| Abstract |
Diode Rectifier (DR) based HVDC transmission can significantly reduce system costs and foot printof an HVDC power station for Offshore Wind Farms (OWFs), but as a consequence, the control of theoffshore AC grid becomes challenging. The replacement of the offshore Voltage Source Converter (VSC)by a passive DR leads to major research questions pertaining to the control of the offshore AC grid. Toachieve the wind farm operation and seamless power extraction, many grid forming solutions have beendevised. This paper reviews a few of the major control solutions for AC grid forming and operationof DR-HVDC based OWFs, following which a comparison is made between them. Then two of thesesolutions are selected and implemented in a study case OWF model. By using the simulation results andfurther analysis, the approaches adopted by these two solutions are elaborated further and the variouschallenges regarding the operation and control of the DR-HVDC based OWF are highlighted. |
