MMCC based PMSG for Oceanic Wave Energy Conversion System

This paper presents the use of a Modular Multilevel Cascaded converter (MMCC) based Permanent magnet synchronous generator (PMSG) to harness the Oceanic Wave Energy (OWE). A direct-drive PMSG with Wells Turbine operates at a variable speed in a wide speed range and gives optimized power output using an MPPT algorithm. In this paper, MMCC is used to connect a PMSG operating at variable voltage and variable frequency to a fixed voltage fixed frequency grid in a single stage with the full control over grid-side current and machine side current. Analytical expressions supported by simulation results are presented to validate the performance of the proposed scheme.