This page has only limited features, please log in for full access.
The FlexPlan Horizon2020 project aims at establishing a new grid-planning methodology which considers the opportunity to introduce new storage and flexibility resources in electricity transmission and distribution grids as an alternative to building new grid elements, in accordance with the intentions of the Clean Energy for all Europeans regulatory package of the European Commission. FlexPlan creates a new innovative grid-planning tool whose ambition is to go beyond the state of the art of planning methodologies by including the following innovative features: assessment of the best planning strategy by analysing in one shot a high number of candidate expansion options provided by a pre-processor tool, simultaneous mid- and long-term planning assessment over three grid years (2030, 2040, 2050), incorporation of a full range of cost–benefit analysis criteria into the target function, integrated transmission distribution planning, embedded environmental analysis (air quality, carbon footprint, landscape constraints), probabilistic contingency methodologies in replacement of the traditional N-1 criterion, application of numerical decomposition techniques to reduce calculation efforts and analysis of variability of yearly renewable energy sources (RES) and load time series through a Monte Carlo process. Six regional cases covering nearly the whole European continent are developed in order to cast a view on grid planning in Europe till 2050. FlexPlan will end up formulating guidelines for regulators and planning offices of system operators by indicating to what extent system flexibility can contribute to reducing overall system costs (operational + investment) yet maintaining current system security levels and which regulatory provisions could foster such process. This paper provides a complete description of the modelling features of the planning tool and pre-processor and provides the first results of their application in small-scale scenarios.
Gianluigi Migliavacca; Marco Rossi; Dario Siface; Matteo Marzoli; Hakan Ergun; Raúl Rodríguez-Sánchez; Maxime Hanot; Guillaume Leclerq; Nuno Amaro; Aleksandr Egorov; Jawana Gabrielski; Björn Matthes; Andrei Morch. The Innovative FlexPlan Grid-Planning Methodology: How Storage and Flexible Resources Could Help in De-Bottlenecking the European System. Energies 2021, 14, 1194 .
AMA StyleGianluigi Migliavacca, Marco Rossi, Dario Siface, Matteo Marzoli, Hakan Ergun, Raúl Rodríguez-Sánchez, Maxime Hanot, Guillaume Leclerq, Nuno Amaro, Aleksandr Egorov, Jawana Gabrielski, Björn Matthes, Andrei Morch. The Innovative FlexPlan Grid-Planning Methodology: How Storage and Flexible Resources Could Help in De-Bottlenecking the European System. Energies. 2021; 14 (4):1194.
Chicago/Turabian StyleGianluigi Migliavacca; Marco Rossi; Dario Siface; Matteo Marzoli; Hakan Ergun; Raúl Rodríguez-Sánchez; Maxime Hanot; Guillaume Leclerq; Nuno Amaro; Aleksandr Egorov; Jawana Gabrielski; Björn Matthes; Andrei Morch. 2021. "The Innovative FlexPlan Grid-Planning Methodology: How Storage and Flexible Resources Could Help in De-Bottlenecking the European System." Energies 14, no. 4: 1194.
The increasing integration of renewables and the advent of smart grids in most countries is leading to a growing number of generation nodes in power systems - distributed generation. System operators must cope with this change and from a network planning perspective, this increase of generation units presents technical challenges. One of these challenges is related to the need that system operators have to be able to know the RES integration capacity at node level, here defined as nodal capacity both in normal and under contingency conditions. This paper presents a tool that calculates the security constraint nodal capacity value of a set of nodes in a power system. Due to the non-convex nature of this problem the tool uses combinatorial optimization methods to be able to assess the nodal capacity values. Results obtained by applying it to the IEEE-300 bus test system are presented.
Nuno Amaro; Francisco Reis. Evolutionary capacity allocation tool to safe grid integration of renewable energy sources. 2018 International Conference on Smart Energy Systems and Technologies (SEST) 2018, 1 -6.
AMA StyleNuno Amaro, Francisco Reis. Evolutionary capacity allocation tool to safe grid integration of renewable energy sources. 2018 International Conference on Smart Energy Systems and Technologies (SEST). 2018; ():1-6.
