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Reverse supply of an AC distribution feeder through a Medium Voltage DC link

F. Belloni, R. Chiumeo, C. Gandolfi, D. Palladini, A. Villa

2016/5/20

Abstract

Medium Voltage Direct Current grids seems a promising solution for meshing AC grids, in order to enhance their distributed generators hosting capacity. The DC link is created through power electronics interface converters, which allow implementing different functions through suited control strategies. In particular, the paper investigate the possibility of supplying AC connected loads in island operation, i.e. separated from the mains, when a fault occurs in one of the AC grids. A 5 MW link is considered in the paper. Relevant power converters has been designed and modelled in a digital simulation environment. A complex control strategy for the management of
the complete process of island supply and reconnection to mains, involving also communication between converters and grid protections, has been implemented and tested through simulations. Simulation results confirms the effectiveness of the proposed approach.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 14)
Pages:436-440 Date of Publication: 2016/5/20
ISSN: 2172-038X Date of Current Version:2016/05/04
REF:357-16 Issue Date: May 2016
DOI:10.24084/repqj14.357 Publisher: EA4EPQ

Authors and affiliations

F. Belloni, R. Chiumeo, C. Gandolfi, D. Palladini, A. Villa
Ricerca sul Sistema Energetico – RSE s.p.a. Milano. Italy

Key words

Medium Voltage Direct Current link, power electronics, island operations, reverse supply, meshed distribution
grids.References

References

[1] Sanjay K. Chaudhary, Josep M. Guerrero, Remus Teodorescu, “Enhancing the Capacity of the AC
Distribution System Using DC Interlinks—A Step Toward Future DC Grid”, IEEE TRANSACTIONS ON SMART
GRID 2015
[2] F. Belloni, R. Chiumeo, C. Gandolfi M. Brenna, “Application of Back-to-Back Converters in Closed-Loop and Meshed MV Distribution Grid”, AEIT Annual Conference - From Research to Industry: The Need for a More Effective Technology Transfer (AEIT), 2014
[3] Pracha Khamphakdi, Kei Sekiguchi, Makoto Hagiwara, Hirofumi Akagi, “Design and Experiment of a Back- To-
Back (BTB) System Using Modular Multilevel Cascade Converters for Power Distribution Systems”, ECCE Asia
Downunder (ECCE Asia), 2013 IEEE.
[4] M. Chiandone, G. Sulligoi, P. Manià, G. Piccoli, “A backto-back system for power flow control in transnational
distribution systems”, AEIT Annual Conference - From Research to Industry: The Need for a More Effective
Technology Transfer (AEIT), 2014
[5] F. Belloni, C. Chiumeo, C. Gandolfi, S. Pugliese, “Simulation model of a protection scheme for active
distribution networks”, International Conference on Renewable Energies and Power Quality (ICREPQ’13),
Bilbao (Spain), 20th to 22th March, 2013

 
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