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Energy communities, mostly microgrid based, are a key stakeholder of modern electrical power grids. Operating a microgrid based energy community is a challenging topic due to the involved uncertainties, complexities and often conflicting objectives. The aim of this paper is to present a novel methodology demonstrating that energy community flexibility can contribute to each community member’s wellbeing when a grid fault occurs. A three-house energy community will be modelled considering as consumption sources non-controllable and controllable devices in each house. As power supply sources, PV systems installed in a community’s houses are considered, as well as the power obtained from main grid. Each house’s flexibility inside the community will be studied to improve the management of loads during a fault occurrence. Moreover, three different scenarios will be considered with different available power in the community. With these simulations, it was possible to understand that houses’ energy flexibility can be used under a fault situation, either to maintain the users’ wellbeing or to change the energy flow. Furthermore, energy flexibility can be used to create better energy price markets, to improve the resilience of the grid, or even to consider electrical vehicles’ connection to a community’s grid.
Adriana Mar; Pedro Pereira; João Martins. Energy Community Flexibility Solutions to Improve Users’ Wellbeing. Energies 2021, 14, 3403 .
AMA StyleAdriana Mar, Pedro Pereira, João Martins. Energy Community Flexibility Solutions to Improve Users’ Wellbeing. Energies. 2021; 14 (12):3403.
Chicago/Turabian StyleAdriana Mar; Pedro Pereira; João Martins. 2021. "Energy Community Flexibility Solutions to Improve Users’ Wellbeing." Energies 14, no. 12: 3403.
Oscar Lucia; Joao Martins; Yousef Ibrahim; Kazuhiro Umetani; Luis Gomes; Eiji Hiraki; Houcine Zeroug; Milos Manic. Industrial Electronics Education: Past, Present, and Future Perspectives. IEEE Industrial Electronics Magazine 2021, 15, 140 -154.
AMA StyleOscar Lucia, Joao Martins, Yousef Ibrahim, Kazuhiro Umetani, Luis Gomes, Eiji Hiraki, Houcine Zeroug, Milos Manic. Industrial Electronics Education: Past, Present, and Future Perspectives. IEEE Industrial Electronics Magazine. 2021; 15 (1):140-154.
Chicago/Turabian StyleOscar Lucia; Joao Martins; Yousef Ibrahim; Kazuhiro Umetani; Luis Gomes; Eiji Hiraki; Houcine Zeroug; Milos Manic. 2021. "Industrial Electronics Education: Past, Present, and Future Perspectives." IEEE Industrial Electronics Magazine 15, no. 1: 140-154.
As energy generation based on renewable resources does not always match energy consumption profiles, Positive Energy Districts (PEDs) should embody energy flexibility technologies to decrease possible negative impacts on existing grids due to, e.g., reverse power flows. As part of the EU H2020 Smart Cities and Communities project POCITYF, the cities Alkmaar (NL) and Évora (PT) aim to support the deployment and market uptake of such districts and in doing so demonstrate innovative and integrated technologies to enable flexibility in the energy system. This paper addresses implementation conditions for energy flexibility technologies that help cities to engender the expected impact and ensure replication of these technologies to other sites. It aims to guide both urban planners and technology solution providers through pitfalls and opportunities that can appear during the design and implementation of PEDs. Taking this into consideration, the RUGGEDISED innovation and implementation framework for smart city technology was taken as a starting point to describe and analyze the experiences in Alkmaar and Évora.
Nienke Maas; Vasiliki Georgiadou; Stephanie Roelofs; Rui Lopes; Anabela Pronto; João Martins. Implementation Framework for Energy Flexibility Technologies in Alkmaar and Évora. Energies 2020, 13, 5811 .
AMA StyleNienke Maas, Vasiliki Georgiadou, Stephanie Roelofs, Rui Lopes, Anabela Pronto, João Martins. Implementation Framework for Energy Flexibility Technologies in Alkmaar and Évora. Energies. 2020; 13 (21):5811.
