Calendario Eventi

Conferenze e Seminari
Venerdì 9 Febbraio 2018
Aula Pacinotti - Scuola di Ingegneria - Università di Pisa
10,00 -12,00

Seminars at University of Pisa

Prof. Federico Milano, University College Dublin   9th February, 10.00-12.00 Aula Magna Pacinotti

1. Title: Wind speed models based on Stochastic Algebraic-Differential Equations (SDAEs)

Abstract:Traditionally, the stability analysis of power systems has been based on approximated deterministic models whose dynamic behavior is dominated by synchronous machines and their controllers. However, in recent years, the increasing penetration of renewable energy resources, such as wind and solar, has motivated researchers and practitioners to rethink the modeling and simulation of modern electric networks. This seminar will discuss the modeling of uncertainty and volatility due to wind generation through stochastic differential-algebraic equations. Both Gaussian and non-Gaussian processes are considered in talk and particular attention is dedicated to the implementation of the autocorrelation of the processes. Computer implementation and numerical aspects are also discussed.

2. TitleFrequency divider: how to estimate frequency during electromechanical transients in power systems

Abstract: The conventional power system model for transient stability analysis is based on the assumption of quasi-steady-state phasors for voltages and currents. The crucial hypothesis on which such a model is defined is that the frequency required to define all phasors and system parameters is constant and equal to its nominal value. This model is appropriate as long as only the rotor speed variations of synchronous machines is needed to regulate the system frequency through standard primary and secondary frequency regulators. In recent years, however, an increasing number of devices other than synchronous machines are expected to provide frequency regulation. These include, among others, distributed energy resources such as wind and solar. However, these devices do not generally impose the frequency at their connection point with the grid. There is thus, from a modeling point of view, the need to define with accuracy the local frequency at every bus of the network. The presentation illustrates an accurate yet simple and computationally inexpensive formula, namely, the frequency divider, to estimate such frequencies and, thus, improve the fidelity of the conventional power system model for transient stability analysis.


3. Bio 

Federico Milano received from the Univ. of Genoa, Italy, the ME and PhD in Electrical Eng. in 1999 and 2003, respectively. From 2001 to 2002 he was with the University of Waterloo, Canada, as a Visiting Scholar. From 2003 to 2013, he was with the University of Castilla-La Mancha, Spain. In 2013, he joined the University College Dublin, Ireland, where he is currently Professor of Power Systems Control and Protections. He was elevated to IEEE Fellow in 2016 for his contributions to power system modeling and simulation, and to IET Fellow in 2017. He is or has been an editor of several international journals published by IEEE, IET, Elsevier and Springer, including the IEEE Transactions of Power Systems and the IET Generation, Transmission & Distribution. He is also a member of the IEEE Power System Dynamics Performance Committee and the chair of the Local Organizing Committee of the PSCC 2018, the will be held in Dublin.

Per informazioni:

Emanuele Crisostomi, PhD
Associate Professor of Electrical Engineering
Department of Energy, Systems, Territory and Constructions Engineering (DESTEC) - University of Pisa
L.go L. Lazzarino, 56122 Pisa, Italy
Phone (Office): +39 050 2217119
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