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Identification

Personal identification

Full name
Manuel António Cerqueira da Costa Matos

Author identifiers

Ciência ID
5613-1F3F-5273
ORCID iD
0000-0002-8207-2686
Education
Degree Classification
1996
Concluded
 engenharia electrotécnica (Título de Agregado)
Universidade do Porto Faculdade de Engenharia, Portugal
 Aprovado
1988
Concluded
 Engenharia Electrotécnica (Doutoramento)
Universidade do Porto Faculdade de Engenharia, Portugal
 Distinção e louvor
1977
Concluded
 Engenharia Electrotécnica (Licenciatura)
Universidade do Porto Faculdade de Engenharia, Portugal
 17 valores
Affiliation

Science

Category
Host institution 		Employer
1996 - Current Science and Technology Management Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
1985 - Current Researcher (Research) Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal

Teaching in Higher Education

Category
Host institution 		Employer
2000 - 2022/05/01 Full Professor (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
1993/02/26 - 2000/08/28 Associate Professor (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Universidade do Porto Faculdade de Engenharia, Portugal
1988/07/01 - 1993/02/25 Assistant Professor (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Universidade do Porto Faculdade de Engenharia, Portugal
1980/04/08 - 1988/06/30 Assistant (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Universidade do Porto Faculdade de Engenharia, Portugal
1978/04/08 - 1980/04/07 Trainee Assistant (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Universidade do Porto Faculdade de Engenharia, Portugal
Projects

Grant

Designation Funders
2015/01/01 - 2018/12/31 Storage-Enabled Sustainable Energy for Buildings and Communities
645963
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 EU Framework Programme for Research and Innovation Science with and for Society
Concluded
2013/01/01 - 2016/03/31 Smart Distribution System OperaTion for MAximizing the INtegration of RenewABLE Generation
308755
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 European Commission Seventh Framework Programme for Research and Technological Development
Concluded
2013/09/01 - 2015/12/31 evolvDSO - Development of methodologies and tools for new and evolving DSO roles for efficient DRES integration in distribution networks
608732
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 European Commission Seventh Framework Programme for Research and Technological Development Energy
Concluded
2008/01/01 - 2011/06/30 Advanced tools for the management of electricity grids with large-scale wind generation
38692
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 European Commission Sixth Framework Programme
Concluded
2006/01/01 - 2009/12/31 Advanced Architectures and Control Concepts for More Microgrids
19864
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 European Commission Sixth Framework Programme
Concluded
1997/02/01 - 1999/07/31 Advanced control advice for power systems with large scale integration of renewable energy source
FP4-NNE-JOULE C
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 European Commission
Concluded

Contract

Designation Funders
2017/01/01 - 2020/12/31 Enhancing Smart GRIDs for Sustainability
SAICTPAC/0004/2015
Instituto de Engenharia de Sistemas e Computadores, Portugal

Universidade do Minho, Portugal

Universidade da Beira Interior, Portugal

Universidade de Coimbra Instituto de Engenharia de Sistemas e Computadores de Coimbra, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2016/04/01 - 2019/03/31 Planning Guidelines, Smart Grid, Smart Market, Demand Response, Operation Guidelines, European Smart Distribution Systems
SmartGP/0002/2015
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2015/01/01 - 2017/12/31 SusCity: Urban data driven models for creative and resourceful urban transitions
MITP-TB/CS/0026/2013
Principal investigator
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2010 - 2013 COORDINATOR: High-performance hybrid algorithms for wind-hydrothermal power production coordination
PTDC/EGE-GES/099120/2008
Researcher
Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2009/04/01 - 2012/06/30 Power demand estimation and power system impacts resulting of fleet penetration of electric/plug-in vehicles
MIT-Pt/SES-GI/0008/2008
Universidade de Lisboa Instituto Superior Técnico, Portugal

Instituto de Engenharia Mecânica, Portugal

Instituto de Engenharia de Sistemas e Computadores, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2005/07/01 - 2008/11/10 The Impact of the Iberian Electricity Market on the Companies' Performance and Long-Term Security of Supply: A Simulation Analysis
POCI/EGE/61555/2004
Instituto de Engenharia de Sistemas e Computadores, Portugal

Universidade do Porto Faculdade de Economia, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
Outputs

