161

On the portability of EMT models in different power

system simulation software tools

P. Pereda(1), P. Eguia(2), A. Laka(1)

1. Convergrid S.L. Parque Tecnológico de Zamudio. Spain

2. Department of Electrical Engineering, University of the Basque Country

(UPV/EHU), School of Engineering in Bilbao. Spain

Abstract

This paper presents the investigation carried out onthe portability and compatibility of a model in different simulation software. The offer of simulation software for power system simulation is wide, with each program having its own modelling interface and its own methods of model development.The lack of a widespread standard for portability between applications implies that the same organisation needs to carry out studies on different applications, requiring the development of a model of the same element or system for each application...READ MORE

162   

The impact of different PV system grid integration

approacheson voltage profile, grid losses and behaviour

of PV system owners

M. Pintarič, G. Štumberger

Faculty of Electrical Engineering and Computer Science. University of Maribor.

Slovenia

Abstract

Distribution grids in individual countries inside the European Union have different properties, while the grid operators use different approaches to integrate photovoltaic (PV) systems into the grid, which influences the voltage profile, grid losses and grid’s hosting capability. This work deals with a 0.4 kV distribution gird characteristic for the Slovenian countryside.
The grid users are relatively sparsely distributed in the space. The distances between them are relatively long, while the load distribution among individual phases is unbalanced...READ MORE

163

Educational Station for the Generation and Use of Green

Hydrogen

C. Capellán-Villacián, A. Falces, P.J. Zorzano-Santamaría,

E. Zorzano-Alba, M. Mendoza-Villena, P.M. Lara-Santillán,

E. Garcia-Garrido, L.A. Fernández-Jiménez

Department of Electrical Engineering. E.T.S.I.I., La Rioja University, Logroño. Spain

Abstract

Globally, electrical energy predominantly derives from fossil fuels such as coal, oil, and natural gas, which significantly emit greenhouse gases, thereby accelerating ecosystem degradation and climate change. In response, recent decades have witnessed a surge in the development of clean, sustainable electricity generation technologies such as wind and solar photovoltaic systems. These renewable sources are expected to replace fossil fuel-based methods but are limited by their dependency on variable weather conditions, which cannot align with electricity demand...READ MORE

164

Optimizing voltage references in a 3-leg power VSC under

single-phase-to-ground faults

A. Davila(1), U. Garcia(2), U. Gonzalez (2), J.X. Rementeria(2) , A. San

Andres(2), E.Planas(2)

1. Department of Electronics Technology

2. Department of Electrical Engineering, Bilbao School of Engineering – University of the

Basque Country (UPV/EHU), Spain

Abstract

Distribution grid deals with several challenges suchas the integration of the electrical vehicle, connection of renewable energy resources, management of storage systems, etc. These new factors can often produce some non-desirable effects in the grid such as electrical faults, which can damage the electricity supply quality. In order to improve the supply quality during electrical faults, power converters with specific control algorithms can be connected that modify the voltage on the loads connected to the grid during the duration of the fault...READ MORE

165

Volume Optimization for a Single-Phase Air-Core Reactor – 2D

Finite Element Method and Particle Swarm Optimization

Approach

Jeylto Alves de Souza Cruvinel, José Roberto Camacho

Alternative Energies and Electric Systems Protection Laboratory – LEAPSE, Faculty of

Electrical Engineering, Federal University of Uberlândia (UFU), Minas Gerais. Brazil

Abstract

This paper describes the optimization of an air core reactor using Particle Swarm Optimization (PSO) combined with the finite element analysis. The aim is to reduce material volume costs in manufacturing and maintenance. PSO is a nature-inspired optimization algorithm that simulates swarm behavior in search of the best solution in a multidimensional search space...READ MORE

