Optimal Investment and Sharing Decisions in Renewable Energy Communities with Multiple Investing Members Inês Carvalho, Jorge Sousa, José Villar, João Lagarto, Carla Viveiros, et al. Energies, 2025 The Renewable Energy Communities (RECs) and self-consumption frameworks defined in Directive (EU) 2023/2413 and Directive (EU) 2024/1711 are currently being integrated into national regulations across EU member states, adapting legislation to incorporate these new entities. These regulations establish key principles for individual and collective self-consumption, outlining operational rules such as proximity constraints, electricity sharing mechanisms, surplus electricity management, grid tariffs, and various organizational aspects, including asset sizing, licensing, metering, data exchange, and role definitions. This study introduces a model tailored to optimize investment and energy-sharing decisions within RECs, enabling multiple members to invest in solar photovoltaic (PV) and wind generation assets. The model determines the optimal generation capacity each REC member should install for each technology and calculates the energy shared between members in each period, considering site-specific constraints on renewable deployment. A case study with a four-member REC is used to showcase the model’s functionality, with simulation results underscoring the benefits of CSC over ISC.
Optimal Bidding Strategies for Electricity Generation Assets in the Day-Ahead, Intraday, and Balancing Markets Miguel Ferreira, Jorge Sousa, João Lagarto International Conference on the European Energy Market Eem, 2025 This study analyses optimal bidding strategies to maximize the profit of power generation plants in various markets, with a focus on the photovoltaic (PV) power plant. Although other technologies, such as thermal and reversible hydroelectric plants, could have been analyzed, PV stands out due to its rapid growth and contribution to sustainability in the energy transition process. The research uses an optimization model, to support the decision process of the participation of the PV in several electricity markets, namely day-ahead, intraday, secondary and tertiary reserves markets, under price-maker and price-taker assumptions. Simulations were carried out for a 24-hour period using real data from the MIBEL with the pricemaker scenario being the most profitable, presenting higher revenues compared to the price-taker.
Alternative Price Clearing Mechanisms for the Day-Ahead Electricity Market to Balance Consumers and Producers Outcomes Bruno Diogo, Jorge Sousa, João Lagarto International Conference on the European Energy Market Eem, 2024 The marginal pricing mechanism, used in European day-ahead electricity markets, has faced criticism on multiple fronts. The shortcomings of the current wholesale electricity market pricing mechanism, notably highlighted during the 2022 energy crisis, have impelled discussions regarding alternative market designs. In this regard, the present study proposes two alternative electricity pricing mechanisms based on the weighted average of the maximum accepted offer price for each technology. These alternative mechanisms aim to decrease the cost burden on consumers while safeguarding producers against significant losses that could refrain their incentives for investing in new generation assets. The effectiveness of the proposed mechanisms was evaluated in the Iberian market, revealing potential monthly consumer surplus increase from €78 million to €830 million with the first pricing mechanism, and from €28 million to €102 million with the second pricing mechanism.
The Iberian Mechanism Impact on the Day-Ahead Electricity Prices and on Consumers and Inframarginal Power Producers Welfare João Marianito, Jorge Sousa, João Lagarto International Conference on the European Energy Market Eem, 2024 In response to the escalation in fossil fuel prices triggered primarily by the conflict in Ukraine, the Governments of Portugal and Spain agreed to create an extraordinary and temporary measure known as the Iberian mechanism. This initiative aimed to alleviate the pressure on electricity prices by detaching them from the fluctuations in natural gas prices. This study investigates the impact of the Iberian mechanism on the day-ahead electricity prices, consumers, and inframarginal producers. The analysis reveals that while consumers have obtained benefits from the mechanism, it has posed challenges for inframarginal producers. Moreover, the reduction in prices within the Iberian market has driven an increase in electricity exports from Spain to France.
Impact of the New Electricity Remuneration Scheme on the Waste-to-Energy Recovery Activity in Portugal Mário Silva, João Lagarto, Jorge Sousa, Feliz Mil-Homens, Carla Viveiros, et al. Energies, 2023 The remuneration scheme for the electricity produced by Waste-to-Energy (WtE) recovery plants has changed recently in Portugal according to 2020 legislation. The new model, linking the electricity remuneration from WtE plants to the spot electricity prices, is expected to bring greater uncertainty in the waste activity, which is a novelty for the sector. In Portugal, Valorsul is the municipal waste treatment entity responsible for the recovery and treatment of municipal solid waste (MSW) produced in 19 municipalities in the Lisbon area. This paper highlights the impact of the new Portuguese electricity remuneration scheme for electricity from waste on Valorsul’s WtE plant. For this purpose, the new remuneration scheme is modeled and simulated based on electricity spot market price scenarios, which are compared with the base case scenario of the former remuneration scheme. Considering different electricity prices for the electricity produced by the WtE plant, the present study anticipates the consequences of the gate-fee of such regulatory changes. Results show that any price changes in the electricity remuneration scheme are offset by equivalent changes in the waste gate-fee. Consequently, the change in the remuneration of the electricity from the WtE plant is, in fact, neutral for the Valorsul accounts and lower revenues from the electricity generation activity of the WtE will negatively impact the gate-fee prices paid by the waste users.