Chicago/Turabian StyleNienke Maas; Vasiliki Georgiadou; Stephanie Roelofs; Rui Lopes; Anabela Pronto; João Martins. 2020. "Implementation Framework for Energy Flexibility Technologies in Alkmaar and Évora." Energies 13, no. 21: 5811.
The power electronic converter design is essential for the operation of the switched reluctance motor (SRM). Thus, a fault-tolerant power converter is fundamental to ensure high reliability and extend the drive operation. To achieve fault tolerance, fault detection and diagnosis methods are critical in order to identify, as soon as possible, the failure mode of the drive. To provide such capability, it is proposed in this paper a new fault-tolerant power converter scheme combined with a fault detection method regarding the most common power semiconductors failures in SRM drives. The fast and reliable proposed diagnosis method is based on the entropy theory. Based on this theory, normalized indexes (diagnostic variables) are created, which are independent from the load and speed of the motor. Through this method, it is possible to identify the faulty leg, as well as the type of power semiconductor fault. To test and evaluate the proposed solution several laboratory experiments were carried out using a 2 kW four-phase 8 / 6 SRM.
Vitor F. Pires; Tito G. Amaral; Armando Cordeiro; Daniel Foito; Armando J. Pires; João F. Martins. Fault-Tolerant SRM Drive with a Diagnosis Method Based on the Entropy Feature Approach. Applied Sciences 2020, 10, 3516 .
AMA StyleVitor F. Pires, Tito G. Amaral, Armando Cordeiro, Daniel Foito, Armando J. Pires, João F. Martins. Fault-Tolerant SRM Drive with a Diagnosis Method Based on the Entropy Feature Approach. Applied Sciences. 2020; 10 (10):3516.
Chicago/Turabian StyleVitor F. Pires; Tito G. Amaral; Armando Cordeiro; Daniel Foito; Armando J. Pires; João F. Martins. 2020. "Fault-Tolerant SRM Drive with a Diagnosis Method Based on the Entropy Feature Approach." Applied Sciences 10, no. 10: 3516.
The increase of distributed generation units in low voltage distribution grids, stimulated by different mechanisms (mostly economic), like the Energy Performance of Buildings Directive in Europe and the associated nearly-Zero Energy Building concept, stresses in-depth research on the possible impacts that such generation may impose on fundamental grid equipment such as distribution transformers. Taking this into consideration, this paper has two main objectives: i) to analyze the impacts of distributed generation on a non-residential building supplied by a dedicated distribution transformer when this building is converted to a nearly-Zero Energy Building; and ii) to develop a Transformer Anti-Aging Protection System (TAAPS) that mitigates existing negative impacts in order to reduce transformer aging. The present study is based on 1-year, 1-min resolution, real electricity demand and weather data and uses the standard IEC 60076-7 (Loading Guide For Oil-immersed Power Transformers) to model the transformer aging. The collected results show that the introduction of distributed generation increases transformer aging and that the proposed protection system (TAAPS) fulfills its objectives preventing the excessive aging. An economic analysis, related with the proposed system, is also provided in this paper.
Humberto Queiroz; Rui Amaral Lopes; João Martins. Automated energy storage and curtailment system to mitigate distribution transformer aging due to high renewable energy penetration. Electric Power Systems Research 2020, 182, 106199 .
AMA StyleHumberto Queiroz, Rui Amaral Lopes, João Martins. Automated energy storage and curtailment system to mitigate distribution transformer aging due to high renewable energy penetration. Electric Power Systems Research. 2020; 182 ():106199.
Chicago/Turabian StyleHumberto Queiroz; Rui Amaral Lopes; João Martins. 2020. "Automated energy storage and curtailment system to mitigate distribution transformer aging due to high renewable energy penetration." Electric Power Systems Research 182, no. : 106199.
