G. Graditi

G. Graditi
ENEA | ENEA · Energy Technologies and Renewable Sources Department

Electrical Engineering

About

298
Publications
75,986
Reads
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4,364
Citations
Additional affiliations
September 2000 - July 2015
ENEA
Position
  • Head of Photovoltaic Technologies Unit

Publications

Publications (298)
Patent
La presente invenzione ha come oggetto un rivestimento assorbitore spettralmente selettivo per tubi ricevitori operanti in aria di impianti solari termici e termodinamici per la produzione di energia termica e/o elettrica, con speciale riferimento agli impianti solari termici e termodinamici a concentrazione a collettori lineari parabolici o Fresne...
Chapter
The challenges behind the transition from a traditional electric grid to a smart grid are intrinsically clarified by its definition: a smart grid is an electricity network that can efficiently integrate the behavior and actions of all users connected to it – generators, consumers, and prosumers – in order to ensure an economically efficient, sustai...
Chapter
Addressing climate change is one of the most important drivers for national energy policies worldwide by defining the urgent need to decarbonize energy systems through mitigating their environmental impacts. The needed energy transition brings many challenges and opportunities, and a significant progress is necessary so that today's energy systems...
Chapter
In this chapter, the authors address the role of local energy communities (LEC) in the transition toward a low‐ or even carbon‐neutral energy system. LECs are contextualized in the broader framework of the energy revolution started after Paris Agreements in December 2015 that led to the definition of 17 “sustainable development goals (SDGs)” by Uni...
Article
Full-text available
The integration of renewable energy sources into the energy system requires both new investment in network infrastructures, and the introduction of new models of energy management. In this framework, new structures of collaborations were born: the aggregator is one of them. It involves grouping different players of the power system, acting, however...
Article
Full-text available
Electrical load forecasting has a fundamental role in the decision-making process of energy system operators. When many users are connected to the grid, high-performance forecasting models are required, posing several problems associated with the availability of historical energy consumption data for each end-user and training, deploying and mainta...
Chapter
This book addresses the topic of integrated energy systems and networks by also providing a comprehensive overview of the emerging technologies and systems that characterize this new energy paradigm. It discusses the energy transition toward a low‐ or even carbon‐neutral energy system, which brings many challenges and opportunities, and the signifi...
Book
In Technologies for Integrated Energy Systems and Networks, a team of distinguished authors delivers a detailed discussion of integrated energy systems and networks, including a comprehensive overview of emerging technologies. The book focuses on the technologies and systems that play a major role in integrated energy systems, like renewable and di...
Chapter
Although distributed energy resources (DER) are growing fast, to achieve their expected benefits in the context of local energy systems, it is essential to determine the system configurations in a rational way by selecting the most appropriate energy technologies and the corresponding operation strategies, while taking into account both cost and en...
Article
The optimisation of the support structure of heliostats in concentrating solar power plants is a fundamental task aimed at attempting to reduce the high levelised cost of energy (LCOE) of current configurations. In this work, an integrated multi-objective optimisation framework is presented, which relies on the combination of a lean and fast struct...
Article
Full-text available
Through the integration of multiple energy carriers with related technologies, multi-energy systems (MES) can exploit the synergies coming from their interplay for several benefits towards decarbonization. In such a context, inclusion of Power-to-X technologies in periods of excess renewable electricity supply, removes the need for curtailment of r...
Technical Report
Full-text available
The PV penetration in many countries is continuously growing and PV is becoming a major energy source in the future electricity grid worldwide. Therefore, PV systems and PV hybrids need to take over more and more system responsibility by providing ancillary services. Ancillary service “means a service necessary for the operation of a transmission o...
Conference Paper
Full-text available
The PV penetration in many countries is continuously growing and PV is becoming a major energy source in the future electricity grid worldwide. Therefore, PV systems and PV hybrids need to take over more and more system responsibility by providing ancillary services. The report highlights the status and the potential of PV and PV hybrids as an anci...
Article
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Integration of DC grids into AC networks will realize hybrid AC/DC grids, a new energetic paradigm which will become widespread in the future due to the increasing availability of DC-based generators, loads and storage systems. Furthermore, the huge connection of intermittent renewable sources to distribution grids could cause security and congesti...
Article
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Recently, due to the growth of the electric vehicle (EV) market, the investigation of grid-to-vehicle and vehicle-to-grid strategies has become a priority in both the electric mobility and distribution grid research areas. However, there is still a lack of large-scale data sets to test and deploy energy management strategies. In this paper, a fully...
Chapter
This chapter will discuss the main conclusions by summarizing the key findings in the entire book, while also proposing some future research directions and policy recommendations to foster the integration of Distributed Energy Resources at local level.