Publications

Book
  1. Matos, M.; Bessa, R.; Botterud, A.; Zhou, Z.. Forecasting and setting power system operating reserves. 2017.
    10.1016/B978-0-08-100504-0.00011-1
  2. Barin, A.; Canha, L.N.; Magnago, K.M.; Matos, M.A.; Wottrich, B.. A novel fuzzy-based methodology for biogas fuelled hybrid energy systems decision making. 2011.
    10.1007/978-3-642-22176-7_7
  3. Holttinen, H.; Meibom, P.; Orths, A.; Hulle, F.V.; Lange, B.; O'Malley, M.; Pierik, J.; et al. Design and operation of power systems with large amounts of wind power. 2009.
  4. Matos, M.; Dimitrovski, A.. Case studies using fuzzy equivalent annual worth analysis. 2008.
    10.1007/978-3-540-70810-0_5
  5. Dimitrovski, A.; Matos, M.. Fuzzy present worth analysis with correlated and uncorrelated cash flows. 2008.
    10.1007/978-3-540-70810-0_2
  6. Fidalgo, J.N.; Matos, M.A.. Forecasting Portugal global load with artificial neural networks. 2007.
    10.1007/978-3-540-74695-9_75
  7. Viana, A.; Sousa, J.P.; Matos, M.A.. Constraint oriented neighbourhoods - A new search strategy in metaheuristics. 2005.
    10.1007/0-387-25383-1_18
  8. Fidalgo, J.N.; Matos, M.A.; Ponce De Leao, M.T.. Assessing error bars in distribution load curve estimation. 1997.
    10.1007/bfb0020286
Book chapter
  1. Bessa, R; Moreira, C; Silva, B; Matos, M. "Handling Renewable Energy Variability and Uncertainty in Power System Operation". 2019.
    10.1002/9781119508311.ch1
  2. Matos, MA; Seca, L; Madureira, AG; Soares, FJ; Bessa, RJ; Pereira, J; Peças Lopes, J. "Control and Management Architectures". 2016.
    10.1002/9781118755471.sgd058
Conference paper
  1. Rui Pinto de Sousa; Carlos Moreira; Leonel Carvalho; Manuel Matos. "Including Dynamic Security Constraints in Isolated Power Systems Unit Commitment/Economic Dispatch: a Machine Learning-based Approach". 2023.
    10.1109/PowerTech55446.2023.10202690
  2. Oliveira, C; Simoes, M; Soares, T; Matos, MA; Bitencourt, L. "Full distributed P2P market and distribution network operation based on ADMM: Testing and evaluation". 2023.
    10.1109/eem58374.2023.10161989
  3. Teixeira, H; Lopes, JAP; Matos, MA. "Operational Management of Medium Voltage and Low Voltage Networks under a Smart Grid Environment". 2021.
    10.1109/powertech46648.2021.9494843
  4. Monteiro, V; Soares, T; Lopes, JP; Matos, M; Afonso, JL. "Interfacing Power Electronics Systems for Smart Grids: Innovative Perspectives of Unified Systems and Operation Modes". 2021.
    10.1109/iecon48115.2021.9589903
  5. Pereira, CAN; Pecas Lopes, JAP; Matos, MACC. "Assessment of the Distributed Generation Hosting Capacity Incorporating Harmonic Distortion Limits". 2018.
    10.1109/sest.2018.8495843
  6. Pinto, R.; Matos, M.A.; Bessa, R.J.; Gouveia, J.; Gouveia, C.. "Multi-period modeling of behind-the-meter flexibility". 2017.
    10.1109/ptc.2017.7980956
  7. Iria, JP; Soares, FJ; Matos, MA. "Trading Small Prosumers Flexibility in the Day-ahead Energy Market". 2017.
    10.1109/pesgm.2017.8274488
  8. Matos, M.A.; Bessa, R.J.; Goncalves, C.; Cavalcante, L.; Miranda, V.; Machado, N.; Marques, P.; Matos, F.. "Setting the maximum import net transfer capacity under extreme RES integration scenarios". 2016.
    10.1109/PMAPS.2016.7764145
  9. Ferreira, R.; Matos, M.; Lopes, J.P.. "Regulatory issues in the deployment of distributed storage devices in distribution networks". 2016.
    10.1109/EEM.2016.7521253
  10. Silva, A.; Carvalho, L.; Bessa, R.; Sumaili, J.; Seca, L.; Schaarschmidt, G.; Silva, J.; Matos, M.; Hermes, R.. "Assessing DER flexibility in a German distribution network for different scenarios and degrees of controllability". 2016.
    10.1049/cp.2016.0801
  11. Fonseca, N.; Silva, J.; Silva, A.; Sumaili, J.; Seca, L.; Bessa, R.; Pereira, J.; et al. "EvolvDSO grid management tools to support TSO-DSO cooperation". 2016.
    10.1049/cp.2016.0672
  12. Carvalho, L.M.; Teixeira, J.; Matos, M.. "Modeling wind power uncertainty in the long-term operational reserve adequacy assessment: A comparative analysis between the Naïve and the ARIMA forecasting models". 2016.
    10.1109/pmaps.2016.7764083
  13. Coelho, A.; Matos, M.. "Impact of self-production in the operation and regulation of distribution networks". 2016.
  14. Pereira, J.; Alves, J.; Matos, M.. "Optimization of electrical distribution network operation based on EPSO". 2015.
    10.1109/isap.2015.7325549
  15. Heleno, M.; Soares, R.; Sumaili, J.; Bessa, R.J.; Seca, L.; Matos, M.A.. "Estimation of the flexibility range in the transmission-distribution boundary". 2015.
    10.1109/ptc.2015.7232524
  16. Heleno, M.; Rua, D.; Gouveia, C.; Madureira, A.; Matos, M.A.; Lopes, J.P.; Silva, N.; Salustio, S.. "Optimizing PV self-consumption through electric water heater modeling and scheduling". 2015.
    10.1109/PTC.2015.7232636
  17. Heleno, M.; Matos, M.A.; Pecas Lopes, J.A.; Iria, J.P.. "Estimating the flexible residential load using appliances availability". 2014.
    10.1109/peoco.2014.6814453
  18. Bessa, R.J.; Matos, M.A.; Soares, F.J.. "Framework for the participation of EV aggregators in the electricity market". 2014.
    10.1109/IEVC.2014.7056228
  19. Bremermann, L.E.; Da Rosa, M.A.; Matos, M.; Lopes, J.A.P.; Carvalho, L.M.; Costa, I.C.. "Adequacy of the long-term operational reserve of a system with wind power and electric vehicles under severe scenarios". 2014.
    10.1109/pmaps.2014.6960666
