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A dynamic real option-based investment model for renewable energy portfolios
Campos Passos, Aderson; Street, Alexandre; Nobrega Barroso, Luiz Augusto (2017-03-01)This work proposes a dynamic model to devise the optimal risk-averse investment policy in a portfolio of complementary renewable sources for a generation company in the Brazilian power system. The proposed method merges a ... -
A hybrid MILP and benders decomposition approach to find the nucleolus quota allocation for a renewable energy portfolio
Freire, Lucas; Street, Alexandre; Lima, Delberis A.; Nobrega Barroso, Luiz Augusto (2015-11-01)Portfolios of renewable electricity sources are interesting risk-management mechanisms for trading in electricity contract markets. When formed by players belonging to different companies, their stability relies on the way ... -
A natural fit: electricity-gas integration challenges in South America
Rudnick, Hugh; Nobrega Barroso, Luiz Augusto; Cunha, Gabriel; Valenzuela Mocarquer, Luis Sebastian (2014-11-01)South America is one of the most dynamic regions for the joint development of natural gas and electricity. Gas is abundant in the region, although unevenly distributed (see Figure 1), with significant new reserves projected ... -
A probabilistic and value-based planning approach to assess the competitiveness between gas-fired and renewables in hydro-dominated systems: a Brazilian case study
Nazaré, Felipe; Nobrega Barroso, Luiz Augusto; Bezerra, Bernardo Vieira (2021-11-01)The main challenge with the penetration of variable renewable energy (VRE) in thermal-dominated systems has been the increase in the need for operating reserves, relying on dispatchable and flexible resources. In the case ... -
Achieving retail liberalization in middle-income countries: challenges and successes of the Brazilian experience
Cunha, Gabriel; Valenzuela da Silva, Paula Andrea; Siciliano, Gisella; Magalhães Gomes, Angela; Cavaliere, Mateus; Nobrega Barroso, Luiz Augusto (2023-07-01)Electricity market liberalization initiatives have swept the world since they were first proposed and thoroughly studied in the 1980s, finding significant buy-in from middle-income countries. Many of these countries embarked ... -
Adjusting the aim of capacity mechanisms: future-proof reliability metrics and firm supply calculations
Brito Pereira, Paulo; Mastropietro, Paolo; Rodilla Rodríguez, Pablo; Nobrega Barroso, Luiz Augusto; Batlle López, Carlos (2022-05-01)Capacity mechanisms are now deemed a regulatory mainstay in liberalised power system decarbonisation. These instruments aim to ensure sufficient resource adequacy with a mix able to meet the reliability target set by the ... -
Can Brazil become a green hydrogen powerhouse?
Kelman, Rafael; Gaspar, Luana de S.; Geyer, Florian S.; Nobrega Barroso, Luiz Augusto; Veiga Pereira, Mario (2020-11-01)This paper assesses the feasibility of green hydrogen production in Brazil. By green hydrogen, it is meant the hydrogen produced by the electrolysis of water by consuming electricity produced by renewable sources. The ... -
Capacity mechanisms: needs, solutions and state of affairs
Doorman, Gerard; Barquín Gil, Julián; Nobrega Barroso, Luiz Augusto; Batlle López, Carlos; Cruickshank, Alex; Dervieux, Christophe; Flanagan, Robert; Gilmore, Joel; Greenhalg, James; Höschle, Hanspeter; Mastropietro, Paolo; Keech, Adam; Krupa, Mariusz; Riesz, Jenny (CIGRÉ (París, Francia), 2016-02-01) -
Combinatorial and simultaneous descending auctions for electricity transmission concessions
de Sa Ferreira, Rafael; Tancredo Borges, Carmen Lucia; Nobrega Barroso, Luiz Augusto (2018-07-01)Many countries use auctions to select agents to which transmission concessions are awarded. Where multiple concessions are auctioned each year, there are potential benefits, for transcos and grid users, in using auction ... -
Contracting strategies for renewable generators: a hybrid stochastic and robust optimization approach
