A5085214392- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- Microgrid Control and Optimization
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- HVDC Systems and Fault Protection
- Silicon Carbide Semiconductor Technologies
- Particle accelerators and beam dynamics
- Power Systems and Renewable Energy
- Islanding Detection in Power Systems
- Electric and Hybrid Vehicle Technologies
- Sensorless Control of Electric Motors
- Supercapacitor Materials and Fabrication
- Fusion materials and technologies
- Induction Heating and Inverter Technology
- Photovoltaic System Optimization Techniques
- Power Quality and Harmonics
- Spacecraft Design and Technology
- Advanced Battery Technologies Research
- Electric Motor Design and Analysis
- Iterative Learning Control Systems
- Advanced Sensor Technologies Research
- Welding Techniques and Residual Stresses
- Wind Turbine Control Systems
- Advanced Machining and Optimization Techniques
National Agency for New Technologies, Energy and Sustainable Economic Development
2022-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2023-2024
University of Rome Tor Vergata
2015-2024
University of Nottingham
2018-2021
Roma Tre University
2014
The Plant Electrical System (PES) of the European DEMOnstration fusion power plant (DEMO), presently under conceptual design, shall supply to loads and deliver net Power Transmission Grid (PTG). Starting from available requirements, applicability DEMO PES technologies design approaches adopted in ITER nuclear plants (NPP) has been evaluated. This article presents results survey proposes alternative solutions deal with identified criticalities.
The Divertor Tokamak Test (DTT) facility is in advanced design and construction phase at the ENEA laboratories Frascati, Italy, to contribute study, assessment of systems for treatment heat exhaust. DTT Toroidal Field (TF) magnet system consists 18 superconducting coils, fed series by a single power supply (TFPS), which 24-pulses thyristor-based converter with an output DC current up 44 kA. In case quench superconductors, magnetic energy stored coils extracted 3 Fast Discharge Units (FDUs)...
The synchronization between power grid and distributed sources is a crucial issue in the concept of smart grids.For tracking real-time frequency phase threephase grids, phase-locked loop (PLL) technology commonly used.Many existing PLLs with enhanced disturbance/harmonic rejection capabilities, either fail to maintain fast response or are not adaptive variations have high computational complexity.This paper therefore proposes low burden Repetitive Controller (RC) assisted PLL (RCA-PLL) that...
In this article, a novel matrix converter modulation, which minimizes the losses is proposed. This approach preserves same voltage ratio of traditional modulations with key concept to compute duty cycles using only two closest input voltages instead all three-phase voltages. Compared Alesina-Venturini new strategy achieves higher efficiency due lower switching losses, in addition reduced harmonic content on output current. Hence, detailed mathematical treatment based knowledge power demand...
In the past two decades, much research and industry effort has been dedicated to transportation electrification. particular, aerospace industry, with more electric aircraft (MEA) revolution, is shifting toward usage of electrical in place mechanical energy on board save fossil fuel reduce polluting emissions. For this reason, phase-locked loops (PLLs) systems have well developed for synchronizing different power sources loads within grid. Since one proposed solutions MEA grids operate at...
Tokamaks are a very promising option to exploit nuclear fusion as programmable and safe energy source. A critical issue for the practical use of tokamaks consists power flow required initiate sustain process, in particular poloidal field coils. This can be managed by introducing DC storage based on supercapacitors. Because such may most expensive largest part supply system, an excessive size would cancel its potential advantages. paper presents innovative strategies optimize systems. The...
Nowadays the interest in active networks is significantly growing as a result of larger diffusion renewable energy sources and distributed generation systems connected to grid. The possibility installing key points these modern smart devices capable intelligent routing power flow control, highly desirable this scenario. Multilevel converters and, particular, Cascaded H-Bridge allow required flexibility, availability reliability be considered building block for nodes future electrical This...
The paper presents various control strategies for an advanced multilevel-based power converter. A Fuzzy Logic Control, based on balance constrains and Proportional Reactive Power a more rigorous approach, have been proposed. Two different ways to assign reactive powers illustrated both the then compared in Matlab/Simulink environment accounting two active sets. Finally, advantages drawbacks of proposed highlighted.
At the current state, development of Medium Voltage Solid-State Transformers is mainly limited by maximum voltage rating supported available power devices as well existing circuit topologies. This paper introduces, for first time, a new conversion structure three-phase isolated AC/AC converter namely "ROMAtrix converter". The proposed modular architecture permits to halve ratings given grid voltage, so enabling connections wider range MV networks. In this paper, concept ROMAtrix converter,...
The role of distributor system operators is experiencing a gradual but relevant change to include enhanced ancillary and energy dispatch services needed manage the increased power provided by intermittent distributed generations in medium voltage networks. In this context, paper proposes insertion, strategic points network, specific electronic systems, denoted as active nodes, which permit remote controllability reactive flow. Such capabilities, further benefit, enable provide network...