Reliability in the electrical drives is becoming an important issue in many applications. In this context, the reliability associated to the switched reluctance machine (SRM) is also an important area of research. One of the major problems, that strongly affect its operation, are drive power semiconductors faults. Typical power converter topologies used in SRM drives cannot handle faults in their power semiconductors. So, this paper presents a power converter topology that provides fault-tolerant capabilities to the drive under a switch fault. This power converter will be used considering that a change in the direction of the current that flows in the SRM windings does not affect the behavior of the machine. Besides that, the proposed power converter will allow to generate multilevel phase voltages in order to apply different voltage levels as function of the SRM speed. A laboratory power converter was developed to test the SRM drive in normal and faulty conditions. From the obtained results it was possible to verify the fault-tolerant capability of the drive under switch faults in different devices and failure modes. It was also possible to confirm the multilevel operation of the drive.
V. Fernao Pires; Armando Cordeiro; Daniel Foito; A. J. Pires; J. F. Martins; Hao Chen. A Multilevel Fault-Tolerant Power Converter for a Switched Reluctance Machine Drive. IEEE Access 2020, 8, 21917 -21931.
AMA StyleV. Fernao Pires, Armando Cordeiro, Daniel Foito, A. J. Pires, J. F. Martins, Hao Chen. A Multilevel Fault-Tolerant Power Converter for a Switched Reluctance Machine Drive. IEEE Access. 2020; 8 (99):21917-21931.
Chicago/Turabian StyleV. Fernao Pires; Armando Cordeiro; Daniel Foito; A. J. Pires; J. F. Martins; Hao Chen. 2020. "A Multilevel Fault-Tolerant Power Converter for a Switched Reluctance Machine Drive." IEEE Access 8, no. 99: 21917-21931.
This paper describes a system to support the development and assessment of methodologies that explore the energy flexibility provided by electric water heaters. The proposed system follows a modular approach and allows users to share and remotely control the referred devices. The operation of this system is presented in this paper considering a case study where the energy flexibility provided by a 100 L electric water heater is used to reduce electricity costs under the Portuguese tariff context. The collected results reveal that increasing the available energy flexibility leads to larger savings. These results also show that the referred savings depend on the instant associated to hot water consumption events.
Tiago Pereira; Rui Amaral Lopes; João Martins. Exploring the Energy Flexibility of Electric Water Heaters. Energies 2019, 13, 46 .
AMA StyleTiago Pereira, Rui Amaral Lopes, João Martins. Exploring the Energy Flexibility of Electric Water Heaters. Energies. 2019; 13 (1):46.
Chicago/Turabian StyleTiago Pereira; Rui Amaral Lopes; João Martins. 2019. "Exploring the Energy Flexibility of Electric Water Heaters." Energies 13, no. 1: 46.
One of the most critical infrastructures in the world is electrical power grids (EPGs). New threats affecting EPGs, and their different consequences, are analyzed in this survey along with different approaches that can be taken to prevent or minimize those consequences, thus improving EPG resilience. The necessity for electrical power systems to become resilient to such events is becoming compelling; indeed, it is important to understand the origins and consequences of faults. This survey provides an analysis of different types of faults and their respective causes, showing which ones are more reported in the literature. As a result of the analysis performed, it was possible to identify four clusters concerning mitigation approaches, as well as to correlate them with the four different states of the electrical power system resilience curve.
Adriana Mar; Pedro Pereira; João F. Martins. A Survey on Power Grid Faults and Their Origins: A Contribution to Improving Power Grid Resilience. Energies 2019, 12, 4667 .
AMA StyleAdriana Mar, Pedro Pereira, João F. Martins. A Survey on Power Grid Faults and Their Origins: A Contribution to Improving Power Grid Resilience. Energies. 2019; 12 (24):4667.
Chicago/Turabian StyleAdriana Mar; Pedro Pereira; João F. Martins. 2019. "A Survey on Power Grid Faults and Their Origins: A Contribution to Improving Power Grid Resilience." Energies 12, no. 24: 4667.
