| Abstract |
Nowadays, high voltage direct current transmission systems are being selected over the traditionalalternating current transmission for very long transmission distances. However, there are still someunresolved challenges, most of them in terms of protection of the system. If using traditionalprotection systems used in alternating current grids, the characteristics of a DC fault make itcomplicated to clear and dangerous to power electronic components. Hence, there is a need of veryfast fault detection and clearance. This paper proposes a full-selective protection system based on arate of change of voltage. The process of selection of the threshold needed to discriminate faultconditions is described. In addition, the performance of the protection algorithm is analysed. Theinfluence of parameters such as the fault location and fault resistance is evaluated. A comparison withsimilar algorithms found on the literature is presented at the end. |
