Enhanced Fault Ride Through Capability of Matrix Converter for Wind Power System

The matrix converter has many advantages in wind power system applications. Matrix converter is compact and highly efficient because it directly converts power from AC generator to the grid without intermediate DC bus while conventional back-to-back converter system requires a lot of electrolytic capacitors in DC link bus which are bulky and have short life-time. Matrix converter has both motoring and regenerative power flow maintaining low harmonics current to the grid. It is required for wind power converter to provide reactive power to the grid, which is one of the most important characteristics for wind farms to stabilize the power system during and after grid failure. In this paper, an enhanced fault ride through capability of high power matrix converter for wind power system is proposed. The proposed ride through technique during grid voltage drop is explained, and it is verified by simulation and experiment results.