The proliferation of residential photovoltaic (PV) prosumers leads to detrimental impacts on the low-voltage (LV) distribution network operation such as reverse power flow, voltage fluctuations and voltage imbalances. This is due to the fact that the strategies for the PV inverters are usually designed to obtain the maximum energy from the panels. The most recent approach to these issues involves new inverter-based solutions. This paper proposes a novel comprehensive control strategy for the power electronic converters associated with PV installations to improve the operational performance of a four-wire LV distribution network. The objectives are to try to balance the currents demanded by consumers and to compensate the reactive power demanded by them at the expense of the remaining converters’ capacity. The strategy is implemented in each consumer installation, constituting a decentralized or distributed control and allowing its practical implementation based on local measurements. The algorithms were tested, in a yearly simulation horizon, on a typical Portuguese LV network to verify the impact of the high integration of the renewable energy sources in the network and the effectiveness and applicability of the proposed approach.
Fermín Barrero-González; Victor Fernão Pires; José L. Sousa; João F. Martins; María Isabel Milanés-Montero; Eva González-Romera; Enrique Romero-Cadaval. Photovoltaic Power Converter Management in Unbalanced Low Voltage Networks with Ancillary Services Support. Energies 2019, 12, 972 .
AMA StyleFermín Barrero-González, Victor Fernão Pires, José L. Sousa, João F. Martins, María Isabel Milanés-Montero, Eva González-Romera, Enrique Romero-Cadaval. Photovoltaic Power Converter Management in Unbalanced Low Voltage Networks with Ancillary Services Support. Energies. 2019; 12 (6):972.
Chicago/Turabian StyleFermín Barrero-González; Victor Fernão Pires; José L. Sousa; João F. Martins; María Isabel Milanés-Montero; Eva González-Romera; Enrique Romero-Cadaval. 2019. "Photovoltaic Power Converter Management in Unbalanced Low Voltage Networks with Ancillary Services Support." Energies 12, no. 6: 972.
Microgrids of prosumers are a trendy approach within the smart grid concept, as a way to increase distributed renewable energy penetration within power systems in an efficient and sustainable way. Single prosumer individual management has been previously discussed in literature, usually based on economic profit optimization. In this paper, two novel approaches are proposed: firstly, a different objective function, relative to the mismatch between generated and demanded power, is tested and compared to classical objective function based on energy price, by means of a genetic algorithm method; secondly, this optimization procedure is applied to batteries’ coordinated scheduling of all the prosumers composing a community, instead of single one, which better matches the microgrid concept. These approaches are tested on a microgrid with two household prosumers, in the context of Spanish regulation for self-consumption. Results show noticeably better performance of mismatch objective function and coordinated schedule, in terms of self-consumption and self-sufficiency rates, power and energy interchanges with the main grid, battery degradation and even economic benefits.
Eva González-Romera; Mercedes Ruiz-Cortés; María-Isabel Milanés-Montero; Fermín Barrero-González; Enrique Romero-Cadaval; Rui Amaral Lopes; João Martins. Advantages of Minimizing Energy Exchange Instead of Energy Cost in Prosumer Microgrids. Energies 2019, 12, 719 .
AMA StyleEva González-Romera, Mercedes Ruiz-Cortés, María-Isabel Milanés-Montero, Fermín Barrero-González, Enrique Romero-Cadaval, Rui Amaral Lopes, João Martins. Advantages of Minimizing Energy Exchange Instead of Energy Cost in Prosumer Microgrids. Energies. 2019; 12 (4):719.
Chicago/Turabian StyleEva González-Romera; Mercedes Ruiz-Cortés; María-Isabel Milanés-Montero; Fermín Barrero-González; Enrique Romero-Cadaval; Rui Amaral Lopes; João Martins. 2019. "Advantages of Minimizing Energy Exchange Instead of Energy Cost in Prosumer Microgrids." Energies 12, no. 4: 719.
Oleksandr Husev; Carlos Roncero-Clemente; Elena Makovenko; Sergio Pires Pimentel; Dmitri Vinnikov; Joao Martins. Optimization and Implementation of the Proportional-Resonant Controller for Grid-Connected Inverter With Significant Computation Delay. IEEE Transactions on Industrial Electronics 2019, 67, 1201 -1211.
