This paper aims to analyze Variable Speed Wind Turbine impact on transient behavior of a power system using time domain simulation. To this purpose, suitable mathematical models for Doubly Fed Induction Generators and Permanent Magnet Synchronous Generators with their control devices are considered. Simulations allow to assess the influence of VSWT on conventional synchronous generator dynamics after short-circuit fault occurrence.

An extreme flexibility of a microgrid operation requires general, integrated and hierarchical proper management and control systems. A wide variety of communication technologies from communication medias, communication protocols to sensors and algorithms are available for microgrid applications. The requirements of communication capabilities differ with the varying microgrid architectures, physical scales, control strategies, functions. In this paper, typical communication protocols are applied to the layout of an experimental microgrid (MG). A hierarchical control is then implemented in order to allow primary and secondary generation unit regulation of the MG.

The integration of a Micro Grid (MG) in the distribution system requires the development of energy management procedures to provide flexibility to distribution system operators. In this paper, a tool for the day-ahead operation plan of a grid-connected MG, including distributed generators, electrical and thermal loads and storage devices, is proposed. The operation condition of the MG components is optimized by minimizing production and operational costs while satisfying electrical and thermal load demand. The procedure is applied to a test-bed of an experimental MG.""" DICORATO Maria;TROVATO Michele Antonio"

In questo lavoro si effettua un’analisi finanziaria con l’obiettivo di determinare la convenienza economica dell’investimento nella produzione di energia elettrica da fonte nucleare all’interno del mercato elettrico italiano. A tal fine, sono valutate le varie voci di costo di un impianto tipo con tecnologia European Pressurized Reactor (EPR) tenendo conto di due possibili scenari, caratterizzati da differenti modalità di finanziamento. Sono inoltre effettuate simulazioni di mercato per 40 anni in presenza di impianti nucleari al fine di valutare l’impatto sui prezzi e sulla redditività.

L’integrazione nel sistema elettrico di impianti a fonti rinnovabili non programmabili è vincolata al rispetto di regole tecniche operative. I sistemi di accumulo, opportunamente abbinati con questi impianti, possono essere utilizzati per un’efficiente programmazione oraria della produzione

"The problem of integrating intermittent renewable sources into power system is object of several studies. The use of suitable storage devices for shaving short term variability, increase predictability as well as improving correspondence to load curves is one of the prospected solutions. In this paper, effects of storage devices coupled with remarkable wind power on Italian day-ahead electricity market is investigated."