Sustainable energy trading and fair benefit allocation in renewable energy communities: A simulation model for Portugal N Rego, R Castro, J Lagarto Utilities Policy 96, 101986 , 2025 2025 Citations: 7
OPTIMAL BIDDING STRATEGIES FOR ELECTRICITY GENERATION ASSETS IN THE DAY-AHEAD, INTRADAY, AND BALANCING MARKETS J Sousa, M Ferreira, J Lagarto Energy Solutions for a Sustainable and Inclusive Future, 46th IAEE … , 2025 2025
Optimal bidding strategies for electricity generation assets in the Day-Ahead, Intraday, and Balancing Markets M Ferreira, J Sousa, J Lagarto 2025 21st International Conference on the European Energy Market (EEM), 1-10 , 2025 2025
Optimal investment and sharing decisions in renewable energy communities with multiple investing members I Barbosa, JAM Sousa, J Villar, J Lagarto, C Viveiros, F Barata MDPI , 2025 2025
Optimal Investment and Sharing Decisions in Renewable Energy Communities with Multiple Investing Members I Carvalho, J Sousa, J Villar, J Lagarto, C Viveiros, F Barata Energies 18 (8), 1920 , 2025 2025 Citations: 3
Impact of demand flexibility on renewable energy integration, backup capacity, storage use and dispatchable generation: A case study for Portugal's 2030 National Energy plan J Sousa, J Lagarto, F Barata Energy 320, 135270 , 2025 2025 Citations: 17
The role of storage and flexibility in the energy transition: Substitution effect of resources with application to the Portuguese electricity system J Sousa, J Lagarto, M Fonseca Renewable Energy 228, 120694 , 2024 2024 Citations: 21
The Iberian Mechanism Impact on the Day-Ahead Electricity Prices and on Consumers and Inframarginal Power Producers Welfare J Marianito, J Sousa, J Lagarto 2024 20th International Conference on the European Energy Market (EEM), 1-6 , 2024 2024
Alternative Price Clearing Mechanisms for the Day-Ahead Electricity Market to Balance Consumers and Producers Outcomes B Diogo, J Sousa, J Lagarto 2024 20th International Conference on the European Energy Market (EEM), 1-10 , 2024 2024 Citations: 3
Renewable energy communities optimal design supported by an optimization model for investment in PV/wind capacity and renewable electricity sharing J Sousa, J Lagarto, C Camus, C Viveiros, F Barata, P Silva, R Alegria, ... Energy 283, 128464 , 2023 2023 Citations: 117
Impact of the new electricity remuneration scheme on the waste-to-energy recovery activity in portugal M Silva, J Lagarto, J Sousa, F Mil-Homens, C Viveiros, F Barata Energies 16 (18), 6624 , 2023 2023 Citations: 2
SWHORD simulator: A platform to evaluate energy transition targets in future energy systems with increasing renewable generation, electric vehicles, storage technologies, and … J Sousa, J Lagarto, E Carvalho, A Martins Energy 271, 126977 , 2023 2023 Citations: 19
Short-term load forecasting using time series clustering A Martins, J Lagarto, H Canacsinh, F Reis, MGMS Cardoso Optimization and Engineering 23 (4), 2293-2314 , 2022 2022 Citations: 15
Renewable energy generation, electric vehicles, storage technologies, and hydrogen for mobility–contribution to the 2030 Portuguese energy and climate targets A Lopes, J Sousa, C Camus, J Lagarto 2022 18th International Conference on the European Energy Market (EEM), 1-7 , 2022 2022 Citations: 5
Financial performance of the solar PV projects approved under the 2020 Portuguese auction H Marques, J Sousa, C Camus, J Lagarto 2022 18th International Conference on the European Energy Market (EEM), 1-6 , 2022 2022
Demand response model for hardware implementation B Capitão, J Lagarto, R Pereira, P Almeida, PM Fonte 2020 International Young Engineers Forum (YEF-ECE), 33-37 , 2020 2020 Citations: 2
Profiling clusters of European electricity markets MGMS Cardoso, A Martins, J Lagarto Program and Book of Abstracts XXVII Meeting of the Portuguese Association … , 2020 2020
Assessing electric vehicle CO2 emissions in the Portuguese power system using a marginal generation approach EF Carvalho, JA Sousa, JH Lagarto International Journal of Sustainable Energy Planning and Management 26, 47-66 , 2020 2020 Citations: 16
Electricity market price analysis using time series clustering A Martins, J Lagarto, MGMS Cardoso 2019 16th International Conference on the European Energy Market (EEM), 1-6 , 2019 2019 Citations: 4
Combining various dissimilarity measures for clustering electricity market prices MGMS Cardoso, AAAF Martins, J Lagarto Estatística: Desafios Transversais às Ciências com Dados. Atas do XXIV … , 2019 2019 Citations: 8
MOST CITED SCHOLAR PUBLICATIONS
