297

A Dynamic Balance: Leveraging HVDC and the Kuramoto

Method in Power Grid Stability

Á. Weidinger, B. Hartmann, I. Vokony

Department of Electric Power Engineering. Budapest University of

Technology and Economics. Budapest. Hungary

Abstract

Power grid stability has become an increasinglyintricate challenge with the rising integration of renewable energy sources like wind and solar power. These energy sources, while essential for achieving sustainability goals, introduce significant variability and reduce the system’s inertia due to the displacement of conventional synchronous generators. This paper explores the combined role of High-Voltage Direct Current (HVDC) systems and the Kuramoto model in addressing these challenges. The Kuramoto model, traditionally used to study synchronization phenomena, is adapted to represent power system dynamics, enabling simulation of grid stability under diverse conditions...READ MORE

311

68-72

Smart devices based on nanostructures according

to adapt turbojets to work with renewable energy

J. Alan Calderón Ch.(1,2), Benjamín Barriga Gamarra(2),

Julio C. Tafur Sotelo(2), Ricardo A. Alvarez L. (2)

1. Applied Nanophysics, Institute for Physics, Technical University

of Ilmenau. Germany

2. Control Engineering and Automation Master Program, Mechatronic

Engineering Master Program, Engineering. Department,

Pontificia Universidad Católica del Perú

Abstract

It is proposed in the following article the analysis of the correlation between nanostructure devices with the engagement of turbojets, as well as to know how this improvement can get effect over the usability of new kind of fuel for the turbojet. It means that it will be shared and explained in this research: What consequences happen inside a turbojet when it is evaluated its performance by a new kind of fuel based on hydro-diesel? Most of the expected results are given by not controlled variables, such as vibrations considered like big disturbances for the turbojet operation ... READ MORE

345

73-78

Energy Audit and Characterization of Special Technical

Installations –Case Study – Municipal Civil Protection

House and Coimbra Fire Brigade Headquarters

Daniel O. Gonçalves(1), R. M. Monteiro Pereira(1,2,3),

Adelino J. C. 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

Climate change poses a growing threat withconsequences for various areas of society. In Portugal, around 30% of final energy is consumed by the building sector, while in Europe, this figure is approximately 40%. The building of the Municipal Civil Protection House and the Fire Brigade Headquarters in Coimbra is a public service building, constructed about 25 years ago, prior to the implementation of the Energy Certification System for Buildings (SCE) in Portugal, so its construction and technical systems are outdated compared to current regulatory requirements. As a building with unique operating conditions, hosting both the Fire Brigade services and Civil Protection services, both of which are highly relevant to the Municipality of Coimbra, it is necessary to ensure the proper functioning of special technical installations...READ MORE

358

79-84

Analysis of Power Quality in Photovoltaic Solar Microgeneration

Systems - A Case Study from Uruguay

A. M. T. Gallero(1), E. A. Vieira(1), E. G. L. Maniçoba(1,2)

1. Department of Environmental Sustainably. UTEC – Technological University

South Central Technological Institute – Durazno. Uruguay

2. Postgraduate Programme in Electrical Energy.UFRN – Federal University

of Rio Grande do Norte. Brazil

Abstract

Photovoltaic microgeneration is a key opportunity to diversify the energy matrix, enhance electricity supply sustainability, and contribute to renewable energy. However, its grid integration can cause power quality issues, such as voltage fluctuations, low power factor, and harmonic distortion. This study compares power quality in On-Grid, Off-Grid, and Hybrid photovoltaic systems under different load conditions in single-phase configurations. Experimental measurements were conducted on a photovoltaic system at the Technological University of Uruguay (ITRCS) using a network analyzer to assess power factor and total harmonic distortion ...READ MORE