  20. Heleno, M.; Meirinhos, J.; Sumaili, J.; Da Rosa, M.A.; Matos, M.A.. "Impact assessment of a massive integration of electric vehicles through the fuzzy power flow analysis". 2014.
    10.1049/cp.2014.1646
  21. Heleno, M.; Matos, M.A.; Lopes, J.A.P.. "Availability of thermal loads to provide reserve services". 2013.
    10.1109/ptc.2013.6652339
  22. Martins, J.C.; Da Silva, J.R.; Santos, C.A.; Branco, F.C.; Nuno Fidalgo, J.; Matos, M.A.; Couto, M.J.. "Assessment of the investment effort in HV and MV networks to reduce energy losses". 2013.
    10.1049/cp.2013.1234
  23. Bessa, R.J.; Lima, N.; Matos, M.A.. "Operational management algorithms for an EV aggregator". 2012.
    10.1049/cp.2012.2037
  24. Bessa, R.J.; Matos, M.A.. "Forecasting issues for managing a portfolio of electric vehicles under a smart grid paradigm". 2012.
    10.1109/ISGTEurope.2012.6465724
  25. Bessa, R.J.; Costa, I.C.; Bremermann, L.; Matos, M.A.. "Operational strategies for the optimized coordination of wind farms and hydro-pump units". 2012.
    10.1049/cp.2012.2036
  26. Da Silva, A.M.L.; Rosa, M.A.; Sales, W.S.; Matos, M.. "Long term evaluation of operating reserve with high penetration of renewable energy sources". 2011.
    10.1109/PES.2011.6039333
  27. Da Silva, M.M.; Lopes, J.A.P.; Matos, M.A.. "Multicriteria decision aid for planning energy storage and sustainable mobility - The São Miguel Island case study". 2011.
    10.1109/PTC.2011.6019148
  28. Bessa, R.J.; Soares, F.J.; Peças Lopes, J.A.; Matos, M.A.. "Models for the EV aggregation agent business". 2011.
    10.1109/PTC.2011.6019221
  29. Da Rosa, M.A.; Heleno, M.; Miranda, V.; Matos, M.; Ferreira, R.. "Reliability impact on bulk generation system considering high penetration of electric vehicles". 2011.
    10.1109/ptc.2011.6019388
  30. Bessa, R.J.; Matos, M.A.. "Comparison of probabilistic and deterministic approaches for setting operating reserve in systems with high penetration of wind power". 2010.
    10.1049/cp.2010.0867
  31. Bessa, R.J.; Matos, M.A.. "The role of an aggregator agent for EV in the electricity market". 2010.
    10.1049/cp.2010.0866
  32. Fidalgo, J.N.; Matos, M.A.; Jorge, H.. "Deriving loss profiles for market purposes". 2010.
    10.1049/cp.2010.0861
  33. Matos, M.A.; Bessa, R.. "Operating reserve adequacy evaluation using uncertainties of wind power forecast". 2009.
    10.1109/ptc.2009.5282039
  34. Vasiljevska, J.; Peças Lopes, J.A.; Matos, M.A.. "Multi-microgrid impact assessment using multi criteria decision aid methods". 2009.
    10.1109/PTC.2009.5282054
  35. Da Rosa, M.A.; Miranda, V.; Matos, M.; Sheblé, G.; Da Silva, A.M.L.. "Intelligent agent-based environment to coordinate maintenance schedule discussions". 2009.
    10.1109/isap.2009.5352826
  36. Peças Lopes, J.A.; Matos, M.A.; Gomes Cabral, P.H.; Sampaio Ferreira, M.P.; Fidalgo Martins, N.M.; Artaiz Wert, C.J.; Soto Martos, F.; et al. "Dealing with intermittent generation in the long-term evaluation of system adequacy and operational reserve requirements in the Iberian peninsula". 2008.
  37. Matos, M.; Lopes, J.P.; Rosa, M.; Ferreira, R.; Da Silva, A.L.; Sales, W.; Resende, L.; et al. "Probabilistic evaluation of reserve requirements of generating systems with renewable power sources: The Portuguese and Spanish cases". 2008.
  38. Costa, P.M.; Matos, M.A.; Peças Lopes, J.A.. "A regulatory framework for microgeneration and microgrids". 2007.
    10.1109/PCT.2007.4538390
  39. Fidalgo, J.N.; Torres, J.A.F.M.; Matos, M.. "Fair allocation of distribution losses based on neural networks". 2007.
    10.1109/ISAP.2007.4441685
  40. Gouveia, E.; Matos, M.A.. "Constrained fuzzy power flow". 2007.
    10.1109/PCT.2007.4538506
  41. Khodr, H.M.; Matos, M.A.; Pereira, J.. "Distribution optimal power flow". 2007.
    10.1109/PCT.2007.4538527
  42. Khodr, H.M.; Zerpa, I.J.; De Oliveira-De Jesús, P.M.; Matos, M.A.. "Optimal phase balancing in distribution system using mixed-integer linear programming". 2006.
    10.1109/TDCLA.2006.311368
  43. Costa, P.M.; Matos, M.A.. "Economic analysis of microgrids including reliability aspects". 2006.
    10.1109/PMAPS.2006.360236
  44. Faria, J.A.; Matos, M.A.; Nunes, E.M.. "Integrated reliability management in industrial production systems". 2006.
  45. Nunes, E.M.; Faria, J.A.; Matos, M.A.. "Using fuzzy sets to evaluate the performance of complex systems when parameters are uncertain". 2006.
  46. Matos, M.A.; Fidalgo, J.N.; Ribeiro, L.F.. "Deriving LV load diagrams for market purposes using commercial information". 2005.
    10.1109/isap.2005.1599248
  47. Matos, M.A.; Gouveia, E.. "The fuzzy power flow revisited". 2005.
    10.1109/PTC.2005.4524683
  48. Costa, P.M.; Matos, M.A.. "Reliability of distribution networks with microgrids". 2005.
    10.1109/PTC.2005.4524611
  49. Nunes, E.; Matos, M.A.; Faria, J.; Da Silva, J.P.. "Non-markovian estimation of the reliability costs of power distribution systems". 2004.
  50. Saraiva, J.T.; Fonseca, N.; Matos, M.A.. "Fuzzy power flow - An AC model addressing correlated data". 2004.
  51. Yu, W.; Sheblé, G.B.; Matos, M.A.. "Application of Markov chain models for short term generation assets valuation". 2004.
  52. Leite Da Silva, A.M.; Manso, L.A.F.; Sales, W.S.; Resende, L.C.; Aguiar, M.J.Q.; Matos, M.A.; Lopes, J.A.P.; Miranda, V.. "Application of Monte Carlo simulation to generating system well-being analysis considering renewable sources". 2004.
  53. Gouveia, E.M.; Matos, M.A.. "Operational reserve of a power system with a large amount of wind power". 2004.
