IoE-Based Control and Monitoring of Electrical Grids: A Smart Grid’s Perspective Nelson Pinto, Dario Cruz, Jânio Monteiro, Cristiano Cabrita, Jorge Semião, et al. Research Anthology on Smart Grid and Microgrid Development, 2022 In many countries, renewable energy production already represents an important percentage of the total energy that is generated in electrical grids. In order to reach higher levels of integration, demand side management measures are yet required. In fact, different from the legacy electrical grids, where at any given instant the generation levels are adjusted to meet the demand, when using renewable energy sources, the demand must be adapted in accordance with the generation levels, since these cannot be controlled. In order to alleviate users from the burden of individual control of each appliance, energy management systems (EMSs) have to be developed to both monitor the generation and consumption patterns and to control electrical appliances. In this context, the main contribution of this chapter is to present the implementation of such an IoT-based monitoring and control system for microgrids, capable of supporting the development of an EMS.
Monitoring, Predicting, and Optimizing Energy Consumptions: A Goal Toward Global Sustainability Pedro J. S. Cardoso, Jânio Monteiro, Cristiano Cabrita, Jorge Semião, Dario Medina Cruz, et al. Research Anthology on Smart Grid and Microgrid Development, 2022 Energy consumption and, consequently, the associated costs (e.g., environmental and monetary) concern most individuals, companies, and institutions. Platforms for the monitoring, predicting, and optimizing energy consumption are an important asset that can contribute to the awareness about the ongoing usage levels, but also to an effective reduction of these levels. A solution is to leave the decisions to smart system, supported for instance in machine learning and optimization algorithms. This chapter involves those aspects and the related fields with emphasis in the prediction of energy consumption to optimize its usage policies.
Monitoring, Predicting, and Optimizing Energy Consumptions: A Goal Toward Global Sustainability Pedro J. S. Cardoso, Jânio Monteiro, Cristiano Cabrita, Jorge Semião, Dario Medina Cruz, et al. Research Anthology on Clean Energy Management and Solutions, 2021 Energy consumption and, consequently, the associated costs (e.g., environmental and monetary) concern most individuals, companies, and institutions. Platforms for the monitoring, predicting, and optimizing energy consumption are an important asset that can contribute to the awareness about the ongoing usage levels, but also to an effective reduction of these levels. A solution is to leave the decisions to smart system, supported for instance in machine learning and optimization algorithms. This chapter involves those aspects and the related fields with emphasis in the prediction of energy consumption to optimize its usage policies.
Comparing Power Transformer Turn-to-Turn Faults Protection Methods: Negative Sequence Component Versus Space-Vector Algorithms Luis M. R. Oliveira, Antonio J. Marques Cardoso IEEE Transactions on Industry Applications, 2017 This paper presents a comparison of two of the most sensitive methods to detect low-level turn-to-turn faults in the windings of three-phase transformers. The performance of the negative sequence component and of the space vector protection algorithms is tested under several internal and/or external fault conditions. The simulation results indicate that the fault detection sensitivity of both methods is very similar.
Comparing power transformer turn-to-turn faults protection methods: Negative sequence component versus space vector algorithms Luis M. R. Oliveira, A.J. Marques Cardoso Proceedings Sdemped 2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines Power Electronics and Drives, 2015 This paper presents a comparison of two of the most sensitive methods to detect low-level turn-to-turn faults in the windings of three-phase transformers. The performance of the negative sequence component and of the space-vector protection algorithms is tested under several internal and/or external fault conditions. The results indicate that the space-vector approach is slightly more sensitive for detecting low-level turn-to-turn winding faults. For more severe defects, the fault detection sensitivity of both methods is similar.
Iterative frequency-domain equalization for general QAM constellations with reduced envelope fluctuations through magnitude modulation techniques Marco Gomes, Rui Dinis, Vitor Silva, Francisco Cercas, Luis Oliveira IEEE Vehicular Technology Conference, 2015 The development of new mobile communications systems faces several important challenges, namely demanding for high bit rates, high spectral efficiency, low energy consumption and the usage of hostile channels. In order to fulfill these requirements for block-based single carrier transmissions, we propose to use high order QAM constellations combined with envelope control Magnitude Modulation (MM) techniques and bit-interleaved coded modulation with LDPC codes. Also, the receiver uses powerful MM specialized IB-DFE solutions to combat the channel distortion and noise. The obtained results have shown significant improvements in terms of energy efficiency and bit error rate.
