Full-power converter based test bench for low voltage ride-through testing of wind turbine converters

This paper describes a full-power converter based test bench to generate voltage sags for fault ride-through (FRT) testing of the full-power converter based wind turbine drive. Principles of the test bench control and the generation of different types of voltage dips are explained. Proposed test bench is also briefly compared with the shunt impedance based voltage dip generation system in terms of features and operation. Finally, measurement results from LVRT tests using a 1.8 MVA full-scale test bench are shown.