A Cosine Similarity Based Centralized Protection Scheme for DC Microgrids
Artikel i vetenskaplig tidskrift, 2021
several works have been suggested based on unit and nonunit protections for DC microgrids. Threshold selection and protection coordination are the challenges associated with nonunit protection. Similarly, communication delay and link failure limit the application of unit protection. To address these issues, this paper presents a robust centralized protection scheme for DC microgrids, which is resilient to communication delay and link failure. It uses current of each line segment to compute the similarity of current change at both ends of the line segment to derive the protection decision. To overcome the communication failure from one end of the line segment or even from multiple segments, the proposed method uses data from adjacent segments to derive the protection decision correctly. Using PSCAD/EMTDC environment, the performance of the proposed method is evaluated for various cases and compared with available techniques. Finally, the accuracy of the protection algorithm is validated under experimental conditions.
DC microgrid
communication
fault analysis.
cosine similarity
Centralized protection
Författare
Rabindra Mohanty
Chalmers, Elektroteknik, Elkraftteknik
Subham Sahoo
Aalborg Universitet
Ashok Kumar Pradhan
Indian Institute of Technology
Frede Blaabjerg
Aalborg Universitet
IEEE Journal of Emerging and Selected Topics in Power Electronics
2168-6777 (ISSN) 2168-6785 (eISSN)
Vol. 9 5 5646-5656Styrkeområden
Energi
Ämneskategorier
Annan elektroteknik och elektronik
DOI
10.1109/JESTPE.2021.3060587
Relaterade dataset
A Cosine Similarity Based Centralized Protection Scheme for DC Microgrids [dataset]
DOI: 10.1109/JESTPE.2021.3060587