Leakage inductances calculation for power transformers interturn fault studies Luis M. R. Oliveira, A. J. Marques Cardoso IEEE Transactions on Power Delivery, 2015 This paper presents a general approach to compute the leakage inductances of power transformers with turn-to-turn winding faults. The leakage inductances are obtained by using well-known conventional formulas, adapted to the asymmetrical conditions produced by the interturn fault in the leakage flux distribution. Two methods for calculating the leakage inductances are presented: the first requires detailed information about the geometry of the windings whereas the second uses simplifying assumptions, allowing to express the leakage inductances as a function of the nameplate short-circuit inductance, the number of turns, and core dimensions. A leakage inductance model of the transformer with faulty turns is also proposed, which is based on the three-winding transformer theory. This leakage inductance equivalent circuit can be easily integrated into other electromagnetic transient simulators. The results obtained from the application of the analytical methods and the equivalent circuit are validated using data obtained from finite-element analysis and experimental short-circuit tests.
Tratamiento de Medidas Altamente Ruidosas para su Empleo en un Sistema de Control. Filtros de Kalman J del Pino, J Ríos, JB Sánchez, JME Gómez, DR Castilla, JMA Márquez, ... Actas de las V Jornadas ScienCity 2022: Fomento de la Cultura Científica … , 2023 2023
IoE-Based Control and Monitoring of Electrical Grids: A Smart Grid's Perspective N Pinto, D Cruz, J Monteiro, C Cabrita, J Semião, PJS Cardoso, ... Research Anthology on Smart Grid and Microgrid Development, 843-868 , 2022 2022 Citations: 1
Monitoring, Predicting, and optimizing energy consumptions: a goal toward global sustainability PJS Cardoso, J Monteiro, C Cabrita, J Semião, DM Cruz, N Pinto, ... Research Anthology on Clean Energy Management and Solutions, 20-47 , 2021 2021 Citations: 8
Influência da substituição da cal por resíduos de cerâmica vermelha nas propriedades do estado endurecido de argamassas mistas L Oliveira, A Fontenele, A Cabral ENCONTRO NACIONAL DE TECNOLOGIA DO AMBIENTE CONSTRUÍDO 18 (1), 1-8 , 2020 2020 Citations: 1
IoE-Based Control and Monitoring of Electrical Grids: A Smart Grid's Perspective N Pinto, D Cruz, J Monteiro, C Cabrita, J Semião, PJS Cardoso, ... Harnessing the Internet of Everything (IoE) for Accelerated Innovation … , 2019 2019 Citations: 1
Development of an Energy Management System for the Charge Scheduling of Plug-in Electric Vehicles D Cruz, N Pinto, J Monteiro, PJS Cardoso, C Cabrita, J Semião, ... International Conference on Universal Access in Human-Computer Interaction … , 2018 2018 Citations: 1
Comparing power transformer turn-to-turn faults protection methods: negative sequence component versus space-vector algorithms LMR Oliveira, AJM Cardoso IEEE Transactions on Industry Applications 53 (3), 2817-2825 , 2016 2016 Citations: 65
Modeling and Characterization of Leakage Inductances LMR Oliveira, AJM Cardoso Technological Innovation for the Internet of Things: 4th IFIP WG 5.5 … , 2013 2013
Modeling and characterization of leakage inductances for transformer winding fault studies LMR Oliveira, AJM Cardoso Doctoral Conference on Computing, Electrical and Industrial Systems, 423-430 , 2013 2013 Citations: 7
Anesthetic approach for a clinical case of intravenous leiomyomatosis: case report L Oliveira, S Ramos Revista Brasileira de Anestesiologia 63, 504-507 , 2013 2013 Citations: 4
Desenvolvimento de métodos de deteção de avarias e algoritmos de proteção para aplicação em sistemas de monitorização contínua de transformadores trifásicos LMR Oliveira Coimbra:[sn] , 2013 2013 Citations: 11
Extended Park's vector approach-based differential protection of three-phase power transformers LMR Oliveira, AJM Cardoso IET electric power applications 6 (8), 463-472 , 2012 2012 Citations: 56
Power Transformers’ Fault Diagnostics by Park’s Vector Approach AJM Cardoso, LMR Oliveira Chapter in Transformers: Analysis, Design and Measurement, Xose M. López … , 2012 2012 Citations: 4
Power transformers differential protection using the pq power theory LMR Oliveira, AJM Cardoso Doctoral Conference on Computing, Electrical and Industrial Systems, 283-290 , 2012 2012 Citations: 2
Application of Park's power components to the differential protection of three-phase transformers LMR Oliveira, AJM Cardoso Electric power systems research 83 (1), 203-211 , 2012 2012 Citations: 19
Power transformers winding fault diagnosis by the on-load exciting current Extended Park's Vector Approach LMR Oliveira, AJM Cardoso, SMA Cruz Electric Power Systems Research 81 (6), 1206-1214 , 2011 2011 Citations: 47