AMA StyleOleksandr Husev, Carlos Roncero-Clemente, Elena Makovenko, Sergio Pires Pimentel, Dmitri Vinnikov, Joao Martins. Optimization and Implementation of the Proportional-Resonant Controller for Grid-Connected Inverter With Significant Computation Delay. IEEE Transactions on Industrial Electronics. 2019; 67 (2):1201-1211.
Chicago/Turabian StyleOleksandr Husev; Carlos Roncero-Clemente; Elena Makovenko; Sergio Pires Pimentel; Dmitri Vinnikov; Joao Martins. 2019. "Optimization and Implementation of the Proportional-Resonant Controller for Grid-Connected Inverter With Significant Computation Delay." IEEE Transactions on Industrial Electronics 67, no. 2: 1201-1211.
Active photovoltaic-thermal (PV-T) systems for solar heating and electricity generation are likely to employ the same differential temperature pump controllers as equivalent non-hybrid solar thermal (ST) systems. However, the typical controller setpoint selection methods for cost-effective and stable pump operation fail to consider the effect on photovoltaic (PV) electricity generation taking place in PV-T systems. Analytical relations for the same goals were derived to anticipate this influence using the steady-state Florschuetz PV-T collector model and compared with equivalent numerical methods relying on an extension of the Perers model designed to encompass PV-T collectors, namely by modelling electricity generation and the associated thermal performance reduction. Both methods indicate the minimum turn-on and turn-off setpoints for cost-effective and stable operation increase and decrease, respectively, relative to those for non-hybrid operation of PV-T systems or equivalent non-hybrid systems, and more so at higher irradiance levels, though the variations are shown not to be significant for a range of PV-T systems represented and can be reasoned to be inflated or of limited practical relevance. In conclusion, the effect of pump operation on electricity generation is not predicted to be a determining factor for differential temperature controller setpoint selection in PV-T systems.
Pedro Magalhães; João Martins; António Joyce. On Differential Temperature Controller Setpoint Selection for Active Photovoltaic-Thermal (PV-T) Systems. European Journal of Sustainable Development Research 2019, 3, 1 .
AMA StylePedro Magalhães, João Martins, António Joyce. On Differential Temperature Controller Setpoint Selection for Active Photovoltaic-Thermal (PV-T) Systems. European Journal of Sustainable Development Research. 2019; 3 (1):1.
Chicago/Turabian StylePedro Magalhães; João Martins; António Joyce. 2019. "On Differential Temperature Controller Setpoint Selection for Active Photovoltaic-Thermal (PV-T) Systems." European Journal of Sustainable Development Research 3, no. 1: 1.
Solid State Transformers (SST) may become, in the near future, key technological enablers for decentralized energy supply systems. They have the potential to unleash new technologies and operation strategies of microgrids and prosumers to move faster towards a low carbon-based economy. This work proposes a paradigm change in the hierarchically and distributed operated power systems where SSTs are used to asynchronously connect the many small low voltage (LV) distribution networks, such as clusters of prosumers or LV microgrids, to the bulk power system. The need for asynchronously coupled microgrids requires a design that allows the LV system to operate independently from the bulk grid and to rely on its own control systems. The purpose of this new approach is to achieve immune and resilient by design configurations that allow maximizing the integration of Local Renewable Energy Resources (L-RES). The paper analyses from the stability point of view, through simplified numerical simulations, the way in which SST-interconnected microgrids can become immune to disturbances that occur in the bulk power system and how sudden changes in the microgrid can damp out at the Point of Common Coupling (PCC), thus achieving better reliability and predictability in both systems and enabling strong and healthy distributed energy storage systems (DESSs). Moreover, it is shown that in a fully inverter-based microgrid there is no need for mechanical or synthetic inertia to stabilize the microgrid during power unbalances. This happens because the electrostatic energy stored in the capacitors connected behind the SST inverter can be used for a brief time interval, until automation is activated to address the power unbalance for a longer term.
