REE&PQJ-25. ISSN: 3020-531X Index
Renewable Energies, Environment & Power Quality Journal (REE&PQJ)
Volume 25, Issue 3, February 2026-> Go to (Issue 4)
If you want to see the articles published by RE&PQJ until 2023, click here.
541 |
242-246
Dual-Purpose dc-dc/ac PWM Modular Power Converter as Dual-Output Hybrid Converter C. Roncero-Clemente(1), J. Gutiérrez-Escalona(1), O. Matiushkin(1,2), O. Husev(3), E. Romero-Cadaval(1), V. Fernão Pires(4) 1. Electrical, Electronic and Control Engineering Department School of Industrial Engineering, University of Extremadura. Spain 2. Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology. Estonia 3. Department of Power Electronics and Electrical Machines, Gdańsk University of Technology. Poland 4. ESTSetúbal, Instituto Politécnico de Setúbal (Portugal), INESC-ID Lisboa. Portugal Abstract Power electronic converters play a crucial role in integrating renewable energy sources into modern electrical systems and enabling the development of hybrid nanogrids and microgrids. These systems typically feature an architecture that combines both dc and ac buses. Within this framework, dualpurpose converters have emerged, capable of interfacing with both dc and ac grids, thereby enhancing modularity and standardization in converter configurations...READ MORE 247-252
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First Approximation of Application of Federated Learning to Wind A. Gil Macia(1), J. Enrique Sierra-García(2), Matilde Santos(3) 1. Department of Computer Science and Automatic Control, UNED. Spain 2. Department of Digitalization, University of Burgos. Spain 3. Institute of Knowledge Technology, Complutense University of Madrid. Spain Abstract This work investigates the application of FederatedLearning techniques to reduce the training time of wind turbine power stabilization controllers on a wind farm. A Reinforcement Learning controller based on Q-learning is implemented and the results of the individual controller are compared with a system of 4 wind turbines using Federated Learning...READ MORE 253-258
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Carolina M. Martín, Francisco Arredondo, Santiago Arnaltes, Jaime Alonso-Martínez, José Luis Rodríguez-Amenedo Departamento de Ingeniería Eléctrica. Universidad Carlos III de Madrid. Spain Abstract This paper introduces a centralized reactive powermanagement strategy for the real-time (RT) operation of power systems. The proposed approach reformulates the Optimal Power Flow (OPF) problem to minimize system losses and redispatch costs while ensuring compliance with technical constraints. These include node voltage limits, line capacity, and operational limits of generating units...READ MORE 259-264
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Cristina Martín, M. A. González-Cagigal, Álvaro Rodríguez del Nozal, Juan M. Mauricio Department of Electrical Engineering. E.T.S.I. Seville University. Spain Abstract This paper presents an application of deepreinforcement learning (DRL) for controlling permanent magnet-assisted synchronous reluctance machines (PMA-SynRMs). A model-free DRL agent is trained to control the power converter switching states, aiming to accurately track current references...READ MORE 265-269
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Evaluation of the sensitivity of measuring circuits for corona discharges detection Milad Soltany, Jordi Roger Riba, Santiago Bogarra Department of Electrical Engineering.AMBER High-Voltage Laboratory, Universitat Politècnica de Catalunya. Spain Abstract Partial discharges (PD) play a major role in the degradation of insulation in high voltage equipment. PD occurs when localized electrical breakdowns occur in the presence of a high electric field near an insulator. A critical aspect of PD measurement is the calibration of the measurement system...READ MORE 270-274
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Ankit Soni(1,2), Jordi Roger Riba(1), Manuel Moreno-Eguilaz(1), Josep Sanllehí(2) 1. Department of Electrical Engineering. AMBER High-Voltage Laboratory, Universitat Politècnica de Catalunya. Spain 2. SICAME. Spain Abstract Transmission conductors used in overhead power lines are typically helically stranded and often have a steel core to give the conductor mechanical strength and outer strands of aluminium or aluminium alloy to provide the current carrying capacity. The presence of a magnetic core has several effects on the behaviour of the conductors, such as the presence of an axial component of the magnetic field which interacts with the current of the different layers of conductive strands wound helically around the magnetic core...READ MORE 275-278
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E. López, A. Castro, D. Tejada Energy Laboratory, National Institute of Aerospace Technology (INTA) Huelva. Spain Abstract Hydrogen produced from renewable sources willplay a pivotal role in the transition to a decarbonized economy, in particular in the transportation and industrial sector. However, this pathway faces several challenges in terms of cost, efficiency, lifetime, etc...READ MORE 279-284
