Experimental investigation of distribution grid restoration concepts using neighboring islanded LV-microgrids
Loading...
Paper number
558
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Linnartz, Philipp, Institute for High Voltage Technology – RWTH Aachen University, Germany
Schulte, Nicolas, Institute for High Voltage Technology – RWTH Aachen University, Germany
Simon, Sandor, Institute for High Voltage Technology – RWTH Aachen University, Germany
Schulte, Nicolas, Institute for High Voltage Technology – RWTH Aachen University, Germany
Simon, Sandor, Institute for High Voltage Technology – RWTH Aachen University, Germany
Abstract
Nowadays low voltage microgrids can be used for the emergency power supply of local loads. To reduce downtime and to increase the security of supply of the surrounding distribution grid, these microgrids might be connected via the medium voltage grid to neighboring low voltage grids as part of a bottom-up grid restoration concept. That way the potential of distributed energy resources installed in the distribution grid can be used to prolong the time of emergency power supply and expand the area to more customers.In this paper, a bottom-up grid restoration concept is experimentally investigated with special focus on the startup process of a microgrid and the distribution transformers until the successful synchronization of a neighboring microgrid.Central results are that with the investigated grid-forming units the energizing of the distribution transformers as well as the synchronization of a neighboring microgrid is possible. However, special attention has to be drawn to the high peak values of the inrush currents of the distribution transformers and to the according design of the grid-forming unit to endure or mitigate these phenomena (e.g. using a voltage soft-start function).
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Published in
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/64
http://dx.doi.org/10.34890/136
http://dx.doi.org/10.34890/136
ISSN
2032-9644
ISBN
978-2-9602415-0-1