  54. Matos, MA; de Leao, MTP; Saraiva, JT; Fidalgo, JN; Miranda, V; Lopes, JP; Ferreira, JR; et al. "Metaheuristics applied to power systems". 2004.
    10.1007/978-1-4757-4137-7_21
  55. Matos, M.A.. "A new power flow method for radial networks". 2003.
    10.1109/PTC.2003.1304335
  56. Hatziargyriou, N.; Contaxis, G.; Matos, M.; Pecas Lopes, J.A.; Kariniotakis, G.; Mayer, D.; Halliday, J.; et al. "Energy management and control of island power systems with increased penetration from renewable sources". 2002.
  57. Hatziargyriou, N.; Contaxis, G.; Matos, M.; Peças Lopes, J.A.; Vasconcelos, M.H.; Kariniotakis, G.; Mayer, D.; et al. "Preliminary results from the MORE advanced control advice project for secure operation of isolated power systems with increased renewable energy penetration and storage". 2001.
    10.1109/ptc.2001.964855
  58. Matos, M.A.; Melo, P.. "Loss minimization in distribution networks with multiple load scenarios". 2001.
    10.1109/PTC.2001.964940
  59. Viana, A.; De Sousa, J.P.; Matos, M.. "Simulated Annealing for the Unit Commitment problem". 2001.
    10.1109/ptc.2001.964747
  60. Hatziargyriou, N.; Contaxis, G.; Papadopoulos, M.; Papadias, B.; Matos, M.A.; Peças Lopes, J.A.; Nogaret, E.; et al. "Operation and control of island systems - The Crete case". 2000.
    10.1109/PESW.2000.850084
  61. Miranda, V.; Matos, M.; Lopes, J.P.; Saraiva, J.T.; Fidalgo, J.N.; Ponce De Leão, M.T.. "Intelligent tools in a real-world DMS environment". 2000.
  62. Ponce de Leao, M.T.; Matos, M.A.. "Fuzzy models for producers from natural resources". 1998.
  63. de Leao, M.T.Ponce; Matos, M.A.. "Distribution planning with fuzzy loads and independent generation". 1997.
  64. Saraiva, J.Tome; Miranda, Vladimiro; Matos, Manuel A.C.C.. "Generation and load uncertainties incorporated in load flow studies". 1991.
  65. MATOS, MA; LOPES, JAP; BARBOSA, FPM. "FUZZY CLASSIFICATION FOR ONLINE TRANSIENT STABILITY ASSESSMENT OF ELECTRIC-POWER SYSTEMS". 1990.
  66. MIRANDA, V; MATOS, MACC; SARAIVA, JT. "FUZZY LOAD FLOW - NEW ALGORITHMS INCORPORATING UNCERTAIN GENERATION AND LOAD REPRESENTATION". 1990.
  67. Miranda, Vladimiro; Matos, Manuel A.C.C.. "Distribution system planning with fuzzy models and techniques". 1989.
Journal article
  1. A. Sérgio Faria; Tiago Soares; Tommaso Orlandini; Catarina Oliveira; Tiago Sousa; Pierre Pinson; Manuel Matos. "P2P market coordination methodologies with distribution grid management". Sustainable Energy, Grids and Networks (2023): https://doi.org/10.1016/j.segan.2023.101075.
    10.1016/j.segan.2023.101075
  2. Sara Capelo; Tiago Soares; Isabel Azevedo; Wellington Fonseca; Manuel A. Matos. "Design of an Energy Policy for the Decarbonisation of Residential and Service Buildings in Northern Portugal". Energies (2023): https://doi.org/10.3390/en16052239.
    10.3390/en16052239
  3. Carlos Oliveira; Micael Simões; Leonardo Bitencourt; Tiago Soares; Manuel A. Matos. "Distributed Network-Constrained P2P Community-Based Market for Distribution Networks". Energies (2023): https://doi.org/10.3390/en16031520.
    10.3390/en16031520
  4. Luis Dias; Miguel Ribeiro; Armando Leitão; Luis Guimarães; Leonel Carvalho; Manuel A. Matos; Ricardo J. Bessa. "An unsupervised approach for fault diagnosis of power transformers". Quality and Reliability Engineering International (2021): https://doi.org/10.1002/qre.2892.
    10.1002/qre.2892
  5. Tostado Veliz, M; Matos, MA; Lopes, JAP; Jurado, F. "An improved version of the Continuous Newton's method for efficiently solving the Power-Flow in Ill-conditioned systems". INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS (2021):
    10.1016/j.ijepes.2020.106389
  6. Pinto, R; Bessa, RJ; Sumaili, J; Matos, MA. "Distributed multi-period three-phase optimal power flow using temporal neighbors". Electric Power Systems Research (2020):
    10.1016/j.epsr.2020.106228
  7. Faria, AS; Soares, T; Sousa, T; Matos, MA. "Participation of an EV Aggregator in the Reserve Market through Chance-Constrained Optimization". ENERGIES (2020):
    10.3390/en13164071
  8. Selim, A; Kamel, S; Jurado, F; Lopes, JAP; Matos, M. "Optimal setting of PV and battery energy storage in radial distribution systems using multi-objective criteria with fuzzy logic decision-making". IET GENERATION TRANSMISSION & DISTRIBUTION (2020):
    10.1049/gtd2.12019
  9. Iria, J; Soares, F; Matos, M. "Optimal bidding strategy for an aggregator of prosumers in energy and secondary reserve markets". APPLIED ENERGY (2019):
    10.1016/j.apenergy.2019.01.191
  10. Iria, JP; Soares, FJ; Matos, MA. "Trading Small Prosumers Flexibility in the Energy and Tertiary Reserve Markets". IEEE TRANSACTIONS ON SMART GRID (2019):
    10.1109/tsg.2018.2797001
  11. Joao Silva; Jean Sumaili; Ricardo J. Bessa; Luis Seca; Manuel A. Matos; Vladimiro Miranda; Mathieu Caujolle; et al. "Estimating the Active and Reactive Power Flexibility Area at the TSO-DSO Interface". IEEE Transactions on Power Systems 33 5 (2018): 4741-4750. https://doi.org/10.1109/TPWRS.2018.2805765.
    10.1109/TPWRS.2018.2805765
  12. Nuno Fonseca; André Madureira; João Peças Lopes; Manuel Matos. "Dimensioning Studies for Reversible Hydro Power Plants in Portuguese Islands". U.Porto Journal of Engineering (2018): https://doi.org/10.24840/2183-6493_004.001_0007.
    10.24840/2183-6493_004.001_0007
  13. Villar, J.; Bessa, R.; Matos, M.. "Flexibility products and markets: Literature review". Electric Power Systems Research 154 (2018): 329-340. http://www.scopus.com/inward/record.url?eid=2-s2.0-85029391307&partnerID=MN8TOARS.
