IEEE CPE-POWERENG 2021 PROGRAM Hybrid Conference Florence, 14-16 July 2021

General Chair: Rosa Anna Mastromauro, Italy General Co-Chair: Luigi Piegari, Italy Honorary Chair: Mariusz Malinowski, Poland Honorary Co-Chair: Antonio Luque, Spain

Technical Program Chairs: Marco Liserre, João Martins, Portugal Dmitri Vinnikov, Estonia

Special Session Chairs: Radu Bojoi, Italy Tomilav Dragicevic, Enrique Romero Cadaval, Spain

Publication Chairs: Haitham Abu-Rub, Qatar Frede Blaabjerg, Denmark

With the patronage of:

General Information

The Conference will be held at the University of Florence Rettorato (Piazza San Marco, 4) and Auditorium di Sant’Apollonia (Via San Gallo, 25).

The Registration Desk will open at 08:15 am from July 14 to July 16.

The contributions will be presented orally by the authors (about 15 minutes for each paper) both onsite and in remote mode.

The working language of the conference, for presentations and discussions, will be English. Simultaneous translation will not be provided.

The Proceedings can be downloaded by the Conference platform.

Refreshment Information

Refreshment will be served each day at the time indicated in the program.

The Welcome Cocktail is scheduled on Wednesday, July 14 at “Alla Torre de’ Rossi”, “Hotel Pitti Palace al Ponte Vecchio” rooftop, Borgo San Jacopo, 3/r Florence.

The Gala Dinner is scheduled on Thursday, July 15 at “B-Roof Grand Hotel Baglioni”, Piazza Unità Italiana 6, Florence.

Anti-Covid Measures

In conformity to the Italian Covid containment measures the onsite participants must wear the mask in all the closed environments. The mask has to be worn outdoor where there is crowd risk. Participants are invited to respect social distance of 1m and to sanitize hands frequently. PROGRAM AT A GLANCE

July 14th 2021 - University of Florence Rettorato 9,00-9,20 Opening Ceremony 9,20-10,00 Keynote Speech 10,00-10,30 Coffee Break 10,30-12:00 Power Converters Applications and Control I 12,00-13,00 Power Generation, Transmission, Distribution and Monitoring I 13,00-14,30 Lunch 14,30-16,30 Renewable Energies 19,00 Welcome Cocktail Alla Torre de’ Rossi

July 15th 2021 - University of Florence Rettorato 9,00-9,40 Keynote Speech 9,40-11,00 Power Converters Applications and Control II 11,00-11,30 Coffee break 11,30-13,00 Power Converters Topologies and components 13,00-14,30 Lunch 14,30-16,30 Electric Mobility 20,00 Gala Dinner – B-Roof Grand Hotel Baglioni

July 16th 2021 - Auditorium Sant’Apollonia - Room A 9,00-10,30 SS Isolated Power Converters 10,30-11,00 Coffee break 11,00-12,30 SS Power Electronic Converters for DC Microgrids 12,30-14,00 Lunch 14,00-15,30 Power Converters Applications and Control III 15,30-16,30 Power Generation, Transmission, Distribution and Monitoring II 16,45-17,00 Closing remarks

July 16th 2021 - Auditorium Sant’Apollonia - Room B 9,00-10,30 Storage Technologies, EMI and EMC issues 10,30-11,00 Coffee break 11,00-12,15 Electrical Machines and Drives 12,30-14,00 Lunch 14,00-15,30 SS Energy Communities SS Technological and algorithmic innovations 15,30-16,45 for electric vehicles smartcharging Technical Program

Wednesday, July 14, 2021 Plenary Session, Aula Magna Rettorato, University of Florence (Piazza San Marco, 4) 09:00 – 09:20 Opening Ceremony 09:20 – 10:00 Keynote Speech: Prof. Frede Blaabjerg- Power Electronics Technology - Quo Vadis Chair Rosa Anna Mastromauro, Luigi Piegari 10:00 – 10:30 Coffee Break 10:30 – 12:00 Track Session: Power Converters Applications and Control I Chair: Kasper Paasch, Frede Blaabjerg

