Authors

Publications

RES and energy storage: new opportunities for emerging markets20171003090037

RES and energy storage: new opportunities for emerging markets

3 October 2017
Luigi Lanuzza, EGP – Gabriella Preite, EPS – Margherita Moreno, ENEA – Miguel Cipolla Ficarra, CESI - Ubaldo Bigossi, Convert - Marco Merlo, Politecnico di Milano – Barbara Rossi, SAETRes4Africa Fostering the deployment of Renewable Energy in Ethiopia: a Sustainable Roadmap // October 3rd - 4th, 2017Renewable Energy Sources (RES) are a fast and reliable way for providing energy for countries under fast development, and represent a competitive and economically sustainable solution when in presence of abundant natural resource, which is typically the case of such countries. On the other...
Assessing the impact of a two-layer predictive dispatch algorithm on design and operation of off-grid hybrid microgrids’20190511143900

Assessing the impact of a two-layer predictive dispatch algorithm on design and operation of off-grid hybrid microgrids’

11 May 2019
L. Moretti, S. Polimeni, L. Meraldi, P. Raboni, S. Leva, and G. ManzoliniRenew. EnergyThe high uncertainty associated with renewable power production limits renewable energy penetration in off-grid systems. Advanced control strategies allow for a more effective exploitation of nondispatchable sources. This paper presents a two-layer predictive management strategy for an off-grid hybrid microgrid featuring controllable and non-controllable generation units and a storage system. The upper layer deals with the unit commitment, while the second layer regulates real-time operation, applying a respo...
Numerical and experimental testing of predictive EMS algorithms for PV-BESS residential microgrid20190627123554

Numerical and experimental testing of predictive EMS algorithms for PV-BESS residential microgrid

27 June 2019
S. Polimeni, L. Moretti, G. Manzolini, S. Leva, L. Meraldi, P. RaboniPowerTech, 2019 IEEE MilanThis paper presents the Multi-Good MicroGrid (MGMG) experimental facility that has been built at the Department of Energy of Politecnico di Milano to test and develop new innovative predictive optimization Energy Management System (EMS) for MGMG operation. After an introduction on the current literature status about EMS and microgrid (MG) test facilities, this work describes in detail this new experimental setup. The MGMG integrates different goods, generators, renewable energy sources, various types...
Ground Fault Analysis in a Microgrid Scenario20190627125031

Ground Fault Analysis in a Microgrid Scenario

27 June 2019
A. Dolara, E. Ogliari , P. RaboniPowerTech, 2019 IEEE MilanMicrogrids are based on the same grounding schemes generally adopted in the low voltage radial distribution grids. Unlike traditional distribution grids, in islanded microgrids the neutral grounding becomes a complex problem due to different operating configurations. All the electrical devices connected to the microgrid must be modeled to guarantee the access to the neutral point and their models have to be easy to include in the whole microgrid model. The Voltage Behind Reactance model is here introduced to meet these requirements in ...
Analyses of electrification and battery ageing processes in a real offgrid hybrid microgrid20190627143537

Analyses of electrification and battery ageing processes in a real offgrid hybrid microgrid

27 June 2019
O. Rigovacca, P. Raboni, S. Polimeni, G. Manzolini, S. LevaPowerTech, 2019 IEEE MilanThis paper aims to present an analysis performed on real operation data of an islanded microgrid, located in Somalia. The study is carried out from the first months of deployment, in November 2015, up to October 2018, emphasizing relevant events occurred and the effects on the overall system. The investigation focuses on load demand increase, induced by the electrification of the area, and consequent installation of new generators. Moreover, real data about lead-acid battery ageing are presented, with the impl...
Decentralized renewable energy solutions to foster economic development20171003090024

Decentralized renewable energy solutions to foster economic development

3 October 2017
Giuseppe Artizzu, EPS - Ilaria Rosso, EPS - Anna Paola Minervini, EGP - Edoardo Patriarca, EGP – Emi Bertoli, EGP - Antonio Bonanni, Enertronica - Giovanni Pediconi, Enertronica - Tunde Morakinyo, ERM - Rachel Cochran, ERM - Alberto Berizzi, Politecnico di MilanoRes4Africa Fostering the deployment of Renewable Energy in Ethiopia: a Sustainable Roadmap // October 3rd - 4th, 2017Electricity supply and socio-economic development are closely linked. Innovative, sustainable decentralized energy solutions represent indeed the most efficient instrument to promote electricity access in remote and l...
Photovoltaic Inverter control method for operating an hybrid PV and genset microgrid without interphering with genset controller20170701234838

Photovoltaic Inverter control method for operating an hybrid PV and genset microgrid without interphering with genset controller