    10.1016/j.epsr.2017.09.005
  14. Iria, J; Soares, F; Matos, M. "Erratum to “Optimal supply and demand bidding strategy for an aggregator of small prosumers” [Appl. Energy 213 (2018) 658–669]". Applied Energy (2018):
    10.1016/j.apenergy.2018.04.036
  15. Pinto, R.; Bessa, R.J.; Matos, M.A.. "Multi-period flexibility forecast for low voltage prosumers". Energy 141 (2017): 2251-2263. http://www.scopus.com/inward/record.url?eid=2-s2.0-85037652225&partnerID=MN8TOARS.
    10.1016/j.energy.2017.11.142
  16. Iria, J.; Soares, F.; Matos, M.. "Optimal supply and demand bidding strategy for an aggregator of small prosumers". Applied Energy (2017): http://www.scopus.com/inward/record.url?eid=2-s2.0-85029840081&partnerID=MN8TOARS.
    10.1016/j.apenergy.2017.09.002
  17. Silva, J.; Sumaili, J.; Bessa, R.J.; Seca, L.; Matos, M.; Miranda, V.. "The challenges of estimating the impact of distributed energy resources flexibility on the TSO/DSO boundary node operating points". Computers and Operations Research (2017): http://www.scopus.com/inward/record.url?eid=2-s2.0-85020737135&partnerID=MN8TOARS.
    10.1016/j.cor.2017.06.004
  18. Olival, P.C.; Madureira, A.G.; Matos, M.. "Advanced voltage control for smart microgrids using distributed energy resources". Electric Power Systems Research 146 (2017): 132-140. http://www.scopus.com/inward/record.url?eid=2-s2.0-85010791746&partnerID=MN8TOARS.
    10.1016/j.epsr.2017.01.027
  19. Pinto, R; Bessa, RJ; Matos, MA. "Surrogate Model of Multi-Period Flexibility from a Home Energy Management System". CoRR (2017):
  20. Heleno, M.; Matos, M.A.; Lopes, J.A.P.. "A bottom-up approach to leverage the participation of residential aggregators in reserve services markets". Electric Power Systems Research 136 (2016): 425-433. http://www.scopus.com/inward/record.url?eid=2-s2.0-84962427411&partnerID=MN8TOARS.
    10.1016/j.epsr.2016.03.025
  21. Vieira, B.; Viana, A.; Matos, M.; Pedroso, J.P.. "A multiple criteria utility-based approach for unit commitment with wind power and pumped storage hydro". Electric Power Systems Research 131 (2016): 244-254. http://www.scopus.com/inward/record.url?eid=2-s2.0-84947237399&partnerID=MN8TOARS.
    10.1016/j.epsr.2015.10.024
  22. Heleno, M; Matos, MA; Lopes, JAP; Heleno, M.; Matos, M. A.; Lopes, J. A. P.. "Availability and Flexibility of Loads for the Provision of Reserve". IEEE TRANSACTIONS ON SMART GRID (2015): http://www.scopus.com/inward/record.url?eid=2-s2.0-84912120736&partnerID=MN8TOARS.
    10.1109/tsg.2014.2368360
  23. Bremermann, L.E.; Matos, M.; Lopes, J.A.P.; Rosa, M.. "Electric vehicle models for evaluating the security of supply". Electric Power Systems Research 111 (2014): 32-39. http://www.scopus.com/inward/record.url?eid=2-s2.0-84894626283&partnerID=MN8TOARS.
    10.1016/j.epsr.2014.02.001
  24. Castronuovo, E.D.; Usaola, J.; Bessa, R.; Matos, M.; Costa, I.C.; Bremermann, L.; Lugaro, J.; Kariniotakis, G.. "An integrated approach for optimal coordination of wind power and hydro pumping storage". Wind Energy 17 6 (2014): 829-852. http://www.scopus.com/inward/record.url?eid=2-s2.0-84898445395&partnerID=MN8TOARS.
    10.1002/we.1600
  25. Bessa, R.J.; Matos, M.A.. "Optimization models for an EV aggregator selling secondary reserve in the electricity market". Electric Power Systems Research 106 (2014): 36-50. http://www.scopus.com/inward/record.url?eid=2-s2.0-84883808080&partnerID=MN8TOARS.
    10.1016/j.epsr.2013.08.006
  26. Bessa, R.; Moreira, C.; Silva, B.; Matos, M.. "Handling renewable energy variability and uncertainty in power systems operation". Wiley Interdisciplinary Reviews: Energy and Environment 3 2 (2014): 156-178. http://www.scopus.com/inward/record.url?eid=2-s2.0-84893810819&partnerID=MN8TOARS.
    10.1002/wene.76
  27. Vasiljevska, J.; Peças Lopes, J.A.; Matos, M.A.. "Integrated micro-generation, load and energy storage control functionality under the multi micro-grid concept". Electric Power Systems Research 95 (2013): 292-301. http://www.scopus.com/inward/record.url?eid=2-s2.0-84868307470&partnerID=MN8TOARS.
    10.1016/j.epsr.2012.09.014
  28. Bessa, R.J.; Matos, M.A.. "Optimization models for EV aggregator participation in a manual reserve market". IEEE Transactions on Power Systems 28 3 (2013): 3085-3095. http://www.scopus.com/inward/record.url?eid=2-s2.0-84880923590&partnerID=MN8TOARS.
    10.1109/TPWRS.2012.2233222
  29. Bessa, R.J.; Matos, M.A.. "Global against divided optimization for the participation of an EV aggregator in the day-ahead electricity market. Part I: Theory". Electric Power Systems Research 95 (2013): 319-329. http://www.scopus.com/inward/record.url?eid=2-s2.0-84870434381&partnerID=MN8TOARS.
    10.1016/j.epsr.2012.08.007
  30. Barin, A.; Canha, L.N.; Abaide, A.D.R.; Magnago, K.F.; Matos, M.A.; Orling, R.B.. "A novel fuzzy-based expert system for RET selection". Journal of Intelligent and Fuzzy Systems 25 2 (2013): 325-333. http://www.scopus.com/inward/record.url?eid=2-s2.0-84878886724&partnerID=MN8TOARS.
    10.3233/IFS-2012-0639
  31. Vasiljevska, J.; Lopes, J.P.; Matos, M.A.. "Evaluating the Interest in Installing Microgrid Solutions". Electricity Journal 25 8 (2012): 61-70. http://www.scopus.com/inward/record.url?eid=2-s2.0-84869869498&partnerID=MN8TOARS.
    10.1016/j.tej.2012.10.001
