TY - SER AU - Nikoobakht, Ahmad AU - Aghaei, Jamshid AU - Niknam, Taher AU - Vahidinasab, Vahid TI - Towards Robust Opf Solution Strategy for Future Ac/Dc Grids: Case of Vsc-Hvdc-Connected Offshore Wind Farms KW - Wind Farms KW - Power System Operation KW - High Penetration ER -