Mihai Sanduleac; João F. Martins; Irina Ciornei; Mihaela Albu; Lucian Toma; Vitor Fernão Pires; Lenos Hadjidemetriou; Rooktabir Sauba. Resilient and Immune by Design Microgrids Using Solid State Transformers. Energies 2018, 11, 3377 .
AMA StyleMihai Sanduleac, João F. Martins, Irina Ciornei, Mihaela Albu, Lucian Toma, Vitor Fernão Pires, Lenos Hadjidemetriou, Rooktabir Sauba. Resilient and Immune by Design Microgrids Using Solid State Transformers. Energies. 2018; 11 (12):3377.
Chicago/Turabian StyleMihai Sanduleac; João F. Martins; Irina Ciornei; Mihaela Albu; Lucian Toma; Vitor Fernão Pires; Lenos Hadjidemetriou; Rooktabir Sauba. 2018. "Resilient and Immune by Design Microgrids Using Solid State Transformers." Energies 11, no. 12: 3377.
Integration of renewable energy sources, active role of consumers and energy management systems are currently among research priorities in energy systems. This paper proposes an innovative coordinated energy scheduling for a microgrid of neighbor prosumers with different consumption patterns. All prosumers have photovoltaic generation systems, Li-ion batteries as energy storage systems and regular household loads. A genetic algorithm is used to schedule each prosumer's battery charge/discharge, with the aim of reducing energy exchange losses by minimizing the power in the point of interconnection of the microgrid with the main grid, with several advantages compared to classical optimization objectives, and without worsening battery lifespan degradation. Individual and coordinated strategies are compared and self-consumption and self-sufficiency of the prosumers' set are evaluated with the aim of showing the advantage of coordination. The paper concludes that coordinated operation can contribute to improve the exploitation of energy resources in the prosumer microgrid, reducing the amount of energy interchanged with the distribution grid by approximately 13%, and, at the same time, avoiding increasing the battery cycling and consequent degradation.
Mercedes Ruiz-Cortes; Eva Gonzalez-Romera; Rui Amaral-Lopes; Enrique Romero-Cadaval; João Martins; Maria Isabel Milanes-Montero; Fermin Barrero-Gonzalez. Optimal Charge/Discharge Scheduling of Batteries in Microgrids of Prosumers. IEEE Transactions on Energy Conversion 2018, 34, 468 -477.
AMA StyleMercedes Ruiz-Cortes, Eva Gonzalez-Romera, Rui Amaral-Lopes, Enrique Romero-Cadaval, João Martins, Maria Isabel Milanes-Montero, Fermin Barrero-Gonzalez. Optimal Charge/Discharge Scheduling of Batteries in Microgrids of Prosumers. IEEE Transactions on Energy Conversion. 2018; 34 (1):468-477.
Chicago/Turabian StyleMercedes Ruiz-Cortes; Eva Gonzalez-Romera; Rui Amaral-Lopes; Enrique Romero-Cadaval; João Martins; Maria Isabel Milanes-Montero; Fermin Barrero-Gonzalez. 2018. "Optimal Charge/Discharge Scheduling of Batteries in Microgrids of Prosumers." IEEE Transactions on Energy Conversion 34, no. 1: 468-477.
The raison d’être of museums are their collections. Museums’ main purpose is to collect, preserve exhibit and interpret the objects of artistic, cultural, historical, or scientific significance for the higher reasons of education, study and enjoyment. Museum objects are information carriers. In the Information and Communication Technologies era information about museum objects is documented, organized and communicated with the help of information systems in virtual museums. Considering the working definition of the ViMM project, a virtual museum (VM) can be considered a digital entity that, considering the museum’s specificities, enhances, complements, or augments the museum through interactivity, personalization, user experience and richness of content. The virtual museums’ context is organized with the help of metadata, the data about the data. This paper presents the main metadata standards used by virtual museums and the qualitative results of an extensive survey conducted in the framework of the ViMM project for identifying the strengths and weaknesses of the main used metadata standards.