This paper presents the modulation strategy for 25 kW AC-DC isolated Matrix Charger three-phase rectifier (MCharger). The proposed topology allows current and voltage regulation energy storage devices such as EVs batteries. Compared to a standard Dual-Active-Bridge topology, converter directly perform an AC-AC conversion thus eliminating rectifying stage. A high frequency (HF) waveform is generated feed isolation transformer, which characterized by almost negligible leakage inductance,...
The proposed paper deals with the modeling, analysis, and validation of an active split DC-bus configuration to be intended for three-phase four-leg inverters. By State Space Averaging technique, topology is analyzed derive mathematical model that suitable represent both steady state dynamic behavior, taking into account main converter non-idealities. has been validated by comparing obtained transfer functions system responses, switching based simulations achieved aid Matlab/Simulink finally...
The matrix converter is an AC/AC constituted by array of controlled semiconductor switches that connects directly the three-phase source to load. major development converters begins when Alesina and Venturini proposed basic principles operation in `80s. In their modulation methods, through common-mode-voltage addition technique a voltage ratio 86.6% can be obtained. this paper, novel method which preserves same traditional modulations proposed. key concept approach use only two closest input...
In this paper a new control technique for matrix converter based on Linear Quadratic Regulator (LQR) is proposed. Stabilization of often challenging due to the input filter resonance. The proposed method compared with classical approaches control. It will be shown how approach can guarantee higher output current bandwidth providing also good attenuation grid disturbance.
Under the concept of transportation electrification, more electric aircraft (MEA) involves electrical energy to reduce emissions. Phase-looked loops (PLLs) have been well developed for synchronizing different power sources in a grid. Since MEA operates at variable frequency from 360 Hz 800 Hz, third-order model based steady-state linear Kalman filter PLL (SSLKF-PLL) has proposed literature achieve fast tracking performance during such grid variations. To suppress potential disturbances due...
Zero-Voltage-Transition (ZVT) DC-DC converters with active snubber can be conveniently employed in photovoltaic applications requiring high efficiency and isolation transformer. In order to improve the dynamic response of converter, a Feed-Forward current controller is proposed compared conventional proportional-integral controller. The control achieved using equivalent converter electrical model desired reference, calculates expected operating point; then, suitable correction term added...
This paper presents the concept of a control strategy for Solar Array (SA) power regulation using an independent Maximum Power Point Tracking system each section in order to maximize extracted from every SA sections. Moreover, it allows distribute battery charge current between sources evenly divide switching losses on semiconductors converters and, thus, extending their life time and reduce dissipation power. The proposed can be applied Control Unit designed satellites with unregulated bus...
While power networks evolve towards the new concept of smart grids, with proliferation electronics embedded systems and distributed generation, insurgence system unbalance voltage harmonic distortion, become more frequent. Also, often a noisy sampling can produce offsets in measurements. Such imperfections bring challenges to phase identification using traditional phase-lock loop (PLL), utilized control all grid connected converters. However, since lead periodic harmonics corresponding...
Surface Permanent Magnet Synchronous Motor (SPMSM) are not the first choice when a motor drive is required to operate over wide speed range with an extended Constant Power Speed Range (CPSR). Nevertheless, SPMSMs offer high torque density, efficiency simple manufacturing process and robustness which makes them attractive alternative Interior PMSMs. The Open End Winding (OEW) dual inverter topology, one of two Voltage Source Inverters (VSI) connected floating capacitor (FC), has shown be...
This paper proposes a Predictive Control, formally Dead-Beat (DBC), for four-leg inverter having an Active Split DC-bus on the fourth leg and LC filters phase-to-neutral outputs. Such configuration permits to reduce voltage ripple neutral point connected grounding. As only few control techniques have been investigated DC-bus, investigate performance of DBC, which has widely used other power electronics applications. The main advantage DBC over classical PI or Resonant controller is that no...
The Divertor Tokamak Test (DTT) facility is expected to provide a significant contribution nuclear fusion research, in particular DEMO, the first reactor able deliver net energy external grid. main scope of DTT development techniques and components manage power exhaust coming from processes. complete tokamak including several supply systems. poloidal field central solenoid supplies are especially challenging, due very high currents necessity continuously adjust magnetic field. Moreover,...
Solid-State Transformers (SST) have been growing importance in the upcoming power distribution system. Currently available circuit topologies and maximum voltage rating supported by devices are key limits usage of into Medium Voltage (MV) systems. To overcome these limitations, a novel solution denoted as ROMAtrix converter has proposed needs to be explored. Such configuration is able preserve all benefits existing SSTs topologies, such bidirectional flow, isolation barrier with medium...
Zero-Voltage Transition (ZVT) DC-DC converters with active snubber can be used in photovoltaic applications requiring high efficiency and high-frequency isolation transformer. In order to improve the dynamic response of ZVT converters, two different current control strategies, namely Feed Forward Dead-Beat, are proposed. The Dead-Beat control, both based on converter electrical model, produces better performance than a classical PI-type controller. After detailed description mathematical...