FF-001236 “Analysis and Suppression of Zero-Sequence Circulating Current in Multi-Parallel Converters”, Jun-Hyung Jung, Sante Pugliese, Marius Langwasser, Marco Liserre (Germany) FF-001031 “Understanding the Effects of Exponentially Decaying DC Currents on the Dual dq Control of Power Converters in Systems with High X/R”, Daniel dos Santos Mota, Elisabetta Tedeschi (, Italy) FF-000523 “Comparison Between PI and Neural Network Controller for Dual Active Bridge Converter”, Marco Bindi, Fabio Corti, Carlos Iturrino Garcia, Antonio Luchetta, Maria Cristina Piccirilli, Stefano Manetti, Francesco Grasso (Italy) FF-001791 “A Current Phase Controlled Sub-Synchronous Damper Converter for Liquefied Natural Gas Plants Applications”, Lorenzo Bongini, Rosa Anna Mastromauro, Daniele Sgrò, Fabrizio Malvaldi (Italy) FF-001821 “A Virtual Synchronous Machine-based Control for Eliminating DC-side Power Oscillations of Three-Phase VSCs under Unbalanced Grid ”, Eros Avdiaj, Jon Are Suul, Salvatore D’Arco, Luigi Piegari (Italy, Norway) FF-001465 “Feed-forward Compensator Design with countermeasures against the non-realizable modulation delay inversion for Current Control of PWM converters”, Rodrigo Guzman Iturra, Peter Thiemann (Germany) 12: 00 – 13:00 Track Session: Power Generation, Transmission, Distribution and Monitoring I Chair: Francesco Grasso, Angel Molina Garcia

FF-000825 “Hyperparameter Tuning of a Correntropy based ANN for Daily Electric Power Peak Load Forecasting by Modified Brain Storm Optimization”, Naoki Sato, Yoshikazu Fukuyama, Tetsuya Iizaka, Tetsuro Matsui (Japan) FF-001171 “The Control and Monitoring System on a Medium AC Distribution Grid: Device Implementation and Calibration Procedure”, Marco Dalle Feste, Massimiliano Chiandone, Daniele Bosich, Giorgio Sulligoi (Italy) FF-000361 “Using GIS to assess the impact of electric vehicles on electrical distribution networks: a study applied to the city of Brescia”, Giacomo Viganò, Daniele Clerici, Chiara Michelangeli, Diana Moneta, Alessandro Bosisio, Andrea Morotti, Bartolomeo Greco, Pasetti Caterina (Italy) FF-000817 “Development of a GIS-based model for the planning and operation of electrical distribution grids in rural areas: a case study in Peru, Matteo Moncecchi, Silvia Corigliano, Alessandro Bosisio, Lino Pruneri, Marco Merlo (Italy, Peru) 13:00 – 14:30 Lunch 14:30 – 16:30 Track Session: Renewable Energies Chairs: Alfonso Damiano, Giovanni Spagnuolo