Stella Sylaiou; Elena Lagoudi; João Martins. Metadata Standards for Virtual Museums. Transactions on Petri Nets and Other Models of Concurrency XV 2018, 483 -497.
AMA StyleStella Sylaiou, Elena Lagoudi, João Martins. Metadata Standards for Virtual Museums. Transactions on Petri Nets and Other Models of Concurrency XV. 2018; ():483-497.
Chicago/Turabian StyleStella Sylaiou; Elena Lagoudi; João Martins. 2018. "Metadata Standards for Virtual Museums." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 483-497.
Tourism is an industry that has been growing rapidly in the last few years and it is expected that it will continue to grow. Due to the evolution of technology, mobile applications are being increasingly used in all kinds of industries, being one of them tourism. Presently there are already a few mobile applications used to increase the experience of the user when visiting a place, but these mobile applications lack some important features. This paper describes the development of a mobile application with integrated routing algorithms used to increase the experience of the tourists when visiting the city of Avila, Spain. The tourist will have at their disposal real time information about all the monuments available for visit, a full set of predefined circuits with different visit times and degrees of difficulty and also the possibility to create an optimized or personalized circuit combining the user preferences such as visiting time and number of monuments to visit.
Mário Amorim; Adriana Mar; Fernando Monteiro; Stella Sylaiou; Pedro Pereira; João Martins. Smart Tourism Routes Based on Real Time Data and Evolutionary Algorithms. Privacy Enhancing Technologies 2018, 417 -426.
AMA StyleMário Amorim, Adriana Mar, Fernando Monteiro, Stella Sylaiou, Pedro Pereira, João Martins. Smart Tourism Routes Based on Real Time Data and Evolutionary Algorithms. Privacy Enhancing Technologies. 2018; ():417-426.
Chicago/Turabian StyleMário Amorim; Adriana Mar; Fernando Monteiro; Stella Sylaiou; Pedro Pereira; João Martins. 2018. "Smart Tourism Routes Based on Real Time Data and Evolutionary Algorithms." Privacy Enhancing Technologies , no. : 417-426.
In conservation of cultural heritage (CCH), experts from diverse areas of knowledge work together, each of them contributing unique expertise. However, in modern dynamic multi- and interdisciplinary collaboration, new contributors often remain conservation outsiders, being deeply submerged in their own research areas with regard to their research methods, their view of hierarchy of aims and values of conservation of cultural heritage, etc. Their understanding of targets of input and outcome of their compartmentalized contribution to specific conservation problems might be incompatible with the principles and criteria of modern CCH, thus affecting productivity of such contribution. This paper focuses on this conflict by examining selected relevant aspects based on the experience of the collaborative interdisciplinary research in conservation of cultural heritage.
Anna Lobovikov-Katz; João Martins; Marinos Ioannides; Dalik Sojref; Christian Degrigny. Interdisciplinarity of Cultural Heritage Conservation Making and Makers: Through Diversity Towards Compatibility of Approaches. Privacy Enhancing Technologies 2018, 623 -638.
AMA StyleAnna Lobovikov-Katz, João Martins, Marinos Ioannides, Dalik Sojref, Christian Degrigny. Interdisciplinarity of Cultural Heritage Conservation Making and Makers: Through Diversity Towards Compatibility of Approaches. Privacy Enhancing Technologies. 2018; ():623-638.
Chicago/Turabian StyleAnna Lobovikov-Katz; João Martins; Marinos Ioannides; Dalik Sojref; Christian Degrigny. 2018. "Interdisciplinarity of Cultural Heritage Conservation Making and Makers: Through Diversity Towards Compatibility of Approaches." Privacy Enhancing Technologies , no. : 623-638.
