state security analysis and security monitoring, online load flow, and contingency analysis. Using a special feature implemented... View full abstract»

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  • Developing concurrent processing applications to power system planning and operations

    Publication Year: 1990, Page(s):659 - 664
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The implementation of existing power system applications in a concurrent programming environment is discussed. The tools comprise a multiprocessor computing system with concurrent processing software facilities and a concurrent processing simulator for helping on problem partition and debugging. Shorter execution times taking into account the solution structure are obtained. Three case studies are... View full abstract»

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  • Implementation of the CDA procedure in the EMTP

    Publication Year: 1990, Page(s):394 - 402
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The application of the critical damping adjustment (CDA) technique to some of the main equipment models in the DCG/EPRI version of EMTP is presented. The CDA procedure eliminates the numerical oscillations that can occur in transients simulations that use the trapezoidal rule of integration. The details of this implementation for linear elements, nonlinear reactors, frequency-dependent transmissio... View full abstract»

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  • Load management at a medium-size utility

    Publication Year: 1990, Page(s):513 - 519
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Grand Rapids is a medium-size city in northern Minnesota, served by its own municipal utility. The rate structure of its wholesale energy supplier causes wholesale demand charges to be quite high and energy charges to be quite low. A load-management feasibility study showed that major reductions in demand charges could be achieved, and that dual-fuel residential heating could be introduced. Detail... View full abstract»

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  • An optimized procedure for determining incremental heat rate characteristics

    Publication Year: 1990, Page(s):376 - 383
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    An optimized procedure for producing generator incremental heat rate curves from continually sampled unit performance data is described. A generalized reduced-gradient algorithm is applied to optimally locate break points in incremental heat rate curves. Advantages include the ability to automatically take into consideration slow time-varying effects such as unit aging and temperature variations i... View full abstract»

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  • A method for finding a pair of multiple load flow solutions in bulk power systems

    Publication Year: 1990, Page(s):582 - 591
    Cited by:  Papers (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    A fast method for finding a pair of multiple load flow solutions is presented. This method is based on observation of convergent characteristics using the Newton-Raphson method in rectangular coordinates. The observed loci converge straight to each of a pair of solutions. The optimal multiplier theory is extended to estimate multiple solutions by using three optimal multipliers. Test results show ... 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