A New Hybrid Multi-Level Voltage-Source Converter with DC Fault Blocking Capability

This paper clarifies the working standards, supported by simulation results, of another converter topology proposed for HVDC application, called the Alternate Arm Converter (AAC). It is hybrid between the multilevel converter, as a result of the presence of H-bridge cells, and the 2-level converter, as chief switches in each arm. This converter can create a multi-level AC voltage and, since its heaps of cells comprise of H-connect cells rather than halfbridge cells, they can produce higher AC voltage than the DC terminal voltage. This permits the AAC to work at an ideal point, called the "sweet spot", where the AC and DC energy streams equivalent. The chief switches in the AAC are answerable for rotating the conduction time of each arm, prompting a critical decrease in the quantity of cells in the stacks. Moreover, the AAC can keep control of the current in the stage reactor even if there should arise an occurrence of a DC-side deficiency and backing the AC lattice, through a STATCOM mode. Recreation results and misfortune counts are introduced in this paper to help the asserted highlights of the AAC.