Chicago/Turabian StyleNuno Amaro; Francisco Reis. 2018. "Evolutionary capacity allocation tool to safe grid integration of renewable energy sources." 2018 International Conference on Smart Energy Systems and Technologies (SEST) , no. : 1-6.
This paper presents a methodology to assess the wave energy potential and the impact of inter-annual variability of the resource in overall energy production. This methodology was developed in the scope of a running H2020 project named Big-DataOcean, which aims to create a data repository and service marketplace for the maritime sector. The methodology is applied considering data from two different locations in the Portuguese coast for the years of2016 and 2017. Additionally, two wave energy converters are also used to verify the impact of inter-annual variability in the energy production through well-established KPI's.
Nuno Amaro; Rui Amaral Lopes; Joao Murta Pina; Carlos Agostinho; Francisco Abreu; David Torrado. A Methodology for Assessing the Impact of the Interannual Variability of Wave Energy Resource on Electrical Energy Conversion. 2018 International Conference on Smart Energy Systems and Technologies (SEST) 2018, 1 -6.
AMA StyleNuno Amaro, Rui Amaral Lopes, Joao Murta Pina, Carlos Agostinho, Francisco Abreu, David Torrado. A Methodology for Assessing the Impact of the Interannual Variability of Wave Energy Resource on Electrical Energy Conversion. 2018 International Conference on Smart Energy Systems and Technologies (SEST). 2018; ():1-6.
Chicago/Turabian StyleNuno Amaro; Rui Amaral Lopes; Joao Murta Pina; Carlos Agostinho; Francisco Abreu; David Torrado. 2018. "A Methodology for Assessing the Impact of the Interannual Variability of Wave Energy Resource on Electrical Energy Conversion." 2018 International Conference on Smart Energy Systems and Technologies (SEST) , no. : 1-6.
Power systems have been through different challenges and technological innovations in the last years and are rapidly evolving into digital systems through the deployment of the smart grids concept. Producing large amounts of data, power systems can benefit from the application of big data analytics which can help leveraging the optimization processes going on in power grids nowadays. The whole value of chain of electric power can benefit from the application of big data techniques. This paper presents a short overview of possible applications and challenges that still need to be considered for this synergy to grow. Under the framework of an H2020 funded project named BigDataOcean, a case study will be described, showing how a data-driven approach can foster the development of offshore renewable sources using the example of wave energy.
Nuno Amaro; João Murta Pina. Big data in power systems leveraging grid optimization and wave energy integration. 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC) 2017, 1046 -1054.
AMA StyleNuno Amaro, João Murta Pina. Big data in power systems leveraging grid optimization and wave energy integration. 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC). 2017; ():1046-1054.
Chicago/Turabian StyleNuno Amaro; João Murta Pina. 2017. "Big data in power systems leveraging grid optimization and wave energy integration." 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC) , no. : 1046-1054.
Over the last years, most countries in the world are facing a growing integration of renewable energy sources in their power networks due to the continuous effort on decreasing their carbon footprint. This increasing penetration of renewable energy sources led to the emergence and consequent grow of distributed generation units. From a network planning and growth perspective, the increase of producing centers has different challenges. Additionally, system operators must know and sometimes publish the grid capacity to receive new generation units. Taking this into account, this paper presents a tool that can be used to determine the capacity for reception of new energy sources in the different grid nodes. The tool uses genetic algorithms and power systems analysis software to perform this nodal capacity allocation and its validation is presented through the application of a case study.
Nuno Amaro; F.S. Reis. Grid-driven tool for renewables integration based on nodal capacity allocation. 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC) 2017, 845 -851.
AMA StyleNuno Amaro, F.S. Reis. Grid-driven tool for renewables integration based on nodal capacity allocation. 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC). 2017; ():845-851.
Chicago/Turabian StyleNuno Amaro; F.S. Reis. 2017. "Grid-driven tool for renewables integration based on nodal capacity allocation." 2017 International Conference on Engineering, Technology and Innovation (ICE/ITMC) , no. : 845-851.