1 July 2017
P. Raboni, D. Martinifiled 2015 // 1 July 2017A hybrid power system (1 ) is disclosed. The system comprises a plurality of dispatchable power resources (7.i; 7.j) and a first controller (12) for controlling the dispatchable power resources. The system further comprises a power resource section (5) responsive to environment conditions and a second controller (17) for controlling the power resource* section (5) responsive to environment conditions. The second controller (17) is configured and arranged for measuring a total power (∑Pgenset) generated by the plurality of dispatchable power reso...
Hybrid DCAC converter Control for Inrush Current Protection20170629085907

Hybrid DCAC converter Control for Inrush Current Protection

29 June 2017
S. Mastelone, S. Almer, D. Martini, P. Rabonifiled 2016 // 29 June 2017DC/AC converter comprising a new control device and method for managing inrush current transients during operation without requiring additional external devices or emergency operating modes forcing the DC/AC converter to shut down. The present invention is particularly, but not exclusively, aimed at grid connected DC/AC, converters, often subject to inrush current phenomena due to perturbations in the grid.READ MORE    ...
Energy transition technology roadmap. Distinguishing hype from reality – 2020 strategic technological plan and business targets20170523091406

Energy transition technology roadmap. Distinguishing hype from reality – 2020 strategic technological plan and business targets

23 May 2017
Daniele Rosati, Pietro Raboni, Carlalberto GuglielminottiWhite paper // 23 may 2017Climate change and global warming in particular may be a controversial scientific theory, particularly in the US, but its growing impact on business is undeniable. The energy generation landscape, to begin with, is being disrupted by the growth of renewables; transport is witnessing the affirmation of the electric car, in its pure form or as a hybrid, and, most pervasive of all, the search for energy efficiency is creating new businesses – think for example smart metering or behind-the-meter distributed genera...
Optimization Models for Islanded Micro-Grids: A Comparative Analysis between Linear Programming and Mixed Integer Programming20170216091625

Optimization Models for Islanded Micro-Grids: A Comparative Analysis between Linear Programming and Mixed Integer Programming

16 February 2017
Alberto Dolara, Francesco Grimaccia, Giulia Magistrati, Gabriele MarchegianiEnergies 2017, 10(2), 241 // 16 February 2017"This paper presents a comparison of optimization methods applied to islanded micro-grids including renewable energy sources, diesel generators and battery energy storage systems. In particular, a comparative analysis between an optimization model based on linear programming and a model based on mixed integer programming has been carried out. The general formulation of these models has been presented and applied to a real case study micro-grid installed in Somalia. The case ...
Performance Analysis of a hybrid micro-grid in Somalia20170101092206

Performance Analysis of a hybrid micro-grid in Somalia

1 January 2017
Alberto Dolara, Elisa Donadoni, Sonia Leva, Giulia Magistrati, Gabriele MarchegianiIEEE PES PowerTech 2017 // 2017This paper presents a data analysis of an islanded diesel-PV-battery system, placed in Somalia. Operation of each generator is observed, concerning the most relevant performance indicators. Analysis is carried out during the first 11 months of operation, from November 2015 to September 2016. Investigations are divided into two periods, according to a significant load variation due to the connection of a new distribution line to the power plant. Thus, a comparison on load demand sha...
Distributed storage for provision of ancillary services to the main grid: project PRESTO20161101092529

Distributed storage for provision of ancillary services to the main grid: project PRESTO

1 November 2016
S. Nassuato, G. Magistrati, G. Marchegiani, D. Falabretti, M. Delfanti, M. MerloEnergy Procedia, vol. 99, pp. 182-193 // November 2016This paper presents the three-year PRESTO research project (2013-2015). PRESTO is a self-funded project developed by the Department of Energy of Politecnico di Milano in cooperation with FIAMM Storage, Elvi Energy and MCM Energy Lab (an Italian spin-off). Within the project, experimental tests and numerical simulations were performed in order to evaluate the effectiveness of an Energy Storage System (ESS) in the provision of ancillary services to the main grid. ...
Design of reactive power regulator of synchronous generators by considering grid impedance angle for characteristic index objectives20161027092735

Design of reactive power regulator of synchronous generators by considering grid impedance angle for characteristic index objectives

27 October 2016
P. Raboni, S. Chaudhary, and Z. ChenDesign of reactive power regulator of synchronous generators by considering grid impedance angle for characteristic index objectives // 27 October 2016Effects of low reactance to resistance ratio in distribution networks are widely studied but little work dealing with the tuning of voltage and reactive power regulators of small synchronous generators has been reported. This study endeavours the design of a proportional integral controller for the reactive power regulator to fulfil the characteristic index (CI) objectives, which are based on the step-response...
Optimal Management Algorithm for Battery Energy Storage System Included in an Islanded Micro-Grid20160607093630

