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Online ISSN 1752-1424
Print ISSN 1752-1416

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IET Renewable Power Generation (RPG) brings together the topics of renewable energy technology, power generation and systems integration, with techno-economic issues. All renewable energy generation technologies are within the scope of the journal.

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Impact Factor: 3.605
5-year Impact Factor: 3.649
CiteScore: 4.6
SNIP: 1.452
SJR: 1.041

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2020 Research Highlights

Khaled Saleh

Khaled Saleh, CanmetENERGY, Natural Resources Canada, Varennes, QC, Canada

Fault detection and location in medium-voltage DC microgrids using travelling-wave reflections

This paper presents an innovative method to detect faults in medium voltage DC (MVDC) micro-grids based on the reflections of travelling-waves. The proposed method assumes that inductors are connected at each termination of the line. Therefore, the voltage travelling waves are fully reflected and cannot be transmitted to other lines, thus strongly reducing interference from other signals of different parts of the network. The travelling wave voltage is then compared to a threshold to detect any variation due to a fault on the line and complemented by at least 2 additional reflections to improve accuracy. Due to the influence of cable length and location on the reflection time, this technique is mainly suitable for microgrids with underground cables. The study has been validated using a sample 12-bus, ±2.5 kV, TN-S grounded, test MVDC microgrid, and shows a fault detection time lower than 128 μs for all the test, which is compatible with existing protection schemes for MVDC grids. The main impact of the study is the improvement of protection schemes of MVDC grids that will support their future developments. - Pietro Tricoli, Deputy Editor-in-Chief

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