Interoperability of Modular Multilevel and Alternate Arm Converters in Hybrid HVDC Systems

This paper demonstrates the interoperability of an emerging alternate arm converter (AAC) with state-of-the-art modular multilevel (MMC) in high-voltage direct current (HVDC) systems based on a hybrid VSC-HVDC system. The also showcases parameter derivation HVDC system and its detailed control structure. study provides preliminary steps towards analysis AAC complex dc grid configurations. A set results 800 MVA voltage source (VSC)-HVDC performance under different operating scenarios verifies associated functions.