FF-001953 “Data Analytics for Performance Modelling of Photovoltaic Systems in the Internet of Energy Scenario”, Clemente Capasso, Luigi Rubino, Guido Rubino, Ottorino Veneri (Italy) FF-000353 “Probabilistic capacity assessment for three-phase low-voltage distribution networks”, Amina Benzerga, Sébastien Mathieu, Alireza Bahmanyar, Damien Ernst (Belgium) FF-001708 “A Novel Approach for Distributed Maximum Power Point Tracking Using Modular Multilevel Converters”, Arash July, Davide De Simone, Luigi Piegari (Italy) FF-001732 “MMC-PV System with DC-Link Integrated Battery Energy Storage System”, Simone Barcellona, Marzio Barresi, Silvia Colnago, Luigi Piegari (Italy) FF-001805 “A Triple-Port Active Bridge DC-DC Converter for Integration of Energy Storage Systems in Concentrator Photovoltaic”, Mauro Boi, Andrea Salimbeni, Alfonso Damiano, Luigi Pio Di Noia, Renato Rizzo (Italy) FF-001538 “PV Solar Integration Analysis and Overview: an Energy Transition Case Study in the Dominican Republic”, Angel Molina-Garcia, Reyniel Ariel Feliciano, Ruben Dario Ramos (Spain, Dominican Republic) FF-001651 “Wind Turbine Generator Short Circuit Fault Detection Using a Hybrid Approach of Wavelet Transform and Naïve Bayes Classifier”, Hamid Toshani, Salman Abdi, Narges Khadem, Ehsan Abdi (, Iran) 19:00 Welcome Cocktail Alla Torre de’ Rossi – Borgo San Jacopo 3/r Thursday, July 15, 2021 Plenary Session, Aula Magna Rettorato, University of Florence (Piazza San Marco, 4) 09:00 – 09:40 Keynote Speech: Carlo Cecati Some Emerging Issues Related to Modern Power Converters Chair: Rosa Anna Mastromauro, Luigi Piegari 09:40 – 11:00 Special Session: Energy Communities Chairs: Marco Merlo, Matteo Moncecchi FF-000787 “Nearly Zero Energy Buildings, Home Flexibility and Electrical Vehicles Impact Over Energy Community Microgrid”, Joao Martins, Miguel Belchior, Rui Lopes (Portugal) FF-001139 “The first Italian Renewable Energy Community of Magliano Alpi”, Sergio Olivero, Emilio Ghiani, Gian Luca Rosetti (Italy) FF-001155 “Renewable Energy Communities in Valle d’Aosta Region: development perspectives”, Giampaolo Canestri, Eleonora Cerva, Francesco Demetrio Minuto, Andrea Lanzini, Matteo Moncecchi, Marco Merlo (Italy) FF-001325 “Heuristic Graph Partitioning with Preferred Cluster sizes and Application to the Generation of Realistic Distribution Grid Topologies”, Federico Rosato (Italy) FF-001856 “Brackish Desalination and Denitrification for Sustainable and Renewable Irrigation: Desirows Life European Project”, Angel Molina-Garcia, Cristina Martinez-Gonzalez, Joaquin Lopez-Castellanos, Juan Tomas Garcia, Francisco Vera- Garcia, Eloy Celdran-Uriarte (Spain) 11:00 – 11:30 Coffee Break 11:30 – 13:00 Special Session: Isolated Power Converters Chairs: Mattia Ricco, Riccardo Mandrioli

FF-000477 “Single Stage Wireless Power Transfer Battery Charger for Electric Vehicles”, Mattia Simonazzi, Alessandro Campanini, Leonardo Sandrolini, Claudio Rossi (Italy) FF-001309 “Multiwinding Leakage Inductance Optimization for Power Flow Decoupling in Multiport DC-DC Converters”, Hamzeh Beiranvand, Felix Hoffmann, Yoann Pascal, Frederik Hahn, Marco Liserre (Germany) FF-001597 “Three-phase CLLLC Resonant Converters”, Juan Ignacio Nunez, Andres Barrado, Antonio Lazaro, Pablo Zumel (Spain) FF-001058 “Power Losses comparison between Silicon Carbide and Silicon Devices for an Isolated DC-DC Converter”, Filippo Pellitteri, Alessandro Busacca, Carmelo Martorana, Rosario Miceli, Salvatore Stivala, Angelo Alberto Messina, Vincenzo Vinciguerra, Michele Calabretta (Italy) FF-001759 “Study of Back-end DC/DC Converter for 3.7 kW Wireless Charging System According to SAE J2954”, Guangyao Yu, Thiago Batista Soeiro, Jianning Dong, Pavol Bauer (The Netherlands) FF-001643 “Conducted Emission Analysis of a Near-Field Wireless Power Transfer System”, Mattia Simonazzi, Leonardo Sandrolini(Italy) 13:00 – 14:30 Lunch 14:30 – 16:30 Track Session: Electric Mobility Chairs: Alberto Reatti, Pietro Tricoli FF-000175 “Interleaved Wide-bandgap Semiconductor-Based Power Converters for Fuel Cell Powered Electric Vehicles”, Nuno Guerreiro, José Silva, Vitor Pires (Portugal) FF-000302 “Electric Vehicle Integrated Battery Charger for an AC Drive with Open Windings”, Victor Pires, Armando Cordeiro, Daniel Foito, Jose Fernando Silva (Portugal) FF-001635 “Control Strategies Analysis Used in Power Distribution Systems of Electric Vehicles with Multiple Energy Sources”, Victor Diaz, Andres Barrado, Antonio Lazaro, Cristina Fernandez (Spain) FF-000485 “Pareto Optimization of Planar Circular Coil for EV Wireless Charging”, Fabio Corti, Gabriele Maria Lozito, Antonino Laudani, Alberto Reatti, Maria Cristina Piccirilli, Luca Pugi (Italy) FF-000531 “Analysis of Power Losses due to Magnetic Shielding for Electric Vehicle Wireless Charging”, Marco Bindi, Giacomo Talluri, Antonio Luchetta, Francesco Grasso, Libero Paolucci, Leonardo Luchetti (Italy) FF-000345 “Energy saving in Battery Electric Vehicles equipped with Induction Machines and Modular Multilevel Converters”, Ivan Spina, Andrea Cervone (Italy) FF-000655 “A Mixed 1-phase and 3-phase Vehicle Charging System from AC Rail Traction Power Network”, Masood Hajian, Pietro Tricoli (United Kingdom) FF-000442 “Optimized Localization for the Inverting Substation to Maximize the Braking Efficiency of the DC Railways” Tamer Kamel, Zhongbei Tian, Mansoureh Zangiabadi, Neal Wade, Volker Pickert, Pietro Tricoli (United Kingdom)