Renewable energy communities optimal design supported by an optimization model for investment in PV/wind capacity and renewable electricity sharing J Sousa, J Lagarto, C Camus, C Viveiros, F Barata, P Silva, R Alegria, ... Energy 283, 128464 , 2023 2023 Citations: 117
Multi-agent electricity markets: Retailer portfolio optimization using Markowitz theory H Algarvio, F Lopes, J Sousa, J Lagarto Electric Power Systems Research 148, 282-294 , 2017 2017 Citations: 81
Market power analysis in the Iberian electricity market using a conjectural variations model J Lagarto, JAM Sousa, Á Martins, P Ferrão Energy 76, 292-305 , 2014 2014 Citations: 39
Price forecasting in the day-ahead Iberian electricity market using a conjectural variations ARIMA model J Lagarto, J De Sousa, A Martins, P Ferrao 2012 9th International Conference on the European Energy Market, 1-7 , 2012 2012 Citations: 34
The role of storage and flexibility in the energy transition: Substitution effect of resources with application to the Portuguese electricity system J Sousa, J Lagarto, M Fonseca Renewable Energy 228, 120694 , 2024 2024 Citations: 21
SWHORD simulator: A platform to evaluate energy transition targets in future energy systems with increasing renewable generation, electric vehicles, storage technologies, and … J Sousa, J Lagarto, E Carvalho, A Martins Energy 271, 126977 , 2023 2023 Citations: 19
Impact of demand flexibility on renewable energy integration, backup capacity, storage use and dispatchable generation: A case study for Portugal's 2030 National Energy plan J Sousa, J Lagarto, F Barata Energy 320, 135270 , 2025 2025 Citations: 17
Assessing electric vehicle CO2 emissions in the Portuguese power system using a marginal generation approach EF Carvalho, JA Sousa, JH Lagarto International Journal of Sustainable Energy Planning and Management 26, 47-66 , 2020 2020 Citations: 16
Short-term load forecasting using time series clustering A Martins, J Lagarto, H Canacsinh, F Reis, MGMS Cardoso Optimization and Engineering 23 (4), 2293-2314 , 2022 2022 Citations: 15
Multi-market optimal scheduling of a power generation portfolio with a price-maker pumped-storage hydro unit J Lagarto, F Fernandes, JAM Sousa, J Santana 2016 13th International Conference on the European Energy Market (EEM), 1-5 , 2016 2016 Citations: 14
Optimal scheduling of a pumped storage hydro unit in the day-ahead and secondary reserve electricity market J Lagarto, F Fernandes, JAM Sousa, J Santana, B Martins 2015 12th International Conference on the European Energy Market (EEM), 1-5 , 2015 2015 Citations: 14
Combining various dissimilarity measures for clustering electricity market prices MGMS Cardoso, AAAF Martins, J Lagarto Estatística: Desafios Transversais às Ciências com Dados. Atas do XXIV … , 2019 2019 Citations: 8
Optimizing the Renewable Generation Mix in the Portuguese Power System based on Temporal and Spatial Diversity JP R. Ferreira, J. Sousa, J. Lagarto, A. Martins 11th International Conference - The European Energy Market , 2014 2014 Citations: 8
Sustainable energy trading and fair benefit allocation in renewable energy communities: A simulation model for Portugal N Rego, R Castro, J Lagarto Utilities Policy 96, 101986 , 2025 2025 Citations: 7
The impact of the Iberian electricity market on the competitive behavior of generating companies using a conjectural variations approach J Lagarto, J de Sousa, Á Martins 2010 7th International Conference on the European Energy Market, 1-9 , 2010 2010 Citations: 7
How market players aadjusted their strategic behaviour taking into account the CO2 emission costs-an application to the spanish electricity market J Sousa, J Lagarto Proceedings of the 4th International Conference on the European Electricity … , 2007 2007 Citations: 7
Power producers trading electricity in both pool and forward markets H Algarvio, F Lopes, JAM Sousa, J Lagarto 2014 25th International Workshop on Database and Expert Systems Applications … , 2014 2014 Citations: 6
Renewable energy generation, electric vehicles, storage technologies, and hydrogen for mobility–contribution to the 2030 Portuguese energy and climate targets A Lopes, J Sousa, C Camus, J Lagarto 2022 18th International Conference on the European Energy Market (EEM), 1-7 , 2022 2022 Citations: 5
A trader portfolio optimization of bilateral contracts in electricity retail markets H Algarvio, F Lopes, JAM Sousa, J Lagarto 2014 25th International Workshop on Database and Expert Systems Applications … , 2014 2014 Citations: 5
Electricity market price analysis using time series clustering A Martins, J Lagarto, MGMS Cardoso 2019 16th International Conference on the European Energy Market (EEM), 1-6 , 2019 2019 Citations: 4