A Cosine Similarity Based Centralized Protection Scheme for DC Microgrids
Journal article, 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
Author
Rabindra Mohanty
Chalmers, Electrical Engineering, Electric Power Engineering
Subham Sahoo
Aalborg University
Ashok Kumar Pradhan
Indian Institute of Technology
Frede Blaabjerg
Aalborg University
IEEE Journal of Emerging and Selected Topics in Power Electronics
2168-6777 (ISSN) 2168-6785 (eISSN)
Vol. 9 5 5646-5656Areas of Advance
Energy
Subject Categories
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/JESTPE.2021.3060587
Related datasets
A Cosine Similarity Based Centralized Protection Scheme for DC Microgrids [dataset]
DOI: 10.1109/JESTPE.2021.3060587