Studies of ac losses in superconducting materials, particularly in pancake coils, are of great importance for a better understanding of the superconductivity phenomena and its applications in power systems. Due to different technical difficulties, these studies are usually performed considering one of two approaches: considering superconducting coils of few turns and studying ac losses in a large frequency range versus superconducting coils with a large number of turns but measuring ac losses only in low frequencies. In this paper, ac losses are simulated and verified experimentally in a 128 turn Bi-2223 coil in a range of frequencies from 72 Hz till 1152 Hz. Obtained results show a frequency-dependent behavior. Experimental results are compared to those obtained from two different numerical modeling methods: one using commercial software based on finite-element methods and another using a variational method approach. All obtained results agree, validating the simulations and serving as basis for simulations with larger high temperature superconducting coils.
Nuno Amaro; Jan Souc; Enric Pardo; Joao Murta-Pina; Joao Martins; Jose-Maria Ceballos; Fedor Gomory. AC losses in Bi-2223 Single-Pancake Coils From 72 to 1152 Hz—Modeling and Measurements. IEEE Transactions on Applied Superconductivity 2016, 26, 1 -7.
AMA StyleNuno Amaro, Jan Souc, Enric Pardo, Joao Murta-Pina, Joao Martins, Jose-Maria Ceballos, Fedor Gomory. AC losses in Bi-2223 Single-Pancake Coils From 72 to 1152 Hz—Modeling and Measurements. IEEE Transactions on Applied Superconductivity. 2016; 26 (8):1-7.
Chicago/Turabian StyleNuno Amaro; Jan Souc; Enric Pardo; Joao Murta-Pina; Joao Martins; Jose-Maria Ceballos; Fedor Gomory. 2016. "AC losses in Bi-2223 Single-Pancake Coils From 72 to 1152 Hz—Modeling and Measurements." IEEE Transactions on Applied Superconductivity 26, no. 8: 1-7.
Superconducting Magnetic Energy Storage (SMES) systems are one of the superconducting technologies with envisaged applications in power systems. The flexibility of these systems allows a utilization as Energy Storage Systems (ESS) but also as power devices, for power quality applications. In the actual context of electric grids, with the emergence of the paradigm of Smart Grids, the possible applications of SMES systems are discussed, considering the actual state of the art in superconducting materials. Main envisaged applications are presented and a short comparison with other ESS is also performed, as a way to integrate SMES systems into the actual and upcoming context of power systems. Main already running or finished projects using not only standalone SMES systems but also a combination of multiple superconducting devices are also presented. Finally, a short description of concept projects using SMES systems is also given.
Nuno Amaro; Joao Murta Pina; Joao Martins; Jose Maria Ceballos. Integration of SMES devices in power systems - opportunities and challenges. 2015 9th International Conference on Compatibility and Power Electronics (CPE) 2015, 482 -487.
AMA StyleNuno Amaro, Joao Murta Pina, Joao Martins, Jose Maria Ceballos. Integration of SMES devices in power systems - opportunities and challenges. 2015 9th International Conference on Compatibility and Power Electronics (CPE). 2015; ():482-487.
Chicago/Turabian StyleNuno Amaro; Joao Murta Pina; Joao Martins; Jose Maria Ceballos. 2015. "Integration of SMES devices in power systems - opportunities and challenges." 2015 9th International Conference on Compatibility and Power Electronics (CPE) , no. : 482-487.
Power quality is a fundamental concern in modern power grids. Since there is a very broad spectrum of causes for power quality depreciation, it is important to continuously develop devices that can overcome power quality problems in electric grids, thus increasing the quality of energy. Active power filters are one of the main class of devices whose applications are related to power quality improvement. In this paper, a combination of a Unified Power Quality Conditioner and a Superconducting Magnetic Energy Storage system is considered and simulation results indicate that such hybrid system can be used to overcome power quality issues like harmonic distortion, voltage sags/swells and phase unbalance. The advantages of such combination are also discussed and results indicate that the addition of the superconducting device can increase the range of applications of the power active filter.
Nuno Amaro; Joao Murta Pina; Joao Martins; Jose Maria Ceballos. Improved Operation of an UPQC by addition of a Superconducting Magnetic Energy Storage system. 2015 9th International Conference on Compatibility and Power Electronics (CPE) 2015, 82 -86.
AMA StyleNuno Amaro, Joao Murta Pina, Joao Martins, Jose Maria Ceballos. Improved Operation of an UPQC by addition of a Superconducting Magnetic Energy Storage system. 2015 9th International Conference on Compatibility and Power Electronics (CPE). 2015; ():82-86.