  32. Vasiljevska, J.; Peças Lopes, J.A.; Matos, M.A.. "Evaluating the impacts of the multi-microgrid concept using multicriteria decision aid". Electric Power Systems Research 91 (2012): 44-51. http://www.scopus.com/inward/record.url?eid=2-s2.0-84861469557&partnerID=MN8TOARS.
    10.1016/j.epsr.2012.04.013
  33. Bessa, R.J.; Matos, M.A.. "Economic and technical management of an aggregation agent for electric vehicles: A literature survey". European Transactions on Electrical Power 22 3 (2012): 334-350. http://www.scopus.com/inward/record.url?eid=2-s2.0-84860261138&partnerID=MN8TOARS.
    10.1002/etep.565
  34. Fidalgo, J.N.; Matos, M.A.; Ribeiro, L.. "A new clustering algorithm for load profiling based on billing data". Electric Power Systems Research 82 1 (2012): 27-33. http://www.scopus.com/inward/record.url?eid=2-s2.0-80052843159&partnerID=MN8TOARS.
    10.1016/j.epsr.2011.08.016
  35. Bessa, R.J.; Matos, M.A.; Soares, F.J.; Lopes, J.A.P.. "Optimized bidding of a EV aggregation agent in the electricity market". IEEE Transactions on Smart Grid 3 1 (2012): 443-452. http://www.scopus.com/inward/record.url?eid=2-s2.0-84857651992&partnerID=MN8TOARS.
    10.1109/tsg.2011.2159632
  36. Bessa, R.J.; Matos, M.A.; Costa, I.C.; Bremermann, L.; Franchin, I.G.; Pestana, R.; Machado, N.; Waldl, H.; Wichmann, C.. "Reserve setting and steady-state security assessment using wind power uncertainty forecast: A case study". IEEE Transactions on Sustainable Energy 3 4 (2012): 827-836. http://www.scopus.com/inward/record.url?eid=2-s2.0-84883234089&partnerID=MN8TOARS.
    10.1109/tste.2012.2199340
  37. Matos, M.A.; Bessa, R.J.. "Setting the operating reserve using probabilistic wind power forecasts". IEEE Transactions on Power Systems 26 2 (2011): 594-603. http://www.scopus.com/inward/record.url?eid=2-s2.0-79955525885&partnerID=MN8TOARS.
    10.1109/tpwrs.2010.2065818
  38. Costa, P.M.; Matos, M.A.. "Capacity credit of microgeneration and microgrids". Energy Policy 38 10 (2010): 6330-6337. http://www.scopus.com/inward/record.url?eid=2-s2.0-77956415431&partnerID=MN8TOARS.
    10.1016/j.enpol.2010.06.024
  39. Faria, J.A.; Nunes, E.; Matos, M.A.. "Cost and quality of service analysis of production systems based on the cumulative downtime". International Journal of Production Research 48 6 (2010): 1653-1684. http://www.scopus.com/inward/record.url?eid=2-s2.0-74549142877&partnerID=MN8TOARS.
    10.1080/00207540802068631
  40. Costa, P.M.; Matos, M.A.. "Assessing the contribution of microgrids to the reliability of distribution networks". Electric Power Systems Research 79 2 (2009): 382-389. http://www.scopus.com/inward/record.url?eid=2-s2.0-57349197143&partnerID=MN8TOARS.
    10.1016/j.epsr.2008.07.009
  41. Khodr, H.M.; Salloum, G.A.; Saraiva, J.T.; Matos, M.A.. "Design of grounding systems in substations using a mixed-integer linear programming formulation". Electric Power Systems Research 79 1 (2009): 126-133. http://www.scopus.com/inward/record.url?eid=2-s2.0-54049157792&partnerID=MN8TOARS.
    10.1016/j.epsr.2008.05.008
  42. Costa, P.M.; Matos, M.A.. "Avoided losses on LV networks as a result of microgeneration". Electric Power Systems Research 79 4 (2009): 629-634. http://www.scopus.com/inward/record.url?eid=2-s2.0-59349111930&partnerID=MN8TOARS.
    10.1016/j.epsr.2008.09.014
  43. Matos, M.; Lopes, J.P.; Rosa, M.; Ferreira, R.; Leite da Silva, A.; Sales, W.; Resende, L.; et al. "Probabilistic evaluation of reserve requirements of generating systems with renewable power sources: The Portuguese and Spanish cases". International Journal of Electrical Power and Energy Systems 31 9 (2009): 562-569. http://www.scopus.com/inward/record.url?eid=2-s2.0-69649109337&partnerID=MN8TOARS.
    10.1016/j.ijepes.2009.03,031
  44. Gouveia, E.M.; Matos, M.A.. "Symmetric AC fuzzy power flow model". European Journal of Operational Research 197 3 (2009): 1012-1018. http://www.scopus.com/inward/record.url?eid=2-s2.0-61849148817&partnerID=MN8TOARS.
    10.1016/j.ejor.2007.12.044
  45. Gouveia, E.M.; Matos, M.A.. "Evaluating operational risk in a power system with a large amount of wind power". Electric Power Systems Research 79 5 (2009): 734-739. http://www.scopus.com/inward/record.url?eid=2-s2.0-60449115601&partnerID=MN8TOARS.
    10.1016/j.epsr.2008.10.006
  46. Khodr, H.M.; Martinez-Crespo, J.; Matos, M.A.; Pereira, J.. "Distribution systems reconfiguration based on OPF using benders decomposition". IEEE Transactions on Power Delivery 24 4 (2009): 2166-2176. http://www.scopus.com/inward/record.url?eid=2-s2.0-70350273054&partnerID=MN8TOARS.
    10.1109/tpwrd.2009.2027510
  47. Pereira, J.; Viana, A.; Lucus, B.G.; Matos, M.. "A meta-heuristic approach to the unit commitment problem under network constraints". International Journal of Energy Sector Management 2 3 (2008): 449-467. http://www.scopus.com/inward/record.url?eid=2-s2.0-53349171804&partnerID=MN8TOARS.
    10.1108/17506220810892973
  48. Matos, M.A.; Gouveia, E.M.. "The fuzzy power flow revisited". IEEE Transactions on Power Systems 23 1 (2008): 213-218. http://www.scopus.com/inward/record.url?eid=2-s2.0-39749202977&partnerID=MN8TOARS.
    10.1109/tpwrs.2007.913686
  49. Viana, A.; de Sousa, J.P.; Matos, M.A.. "Fast solutions for UC problems by a new metaheuristic approach". Electric Power Systems Research 78 8 (2008): 1385-1395. http://www.scopus.com/inward/record.url?eid=2-s2.0-42749096409&partnerID=MN8TOARS.
    10.1016/j.epsr.2008.01.002