Correction to “A Permeance-Based Transformer Model and Its Application to Winding Interturn Arcing Fault Studies LMR Oliveira, AJM Cardoso IEEE Transactions on Power Delivery 26 (1), 486-486 , 2011 2011 Citations: 1
Power transformers behavior under the occurrence of inrush currents and turn-to-turn winding insulation faults LMR Oliveira, AJM Cardoso The XIX International Conference on Electrical Machines-ICEM 2010, 1-7 , 2010 2010 Citations: 20
A permeance-based transformer model and its application to winding interturn arcing fault studies LMR Oliveira, AJM Cardoso IEEE transactions on power delivery 25 (3), 1589-1598 , 2010 2010 Citations: 96
An EPVA-based strategy for power transformers differential protection LMR Oliveira, AJM Cardoso Proc. Advanced Research Workshop on Modern Transformers , 2010 2010 Citations: 3
MOST CITED SCHOLAR PUBLICATIONS
A permeance-based transformer model and its application to winding interturn arcing fault studies LMR Oliveira, AJM Cardoso IEEE transactions on power delivery 25 (3), 1589-1598 , 2010 2010 Citations: 96
Comparing power transformer turn-to-turn faults protection methods: negative sequence component versus space-vector algorithms LMR Oliveira, AJM Cardoso IEEE Transactions on Industry Applications 53 (3), 2817-2825 , 2016 2016 Citations: 65
Extended Park's vector approach-based differential protection of three-phase power transformers LMR Oliveira, AJM Cardoso IET electric power applications 6 (8), 463-472 , 2012 2012 Citations: 56
Condition monitoring and diagnostics of power transformers AJ Cardoso, LMR Oliveira 1999 Citations: 51
Power transformers winding fault diagnosis by the on-load exciting current Extended Park's Vector Approach LMR Oliveira, AJM Cardoso, SMA Cruz Electric Power Systems Research 81 (6), 1206-1214 , 2011 2011 Citations: 47
Power transformers behavior under the occurrence of inrush currents and turn-to-turn winding insulation faults LMR Oliveira, AJM Cardoso The XIX International Conference on Electrical Machines-ICEM 2010, 1-7 , 2010 2010 Citations: 20
Transformers on-load exciting current Parks vector approach as a tool for winding faults diagnostics LMR Oliveira, AJ Cardoso, SMA Cruz Brugge , 2002 2002 Citations: 20
Application of Park's power components to the differential protection of three-phase transformers LMR Oliveira, AJM Cardoso Electric power systems research 83 (1), 203-211 , 2012 2012 Citations: 19
Intermittent turn-to-turn winding faults diagnosis in power transformers by the on-load exciting current Park's Vector Approach LMR Oliveira, AJM Cardoso 2008 18th International Conference on Electrical Machines, 1-6 , 2008 2008 Citations: 18
Modelling and simulation of three-phase power transformers LMR Oliveira, AJ Cardoso Lisbon , 1999 1999 Citations: 17
On-line diagnostics of transformer winding insulation failures, by Parks vector approach LMR Oliveira, AJ Cardoso Berlin , 2002 2002 Citations: 16
Three-phase, three-limb, steady-state transformer model: the case of a ynzn connection LMR Oliveira, AJM Cardoso Proceedings of the IASTED International Conference" Power and Energy Systems … , 2000 2000 Citations: 16
A coupled electromagnetic transformer model for the analysis of winding inter-turn short-circuits LMR Oliveira, AJ Cardoso Grado , 2001 2001 Citations: 13
Desenvolvimento de métodos de deteção de avarias e algoritmos de proteção para aplicação em sistemas de monitorização contínua de transformadores trifásicos LMR Oliveira Coimbra:[sn] , 2013 2013 Citations: 11
Monitoring, Predicting, and optimizing energy consumptions: a goal toward global sustainability PJS Cardoso, J Monteiro, C Cabrita, J Semião, DM Cruz, N Pinto, ... Research Anthology on Clean Energy Management and Solutions, 20-47 , 2021 2021 Citations: 8
Modeling and characterization of leakage inductances for transformer winding fault studies LMR Oliveira, AJM Cardoso Doctoral Conference on Computing, Electrical and Industrial Systems, 423-430 , 2013 2013 Citations: 7
Diagnóstico de avarias em transformadores trifásicos AJM Cardoso, LMR Oliveira, NS Gameiro, P Veloso Anais da Engenharia e Tecnologia Electrotécnica 6, 9-12 , 1998 1998 Citations: 6
Incipient turn-to-turn winding fault diagnosis of power transformers by the on-load exciting current Extended Park's Vector Approach LMR Oliveira, AJM Cardoso Proc. Advanced Research Workshop on Modern Transformers (ARWtr04), 134-139 , 2004 2004 Citations: 5
Anesthetic approach for a clinical case of intravenous leiomyomatosis: case report L Oliveira, S Ramos Revista Brasileira de Anestesiologia 63, 504-507 , 2013 2013 Citations: 4
Power Transformers’ Fault Diagnostics by Park’s Vector Approach AJM Cardoso, LMR Oliveira Chapter in Transformers: Analysis, Design and Measurement, Xose M. López … , 2012 2012 Citations: 4
