Browsing by Author "Moreno, R."

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    Analysis of generation investments under price controls in cross-border trade of electricity
    (2023) Muñoz Abogabir, Juan Carlos; Sauma, E.; Muñoz, F.D.; Moreno, R.
    Price controls are commonly employed in Latin America and other regions to prevent price increases in exporting regions during cross-border trade of electricity. This paper introduces a methodology to evaluate the economic impact of price controls on generation investments, dispatch decisions, and carbon emissions in the context of cross-border electricity trade. We propose a non-linear adjusting function to represent a price-control rule, which can be incorporated into equilibrium models for generation firms and price-sensitive consumers. By employing fixed-point iterations between the adjusting function and an optimization problem that determines equilibrium investments and dispatch decisions for generation firms in a competitive environment, we obtain an equilibrium solution. We apply the proposed methodology to analyze the current price controls governing cross-border electricity trade between Chile and Argentina, with a focus on the exporting country. Our findings reveal that existing price controls can impede incentives for renewable energy investments, particularly in wind and solar, while stimulating investments in fossil fuel-based generation capacity. Moreover, these controls lead to increased emissions compared to a scenario without price controls. Additionally, we observe that the inefficiency resulting from price controls is proportionate to the volume of exports relative to local demand and the price elasticity of demand in the importing region
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    Auction approaches of long-term contracts to ensure generation investment in electricity markets: Lessons from the Brazilian and Chilean experiences
    (ELSEVIER SCI LTD, 2010) Moreno, R.; Barroso, L. A.; Rudnick, H.; Mocarquer, S.; Bezerra, B.
    The implementation of auctions of long-term electricity contracts is arising as an alternative to ensure generation investment and therefore achieve a reliable electricity supply. The aim is to reconcile generation adequacy with efficient energy purchase, correct risk allocation among investors and consumers, and the politico-economic environment of the country. In this paper, a generic proposal for a long-term electricity contracts approach is made, including practical design concepts for implementation. This proposal is empirically derived from the auctions implemented in Brazil and Chile during the last 6 years. The study is focused on practices and lessons which are especially useful for regulators and policy makers that want to facilitate the financing of new desirable power plants in risky environments and also efficiently allocate supply contracts among investors at competitive prices. Although this mechanism is generally seen as a significant improvement in market regulation, there are questions and concerns on auction performance that require careful design and which are identified in this paper. In addition, the experiences and proposal described can serve to derive further mechanisms in order to promote the entrance of particular generation technologies, e.g. renewables, in the developed world and therefore achieve a clean electricity supply. (C) 2010 Elsevier Ltd. All rights reserved.
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    Discrete optimization via simulation to determine reliable network investments
    (IEEE, 2017) Lagos, T.; Ordóñez, F.; Sacaan, Rafael; Rudnick Van de Wyngard, Hugh; Navarro-Espinosa, A.; Moreno, R.
    Solving optimization problems in power systems planning often imposes a compromise between the accurate representation of the power system operation and the simplifications made in the mathematical methodologies used to find the optimal solution. Hence, classic heuristic algorithms go deep modelling operational details without having a clear message about the quality of the solution, whereas mathematical programming approaches find the optimal solution by (significantly) simplifying system operation. In this vein, this article proposes the utilization of Discrete Optimization via Simulation algorithms to solve optimization problems when a detailed representation of the system and information about the quality of the solution are required. In particular, the Industrial Strength COMPASS algorithm is applied to find the optimal set of new transmission lines that maximizes power system reliability given a certain budget and considering a detailed power system model, where a full unit commitment with network constraints and an hourly sequential Monte Carlo are implemented.
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    Ensuring Resource Adequacy with Auctions of Options and Forward Contracts
    (IEEE, 2007) Barroso, L. A.; Rudnick Van de Wyngard, Hugh; Moreno, R.; Bezerra, B.
    The implementation of auctions of long-term firm energy call options and forward contracts as part of the instruments adopted in emerging countries to ensure resource adequacy is discussed. These mechanisms are being implemented in Latin American nations (Brazil, Chile, Peru, El Salvador and Panama) and fast-growing economies in Europe such as Turkey. Brazil has led this process and in overall has auctioned about 25,000 average MW of contracts, involving about 65 billion USD in financial transactions, while Chile has carried out its first auction in 2006, involving about 1,300 average MW (30% of energy sales of the main interconnected Chilean system expected for 2010). Overall, this mechanism is proving to be adequate to attract investments and ensure resource adequacy.
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    Improving distribution network resilience against earthquakes
    (IET, 2017) Navarro-Espinosa, A.; Moreno, R.; Lagos, T.; Ordoñez, F.; Sacaan, R.; Espinoza, S.; Rudnick, Hugh
    Historically, reliability analysis has ignored the occurrence of natural hazards such as those associated with extreme weather, flooding, earthquakes and tsunamis, which are becoming more and more relevant due to recent events. In this content, we present an assessment methodology to determine the resiliency levels of a distribution system e,posed to a major earthquake. The proposed 4-stage methodology models (i) the earthquake, (ii) the fragility of network components, (iv) the network outages, and (v) the impacts on network operation (including the energy not supplied) through sequential Monte Carlo simulations. This methodology is used to study the resilience of distribution networks under two particular strategies: one that hardens substations infrastructure in order to reduce their fragility levels, and the other one that uses additional network infrastructure in the form of transfer cables to shift load among substations in case a major event occurs. Through several case studies based on a real distribution network in Chile, we demonstrate that hardening substations infrastructure may be a more resilient way to deal with earthquakes, even when compared to an alternative, extreme case where a vast number of transfer cables are installed to support damaged substations
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    Insertion of distributed generation into rural feeders
    (IEEE, 2009) Mohr Ríoseco, Ricardo Alberto; Moreno, R.; Rudnick Van de Wyngard, Hugh
    The connection of renewable energy distributed generators (DG) to radial feeders is assessed. Often, the long distance between renewable power sources and the transmission system, in addition to the small capacity of these generators, renders unprofitable the installation of private lines from the DG to that system. This situation motivates the DG owner to connect the generator to the distribution network. The distribution systems, however, are not usually designed to receive energy at the consumer end. This problem intensifies in developing countries where rural distribution systems are very limited. Thus, when connecting a DG to a radial feeder it is often necessary to upgrade the feeder. A methodology is proposed and developed to evaluate the costs of optimally upgrading the radial feeder when a DG is installed.
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    Noonan syndrome with multiple Giant cell lesions, management and treatment with surgery and interferon alpha-2a therapy: Case report
    (2020) Rodríguez, F. A.; Castellón, L.; Moreno, R.; Paez, E.; Aracena Álvarez, Mariana Inés
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    The AD1835 eruption at Robinson Crusoe Island discredited : Geological and historical evidence
    (2020) Lara, L. E.; Moreno, R.; Valdivia, V.; Aránguiz, R.; Lagos López, Marcelo
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    The thermal emission of Centaurs and trans-Neptunian objects at millimeter wavelengths from ALMA observations
    (2017) Lellouch, E.; Moreno, R.; Müller, T.; Fornasier, S.; Santos Sanz, P.; Moullet, A.; Gurwell, M.; Stansberry, J.; Leiva Espinoza, Rodrigo Andrés; Sicardy, B.