Chapter
This chapter is on multiobjective operation optimization of integrated energy systems (IES) considering multiple energy carriers to reduce energy costs in the short run and improve sustainability in the long run. In the system, multiple energy devices convert primary energy carriers with different costs to meet user demands, where different energy...
Chapter
The present evolution of the energy systems is characterized by an increase of small-size solutions, with which new aggregations of local integrated energy systems are emerging. The current policies on cleaner and efficient energy systems are providing opportunities to the development of systems supplied by renewable energy sources, and to the comb...
Chapter
This chapter deals with the problematics and opportunities introduced by the electric road vehicles in distribution grids. The first part pertains the description of electric road vehicles and their main characteristics, for example, energy and power, and the main features and issues of the alternating current and direct current charging infrastruc...
Chapter
Recently, the regulation in several countries is opening the possibility for electricity end-users to directly transact with their neighbors, in the framework of energy communities. Energy communities equipped with both distributed generation units, mainly from photovoltaics, and storage units will favor the local balance between production and con...
Book
Distributed Energy Resources in Local Integrated Energy Systems: Optimal Operation and Planning reviews research and policy developments surrounding the optimal operation and planning of DER in the context of local integrated energy systems in the presence of multiple energy carriers, vectors and multi-objective requirements. This assessment is car...
Article
Full-text available
In this work, we investigate an Information Fusion architecture based on a Factor Graph in Reduced Normal Form. This paradigm permits to describe the fusion in a completely probabilistic framework and the information related to the different features are represented as messages that flow in a probabilistic network. In this way we build a sort of co...
Article
Full-text available
Along with the increasing share of non-synchronous power sources, the inertia of power systems is being reduced, which can give rise to frequency containment problems should an outage of a generator or a power infeed happen. Low system inertia is eventually unavoidable, thus power system operators need to be prepared for this condition. This paper...
Article
Full-text available
Hybrid Systems in microgrid applications have gained relevance in power flow management in the context of the worldwide power grids transformation. Successfully integrating several technologies of micro resources and storage systems is a key component of microgrid applications. To address this issue, dc-bus signaling (DBS) is proposed here and used...
Technical Report
Full-text available
L’obiettivo dell’attività di ricerca, su base triennale, è quello di sviluppare e validare un tool di ottimizzazione multi-obiettivo economico/ambientale per la pianificazione operazionale day-ahead di una Local Energy Community, che funge anche da soggetto del mercato. In coerenza con l’obiettivo generale, il presente report documenta l’analisi sv...
Conference Paper
Nowadays it is increasingly pressing the need of efficient and reliable DC-DC interfaces especially in emerging energetic scenarios. In fact, Distributed Energy Resources and recent smart DC grid paradigms require appropriate conversion systems toward DC bus. Silicon based circuits have represented main actors during last sixty years electronics ex...
Article
Full-text available
This paper aims to give a footprint of the development potential of energy technologies in Italy providing a synthetic and general view to support policy makers in energy planning. The approach focuses on the impact on climate, the potential in terms of R&D, the competitiveness of Italian companies and their diffusion on the territory. A reference...
Article
Local energy communities (LECs), as locally and collectively organized multi-energy systems, are expected to play an important role in energy transition, since they enable deployment of sustainable energy technologies and consumer engagement, bringing various benefits to the community users and contributing to the overall energy and climate objecti...
Conference Paper
Full-text available
In order to deal with the evolution in place of the current power system, novel solutions are needed to support grid operators for the future operation of the electricity system in order to increase the security of supply accounting for the increasing share of renewable energy sources (RES). The goal of H2020 INTERPLAN Project (Nov. 2018-Nov. 2020)...
Patent
La presente invenzione è relativa a un rivestimento assorbitore solare spettralmente selettivo per un ricevitore di un impianto solare termico o solare termodinamico. In particolare, la presente invenzione trova vantaggiosa, ma non esclusiva applicazione, per un ricevitore a forma di tubo. http://industria.enea.it/news/2020/brevettato-rivestimento-...
Article
Full-text available
Panorama Ricerca & Innovazione-a cura di ENEA "LA TERMOTECNICA LUGLIO-AGOSTO 2020"
Article
Local multi-energy systems (LMES) have been recently recognised as a promising alternative to centralized energy supply systems to meet local energy needs, since they promote efficient use of the available energy thanks to the coordination of heat and power technologies, storage, flexible demand and plug-in electric vehicles (PEVs). In this framewo...
Article
Full-text available
The high penetration of the Renewable Energy Sources and other emerging technologies likely to be installed in future power grids will pose new operational challenges to grid operators. One of the main issues expected to affect the operation of the power grid is the impact of inverter-based technologies to the power system inertia and, hence, to sy...
Conference Paper
Full-text available