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GA-based Optimization of a Surface-mounted Permanent Magnet P. Cruz-Romero, A. Rodríguez del Nozal, J. M. Mauricio, M.A. González-Cagigal Department of Electrical Engineering. E.T.S.I.,Sevilla University. Spain Abstract The paper deals with a simple procedure to design surface mounted permanent magnet synchronous machines, based on genetic algorithms scripted in Python library deap. The paper includes the formulas involved in the motor design, the operational constraints, the fitness functions (torque constant and motor weight), as well as the results obtained after running the algorithm in a case study...READ MORE 285-289
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Stability Analysis of Grid-following Converters in Power Systems S. Delgado-Sánchez, J. L. Rodríguez-Amenedo, S. Arnaltes Department of Electrical Engineering. Universidad Carlos III de Madrid. Spain Abstract The integration of renewable energy sources inpower systems has become a stability challenge. Their connection is made via power electronics, mostly using a grid-following control scheme. However, it has been proven that this type of control raises instability problems when they are connected to weak grids...READ MORE 290-295
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Local Flexibility Markets in Spain: Current Developments and Future Prospects J. Jimeno(1,2), I. Aranzabal(1), E. Fernández(1), C. Madina(2), P. Castillo(1) 1. Department of Electrical Engineering. UPV/EHU University of the Basque Country. School of Engineering Bilbao. Spain 2. TECNALIA, Basque Research and Technology Alliance (BRTA) Spain Abstract The increasing penetration of renewable generationin transmission and distribution networks, along with the electrification of end-use sectors, such as transportation and heating, is reshaping the power system. This transition, aligned with the European Union’s climate neutrality goals for 2050, requires new flexibility mechanisms to ensure grid stability...READ MORE 296-302
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Battery Management System for Energy Community Using a Cost-Sensitive Rule-Based algorithm Marcos Trujillo-Trujillo(1), Juan A. Méndez-Pérez(1), Santiago Torres-Álvarez (1), Alberto Hamilton-Castro(1) Jose M. Gonzalez-Cava(1), Iván Castilla-Rodríguez(1), Benjamín González-Díaz(2) 1. Departamento de Ingeniería Informática y de Sistemas, Universidad de La Laguna. Tenerife. Spain 2. Departamento de Ingeniería Industrial, Universidad de La Laguna. Tenerife. Spain Abstract Energy Communities (ECs) drive decentralized energy production and consumption, fostering active citizen participation. Within this framework, battery systems play a crucial role in efficiency and optimization, requiring an effective Battery Management System (BMS) to optimize energy control...READ MORE 303-308
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Impact of Hydroelectric Power Plants on the Electricity Market and Stability of the Electrical System Adelino J. C. Pereira(1,2,3), R. M. Monteiro Pereira(1,2,3) 1. Polytechnic University of Coimbra. Portugal 2. SUScita - Research Group on Sustainability, Cities and Urban Intelligence, Polytechnic Institute of Coimbra. Portugal 3. INESC Coimbra - Instituto de Engenharia de Sistemas e Computadores de Coimbra. Portugal Abstract Hydroelectric power plants are an extremely important part of the electricity market and one of the most reliable sources of renewable energy. The demand for electricity has gone up and so will the requirement of efficient and sustainable electricity generation. The role of hydroelectric power plants on the electricity market is in their contribution to a steady and stable supply of electricity which can reduce the intermittency of solar and wind power which is another renewable energy source...READ MORE 309-314
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L. Vejo, P. Castro, M. Mañana, A. Arroyo, S. Bustamante, A. Laso, E. Sainz, R. Lecuna Department of Electrical and Energy Engineering. University of Cantabria. Spain Abstract The continuous rise in global energy demand has necessitated the adaptation of conventional power systems to meet increasing consumption requirements and to enhance energy transmission capabilities. The transition from a centralized energy model to one based on renewable sources requires a shift from traditionally linear and radial transmission infrastructures to decentralized networks that integrate diverse renewable generation sources...READ MORE 315-320
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A study on the negative sequence current injection during LVRT of IBRsA A. Blázquez(1), M. Larruskain(1), E. Torres(1), P. Eguia(1), A. Castañon(2), R. Cimadevilla(2) 1. Department of Electrical Engineering. ESI-Bilbao, University of the Basque Country (UPV/EHU) Spain 2. ZIV. Spain Abstract Low Voltage Ride Through (LVRT) behaviour ofInverter Based Resources (IBR) during asymmetrical grid faults is dictated by the requirements of Grid Code (GC) at the Point of Common Coupling (PCC) of the renewable energy plants. Earlier GCs demanded only positive sequence current injection, which gave freedom to inverter manufacturers to implement different negative sequence injection strategies, while newer GCs define specific negative sequence current injection requirements...READ MORE 321-325