Optimal Management Algorithm for Battery Energy Storage System Included in an Islanded Micro-Grid

7 June 2016
Alberto Dolara, Giulia Magistrati, Francesco Grimaccia and Gabriele Marchegiani16th International Conference on Environment and Electrical Engineering (EEEIC) // 7-10 June 2016This work proposes an optimization method for the management of a Battery Energy Storage System (BESS) integrated in an islanded Micro-Grid, including Renewable Energy Systems (RESs) and generators burning fossil fuels. The optimized control of the battery State of Charge (SOC) allows to get the BESS available as much as possible to support the RES power production, hence minimizing the use of fossil fuels. The optimizat...
Modelling, Control and Integration of Distributed Generators for Enhanced Ancillary Services20160131094259

Modelling, Control and Integration of Distributed Generators for Enhanced Ancillary Services

31 January 2016
P. RaboniPhD Thesis, Department of Energy Technology, Aalborg University, Aalborg Universitetsforlag, 2016 // 31 January 2016The increasing share of Distributed Generators (DGs) poses concerns about network stability and their fair participation to the electricity market. Their aggregation in Virtual Power Plants, sometimes in combination with load prosumers, could represent an answer to these issues. Nevertheless Technical Virtual Power Plant still offer limited ancillary services, as reactive power management and spinning reserve. Focus of this thesis is on the control of DGs for providing f...
Control loops design in a grid supporting mode inverter connected to a microgrid20150908094535

Control loops design in a grid supporting mode inverter connected to a microgrid

8 September 2015
Giovanni M. Foglia, Luisa Frosio, Matteo F. Iacchetti, Roberto Perini2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe) // 8-10 September 2015This paper deals with some design aspects of the control loops in a droop-controlled VSI connected to other inverters of greater ratings or to a strong grid, which sets the frequency. The design of a damping resistor in series with the AC filter capacitor is discussed and the impact of strong feedback between the output current and the capacitor voltage is investigated. Moreover, an analysis of the derivative droop c...
Hybrid micro-grid experimental application in Tanzania20150616094750

Hybrid micro-grid experimental application in Tanzania

16 June 2015
M. S. Carmeli, M. Mauri, C. Brivio, P. Guidetti, S. Mandelli, M. Merlo, R. Perini, G. Marchegiani, D. Rosati2015 International Conference on Clean Electrical Power (ICCEP) // 16-18 June 2015This paper is intended to introduce the project Energy4Growing that aims at studying and setting up a hybrid micro-grid to supply power to a school in rural Tanzania. It describes the results of the early project actions which concerned in: (i) analysing the actual school power supply system through locally metered data; (ii) developing the first step of a new electro-mechanical model which addresses the si...
Electricity tariff reform – Discourages energy efficiency20150201094945

Electricity tariff reform – Discourages energy efficiency

1 February 2015
Giuseppe Artizzuwww.qualenergia.it // february 2015The solution suggested by the authority to resolve problems is to penalise and shift part of the financial burden on to those who produce renewable energy power, which seems to be contrary to what the legislations state. Here follows Giuseppe Artizzu’s opinion on the proposal for reform of the electricity rates of residential customers. Having summarized the proposed reform of the electricity rates for residential customers deeply discussed by the energy authority, we will host a debate about it on the following pages. We have published the ...
Technical Strategies for Voltage Power Regulation in LV Distribution Networks20150101095408

Technical Strategies for Voltage Power Regulation in LV Distribution Networks

1 January 2015
M. Delfanti, L. Frosio, G. Monfredini, M. Merlo, C. Rosati, D. Rosati, G. MarchegianiDistributed Generation and Alternative Energy Journal, vol. 30, no.4, pp. 7-14 // 1 January 2015We report the integration of a novel voltage regulation strategy in the inverter control algorithm for Dispersed Generation (DG) applications. The adoption of a decentralized voltage control based on local curves allows the voltage profile to be controlled at the Point of Common Coupling (PCC) of the generators and, therefore, the capacity of existing distribution networks to host more generation from renewables. Th...
Opec had no choice20150101095210

Opec had no choice

1 January 2015
Giuseppe Artizzuwww.huffingtonpost.it // january 2015The long-awaited Opec Summit in Vienna on thursday ended with nothing concrete: cartel production in 2015 will remain the current one, despite the collapse of more than 30% of barrel price since this summer. Who has interpreted the decision as a deliberate choice by the Saudis to make a price war on American producers is wrong. Opec had no choice, the financial perspectives are grave for weaker members of the cartel, such as Venezuela and Nigeria, in a context of low oil prices. What determines the excess supply on the international oil mark...
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