MMC based PV Energy Integrated Multiterminal HVDC Transmission Network

This research presents the modeling and control of Modular Multilevel Converter (MMC) based multiterminal HVDC transmission system for solar energy integration. It includes detailed MMC model where circulating current of the arm and submodule capacitor voltage balancing are considered. The proposed network considers single PV unit with complete dynamics and follows the behavior of that PV unit during scaling it's capacity. Furthermore, it optimally integrates solar energy using a modified incremental conductance method. The complete system has been implemented in RTDS. Performance of the MMC controller has been evaluated with severe balanced and unbalanced faults. The performance shows the improvement of low voltage ride through capability during faults at the common coupling point of AC grids.