Dynamics and stability of matrix-converter based permanent magnet wind turbine generator

This paper proposes a boost configuration of wind turbine generation system based on matrix converters. The proposed boost configuration features i) the limitation of the voltage transfer ratio of 0.866 will not limit the terminal voltage at the stator winding under normal operating mode; and ii) low voltage ride through capability is enhanced when grid disturbances occur. The main attention of this paper is focused on the dynamics and stability issue of the matrix-converter based wind turbine generation system, which very much distinguishes itself from the systems that consist of voltage source inverters or current source inverters, where the dynamics of input and output state variables are naturally decoupled by the large-enough passive components in the dc link. Stability criterion that will guide proper design of the system is proposed and validated through numerical simulation.