Chicago/Turabian StyleNuno Amaro; Joao Murta Pina; Joao Martins; Jose Maria Ceballos. 2015. "Improved Operation of an UPQC by addition of a Superconducting Magnetic Energy Storage system." 2015 9th International Conference on Compatibility and Power Electronics (CPE) , no. : 82-86.
Superconducting Magnetic Energy Storage (SMES) is a class of promising superconducting devices, considering its possible applications in power systems. This paper describes a combination of a SMES with a Unified Power Quality Conditioner (UPQC) for power quality improvement in an electric grid. The SMES device is used to improve the UPQC performance by increasing the stored energy in the DC link. Several power quality faults including voltage sags and current harmonics are simulated and the system behavior is demonstrated. This hybrid system has the advantage of being able to overcome different kinds of power quality faults with higher performance than as a set of individual systems, thus increasing power quality in electric grids.
Nuno Amaro; Luís Casimiro; João Murta Pina; Joao Martins; José M. Ceballos. Combined Operation of an Unified Power Quality Conditioner and a Superconducting Magnetic Energy Storage System for Power Quality Improvement. Lecture Notes in Control and Information Sciences 2015, 450, 374 -382.
AMA StyleNuno Amaro, Luís Casimiro, João Murta Pina, Joao Martins, José M. Ceballos. Combined Operation of an Unified Power Quality Conditioner and a Superconducting Magnetic Energy Storage System for Power Quality Improvement. Lecture Notes in Control and Information Sciences. 2015; 450 ():374-382.
Chicago/Turabian StyleNuno Amaro; Luís Casimiro; João Murta Pina; Joao Martins; José M. Ceballos. 2015. "Combined Operation of an Unified Power Quality Conditioner and a Superconducting Magnetic Energy Storage System for Power Quality Improvement." Lecture Notes in Control and Information Sciences 450, no. : 374-382.
The standard electrical engineering applications of high-temperature superconductors (HTSs) as coils (SMESs), motors, power cables, fault current limiters (SFCLs), etc., usually involve operating conditions under which the critical current of HTS tapes might be degraded. The dependence of such magnitude on mechanical properties, frequency variations, or thermal changes is a key concern for the accurate design of those devices. Two of the parameters affecting the critical current when the superconductor operates in broad temperature ranges are the number and the speed of transitions from the superconducting to the normal state. In order to determine how these parameters affect the critical current, we have designed an automated dipping setup in liquid nitrogen to reproduce heating and cooling cycles on superconducting tapes. In this paper, this device is described, and several tests on a short sample of YBCO coated conductor are reported and analyzed.
Jose Maria Ceballos; Alfredo Álvarez-García; Pilar Suárez-Marcelo; Nuno Amaro; Belen Perez. Device for Measuring the Thermal Cycling Degradation in 2G Tapes for Electrical Power Applications. IEEE Transactions on Applied Superconductivity 2014, 25, 1 -3.
AMA StyleJose Maria Ceballos, Alfredo Álvarez-García, Pilar Suárez-Marcelo, Nuno Amaro, Belen Perez. Device for Measuring the Thermal Cycling Degradation in 2G Tapes for Electrical Power Applications. IEEE Transactions on Applied Superconductivity. 2014; 25 (3):1-3.
Chicago/Turabian StyleJose Maria Ceballos; Alfredo Álvarez-García; Pilar Suárez-Marcelo; Nuno Amaro; Belen Perez. 2014. "Device for Measuring the Thermal Cycling Degradation in 2G Tapes for Electrical Power Applications." IEEE Transactions on Applied Superconductivity 25, no. 3: 1-3.
Measurements of ac losses in high-temperature superconducting (HTS) coils are of utmost importance for power applications because these are one of the most limiting factors in superconducting devices. There are two possible ways to measure such losses: calorimetric and electromagnetic methods. An electromagnetic method using a contactless loop is reported in this paper. To verify the applicability of such method in medium- to large-sized coils, two different contactless loops were designed and built, and results are compared with those obtained from measurements made with different configurations of voltage taps. All tests were performed at 77 K, using a superconducting coil with a variable number of turns (up to a maximum of 128) wound from BSCCO tape. Currents ranging from zero to the critical value were applied, at frequencies from 72 to 1152 Hz.