This paper presents an intelligent energy storage system for NZEB buildings integrated in a smart grid context. The proposed methodology is suitable for NZEB buildings that include integrated renewable generation and storage capabilities, aiming at high load matching and low grid interaction, acting as a prosumer. The considered energy storage system is electrochemical storage (batteries) and the renewable production is based on PV panels. The energy storage management is based on a genetic algorithm approach that aims to increase the energy storage system return of investment by, at the same time, minimizing the grid energy consumption, on higher DSO tariff periods, and reducing the number of battery operating cycles. In this way the management system will increase the life time of the energy storage system and reduce the amount of money that the prosumer has to pay to the DSO operator.
Rodrigo Francisco; C. Roncero-Clemente; Rui Lopes; João Martins. Intelligent Energy Storage Management System for Smart Grid Integration. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society 2018, 6083 -6087.
AMA StyleRodrigo Francisco, C. Roncero-Clemente, Rui Lopes, João Martins. Intelligent Energy Storage Management System for Smart Grid Integration. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. 2018; ():6083-6087.
Chicago/Turabian StyleRodrigo Francisco; C. Roncero-Clemente; Rui Lopes; João Martins. 2018. "Intelligent Energy Storage Management System for Smart Grid Integration." IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society , no. : 6083-6087.
This paper studies and analyses the impacts introduced on Distribution Transformer (DT) overload due to the integration of nearly Zero-Energy Buildings (NZEBS) into existing distribution Low Voltage Grids (LVG). The negative impacts on the DT are studied and explained. For high nZEB integration levels, this study reveals that the subsequent reverse power flows can achieve higher values, especially around noon, than the DT rated (and overload limit) power thus accelerating its aging. A power electronics based Energy Storage System (ESS) is considered to mitigate these negative effects. The paper also analysis the mitigation of the negative DTs impact by considering this ESS solution. The established control laws prevent the transformer to be exposed to excessive reverse power flow levels.
Renato Verlssimo; Rui Amaral Lopes; João Martins. Energy Storage Systems to Prevent Distribution Transformers Overload with High NZEB Penetration. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society 2018, 6071 -6076.
AMA StyleRenato Verlssimo, Rui Amaral Lopes, João Martins. Energy Storage Systems to Prevent Distribution Transformers Overload with High NZEB Penetration. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. 2018; ():6071-6076.
Chicago/Turabian StyleRenato Verlssimo; Rui Amaral Lopes; João Martins. 2018. "Energy Storage Systems to Prevent Distribution Transformers Overload with High NZEB Penetration." IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society , no. : 6071-6076.
This work presents an energy management strategy based on scheduling battery operation in prosumer systems, according to forecast data available 24 hours in advance. The proposed method seeks to reach a beneficial compromise between prosumers and distribution grid operators, independently of specific economic context or technical regulations. An improvement to deal with forecast inaccuracy is carried out. Results demonstrate that it offers good properties regarding energy management, with a stored energy reserve estimation, battery lifetime preservation and self-consumption and self-sufficiency enhancement.
Mercedes Ruiz-Cortes; Eva Gonzalez-Romera; Rui Amaral Lopes; Enrique Romero-Cadaval; João Martins; Maria Isabel Milanes-Montero; Fermin Barreto-Gonzalez. Improved Forecasting-Based Battery Energy Management Strategy for Prosumer Systems. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society 2018, 6077 -6082.
AMA StyleMercedes Ruiz-Cortes, Eva Gonzalez-Romera, Rui Amaral Lopes, Enrique Romero-Cadaval, João Martins, Maria Isabel Milanes-Montero, Fermin Barreto-Gonzalez. Improved Forecasting-Based Battery Energy Management Strategy for Prosumer Systems. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. 2018; ():6077-6082.
Chicago/Turabian StyleMercedes Ruiz-Cortes; Eva Gonzalez-Romera; Rui Amaral Lopes; Enrique Romero-Cadaval; João Martins; Maria Isabel Milanes-Montero; Fermin Barreto-Gonzalez. 2018. "Improved Forecasting-Based Battery Energy Management Strategy for Prosumer Systems." IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society , no. : 6077-6082.