20:00 Gala Dinner B- Roof Grand Hotel Baglioni Piazza dell’Unità Italiana, 6 Friday, July 16, 2021 Auditorium di Sant’Apollonia (Via San Gallo, 25) - Room A 09:00 – 10:30 Track Session: Power Converters Applications and Control II Chairs: Concettina Buccella, Joao Martins

FF-001007 “Control Strategy for Input-Parallel Output-Series Connected Inverter Systems”, Husheng Qian, Tianzhi Fang (China) FF-000205 “Operation and Control of Unified Power Quality Conditioner Enabled Meshed Hybrid Microgrid”, Hrishikesan V M, Devendra Kumar, Dwijasish Das, Chandan Kumar (India) FF-000647 “Dynamic Voltage Control Using Unified Power Quality Conditioner with Storage”, Hrishikesan V M, Devendra Kumar, Chandan Kumar (India) FF-000884 “Online Condition Monitoring of Electrolytic Capacitors in DC-DC Interleaved Boost Converters, Adopting a Model-Free Predictive Controller”, Khaled Laadjal, Fernando Bento, Imed Jlassi, Antonio J. Marques Cardoso (Portugal) FF-000744 “Effect of Pulses Distribution in a Buck Converter Controlled with Pulse Skipping Modulation”, Lorenzo Ciani, Marcantonio Catelani, Alessandro Bartolini, Fabio Corti, Giulia Guidi, Gabriele Patrizi, Alberto Reatti (Italy) FF-000248 “Comparative Study Between the ´Cuk and the LLC Converter in Photovoltaic Applications”, Md Nazmul Hasan, Timothy A.Polom () 10:30 – 11:00 Coffee Break 11:00 – 12:30 Track Session: Power Converters Topologies and Components Chairs: Andrii Chub, Enrique Romero Cadaval

FF-000191 “Multilevel Inverter with New Wide-Bandgap SiC and GaN Power Switches”, Rudolf Mecke (Germany) FF-000396 “Analysis of Components of the Heat Flow Path in Forced Cooling Systems”, Krzysztof Górecki, Krzysztof Posobkiewicz (Poland) FF-001074 “Assessment of the Switching Characteristics of a Commercial e-mode Power GaN Device Using a Dual Pulse Test Set-up”, Seyed Iman Hosseini Sabzevari, Salman Abdi Jalebi, Reza Ghazi (Iran, United Kingdom) FF-001198 “Passive Clamping Circuit for Reduced Switch Count in Solid State Circuit Breakers”, Luis Camurca, Jakob Jacobsen, Marco Liserre (Germany) FF-001384 “Study of Geometrical Effects on High Frequency Winding Loss of Air- Gapped Power Inductor Design with DC Current Impact”, Wai Keung Mo, Kasper M Paasch, Thomas Ebel (Denmark) FF-001686 “High Step-Down Diode-Capacitor-Inductor Cell Based DC-DC Converter”, Zahra Saadatizadeh, Pedram Chavoshipour Heris, Ebrahim Babaei, Frede Blaabjerg (Iran, USA, Turkey, Denmark) 12:30 – 14:00 Lunch 14:00 – 15:00 Track Session: Power Generation, Transmission, Distribution and Monitoring II Chair. Daniele Bosich, Jon Are Suul

