Advancements in Multiterminal HVDC Systems: Integrating Wind and Solar Power

This study explores integrating renewable energy resources (RERs) through microgrids and advancing high voltage direct current (HVDC) technology. It addresses the traditional limitations of HVDC in microgrid integration by modeling and control studies of modular multilevel converters (MMCs) while using the Borrego microgrid (located in California) as a reference system. By employing a second harmonic capacitor voltage-eliminating controller (SHCVEC) to manage capacitor voltage fluctuations in MMCs within a multiterminal DC (MTDC) system, the proposed approach effectively controls the voltage variations and regulates the circulating current. This control system optimizes current extraction to achieve maximum power point tracking (MPPT) during both gradual and sudden load transitions, highlighting its importance in enhancing grid resilience and efficiency.