The control and the protection system has an essential role in the over-all performance of the High Voltage Direct Current (HVDC) transmission system applications. The main objective of the present paper is to give the solutions of some performances problems that can occur in the conventional HVDC link. Indeed some protection and control devices are inserted to allow the system behavior study. Whereas the HVDC control system overall reliability is not only depending on the controllers, but it is depending also on the protection subfunctions as well. Furthermore, in this paper the actions that are taken by some HVDC link protection systems when faults or dysfunctions occur are presented. In the first step, the model validity is demonstrated based on the obtained waveforms analysis from the simulation under various disturbances. On the other side, the control and the protection robustness are tested and demonstrated during severe operating condition.
In High Voltage Direct Current (HVDC) transmission system applications, the control and protection system plays an essential role in the overall performance. This paper aims to give solutions to some performance problems that can occur in the HVDC link. In this paper, ways to mitigate this serious malfunction of the commutation failure process in the operation of HVDC converters are studied and protection functions like the Commutation Failure Prevention (CFPREV) have been used. Furthermore, HVDC transmission systems are vulnerable to DC faults and its protection becomes ever more important with the fast growth in the number of installations. In this context, the DC fault protection function is one of the most important challenges to the development of HVDC transmission systems. The dynamics of the studied power system including the HVDC link are thoroughly investigated in this paper through various simulation scenarios.
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