Modelling and Control of DC Microgrids in Residential Buildings

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Paper number
867
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Motta, Sergio, VTT, Finland
Alahäivälä, Antti, VTT, Finland
Astero, Poria, VTT Research Center of Finland, Finland
Pasonen, Riku, VTT, Finland
Kulmala, Anna , VTT Technical Research Centre of Finland, Finland
Mäki, Kari, VTT Research Center of Finland, Finland
Cho, YoungPyo, KEPCO Research Institute, Korea Republic of
Kim, HongJoo, KEPCO Research Institute, Korea Republic of
Abstract
Microgrids are considered as one of the most promising directions for the future of power systems. A major point in the characterization of a Microgrid is its ability to operate isolated from the main grid (islanded mode). However, the management strategy to allow such operation still poses a significant challenge in the implementation of these systems. The focus of this work is the behaviour of the distribution grid of a large-scale residential building during grid-connected and islanded modes, especially in terms of the control strategy to maintain a stable and uninterrupted supply of electricity.We developed aplatform for simulating a DC Microgrid’s (DCMG) long-term operation using a PSCAD model. This model allows for the simulation of a residential DCMG, targeting its energy management to maintain power balance under various conditions, including during islanded operation. This work discusses the control strategy used to maintain the voltage level at the distribution bus within a 5% limit of it’s rated value. For a theoretical building, the model yielded 2 hours of unlimited supply, and extra 4 hours of critical-load only. The results indicates that the proposed control strategy allows for adequate independence and stable operation during loss of grid connection.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/176
http://dx.doi.org/10.34890/348
ISSN
2032-9644
ISBN
978-2-9602415-0-1