  50. Costa, P.M.; Matos, M.A.; Peças Lopes, J.A.. "Regulation of microgeneration and microgrids". Energy Policy 36 10 (2008): 3893-3904. http://www.scopus.com/inward/record.url?eid=2-s2.0-51349128975&partnerID=MN8TOARS.
    10.1016/j.enpol.2008.07.013
  51. Brown, P.D.; Peças Lopes, J.A.; Matos, M.A.. "Optimization of pumped storage capacity in an isolated power system with large renewable penetration". IEEE Transactions on Power Systems 23 2 (2008): 523-531. http://www.scopus.com/inward/record.url?eid=2-s2.0-43849089097&partnerID=MN8TOARS.
    10.1109/TPWRS.2008.919419
  52. Hilber, P.; Miranda, V.; Matos, M.A.; Bertling, L.. "Multiobjective optimization applied to maintenance policy for electrical networks". IEEE Transactions on Power Systems 22 4 (2007): 1675-1682. http://www.scopus.com/inward/record.url?eid=2-s2.0-36348973029&partnerID=MN8TOARS.
    10.1109/tpwrs.2007.908468
  53. Leite Da Silva, A.M.; Manso, L.A.F.; Sales, W.S.; Resende, L.C.; Aguiar, M.J.Q.; Matos, M.A.; Lopes, J.A.P.; Miranda, V.. "Application of Monte Carlo simulation to generating system well-being analysis considering renewable sources". European Transactions on Electrical Power 17 4 (2007): 387-400. http://www.scopus.com/inward/record.url?eid=2-s2.0-34547683483&partnerID=MN8TOARS.
    10.1002/etep.157
  54. Matos, M.A.. "Decision under risk as a multicriteria problem". European Journal of Operational Research 181 3 (2007): 1516-1529. http://www.scopus.com/inward/record.url?eid=2-s2.0-33947657072&partnerID=MN8TOARS.
    10.1016/j.ejor.2005.11.057
  55. Faria, J.; Matos, M.; Nunes, E.. "Optimal design of work-in-process buffers". International Journal of Production Economics 99 1-2 (2006): 144-155. http://www.scopus.com/inward/record.url?eid=2-s2.0-27644484071&partnerID=MN8TOARS.
    10.1016/j.ijpe.2004.12.019
  56. Yu, W.; Sheblé, G.B.; Lopes, J.A.P.; Matos, M.A.. "Valuation of switchable tariff for wind energy". Electric Power Systems Research 76 5 (2006): 382-388. http://www.scopus.com/inward/record.url?eid=2-s2.0-31344441779&partnerID=MN8TOARS.
    10.1016/j.epsr.2005.09.004
  57. Yu, W.; Sheblé, G.B.; Matos, M.A.. "Application of markov chain models for short-term generation assets valuation". Probability in the Engineering and Informational Sciences 20 1 (2006): 127-141. http://www.scopus.com/inward/record.url?eid=2-s2.0-33644892565&partnerID=MN8TOARS.
    10.1017/s0269964806060086
  58. Costa, P.M.; Matos, M.A.. "Loss Allocation in Distribution Networks With Embedded Generation". IEEE Transactions on Power Systems 19 1 (2004): 384-389. http://www.scopus.com/inward/record.url?eid=2-s2.0-1442265471&partnerID=MN8TOARS.
    10.1109/tpwrs.2003.820698
  59. Matos, M.A.. "Formal requirements for utility and value functions for security-related decisions". COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 23 1 (2004): 225-236. http://www.scopus.com/inward/record.url?eid=2-s2.0-1442288677&partnerID=MN8TOARS.
    10.1108/03321640410507662
  60. Viana, A.; De Sousa, J.P.; Matos, M.. "Using GRASP to Solve the Unit Commitment Problem". Annals of Operations Research 120 1-4 (2003): 117-132. http://www.scopus.com/inward/record.url?eid=2-s2.0-0037272967&partnerID=MN8TOARS.
    10.1023/a:1023326413273
  61. Peças Lopes, J.A.; Matos, M.A.. "2001 PowerTech review". IEEE Power Engineering Review 21 12 (2001): 20-21. http://www.scopus.com/inward/record.url?eid=2-s2.0-0035688623&partnerID=MN8TOARS.
    10.1109/mper.2001.969348
  62. Faria, J.A.; Matos, M.A.. "An analytical methodology for the dependability evaluation of non-Markovian systems with multiple components". Reliability Engineering and System Safety 74 2 (2001): 193-210. http://www.scopus.com/inward/record.url?eid=2-s2.0-0035501404&partnerID=MN8TOARS.
    10.1016/s0951-8320(01)00073-4
  63. Dimitrovski, A.D.; Matos, M.A.. "Fuzzy engineering economic analysis". IEEE Transactions on Power Systems 15 1 (2000): 283-289. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034139029&partnerID=MN8TOARS.
    10.1109/59.852134
  64. Matos, M.A.; Hatziargyriou, N.D.; Peças Lopes, J.A.; Matos, M.; Hatziargyriou, N.; Pecas Lopes, J.. "Multicontingency steady state security evaluation using fuzzy clustering techniques". IEEE Transactions on Power Systems 15 1 (2000): 177-183. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034139062&partnerID=MN8TOARS.
    10.1109/59.852118
  65. Matos, M.A.; Miranda, V.; Proença, M.; Hang, P.S.; Pinto, J.L.; Contaxis, G.; Papadopoulos, M.; et al. "Economic operation of isolated networks with wind power". Wind Engineering 23 2 (1999): 89-105. http://www.scopus.com/inward/record.url?eid=2-s2.0-0033512983&partnerID=MN8TOARS.
  66. Matos, M.A.. "A fuzzy filtering method applied to power distribution planning". Fuzzy Sets and Systems 102 1 (1999): 53-58. http://www.scopus.com/inward/record.url?eid=2-s2.0-0039523320&partnerID=MN8TOARS.
    10.1016/s0165-0114(98)00202-4
  67. Hatziargyriou, N.; Contaxis, G.; Papadopoulos, M.; Papadias, B.; Peças Lopes, J.A.; Matos, M.; Kariniotakis, G.; et al. "The 'CARE' system overview: Advanced control advice for power systems with large-scale integration of renewable energy sources". Wind Engineering 23 2 (1999): 57-68. http://www.scopus.com/inward/record.url?eid=2-s2.0-0033498205&partnerID=MN8TOARS.
  68. Matos, M.A.; Ponce de Leão, M.T.. "Electric distribution systems planning with fuzzy loads". International Transactions in Operational Research 2 3 (1995): 287-296. http://www.scopus.com/inward/record.url?eid=2-s2.0-0040412151&partnerID=MN8TOARS.
    10.1016/0969-6016(95)00011-U

