Optimized Control and Parametrization of Modular Multilevel VSC-HVDC Transmission System for Integrating Offshore Wind Farms

This paper introduces an optimized control structure with parametrization of modular multi-level converter (MMC) for high voltage direct current (HVDC) applications such as offshore large-scale windfarms. This paper is introduced to deal with the problems of high cost and high space requirements of HVDC-MMCs. The optimization is introduced using an analytical approach utilizing some improved controllers’ concepts to reduce the significant number of submodules and capacitance needed for a well performing MMC. This paper also considers the challenges with connecting large offshore wind farms like low short circuit ratio (SCR), power fluctuations, multi terminal HVDC (MTDC) grids needs for operation and cost effectiveness of HVDC-MMC deployment in future projects. All these considerations helped with reaching a realistic, reliable and sustainable design for HVDC-MMCs.