A5089734589- Microgrid Control and Optimization
- Smart Grid Energy Management
- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- Photovoltaic System Optimization Techniques
- Machine Fault Diagnosis Techniques
- Electric Motor Design and Analysis
- Smart Grid Security and Resilience
- Silicon Carbide Semiconductor Technologies
- Advanced Battery Technologies Research
- Building Energy and Comfort Optimization
- Experimental Learning in Engineering
- Physics of Superconductivity and Magnetism
- Energy Load and Power Forecasting
- Fault Detection and Control Systems
- Magnetic Properties and Applications
- Energy Efficiency and Management
- Islanding Detection in Power Systems
- Magnetic Bearings and Levitation Dynamics
- Non-Destructive Testing Techniques
- HVDC Systems and Fault Protection
- Sensorless Control of Electric Motors
- Induction Heating and Inverter Technology
- Power Quality and Harmonics
- Neural Networks and Applications
Universidade Nova de Lisboa
2016-2025
University of Lisbon
2015-2024
Uninova
2015-2024
Instituto Politecnico de Setubal
2004-2023
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
1998-2023
University of Minho
2018-2023
Hospital de São João
2022
Efacec (Portugal)
2022
University of Bucharest
2021
Universitatea Națională de Știință și Tehnologie Politehnica București
2021
Over the years middleboxes have become a fundamental part of today's networks. Despite their usefulness, they come with number problems, many which arise from fact that are hardware-based: costly, difficult to manage, and functionality is hard or impossible change, name few.To address these issues, there recent trend towards network function virtualization (NFV), in essence proposing turn into software-based, virtualized entities. Towards this goal we introduce ClickOS, high-performance,...
The high variability of solar irradiance, originated by moving clouds, causes fluctuations in Photovoltaic (PV) power generation, and can negatively impact the grid stability. For this reason, codes have incorporated ramp-rate limitations for injected PV power. Energy Storage Systems (ESS) coordinated (RR) control algorithms are often applied mitigating these to grid. These generate a reference ESS that opposes fluctuations, reducing them an acceptable value. Despite their common use, few...
The microgrid vision contains several aspects, and a commonly admitted one is portion of grid with its own means production energy flow controls. Photovoltaic (PV) generation geographically the most distributed electricity production. In this sense, integration PVs in microgrids seems natural. intermittency PV can be compensated not only by using storage technologies but also demand-side management exchanges other power networks: main surrounding microgrids. Many aspects still have to...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, an automatic algorithm based unsupervised neural network for on-line diagnostics of three-phase induction motor stator fault is presented. This uses the alfa-beta currents as input variables. Then, a fully method applied in which Hebbian-based used to extract principal components current data. These main directions are decide where occurs and relationship between calculated verify...
Network middleboxes must offer high availability, with automatic failover when a device fails. Achieving availability is challenging because correctly restore lost state (e.g., activity logs, port mappings) but do so quickly in less than typical transport timeout values to minimize disruption applications) and little overhead failure-free operation additional per-packet latencies of 10-100s us). No existing middlebox design provides that correct, fast recover, imposes increased latency on...
This paper presents a three-phase multilevel quasi-Z-source inverter (qZSI) topology operating in normal and fault-tolerant operation mode. structure is composed by two symmetrical networks T-type inverter. Besides the intrinsic advantages of voltage source inverters, proposed also characterized their semiconductor fault tolerance capability. feature only obtained through changes on modulation scheme after does not require additional extra-phase legs or collective switching states. In...
The use of sensors and actuators as a form controlling cyber-physical systems in resource networks has been integrated referred to the Internet Things (IoT). However, connectivity many stand-alone IoT through introduces numerous cybersecurity challenges sensitive information is prone be exposed malicious users. This paper focuses on improvement from an ontological analysis, proposing appropriate security services adapted threats. authors propose ontology-based framework using knowledge...
This paper describes the tuning process of proportional-resonant controller, taking into account significant computational delay from digital control system. Different structures controller and related contradicting results are discussed. Particular attention is paid to stability domain its dependence on different parameters controller. The main outcome this consists in approach guidelines for selection case system delay. An optimal structure start-up current optimization proposed. All...
Integration of renewable energy sources, active role consumers, and management systems is currently among research priorities in systems. This paper proposes an innovative coordinated scheduling for a microgrid neighbor prosumers with different consumption patterns. All have photovoltaic generation systems, Li-ion batteries as storage regular household loads. A genetic algorithm used to schedule each prosumer's battery charge/discharge, the aim reducing exchange losses by minimizing power...
The growing concerns on environmental pollution and sustainability have raised the interest development of functional biobased materials for different applications, including food packaging, as an alternative to fossil fuel-based plastic counterparts, currently available in market. In this work, wood inspired biopolymeric nanocomposite films were prepared by solvent casting suspensions containing commercial beechwood xylans, cellulose nanofibers (CNF) lignosulfonates (magnesium or sodium), a...
This study presents a novel methodology for evaluating the flexibility of residential electricity consumers under diverse operational conditions introducing innovative indicators. The increasing demand energy from side is crucial ensuring power grid's economic stability and resilience. Buildings offer range potential sources that can be effectively leveraged this purpose. Accordingly, paper formulates flow management in Smart House using Mixed-Integer Linear Programming (MILP) framework,...
This paper develops an energy management system with integration of smart meters for electricity consumers in a grid context. The two types (SM) are developed: (i) consumer owned SM and (ii) distributor SM. runs over wireless platform–ZigBee protocol the uses wired environment–ModBus protocol. connected to SCADA (Supervisory Control And Data Acquisition) that supervises network Programmable Logic Controllers (PLC). system/PLC integrates different information coming from several technologies...
The smart grid concept is being fostered due to required evolution of the power network incorporate distributed energy sources (DES), renewable (RES), and electric vehicles (EVs). inclusion these components on requires an information communication technology (ICT) layer in order exchange information, control, monitor electrical grid. two-way flows brings cyber security issues Different countermeasures need be applied heterogeneous according computational resources availability, time...
One of the most critical infrastructures in world is electrical power grids (EPGs). New threats affecting EPGs, and their different consequences, are analyzed this survey along with approaches that can be taken to prevent or minimize those thus improving EPG resilience. The necessity for systems become resilient such events becoming compelling; indeed, it important understand origins consequences faults. This provides an analysis types faults respective causes, showing which ones more...
Microgrids of prosumers are a trendy approach within the smart grid concept, as way to increase distributed renewable energy penetration power systems in an efficient and sustainable way. Single prosumer individual management has been previously discussed literature, usually based on economic profit optimization. In this paper, two novel approaches proposed: firstly, different objective function, relative mismatch between generated demanded power, is tested compared classical function price,...
In this article, a novel axial flux double-stator switched reluctance motor (AFDSSRM) is presented and optimized for electric vehicle applications. AFDSSRM adopts the arrangement of inner rotor structure with full-pitch winding configuration. The generated by two stators cancels each other at unaligned position, then, low inductance barely affected saturation achieved, which primary advantage AFDSSRM. First, topology power equation are briefly. Due to large number dimensional parameters...