FF-000256 “Operational Challenges to Accommodate High Penetration of Electric Vehicles: A Comparison between UK and China”, Chun Sing Lai, Dashen Chen, Xu Xu, Gareth Taylor, Ioana Pisica, Loi Lei Lai (United Kingdom, China, Singapore) FF-000086 “Sensitivity Analysis of Dominant Frequency of Transient Recovery Voltage using Stockwell Transform”, Rafael Arranz Padilla, Ángel Paredes Parrilla, Alejandro Rodríguez Gómez, Francisco Jesús Muñoz Gutiérrez (Spain) FF-000159 “Analysis of a Fast Reserve Unit Behaviour with Additional Modular Synthetic Inertia Control”, Antony Vasile, Vincenzo Di Dio, Rossano Musca, Giuseppe Sciumè, Gaetano Zizzo (Italy) FF-001619 “Use of Machine Learning Algorithms to Develop Grey-box Model Equivalents of Distribution Networks, Sirkka Porada, Carl Albrecht Becker, Albert Moser (Germany) 15:00 – 16:30 Track Session: Power Converters Applications and Control III Chair: Carlo Cecati, Dmitri Vinnikov

FF-001694 “Simple SHE formulation for Five-Level Cascaded H-Bridge Inverters”, Concettina Buccella, Maria Gabriella Cimoroni, Carlo Cecati (Italy) FF-000728 Title:”Single-Phase AC/AC Multilevel H-Bridge Transformerless Converter with SST Functionalities”, Bernardo Figueiredo de Andrade Campos, Renner Sartório Camargo, Emilio José Bueno Peña, Lucas Frizera Encarnação (Brazil, Spain) FF-000833 Title:”Asymmetric Single DC-Link Cascaded H-Bridge Multilevel Converter with Model Predictive Control”, Renner Sartório Camargo, Emilio José Bueno Peña, Lucas Frizera Encarnação (Brazil, Spain) FF-001023 “Control of Modular Multilevel Converter as Input Side of a Smart Transformer”, Begoña Montes Cabrera, Enrique Romero Cadaval, Selene Sánchez Cruz, M. Isabel Milanés Montero, Eva González Romera, Fermín Barrero González (Spain) FF-001872 “Performance Comparison of Cascade Control Systems for Single- Phase Grid-Forming Converters with LCL Filter”, Rosa Anna Mastromauro, Lorenzo Bongini, Francesco Antonio Gervasio (Italy, Spain) FF-001767 “Internal Model Control based Non-Interactive Feed-forward Compensator for Current Control of PWM Converters”, Rodrigo Guzman Iturra, Peter Thiemann (Germany) 16:45 – 17:00 Closing Remarks Friday, July 16, 2021 Auditorium di Sant’Apollonia (Via San Gallo, 25) - Room B 09:00 – 10:30 Track Session: Storage Technologies, EMI and EMC Issues Chair: Gabriele Grandi, Flavia Grassi

FF-000019 “Impact of Cell to Cell Variances on the Current Distribution among Two Parallel Lithium-Ion Cells at constant Current Conditions”, Alexander Fill, Daniel Müller, Tobias Mader, Arber Avdyi, Tobias Schmidt, Kai Peter Birke (Germany) FF-001228 “Influence of the Cell Topology, Thermal Conditions and initial Cell to Cell Variances on Aging Gradients among Lithium-Ion Cells of a Battery”, Alexander Fill, Daniel Müller, Kai Peter Birke (Germany) FF-001813 “A Hybrid Storage Systems for All Electric Aircrafts”, Giuseppe Bossi, Nicola Campagna, Vincenzo Castiglia, Alfonso Damiano, Rosario Miceli, Antonino Oscar Di Tommaso (Italy) FF-000337 “Design of Bypass Network for Fast Switching Inverters Using an Innovative Hybrid DC-Link”, Jasper Schnack, Jan-Philipp Goerdes, Stefan Stahl, Hans- Peter Tiedemann, Ulf Schuemann, Regine Mallwitz (Germany) FF-001317 “EMI Filter Re-Design in a SMPS with Inductor in Saturation”, Daniele Scirè, Giuseppe Lullo, Gianpaolo Vitale (Italy) FF-001627 “Conducted Emissions Measurements in DC Grids: Issues in Applying Existing LISN Topologies and Possible Solutions”, Arun Khilnani, Lu Wan, Mark Sumner, David Thomas, Abduselam Hamid, Flavia Grassi (United Kingdom, Italy) 10:30 – 11:00 Coffee Break 11:00 – 12:30 Track Session: Electrical Machines and Drives Chairs: Filippo Pellitteri, Pietro Tricoli

