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146 results on '"Bosich, Daniele"'

8. System Stability and Short Circuit Contribution as Discordant Targets in Cascade Connected DC Microgrids: a Design Procedure

Author

Vicenzutti, Andrea, Bosich, Daniele, Tavagnutti, Andrea Alessia, Sulligoi, Giorgio, Vicenzutti, Andrea, Bosich, Daniele, Tavagnutti, Andrea Alessia, and Sulligoi, Giorgio

Subjects
DC microgrid, LC filter, stabilit, power quality, short circuit
Abstract

Advanced DC microgrids design requires considering interdependent aspects. In these flexible grids with large penetration of high-bandwidth controlled converters, both system stability and short circuit limitation are crucial aspects to be attained. The design of filtering stages directly affects both: on one side the stability is beneficially influenced by a large filter capacitor, while on the other the short circuit current increases with oversized capacitors. Thus, voltage stability and filter’s short circuit contribution are discordant goals, which need to be carefully balanced by the designer. To solve this issue, a design procedure for sizing the LC filtering stage and the main bus voltage in a cascade-connected DC power system is proposed. The aim is to ensure meeting both voltage/current ripple requirements, as well as accomplishing system stability and limiting the energy supplied into a fault. Final tests on a Hardware-In-the-Loop system and electro-magnetic transients’ simulations are used to verify the effectiveness of the filter’s designing procedure.

Published
2022

9. The WBM Reconfiguration to Prevent the Instability on DC Shipboard Microgrids

Author

Tavagnutti, Andrea Alessia, Bosich, Daniele, Sulligoi, Giorgio, Tavagnutti, Andrea Alessia, Bosich, Daniele, and Sulligoi, Giorgio

Subjects
ship, DC microgrid, stability, WBM, PMS
Abstract

Most innovative DC shipboard microgrids are designed to feed high-performance loads with advanced flexibility feature. The onboard loads not only require great amounts of power, but also their management results dynamically demanding. To this aim, tightly controlled power converters are employed to supply the loads by the filtered DC distribution. In such an islanded system, high-bandwidth converters and LC filters can negatively interact thus finally jeopardizing the ship operation. Smart procedures are to be conceived to preserve the system stability by reconfiguring the online shipboard loads. As the system stability depends on power/bandwidth of each load, the Weighted Bandwidth Method (WBM) is adopted to aggregate the effect of the several controlled loads. Once the WBM identifies two controlled loads as representative of the total dynamics demand, a 3D map results consequent. It reveals the loads combination to be fed without impairing the stability. If the Power Management System (PMS) exploits the outcomes from the 3D map to perform planned reconfigurations, the onboard stable operation is certainly ensured.

Published
2022

25. Evolution of an Alpine Ski-Resort Distribution System Toward Microgrid.

Author

Bosich, Daniele, Dalle Feste, Marco, Sezenna, Paola, Monachesi, Fabio, and Sulligoi, Giorgio

Subjects
*POWER distribution networks, *POWER resources, *MICROGRIDS, *ELECTRIC power distribution grids, *ELECTRIC potential
Abstract

The Alpine ski-resorts are conventionally powered by the electrical distribution network to perform the snow-making operations throughout the ski slopes. On one hand, these grids can present a low capacity, and on the other, the line lengths are not negligible due to natural obstacles and altitude changes. As a consequence, the voltage drops are remarkable when several power loads are fed by the low voltage section. Based on this aspect, a novel evolution of ski-resorts power grids toward microgrids is pursued to improve the power system quality of service and to foster the implementation of distributed energy resources (DERs). The article examines the ac electrical distribution system installed in the ski-resort of San Vito di Cadore, Italy. A preliminary power flow analysis identifies bottlenecks on voltage profiles and weights effective solutions to evolve the power grid. Four system configurations are contrasted in terms of voltage drop in order to establish the most convenient redesign. A proper voltage profile along the entire ski-resort is ensured by the last solution, which redistributes the loads powering among the five resort's substations. Finally, a techno-economical-environmental analysis explores the possibility of installing DER and storage to feed the resort loads. The study demonstrates the capability of hydropower plant in enhancing microgrid sustainability and environmental friendliness. [ABSTRACT FROM AUTHOR]

Published
2022
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34. Integrated Ship Design and CSI Modeling: A New Methodology for Comparing Onboard Electrical Distributions in the Early-Stage Design

Author

Bucci, Vittorio, LA MONACA, Ubaldo, Bosich, Daniele, Sulligoi, Giorgio, Andrea, Pietra, Alberto Marinò, Vittorio Bucci, Bucci, Vittorio, LA MONACA, Ubaldo, Bosich, Daniele, Sulligoi, Giorgio, and Pietra, Andrea

Subjects
hybrid system, integrated design, computer system integrator, MVDC
Abstract

In recent years, the MVDC distribution has been proposed as a viable solution for the redesign of the shipboard Integrated Power System (IPS). Indeed, there are relevant advantages promised by the innovative DC concept, among others a desirable reduction in the electric power system size. For providing a virtual proof-of-concept of this technology, parametric and interactive 3D models can be developed by a new Computer System Integrator (CSI) software. The latter may give the possibility to quantify the expected onboard benefits (i.e. increase of pay load) already during the early-stage design, thus opening interesting evaluation since the very first stage of ship design. By exploiting the capabilities offered by the integrated design methodology, a comparative analysis between a conventional MVAC electrical distribution and innovative MVAC/MVDC hybrid systems is performed in this paper. In particular, a significant Main Vertical Zone of a large cruise ship is modeled by the CSI software for providing a detailed comparison (volumes/weights) among the power distribution architectures (MVAC vs hybrid MVAC/MVDC).

Published
2018

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