Browsing by Author "1809"
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    The Electricity Market Agents Decisions within the New Iberian Electricity Market and the EU Emissions Trading Scheme
    ( 2007) Fernando Oliveira ; Jorge Correia Pereira ; Rita Sousa ; 1809
    The main purpose of this paper is the modelization and the analysis of the impact of the CO2 prices expected for the Kyoto and Post-Kyoto periods on the Iberian electricity market (MIBEL) decisions of their agents. It is expected that the technological combination currently used to generate electricity will change, as the recent generation structure was mainly intended to secure supply according to marginal costs of production (without the CO2 balance), maximizing each companies profits. Further, the integration of Portugal and Spain in a single market may as well change the generation scheduling, and generate, in coordination with CO2 pricing, important impacts on the value of the different generation technologies, and even on the benefits of integration as a whole. The first step was to develop a classical model for the scheduling of plants by a system operator aiming to minimize the social cost of electricity generation, and, in a second set of experiments we develop a Cournot game to model separately the Portuguese and Spanish markets and the MIBEL. At a technical level, the contribution of this paper is the development of a complex a detailed agent-based model (e.g., Bunn and Oliveira, 2001, 2003) of the Iberian electricity market, taking into account ramp-rates and start-up costs. The use of this method enabled us to develop a detailed model of the industry taking into consideration the technical constraints that make this a very hard problem to analy
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    The Electricity Market Agents Decisions within the New Iberian Electricity Market and the EU Emissions Trading Scheme
    ( 2007) Fernando Oliveira ; Jorge Correia Pereira ; Rita Sousa ; 1809
    The main purpose of this paper is the modelization and the analysis of the impact of the CO2 prices expected for the Kyoto and Post-Kyoto periods on the Iberian electricity market (MIBEL) decisions of their agents. It is expected that the technological combination currently used to generate electricity will change, as the recent generation structure was mainly intended to secure supply according to marginal costs of production (without the CO2 balance), maximizing each companies profits. Further, the integration of Portugal and Spain in a single market may as well change the generation scheduling, and generate, in coordination with CO2 pricing, important impacts on the value of the different generation technologies, and even on the benefits of integration as a whole. The first step was to develop a classical model for the scheduling of plants by a system operator aiming to minimize the social cost of electricity generation, and, in a second set of experiments we develop a Cournot game to model separately the Portuguese and Spanish markets and the MIBEL. At a technical level, the contribution of this paper is the development of a complex a detailed agent-based model (e.g., Bunn and Oliveira, 2001, 2003) of the Iberian electricity market, taking into account ramp-rates and start-up costs. The use of this method enabled us to develop a detailed model of the industry taking into consideration the technical constraints that make this a very hard problem to analy
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    Estimating Breaker Status with Electrical State Images and Convolutional Neural Networks
    ( 2019) Vladimiro Miranda ; Teixeira,L ; Jorge Correia Pereira ; 208 ; 1809
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    The Iberian Electricity Market Agents Decisions Concerning CO2 Prices in Kyoto and Post-Kyoto Periods
    ( 2007) Rita Sousa ; Fernando Oliveira ; Jorge Correia Pereira ; 1809
    In this paper it is analysed the impact of expected CO2 prices for Kyoto and Post-Kyoto periods on Mibels agents decisions. The generation scheduling changes when comparing an oligopoly to perfect competition in pre and post integration and CO2 pricing situations. The focussed aspects include clearing prices, the value of the different technologies, and how both countries are likely to be affected. We develop a Cournot game to model Portugal, Spain and MIBEL in a complex and detailed agent-based model, taking into account technical constraints such as ramp rates and startup and shutdown costs.
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    The Iberian Electricity Market Agents Decisions Concerning CO2 Prices in Kyoto and Post-Kyoto Periods
    ( 2007) Rita Sousa ; Fernando Oliveira ; Jorge Correia Pereira ; 1809
    In this paper it is analysed the impact of expected CO2 prices for Kyoto and Post-Kyoto periods on Mibels agents decisions. The generation scheduling changes when comparing an oligopoly to perfect competition in pre and post integration and CO2 pricing situations. The focussed aspects include clearing prices, the value of the different technologies, and how both countries are likely to be affected. We develop a Cournot game to model Portugal, Spain and MIBEL in a complex and detailed agent-based model, taking into account technical constraints such as ramp rates and startup and shutdown costs.