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Wind turbine anomaly detection using a support vector machine optimized with a Bayesian algorithm D. Coronel(1), C. Guevara(2), M. Santos(3) 1. Computer Science Faculty. University Complutense of Madrid. Spain 2. Quantitative Methods Department. CUNEF University. Spain 3. Institute of Knowledge Technology. Complutense University of Madrid. Spain Abstract Wind energy has experienced significant growth inrecent years; however, it still faces challenges in operation and maintenance, which impact energy efficiency and lead to high costs. This study proposes an anomaly detection model for wind turbines based on a support vector machine (SVM), optimized using Bayesian search...READ MORE 326-331
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Dynamic Energy Management System for Optimal Energy Dispatch in a Microgrid Cluster D. Carrasco-González(1), R. Sarrias-Mena(2), P. Horrillo-Quintero(1), F. Llorens-Iborra(1), I. De la Cruz- Loredo(3), C. E. Ugalde-Loo(3), L. M. Fernández-Ramírez (1) 1. Department of Electrical Engineering. Higher School of Engineering of Algeciras (ETSI Algeciras), University of Cádiz. Spain 2. Department of Engineering in Automation, Electronics, Computer Architecture & Networks. Higher School of Engineering of Algeciras (ETSI Algeciras), University of Cádiz. Spain 3. Centre for Integrated Renewable Energy Generation and Supply (CIREGS) School of Engineering, Cardiff University. United Kingdom Abstract Microgrid clusters (MGCs) have the ability toenhance energy efficiency, resilience, and reliability of individual microgrids (MGs). By integrating different power generation, consumption, and storage technologies, MGCs can combine direct current (DC) and alternating current (AC) technologies, thus offering flexibility to MGs. However, suitable control systems for MGCs are required to manage their operation, ensuring robustness and efficiency of the power dispatch...READ MORE 332-337
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Analysis of Phase Comparison Application in Power Transformer Protection Against Internal Faults J. Krstivojević(1), P. Eguia(2), M. Djuric(1), D.M. Larruskain(2), E.Torres(2) 1. Department of Power Systems. School of Electrical Engineering, University of Belgrade. Serbia 2. Department of Electrical Engineering. EIB University of the Basque Country (UPV/EHU) Spain Abstract This paper investigates the application of phase comparison between primary and secondary currents for detecting internal short circuits in power transformers. The directional index, derived from a digital phase comparator, is used as an indicator of the phase shift between these currents...READ MORE 338-342
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Modeling of DC asymmetrical faults in bipolar HVDC links with C. Wijnakker, J.L. Rodríguez-Amenedo, F. Arredondo, S. Arnaltes Departamento de Ingeniería Eléctrica. EPS, Universidad Carlos III de Madrid. Spain Abstract This work proposes a compact and flexible dynamicmodel of a bipolar HVDC link with metallic return, suitable for simulation of power systems. The model is formulated compactly using only two matrix equations and is capable of simulating different types of faults, including pole-to-ground, pole-to-neutral and pole-to-pole faults...READ MORE 343-348
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A Stochastic Methodology for PV System Allocation in Power Gustavo M. Espinoza, Ferdinando Crispino, Leandro Martins, Mauricio B. C. Salles, Carlos F. M. Almeida, Renato M. Monaro, Luís F. N. Lourenço, Luiz H. L. Rosa, Nelson Kagan, Juan C. Cebrian Department of Electrical Energy and Automation Engineering Polytechnic School. University of São Paulo. Brazil Abstract The increasing penetration rate of photovoltaicgeneration (PV) in distribution networks has led system operators to face several challenges such as overvoltage, voltage fluctuations, frequency fluctuations, and reverse power flow. This paper introduces a stochastic approach to determine the impact of Hosting Capacity (HC) on a real distribution network in terms of voltage profiles and power losses...READ MORE 349-353
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Assessment and thermal modeling of the impact of a floating photovoltaic system on lake temperature K. Sredenšek(1,2), D. Kuhar(1), J. Počivalnik(1), E. Simonič(1), G. Štumberger (2), S. Seme(1,2) 1. Faculty of Energy Technology, University of Maribor. Slovenia 2. Faculty of Electrical Engineering and Computer Science, University of Maribor. Slovenia Abstract This paper evaluates the impact of a floating photovoltaic system on lake temperature using a one-dimensional thermal model. The modeling approach incorporates established heat flux formulations and lake temperature dynamics, utilizing
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