Nuno Amaro; Jan Souc; Joao Murta Pina; Joao Martins; Jose Maria Ceballos; Fedor Gomory. Contactless Loop Method for Measurement of AC Losses in HTS Coils. IEEE Transactions on Applied Superconductivity 2014, 25, 1 -4.
AMA StyleNuno Amaro, Jan Souc, Joao Murta Pina, Joao Martins, Jose Maria Ceballos, Fedor Gomory. Contactless Loop Method for Measurement of AC Losses in HTS Coils. IEEE Transactions on Applied Superconductivity. 2014; 25 (3):1-4.
Chicago/Turabian StyleNuno Amaro; Jan Souc; Joao Murta Pina; Joao Martins; Jose Maria Ceballos; Fedor Gomory. 2014. "Contactless Loop Method for Measurement of AC Losses in HTS Coils." IEEE Transactions on Applied Superconductivity 25, no. 3: 1-4.
Sand pile and Bean models have already been applied to describe single grain HTS bulks. An extension to that approach was used to model multiseed bulks, needed for several practical applications as electric motors or flywheels with superconducting bearings. The use of genetic algorithms was then proposed to determine intra- and intergrain current densities, and application to two and three seeds samples using trapped flux experimental measurements was exemplified. However, this model assumed some simplifications, as equal properties in grain boundaries between neighboring grains. In this paper an extension to this methodology is proposed and evaluated by analyzing measurements performed in plans at different distances from surfaces of samples with three seeds. Discussion of its influence on a practical application is also explored.
João Murta-Pina; Pedro Pereira; José Maria Ceballos; Alfredo Álvarez; Nuno Amaro; Anabela Pronto; Jorge Silva; Pedro Arsénio. Validation and Application of Sand Pile Modeling of Multiseeded HTS Bulk Superconductors. IEEE Transactions on Applied Superconductivity 2014, 25, 1 -5.
AMA StyleJoão Murta-Pina, Pedro Pereira, José Maria Ceballos, Alfredo Álvarez, Nuno Amaro, Anabela Pronto, Jorge Silva, Pedro Arsénio. Validation and Application of Sand Pile Modeling of Multiseeded HTS Bulk Superconductors. IEEE Transactions on Applied Superconductivity. 2014; 25 (3):1-5.
Chicago/Turabian StyleJoão Murta-Pina; Pedro Pereira; José Maria Ceballos; Alfredo Álvarez; Nuno Amaro; Anabela Pronto; Jorge Silva; Pedro Arsénio. 2014. "Validation and Application of Sand Pile Modeling of Multiseeded HTS Bulk Superconductors." IEEE Transactions on Applied Superconductivity 25, no. 3: 1-5.
Superconducting Magnetic Energy Storage (SMES) systems are one potential application of superconductivity in electric grids. The main element of such systems is a coil, made from superconducting tape. Although SMES systems work in DC conditions, due to highly dynamic working regimes required for some applications, AC currents can appear in the coil. It is then of utmost importance to verify the magnitude of these AC currents and take into account AC losses generated on the tape in the design phase of such system. To assure a proper operation, it is also necessary to know tape characteristics during the device lifetime, which in normal operation conditions can be of decades. Continuous thermal cycles and mechanical stresses to which the tape is subjected can change its characteristics, changing important quantities like critical current (IC) and n-value. It is then also necessary to evaluate tape degradation due to these conditions. A study of AC losses will be here presented, for a short sample of BSCCO tape. IC and n-value degradation due to consecutive thermal cycles will also be studied.
Nuno Amaro; Ján Šouc; Michal Vojenčiak; Joao Murta Pina; João Martins; J. M. Ceballos; Fedor Gömöry. AC Losses and Material Degradation Effects in a Superconducting Tape for SMES Applications. Lecture Notes in Control and Information Sciences 2014, 417 -424.
AMA StyleNuno Amaro, Ján Šouc, Michal Vojenčiak, Joao Murta Pina, João Martins, J. M. Ceballos, Fedor Gömöry. AC Losses and Material Degradation Effects in a Superconducting Tape for SMES Applications. Lecture Notes in Control and Information Sciences. 2014; ():417-424.
