Harmonic filter reduction of off-shore wind farms connected with a diode based HVDC link

The filter bank size is one of the main deterrents for the use of otherwise more efficient LCC-HVDC links for the connection of large off-shore wind farms. This paper shows how the HVDC rectifier filter banks can be substantially reduced by taking advantage of the additional control flexibility offered by the use of wind turbines with fully rated converters. PSCAD simulation results are shown where rectifier filter banks are substantially reduced. System wide implications and impact on overall efficiency is analyzed and discussed.