388

85-90

No Structure Query Language database for digital twin

support of wind turbine farms

F. Herrera(1), S. Esteban(2), M. Santos(3)

1. Computer Science Faculty. Universidad Complutense de Madrid. Spain

2. Dept. Arquitectura de Computadores y Automática. Faculty of Physics.

Universidad Complutense de Madrid. Spain

3. Institute of Knowledge Technology. Universidad Complutense de Madrid. Spain

Abstract

Offshore wind turbines are emerging as a key technology to provide energy through a still not fully exploited natural resource such as the ocean winds. However, offshore wind turbines present more challenges than their onshore counterpart due to their location in a more unstable environment. A technology that helps to improve the control and monitoring of these turbines is a digital twin. The aim of this work is to design a database able to represent and manage the digital twins of wind turbines farms...READ MORE

91-96

399

Validation of flexible demand models and strategies in

smart grids for small and medium prosumers

R. Rengel(1), J. Caparrós(1), D. Tejada(1), E. López(1), A. Álvarez(2)

1. Instituto Nacional de Técnica Aeroespacial (National Institute for Aerospace

Technology) Huelva. Spain

2. Instituto Tecnológico de Galicia | Centro Tecnológico Nacional. A Coruña. Spain

Abstract

Renewable energies have recently demonstrated their ability reducing the dependence on fossil fuels, contributing to the resilience of energy supply and playing an important role in reducing greenhouse gas emissions. This increasing use of renewable energy sources has led to the proliferation of prosumer microgrids, where users take on a dual role, both consumers of the self-generated electricity from renewables and producers of the system power. This distributed model of energy generation and consumption allows users not only to generate and consume electricity, but also to share it with others, encouraging greater participation in the energy system...READ MORE

403

97-100

Superconductivity in the Electric Power System

Alfredo Álvarez, Pilar Suárez, Belén Rivera, Belén Pérez

Lab. “Benito Mahedero” of Electrical Applications of Superconductors

Department of Electrical Engineering, University of Extremadura

Superconductivity is a state of certain materials inwhich they lose resistivity (they become perfect conductors) and expel any magnetic field from within (they become perfect diamagnetic). Both properties make superconductors an ideal candidate for use in electrical applications, despite the drawback that the superconducting state only appears when its temperature drops below a certain critical temperature. which, in the best case, is not higher than 77K (−196°C)... READ MORE

405

101-106

Hydrodynamic Analysis of Modelling Approaches

of Oscillating Water Columns Integrated in a

Barge-based Floating Offshore Wind Turbine

F. Mzoughi(1,2), C. Crawford(1), A. Garrido(2), I. Garrido(2)

1. Sustainable Systems Design Lab–SSDL, Institute for Integrated Energy

Systems–IESVic, Department of Mechanical Engineering, Faculty of Engineering

and Computer Science, University of Victoria–UVic. Canada

2. Automatic Control Group–ACG, Institute of Research and Development of

Processes–IIDP, Department of Automatic Control and Systems Engineering,

Faculty of Engineering of Bilbao–EIB/BIE, University of the Basque Country–

UPV/EHU. Spain

Abstract

The integration of Oscillating Water Columns(OWCs) into Floating Offshore Wind Turbines (FOWTs) offers a promising hybrid renewable energy solution. Accurately modeling the hydrodynamic response of these systems is essential for performance assessment and design optimization. This study compares two numerical models, i.e. standard ITI Energy barge and the same one with four integrated OWCs. Using WAMIT, the hydrodynamic analysis of both platforms was carried out including the added masses, damping coefficients, and Response Amplitude Operators (RAOs)...READ MORE

 437

A Mixed-Integer Programming Framework for Economic

and Environmental EV Fleet Charging

M. F. Almeida, F. J. Soares, F.T. Oliveira

INESCTEC, CPES. Porto, Portugal

Abstract

Widespread fleet electrification is concentrating electricity demand at commercial depots that face volatile prices, tight feeder limits and scarce chargers. This paper proposes a forecast‑aware mixed‑integer linear program (MILP) that co‑optimises vehicle charging, battery‑energy‑storage dispatch and photovoltaic self‑consumption. The model minimises energy cost plus state‑of‑charge (SOC) penalties, while enforcing charger exclusivity, battery‑health bounds and continuous priority weights. It is evaluated on a 48‑interval weekday data set comprising 20 electric vehicles, two 11 kW chargers, half‑hourly solar forecasts, factory‑load predictions and Iberian day‑ahead prices...READ MORE

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