Prof. Elisabetta Tedeschi
Department of Electric Power Engineering, Norwegian University of Science and Technology, 7030 Trondheim, Norway
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Academic Career Length
22Years (2005-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 January 2018 in Renewable and Sustainable Energy Reviews
Journal Article
26 September 2011 in IEEE Transactions on Energy Conversion
Journal Article
Elisabetta TedeschiMCMatteo Carraro
Matteo Carraro
MMMarta Molinas
Marta MolinasPMPaolo Mattavelli
Paolo Mattavelli
The choice of the most suitable control strategy for wave energy converters (WECs) is often evaluated with reference to the sinusoidal assumption for incident waves. Under this hypothesis, linear techniques for the control of the extracted power, as passive loading and optimum control, are well known and widely analyzed. It can be shown, however, how their performances are fundamentally different when irregular waves are considered and the theoretical superiority of optimum control is questionable under real wave conditions. Moreover, the global optimization of WECs implies a rational design of the power electronics equipment. This requires the analysis of the instantaneous extracted power in addition to the average one. In this paper, the impact of irregular waves on the power extraction when using different control techniques is analyzed in the case of a point absorber in heave. It is also shown how a convenient tradeoff between high average power extraction and limited power electronics overrating can be obtained by applying simple power saturation techniques. Moreover, the impact of power conversion efficiency on the control strategy is analyzed.
4 April 2008 in IEEE Transactions on Industrial Electronics
Journal Article
LCLuca Corradini
Luca Corradini
PMPaolo Mattavelli
Paolo Mattavelli
Elisabetta TedeschiDTDaniele Trevisan
Daniele Trevisan
This paper investigates multi sampled digitally controlled switched-mode power supplies with switching ripple compensation. In digital controllers for power converters, the main bandwidth limitations come from A/D conversion time, computational delays, and small-signal delay of the digital pulsewidth modulator (DPWM). In hard-wired digital-controller technologies, such as in dedicated digital IC and/or in field-programmable gate arrays (FPGAs), the calculation delays can be made negligible with respect to the switching period; thus, when fast ADCs are used, the overall phase lag is dominated by the DPWM. The multi sampling approach can strongly reduce the DPWM delay, thus breaking the bandwidth limitations of conventional single-sampled solutions. In this paper, the additional aliasing effects, which would require a filtering action, are avoided, exploiting the periodic nature of the switching ripple under steady-state conditions using a repetitive-based filtering action. Simulation and experimental results on a 1.2-V-10-A 500-kHz synchronous buck converter, where the digital control has been implemented in the FPGA, confirm the properties of the proposed solution.
25 November 2023 in Renewable and Sustainable Energy Reviews
Journal Article
HSHan Shao
Han ShaoRHRui Henriques
Rui Henriques
Hugo MoraisElisabetta Tedeschi9 July 2007 in IEEE Transactions on Power Electronics
Journal Article
SSS. Saggini
S. Saggini
WSW. Stefanutti
W. Stefanutti
Elisabetta TedeschiPMPaolo Mattavelli
Paolo Mattavelli
This letter proposes a simple tuning algorithm for digital deadbeat control based on error correlation. By injecting a square-wave reference input and calculating the correlation of the control error, a gain correction for deadbeat control is obtained. The proposed solution is simple, it requires a short tuning time, and it is suitable for different DC-DC converter topologies. Simulation and experimental results on synchronous buck converters confirm the properties of the proposed tuning algorithm.
21 December 2011 in IEEE Transactions on Industrial Electronics
Journal Article
Elisabetta TedeschiMMMarta Molinas
Marta MolinasIn wave energy converters (WECs), the maximum power extraction would be achievable at the expense of a very high rating of the electric and power electronics equipment. The goal of this paper is to show how a convenient tradeoff between high-power extraction and viable electrical device rating can be achieved by a proper choice of the WEC control strategy. Referring to a direct coupled point absorber in heave operating in regular waves, it will be analytically shown how most common control techniques impact on both the power performance and the power takeoff (PTO) rating. Thus, a tool that can assist in the preliminary PTO sizing by taking into account the main constraints imposed by the application is obtained. Following, an adaptive control strategy including a reactive component is proposed, whose goal is to improve the overall system performance when the WEC is already operative in the sea. Its effectiveness in increasing the average power extraction while respecting the PTO peak power constraint is proved by computer simulations in both regular and irregular waves, and specific analyses also including the PTO force/torque limitation are finally developed.
About Me
Elisabetta Tedeschi received an M.Sc. degree (Hons.) in electrical engineering and a Ph.D. degree in industrial engineering from the University of Padua, Italy, in 2005 and 2009, respectively.
From 2009 to 2011, she was a postdoctoral researcher with the Norwegian University of Science and Technology (NTNU), working on the grid integration of offshore renewable energies. She was a researcher/Marie Curie fellow at Tecnalia, Spain, from 2011 to 2013, where she worked as the principal investigator in the FP7-Sea2grid Project, related to the storage needs for the grid integration of wave energy converters. From 2013 to 2014, she was a research scientist at SINTEF Energy and an adjunct associate professor at NTNU. In 2014, she became a full professor within the offshore grid at NTNU.
Since 2020, she has also been a full professor at the Department of Industrial Engineering, University of Trento, Italy.
She has a core competence in the design and control of energy conversion and transmission and distribution systems, with a focus on offshore energy and power-quality issues. She has led and/or contributed to more than 15 national and international scientific projects and she has authored or coauthored two book chapters and more than 130 journals and conference papers in the field of marine energy and energy conversion systems.