Browsing by Author "Rudnick, H"

Now showing 1 - 7 of 7
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    Cost assignment model for electrical transmission system expansion: An approach through the Kernel theory
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003) Evans, F; Zolezzi, JM; Rudnick, H
    A cost assignment model is proposed for the expansion of electrical transmission systems, based on the cooperation and interaction principles that are the foundation of the cooperative game theory. A solution algorithm is proposed that considers the development of independent cooperative games for each expansion\ segment and whose final assignment can be obtained by any game theory solution method (Kernel, Nucleolus, Shapley Value, etc.). The Kernel method was chosen because it has both equilibrium and transparency characteristics in the computation of final assignments.
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    Electric sector deregulation and restructuring in Latin America: lessons to be learnt and possible ways forward
    (INST ENGINEERING TECHNOLOGY-IET, 2001) Rudnick, H; Zolezzi, J
    The pioneering restructuring and deregulation process of the electricity industry, which started in Latin America as early as 1982, is assessed. Chile and Argentina, among others, have been at the forefront of innovation in the creation of electricity markets. The experience gained and the principal difficulties encountered in these 18 years are reviewed, highlighting the weaknesses and successes of the deregulation processes. A review is made of the challenges and prospects for development of the electrical sector in the region, where energy integration across countries flourishes and world energy players have started acquiring regional utilities. Regulations and market structures are being evaluated, and countries are introducing changes, the danger being that the remedies being considered may be worse than the disease.
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    Electromechanical transients simulation on a multicomputer via the VDHN-Maclaurin method
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001) Morales, F; Rudnick, H; Cipriano, A
    This paper reports simulations of power systems electromechanical transients on a multicomputer, formulated as a nonlinear algebraic problem by using the time parallelization concept,:The bi-factorized inversion, which is the most time consuming stage of the simulation, is solved by the "Very Dishonest Newton(VDHN)-Maclaurin" method, a fully parallel indirect method based on the decomposition of the nonupdated Jacobian matrix. This proposal is made to orient the search for the decomposition based on a sufficient condition for the convergence of the Maclaurin series, which is a desirable situation for the design of more robust algorithms for power system simulation. Such condition keeps a close relation with a physical coupling property exhibited by power systems, and the characteristics of the simulation method. Theoretical and numerical results show that a successful implementation of this method can be better reached when the Jacobian matrix is decomposed as a block diagonal matrix plus a matrix with off diagonal blocks elements, the latter representing weak couplings between the diagonal blocks, The epsilon Decomposition is used to satisfy the sufficient condition for convergence and the Longest Path Scheduling Method to prevent the uneven loading of processors, permitting to adapt the method in a efficient way on a coarse grain computer, The parallel simulation was written in C language and implemented on a Parsytec PowerXplorer multicomputer. Test using electromechanical models of the Chilean Central Interconnected system and the IEEE300 test system were made to evaluate the advantages and drawbacks Of the parallel method.
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    More on electric power privatization
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996) Rudnick, H
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    Short-term hydrothermal generation scheduling model using a genetic algorithm
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003) Gil, E; Bustos, J; Rudnick, H
    A new model to deal with the short-term generation scheduling problem for hydrothermal systems is proposed. Using genetic algorithms (GAs), the model handles simultaneously the subproblems of short-term hydrothermal coordination, unit commitment, and economic load dispatch. Considering a scheduling horizon period of a week, hourly generation schedules are obtained for each of both hydro and thermal units. Future cost curves of hydro generation, obtained from long and mid-term models, have been used to optimize the amount of hydro energy to be used during the week. In the genetic algorithm (GA) implementation, a new technique to represent candidate solutions is introduced, and a set of expert operators has been incorporated to improve the behavior of the algorithm. Results for a real system are presented and discussed.
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    Transmission cost allocation by cooperative games and coalition formation
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002) Zolezzi, JA; Rudnick, H
    The allocation of costs of a transmission system to its users is still a pending problem in many electric sector market regulations. This paper contributes with a new allocation method among the electric market participants. Both cooperation and competition are defined as the leading principles to fair solutions and efficient cost allocation. The method is based mainly on the responsibility of the agents in the physical and economic use of the network, their rational behavior, the formation of coalitions, and cooperative game theory resolution mechanisms. The designed method is applicable to existing networks or to their expansion. Simulations are made with sample networks. Results conclude that adequate solutions are possible in a decentralized environment with open access to networks. Comparisons with traditional allocation systems are shown and cooperative game solutions compare better in economic and physical terms.
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    Use of system approaches for transmission open access pricing
    (ELSEVIER SCI LTD, 1999) Rudnick, H; Soto, M; Palma, R
    The Latin American deregulated markets have based their open access schemes on a concept that considers a multilateral use of the transmission system, with all agents contributing to the financing of a common network based on physical and economic usage, irrespective of commercial arrangements. The paper describes the concept and the existing schemes and contributes with the formulation of alternative numerical approaches for open access pricing, taking into account energy and capacity use of the system by the participant agents. Distribution factors based on DC power flows are the basic elements of the formulation, which is built based on different physical and economic considerations. The approaches are numerically evaluated in the Chilean main interconnected electrical system, with a comparison of the resultant impacts on generators and consumers. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.