Fanzeres, Bruno; Street, Alexandre; Nobrega Barroso, Luiz Augusto (2015-07-01)We present a new methodology to support an energy trading company (ETC) to devise contracting strategies under an optimal risk-averse renewable portfolio. The uncertainty in the generation of renewable energy sources is ... -
Efficient de-rating in modern capacity mechanisms and the interdepence with reliability metrics
Brito Pereira, Paulo; Rodilla Rodríguez, Pablo; Mastropietro, Paolo; Nobrega Barroso, Luiz Augusto; Batlle López, Carlos -
Electrical expansion in South America: centralized or distributed generation for Brazil and Colombia
Ferreira, Rafael; Corredor Avella, Pablo Hernán; Rudnick, Hugh; Cifuentes, Ximena; Nobrega Barroso, Luiz Augusto (2019-03-01)Questions on whether the power system of the future will be centralized or distributed occupy institutions and agents of the South American electricity industry as well as their peers in other regions of the world. A ... -
Electricity auctions in South America: towards convergence of system adequacy and RES-E support
Mastropietro, Paolo; Batlle López, Carlos; Nobrega Barroso, Luiz Augusto; Rodilla Rodríguez, Pablo (2014-12-01)Regulatory reforms of the electricity industry in South America have always been prompted by the need of attracting enough investment to cover the fast-paced demand growth. In order to achieve this goal, the countries in ... -
Empowering consumers: challenges and opportunities [Guest editorial]
Nobrega Barroso, Luiz Augusto; Batlle López, Carlos (2023-07-01)The idea of giving individuals or households more control over their energy consumption, costs, and choices has been labeled “energy consumer empowerment.” It does not come without its regulatory challenges, which are the ... -
Facilitating the integration of renewables in Latin America: the role of hydropower generation and other energy storage technologies
Moreno Vieyra, Rodrigo; de Sa Ferreira, Rafael; Nobrega Barroso, Luiz Augusto; Rudnick, Hugh; Pereira Bonvallet, Eduardo (2017-09-01)It is well known that storage facilities can provide value to various electricity sectors through several services, which we group into five main classes. -
Facing uncertainties: the economics of transmission networks
Rudnick, Hugh; Nobrega Barroso, Luiz Augusto (2016-07-01) -
Fighting against wildfires in power systems: lessons and resilient practices from the Chilean and Brazilian experiences
Serrano, Rosa; Carvalho, Martha Martins; Araneda, Juan Carlos; Alamos, Oscar; Nobrega Barroso, Luiz Augusto; Bayma, Daniela; de Sa Ferreira, Rafael; Moreno Vieyra, Rodrigo (2022-01-01)Several extreme wildfires have recently affected many countries worldwide, causing enormous economic and human losses and vastly damaging ecosystems. For example, in January 2017, a highly destructive series of wildfires ... -
Flexibility needed: challenges for future energy storage systems [Guest editorial]
Rudnick, Hugh; Nobrega Barroso, Luiz Augusto (2017-09-01)The articles in this special section focus on the technologies that will support future energy storage systems. In modern power systems, we are transitioning to an increasing penetration of massive low-cost wind and solar ... -
Managing uncertainty in implementation times of competitively-procured transmission via risk-sharing and winner selection functions
de Sa Ferreira, Rafael; Tancredo Borges, Carmen Lucia; Nobrega Barroso, Luiz Augusto (2018-11-01)We develop a MILP framework to optimally design risk-sharingwinner-selection mechanisms, applying a principal-agent approach to bidding processes to select transmission agents, with attention to cases when uncertainties ... -
Measuring the hydroelectric regularization capacity of the Brazilian hydrothermal system
Bezerra, Bernardo Vieira; Nobrega Barroso, Luiz Augusto; Brito, Marcelle; Porrua, Fernando; Flach, Bruno C.; Veiga Pereira, Mario (Sin editorial (Minneapolis, Estados Unidos de América), 2010-07-25)The storage capacity (or “regularization capacity”) of a hydro system refers essentially to its capability of transferring excess inflow energy from wet to dry seasons. The Brazilian hydro power system is formed by hundreds ...