166

Empirical Characterization of Non-Intentional Emissions

generated by PV Installations

G. Txertudi, U. Txertudi, M. Fernández, A. Gallarreta, J. González-Ramos,

D. de la Vega

Bilbao Engineering College, University of the Basque Country (UPV/EHU) Spain

Abstract

Non-Intentional Emissions (NIEs) generated bysolar photovoltaic (PV) systems have significantly increased concerns about disturbances in the 9-150 kHz band of the low-voltage distribution grid, which can lead to failures or cause thermal stress in the devices connected to the grid. Moreover, these emissions can cause interference in narrowband power line communications (NB-PLCs)...READ MORE

167

Evaluation of MCP Correlation Algorithms Applied to Wind

Data Series

A. Moreira(1), T. Rocha(2), J. Mendonça(3), R. Pilão(4), P. Pinto(1)

1. MEGAJOULE S.A. Maia. Portugal

2. INESC TEC, Centre for Power and Energy Systems Porto. Portuga

3. SIIS, Instituto Politécnico do Porto. Portugal

4. CIETI, ISEP, Instituto Politécnico do Porto. Portugal

Abstract

This work aimed to develop methodologies foranalysing statistical correlations among wind data series using various Measure-Correlate-Predict (MCP) methods, with the goal of selecting the most suitable method for extrapolating long-term data with minimal associated uncertainty. It was analysed the minimum time required for a wind measurement campaign when applying this methodology. Fifteen local wind measurement stations were selected...READ MORE

168

Influence of offshore wind turbine size in levelised cost energy

I. Arrambide

Escuela de Ingeniería de Guipúzcoa, University of the Basque Country

Department of Electrical Engineering. Spain

Abstract

Offshore wind energy is developing rapidly in recent years. Within the offshore wind energy industry, the main advance that has occurred has been the wind turbine growth. In fact, the offshore turbines have changed from small turbines adapted to the marine environment to turbines that currently range between 16~18 MW. This increase has been done in order to cut down costs and get longer production of wind energy, consequently, reducing the levelized cost of energy...READ MORE

169

LCL filter design and experimental response analysis for a SiC

inverter

S. Martín-Arroyo(1), A. Llamazares(1), J. Herrero Ciudad(2), M. García-

Gracia(1)

1. Department of Electrical Engineering. EINA, Zaragoza University. Spain

2. For Optimal Renewable Energy Systems, S.L. Zaragoza. Spain

Abstract

In this paper, an LCL filter for a 20-kW SiC powerinverter with a 25 kHz switching frequency is proposed and assessed. The transfer function without neglecting the network effect is considered. The optimal value of the damping resistor is evaluated to minimize losses while maintaining power quality and device stability. Finally, the harmonic content produced by the SiC inverter is experimentally measured to verify the effectiveness of the LCL filter...READ MORE

170

Validation of a methodology for post-construction Energy Yield

Assessment of an operational wind farm

M. Costa(1), T. Rocha(2), J. Mendonça(3), R. Pilão(4), P. Pinto(1)

1. MEGAJOULE S.A. Maia. Portugal

2. INESC TEC, Centre for Power and Energy Systems. Porto. Portugal

3. SIIS, Instituto Politécnico do Porto. Portugal

4. CIETI, ISEP Instituto Politécnico do Porto. Portugal

Abstract

The uncertainty associated with the prospective Energy Yield Assessment (EYA) of a wind farm may be reduced by re-estimating the energy yield after it enters normal operation. This study aims to validate a simple methodology for conducting post-construction EYA of an operational wind farm. The proposed methodology derives a linear relationship between a historical source of wind speed data and the observed wind farm production on a monthly basis...READ MORE

171

Educating Engineers on the Use of Renewable Ethanol Fuel as

a Drop-in Replacement for Gasoline in Small Engines

G. W. Davis, A. J. Mazzei

Department of Mechanical Engineering, Kettering University. USA

Abstract

The use of high-blend ethanol fuels to reduce emissions produced by on-road vehicles has been extensively studied. However, much less research has been done to study the effect of operating small off-road engines on high-blend ethanol fuel as a drop-in replacement for gasoline. Most small engine manufacturers only certify proper operation on low ethanol blends such as E10 (10% ethanol, 90% gasoline by volume)...READ MORE