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    Impact of different central path neighborhoods on gross error identification in State Estimation with generalized correntropy interior point method
    ( 2019) Moayyed,H ; Shabnam Pesteh ; Vladimiro Miranda ; Jorge Correia Pereira ; 1809 ; 7130 ; 208
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    Improved battery storage systems modeling for predictive energy management applications
    ( 2022) Ricardo Silva ; Gouveia C. ; Carvalho L. ; Jorge Correia Pereira ; 1809 ; 7343
    This paper presents a model predictive control (MPC) framework for battery energy storage systems (BESS) management considering models for battery degradation, system efficiency and V-I characteristics. The optimization framework has been tested for microgrids with different renewable generation and load mix considering several operation strategies. A comparison for one-year simulations between the proposed model and a naïve BESS model, show an increase in computation times that still allows the application of the framework for real-time control. Furthermore, a trade-off between financial revenue and reduced BESS degradation was evaluated for the yearly simulation, considering the degradation model proposed. Results show that a conservative BESS usage strategy can have a high impact on the asset's lifetime and on the expected system revenues, depending on factors such as the objective function and the degradation threshold considered. © 2022 IEEE.
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    A new interior point solver with generalized correntropy for multiple gross error suppression in state estimation
    ( 2019) Shabnam Pesteh ; Moayyed,H ; Vladimiro Miranda ; Jorge Correia Pereira ; Victor Silva Freitas ; Simoes Costa,AS ; London Jr,JBA ; 1809 ; 208 ; 7130 ; 7194
    This paper provides an answer to the problem of State Estimation (SE) with multiple simultaneous gross errors, based on Generalized Error Correntropy instead of Least Squares and on an interior point method algorithm instead of the conventional Gauss–Newton algorithm. The paper describes the mathematical model behind the new SE cost function and the construction of a suitable solver and presents illustrative numerical cases. The performance of SE with the data set contaminated with up to five simultaneous gross errors is assessed with confusion matrices, identifying false and missed detections. The superiority of the new method over the classical Largest Normalized Residual Test is confirmed at a 99% confidence level in a battery of tests. Its ability to address cases where gross errors fall on critical measurements, critical sets or leverage points is also confirmed at the same level of confidence. © 2019 Elsevier B.V.
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    NEXTSTEP – Developing future smart secondary substations
    ( 2021) Carreira,PJG ; Santos,JMM ; Pires,L ; Ferreira,VGM ; Almeno,L ; Pinheiro,S ; Neves,E ; Azevedo,L ; Costa,N ; Gomes,F ; Gouveia,C ; Eric Zanghi ; Jorge Correia Pereira ; Simões,N ; Tadeu,A ; Coimbra,A ; Oliveira,J ; Aparício,A ; 1809 ; 6686
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    NEXTSTEP – Developing future smart secondary substations
    ( 2021) Carreira,PJG ; Santos,JMM ; Pires,L ; Ferreira,VGM ; Almeno,L ; Pinheiro,S ; Neves,E ; Azevedo,L ; Costa,N ; Gomes,F ; Gouveia,C ; Eric Zanghi ; Jorge Correia Pereira ; Simões,N ; Tadeu,A ; Coimbra,A ; Oliveira,J ; Aparício,A ; 1809 ; 6686
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    On the development of a framework for the advanced monitoring of LV grids
    ( 2019) Kotsalos,K ; Marques,L ; Sampaio,G ; Jorge Correia Pereira ; Gouveia,C ; Henrique Silva Teixeira ; Fernandes,R ; Campos,F ; 1809 ; 5217
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    Unit Commitment Including Economic Dispatch with Network Constraints
    ( 2007) Jorge Correia Pereira ; Ana Viana ; Manuel Matos ; 214 ; 1809 ; 3708
    In this paper it is presented the development of an algorithm to solve two complex power systems problems at once. The algorithm carry out two steps: solve the Unit Commitment problem using a meta-heuristic with Constraint Oriented Neighborhoods and promote the base to the Economic Dispatch problem, which consists on the optimization of operating costs under the general constraints to the power system, which is solved through the use of linear programming. The algorithm was applied with success to the Mozambique electric power system, achieving good results and less execution timing consuming.
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    Unit Commitment Including Economic Dispatch with Network Constraints
    ( 2007) Jorge Correia Pereira ; Ana Viana ; Manuel Matos ; 214 ; 1809 ; 3708
    In this paper it is presented the development of an algorithm to solve two complex power systems problems at once. The algorithm carry out two steps: solve the Unit Commitment problem using a meta-heuristic with Constraint Oriented Neighborhoods and promote the base to the Economic Dispatch problem, which consists on the optimization of operating costs under the general constraints to the power system, which is solved through the use of linear programming. The algorithm was applied with success to the Mozambique electric power system, achieving good results and less execution timing consuming.