FF-001961 “Thermal Investigations of Air-Cooled PMSM used in Full-Electric UAV”, Andrea Del Pizzo, Mario Boi, Alfonso Damiano, Luigi Pio Di Noia, Renato Rizzo (Italy) FF-001163 “Currents and Torque Oscillations Mitigation in High Power Induction Motor Drives”, Krishneel Kumar, Mario Marchesoni, Zeno Maule, Massimiliano Passalacqua, Francesco Soso, Luis Vaccaro (Italy) FF-000213 “Torque Comparison of Surface Mount and Interior Permanent Magnet Synchronous Motor for Railway Applications” Nursaid Polater, Tamer Kamel, Pietro Tricoli (United Kingdom) FF-001864 “Comparison between 3-ph and 6-ph PMSM solutions for the electric propulsion of unmanned aerial vehicles”, Andrea Del Pizzo, Luigi Pio Di Noia, Antonino Oscar Di Tommaso, Rosario Miceli, Renato Rizzo (Italy) FF-000221 “Converters to drive two brushed DC machines”, Felix Himmelstoss, Helmut Votzi (Austria) 12:30 – 14:00 Lunch 14:00 - 15:30 Special Session: Power Electronic Converters for DC Microgrids Chairs: Andrii Chub, Victor Pires

FF-000132 “DC-link Capacitor Minimization in Residential Energy Router Through Battery Utilization”, Mahdieh Najafzadeh, Oleksandr Husev, Indrek Roasto, Dmitri Vinnikov, Tanel Jalakas (Estonia) FF-000272 “A DC-DC Converter for Bipolar DC Microgrids with Voltage Balance Capability to Supply a Multilevel SRM Drive”, Victor Pires, Daniel Foito, Armando Pires, Armando Cordeiro, João Martins (Portugal) FF-000965 “A New Coupled-Inductor-Based Buck/Boost DC/DC Converter with Soft Switching for DC Microgrid Applications”, Hamed Mashinchi Maheri, Pedram Chavoshipour Heris, Zahra Saadatizadeh, Ebrahim Babaei, Dmitri Vinnikov (Estonia, Iran,Turkey) FF-001295 “Photovoltaic Microconverter with Integrated Sub-Modular Power Optimizer”, Hamed Mashinchi Maheri, Andrii Chub, Dmitri Vinnikov, Andrei Blinov (Estonia) FF-001899 “Accelerated Global MPPT for Multimode Series Resonant DC-DC Converter”, Vadim Sidorov, Andrii Chub, Dmitri Vinnikov (Estonia) FF-001902 “Effect of Mission Profile Resolution on Photovoltaic Energy Yield Prediction in Python and MATLAB, Abualkasim Bakeer, Andrii Chub, Dmitri Vinnikov, Frede Blaabjerg (Estonia, Denmark) 15:30 – 16:45 Special Session: Technological and Algorithmic Innovations for Electric Vehicles Smartcharging Chairs: Mattia Ricco, Renato Rizzo

FF-000779 “State of Charge Optimization-Based Smart Charging of Aggregate Electric Vehicles from Distributed Renewable Energy Sources”, Francesco Lo Franco, Mattia Ricco, Riccardo Mandrioli, Rudolf F. P. Paternost, Gabriele Grandi (Italy) FF-001201 “Smart Charging Algorithm for Flexibility Provision with Electric Vehicle Fleets”, Matteo Moncecchi, Giuliano Rancilio, Aleksandar Dimovski, Filippo Bovera (Italy) FF-001481 “Day-Ahead Multistage Stochastic Optimization of a Group of Electric Vehicle Charging Stations”, Camilo Orozco, Alberto Borghetti, Fabio Napolitano, Fabio Tossani (Italy) FF-000698 “A Two-Layer Model for Optimal Charging Scheduling of Electric Vehicle Parking Lots in Distribution Network”, Mahnaz Moradijoz, Jaafar Heidari, Ehsan Heydarian-Forushani, Seifeddine Ben Elghali (Iran, France) FF-000809 “The impact of charging electric vehicles in electrical public substations”, P.J. Santos, A.J. Pires, Rui Castro (Portugal) Organizing Secretariat