172

Measurement of half-bridge parasitic impedances using a

flexible test probe

A. Llamazares, S. Martín-Arroyo, M. García-Gracia

Department of Electrical Engineering, EINA, Zaragoza University. Spain

Abstract

The use of SiC MOSFETs in power applicationsallows to increase power density and efficiency because switching frequencies are higher. However, parasitic impedances are responsible for oscillations that can have negative effects. In this paper we analyse the parasitic impedances of a half-bridge formed by a busbar PCB laminated with SiC MOSFETs. Using the distributed parameter approach, we have developed a procedure to characterize the impedance of the switching current loop responsible for the oscillations in the switching...READ MORE

173

Dynamic modelling and optimal operation of the photovoltaic/

thermal systems under various weather conditions

K. Sredenšek(1), E. Simonič(1), 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 aims to introduce a dynamic model for a photovoltaic/thermal system, highlighting an approach and synthesis of existing dynamic models to depict the full photovoltaic/thermal system. The model was validated using data from an experimental setup at the Institute of Energy Technology, Faculty of Energy Technology, University of Maribor, under different weather conditions...READ MORE

174

Design and Implementation of a Modified Cascaded Z-Source

High Step-Up Boost Converter for Photovoltaic (PV)

Applications

Navid Salehi, Guillermo Velasco-Quesada, Herminio Martínez-García

Electronic Engineering Department, Eastern Barcelona School of Engineering (EEBE)

Technical University of Catalonia – BarcelonaTech (UPC) Spain

Abstract

To improve the voltage gain of step-up converters, the cascaded technique is considered as a possible solution in this paper. By considering the concept of cascading two Zsource networks in a conventional boost converter, the proposed topology takes the advantages of both impedance source and cascaded converters. By applying some modifications, the proposed converter provides high voltage gain while the voltage stress of the switch and diodes is still low...READ MORE

175

The Integration of Renewable Energies and Energy Static

Converters Courses for Energy Engineering Students in the

Framework of the European Higher Education Area (EHEA)

Herminio Martínez-García

Eastern Barcelona School of Engineering (Escuela de Ingeniería de Barcelona Este –

EEBE) Department of Electronics Engineering, Technical University of Catalonia (UPC).

BarcelonaTech. Spain

Abstract

As it is well known, the Bologna Process is a voluntary intergovernmental European cooperation initiative that led to the creation of the named European Higher Education Area (EHEA). EHEA was formed to promote mobility, increase academic recognition and attract students and staff from around the world to Europe...READ MORE

176

On the Fitting of Three-Phase Voltage Curves with Ellipses

Using Geometric Algebra for Conics

Jorge Ventura(1), Jaroslav Hrdina(2), Ahmad Eid(3), Marek Stodola(2),

Francisco M. Arrabal-Campos(1), Alfredo Alcayde(1), Francisco G.

Montoya(1)

1. Department of Engineering - Universidad de Almeria. Spain

2. Institute of Mathematics, Faculty of Mechanical Engineering, Brno University

of Technology. Czech Repulic

3. Department of Electrical Engineering, Faculty of Engineering, Port-Said University. Egypt

Abstract

This work introduces a novel approach in power quality analysis by fitting three-phase voltage curves with ellipses using Geometric Algebra for Conics (GAC). Recognizing the limitations of current linear algebra-based methods, this paper highlights the need for further exploration into more effective techniques. Geometric Algebra offers a potent, efficient, and intuitive alternative for addressing power quality phenomena, such as sags, swells, and interruptions...READ MORE

177

Unfavourable scenario analysis of compensation mechanisms

for excess energy in self-consumption photovoltaic

installations in the Spanish residential sector

Sepúlveda, F., Miranda, M.T., Montero, I., Fernández, A., Larra, D.

Department of Mechanical, Energy and Materials Engineering

School of Industrial Engineering, University of Extremadura. Badajoz. Spain

Abstract

Self-consumption photovoltaic installations in the residential sector have great potential to mitigate the emissions associated with the current high consumption of fossil fuels. However, few studies analyse the technical and economic performance of these installations as a function of the electricity tariff contracted by the prosumer...READ MORE