Chicago/Turabian StyleNuno Amaro; Ján Šouc; Michal Vojenčiak; Joao Murta Pina; João Martins; J. M. Ceballos; Fedor Gömöry. 2014. "AC Losses and Material Degradation Effects in a Superconducting Tape for SMES Applications." Lecture Notes in Control and Information Sciences , no. : 417-424.
Superconducting coils (SC) are the core elements of Superconducting Magnetic Energy Storage (SMES) systems. It is thus fundamental to model and implement SC elements in a way that they assure the proper operation of the system, while complying with design specifications. As a part of a larger model, a coil design model is here presented and verified with tests made in a laboratory prototype. The limitations of the superconducting tape used, namely the negative effect of magnetic field components on its critical current value, are also verified and a possible solution to avoid that effect is studied.
Nuno Amaro; João Murta Pina; João Martins; José Maria Ceballos. A Study on Superconducting Coils for Superconducting Magnetic Energy Storage (SMES) Applications. IFIP Advances in Information and Communication Technology 2013, 449 -456.
AMA StyleNuno Amaro, João Murta Pina, João Martins, José Maria Ceballos. A Study on Superconducting Coils for Superconducting Magnetic Energy Storage (SMES) Applications. IFIP Advances in Information and Communication Technology. 2013; ():449-456.
Chicago/Turabian StyleNuno Amaro; João Murta Pina; João Martins; José Maria Ceballos. 2013. "A Study on Superconducting Coils for Superconducting Magnetic Energy Storage (SMES) Applications." IFIP Advances in Information and Communication Technology , no. : 449-456.
Superconducting magnetic energy storage (SMES) is characterized by low-energy density but high-power density, making this an unfeasible approach for bulk energy storage. Nevertheless, there are applications where high amounts of power must be available for a short period of time, like power quality applications. The core element of SMES is the superconducting coil. Different approaches are found in the literature considering the modeling of this component, either for design or simulation purposes. These usually consist of analytical or numerical approaches. The former allows fast results, but only considers geometric effects. The latter provides accurate results, considering, besides electromagnetic, also mechanical and thermal effects. In this paper, a review of these models is performed, and analytical models are used in an algorithm that allows optimizing equivalent inductance for a specified length of tape. Two small prototypes are fabricated, and experimental measurements carried out, in order to validate the models that are in the base of the proposed algorithm.
Nuno Amaro; João M. Pina; João Martins; J. M. Ceballos; A. Alvarez. A Fast Algorithm for Initial Design of HTS Coils for SMES Applications. IEEE Transactions on Applied Superconductivity 2012, 23, 4900104 -4900104.
AMA StyleNuno Amaro, João M. Pina, João Martins, J. M. Ceballos, A. Alvarez. A Fast Algorithm for Initial Design of HTS Coils for SMES Applications. IEEE Transactions on Applied Superconductivity. 2012; 23 (3):4900104-4900104.
Chicago/Turabian StyleNuno Amaro; João M. Pina; João Martins; J. M. Ceballos; A. Alvarez. 2012. "A Fast Algorithm for Initial Design of HTS Coils for SMES Applications." IEEE Transactions on Applied Superconductivity 23, no. 3: 4900104-4900104.
Nuno Amaro; João Murta Pina; João Martins; José Maria Ceballos. SUPERCONDUCTING MAGNETIC ENERGY STORAGE - A Technological Contribute to Smart Grid Concept Implementation. 1st International Conference on Smart Grids and Green IT Systems 2012, 113 -120.
AMA StyleNuno Amaro, João Murta Pina, João Martins, José Maria Ceballos. SUPERCONDUCTING MAGNETIC ENERGY STORAGE - A Technological Contribute to Smart Grid Concept Implementation. 1st International Conference on Smart Grids and Green IT Systems. 2012; ():113-120.
Chicago/Turabian StyleNuno Amaro; João Murta Pina; João Martins; José Maria Ceballos. 2012. "SUPERCONDUCTING MAGNETIC ENERGY STORAGE - A Technological Contribute to Smart Grid Concept Implementation." 1st International Conference on Smart Grids and Green IT Systems , no. : 113-120.