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THD Analysis of A VSC based HVDC Transmission Using Multi-level Converters and Two-level Converters

Piyush Sahu, Vasant Acharya

Nowadays Off-shore wind farms are rising and promising alternative power sources. It requires HVDC transmission which has compact and reliable converter technology with large power capability. Multi-level Converter topology is a new and assuring converter for High Voltage Direct Current (HVDC) applications. To gain the compactness of the station the need for filters should be minimized. The Multilevel topology might address these aims. This paper introduces the research on modelling of VSC- HVDC System using Multi-level Converters, connecting two AC systems. This paper presents comparative analysis of a VSC-HVDC System using multi-level and two-level converter topology, to calculate THD. This paper briefly explains Multi-level VSC-HVDC system and its control system.