Over the last two decades, grid-connecte d solar photovoltaic systems have increased from a niche market to one of the leading power generation capacity additions annually. In 2019 the total worldwide installed photovoltaic electricity generation capacity exceeded 630 GW. It is forecasted that 1 TW will be reached by 2022. This further development...
Conference Paper
Abstract—Recently, due to the increment of electric vehicles (EVs), the investigation of vehicle-to-grid paradigm strategies has become a key concern in both the electric mobility and distribution grid research areas. Indeed each EV can be seen as a distributed energy storage, thus giving to each customer a potential active role in the energy distr...
Chapter
Microgrids represent a promising energetic scenario applicable in different contexts, especially in residential clusters. In this paper, authors propose a novel control logic to implement a coordinated management of generators, loads, and hybrid energy storage systems (HESS) in a microgrid by means of a hierarchical smart converter architecture. Th...
Article
Full-text available
This study proposes a stochastic optimisation programming for scheduling a microgrid (MG) considering multiple energy devices and the uncertain nature of renewable energy resources and parking lot-based electric vehicles (EVs). Both thermal and electrical features of the multi-energy system are modelled by considering combined heat and power genera...
Article
Full-text available
Recently, hybrid multi-energy systems consisting of multiple generation, conversion, and storage technologies have been receiving great attention as a promising option to meet the multi-energy demands of residential end-users, by transforming them from passive consumers to active prosumers, who both produce and consume energy. The design problem of...
Technical Report
Full-text available
The document provides the detailed description of the INTERPLAN Integrated Network Operation Planning tool and presents the results of the dynamic and semi-dynamic simulations for the five INTERPLAN base showcases. The INTERPLAN tool is defined as a methodology consisting of a set of tools (grid equivalents, control functions) for the operation pla...
Article
Thermal energy storage systems have increasingly attracted researchers and engineers in the last decades, not only because they permit to overcome the mismatch between thermal energy supply and demand in solar thermal systems, but also because they have the potential to improve the power grid reliability and flexibility, as they allow, for example,...
Technical Report
Full-text available
Modern technological trends for massive RES integration into the electrical grid together with the evolution of energy storage systems and the increasing penetration of electric vehicles contribute greatly to decarbonization of the energy systems and energy efficiency improvement. This initiates, however, significant challenges for the future opera...
Article
The characteristics of a thermo-sensitive electrical parameter used to estimate the junction temperature of power MOSFETs are presented. In particular, the dependence on temperature of the voltage appearing across the forward-biased body-diode at fixed currents is carefully investigated experimentally in order to optimize linearity and sensitivity....
Conference Paper
The growing penetration of distributed energy resources (DER) in distribution networks makes the power systems more vulnerable to congestion issues. However, these resources may offer new opportunities to grid operators, if they are properly managed for ancillary services (AS) provision. In this scenario, innovative methodologies and control scheme...
Conference Paper
Full-text available
Over the last two decades, grid-connected solar photovoltaic systems have increased from a niche market to one of the leading power generation capacity additions annually. In 2018 the total installed photovoltaic electricity generation capacity exceeded 500 GW. Another doubling is forecasted until the early 2020s. Therefore, the further development...
Conference Paper
Full-text available
This paper presents an overview of the results obtained during the first year of the INTERPLAN project, which aims to develop an integrated network operation planning tool to support the EU in reaching the expected low-carbon targets while preserving network security and reliability. The integrated tool means in terms of voltage levels, going from...
Poster
Full-text available
This poster and the corresponding paper present an overview of the results obtained during the first year of the INTERPLAN project, which aims to develop an integrated network operation planning tool to support the EU in reaching the expected low-carbon targets while preserving network security and reliability. The integrated tool means in terms of...
Conference Paper
With the increasing penetration levels of distributed energy resources (DER), grid congestion events may occur by causing severe damages and potential black outs in power systems. Developing innovative operation planning strategies and control tools for the grid congestion management is thus a primary goal for ensuring network reliability and secur...
Conference Paper
In recent years, power systems have been characterized by significant changes. The shift from centralized generation to non-dispatchable distributed generation needs crucial actions to maintain the network security and stability. In such a scenario, battery energy storage systems (BESS) are expected to have a key role for frequency restoration proc...
Article
Full-text available
Latent thermal energy storage systems using phase change materials (PCMs) represent an effective way of storing thermal energy because of high-energy storage density and the isothermal nature of the storage process. In the current study, the charging and discharging characteristics of a lab-scale latent heat storage (LHTES) prototype for cooling ap...
Conference Paper
To deal with the rising challenges associated with the increasing share of renewable energy resources (RES) in generation and installed capacity, as well as penetration of emerging technologies, such as storage and Demand Response (DR), the H2020 project INTERPLAN (Nov.2017-Nov.2020) has the aim to develop an INTEgrated network opeRation PLANning t...