Perez-Molina, M.J.Eguia-Lopez, P.Larruskain-Eskobal, M.Etxegarai-Madina, A.Apiñaniz Apiñaniz, S.2020-10-152020-10-152020Perez-Molina, M.J., P. Eguia-Lopez, M. Larruskain-Eskobal, A. Etxegarai-Madina, and S. Apiñaniz Apiñaniz. “Fault Detection Based on ROCOV in a Multi-Terminal HVDC Grid.” Renewable Energy and Power Quality Journal 18 (June 2020): 167–171. doi:10.24084/repqj18.260.http://hdl.handle.net/11556/1004Protection of a meshed VSC-HVDC grid is a challenge due to the behaviour of DC current and voltage signals during fault conditions. Protection systems must operate in a very short time range. Since fault detection should be very fast, local measurement based algorithms are mostly used; communication based algorithms lack the needed speed as a result of the communication time delay. This way, a ROCOV algorithm is proposed in this paper. This algorithm is analysed for different fault conditions.engjournal article10.24084/repqj18.260open accessHVDC gridROCOVFault detectionProtection systemVSC2172-038X