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271 results on '"Del Pizzo, Andrea"'

1. Microstructure Role in Permanent Magnet Eddy Current Losses

Author

Perna, Salvatore, Schrefl, Thomas, Serpico, Claudio, Fischbacher, Johann, and Del Pizzo, Andrea

Subjects
Physics - Applied Physics, Mathematics - Analysis of PDEs
Abstract

The impact of granular microstructure in permanent magnets on eddy current losses are investigated. A numerical homogenization procedure for electrical conductivity is defined. Then, an approximated simple analytical model for the homogenized conductivity able to capture the main features of the geometrical and material dependences is derived. Finally eddy current losses analytical calculations are given, and the two asymptotic expressions for losses in the stationary conduction limit and advanced skin effect limit are derived and discussed., Comment: 5 pages, 7 figures

Published
2020

4. Inverter Operation Mode of a PhotoVoltaic Cascaded H-Bridge Battery Charger.

Author

Coppola, Marino, Guerriero, Pierluigi, Dannier, Adolfo, Daliento, Santolo, and Del Pizzo, Andrea

Subjects
ELECTRIC current rectifiers, BATTERY chargers, ELECTRIC inverters, BATTERY storage plants
Abstract

The paper deals with a grid-connected single-phase battery charger integrated with photovoltaic generators (PVGs). The circuit topology consists of a multilevel architecture based on a Cascaded H-Bridge (CHB) rectifier. Its main task is to charge the batteries, primarily from the PVGs, by also assuring to keep their state-of-charge (SOC) balanced. Nevertheless, when the battery SOC overcomes a predefined upper limit, beyond which the charging process could be interrupted, the available PV power can no longer be transferred to the batteries. Therefore, to avoid an undesired curtailment of PV power production, this latter can be supplied to the grid by inverting the system operation. The paper shows how to achieve this result by implementing a dedicated control action based on a multi-step procedure. Numerical investigations are carried out on a 19-level CHB converter implemented in the PLECS environment to validate the feasibility and effectiveness of the proposed control technique. [ABSTRACT FROM AUTHOR]

Published
2023
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18. PSO-PR power flow control of a single-stage grid-connected PV inverter

Author

Di Noia Luigi Pio, Del Pizzo Andrea, Meo Santolo, Dannier Adolfo, Dannier, Adolfo, DEL PIZZO, Andrea, DI NOIA, LUIGI PIO, and Meo, Santolo

Subjects
Maximum power principle, business.industry, Computer science, 020209 energy, 020208 electrical & electronic engineering, Particle swarm optimization, 02 engineering and technology, AC power, Grid, Renewable energy, Power (physics), Control theory, Particle swarm optimization, proportional resonant, power flow control, 0202 electrical engineering, electronic engineering, information engineering, Inverter, Electric power, business
Abstract

In this article, a current control algorithm is conceived for converting solar dc power into ac power of high-quality. This conversion is based only on a dc-ac converter, avoiding the use of two stage converter. The proposed algorithm is founded on tracking the maximum power point which ensures controlling the electrical power exchanged with the grid. To assure a good dynamics and reduce the control errors, a proportional resonant controllers are utilized and a self-tuning founded on particle swarm optimization is utilized. The proposal strategy goodness is verified by means of numerical simulations.

Published
2017
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19. Second order variable structure control for wind turbine PMSG-based and generator-side converter system

Author

Del Pizzo Andrea, Meo Santolo, Di Noia Luigi Pio, Brando Gianluca, Brando, Gianluca, DEL PIZZO, Andrea, DI NOIA, LUIGI PIO, and Meo, Santolo

Subjects
Variable structure control, Wind power, business.industry, Computer science, 020208 electrical & electronic engineering, 02 engineering and technology, Turbine, Maximum power point tracking, Renewable energy, Renewable energy sources, Observers, Rotors, Stators, Wind power generation, Wind turbines, Control systems, Dc voltage, Robustness (computer science), Control theory, Control system, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, business
Abstract

The paper deals with a Second Order Variable Structure Control (VSC) for Wind Turbine PMSG-based and Generator-side Converter System. By means of the proposed control and the associated sliding observer, a vectorial control of PMSG generator is recognized while maximum power point tracking by the renewable source and DC voltage control of the generator-side converter are assured to maintain a high robustness in the face of parameters and load uncertainties within all the range variations of the controlled quantities.

Published
2017
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20. Integral sliding-mode direct torque control of sensorless induction motor drives

Author

Dannier, Adolfo, Del Pizzo, Andrea, Di Pio Noia, Luigi, Meo, Santolo, DI NOIA, LUIGI PIO, Dannier, Adolfo, Del Pizzo, Andrea, Di Pio Noia, Luigi, Meo, Santolo, and DI NOIA, LUIGI PIO

Subjects
Engineering, Control and Optimization, Vector control, Electromagnetics, Stator, business.industry, Mechanical Engineering, Induction motor drive, Sliding-mode control, Control engineering, Integral sliding mode, law.invention, DTC control, Direct torque control, Control theory, law, Robustness (computer science), Torque, Electrical and Electronic Engineering, business, Sliding-mode observer, Induction motor
Abstract

The paper deals with a full sliding mode approach for induction motor drives direct torque and flux control. The proposed solution is composed by an integral sliding-mode control and by a speed-sensorless sliding mode observer. The suggested Integral Sliding-Mode Direct Torque Control (ISMDTC) is formulated in the stator flux reference frame, without employing current regulators. The adopted sliding mode observer provides stator-flux and torque estimation, without rotor-speed adaptation. The numerical results show that the ISMDTC maintains the robustness of the sliding controller, reducing the chattering during the steady state. Moreover, it consents to achieve similar performance like more complex second-order SMC offering more simple implementation. The ISMDTC assures good accuracy and robustness to parameters deviations at low-speed operations as well as in all the operative range of the IM drives. For proving the goodness of the proposal the suggested control is also compared with a conventional DTC control.

Published
2017
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29. Super Twisting Sliding mode control of Smart-Inverters grid-connected for PV applications

Author

Del Pizzo Andrea, Meo Santolo, Di Noia Luigi Pio, Del Pizzo, A, Di Noia, L. P., and Meo, S.

Subjects
Total harmonic distortion, Computer science, 020209 energy, 020208 electrical & electronic engineering, 02 engineering and technology, Power factor, AC power, Grid, Sliding mode control, Compensation (engineering), Control theory, 0202 electrical engineering, electronic engineering, information engineering, Inverter, Voltage
Abstract

In this paper, it is proposed a robust Second-Order Super-Twisting Sliding Mode Control for a Grid-connected inverter of a PV power plant. The proposed control strategy is able to maximize the energy extracted from the PV while regulating the DC-link voltage and achieving a power factor compensation and the reduction of currents harmonic distortion. Both in balanced or unbalanced condition, the grid is supplied by the PV plant with the desired active power and with the developed strategy, it is possible to use the inverter as a reactive power compensator. In order to prove the goodness of the proposed algorithm in terms of high efficiency and performance, some simulated and experimental results are carried out.

Published
2017

40. Azionamenti Elettrici

Author

DEL PIZZO, ANDREA and DEL PIZZO, Andrea

Subjects
Macchine elettriche, convertitori elettrici, azionamenti controllati
Published
2012

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