Other

Other output
  1. Consumer-centric electricity markets: A comprehensive review on user preferences and key performance indicators. 2022. Oliveira, C; Botelho, DF; Soares, T; Faria, AS; Dias, BH; Matos, MA; De Oliveira, LW.
    10.1016/j.epsr.2022.108088
  2. The future of power systems: Challenges, trends, and upcoming paradigms. 2019. Lopes, JAP; Madureira, AG; Matos, M; Bessa, RJ; Monteiro, V; Afonso, JL; Santos, SF; et al.
    10.1002/wene.368
Activities

Supervision

Thesis Title
Role 		Degree Subject (Type)
Institution / Organization
2019/07/29 - 2022/07/14 Application of Multi-Criteria Decision-Aid (MCDA) in Decision Making: Mineral Resource Projects Investment Evaluation
Co-supervisor
Universidade do Porto Faculdade de Engenharia, Portugal
2015 - 2019/07/15 Optimal Participation of an Aggregator of Prosumers in the Electricity Markets
Supervisor of José Pedro Barreira Iria
Universidade do Porto Faculdade de Engenharia, Portugal
2013/09/13 - 2018/11/05 Integrated Energy Solutions Towards Sustainable Isolated Communities
Supervisor of Golnar Hejazi
Universidade do Porto Faculdade de Engenharia, Portugal
2011/09/09 - 2016/01/06 Provision of Advanced Ancillary Services through Demand Side Integration
Supervisor of Miguel Luis Delgado Heleno
Universidade do Porto Faculdade de Engenharia, Portugal
2009/09/04 - 2014/07/21 Impact evaluation of the large scale integration of electric vehicles in the security of suply
Supervisor of Leonardo Elizeire Bremermann
Universidade do Porto Faculdade de Engenharia, Portugal
2011/12/28 - 2013/07/25 Methodologies for the participation of an electric vehicles' aggregator in the electricity markets
Supervisor of Ricardo Jorge Gomes de Sousa Bento Bessa
Universidade do Porto Faculdade de Engenharia, Portugal
2009/05/06 - 2013/03/18 Energy Planning with Electricity Storage and Sustainable Mobility: The Study of an Isolated System
Co-supervisor of Antero Miguel Lopes Moreira da Silva
Universidade do Porto Faculdade de Engenharia, Portugal
2007/09/20 - 2012/04/20 Evaluation of Technical, Economic and Environmental Impacts Resulting From Large Scale Integration of Microgrids
Co-supervisor of Julija Vasiljevska
Universidade do Porto Faculdade de Engenharia, Portugal
2003/06/04 - 2009/07/17 Avaliação da Adequação da Rede de Transporte de Energia Eléctrica em Ambiente Liberalizado
Supervisor of Eduardo Miguel Teixeira Mendonça Gouveia
Universidade do Porto Faculdade de Engenharia, Portugal
2003/05/07 - 2009/05/18 Regulação da integração de microgeração e microredes em sistemas de distribuição de energia eléctrica
Supervisor of Paulo Moisés Almeida da Costa
Universidade do Porto Faculdade de Engenharia, Portugal
2000/02/02 - 2005/09/28 Fiabilidade de Sistemas com Processos de Falha e Recuperação Não-Markovianos e com Parâmetros Incertos
Supervisor of Eusébio Manuel Pinto Nunes
Universidade do Porto Faculdade de Engenharia, Portugal
2000/07/05 - 2004/12/10 Metaheuristics for the Unit Commitment Problem. The Constraint Oriented Neighbourhoods Search Strategy
Co-supervisor of Ana Maria Marques de Moura Gomes Viana
Universidade do Porto Faculdade de Engenharia, Portugal
1993/09/22 - 2001/10/08 Predição da Qualidade na Indústria de Fundição Injectada
Supervisor of João Francisco de Sousa Cardoso
Universidade do Porto Faculdade de Engenharia, Portugal
1989/09/04 - 1996/02/16 Planeamento de Redes de Distribuição com Produção Independente
Supervisor of Maria Teresa Costa Pereira da Silva Ponce de Leão
Universidade do Porto Faculdade de Engenharia, Portugal